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mojoshader_compiler.c
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/**
* MojoShader; generate shader programs from bytecode of compiled
* Direct3D shaders.
*
* Please see the file LICENSE.txt in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
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// !!! FIXME: this needs to be split into separate source files:
// !!! FIXME: parse, AST, IR, etc. The problem is we need to deal with the
// !!! FIXME: "Context" struct being passed around everywhere.
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#define __MOJOSHADER_INTERNAL__ 1
#include "mojoshader_internal.h"
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#if DEBUG_COMPILER_PARSER
#define LEMON_SUPPORT_TRACING 1
#endif
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// !!! FIXME: I'd like to lose this. It's really inefficient. Just keep a
// !!! FIXME: (tail) on these list structures instead?
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#define REVERSE_LINKED_LIST(typ, head) { \
if ((head) && (head->next)) { \
typ *tmp = NULL; \
typ *tmp1 = NULL; \
while (head != NULL) { \
tmp = head; \
head = head->next; \
tmp->next = tmp1; \
tmp1 = tmp; \
} \
head = tmp; \
} \
}
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static inline int operator_is_unary(const MOJOSHADER_astNodeType op)
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{
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return ( (op > MOJOSHADER_AST_OP_START_RANGE_UNARY) &&
(op < MOJOSHADER_AST_OP_END_RANGE_UNARY) );
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} // operator_is_unary
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static inline int operator_is_binary(const MOJOSHADER_astNodeType op)
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{
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return ( (op > MOJOSHADER_AST_OP_START_RANGE_BINARY) &&
(op < MOJOSHADER_AST_OP_END_RANGE_BINARY) );
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} // operator_is_binary
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static inline int operator_is_ternary(const MOJOSHADER_astNodeType op)
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{
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return ( (op > MOJOSHADER_AST_OP_START_RANGE_TERNARY) &&
(op < MOJOSHADER_AST_OP_END_RANGE_TERNARY) );
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} // operator_is_ternary
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typedef union TokenData
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{
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int64 i64;
double dbl;
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const char *string;
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const MOJOSHADER_astDataType *datatype;
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} TokenData;
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// This tracks data types and variables, and notes when they enter/leave scope.
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typedef struct SymbolScope
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{
const char *symbol;
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const MOJOSHADER_astDataType *datatype;
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int index; // unique positive value within a function, negative if global.
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int referenced; // non-zero if something looked for this symbol (so we know it's used).
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struct SymbolScope *next;
} SymbolScope;
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typedef struct SymbolMap
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{
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HashTable *hash;
SymbolScope *scope;
} SymbolMap;
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typedef struct LoopLabels
{
int start; // loop's start label during IR build.
int end; // loop's end label during IR build.
struct LoopLabels *prev;
} LoopLabels;
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// Compile state, passed around all over the place.
typedef struct Context
{
int isfail;
int out_of_memory;
MOJOSHADER_malloc malloc;
MOJOSHADER_free free;
void *malloc_data;
ErrorList *errors;
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ErrorList *warnings;
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StringCache *strcache;
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const char *sourcefile; // current source file that we're parsing.
unsigned int sourceline; // current line in sourcefile that we're parsing.
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SymbolMap usertypes;
SymbolMap variables;
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MOJOSHADER_astNode *ast; // Abstract Syntax Tree
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const char *source_profile;
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int is_func_scope; // non-zero if semantic analysis is in function scope.
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int loop_count;
int switch_count;
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int var_index; // next variable index for current function.
int global_var_index; // next variable index for global scope.
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int user_func_index; // next function index for user-defined functions.
int intrinsic_func_index; // next function index for intrinsic functions.
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MOJOSHADER_irStatement **ir; // intermediate representation.
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int ir_label_count; // next unused IR label index.
int ir_temp_count; // next unused IR temporary value index.
int ir_end; // current function's end label during IR build.
int ir_ret; // temp that holds current function's retval during IR build.
LoopLabels *ir_loop; // nested loop boundary labels during IR build.
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// Cache intrinsic types for fast lookup and consistent pointer values.
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MOJOSHADER_astDataType dt_none;
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MOJOSHADER_astDataType dt_bool;
MOJOSHADER_astDataType dt_int;
MOJOSHADER_astDataType dt_uint;
MOJOSHADER_astDataType dt_float;
MOJOSHADER_astDataType dt_float_snorm;
MOJOSHADER_astDataType dt_float_unorm;
MOJOSHADER_astDataType dt_half;
MOJOSHADER_astDataType dt_double;
MOJOSHADER_astDataType dt_string;
MOJOSHADER_astDataType dt_sampler1d;
MOJOSHADER_astDataType dt_sampler2d;
MOJOSHADER_astDataType dt_sampler3d;
MOJOSHADER_astDataType dt_samplercube;
MOJOSHADER_astDataType dt_samplerstate;
MOJOSHADER_astDataType dt_samplercompstate;
MOJOSHADER_astDataType dt_buf_bool;
MOJOSHADER_astDataType dt_buf_int;
MOJOSHADER_astDataType dt_buf_uint;
MOJOSHADER_astDataType dt_buf_half;
MOJOSHADER_astDataType dt_buf_float;
MOJOSHADER_astDataType dt_buf_double;
MOJOSHADER_astDataType dt_buf_float_snorm;
MOJOSHADER_astDataType dt_buf_float_unorm;
Buffer *garbage; // this is sort of hacky.
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} Context;
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// !!! FIXME: cut and paste between every damned source file follows...
// !!! FIXME: We need to make some sort of ContextBase that applies to all
// !!! FIXME: files and move this stuff to mojoshader_common.c ...
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// Convenience functions for allocators...
static inline void out_of_memory(Context *ctx)
{
ctx->isfail = ctx->out_of_memory = 1;
} // out_of_memory
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static char zeromalloc = 0;
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static inline void *Malloc(Context *ctx, const size_t len)
{
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void *retval = (len == 0) ? &zeromalloc : ctx->malloc((int) len, ctx->malloc_data);
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if (retval == NULL)
out_of_memory(ctx);
return retval;
} // Malloc
static inline char *StrDup(Context *ctx, const char *str)
{
char *retval = (char *) Malloc(ctx, strlen(str) + 1);
if (retval != NULL)
strcpy(retval, str);
return retval;
} // StrDup
static inline void Free(Context *ctx, void *ptr)
{
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if ((ptr != &zeromalloc) && (ptr != NULL))
ctx->free(ptr, ctx->malloc_data);
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} // Free
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static void *MallocBridge(int bytes, void *data)
{
return Malloc((Context *) data, (size_t) bytes);
} // MallocBridge
static void FreeBridge(void *ptr, void *data)
{
Free((Context *) data, ptr);
} // FreeBridge
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static void failf(Context *ctx, const char *fmt, ...) ISPRINTF(2,3);
static void failf(Context *ctx, const char *fmt, ...)
{
ctx->isfail = 1;
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if (ctx->out_of_memory)
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return;
va_list ap;
va_start(ap, fmt);
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errorlist_add_va(ctx->errors, ctx->sourcefile, ctx->sourceline, fmt, ap);
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va_end(ap);
} // failf
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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static void warnf(Context *ctx, const char *fmt, ...) ISPRINTF(2,3);
static void warnf(Context *ctx, const char *fmt, ...)
{
if (ctx->out_of_memory)
return;
va_list ap;
va_start(ap, fmt);
errorlist_add_va(ctx->warnings, ctx->sourcefile, ctx->sourceline, fmt, ap);
va_end(ap);
} // warnf
static inline void warn(Context *ctx, const char *reason)
{
warnf(ctx, "%s", reason);
} // warn
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static inline int isfail(const Context *ctx)
{
return ctx->isfail;
} // isfail
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static void symbolmap_nuke(const void *k, const void *v, void *d) {/*no-op*/}
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static int create_symbolmap(Context *ctx, SymbolMap *map)
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{
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// !!! FIXME: should compare string pointer, with string in cache.
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map->scope = NULL;
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map->hash = hash_create(ctx, hash_hash_string, hash_keymatch_string,
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symbolmap_nuke, 1, MallocBridge, FreeBridge, ctx);
return (map->hash != NULL);
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} // create_symbolmap
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static int datatypes_match(const MOJOSHADER_astDataType *a,
const MOJOSHADER_astDataType *b)
{
int i;
if (a == b)
return 1;
else if (a->type != b->type)
return 0;
switch (a->type)
{
case MOJOSHADER_AST_DATATYPE_STRUCT:
if (a->structure.member_count != b->structure.member_count)
return 0;
for (i = 0; i < a->structure.member_count; i++)
{
if (!datatypes_match(a->structure.members[i].datatype,
b->structure.members[i].datatype))
return 0;
// stringcache'd, pointer compare is safe.
else if (a->structure.members[i].identifier !=
b->structure.members[i].identifier)
return 0;
} // for
return 1;
case MOJOSHADER_AST_DATATYPE_ARRAY:
if (a->array.elements != b->array.elements)
return 0;
else if (!datatypes_match(a->array.base, b->array.base))
return 0;
return 1;
case MOJOSHADER_AST_DATATYPE_VECTOR:
if (a->vector.elements != b->vector.elements)
return 0;
else if (!datatypes_match(a->vector.base, b->vector.base))
return 0;
return 1;
case MOJOSHADER_AST_DATATYPE_MATRIX:
if (a->matrix.rows != b->matrix.rows)
return 0;
else if (a->matrix.columns != b->matrix.columns)
return 0;
else if (!datatypes_match(a->matrix.base, b->matrix.base))
return 0;
return 1;
case MOJOSHADER_AST_DATATYPE_BUFFER:
return datatypes_match(a->buffer.base, b->buffer.base);
case MOJOSHADER_AST_DATATYPE_FUNCTION:
if (a->function.num_params != b->function.num_params)
return 0;
else if (a->function.intrinsic != b->function.intrinsic)
return 0;
else if (!datatypes_match(a->function.retval, b->function.retval))
return 0;
for (i = 0; i < a->function.num_params; i++)
{
if (!datatypes_match(a->function.params[i], b->function.params[i]))
return 0;
} // for
return 1;
case MOJOSHADER_AST_DATATYPE_USER:
return 0; // pointers must match, this clearly didn't.
default:
assert(0 && "unexpected case");
return 0;
} // switch
return 0;
} // datatypes_match
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static void push_symbol(Context *ctx, SymbolMap *map, const char *sym,
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const MOJOSHADER_astDataType *dt, const int index,
const int check_dupes)
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{
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if (ctx->out_of_memory)
return;
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// Decide if this symbol is defined, and if it's in the current scope.
SymbolScope *item = NULL;
const void *value = NULL;
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if ((check_dupes) && (sym != NULL) && (hash_find(map->hash, sym, &value)))
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{
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// check the current scope for a dupe.
// !!! FIXME: note current scope's starting index, see if found
// !!! FIXME: item is < index (and thus, a previous scope).
item = map->scope;
while ((item) && (item->symbol))
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{
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if ( ((const void *) item) == value )
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{
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failf(ctx, "Symbol '%s' already defined", sym);
return;
} // if
item = item->next;
} // while
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} // if
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// Add the symbol to our map and scope stack.
item = (SymbolScope *) Malloc(ctx, sizeof (SymbolScope));
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if (item == NULL)
return;
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if (sym != NULL) // sym can be NULL if we're pushing a new scope.
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{
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if (hash_insert(map->hash, sym, item) == -1)
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{
Free(ctx, item);
return;
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} // if
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} // if
item->symbol = sym; // cached strings, don't copy.
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item->index = index;
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item->datatype = dt;
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item->referenced = 0;
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item->next = map->scope;
map->scope = item;
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} // push_symbol
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static void push_usertype(Context *ctx, const char *sym, const MOJOSHADER_astDataType *dt)
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{
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if (sym != NULL)
{
MOJOSHADER_astDataType *userdt;
userdt = (MOJOSHADER_astDataType *) Malloc(ctx, sizeof (*userdt));
if (userdt != NULL)
{
// !!! FIXME: this is hacky.
if (!buffer_append(ctx->garbage, &userdt, sizeof (userdt)))
{
Free(ctx, userdt);
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return;
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} // if
userdt->type = MOJOSHADER_AST_DATATYPE_USER;
userdt->user.details = dt;
userdt->user.name = sym;
dt = userdt;
} // if
} // if
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push_symbol(ctx, &ctx->usertypes, sym, dt, 0, 1);
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} // push_usertype
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static inline void push_variable(Context *ctx, const char *sym, const MOJOSHADER_astDataType *dt)
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{
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int idx = 0;
if (sym != NULL)
{
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// leave space for individual member indexes. The IR will need this.
int additional = 0;
if (dt->type == MOJOSHADER_AST_DATATYPE_STRUCT)
additional = dt->structure.member_count;
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if (ctx->is_func_scope)
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{
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idx = ++ctx->var_index; // these are positive.
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ctx->var_index += additional;
} // if
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else
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{
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idx = --ctx->global_var_index; // these are negative.
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ctx->global_var_index -= additional;
} // else
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} // if
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push_symbol(ctx, &ctx->variables, sym, dt, idx, 1);
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} // push_variable
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static int push_function(Context *ctx, const char *sym,
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const MOJOSHADER_astDataType *dt,
const int just_declare)
{
// we don't have any reason to support nested functions at the moment,
// so this would be a bug.
assert(!ctx->is_func_scope);
assert(dt->type == MOJOSHADER_AST_DATATYPE_FUNCTION);
// Functions are always global, so no need to search scopes.
// Functions overload, though, so we have to continue iterating to
// see if it matches anything.
const void *value = NULL;
void *iter = NULL;
while (hash_iter(ctx->variables.hash, sym, &value, &iter))
{
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// !!! FIXME: this breaks if you predeclare a function.
// !!! FIXME: (a declare AFTER defining works, though.)
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// there's already something called this.
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SymbolScope *item = (SymbolScope *) value;
if (datatypes_match(dt, item->datatype))
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{
if (!just_declare)
failf(ctx, "Function '%s' already defined.", sym);
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return item->index;
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} // if
} // while
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int idx = 0;
if ((sym != NULL) && (dt != NULL))
{
if (!dt->function.intrinsic)
idx = ++ctx->user_func_index; // these are positive.
else
idx = --ctx->intrinsic_func_index; // these are negative.
} // if
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// push_symbol() doesn't check dupes, because we just did.
push_symbol(ctx, &ctx->variables, sym, dt, idx, 0);
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return idx;
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} // push_function
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static inline void push_scope(Context *ctx)
{
push_usertype(ctx, NULL, NULL);
push_variable(ctx, NULL, NULL);
} // push_scope
static void pop_symbol(Context *ctx, SymbolMap *map)
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{
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SymbolScope *item = map->scope;
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if (!item)
return;
if (item->symbol)
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hash_remove(map->hash, item->symbol);
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map->scope = item->next;
Free(ctx, item);
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} // pop_symbol
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static void pop_symbol_scope(Context *ctx, SymbolMap *map)
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{
while ((map->scope) && (map->scope->symbol))
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pop_symbol(ctx, map);
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assert(map->scope != NULL);
assert(map->scope->symbol == NULL);
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pop_symbol(ctx, map);
} // pop_symbol_scope
static inline void pop_scope(Context *ctx)
{
pop_symbol_scope(ctx, &ctx->usertypes);
pop_symbol_scope(ctx, &ctx->variables);
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} // push_scope
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static const MOJOSHADER_astDataType *find_symbol(Context *ctx, SymbolMap *map, const char *sym, int *_index)
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{
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const void *_item = NULL;
hash_find(map->hash, sym, &_item);
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SymbolScope *item = (SymbolScope *) _item;
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if (item != NULL)
{
item->referenced++;
if (_index != NULL)
*_index = item->index;
} // if
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return item ? item->datatype : NULL;
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} // find_symbol
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static inline const MOJOSHADER_astDataType *find_usertype(Context *ctx, const char *sym)
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{
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return find_symbol(ctx, &ctx->usertypes, sym, NULL);
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} // find_usertype
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static inline const MOJOSHADER_astDataType *find_variable(Context *ctx, const char *sym, int *_index)
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{
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return find_symbol(ctx, &ctx->variables, sym, _index);
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} // find_variable
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static void destroy_symbolmap(Context *ctx, SymbolMap *map)
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{
while (map->scope)
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pop_symbol(ctx, map);
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hash_destroy(map->hash);
} // destroy_symbolmap
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static const MOJOSHADER_astDataType *new_datatype_vector(Context *ctx,
const MOJOSHADER_astDataType *dt,
const int columns)
{
MOJOSHADER_astDataType *retval;
retval = (MOJOSHADER_astDataType *) Malloc(ctx, sizeof (*retval));
if (retval == NULL)
return NULL;
// !!! FIXME: this is hacky.
// !!! FIXME: I'd like to cache these anyhow and reuse types.
if (!buffer_append(ctx->garbage, &retval, sizeof (retval)))
{
Free(ctx, retval);
return NULL;
} // if
if ((columns < 1) || (columns > 4))
fail(ctx, "Vector must have between 1 and 4 elements");
retval->type = MOJOSHADER_AST_DATATYPE_VECTOR;
retval->vector.base = dt;
retval->vector.elements = columns;
return retval;
} // new_datatype_vector
static const MOJOSHADER_astDataType *new_datatype_matrix(Context *ctx,
const MOJOSHADER_astDataType *dt,
const int rows, const int columns)
{
MOJOSHADER_astDataType *retval;
// !!! FIXME: allocate enough for a matrix, but we need to cleanup things that copy without checking for subsize.
retval = (MOJOSHADER_astDataType *) Malloc(ctx, sizeof (*retval));
if (retval == NULL)
return NULL;
// !!! FIXME: this is hacky.
// !!! FIXME: I'd like to cache these anyhow and reuse types.
if (!buffer_append(ctx->garbage, &retval, sizeof (retval)))
{
Free(ctx, retval);
return NULL;
} // if
if ((rows < 1) || (rows > 4))
fail(ctx, "Matrix must have between 1 and 4 rows");
if ((columns < 1) || (columns > 4))
fail(ctx, "Matrix must have between 1 and 4 columns");
retval->type = MOJOSHADER_AST_DATATYPE_MATRIX;
retval->matrix.base = dt;
retval->matrix.rows = rows;
retval->matrix.columns = columns;
return retval;
} // new_datatype_matrix
// !!! FIXME: move this to mojoshader_ast.c
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// !!! FIXME: new_* and delete_* should take an allocator, not a context.
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// These functions are mostly for construction and cleanup of nodes in the
// parse tree. Mostly this is simple allocation and initialization, so we
// can do as little in the lemon code as possible, and then sort it all out
// afterwards.
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#define NEW_AST_NODE(retval, cls, typ) \
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cls *retval = (cls *) Malloc(ctx, sizeof (cls)); \
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do { \
if (retval == NULL) { return NULL; } \
retval->ast.type = typ; \
retval->ast.filename = ctx->sourcefile; \
retval->ast.line = ctx->sourceline; \
} while (0)
#define DELETE_AST_NODE(cls) do { \
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if (!cls) return; \
} while (0)
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static void delete_compilation_unit(Context*, MOJOSHADER_astCompilationUnit*);
static void delete_statement(Context *ctx, MOJOSHADER_astStatement *stmt);
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static MOJOSHADER_astExpression *new_identifier_expr(Context *ctx,
const char *string)
{
NEW_AST_NODE(retval, MOJOSHADER_astExpressionIdentifier,
MOJOSHADER_AST_OP_IDENTIFIER);
620
retval->datatype = NULL;
621
retval->identifier = string; // cached; don't copy string.
622
retval->index = 0;
623
624
625
return (MOJOSHADER_astExpression *) retval;
} // new_identifier_expr
626
static MOJOSHADER_astExpression *new_callfunc_expr(Context *ctx,
627
const char *identifier,
628
MOJOSHADER_astArguments *args)
629
{
630
631
NEW_AST_NODE(retval, MOJOSHADER_astExpressionCallFunction,
MOJOSHADER_AST_OP_CALLFUNC);
632
MOJOSHADER_astExpression *expr = new_identifier_expr(ctx, identifier);
633
retval->datatype = NULL;
634
retval->identifier = (MOJOSHADER_astExpressionIdentifier *) expr;
635
retval->args = args;
636
return (MOJOSHADER_astExpression *) retval;
637
638
} // new_callfunc_expr
639
static MOJOSHADER_astExpression *new_constructor_expr(Context *ctx,
640
641
const MOJOSHADER_astDataType *dt,
MOJOSHADER_astArguments *args)
642
{
643
644
NEW_AST_NODE(retval, MOJOSHADER_astExpressionConstructor,
MOJOSHADER_AST_OP_CONSTRUCTOR);
645
retval->datatype = dt;
646
retval->args = args;
647
return (MOJOSHADER_astExpression *) retval;
648
649
} // new_constructor_expr
650
static MOJOSHADER_astExpression *new_cast_expr(Context *ctx,
651
const MOJOSHADER_astDataType *dt,
652
MOJOSHADER_astExpression *operand)
653
{
654
NEW_AST_NODE(retval, MOJOSHADER_astExpressionCast, MOJOSHADER_AST_OP_CAST);
655
retval->datatype = dt;
656
retval->operand = operand;
657
return (MOJOSHADER_astExpression *) retval;
658
659
} // new_cast_expr
660
661
662
static MOJOSHADER_astExpression *new_unary_expr(Context *ctx,
const MOJOSHADER_astNodeType op,
MOJOSHADER_astExpression *operand)
663
{
664
NEW_AST_NODE(retval, MOJOSHADER_astExpressionUnary, op);
665
assert(operator_is_unary(op));
666
retval->datatype = NULL;
667
retval->operand = operand;
668
return (MOJOSHADER_astExpression *) retval;
669
670
} // new_unary_expr
671
672
673
674
static MOJOSHADER_astExpression *new_binary_expr(Context *ctx,
const MOJOSHADER_astNodeType op,
MOJOSHADER_astExpression *left,
MOJOSHADER_astExpression *right)
675
{
676
NEW_AST_NODE(retval, MOJOSHADER_astExpressionBinary, op);
677
assert(operator_is_binary(op));
678
retval->datatype = NULL;
679
680
retval->left = left;
retval->right = right;
681
return (MOJOSHADER_astExpression *) retval;
682
683
} // new_binary_expr
684
685
686
687
688
static MOJOSHADER_astExpression *new_ternary_expr(Context *ctx,
const MOJOSHADER_astNodeType op,
MOJOSHADER_astExpression *left,
MOJOSHADER_astExpression *center,
MOJOSHADER_astExpression *right)
689
{
690
NEW_AST_NODE(retval, MOJOSHADER_astExpressionTernary, op);
691
assert(operator_is_ternary(op));
692
693
assert(op == MOJOSHADER_AST_OP_CONDITIONAL);
retval->datatype = &ctx->dt_bool;
694
695
696
retval->left = left;
retval->center = center;
retval->right = right;
697
return (MOJOSHADER_astExpression *) retval;
698
699
} // new_ternary_expr
700
701
702
static MOJOSHADER_astExpression *new_deref_struct_expr(Context *ctx,
MOJOSHADER_astExpression *identifier,
const char *member)
703
{
704
705
NEW_AST_NODE(retval, MOJOSHADER_astExpressionDerefStruct,
MOJOSHADER_AST_OP_DEREF_STRUCT);
706
retval->datatype = NULL;
707
708
retval->identifier = identifier;
retval->member = member; // cached; don't copy string.
709
retval->isswizzle = 0; // may change during semantic analysis.
710
retval->member_index = 0; // set during semantic analysis.
711
return (MOJOSHADER_astExpression *) retval;
712
713
} // new_deref_struct_expr
714
715
static MOJOSHADER_astExpression *new_literal_int_expr(Context *ctx,
const int value)
716
{
717
718
NEW_AST_NODE(retval, MOJOSHADER_astExpressionIntLiteral,
MOJOSHADER_AST_OP_INT_LITERAL);
719
retval->datatype = &ctx->dt_int;
720
retval->value = value;
721
return (MOJOSHADER_astExpression *) retval;
722
723
} // new_literal_int_expr
724
725
static MOJOSHADER_astExpression *new_literal_float_expr(Context *ctx,
const double dbl)
726
{
727
728
NEW_AST_NODE(retval, MOJOSHADER_astExpressionFloatLiteral,
MOJOSHADER_AST_OP_FLOAT_LITERAL);
729
retval->datatype = &ctx->dt_float;
730
retval->value = dbl;
731
return (MOJOSHADER_astExpression *) retval;
732
733
} // new_literal_float_expr
734
735
static MOJOSHADER_astExpression *new_literal_string_expr(Context *ctx,
const char *string)
736
{
737
738
NEW_AST_NODE(retval, MOJOSHADER_astExpressionStringLiteral,
MOJOSHADER_AST_OP_STRING_LITERAL);
739
retval->datatype = &ctx->dt_string;
740
retval->string = string; // cached; don't copy string.
741
return (MOJOSHADER_astExpression *) retval;
742
743
} // new_literal_string_expr
744
745
static MOJOSHADER_astExpression *new_literal_boolean_expr(Context *ctx,
const int value)
746
{
747
748
NEW_AST_NODE(retval, MOJOSHADER_astExpressionBooleanLiteral,
MOJOSHADER_AST_OP_BOOLEAN_LITERAL);
749
retval->datatype = &ctx->dt_bool;
750
retval->value = value;
751
return (MOJOSHADER_astExpression *) retval;
752
} // new_literal_boolean_expr
753
754
static void delete_arguments(Context *ctx, MOJOSHADER_astArguments *args);
755
756
static void delete_expr(Context *ctx, MOJOSHADER_astExpression *_expr)
757
{
758
759
MOJOSHADER_astNode *expr = (MOJOSHADER_astNode *) _expr;
760
DELETE_AST_NODE(expr);
761
762
763
764
765
766
767
768
769
770
771
772
773
if (expr->ast.type == MOJOSHADER_AST_OP_CAST)
delete_expr(ctx, expr->cast.operand);
else if (expr->ast.type == MOJOSHADER_AST_OP_CONSTRUCTOR)
delete_arguments(ctx, expr->constructor.args);
else if (expr->ast.type == MOJOSHADER_AST_OP_DEREF_STRUCT)
delete_expr(ctx, expr->derefstruct.identifier);
else if (operator_is_unary(expr->ast.type))
delete_expr(ctx, expr->unary.operand);
774
else if (operator_is_binary(expr->ast.type))
775
{
776
777
delete_expr(ctx, expr->binary.left);
delete_expr(ctx, expr->binary.right);
778
} // else if
779
780
else if (operator_is_ternary(expr->ast.type))
781
{
782
783
784
delete_expr(ctx, expr->ternary.left);
delete_expr(ctx, expr->ternary.center);
delete_expr(ctx, expr->ternary.right);
785
} // else if
786
787
else if (expr->ast.type == MOJOSHADER_AST_OP_CALLFUNC)
788
{
789
delete_expr(ctx, (MOJOSHADER_astExpression*)expr->callfunc.identifier);
790
delete_arguments(ctx, expr->callfunc.args);
791
} // else if
792
793
794
// rest of operators don't have extra data to free.
795
796
797
Free(ctx, expr);
} // delete_expr
798
799
static MOJOSHADER_astArguments *new_argument(Context *ctx,
MOJOSHADER_astExpression *arg)
800
{
801
802
NEW_AST_NODE(retval, MOJOSHADER_astArguments, MOJOSHADER_AST_ARGUMENTS);
retval->argument = arg;
803
804
805
806
retval->next = NULL;
return retval;
} // new_argument
807
static void delete_arguments(Context *ctx, MOJOSHADER_astArguments *args)
808
809
810
811
812
813
814
{
DELETE_AST_NODE(args);
delete_arguments(ctx, args->next);
delete_expr(ctx, args->argument);
Free(ctx, args);
} // delete_arguments
815
816
static MOJOSHADER_astFunctionParameters *new_function_param(Context *ctx,
const MOJOSHADER_astInputModifier inputmod,
817
818
const MOJOSHADER_astDataType *dt,
const char *identifier, const char *semantic,
819
820
const MOJOSHADER_astInterpolationModifier interpmod,
MOJOSHADER_astExpression *initializer)
821
{
822
823
NEW_AST_NODE(retval, MOJOSHADER_astFunctionParameters,
MOJOSHADER_AST_FUNCTION_PARAMS);
824
retval->datatype = dt;
825
826
827
828
829
830
831
retval->input_modifier = inputmod;
retval->identifier = identifier;
retval->semantic = semantic;
retval->interpolation_modifier = interpmod;
retval->initializer = initializer;
retval->next = NULL;
return retval;
832
} // new_function_param
833
834
835
static void delete_function_params(Context *ctx,
MOJOSHADER_astFunctionParameters *params)
836
{
837
838
839
840
841
DELETE_AST_NODE(params);
delete_function_params(ctx, params->next);
delete_expr(ctx, params->initializer);
Free(ctx, params);
} // delete_function_params
842
843
static MOJOSHADER_astFunctionSignature *new_function_signature(Context *ctx,
844
const MOJOSHADER_astDataType *dt,
845
846
const char *identifier,
MOJOSHADER_astFunctionParameters *params)
847
{
848
849
NEW_AST_NODE(retval, MOJOSHADER_astFunctionSignature,
MOJOSHADER_AST_FUNCTION_SIGNATURE);
850
retval->datatype = dt;
851
retval->identifier = identifier;
852
retval->params = params;
853
retval->storage_class = MOJOSHADER_AST_FNSTORECLS_NONE;
854
855
856
857
retval->semantic = NULL;
return retval;
} // new_function_signature
858
859
static void delete_function_signature(Context *ctx,
MOJOSHADER_astFunctionSignature *sig)
860
861
{
DELETE_AST_NODE(sig);
862
delete_function_params(ctx, sig->params);
863
864
865
Free(ctx, sig);
} // delete_function_signature
866
867
868
static MOJOSHADER_astCompilationUnit *new_function(Context *ctx,
MOJOSHADER_astFunctionSignature *declaration,
MOJOSHADER_astStatement *definition)
869
{
870
871
NEW_AST_NODE(retval, MOJOSHADER_astCompilationUnitFunction,
MOJOSHADER_AST_COMPUNIT_FUNCTION);
872
873
874
retval->next = NULL;
retval->declaration = declaration;
retval->definition = definition;
875
retval->index = 0;
876
return (MOJOSHADER_astCompilationUnit *) retval;
877
878
} // new_function
879
880
static void delete_function(Context *ctx,
MOJOSHADER_astCompilationUnitFunction *unitfn)
881
882
883
884
885
886
887
888
{
DELETE_AST_NODE(unitfn);
delete_compilation_unit(ctx, unitfn->next);
delete_function_signature(ctx, unitfn->declaration);
delete_statement(ctx, unitfn->definition);
Free(ctx, unitfn);
} // delete_function
889
890
891
static MOJOSHADER_astScalarOrArray *new_scalar_or_array(Context *ctx,
const char *ident, const int isvec,
MOJOSHADER_astExpression *dim)
892
{
893
894
NEW_AST_NODE(retval, MOJOSHADER_astScalarOrArray,
MOJOSHADER_AST_SCALAR_OR_ARRAY);
895
896
897
898
899
900
retval->identifier = ident;
retval->isarray = isvec;
retval->dimension = dim;
return retval;
} // new_scalar_or_array
901
static void delete_scalar_or_array(Context *ctx,MOJOSHADER_astScalarOrArray *s)
902
{
903
904
905
DELETE_AST_NODE(s);
delete_expr(ctx, s->dimension);
Free(ctx, s);
906
907
} // delete_scalar_or_array
908
static MOJOSHADER_astTypedef *new_typedef(Context *ctx, const int isconst,
909
const MOJOSHADER_astDataType *dt,
910
MOJOSHADER_astScalarOrArray *soa)
911
{
912
// we correct this datatype to the final version during semantic analysis.
913
NEW_AST_NODE(retval, MOJOSHADER_astTypedef, MOJOSHADER_AST_TYPEDEF);
914
retval->datatype = dt;
915
916
917
918
919
retval->isconst = isconst;
retval->details = soa;
return retval;
} // new_typedef
920
static void delete_typedef(Context *ctx, MOJOSHADER_astTypedef *td)
921
922
923
924
925
926
{
DELETE_AST_NODE(td);
delete_scalar_or_array(ctx, td->details);
Free(ctx, td);
} // delete_typedef
927
928
static MOJOSHADER_astPackOffset *new_pack_offset(Context *ctx,
const char *a, const char *b)
929
{
930
NEW_AST_NODE(retval, MOJOSHADER_astPackOffset, MOJOSHADER_AST_PACK_OFFSET);
931
932
933
934
935
retval->ident1 = a;
retval->ident2 = b;
return retval;
} // new_pack_offset
936
static void delete_pack_offset(Context *ctx, MOJOSHADER_astPackOffset *o)
937
938
939
940
941
{
DELETE_AST_NODE(o);
Free(ctx, o);
} // delete_pack_offset
942
943
static MOJOSHADER_astVariableLowLevel *new_variable_lowlevel(Context *ctx,
MOJOSHADER_astPackOffset *po,
944
945
const char *reg)
{
946
947
NEW_AST_NODE(retval, MOJOSHADER_astVariableLowLevel,
MOJOSHADER_AST_VARIABLE_LOWLEVEL);
948
949
950
951
952
retval->packoffset = po;
retval->register_name = reg;
return retval;
} // new_variable_lowlevel
953
954
static void delete_variable_lowlevel(Context *ctx,
MOJOSHADER_astVariableLowLevel *vll)
955
956
957
958
959
960
{
DELETE_AST_NODE(vll);
delete_pack_offset(ctx, vll->packoffset);
Free(ctx, vll);
} // delete_variable_lowlevel
961
static MOJOSHADER_astAnnotations *new_annotation(Context *ctx,
962
const MOJOSHADER_astDataType *dt,
963
MOJOSHADER_astExpression *initializer)
964
{
965
NEW_AST_NODE(retval, MOJOSHADER_astAnnotations, MOJOSHADER_AST_ANNOTATION);
966
retval->datatype = dt;
967
968
969
970
971
retval->initializer = initializer;
retval->next = NULL;
return retval;
} // new_annotation
972
static void delete_annotation(Context *ctx, MOJOSHADER_astAnnotations *annos)
973
{
974
975
976
977
DELETE_AST_NODE(annos);
delete_annotation(ctx, annos->next);
delete_expr(ctx, annos->initializer);
Free(ctx, annos);
978
979
} // delete_annotation
980
981
982
983
984
985
static MOJOSHADER_astVariableDeclaration *new_variable_declaration(
Context *ctx, MOJOSHADER_astScalarOrArray *soa,
const char *semantic,
MOJOSHADER_astAnnotations *annotations,
MOJOSHADER_astExpression *init,
MOJOSHADER_astVariableLowLevel *vll)
986
{
987
988
NEW_AST_NODE(retval, MOJOSHADER_astVariableDeclaration,
MOJOSHADER_AST_VARIABLE_DECLARATION);
989
retval->datatype = NULL;
990
991
992
993
994
995
996
997
998
999
1000
retval->attributes = 0;
retval->anonymous_datatype = NULL;
retval->details = soa;
retval->semantic = semantic;
retval->annotations = annotations;
retval->initializer = init;
retval->lowlevel = vll;
retval->next = NULL;
return retval;
} // new_variable_declaration