mojoshader_preprocessor.c
author Ryan C. Gordon <icculus@icculus.org>
Sun, 15 Feb 2009 20:14:35 -0500
changeset 633 9cd2376b9aa2
parent 632 a5f63a10ed91
child 636 6923c9cfb4b9
permissions -rw-r--r--
Renamed buffer_init() to init_buffer() to match rest of function names.
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/**
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 * MojoShader; generate shader programs from bytecode of compiled
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 *  Direct3D shaders.
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 *
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 * Please see the file LICENSE.txt in the source's root directory.
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 *
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 *  This file written by Ryan C. Gordon.
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 */
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#define __MOJOSHADER_INTERNAL__ 1
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#include "mojoshader_internal.h"
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#if DEBUG_PREPROCESSOR
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    #define print_debug_token(token, len, val) \
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        MOJOSHADER_print_debug_token("PREPROCESSOR", token, len, val)
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#else
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    #define print_debug_token(token, len, val)
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#endif
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#if DEBUG_LEXER
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static Token debug_preprocessor_internal_lexer(IncludeState *s)
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{
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    const Token retval = preprocessor_internal_lexer(s);
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    MOJOSHADER_print_debug_token("LEXER", s->token,
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                                 (unsigned int) (s->source - s->token),
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                                 retval);
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    return retval;
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} // debug_preprocessor_internal_lexer
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#define preprocessor_internal_lexer(s) debug_preprocessor_internal_lexer(s)
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#endif
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typedef struct DefineHash
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{
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    MOJOSHADER_preprocessorDefine define;
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    struct DefineHash *next;
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} DefineHash;
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// Simple linked list to cache source filenames, so we don't have to copy
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//  the same string over and over for each opcode.
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typedef struct FilenameCache
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{
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    char *filename;
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    struct FilenameCache *next;
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} FilenameCache;
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typedef struct Context
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{
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    int isfail;
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    int out_of_memory;
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    char failstr[256];
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    Conditional *conditional_pool;
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    IncludeState *include_stack;
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    DefineHash *define_hashtable[256];
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    FilenameCache *filename_cache;
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    MOJOSHADER_includeOpen open_callback;
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    MOJOSHADER_includeClose close_callback;
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    MOJOSHADER_malloc malloc;
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    MOJOSHADER_free free;
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    void *malloc_data;
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} Context;
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// Convenience functions for allocators...
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static inline void out_of_memory(Context *ctx)
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{
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    ctx->out_of_memory = 1;
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} // out_of_memory
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static inline void *Malloc(Context *ctx, const size_t len)
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{
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    void *retval = ctx->malloc((int) len, ctx->malloc_data);
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    if (retval == NULL)
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        out_of_memory(ctx);
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    return retval;
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} // Malloc
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static inline void Free(Context *ctx, void *ptr)
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{
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    if (ptr != NULL)  // check for NULL in case of dumb free() impl.
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        ctx->free(ptr, ctx->malloc_data);
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} // Free
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static inline char *StrDup(Context *ctx, const char *str)
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{
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    char *retval = (char *) Malloc(ctx, strlen(str) + 1);
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    if (retval != NULL)
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        strcpy(retval, str);
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    return retval;
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} // StrDup
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static void failf(Context *ctx, const char *fmt, ...) ISPRINTF(2,3);
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static void failf(Context *ctx, const char *fmt, ...)
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{
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    ctx->isfail = 1;
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    va_list ap;
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    va_start(ap, fmt);
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    vsnprintf(ctx->failstr, sizeof (ctx->failstr), fmt, ap);
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    va_end(ap);
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} // failf
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static inline void fail(Context *ctx, const char *reason)
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{
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    failf(ctx, "%s", reason);
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} // fail
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#if DEBUG_TOKENIZER
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void MOJOSHADER_print_debug_token(const char *subsystem, const char *token,
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                                  const unsigned int tokenlen,
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                                  const Token tokenval)
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{
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    printf("%s TOKEN: \"", subsystem);
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    unsigned int i;
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    for (i = 0; i < tokenlen; i++)
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    {
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        if (token[i] == '\n')
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            printf("\\n");
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        else if (token[i] == '\\')
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            printf("\\\\");
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        else
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            printf("%c", token[i]);
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    } // for
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    printf("\" (");
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    switch (tokenval)
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    {
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        #define TOKENCASE(x) case x: printf("%s", #x); break
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        TOKENCASE(TOKEN_UNKNOWN);
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        TOKENCASE(TOKEN_IDENTIFIER);
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        TOKENCASE(TOKEN_INT_LITERAL);
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        TOKENCASE(TOKEN_FLOAT_LITERAL);
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        TOKENCASE(TOKEN_STRING_LITERAL);
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        TOKENCASE(TOKEN_ADDASSIGN);
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        TOKENCASE(TOKEN_SUBASSIGN);
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        TOKENCASE(TOKEN_MULTASSIGN);
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        TOKENCASE(TOKEN_DIVASSIGN);
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        TOKENCASE(TOKEN_MODASSIGN);
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        TOKENCASE(TOKEN_XORASSIGN);
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        TOKENCASE(TOKEN_ANDASSIGN);
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        TOKENCASE(TOKEN_ORASSIGN);
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        TOKENCASE(TOKEN_INCREMENT);
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        TOKENCASE(TOKEN_DECREMENT);
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        TOKENCASE(TOKEN_RSHIFT);
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        TOKENCASE(TOKEN_LSHIFT);
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        TOKENCASE(TOKEN_ANDAND);
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        TOKENCASE(TOKEN_OROR);
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        TOKENCASE(TOKEN_LEQ);
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        TOKENCASE(TOKEN_GEQ);
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        TOKENCASE(TOKEN_EQL);
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        TOKENCASE(TOKEN_NEQ);
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        TOKENCASE(TOKEN_HASHHASH);
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        TOKENCASE(TOKEN_PP_INCLUDE);
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        TOKENCASE(TOKEN_PP_LINE);
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        TOKENCASE(TOKEN_PP_DEFINE);
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        TOKENCASE(TOKEN_PP_UNDEF);
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        TOKENCASE(TOKEN_PP_IF);
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        TOKENCASE(TOKEN_PP_IFDEF);
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        TOKENCASE(TOKEN_PP_IFNDEF);
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        TOKENCASE(TOKEN_PP_ELSE);
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        TOKENCASE(TOKEN_PP_ELIF);
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        TOKENCASE(TOKEN_PP_ENDIF);
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        TOKENCASE(TOKEN_PP_ERROR);
604
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        TOKENCASE(TOKEN_INCOMPLETE_COMMENT);
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        TOKENCASE(TOKEN_BAD_CHARS);
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        TOKENCASE(TOKEN_EOI);
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        TOKENCASE(TOKEN_PREPROCESSING_ERROR);
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        #undef TOKENCASE
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        case ((Token) '\n'):
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            printf("'\\n'");
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            break;
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629
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        case ((Token) '\\'):
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            printf("'\\\\'");
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            break;
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587
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        default:
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            assert(((int)tokenval) < 256);
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            printf("'%c'", (char) tokenval);
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            break;
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    } // switch
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    printf(")\n");
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} // MOJOSHADER_print_debug_token
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#endif
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611
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#if !MOJOSHADER_FORCE_INCLUDE_CALLBACKS
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// !!! FIXME: most of these _MSC_VER should probably be _WINDOWS?
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#ifdef _MSC_VER
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#define WIN32_LEAN_AND_MEAN 1
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#include <windows.h>  // GL headers need this for WINGDIAPI definition.
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#else
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#endif
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int MOJOSHADER_internal_include_open(MOJOSHADER_includeType inctype,
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                                     const char *fname, const char *parent,
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                                     const char **outdata,
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                                     unsigned int *outbytes,
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                                     MOJOSHADER_malloc m, MOJOSHADER_free f,
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                                     void *d)
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{
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#ifdef _MSC_VER
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#error Write me.
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#else
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    struct stat statbuf;
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    if (stat(fname, &statbuf) == -1)
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        return 0;
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    char *data = (char *) m(statbuf.st_size, d);
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    if (data == NULL)
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        return 0;
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    const int fd = open(fname, O_RDONLY);
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    if (fd == -1)
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    {
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        f(data, d);
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        return 0;
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    } // if
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    if (read(fd, data, statbuf.st_size) != statbuf.st_size)
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    {
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        f(data, d);
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        close(fd);
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        return 0;
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   228
    } // if
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    close(fd);
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    *outdata = data;
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   231
    *outbytes = (unsigned int) statbuf.st_size;
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    return 1;
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   233
#endif
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   234
} // MOJOSHADER_internal_include_open
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void MOJOSHADER_internal_include_close(const char *data, MOJOSHADER_malloc m,
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                                       MOJOSHADER_free f, void *d)
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{
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   240
    f((void *) data, d);
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   241
} // MOJOSHADER_internal_include_close
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#endif  // !MOJOSHADER_FORCE_INCLUDE_CALLBACKS
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   244
632
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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// data buffer stuff...
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#define BUFFER_LEN (64 * 1024)
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typedef struct BufferList
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{
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    char buffer[BUFFER_LEN];
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    size_t bytes;
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    struct BufferList *next;
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} BufferList;
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typedef struct Buffer
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{
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    size_t total_bytes;
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    BufferList head;
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    BufferList *tail;
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} Buffer;
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633
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static void init_buffer(Buffer *buffer)
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{
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   264
    buffer->total_bytes = 0;
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    buffer->head.bytes = 0;
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   266
    buffer->head.next = NULL;
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   267
    buffer->tail = &buffer->head;
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   268
} // init_buffer
632
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static int add_to_buffer(Buffer *buffer, const char *data,
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                         size_t len, MOJOSHADER_malloc m, void *d)
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{
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    buffer->total_bytes += len;
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   275
    while (len > 0)
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    {
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        const size_t avail = BUFFER_LEN - buffer->tail->bytes;
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        const size_t cpy = (avail > len) ? len : avail;
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        memcpy(buffer->tail->buffer + buffer->tail->bytes, data, cpy);
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        len -= cpy;
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   281
        data += cpy;
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   282
        buffer->tail->bytes += cpy;
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   283
        assert(buffer->tail->bytes <= BUFFER_LEN);
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        if (buffer->tail->bytes == BUFFER_LEN)
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   285
        {
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   286
            BufferList *item = (BufferList *) m(sizeof (BufferList), d);
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   287
            if (item == NULL)
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diff changeset
   288
                return 0;
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diff changeset
   289
            item->bytes = 0;
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diff changeset
   290
            item->next = NULL;
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diff changeset
   291
            buffer->tail->next = item;
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   292
            buffer->tail = item;
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diff changeset
   293
        } // if
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diff changeset
   294
    } // while
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   295
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   296
    return 1;
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diff changeset
   297
} // add_to_buffer
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   298
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   299
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   300
static char *flatten_buffer(Buffer *buffer, MOJOSHADER_malloc m, void *d)
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   301
{
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   302
    char *retval = m(buffer->total_bytes + 1, d);
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   303
    if (retval == NULL)
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diff changeset
   304
        return NULL;
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diff changeset
   305
    BufferList *item = &buffer->head;
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diff changeset
   306
    char *ptr = retval;
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diff changeset
   307
    while (item != NULL)
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diff changeset
   308
    {
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diff changeset
   309
        BufferList *next = item->next;
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diff changeset
   310
        memcpy(ptr, item->buffer, item->bytes);
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diff changeset
   311
        ptr += item->bytes;
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diff changeset
   312
        item = next;
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diff changeset
   313
    } // while
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diff changeset
   314
    *ptr = '\0';
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diff changeset
   315
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   316
    assert(ptr == (retval + buffer->total_bytes));
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   317
    return retval;
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   318
} // flatten_buffer
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   319
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diff changeset
   320
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   321
static void free_buffer(Buffer *buffer, MOJOSHADER_free f, void *d)
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   322
{
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diff changeset
   323
    // head is statically allocated, so start with head.next...
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diff changeset
   324
    BufferList *item = buffer->head.next;
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   325
    while (item != NULL)
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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parents: 631
diff changeset
   326
    {
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diff changeset
   327
        BufferList *next = item->next;
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   328
        f(item, d);
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
Ryan C. Gordon <icculus@icculus.org>
parents: 631
diff changeset
   329
        item = next;
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   330
    } // while
633
9cd2376b9aa2 Renamed buffer_init() to init_buffer() to match rest of function names.
Ryan C. Gordon <icculus@icculus.org>
parents: 632
diff changeset
   331
    init_buffer(buffer);
632
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   332
} // free_buffer
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   333
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   334
a5f63a10ed91 Moved Buffer stuff higher up, so internal routines can use it.
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diff changeset
   335
620
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diff changeset
   336
// Conditional pool stuff...
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diff changeset
   337
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diff changeset
   338
static void free_conditional_pool(Context *ctx)
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diff changeset
   339
{
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diff changeset
   340
    Conditional *item = ctx->conditional_pool;
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diff changeset
   341
    while (item != NULL)
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diff changeset
   342
    {
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diff changeset
   343
        Conditional *next = item->next;
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diff changeset
   344
        Free(ctx, item);
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diff changeset
   345
        item = next;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   346
    } // while
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diff changeset
   347
} // free_conditional_pool
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   348
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   349
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   350
static Conditional *get_conditional(Context *ctx)
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Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   351
{
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parents: 618
diff changeset
   352
    Conditional *retval = ctx->conditional_pool;
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Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   353
    if (retval != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
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parents: 618
diff changeset
   354
        ctx->conditional_pool = retval->next;
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Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   355
    else
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   356
        retval = (Conditional *) Malloc(ctx, sizeof (Conditional));
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   357
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   358
    if (retval != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   359
        memset(retval, '\0', sizeof (Conditional));
1c4cf996004e Initial work on preprocessor conditionals.
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parents: 618
diff changeset
   360
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   361
    return retval;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   362
} // get_conditional
1c4cf996004e Initial work on preprocessor conditionals.
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parents: 618
diff changeset
   363
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   364
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   365
static void put_conditionals(Context *ctx, Conditional *item)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   366
{
1c4cf996004e Initial work on preprocessor conditionals.
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parents: 618
diff changeset
   367
    while (item != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   368
    {
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   369
        Conditional *next = item->next;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   370
        item->next = ctx->conditional_pool;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   371
        ctx->conditional_pool = item;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   372
        item = next;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   373
    } // while
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   374
} // put_conditionals
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   375
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   376
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   377
// Preprocessor define hashtable stuff...
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   378
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   379
static unsigned char hash_define(const char *sym)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   380
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   381
    unsigned char retval = 0;
622
59b3003f6494 Fixed logic bug in string loop.
Ryan C. Gordon <icculus@icculus.org>
parents: 621
diff changeset
   382
    while (*sym)
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   383
        retval += *(sym++);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   384
    return retval;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   385
} // hash_define
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   386
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   387
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   388
static int add_define(Context *ctx, const char *sym, const char *val)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   389
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   390
    char *identifier = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   391
    char *definition = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   392
    const unsigned char hash = hash_define(sym);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   393
    DefineHash *bucket = ctx->define_hashtable[hash];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   394
    while (bucket)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   395
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   396
        if (strcmp(bucket->define.identifier, sym) == 0)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   397
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   398
            failf(ctx, "'%s' already defined", sym);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   399
            return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   400
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   401
        bucket = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   402
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   403
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   404
    bucket = (DefineHash *) Malloc(ctx, sizeof (DefineHash));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   405
    if (bucket == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   406
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   407
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   408
    identifier = (char *) Malloc(ctx, strlen(sym) + 1);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   409
    definition = (char *) Malloc(ctx, strlen(val) + 1);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   410
    if ((identifier == NULL) || (definition == NULL))
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   411
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   412
        Free(ctx, identifier);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   413
        Free(ctx, definition);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   414
        Free(ctx, bucket);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   415
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   416
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   417
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   418
    strcpy(identifier, sym);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   419
    strcpy(definition, val);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   420
    bucket->define.identifier = identifier;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   421
    bucket->define.definition = definition;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   422
    bucket->next = ctx->define_hashtable[hash];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   423
    ctx->define_hashtable[hash] = bucket;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   424
    return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   425
} // add_define
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   426
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   427
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   428
static int remove_define(Context *ctx, const char *sym)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   429
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   430
    const unsigned char hash = hash_define(sym);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   431
    DefineHash *bucket = ctx->define_hashtable[hash];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   432
    DefineHash *prev = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   433
    while (bucket)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   434
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   435
        if (strcmp(bucket->define.identifier, sym) == 0)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   436
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   437
            if (prev == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   438
                ctx->define_hashtable[hash] = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   439
            else
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   440
                prev->next = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   441
            Free(ctx, (void *) bucket->define.identifier);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   442
            Free(ctx, (void *) bucket->define.definition);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   443
            Free(ctx, bucket);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   444
            return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   445
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   446
        prev = bucket;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   447
        bucket = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   448
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   449
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   450
    return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   451
} // remove_define
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   452
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   453
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   454
static const char *find_define(Context *ctx, const char *sym)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   455
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   456
    const unsigned char hash = hash_define(sym);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   457
    DefineHash *bucket = ctx->define_hashtable[hash];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   458
    while (bucket)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   459
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   460
        if (strcmp(bucket->define.identifier, sym) == 0)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   461
            return bucket->define.definition;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   462
        bucket = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   463
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   464
    return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   465
} // find_define
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   466
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   467
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   468
static void free_all_defines(Context *ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   469
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   470
    int i;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   471
    for (i = 0; i < STATICARRAYLEN(ctx->define_hashtable); i++)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   472
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   473
        DefineHash *bucket = ctx->define_hashtable[i];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   474
        ctx->define_hashtable[i] = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   475
        while (bucket)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   476
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   477
            DefineHash *next = bucket->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   478
            Free(ctx, (void *) bucket->define.identifier);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   479
            Free(ctx, (void *) bucket->define.definition);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   480
            Free(ctx, bucket);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   481
            bucket = next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   482
        } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   483
    } // for
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   484
} // find_define
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   485
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   486
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   487
// filename cache stuff...
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   488
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   489
static const char *cache_filename(Context *ctx, const char *fname)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   490
{
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   491
    if (fname == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   492
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   493
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   494
    // !!! FIXME: this could be optimized into a hash table, but oh well.
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   495
    FilenameCache *item = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   496
    while (item != NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   497
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   498
        if (strcmp(item->filename, fname) == 0)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   499
            return item->filename;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   500
        item = item->next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   501
    } // while
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   502
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   503
    // new cache item.
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   504
    item = (FilenameCache *) Malloc(ctx, sizeof (FilenameCache));
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   505
    if (item == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   506
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   507
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   508
    item->filename = StrDup(ctx, fname);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   509
    if (item->filename == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   510
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   511
        Free(ctx, item);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   512
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   513
    } // if
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   514
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   515
    item->next = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   516
    ctx->filename_cache = item;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   517
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   518
    return item->filename;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   519
} // cache_filename
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   520
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   521
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   522
static void free_filename_cache(Context *ctx)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   523
{
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   524
    FilenameCache *item = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   525
    while (item != NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   526
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   527
        FilenameCache *next = item->next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   528
        Free(ctx, item->filename);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   529
        Free(ctx, item);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   530
        item = next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   531
    } // while
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   532
} // free_filename_cache
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   533
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   534
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   535
static int push_source(Context *ctx, const char *fname, const char *source,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   536
                       unsigned int srclen, int included)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   537
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   538
    IncludeState *state = (IncludeState *) Malloc(ctx, sizeof (IncludeState));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   539
    if (state == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   540
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   541
    memset(state, '\0', sizeof (IncludeState));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   542
560
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   543
    if (fname != NULL)
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   544
    {
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   545
        state->filename = cache_filename(ctx, fname);
560
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   546
        if (state->filename == NULL)
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   547
        {
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   548
            Free(ctx, state);
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   549
            return 0;
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   550
        } // if
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   551
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   552
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   553
    state->included = included;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   554
    state->source_base = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   555
    state->source = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   556
    state->token = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   557
    state->bytes_left = srclen;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   558
    state->line = 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   559
    state->next = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   560
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   561
    ctx->include_stack = state;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   562
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   563
    return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   564
} // push_source
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   565
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   566
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   567
static void pop_source(Context *ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   568
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   569
    IncludeState *state = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   570
    if (state == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   571
        return;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   572
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   573
    if (state->included)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   574
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   575
        ctx->close_callback(state->source_base, ctx->malloc,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   576
                            ctx->free, ctx->malloc_data);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   577
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   578
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   579
    // state->filename is a pointer to the filename cache; don't free it here!
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   580
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   581
    put_conditionals(ctx, state->conditional_stack);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   582
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   583
    ctx->include_stack = state->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   584
    Free(ctx, state);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   585
} // pop_source
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   586
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   587
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   588
Preprocessor *preprocessor_start(const char *fname, const char *source,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   589
                            unsigned int sourcelen,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   590
                            MOJOSHADER_includeOpen open_callback,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   591
                            MOJOSHADER_includeClose close_callback,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   592
                            const MOJOSHADER_preprocessorDefine **defines,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   593
                            unsigned int define_count,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   594
                            MOJOSHADER_malloc m, MOJOSHADER_free f, void *d)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   595
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   596
    int okay = 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   597
    int i = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   598
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   599
    // the preprocessor is internal-only, so we verify all these are != NULL.
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   600
    assert(m != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   601
    assert(f != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   602
    assert(open_callback != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   603
    assert(close_callback != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   604
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   605
    Context *ctx = (Context *) m(sizeof (Context), d);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   606
    if (ctx == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   607
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   608
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   609
    memset(ctx, '\0', sizeof (Context));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   610
    ctx->malloc = m;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   611
    ctx->free = f;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   612
    ctx->malloc_data = d;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   613
    ctx->open_callback = open_callback;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   614
    ctx->close_callback = close_callback;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   615
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   616
    for (i = 0; i < define_count; i++)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   617
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   618
        if (!add_define(ctx, defines[i]->identifier, defines[i]->definition))
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   619
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   620
            okay = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   621
            break;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   622
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   623
    } // for
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   624
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   625
    if ((okay) && (!push_source(ctx, fname, source, sourcelen, 0)))
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   626
        okay = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   627
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   628
    if (!okay)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   629
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   630
        preprocessor_end((Preprocessor *) ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   631
        return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   632
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   633
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   634
    return (Preprocessor *) ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   635
} // preprocessor_start
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   636
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   637
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   638
void preprocessor_end(Preprocessor *_ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   639
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   640
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   641
    if (ctx == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   642
        return;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   643
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   644
    while (ctx->include_stack != NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   645
        pop_source(ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   646
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   647
    free_all_defines(ctx);
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   648
    free_filename_cache(ctx);
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   649
    free_conditional_pool(ctx);
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   650
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   651
    Free(ctx, ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   652
} // preprocessor_end
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   653
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   654
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   655
int preprocessor_outofmemory(Preprocessor *_ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   656
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   657
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   658
    return ctx->out_of_memory;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   659
} // preprocessor_outofmemory
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   660
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   661
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   662
static int require_newline(IncludeState *state)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   663
{
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   664
    const char *source = state->source;
626
95d97e613112 Fixed line numbers when a preprocessor directive fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 625
diff changeset
   665
    const unsigned int linenum = state->line;
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   666
    const Token token = preprocessor_internal_lexer(state);
626
95d97e613112 Fixed line numbers when a preprocessor directive fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 625
diff changeset
   667
    state->source = source;  // rewind no matter what.
95d97e613112 Fixed line numbers when a preprocessor directive fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 625
diff changeset
   668
    state->line = linenum;
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   669
    if (token == TOKEN_INCOMPLETE_COMMENT)
626
95d97e613112 Fixed line numbers when a preprocessor directive fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 625
diff changeset
   670
        return 1; // call it an eol.
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   671
    return ( (token == ((Token) '\n')) || (token == TOKEN_EOI) );
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   672
} // require_newline
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   673
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   674
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   675
static void handle_pp_include(Context *ctx)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   676
{
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   677
    IncludeState *state = ctx->include_stack;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   678
    Token token = preprocessor_internal_lexer(state);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   679
    MOJOSHADER_includeType incltype;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   680
    char *filename = NULL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   681
    int bogus = 0;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   682
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   683
    if (token == TOKEN_STRING_LITERAL)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   684
        incltype = MOJOSHADER_INCLUDETYPE_LOCAL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   685
    else if (token == ((Token) '<'))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   686
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   687
        incltype = MOJOSHADER_INCLUDETYPE_SYSTEM;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   688
        // can't use lexer, since every byte between the < > pair is
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   689
        //  considered part of the filename.  :/
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   690
        while (!bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   691
        {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   692
            if ( !(bogus = (state->bytes_left == 0)) )
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   693
            {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   694
                const char ch = *state->source;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   695
                if ( !(bogus = ((ch == '\r') || (ch == '\n'))) )
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   696
                {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   697
                    state->source++;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   698
                    state->bytes_left--;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   699
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   700
                    if (ch == '>')
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   701
                        break;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   702
                } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   703
            } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   704
        } // while
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   705
    } // else if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   706
    else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   707
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   708
        bogus = 1;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   709
    } // else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   710
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   711
    if (!bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   712
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   713
        state->token++;  // skip '<' or '\"'...
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   714
        const unsigned int len = ((unsigned int) (state->source-state->token));
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   715
        filename = (char *) alloca(len);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   716
        memcpy(filename, state->token, len-1);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   717
        filename[len-1] = '\0';
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   718
        bogus = !require_newline(state);
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   719
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   720
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   721
    if (bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   722
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   723
        fail(ctx, "Invalid #include directive");
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   724
        return;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   725
    } // else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   726
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   727
    const char *newdata = NULL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   728
    unsigned int newbytes = 0;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   729
    if (!ctx->open_callback(incltype, filename, state->source_base,
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   730
                            &newdata, &newbytes, ctx->malloc,
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   731
                            ctx->free, ctx->malloc_data))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   732
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   733
        fail(ctx, "Include callback failed");  // !!! FIXME: better error
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   734
        return;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   735
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   736
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   737
    if (!push_source(ctx, filename, newdata, newbytes, 1))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   738
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   739
        assert(ctx->out_of_memory);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   740
        ctx->close_callback(newdata, ctx->malloc, ctx->free, ctx->malloc_data);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   741
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   742
} // handle_pp_include
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   743
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   744
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   745
static void handle_pp_line(Context *ctx)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   746
{
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   747
    IncludeState *state = ctx->include_stack;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   748
    char *filename = NULL;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   749
    int linenum = 0;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   750
    int bogus = 0;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   751
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   752
    if (preprocessor_internal_lexer(state) != TOKEN_INT_LITERAL)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   753
        bogus = 1;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   754
    else
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   755
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   756
        const unsigned int len = ((unsigned int) (state->source-state->token));
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   757
        char *buf = (char *) alloca(len+1);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   758
        memcpy(buf, state->token, len);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   759
        buf[len] = '\0';
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   760
        linenum = atoi(buf);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   761
    } // else
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   762
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   763
    if (!bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   764
        bogus = (preprocessor_internal_lexer(state) != TOKEN_STRING_LITERAL);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   765
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   766
    if (!bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   767
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   768
        state->token++;  // skip '\"'...
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   769
        const unsigned int len = ((unsigned int) (state->source-state->token));
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   770
        filename = (char *) alloca(len);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   771
        memcpy(filename, state->token, len-1);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   772
        filename[len-1] = '\0';
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   773
        bogus = !require_newline(state);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   774
    } // if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   775
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   776
    if (bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   777
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   778
        fail(ctx, "Invalid #line directive");
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   779
        return;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   780
    } // if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   781
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   782
    const char *cached = cache_filename(ctx, filename);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   783
    assert((cached != NULL) || (ctx->out_of_memory));
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   784
    state->filename = cached;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   785
    state->line = linenum;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   786
} // handle_pp_line
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   787
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   788
627
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   789
// !!! FIXME: this should use the lexer, apparently gcc does so.
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   790
static void handle_pp_error(Context *ctx)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   791
{
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   792
    IncludeState *state = ctx->include_stack;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   793
    const char *data = NULL;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   794
    int done = 0;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   795
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   796
    const char *source = NULL;
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   797
    while (!done)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   798
    {
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   799
        source = state->source;
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   800
        const Token token = preprocessor_internal_lexer(state);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   801
        switch (token)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   802
        {
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   803
            case ((Token) '\n'):
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   804
                state->line--;  // make sure error is on the right line.
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   805
                // fall through!
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   806
            case TOKEN_INCOMPLETE_COMMENT:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   807
            case TOKEN_EOI:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   808
                done = 1;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   809
                break;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   810
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   811
            default:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   812
                if (data == NULL)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   813
                    data = state->token;  // skip #error token.
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   814
                break;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   815
        } // switch
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   816
    } // while
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   817
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   818
    state->source = source;  // move back so we catch this later.
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   819
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   820
    const char *prefix = "#error ";
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   821
    const size_t prefixlen = strlen(prefix);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   822
    const int len = (int) (state->source - data);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   823
    const int cpy = Min(len, sizeof (ctx->failstr) - prefixlen);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   824
    strcpy(ctx->failstr, prefix);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   825
    if (cpy > 0)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   826
        memcpy(ctx->failstr + prefixlen, data, cpy);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   827
    ctx->failstr[cpy + prefixlen] = '\0';
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   828
    ctx->isfail = 1;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   829
} // handle_pp_error
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   830
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   831
618
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   832
static void handle_pp_undef(Context *ctx)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   833
{
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   834
    IncludeState *state = ctx->include_stack;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   835
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   836
    if (preprocessor_internal_lexer(state) != TOKEN_IDENTIFIER)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   837
    {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   838
        fail(ctx, "Macro names must be indentifiers");
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   839
        return;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   840
    } // if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   841
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   842
    const unsigned int len = ((unsigned int) (state->source-state->token));
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   843
    char *sym = (char *) alloca(len);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   844
    memcpy(sym, state->token, len-1);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   845
    sym[len-1] = '\0';
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   846
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   847
    if (!require_newline(state))
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   848
    {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   849
        fail(ctx, "Invalid #undef directive");
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   850
        return;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   851
    } // if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   852
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   853
    remove_define(ctx, sym);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   854
} // handle_pp_undef
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   855
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   856
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   857
static Conditional *_handle_pp_ifdef(Context *ctx, const Token type)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   858
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   859
    IncludeState *state = ctx->include_stack;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   860
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   861
    assert((type == TOKEN_PP_IFDEF) || (type == TOKEN_PP_IFNDEF));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   862
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   863
    if (preprocessor_internal_lexer(state) != TOKEN_IDENTIFIER)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   864
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   865
        fail(ctx, "Macro names must be indentifiers");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   866
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   867
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   868
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   869
    const unsigned int len = ((unsigned int) (state->source-state->token));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   870
    char *sym = (char *) alloca(len);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   871
    memcpy(sym, state->token, len-1);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   872
    sym[len-1] = '\0';
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   873
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   874
    if (!require_newline(state))
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   875
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   876
        if (type == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   877
            fail(ctx, "Invalid #ifdef directive");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   878
        else
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   879
            fail(ctx, "Invalid #ifndef directive");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   880
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   881
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   882
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   883
    Conditional *conditional = get_conditional(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   884
    assert((conditional != NULL) || (ctx->out_of_memory));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   885
    if (conditional == NULL)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   886
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   887
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   888
    Conditional *prev = state->conditional_stack;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   889
    int skipping = ((prev != NULL) && (prev->skipping));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   890
    if (!skipping)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   891
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   892
        const int found = (find_define(ctx, sym) != NULL);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   893
        if (type == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   894
            skipping = !found;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   895
        else
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   896
            skipping = found;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   897
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   898
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   899
    conditional->type = type;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   900
    conditional->linenum = state->line - 1;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   901
    conditional->skipping = skipping;
625
bfb4016d9404 Fixed #else preprocessor directive so it'll work with #elif.
Ryan C. Gordon <icculus@icculus.org>
parents: 624
diff changeset
   902
    conditional->chosen = !skipping;
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   903
    conditional->next = prev;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   904
    state->conditional_stack = conditional;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   905
    return conditional;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   906
} // _handle_pp_ifdef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   907
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   908
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   909
static inline void handle_pp_ifdef(Context *ctx)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   910
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   911
    _handle_pp_ifdef(ctx, TOKEN_PP_IFDEF);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   912
} // handle_pp_ifdef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   913
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   914
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   915
static inline void handle_pp_ifndef(Context *ctx)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   916
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   917
    _handle_pp_ifdef(ctx, TOKEN_PP_IFNDEF);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   918
} // handle_pp_ifndef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   919
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   920
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   921
static inline void handle_pp_else(Context *ctx)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   922
{
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   923
    IncludeState *state = ctx->include_stack;
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   924
    Conditional *cond = state->conditional_stack;
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   925
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   926
    if (!require_newline(state))
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   927
        fail(ctx, "Invalid #else directive");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   928
    else if (cond == NULL)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   929
        fail(ctx, "#else without #if");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   930
    else if (cond->type == TOKEN_PP_ELSE)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   931
        fail(ctx, "#else after #else");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   932
    else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   933
    {
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   934
        cond->type = TOKEN_PP_ELSE;
625
bfb4016d9404 Fixed #else preprocessor directive so it'll work with #elif.
Ryan C. Gordon <icculus@icculus.org>
parents: 624
diff changeset
   935
        cond->skipping = cond->chosen;
bfb4016d9404 Fixed #else preprocessor directive so it'll work with #elif.
Ryan C. Gordon <icculus@icculus.org>
parents: 624
diff changeset
   936
        if (!cond->chosen)
bfb4016d9404 Fixed #else preprocessor directive so it'll work with #elif.
Ryan C. Gordon <icculus@icculus.org>
parents: 624
diff changeset
   937
            cond->chosen = 1;
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   938
    } // else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   939
} // handle_pp_else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   940
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   941
621
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   942
static void handle_pp_endif(Context *ctx)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   943
{
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   944
    IncludeState *state = ctx->include_stack;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   945
    Conditional *cond = state->conditional_stack;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   946
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   947
    if (!require_newline(state))
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   948
        fail(ctx, "Invalid #endif directive");
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   949
    else if (cond == NULL)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   950
        fail(ctx, "Unmatched #endif");
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   951
    else
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   952
    {
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   953
        state->conditional_stack = cond->next;  // pop it.
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   954
        cond->next = NULL;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   955
        put_conditionals(ctx, cond);
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   956
    } // else
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   957
} // handle_pp_endif
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   958
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   959
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   960
static void unterminated_pp_condition(Context *ctx)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   961
{
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   962
    IncludeState *state = ctx->include_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   963
    Conditional *cond = state->conditional_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   964
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   965
    // !!! FIXME: report the line number where the #if is, not the EOI.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   966
    switch (cond->type)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   967
    {
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   968
        case TOKEN_PP_IF: fail(ctx, "Unterminated #if"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   969
        case TOKEN_PP_IFDEF: fail(ctx, "Unterminated #ifdef"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   970
        case TOKEN_PP_IFNDEF: fail(ctx, "Unterminated #ifndef"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   971
        case TOKEN_PP_ELSE: fail(ctx, "Unterminated #else"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   972
        case TOKEN_PP_ELIF: fail(ctx, "Unterminated #elif"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   973
        default: assert(0 && "Shouldn't hit this case"); break;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   974
    } // switch
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   975
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   976
    // pop this conditional, we'll report the next error next time...
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   977
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   978
    state->conditional_stack = cond->next;  // pop it.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   979
    cond->next = NULL;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   980
    put_conditionals(ctx, cond);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   981
} // unterminated_pp_condition
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   982
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   983
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   984
static inline const char *_preprocessor_nexttoken(Preprocessor *_ctx,
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   985
                                             unsigned int *_len, Token *_token)
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   986
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   987
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   988
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   989
    while (1)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   990
    {
598
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   991
        if (ctx->isfail)
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   992
        {
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   993
            ctx->isfail = 0;
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   994
            *_token = TOKEN_PREPROCESSING_ERROR;
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   995
            *_len = strlen(ctx->failstr);
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   996
            return ctx->failstr;
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   997
        } // if
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   998
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   999
        IncludeState *state = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1000
        if (state == NULL)
559
d34ac77da171 Preprocessor should return TOKEN_EOI when we finish the whole include stack.
Ryan C. Gordon <icculus@icculus.org>
parents: 558
diff changeset
  1001
        {
d34ac77da171 Preprocessor should return TOKEN_EOI when we finish the whole include stack.
Ryan C. Gordon <icculus@icculus.org>
parents: 558
diff changeset
  1002
            *_token = TOKEN_EOI;
d34ac77da171 Preprocessor should return TOKEN_EOI when we finish the whole include stack.
Ryan C. Gordon <icculus@icculus.org>
parents: 558
diff changeset
  1003
            *_len = 0;
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1004
            return NULL;  // we're done!
559
d34ac77da171 Preprocessor should return TOKEN_EOI when we finish the whole include stack.
Ryan C. Gordon <icculus@icculus.org>
parents: 558
diff changeset
  1005
        } // if
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1006
605
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
  1007
        // !!! FIXME: todo.
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
  1008
        // TOKEN_PP_DEFINE,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
  1009
        // TOKEN_PP_IF,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
  1010
        // TOKEN_PP_ELIF,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
  1011
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1012
        const Conditional *cond = state->conditional_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1013
        const int skipping = ((cond != NULL) && (cond->skipping));
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1014
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1015
        Token token = preprocessor_internal_lexer(state);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1016
        if (token == TOKEN_EOI)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1017
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1018
            assert(state->bytes_left == 0);
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1019
            if (state->conditional_stack != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1020
            {
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1021
                unterminated_pp_condition(ctx);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1022
                continue;  // returns an error.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1023
            } // if
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1024
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1025
            pop_source(ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1026
            continue;  // pick up again after parent's #include line.
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1027
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1028
601
bb1484be4e1b Reworked and documented preprocessor tokens.
Ryan C. Gordon <icculus@icculus.org>
parents: 598
diff changeset
  1029
        else if (token == TOKEN_INCOMPLETE_COMMENT)
565
c0718e4595e5 Set an error in the preprocessor if there's an incomplete multiline comment.
Ryan C. Gordon <icculus@icculus.org>
parents: 564
diff changeset
  1030
        {
c0718e4595e5 Set an error in the preprocessor if there's an incomplete multiline comment.
Ryan C. Gordon <icculus@icculus.org>
parents: 564
diff changeset
  1031
            fail(ctx, "Incomplete multiline comment");
598
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
  1032
            continue;  // will return at top of loop.
565
c0718e4595e5 Set an error in the preprocessor if there's an incomplete multiline comment.
Ryan C. Gordon <icculus@icculus.org>
parents: 564
diff changeset
  1033
        } // else if
c0718e4595e5 Set an error in the preprocessor if there's an incomplete multiline comment.
Ryan C. Gordon <icculus@icculus.org>
parents: 564
diff changeset
  1034
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1035
        else if (token == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1036
        {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1037
            handle_pp_ifdef(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1038
            continue;  // get the next thing.
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1039
        } // else if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1040
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1041
        else if (token == TOKEN_PP_IFNDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1042
        {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1043
            handle_pp_ifndef(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1044
            continue;  // get the next thing.
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1045
        } // else if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1046
621
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1047
        else if (token == TOKEN_PP_ENDIF)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1048
        {
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1049
            handle_pp_endif(ctx);
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1050
            continue;  // get the next thing.
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1051
        } // else if
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
  1052
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1053
        else if (token == TOKEN_PP_ELSE)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1054
        {
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1055
            handle_pp_else(ctx);
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1056
            continue;  // get the next thing.
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1057
        } // else if
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
  1058
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1059
        // NOTE: Conditionals must be above (skipping) test.
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1060
        else if (skipping)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1061
            continue;  // just keep dumping tokens until we get end of block.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1062
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1063
        else if (token == TOKEN_PP_INCLUDE)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1064
        {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1065
            handle_pp_include(ctx);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1066
            continue;  // will return error or use new top of include_stack.
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1067
        } // else if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
  1068
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1069
        else if (token == TOKEN_PP_LINE)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1070
        {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1071
            handle_pp_line(ctx);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1072
            continue;  // get the next thing.
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1073
        } // else if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
  1074
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1075
        else if (token == TOKEN_PP_ERROR)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1076
        {
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1077
            handle_pp_error(ctx);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1078
            continue;  // will return at top of loop.
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1079
        } // else if
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
  1080
618
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1081
        else if (token == TOKEN_PP_UNDEF)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1082
        {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1083
            handle_pp_undef(ctx);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1084
            continue;  // will return at top of loop.
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1085
        } // else if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
  1086
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1087
        assert(!skipping);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1088
        *_token = token;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1089
        *_len = (unsigned int) (state->source - state->token);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
  1090
        return state->token;
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
  1091
617
ba0b959daba5 Added a FIXME.
Ryan C. Gordon <icculus@icculus.org>
parents: 615
diff changeset
  1092
        // !!! FIXME: check for ((Token) '\n'), so we know if a preprocessor
ba0b959daba5 Added a FIXME.
Ryan C. Gordon <icculus@icculus.org>
parents: 615
diff changeset
  1093
        // !!! FIXME:  directive started a line.
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1094
    } // while
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1095
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1096
    assert(0 && "shouldn't hit this code");
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1097
    *_token = TOKEN_UNKNOWN;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1098
    *_len = 0;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1099
    return NULL;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1100
} // _preprocessor_nexttoken
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1101
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1102
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1103
const char *preprocessor_nexttoken(Preprocessor *ctx, unsigned int *len,
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1104
                                   Token *token)
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1105
{
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1106
    const char *retval = _preprocessor_nexttoken(ctx, len, token);
587
202354e004fc Unified some cut-and-paste code.
Ryan C. Gordon <icculus@icculus.org>
parents: 586
diff changeset
  1107
    print_debug_token(retval, *len, *token);
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1108
    return retval;
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1109
} // preprocessor_nexttoken
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1110
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1111
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1112
const char *preprocessor_sourcepos(Preprocessor *_ctx, unsigned int *pos)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1113
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1114
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1115
    if (ctx->include_stack == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1116
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1117
        *pos = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1118
        return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1119
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents: