mojoshader_preprocessor.c
author Ryan C. Gordon <icculus@icculus.org>
Sun, 15 Feb 2009 02:46:08 -0500
changeset 629 d886403c6609
parent 628 33da6087aa48
child 630 e6bd53dd1f91
permissions -rw-r--r--
Better debug token output.
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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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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);
587
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        TOKENCASE(TOKEN_EOI);
598
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
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        TOKENCASE(TOKEN_PREPROCESSING_ERROR);
587
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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
d886403c6609 Better debug token output.
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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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   210
    } // 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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   215
        return 0;
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   216
    } // if
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   217
    close(fd);
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    *outdata = data;
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   219
    *outbytes = (unsigned int) statbuf.st_size;
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    return 1;
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   221
#endif
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   222
} // MOJOSHADER_internal_include_open
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   224
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   225
void MOJOSHADER_internal_include_close(const char *data, MOJOSHADER_malloc m,
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                                       MOJOSHADER_free f, void *d)
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   227
{
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   228
    f((void *) data, d);
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   229
} // MOJOSHADER_internal_include_close
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   230
#endif  // !MOJOSHADER_FORCE_INCLUDE_CALLBACKS
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   232
620
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   233
// Conditional pool stuff...
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   234
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   235
static void free_conditional_pool(Context *ctx)
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   236
{
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   237
    Conditional *item = ctx->conditional_pool;
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   238
    while (item != NULL)
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diff changeset
   239
    {
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   240
        Conditional *next = item->next;
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   241
        Free(ctx, item);
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   242
        item = next;
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diff changeset
   243
    } // while
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   244
} // free_conditional_pool
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diff changeset
   245
1c4cf996004e Initial work on preprocessor conditionals.
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   246
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   247
static Conditional *get_conditional(Context *ctx)
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   248
{
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   249
    Conditional *retval = ctx->conditional_pool;
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diff changeset
   250
    if (retval != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   251
        ctx->conditional_pool = retval->next;
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diff changeset
   252
    else
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   253
        retval = (Conditional *) Malloc(ctx, sizeof (Conditional));
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diff changeset
   254
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   255
    if (retval != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   256
        memset(retval, '\0', sizeof (Conditional));
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diff changeset
   257
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diff changeset
   258
    return retval;
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diff changeset
   259
} // get_conditional
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diff changeset
   260
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diff changeset
   261
1c4cf996004e Initial work on preprocessor conditionals.
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   262
static void put_conditionals(Context *ctx, Conditional *item)
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diff changeset
   263
{
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diff changeset
   264
    while (item != NULL)
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diff changeset
   265
    {
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diff changeset
   266
        Conditional *next = item->next;
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   267
        item->next = ctx->conditional_pool;
1c4cf996004e Initial work on preprocessor conditionals.
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diff changeset
   268
        ctx->conditional_pool = item;
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diff changeset
   269
        item = next;
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diff changeset
   270
    } // while
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diff changeset
   271
} // put_conditionals
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   272
611
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   273
555
940821555fda Initial work on preprocessor. Not yet complete!
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parents:
diff changeset
   274
// Preprocessor define hashtable stuff...
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diff changeset
   275
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   276
static unsigned char hash_define(const char *sym)
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diff changeset
   277
{
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diff changeset
   278
    unsigned char retval = 0;
622
59b3003f6494 Fixed logic bug in string loop.
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diff changeset
   279
    while (*sym)
555
940821555fda Initial work on preprocessor. Not yet complete!
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diff changeset
   280
        retval += *(sym++);
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diff changeset
   281
    return retval;
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diff changeset
   282
} // hash_define
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940821555fda Initial work on preprocessor. Not yet complete!
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static int add_define(Context *ctx, const char *sym, const char *val)
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{
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    char *identifier = NULL;
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    char *definition = NULL;
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    const unsigned char hash = hash_define(sym);
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    DefineHash *bucket = ctx->define_hashtable[hash];
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   291
    while (bucket)
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   292
    {
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   293
        if (strcmp(bucket->define.identifier, sym) == 0)
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   294
        {
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            failf(ctx, "'%s' already defined", sym);
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   296
            return 0;
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   297
        } // if
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        bucket = bucket->next;
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   299
    } // while
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   300
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    bucket = (DefineHash *) Malloc(ctx, sizeof (DefineHash));
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   302
    if (bucket == NULL)
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   303
        return 0;
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   304
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   305
    identifier = (char *) Malloc(ctx, strlen(sym) + 1);
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    definition = (char *) Malloc(ctx, strlen(val) + 1);
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   307
    if ((identifier == NULL) || (definition == NULL))
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   308
    {
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   309
        Free(ctx, identifier);
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        Free(ctx, definition);
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   311
        Free(ctx, bucket);
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        return 0;
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   313
    } // if
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   314
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   315
    strcpy(identifier, sym);
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   316
    strcpy(definition, val);
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   317
    bucket->define.identifier = identifier;
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   318
    bucket->define.definition = definition;
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   319
    bucket->next = ctx->define_hashtable[hash];
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   320
    ctx->define_hashtable[hash] = bucket;
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   321
    return 1;
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   322
} // add_define
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   323
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   324
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   325
static int remove_define(Context *ctx, const char *sym)
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   326
{
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   327
    const unsigned char hash = hash_define(sym);
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   328
    DefineHash *bucket = ctx->define_hashtable[hash];
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   329
    DefineHash *prev = NULL;
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   330
    while (bucket)
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   331
    {
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   332
        if (strcmp(bucket->define.identifier, sym) == 0)
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   333
        {
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   334
            if (prev == NULL)
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   335
                ctx->define_hashtable[hash] = bucket->next;
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   336
            else
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   337
                prev->next = bucket->next;
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   338
            Free(ctx, (void *) bucket->define.identifier);
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   339
            Free(ctx, (void *) bucket->define.definition);
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   340
            Free(ctx, bucket);
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   341
            return 1;
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   342
        } // if
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   343
        prev = bucket;
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   344
        bucket = bucket->next;
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   345
    } // while
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   346
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   347
    return 0;
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   348
} // remove_define
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   349
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   350
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   351
static const char *find_define(Context *ctx, const char *sym)
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   352
{
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   353
    const unsigned char hash = hash_define(sym);
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   354
    DefineHash *bucket = ctx->define_hashtable[hash];
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diff changeset
   355
    while (bucket)
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   356
    {
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   357
        if (strcmp(bucket->define.identifier, sym) == 0)
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   358
            return bucket->define.definition;
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diff changeset
   359
        bucket = bucket->next;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   360
    } // while
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diff changeset
   361
    return NULL;
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   362
} // find_define
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diff changeset
   363
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diff changeset
   364
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   365
static void free_all_defines(Context *ctx)
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diff changeset
   366
{
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diff changeset
   367
    int i;
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diff changeset
   368
    for (i = 0; i < STATICARRAYLEN(ctx->define_hashtable); i++)
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parents:
diff changeset
   369
    {
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diff changeset
   370
        DefineHash *bucket = ctx->define_hashtable[i];
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diff changeset
   371
        ctx->define_hashtable[i] = NULL;
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parents:
diff changeset
   372
        while (bucket)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   373
        {
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diff changeset
   374
            DefineHash *next = bucket->next;
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diff changeset
   375
            Free(ctx, (void *) bucket->define.identifier);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   376
            Free(ctx, (void *) bucket->define.definition);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   377
            Free(ctx, bucket);
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   378
            bucket = next;
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diff changeset
   379
        } // while
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parents:
diff changeset
   380
    } // for
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   381
} // find_define
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parents:
diff changeset
   382
940821555fda Initial work on preprocessor. Not yet complete!
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diff changeset
   383
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   384
// filename cache stuff...
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   385
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   386
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
   387
{
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   388
    if (fname == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   389
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   390
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   391
    // !!! 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
   392
    FilenameCache *item = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   393
    while (item != NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   394
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   395
        if (strcmp(item->filename, fname) == 0)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   396
            return item->filename;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   397
        item = item->next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   398
    } // while
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   399
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   400
    // new cache item.
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   401
    item = (FilenameCache *) Malloc(ctx, sizeof (FilenameCache));
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   402
    if (item == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   403
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   404
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   405
    item->filename = StrDup(ctx, fname);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   406
    if (item->filename == NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   407
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   408
        Free(ctx, item);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   409
        return NULL;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   410
    } // if
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   411
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   412
    item->next = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   413
    ctx->filename_cache = item;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   414
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   415
    return item->filename;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   416
} // cache_filename
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   417
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   418
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   419
static void free_filename_cache(Context *ctx)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   420
{
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   421
    FilenameCache *item = ctx->filename_cache;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   422
    while (item != NULL)
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   423
    {
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   424
        FilenameCache *next = item->next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   425
        Free(ctx, item->filename);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   426
        Free(ctx, item);
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   427
        item = next;
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   428
    } // while
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   429
} // free_filename_cache
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   430
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   431
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   432
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
   433
                       unsigned int srclen, int included)
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
    IncludeState *state = (IncludeState *) Malloc(ctx, sizeof (IncludeState));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   436
    if (state == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   437
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   438
    memset(state, '\0', sizeof (IncludeState));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   439
560
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   440
    if (fname != NULL)
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   441
    {
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   442
        state->filename = cache_filename(ctx, fname);
560
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   443
        if (state->filename == NULL)
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   444
        {
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   445
            Free(ctx, state);
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   446
            return 0;
225d579ae929 Handle NULL file names.
Ryan C. Gordon <icculus@icculus.org>
parents: 559
diff changeset
   447
        } // if
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   448
    } // if
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
    state->included = included;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   451
    state->source_base = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   452
    state->source = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   453
    state->token = source;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   454
    state->bytes_left = srclen;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   455
    state->line = 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   456
    state->next = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   457
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   458
    ctx->include_stack = state;
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
    return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   461
} // push_source
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   462
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   463
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   464
static void pop_source(Context *ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   465
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   466
    IncludeState *state = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   467
    if (state == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   468
        return;
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
    if (state->included)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   471
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   472
        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
   473
                            ctx->free, ctx->malloc_data);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   474
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   475
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   476
    // 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
   477
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   478
    put_conditionals(ctx, state->conditional_stack);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   479
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   480
    ctx->include_stack = state->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   481
    Free(ctx, state);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   482
} // pop_source
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   483
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   484
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   485
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
   486
                            unsigned int sourcelen,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   487
                            MOJOSHADER_includeOpen open_callback,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   488
                            MOJOSHADER_includeClose close_callback,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   489
                            const MOJOSHADER_preprocessorDefine **defines,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   490
                            unsigned int define_count,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   491
                            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
   492
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   493
    int okay = 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   494
    int i = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   495
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   496
    // 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
   497
    assert(m != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   498
    assert(f != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   499
    assert(open_callback != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   500
    assert(close_callback != NULL);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   501
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   502
    Context *ctx = (Context *) m(sizeof (Context), d);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   503
    if (ctx == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   504
        return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   505
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   506
    memset(ctx, '\0', sizeof (Context));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   507
    ctx->malloc = m;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   508
    ctx->free = f;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   509
    ctx->malloc_data = d;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   510
    ctx->open_callback = open_callback;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   511
    ctx->close_callback = close_callback;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   512
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   513
    for (i = 0; i < define_count; i++)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   514
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   515
        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
   516
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   517
            okay = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   518
            break;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   519
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   520
    } // for
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   521
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   522
    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
   523
        okay = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   524
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   525
    if (!okay)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   526
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   527
        preprocessor_end((Preprocessor *) ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   528
        return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   529
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   530
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   531
    return (Preprocessor *) ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   532
} // preprocessor_start
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   533
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   534
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   535
void preprocessor_end(Preprocessor *_ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   536
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   537
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   538
    if (ctx == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   539
        return;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   540
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   541
    while (ctx->include_stack != NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   542
        pop_source(ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   543
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   544
    free_all_defines(ctx);
612
72ccfe69eaf1 Moved filename caching into the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 611
diff changeset
   545
    free_filename_cache(ctx);
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   546
    free_conditional_pool(ctx);
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   547
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   548
    Free(ctx, ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   549
} // preprocessor_end
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   550
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   551
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   552
int preprocessor_outofmemory(Preprocessor *_ctx)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   553
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   554
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   555
    return ctx->out_of_memory;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   556
} // preprocessor_outofmemory
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   557
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   558
627
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   559
// !!! FIXME: (almost?) all preprocessor directives can end a line with a
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   560
// !!! FIXME:  '\\' to continue to the next line.
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   561
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   562
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   563
static int require_newline(IncludeState *state)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   564
{
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   565
    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
   566
    const unsigned int linenum = state->line;
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   567
    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
   568
    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
   569
    state->line = linenum;
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   570
    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
   571
        return 1; // call it an eol.
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   572
    return ( (token == ((Token) '\n')) || (token == TOKEN_EOI) );
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   573
} // require_newline
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   574
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   575
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   576
static void handle_pp_include(Context *ctx)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   577
{
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   578
    IncludeState *state = ctx->include_stack;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   579
    Token token = preprocessor_internal_lexer(state);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   580
    MOJOSHADER_includeType incltype;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   581
    char *filename = NULL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   582
    int bogus = 0;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   583
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   584
    if (token == TOKEN_STRING_LITERAL)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   585
        incltype = MOJOSHADER_INCLUDETYPE_LOCAL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   586
    else if (token == ((Token) '<'))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   587
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   588
        incltype = MOJOSHADER_INCLUDETYPE_SYSTEM;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   589
        // 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
   590
        //  considered part of the filename.  :/
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   591
        while (!bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   592
        {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   593
            if ( !(bogus = (state->bytes_left == 0)) )
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   594
            {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   595
                const char ch = *state->source;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   596
                if ( !(bogus = ((ch == '\r') || (ch == '\n'))) )
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   597
                {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   598
                    state->source++;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   599
                    state->bytes_left--;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   600
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   601
                    if (ch == '>')
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   602
                        break;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   603
                } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   604
            } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   605
        } // while
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   606
    } // else if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   607
    else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   608
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   609
        bogus = 1;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   610
    } // else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   612
    if (!bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   613
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   614
        state->token++;  // skip '<' or '\"'...
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   615
        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
   616
        filename = (char *) alloca(len);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   617
        memcpy(filename, state->token, len-1);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   618
        filename[len-1] = '\0';
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   619
        bogus = !require_newline(state);
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   620
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   621
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   622
    if (bogus)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   623
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   624
        fail(ctx, "Invalid #include directive");
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   625
        return;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   626
    } // else
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   627
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   628
    const char *newdata = NULL;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   629
    unsigned int newbytes = 0;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   630
    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
   631
                            &newdata, &newbytes, ctx->malloc,
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   632
                            ctx->free, ctx->malloc_data))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   633
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   634
        fail(ctx, "Include callback failed");  // !!! FIXME: better error
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   635
        return;
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   636
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   637
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   638
    if (!push_source(ctx, filename, newdata, newbytes, 1))
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   639
    {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   640
        assert(ctx->out_of_memory);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   641
        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
   642
    } // if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   643
} // handle_pp_include
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   644
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   645
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   646
static void handle_pp_line(Context *ctx)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   647
{
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   648
    IncludeState *state = ctx->include_stack;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   649
    char *filename = NULL;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   650
    int linenum = 0;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   651
    int bogus = 0;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   652
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   653
    if (preprocessor_internal_lexer(state) != TOKEN_INT_LITERAL)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   654
        bogus = 1;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   655
    else
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   656
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   657
        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
   658
        char *buf = (char *) alloca(len+1);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   659
        memcpy(buf, state->token, len);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   660
        buf[len] = '\0';
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   661
        linenum = atoi(buf);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   662
    } // else
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
    if (!bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   665
        bogus = (preprocessor_internal_lexer(state) != TOKEN_STRING_LITERAL);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   666
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   667
    if (!bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   668
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   669
        state->token++;  // skip '\"'...
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   670
        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
   671
        filename = (char *) alloca(len);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   672
        memcpy(filename, state->token, len-1);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   673
        filename[len-1] = '\0';
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   674
        bogus = !require_newline(state);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   675
    } // if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   676
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   677
    if (bogus)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   678
    {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   679
        fail(ctx, "Invalid #line directive");
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   680
        return;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   681
    } // if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   682
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   683
    const char *cached = cache_filename(ctx, filename);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   684
    assert((cached != NULL) || (ctx->out_of_memory));
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   685
    state->filename = cached;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   686
    state->line = linenum;
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   687
} // handle_pp_line
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   688
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   689
627
166c4ad7126b Added some FIXMEs.
Ryan C. Gordon <icculus@icculus.org>
parents: 626
diff changeset
   690
// !!! 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
   691
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
   692
{
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   693
    IncludeState *state = ctx->include_stack;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   694
    const char *data = NULL;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   695
    int done = 0;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   696
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   697
    const char *source = NULL;
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   698
    while (!done)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   699
    {
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   700
        source = state->source;
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   701
        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
   702
        switch (token)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   703
        {
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   704
            case ((Token) '\n'):
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   705
                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
   706
                // fall through!
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   707
            case TOKEN_INCOMPLETE_COMMENT:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   708
            case TOKEN_EOI:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   709
                done = 1;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   710
                break;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   711
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   712
            default:
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   713
                if (data == NULL)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   714
                    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
   715
                break;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   716
        } // switch
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   717
    } // while
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   718
615
5467d19b4d7d Fix line numbers in #error preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 614
diff changeset
   719
    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
   720
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   721
    const char *prefix = "#error ";
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   722
    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
   723
    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
   724
    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
   725
    strcpy(ctx->failstr, prefix);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   726
    if (cpy > 0)
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   727
        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
   728
    ctx->failstr[cpy + prefixlen] = '\0';
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   729
    ctx->isfail = 1;
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   730
} // handle_pp_error
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   731
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   732
618
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   733
static void handle_pp_undef(Context *ctx)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   734
{
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   735
    IncludeState *state = ctx->include_stack;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   736
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   737
    if (preprocessor_internal_lexer(state) != TOKEN_IDENTIFIER)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   738
    {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   739
        fail(ctx, "Macro names must be indentifiers");
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   740
        return;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   741
    } // if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   742
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   743
    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
   744
    char *sym = (char *) alloca(len);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   745
    memcpy(sym, state->token, len-1);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   746
    sym[len-1] = '\0';
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   747
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   748
    if (!require_newline(state))
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   749
    {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   750
        fail(ctx, "Invalid #undef directive");
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   751
        return;
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   752
    } // if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   753
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   754
    remove_define(ctx, sym);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   755
} // handle_pp_undef
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   756
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   757
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   758
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
   759
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   760
    IncludeState *state = ctx->include_stack;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   761
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   762
    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
   763
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   764
    if (preprocessor_internal_lexer(state) != TOKEN_IDENTIFIER)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   765
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   766
        fail(ctx, "Macro names must be indentifiers");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   767
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   768
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   769
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   770
    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
   771
    char *sym = (char *) alloca(len);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   772
    memcpy(sym, state->token, len-1);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   773
    sym[len-1] = '\0';
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   774
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   775
    if (!require_newline(state))
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   776
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   777
        if (type == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   778
            fail(ctx, "Invalid #ifdef directive");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   779
        else
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   780
            fail(ctx, "Invalid #ifndef directive");
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   781
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   782
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   783
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   784
    Conditional *conditional = get_conditional(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   785
    assert((conditional != NULL) || (ctx->out_of_memory));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   786
    if (conditional == NULL)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   787
        return NULL;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   788
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   789
    Conditional *prev = state->conditional_stack;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   790
    int skipping = ((prev != NULL) && (prev->skipping));
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   791
    if (!skipping)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   792
    {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   793
        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
   794
        if (type == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   795
            skipping = !found;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   796
        else
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   797
            skipping = found;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   798
    } // if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   799
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   800
    conditional->type = type;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   801
    conditional->linenum = state->line - 1;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   802
    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
   803
    conditional->chosen = !skipping;
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   804
    conditional->next = prev;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   805
    state->conditional_stack = conditional;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   806
    return conditional;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   807
} // _handle_pp_ifdef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   808
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   809
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   810
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
   811
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   812
    _handle_pp_ifdef(ctx, TOKEN_PP_IFDEF);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   813
} // handle_pp_ifdef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   814
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   815
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   816
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
   817
{
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   818
    _handle_pp_ifdef(ctx, TOKEN_PP_IFNDEF);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   819
} // handle_pp_ifndef
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   820
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   821
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   822
static inline void handle_pp_else(Context *ctx)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   823
{
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   824
    IncludeState *state = ctx->include_stack;
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   825
    Conditional *cond = state->conditional_stack;
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   826
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   827
    if (!require_newline(state))
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   828
        fail(ctx, "Invalid #else directive");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   829
    else if (cond == NULL)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   830
        fail(ctx, "#else without #if");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   831
    else if (cond->type == TOKEN_PP_ELSE)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   832
        fail(ctx, "#else after #else");
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   833
    else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   834
    {
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   835
        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
   836
        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
   837
        if (!cond->chosen)
bfb4016d9404 Fixed #else preprocessor directive so it'll work with #elif.
Ryan C. Gordon <icculus@icculus.org>
parents: 624
diff changeset
   838
            cond->chosen = 1;
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   839
    } // else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   840
} // handle_pp_else
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   841
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   842
621
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   843
static void handle_pp_endif(Context *ctx)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   844
{
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   845
    IncludeState *state = ctx->include_stack;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   846
    Conditional *cond = state->conditional_stack;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   847
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   848
    if (!require_newline(state))
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   849
        fail(ctx, "Invalid #endif directive");
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   850
    else if (cond == NULL)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   851
        fail(ctx, "Unmatched #endif");
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   852
    else
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   853
    {
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   854
        state->conditional_stack = cond->next;  // pop it.
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   855
        cond->next = NULL;
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   856
        put_conditionals(ctx, cond);
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   857
    } // else
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   858
} // handle_pp_endif
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   859
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   860
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   861
static void unterminated_pp_condition(Context *ctx)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   862
{
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   863
    IncludeState *state = ctx->include_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   864
    Conditional *cond = state->conditional_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   865
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   866
    // !!! 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
   867
    switch (cond->type)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   868
    {
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   869
        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
   870
        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
   871
        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
   872
        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
   873
        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
   874
        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
   875
    } // switch
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   876
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   877
    // 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
   878
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   879
    state->conditional_stack = cond->next;  // pop it.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   880
    cond->next = NULL;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   881
    put_conditionals(ctx, cond);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   882
} // unterminated_pp_condition
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   883
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   884
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   885
static inline const char *_preprocessor_nexttoken(Preprocessor *_ctx,
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   886
                                             unsigned int *_len, Token *_token)
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   887
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   888
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   889
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   890
    while (1)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   891
    {
598
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   892
        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
   893
        {
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   894
            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
   895
            *_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
   896
            *_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
   897
            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
   898
        } // if
decc32dc03a7 Removed preprocessor_error(). Returns a Token to specify an error state now.
Ryan C. Gordon <icculus@icculus.org>
parents: 597
diff changeset
   899
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   900
        IncludeState *state = ctx->include_stack;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   901
        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
   902
        {
d34ac77da171 Preprocessor should return TOKEN_EOI when we finish the whole include stack.
Ryan C. Gordon <icculus@icculus.org>
parents: 558
diff changeset
   903
            *_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
   904
            *_len = 0;
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   905
            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
   906
        } // if
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   907
605
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
   908
        // !!! FIXME: todo.
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
   909
        // TOKEN_PP_DEFINE,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
   910
        // TOKEN_PP_IF,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
   911
        // TOKEN_PP_ELIF,
197c9f2999b7 Added some TODOs for the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 604
diff changeset
   912
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   913
        const Conditional *cond = state->conditional_stack;
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   914
        const int skipping = ((cond != NULL) && (cond->skipping));
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   915
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   916
        Token token = preprocessor_internal_lexer(state);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   917
        if (token == TOKEN_EOI)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   918
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   919
            assert(state->bytes_left == 0);
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   920
            if (state->conditional_stack != NULL)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   921
            {
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   922
                unterminated_pp_condition(ctx);
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   923
                continue;  // returns an error.
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   924
            } // if
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   925
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   926
            pop_source(ctx);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   927
            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
   928
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   929
601
bb1484be4e1b Reworked and documented preprocessor tokens.
Ryan C. Gordon <icculus@icculus.org>
parents: 598
diff changeset
   930
        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
   931
        {
c0718e4595e5 Set an error in the preprocessor if there's an incomplete multiline comment.
Ryan C. Gordon <icculus@icculus.org>
parents: 564
diff changeset
   932
            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
   933
            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
   934
        } // 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
   935
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   936
        else if (token == TOKEN_PP_IFDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   937
        {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   938
            handle_pp_ifdef(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   939
            continue;  // get the next thing.
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   940
        } // else if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   941
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   942
        else if (token == TOKEN_PP_IFNDEF)
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   943
        {
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   944
            handle_pp_ifndef(ctx);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   945
            continue;  // get the next thing.
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   946
        } // else if
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   947
621
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   948
        else if (token == TOKEN_PP_ENDIF)
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   949
        {
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   950
            handle_pp_endif(ctx);
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   951
            continue;  // get the next thing.
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   952
        } // else if
bbeb13128ddb Implemented #endif preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 620
diff changeset
   953
624
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   954
        else if (token == TOKEN_PP_ELSE)
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   955
        {
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   956
            handle_pp_else(ctx);
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   957
            continue;  // get the next thing.
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   958
        } // else if
99d1cf8a18a3 Implemented #else preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 623
diff changeset
   959
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   960
        // NOTE: Conditionals must be above (skipping) test.
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   961
        else if (skipping)
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   962
            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
   963
611
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   964
        else if (token == TOKEN_PP_INCLUDE)
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   965
        {
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   966
            handle_pp_include(ctx);
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   967
            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
   968
        } // else if
8c2ee1a97ee1 Implemented #include in the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 607
diff changeset
   969
614
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   970
        else if (token == TOKEN_PP_LINE)
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   971
        {
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   972
            handle_pp_line(ctx);
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   973
            continue;  // get the next thing.
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   974
        } // else if
0f2f298003ae Implemented #line preprocessor directive.
Ryan C. Gordon <icculus@icculus.org>
parents: 612
diff changeset
   975
606
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   976
        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
   977
        {
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   978
            handle_pp_error(ctx);
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   979
            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
   980
        } // else if
63e7a66ac320 Added support for #error directive to the preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 605
diff changeset
   981
618
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   982
        else if (token == TOKEN_PP_UNDEF)
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   983
        {
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   984
            handle_pp_undef(ctx);
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   985
            continue;  // will return at top of loop.
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   986
        } // else if
83302ac1b9f4 Added #undef directive to preprocessor.
Ryan C. Gordon <icculus@icculus.org>
parents: 617
diff changeset
   987
623
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   988
        assert(!skipping);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   989
        *_token = token;
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   990
        *_len = (unsigned int) (state->source - state->token);
899d7618efef Implemented #ifdef and #ifndef preprocessor directives.
Ryan C. Gordon <icculus@icculus.org>
parents: 622
diff changeset
   991
        return state->token;
620
1c4cf996004e Initial work on preprocessor conditionals.
Ryan C. Gordon <icculus@icculus.org>
parents: 618
diff changeset
   992
617
ba0b959daba5 Added a FIXME.
Ryan C. Gordon <icculus@icculus.org>
parents: 615
diff changeset
   993
        // !!! 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
   994
        // !!! FIXME:  directive started a line.
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   995
    } // while
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   996
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   997
    assert(0 && "shouldn't hit this code");
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   998
    *_token = TOKEN_UNKNOWN;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
   999
    *_len = 0;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1000
    return NULL;
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1001
} // _preprocessor_nexttoken
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1002
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1003
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1004
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
  1005
                                   Token *token)
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1006
{
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1007
    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
  1008
    print_debug_token(retval, *len, *token);
561
0d2535cc5ac3 Added basic lexer debug output.
Ryan C. Gordon <icculus@icculus.org>
parents: 560
diff changeset
  1009
    return retval;
555
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1010
} // preprocessor_nexttoken
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1011
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1012
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1013
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
  1014
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1015
    Context *ctx = (Context *) _ctx;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1016
    if (ctx->include_stack == NULL)
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
        *pos = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1019
        return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1020
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1021
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1022
    *pos = ctx->include_stack->line;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1023
    return ctx->include_stack->filename;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1024
} // preprocessor_sourcepos
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1025
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1026
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1027
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1028
#define BUFFER_LEN (64 * 1024)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1029
typedef struct BufferList
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1030
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1031
    char buffer[BUFFER_LEN];
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1032
    size_t bytes;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1033
    struct BufferList *next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1034
} BufferList;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1035
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1036
typedef struct Buffer
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1037
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1038
    size_t total_bytes;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1039
    BufferList head;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1040
    BufferList *tail;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1041
} Buffer;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1042
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1043
static void buffer_init(Buffer *buffer)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1044
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1045
    buffer->total_bytes = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1046
    buffer->head.bytes = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1047
    buffer->head.next = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1048
    buffer->tail = &buffer->head;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1049
} // buffer_init
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1050
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1051
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1052
static int add_to_buffer(Buffer *buffer, const char *data,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1053
                         size_t len, MOJOSHADER_malloc m, void *d)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1054
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1055
    buffer->total_bytes += len;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1056
    while (len > 0)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1057
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1058
        const size_t avail = BUFFER_LEN - buffer->tail->bytes;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1059
        const size_t cpy = (avail > len) ? len : avail;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1060
        memcpy(buffer->tail->buffer + buffer->tail->bytes, data, cpy);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1061
        len -= cpy;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1062
        data += cpy;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1063
        buffer->tail->bytes += cpy;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1064
        assert(buffer->tail->bytes <= BUFFER_LEN);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1065
        if (buffer->tail->bytes == BUFFER_LEN)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1066
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1067
            BufferList *item = (BufferList *) m(sizeof (BufferList), d);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1068
            if (item == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1069
                return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1070
            item->bytes = 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1071
            item->next = NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1072
            buffer->tail->next = item;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1073
            buffer->tail = item;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1074
        } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1075
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1076
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1077
    return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1078
} // add_to_buffer
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1079
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1080
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1081
static int indent_buffer(Buffer *buffer, int n, int newline,
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1082
                         MOJOSHADER_malloc m, void *d)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1083
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1084
    static char spaces[4] = { ' ', ' ', ' ', ' ' };
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1085
    if (newline)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1086
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1087
        while (n--)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1088
        {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1089
            if (!add_to_buffer(buffer, spaces, sizeof (spaces), m, d))
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1090
                return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1091
        } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1092
    } // if
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1093
    else
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1094
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1095
        if (!add_to_buffer(buffer, spaces, 1, m, d))
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1096
            return 0;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1097
    } // else
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1098
    return 1;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1099
} // indent_buffer
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1100
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1101
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1102
static char *flatten_buffer(Buffer *buffer, MOJOSHADER_malloc m, void *d)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1103
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1104
    char *retval = m(buffer->total_bytes + 1, d);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1105
    if (retval == NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1106
        return NULL;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1107
    BufferList *item = &buffer->head;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1108
    char *ptr = retval;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1109
    while (item != NULL)
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
        BufferList *next = item->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1112
        memcpy(ptr, item->buffer, item->bytes);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1113
        ptr += item->bytes;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1114
        item = next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1115
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1116
    *ptr = '\0';
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1117
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1118
    assert(ptr == (retval + buffer->total_bytes));
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1119
    return retval;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1120
} // flatten_buffer
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1121
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1122
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1123
static void free_buffer(Buffer *buffer, MOJOSHADER_free f, void *d)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1124
{
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1125
    // head is statically allocated, so start with head.next...
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1126
    BufferList *item = buffer->head.next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1127
    while (item != NULL)
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1128
    {
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1129
        BufferList *next = item->next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1130
        f(item, d);
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1131
        item = next;
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1132
    } // while
940821555fda Initial work on preprocessor. Not yet complete!
Ryan C. Gordon <icculu