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-rw-r--r--mesalib/src/glsl/glcpp/glcpp-parse.y3812
1 files changed, 1906 insertions, 1906 deletions
diff --git a/mesalib/src/glsl/glcpp/glcpp-parse.y b/mesalib/src/glsl/glcpp/glcpp-parse.y
index bfbabb320..940830416 100644
--- a/mesalib/src/glsl/glcpp/glcpp-parse.y
+++ b/mesalib/src/glsl/glcpp/glcpp-parse.y
@@ -1,1906 +1,1906 @@
-%{
-/*
- * Copyright © 2010 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-#include <inttypes.h>
-
-#include "glcpp.h"
-#include "main/core.h" /* for struct gl_extensions */
-#include "main/mtypes.h" /* for gl_api enum */
-
-static void
-yyerror (YYLTYPE *locp, glcpp_parser_t *parser, const char *error);
-
-static void
-_define_object_macro (glcpp_parser_t *parser,
- YYLTYPE *loc,
- const char *macro,
- token_list_t *replacements);
-
-static void
-_define_function_macro (glcpp_parser_t *parser,
- YYLTYPE *loc,
- const char *macro,
- string_list_t *parameters,
- token_list_t *replacements);
-
-static string_list_t *
-_string_list_create (void *ctx);
-
-static void
-_string_list_append_item (string_list_t *list, const char *str);
-
-static int
-_string_list_contains (string_list_t *list, const char *member, int *index);
-
-static int
-_string_list_length (string_list_t *list);
-
-static int
-_string_list_equal (string_list_t *a, string_list_t *b);
-
-static argument_list_t *
-_argument_list_create (void *ctx);
-
-static void
-_argument_list_append (argument_list_t *list, token_list_t *argument);
-
-static int
-_argument_list_length (argument_list_t *list);
-
-static token_list_t *
-_argument_list_member_at (argument_list_t *list, int index);
-
-/* Note: This function ralloc_steal()s the str pointer. */
-static token_t *
-_token_create_str (void *ctx, int type, char *str);
-
-static token_t *
-_token_create_ival (void *ctx, int type, int ival);
-
-static token_list_t *
-_token_list_create (void *ctx);
-
-/* Note: This function calls ralloc_steal on token. */
-static void
-_token_list_append (token_list_t *list, token_t *token);
-
-static void
-_token_list_append_list (token_list_t *list, token_list_t *tail);
-
-static int
-_token_list_equal_ignoring_space (token_list_t *a, token_list_t *b);
-
-static void
-_parser_active_list_push (glcpp_parser_t *parser,
- const char *identifier,
- token_node_t *marker);
-
-static void
-_parser_active_list_pop (glcpp_parser_t *parser);
-
-static int
-_parser_active_list_contains (glcpp_parser_t *parser, const char *identifier);
-
-static void
-_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list);
-
-static void
-_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
- token_list_t *list);
-
-static void
-_glcpp_parser_print_expanded_token_list (glcpp_parser_t *parser,
- token_list_t *list);
-
-static void
-_glcpp_parser_skip_stack_push_if (glcpp_parser_t *parser, YYLTYPE *loc,
- int condition);
-
-static void
-_glcpp_parser_skip_stack_change_if (glcpp_parser_t *parser, YYLTYPE *loc,
- const char *type, int condition);
-
-static void
-_glcpp_parser_skip_stack_pop (glcpp_parser_t *parser, YYLTYPE *loc);
-
-#define yylex glcpp_parser_lex
-
-static int
-glcpp_parser_lex (YYSTYPE *yylval, YYLTYPE *yylloc, glcpp_parser_t *parser);
-
-static void
-glcpp_parser_lex_from (glcpp_parser_t *parser, token_list_t *list);
-
-static void
-add_builtin_define(glcpp_parser_t *parser, const char *name, int value);
-
-%}
-
-%pure-parser
-%error-verbose
-
-%locations
-%initial-action {
- @$.first_line = 1;
- @$.first_column = 1;
- @$.last_line = 1;
- @$.last_column = 1;
- @$.source = 0;
-}
-
-%parse-param {glcpp_parser_t *parser}
-%lex-param {glcpp_parser_t *parser}
-
-%expect 0
-%token COMMA_FINAL DEFINED ELIF_EXPANDED HASH HASH_DEFINE_FUNC HASH_DEFINE_OBJ HASH_ELIF HASH_ELSE HASH_ENDIF HASH_IF HASH_IFDEF HASH_IFNDEF HASH_UNDEF HASH_VERSION IDENTIFIER IF_EXPANDED INTEGER INTEGER_STRING NEWLINE OTHER PLACEHOLDER SPACE
-%token PASTE
-%type <ival> expression INTEGER operator SPACE integer_constant
-%type <str> IDENTIFIER INTEGER_STRING OTHER
-%type <string_list> identifier_list
-%type <token> preprocessing_token conditional_token
-%type <token_list> pp_tokens replacement_list text_line conditional_tokens
-%left OR
-%left AND
-%left '|'
-%left '^'
-%left '&'
-%left EQUAL NOT_EQUAL
-%left '<' '>' LESS_OR_EQUAL GREATER_OR_EQUAL
-%left LEFT_SHIFT RIGHT_SHIFT
-%left '+' '-'
-%left '*' '/' '%'
-%right UNARY
-
-%%
-
-input:
- /* empty */
-| input line
-;
-
-line:
- control_line {
- ralloc_strcat (&parser->output, "\n");
- }
-| text_line {
- _glcpp_parser_print_expanded_token_list (parser, $1);
- ralloc_strcat (&parser->output, "\n");
- ralloc_free ($1);
- }
-| expanded_line
-| HASH non_directive
-;
-
-expanded_line:
- IF_EXPANDED expression NEWLINE {
- _glcpp_parser_skip_stack_push_if (parser, & @1, $2);
- }
-| ELIF_EXPANDED expression NEWLINE {
- _glcpp_parser_skip_stack_change_if (parser, & @1, "elif", $2);
- }
-;
-
-control_line:
- HASH_DEFINE_OBJ IDENTIFIER replacement_list NEWLINE {
- _define_object_macro (parser, & @2, $2, $3);
- }
-| HASH_DEFINE_FUNC IDENTIFIER '(' ')' replacement_list NEWLINE {
- _define_function_macro (parser, & @2, $2, NULL, $5);
- }
-| HASH_DEFINE_FUNC IDENTIFIER '(' identifier_list ')' replacement_list NEWLINE {
- _define_function_macro (parser, & @2, $2, $4, $6);
- }
-| HASH_UNDEF IDENTIFIER NEWLINE {
- macro_t *macro = hash_table_find (parser->defines, $2);
- if (macro) {
- hash_table_remove (parser->defines, $2);
- ralloc_free (macro);
- }
- ralloc_free ($2);
- }
-| HASH_IF conditional_tokens NEWLINE {
- /* Be careful to only evaluate the 'if' expression if
- * we are not skipping. When we are skipping, we
- * simply push a new 0-valued 'if' onto the skip
- * stack.
- *
- * This avoids generating diagnostics for invalid
- * expressions that are being skipped. */
- if (parser->skip_stack == NULL ||
- parser->skip_stack->type == SKIP_NO_SKIP)
- {
- _glcpp_parser_expand_if (parser, IF_EXPANDED, $2);
- }
- else
- {
- _glcpp_parser_skip_stack_push_if (parser, & @1, 0);
- parser->skip_stack->type = SKIP_TO_ENDIF;
- }
- }
-| HASH_IF NEWLINE {
- /* #if without an expression is only an error if we
- * are not skipping */
- if (parser->skip_stack == NULL ||
- parser->skip_stack->type == SKIP_NO_SKIP)
- {
- glcpp_error(& @1, parser, "#if with no expression");
- }
- _glcpp_parser_skip_stack_push_if (parser, & @1, 0);
- }
-| HASH_IFDEF IDENTIFIER junk NEWLINE {
- macro_t *macro = hash_table_find (parser->defines, $2);
- ralloc_free ($2);
- _glcpp_parser_skip_stack_push_if (parser, & @1, macro != NULL);
- }
-| HASH_IFNDEF IDENTIFIER junk NEWLINE {
- macro_t *macro = hash_table_find (parser->defines, $2);
- ralloc_free ($2);
- _glcpp_parser_skip_stack_push_if (parser, & @1, macro == NULL);
- }
-| HASH_ELIF conditional_tokens NEWLINE {
- /* Be careful to only evaluate the 'elif' expression
- * if we are not skipping. When we are skipping, we
- * simply change to a 0-valued 'elif' on the skip
- * stack.
- *
- * This avoids generating diagnostics for invalid
- * expressions that are being skipped. */
- if (parser->skip_stack &&
- parser->skip_stack->type == SKIP_TO_ELSE)
- {
- _glcpp_parser_expand_if (parser, ELIF_EXPANDED, $2);
- }
- else
- {
- _glcpp_parser_skip_stack_change_if (parser, & @1,
- "elif", 0);
- }
- }
-| HASH_ELIF NEWLINE {
- /* #elif without an expression is an error unless we
- * are skipping. */
- if (parser->skip_stack &&
- parser->skip_stack->type == SKIP_TO_ELSE)
- {
- glcpp_error(& @1, parser, "#elif with no expression");
- }
- else
- {
- _glcpp_parser_skip_stack_change_if (parser, & @1,
- "elif", 0);
- glcpp_warning(& @1, parser, "ignoring illegal #elif without expression");
- }
- }
-| HASH_ELSE NEWLINE {
- _glcpp_parser_skip_stack_change_if (parser, & @1, "else", 1);
- }
-| HASH_ENDIF NEWLINE {
- _glcpp_parser_skip_stack_pop (parser, & @1);
- }
-| HASH_VERSION integer_constant NEWLINE {
- macro_t *macro = hash_table_find (parser->defines, "__VERSION__");
- if (macro) {
- hash_table_remove (parser->defines, "__VERSION__");
- ralloc_free (macro);
- }
- add_builtin_define (parser, "__VERSION__", $2);
-
- if ($2 == 100)
- add_builtin_define (parser, "GL_ES", 1);
-
- /* Currently, all ES2 implementations support highp in the
- * fragment shader, so we always define this macro in ES2.
- * If we ever get a driver that doesn't support highp, we'll
- * need to add a flag to the gl_context and check that here.
- */
- if ($2 >= 130 || $2 == 100)
- add_builtin_define (parser, "GL_FRAGMENT_PRECISION_HIGH", 1);
-
- ralloc_asprintf_append (&parser->output, "#version %" PRIiMAX, $2);
- }
-| HASH NEWLINE
-;
-
-integer_constant:
- INTEGER_STRING {
- if (strlen ($1) >= 3 && strncmp ($1, "0x", 2) == 0) {
- $$ = strtoll ($1 + 2, NULL, 16);
- } else if ($1[0] == '0') {
- $$ = strtoll ($1, NULL, 8);
- } else {
- $$ = strtoll ($1, NULL, 10);
- }
- }
-| INTEGER {
- $$ = $1;
- }
-
-expression:
- integer_constant
-| expression OR expression {
- $$ = $1 || $3;
- }
-| expression AND expression {
- $$ = $1 && $3;
- }
-| expression '|' expression {
- $$ = $1 | $3;
- }
-| expression '^' expression {
- $$ = $1 ^ $3;
- }
-| expression '&' expression {
- $$ = $1 & $3;
- }
-| expression NOT_EQUAL expression {
- $$ = $1 != $3;
- }
-| expression EQUAL expression {
- $$ = $1 == $3;
- }
-| expression GREATER_OR_EQUAL expression {
- $$ = $1 >= $3;
- }
-| expression LESS_OR_EQUAL expression {
- $$ = $1 <= $3;
- }
-| expression '>' expression {
- $$ = $1 > $3;
- }
-| expression '<' expression {
- $$ = $1 < $3;
- }
-| expression RIGHT_SHIFT expression {
- $$ = $1 >> $3;
- }
-| expression LEFT_SHIFT expression {
- $$ = $1 << $3;
- }
-| expression '-' expression {
- $$ = $1 - $3;
- }
-| expression '+' expression {
- $$ = $1 + $3;
- }
-| expression '%' expression {
- if ($3 == 0) {
- yyerror (& @1, parser,
- "zero modulus in preprocessor directive");
- } else {
- $$ = $1 % $3;
- }
- }
-| expression '/' expression {
- if ($3 == 0) {
- yyerror (& @1, parser,
- "division by 0 in preprocessor directive");
- } else {
- $$ = $1 / $3;
- }
- }
-| expression '*' expression {
- $$ = $1 * $3;
- }
-| '!' expression %prec UNARY {
- $$ = ! $2;
- }
-| '~' expression %prec UNARY {
- $$ = ~ $2;
- }
-| '-' expression %prec UNARY {
- $$ = - $2;
- }
-| '+' expression %prec UNARY {
- $$ = + $2;
- }
-| '(' expression ')' {
- $$ = $2;
- }
-;
-
-identifier_list:
- IDENTIFIER {
- $$ = _string_list_create (parser);
- _string_list_append_item ($$, $1);
- ralloc_steal ($$, $1);
- }
-| identifier_list ',' IDENTIFIER {
- $$ = $1;
- _string_list_append_item ($$, $3);
- ralloc_steal ($$, $3);
- }
-;
-
-text_line:
- NEWLINE { $$ = NULL; }
-| pp_tokens NEWLINE
-;
-
-non_directive:
- pp_tokens NEWLINE {
- yyerror (& @1, parser, "Invalid tokens after #");
- }
-;
-
-replacement_list:
- /* empty */ { $$ = NULL; }
-| pp_tokens
-;
-
-junk:
- /* empty */
-| pp_tokens {
- glcpp_warning(&@1, parser, "extra tokens at end of directive");
- }
-;
-
-conditional_token:
- /* Handle "defined" operator */
- DEFINED IDENTIFIER {
- int v = hash_table_find (parser->defines, $2) ? 1 : 0;
- $$ = _token_create_ival (parser, INTEGER, v);
- }
-| DEFINED '(' IDENTIFIER ')' {
- int v = hash_table_find (parser->defines, $3) ? 1 : 0;
- $$ = _token_create_ival (parser, INTEGER, v);
- }
-| preprocessing_token
-;
-
-conditional_tokens:
- /* Exactly the same as pp_tokens, but using conditional_token */
- conditional_token {
- $$ = _token_list_create (parser);
- _token_list_append ($$, $1);
- }
-| conditional_tokens conditional_token {
- $$ = $1;
- _token_list_append ($$, $2);
- }
-;
-
-pp_tokens:
- preprocessing_token {
- parser->space_tokens = 1;
- $$ = _token_list_create (parser);
- _token_list_append ($$, $1);
- }
-| pp_tokens preprocessing_token {
- $$ = $1;
- _token_list_append ($$, $2);
- }
-;
-
-preprocessing_token:
- IDENTIFIER {
- $$ = _token_create_str (parser, IDENTIFIER, $1);
- $$->location = yylloc;
- }
-| INTEGER_STRING {
- $$ = _token_create_str (parser, INTEGER_STRING, $1);
- $$->location = yylloc;
- }
-| operator {
- $$ = _token_create_ival (parser, $1, $1);
- $$->location = yylloc;
- }
-| OTHER {
- $$ = _token_create_str (parser, OTHER, $1);
- $$->location = yylloc;
- }
-| SPACE {
- $$ = _token_create_ival (parser, SPACE, SPACE);
- $$->location = yylloc;
- }
-;
-
-operator:
- '[' { $$ = '['; }
-| ']' { $$ = ']'; }
-| '(' { $$ = '('; }
-| ')' { $$ = ')'; }
-| '{' { $$ = '{'; }
-| '}' { $$ = '}'; }
-| '.' { $$ = '.'; }
-| '&' { $$ = '&'; }
-| '*' { $$ = '*'; }
-| '+' { $$ = '+'; }
-| '-' { $$ = '-'; }
-| '~' { $$ = '~'; }
-| '!' { $$ = '!'; }
-| '/' { $$ = '/'; }
-| '%' { $$ = '%'; }
-| LEFT_SHIFT { $$ = LEFT_SHIFT; }
-| RIGHT_SHIFT { $$ = RIGHT_SHIFT; }
-| '<' { $$ = '<'; }
-| '>' { $$ = '>'; }
-| LESS_OR_EQUAL { $$ = LESS_OR_EQUAL; }
-| GREATER_OR_EQUAL { $$ = GREATER_OR_EQUAL; }
-| EQUAL { $$ = EQUAL; }
-| NOT_EQUAL { $$ = NOT_EQUAL; }
-| '^' { $$ = '^'; }
-| '|' { $$ = '|'; }
-| AND { $$ = AND; }
-| OR { $$ = OR; }
-| ';' { $$ = ';'; }
-| ',' { $$ = ','; }
-| '=' { $$ = '='; }
-| PASTE { $$ = PASTE; }
-;
-
-%%
-
-string_list_t *
-_string_list_create (void *ctx)
-{
- string_list_t *list;
-
- list = ralloc (ctx, string_list_t);
- list->head = NULL;
- list->tail = NULL;
-
- return list;
-}
-
-void
-_string_list_append_item (string_list_t *list, const char *str)
-{
- string_node_t *node;
-
- node = ralloc (list, string_node_t);
- node->str = ralloc_strdup (node, str);
-
- node->next = NULL;
-
- if (list->head == NULL) {
- list->head = node;
- } else {
- list->tail->next = node;
- }
-
- list->tail = node;
-}
-
-int
-_string_list_contains (string_list_t *list, const char *member, int *index)
-{
- string_node_t *node;
- int i;
-
- if (list == NULL)
- return 0;
-
- for (i = 0, node = list->head; node; i++, node = node->next) {
- if (strcmp (node->str, member) == 0) {
- if (index)
- *index = i;
- return 1;
- }
- }
-
- return 0;
-}
-
-int
-_string_list_length (string_list_t *list)
-{
- int length = 0;
- string_node_t *node;
-
- if (list == NULL)
- return 0;
-
- for (node = list->head; node; node = node->next)
- length++;
-
- return length;
-}
-
-int
-_string_list_equal (string_list_t *a, string_list_t *b)
-{
- string_node_t *node_a, *node_b;
-
- if (a == NULL && b == NULL)
- return 1;
-
- if (a == NULL || b == NULL)
- return 0;
-
- for (node_a = a->head, node_b = b->head;
- node_a && node_b;
- node_a = node_a->next, node_b = node_b->next)
- {
- if (strcmp (node_a->str, node_b->str))
- return 0;
- }
-
- /* Catch the case of lists being different lengths, (which
- * would cause the loop above to terminate after the shorter
- * list). */
- return node_a == node_b;
-}
-
-argument_list_t *
-_argument_list_create (void *ctx)
-{
- argument_list_t *list;
-
- list = ralloc (ctx, argument_list_t);
- list->head = NULL;
- list->tail = NULL;
-
- return list;
-}
-
-void
-_argument_list_append (argument_list_t *list, token_list_t *argument)
-{
- argument_node_t *node;
-
- node = ralloc (list, argument_node_t);
- node->argument = argument;
-
- node->next = NULL;
-
- if (list->head == NULL) {
- list->head = node;
- } else {
- list->tail->next = node;
- }
-
- list->tail = node;
-}
-
-int
-_argument_list_length (argument_list_t *list)
-{
- int length = 0;
- argument_node_t *node;
-
- if (list == NULL)
- return 0;
-
- for (node = list->head; node; node = node->next)
- length++;
-
- return length;
-}
-
-token_list_t *
-_argument_list_member_at (argument_list_t *list, int index)
-{
- argument_node_t *node;
- int i;
-
- if (list == NULL)
- return NULL;
-
- node = list->head;
- for (i = 0; i < index; i++) {
- node = node->next;
- if (node == NULL)
- break;
- }
-
- if (node)
- return node->argument;
-
- return NULL;
-}
-
-/* Note: This function ralloc_steal()s the str pointer. */
-token_t *
-_token_create_str (void *ctx, int type, char *str)
-{
- token_t *token;
-
- token = ralloc (ctx, token_t);
- token->type = type;
- token->value.str = str;
-
- ralloc_steal (token, str);
-
- return token;
-}
-
-token_t *
-_token_create_ival (void *ctx, int type, int ival)
-{
- token_t *token;
-
- token = ralloc (ctx, token_t);
- token->type = type;
- token->value.ival = ival;
-
- return token;
-}
-
-token_list_t *
-_token_list_create (void *ctx)
-{
- token_list_t *list;
-
- list = ralloc (ctx, token_list_t);
- list->head = NULL;
- list->tail = NULL;
- list->non_space_tail = NULL;
-
- return list;
-}
-
-void
-_token_list_append (token_list_t *list, token_t *token)
-{
- token_node_t *node;
-
- node = ralloc (list, token_node_t);
- node->token = token;
- node->next = NULL;
-
- ralloc_steal (list, token);
-
- if (list->head == NULL) {
- list->head = node;
- } else {
- list->tail->next = node;
- }
-
- list->tail = node;
- if (token->type != SPACE)
- list->non_space_tail = node;
-}
-
-void
-_token_list_append_list (token_list_t *list, token_list_t *tail)
-{
- if (tail == NULL || tail->head == NULL)
- return;
-
- if (list->head == NULL) {
- list->head = tail->head;
- } else {
- list->tail->next = tail->head;
- }
-
- list->tail = tail->tail;
- list->non_space_tail = tail->non_space_tail;
-}
-
-static token_list_t *
-_token_list_copy (void *ctx, token_list_t *other)
-{
- token_list_t *copy;
- token_node_t *node;
-
- if (other == NULL)
- return NULL;
-
- copy = _token_list_create (ctx);
- for (node = other->head; node; node = node->next) {
- token_t *new_token = ralloc (copy, token_t);
- *new_token = *node->token;
- _token_list_append (copy, new_token);
- }
-
- return copy;
-}
-
-static void
-_token_list_trim_trailing_space (token_list_t *list)
-{
- token_node_t *tail, *next;
-
- if (list->non_space_tail) {
- tail = list->non_space_tail->next;
- list->non_space_tail->next = NULL;
- list->tail = list->non_space_tail;
-
- while (tail) {
- next = tail->next;
- ralloc_free (tail);
- tail = next;
- }
- }
-}
-
-static int
-_token_list_is_empty_ignoring_space (token_list_t *l)
-{
- token_node_t *n;
-
- if (l == NULL)
- return 1;
-
- n = l->head;
- while (n != NULL && n->token->type == SPACE)
- n = n->next;
-
- return n == NULL;
-}
-
-int
-_token_list_equal_ignoring_space (token_list_t *a, token_list_t *b)
-{
- token_node_t *node_a, *node_b;
-
- if (a == NULL || b == NULL) {
- int a_empty = _token_list_is_empty_ignoring_space(a);
- int b_empty = _token_list_is_empty_ignoring_space(b);
- return a_empty == b_empty;
- }
-
- node_a = a->head;
- node_b = b->head;
-
- while (1)
- {
- if (node_a == NULL && node_b == NULL)
- break;
-
- if (node_a == NULL || node_b == NULL)
- return 0;
-
- if (node_a->token->type == SPACE) {
- node_a = node_a->next;
- continue;
- }
-
- if (node_b->token->type == SPACE) {
- node_b = node_b->next;
- continue;
- }
-
- if (node_a->token->type != node_b->token->type)
- return 0;
-
- switch (node_a->token->type) {
- case INTEGER:
- if (node_a->token->value.ival !=
- node_b->token->value.ival)
- {
- return 0;
- }
- break;
- case IDENTIFIER:
- case INTEGER_STRING:
- case OTHER:
- if (strcmp (node_a->token->value.str,
- node_b->token->value.str))
- {
- return 0;
- }
- break;
- }
-
- node_a = node_a->next;
- node_b = node_b->next;
- }
-
- return 1;
-}
-
-static void
-_token_print (char **out, token_t *token)
-{
- if (token->type < 256) {
- ralloc_asprintf_append (out, "%c", token->type);
- return;
- }
-
- switch (token->type) {
- case INTEGER:
- ralloc_asprintf_append (out, "%" PRIiMAX, token->value.ival);
- break;
- case IDENTIFIER:
- case INTEGER_STRING:
- case OTHER:
- ralloc_strcat (out, token->value.str);
- break;
- case SPACE:
- ralloc_strcat (out, " ");
- break;
- case LEFT_SHIFT:
- ralloc_strcat (out, "<<");
- break;
- case RIGHT_SHIFT:
- ralloc_strcat (out, ">>");
- break;
- case LESS_OR_EQUAL:
- ralloc_strcat (out, "<=");
- break;
- case GREATER_OR_EQUAL:
- ralloc_strcat (out, ">=");
- break;
- case EQUAL:
- ralloc_strcat (out, "==");
- break;
- case NOT_EQUAL:
- ralloc_strcat (out, "!=");
- break;
- case AND:
- ralloc_strcat (out, "&&");
- break;
- case OR:
- ralloc_strcat (out, "||");
- break;
- case PASTE:
- ralloc_strcat (out, "##");
- break;
- case COMMA_FINAL:
- ralloc_strcat (out, ",");
- break;
- case PLACEHOLDER:
- /* Nothing to print. */
- break;
- default:
- assert(!"Error: Don't know how to print token.");
- break;
- }
-}
-
-/* Return a new token (ralloc()ed off of 'token') formed by pasting
- * 'token' and 'other'. Note that this function may return 'token' or
- * 'other' directly rather than allocating anything new.
- *
- * Caution: Only very cursory error-checking is performed to see if
- * the final result is a valid single token. */
-static token_t *
-_token_paste (glcpp_parser_t *parser, token_t *token, token_t *other)
-{
- token_t *combined = NULL;
-
- /* Pasting a placeholder onto anything makes no change. */
- if (other->type == PLACEHOLDER)
- return token;
-
- /* When 'token' is a placeholder, just return 'other'. */
- if (token->type == PLACEHOLDER)
- return other;
-
- /* A very few single-character punctuators can be combined
- * with another to form a multi-character punctuator. */
- switch (token->type) {
- case '<':
- if (other->type == '<')
- combined = _token_create_ival (token, LEFT_SHIFT, LEFT_SHIFT);
- else if (other->type == '=')
- combined = _token_create_ival (token, LESS_OR_EQUAL, LESS_OR_EQUAL);
- break;
- case '>':
- if (other->type == '>')
- combined = _token_create_ival (token, RIGHT_SHIFT, RIGHT_SHIFT);
- else if (other->type == '=')
- combined = _token_create_ival (token, GREATER_OR_EQUAL, GREATER_OR_EQUAL);
- break;
- case '=':
- if (other->type == '=')
- combined = _token_create_ival (token, EQUAL, EQUAL);
- break;
- case '!':
- if (other->type == '=')
- combined = _token_create_ival (token, NOT_EQUAL, NOT_EQUAL);
- break;
- case '&':
- if (other->type == '&')
- combined = _token_create_ival (token, AND, AND);
- break;
- case '|':
- if (other->type == '|')
- combined = _token_create_ival (token, OR, OR);
- break;
- }
-
- if (combined != NULL) {
- /* Inherit the location from the first token */
- combined->location = token->location;
- return combined;
- }
-
- /* Two string-valued tokens can usually just be mashed
- * together.
- *
- * XXX: This isn't actually legitimate. Several things here
- * should result in a diagnostic since the result cannot be a
- * valid, single pre-processing token. For example, pasting
- * "123" and "abc" is not legal, but we don't catch that
- * here. */
- if ((token->type == IDENTIFIER || token->type == OTHER || token->type == INTEGER_STRING) &&
- (other->type == IDENTIFIER || other->type == OTHER || other->type == INTEGER_STRING))
- {
- char *str;
-
- str = ralloc_asprintf (token, "%s%s", token->value.str,
- other->value.str);
- combined = _token_create_str (token, token->type, str);
- combined->location = token->location;
- return combined;
- }
-
- glcpp_error (&token->location, parser, "");
- ralloc_strcat (&parser->info_log, "Pasting \"");
- _token_print (&parser->info_log, token);
- ralloc_strcat (&parser->info_log, "\" and \"");
- _token_print (&parser->info_log, other);
- ralloc_strcat (&parser->info_log, "\" does not give a valid preprocessing token.\n");
-
- return token;
-}
-
-static void
-_token_list_print (glcpp_parser_t *parser, token_list_t *list)
-{
- token_node_t *node;
-
- if (list == NULL)
- return;
-
- for (node = list->head; node; node = node->next)
- _token_print (&parser->output, node->token);
-}
-
-void
-yyerror (YYLTYPE *locp, glcpp_parser_t *parser, const char *error)
-{
- glcpp_error(locp, parser, "%s", error);
-}
-
-static void add_builtin_define(glcpp_parser_t *parser,
- const char *name, int value)
-{
- token_t *tok;
- token_list_t *list;
-
- tok = _token_create_ival (parser, INTEGER, value);
-
- list = _token_list_create(parser);
- _token_list_append(list, tok);
- _define_object_macro(parser, NULL, name, list);
-}
-
-glcpp_parser_t *
-glcpp_parser_create (const struct gl_extensions *extensions, int api)
-{
- glcpp_parser_t *parser;
- int language_version;
-
- parser = ralloc (NULL, glcpp_parser_t);
-
- glcpp_lex_init_extra (parser, &parser->scanner);
- parser->defines = hash_table_ctor (32, hash_table_string_hash,
- hash_table_string_compare);
- parser->active = NULL;
- parser->lexing_if = 0;
- parser->space_tokens = 1;
- parser->newline_as_space = 0;
- parser->in_control_line = 0;
- parser->paren_count = 0;
-
- parser->skip_stack = NULL;
-
- parser->lex_from_list = NULL;
- parser->lex_from_node = NULL;
-
- parser->output = ralloc_strdup(parser, "");
- parser->info_log = ralloc_strdup(parser, "");
- parser->error = 0;
-
- /* Add pre-defined macros. */
- add_builtin_define(parser, "GL_ARB_draw_buffers", 1);
- add_builtin_define(parser, "GL_ARB_texture_rectangle", 1);
-
- if (api == API_OPENGLES2)
- add_builtin_define(parser, "GL_ES", 1);
-
- if (extensions != NULL) {
- if (extensions->EXT_texture_array) {
- add_builtin_define(parser, "GL_EXT_texture_array", 1);
- }
-
- if (extensions->ARB_fragment_coord_conventions)
- add_builtin_define(parser, "GL_ARB_fragment_coord_conventions",
- 1);
-
- if (extensions->ARB_explicit_attrib_location)
- add_builtin_define(parser, "GL_ARB_explicit_attrib_location", 1);
-
- if (extensions->ARB_shader_texture_lod)
- add_builtin_define(parser, "GL_ARB_shader_texture_lod", 1);
-
- if (extensions->AMD_conservative_depth) {
- add_builtin_define(parser, "GL_AMD_conservative_depth", 1);
- add_builtin_define(parser, "GL_ARB_conservative_depth", 1);
- }
- }
-
- language_version = 110;
- add_builtin_define(parser, "__VERSION__", language_version);
-
- return parser;
-}
-
-int
-glcpp_parser_parse (glcpp_parser_t *parser)
-{
- return yyparse (parser);
-}
-
-void
-glcpp_parser_destroy (glcpp_parser_t *parser)
-{
- glcpp_lex_destroy (parser->scanner);
- hash_table_dtor (parser->defines);
- ralloc_free (parser);
-}
-
-typedef enum function_status
-{
- FUNCTION_STATUS_SUCCESS,
- FUNCTION_NOT_A_FUNCTION,
- FUNCTION_UNBALANCED_PARENTHESES
-} function_status_t;
-
-/* Find a set of function-like macro arguments by looking for a
- * balanced set of parentheses.
- *
- * When called, 'node' should be the opening-parenthesis token, (or
- * perhaps preceeding SPACE tokens). Upon successful return *last will
- * be the last consumed node, (corresponding to the closing right
- * parenthesis).
- *
- * Return values:
- *
- * FUNCTION_STATUS_SUCCESS:
- *
- * Successfully parsed a set of function arguments.
- *
- * FUNCTION_NOT_A_FUNCTION:
- *
- * Macro name not followed by a '('. This is not an error, but
- * simply that the macro name should be treated as a non-macro.
- *
- * FUNCTION_UNBALANCED_PARENTHESES
- *
- * Macro name is not followed by a balanced set of parentheses.
- */
-static function_status_t
-_arguments_parse (argument_list_t *arguments,
- token_node_t *node,
- token_node_t **last)
-{
- token_list_t *argument;
- int paren_count;
-
- node = node->next;
-
- /* Ignore whitespace before first parenthesis. */
- while (node && node->token->type == SPACE)
- node = node->next;
-
- if (node == NULL || node->token->type != '(')
- return FUNCTION_NOT_A_FUNCTION;
-
- node = node->next;
-
- argument = _token_list_create (arguments);
- _argument_list_append (arguments, argument);
-
- for (paren_count = 1; node; node = node->next) {
- if (node->token->type == '(')
- {
- paren_count++;
- }
- else if (node->token->type == ')')
- {
- paren_count--;
- if (paren_count == 0)
- break;
- }
-
- if (node->token->type == ',' &&
- paren_count == 1)
- {
- _token_list_trim_trailing_space (argument);
- argument = _token_list_create (arguments);
- _argument_list_append (arguments, argument);
- }
- else {
- if (argument->head == NULL) {
- /* Don't treat initial whitespace as
- * part of the arguement. */
- if (node->token->type == SPACE)
- continue;
- }
- _token_list_append (argument, node->token);
- }
- }
-
- if (paren_count)
- return FUNCTION_UNBALANCED_PARENTHESES;
-
- *last = node;
-
- return FUNCTION_STATUS_SUCCESS;
-}
-
-static token_list_t *
-_token_list_create_with_one_space (void *ctx)
-{
- token_list_t *list;
- token_t *space;
-
- list = _token_list_create (ctx);
- space = _token_create_ival (list, SPACE, SPACE);
- _token_list_append (list, space);
-
- return list;
-}
-
-static void
-_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list)
-{
- token_list_t *expanded;
- token_t *token;
-
- expanded = _token_list_create (parser);
- token = _token_create_ival (parser, type, type);
- _token_list_append (expanded, token);
- _glcpp_parser_expand_token_list (parser, list);
- _token_list_append_list (expanded, list);
- glcpp_parser_lex_from (parser, expanded);
-}
-
-/* This is a helper function that's essentially part of the
- * implementation of _glcpp_parser_expand_node. It shouldn't be called
- * except for by that function.
- *
- * Returns NULL if node is a simple token with no expansion, (that is,
- * although 'node' corresponds to an identifier defined as a
- * function-like macro, it is not followed with a parenthesized
- * argument list).
- *
- * Compute the complete expansion of node (which is a function-like
- * macro) and subsequent nodes which are arguments.
- *
- * Returns the token list that results from the expansion and sets
- * *last to the last node in the list that was consumed by the
- * expansion. Specifically, *last will be set as follows: as the
- * token of the closing right parenthesis.
- */
-static token_list_t *
-_glcpp_parser_expand_function (glcpp_parser_t *parser,
- token_node_t *node,
- token_node_t **last)
-
-{
- macro_t *macro;
- const char *identifier;
- argument_list_t *arguments;
- function_status_t status;
- token_list_t *substituted;
- int parameter_index;
-
- identifier = node->token->value.str;
-
- macro = hash_table_find (parser->defines, identifier);
-
- assert (macro->is_function);
-
- arguments = _argument_list_create (parser);
- status = _arguments_parse (arguments, node, last);
-
- switch (status) {
- case FUNCTION_STATUS_SUCCESS:
- break;
- case FUNCTION_NOT_A_FUNCTION:
- return NULL;
- case FUNCTION_UNBALANCED_PARENTHESES:
- glcpp_error (&node->token->location, parser, "Macro %s call has unbalanced parentheses\n", identifier);
- return NULL;
- }
-
- /* Replace a macro defined as empty with a SPACE token. */
- if (macro->replacements == NULL) {
- ralloc_free (arguments);
- return _token_list_create_with_one_space (parser);
- }
-
- if (! ((_argument_list_length (arguments) ==
- _string_list_length (macro->parameters)) ||
- (_string_list_length (macro->parameters) == 0 &&
- _argument_list_length (arguments) == 1 &&
- arguments->head->argument->head == NULL)))
- {
- glcpp_error (&node->token->location, parser,
- "Error: macro %s invoked with %d arguments (expected %d)\n",
- identifier,
- _argument_list_length (arguments),
- _string_list_length (macro->parameters));
- return NULL;
- }
-
- /* Perform argument substitution on the replacement list. */
- substituted = _token_list_create (arguments);
-
- for (node = macro->replacements->head; node; node = node->next)
- {
- if (node->token->type == IDENTIFIER &&
- _string_list_contains (macro->parameters,
- node->token->value.str,
- &parameter_index))
- {
- token_list_t *argument;
- argument = _argument_list_member_at (arguments,
- parameter_index);
- /* Before substituting, we expand the argument
- * tokens, or append a placeholder token for
- * an empty argument. */
- if (argument->head) {
- token_list_t *expanded_argument;
- expanded_argument = _token_list_copy (parser,
- argument);
- _glcpp_parser_expand_token_list (parser,
- expanded_argument);
- _token_list_append_list (substituted,
- expanded_argument);
- } else {
- token_t *new_token;
-
- new_token = _token_create_ival (substituted,
- PLACEHOLDER,
- PLACEHOLDER);
- _token_list_append (substituted, new_token);
- }
- } else {
- _token_list_append (substituted, node->token);
- }
- }
-
- /* After argument substitution, and before further expansion
- * below, implement token pasting. */
-
- _token_list_trim_trailing_space (substituted);
-
- node = substituted->head;
- while (node)
- {
- token_node_t *next_non_space;
-
- /* Look ahead for a PASTE token, skipping space. */
- next_non_space = node->next;
- while (next_non_space && next_non_space->token->type == SPACE)
- next_non_space = next_non_space->next;
-
- if (next_non_space == NULL)
- break;
-
- if (next_non_space->token->type != PASTE) {
- node = next_non_space;
- continue;
- }
-
- /* Now find the next non-space token after the PASTE. */
- next_non_space = next_non_space->next;
- while (next_non_space && next_non_space->token->type == SPACE)
- next_non_space = next_non_space->next;
-
- if (next_non_space == NULL) {
- yyerror (&node->token->location, parser, "'##' cannot appear at either end of a macro expansion\n");
- return NULL;
- }
-
- node->token = _token_paste (parser, node->token, next_non_space->token);
- node->next = next_non_space->next;
- if (next_non_space == substituted->tail)
- substituted->tail = node;
-
- node = node->next;
- }
-
- substituted->non_space_tail = substituted->tail;
-
- return substituted;
-}
-
-/* Compute the complete expansion of node, (and subsequent nodes after
- * 'node' in the case that 'node' is a function-like macro and
- * subsequent nodes are arguments).
- *
- * Returns NULL if node is a simple token with no expansion.
- *
- * Otherwise, returns the token list that results from the expansion
- * and sets *last to the last node in the list that was consumed by
- * the expansion. Specifically, *last will be set as follows:
- *
- * As 'node' in the case of object-like macro expansion.
- *
- * As the token of the closing right parenthesis in the case of
- * function-like macro expansion.
- */
-static token_list_t *
-_glcpp_parser_expand_node (glcpp_parser_t *parser,
- token_node_t *node,
- token_node_t **last)
-{
- token_t *token = node->token;
- const char *identifier;
- macro_t *macro;
-
- /* We only expand identifiers */
- if (token->type != IDENTIFIER) {
- /* We change any COMMA into a COMMA_FINAL to prevent
- * it being mistaken for an argument separator
- * later. */
- if (token->type == ',') {
- token->type = COMMA_FINAL;
- token->value.ival = COMMA_FINAL;
- }
-
- return NULL;
- }
-
- /* Look up this identifier in the hash table. */
- identifier = token->value.str;
- macro = hash_table_find (parser->defines, identifier);
-
- /* Not a macro, so no expansion needed. */
- if (macro == NULL)
- return NULL;
-
- /* Finally, don't expand this macro if we're already actively
- * expanding it, (to avoid infinite recursion). */
- if (_parser_active_list_contains (parser, identifier)) {
- /* We change the token type here from IDENTIFIER to
- * OTHER to prevent any future expansion of this
- * unexpanded token. */
- char *str;
- token_list_t *expansion;
- token_t *final;
-
- str = ralloc_strdup (parser, token->value.str);
- final = _token_create_str (parser, OTHER, str);
- expansion = _token_list_create (parser);
- _token_list_append (expansion, final);
- *last = node;
- return expansion;
- }
-
- if (! macro->is_function)
- {
- *last = node;
-
- /* Replace a macro defined as empty with a SPACE token. */
- if (macro->replacements == NULL)
- return _token_list_create_with_one_space (parser);
-
- return _token_list_copy (parser, macro->replacements);
- }
-
- return _glcpp_parser_expand_function (parser, node, last);
-}
-
-/* Push a new identifier onto the parser's active list.
- *
- * Here, 'marker' is the token node that appears in the list after the
- * expansion of 'identifier'. That is, when the list iterator begins
- * examining 'marker', then it is time to pop this node from the
- * active stack.
- */
-static void
-_parser_active_list_push (glcpp_parser_t *parser,
- const char *identifier,
- token_node_t *marker)
-{
- active_list_t *node;
-
- node = ralloc (parser->active, active_list_t);
- node->identifier = ralloc_strdup (node, identifier);
- node->marker = marker;
- node->next = parser->active;
-
- parser->active = node;
-}
-
-static void
-_parser_active_list_pop (glcpp_parser_t *parser)
-{
- active_list_t *node = parser->active;
-
- if (node == NULL) {
- parser->active = NULL;
- return;
- }
-
- node = parser->active->next;
- ralloc_free (parser->active);
-
- parser->active = node;
-}
-
-static int
-_parser_active_list_contains (glcpp_parser_t *parser, const char *identifier)
-{
- active_list_t *node;
-
- if (parser->active == NULL)
- return 0;
-
- for (node = parser->active; node; node = node->next)
- if (strcmp (node->identifier, identifier) == 0)
- return 1;
-
- return 0;
-}
-
-/* Walk over the token list replacing nodes with their expansion.
- * Whenever nodes are expanded the walking will walk over the new
- * nodes, continuing to expand as necessary. The results are placed in
- * 'list' itself;
- */
-static void
-_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
- token_list_t *list)
-{
- token_node_t *node_prev;
- token_node_t *node, *last = NULL;
- token_list_t *expansion;
- active_list_t *active_initial = parser->active;
-
- if (list == NULL)
- return;
-
- _token_list_trim_trailing_space (list);
-
- node_prev = NULL;
- node = list->head;
-
- while (node) {
-
- while (parser->active && parser->active->marker == node)
- _parser_active_list_pop (parser);
-
- expansion = _glcpp_parser_expand_node (parser, node, &last);
- if (expansion) {
- token_node_t *n;
-
- for (n = node; n != last->next; n = n->next)
- while (parser->active &&
- parser->active->marker == n)
- {
- _parser_active_list_pop (parser);
- }
-
- _parser_active_list_push (parser,
- node->token->value.str,
- last->next);
-
- /* Splice expansion into list, supporting a
- * simple deletion if the expansion is
- * empty. */
- if (expansion->head) {
- if (node_prev)
- node_prev->next = expansion->head;
- else
- list->head = expansion->head;
- expansion->tail->next = last->next;
- if (last == list->tail)
- list->tail = expansion->tail;
- } else {
- if (node_prev)
- node_prev->next = last->next;
- else
- list->head = last->next;
- if (last == list->tail)
- list->tail = NULL;
- }
- } else {
- node_prev = node;
- }
- node = node_prev ? node_prev->next : list->head;
- }
-
- /* Remove any lingering effects of this invocation on the
- * active list. That is, pop until the list looks like it did
- * at the beginning of this function. */
- while (parser->active && parser->active != active_initial)
- _parser_active_list_pop (parser);
-
- list->non_space_tail = list->tail;
-}
-
-void
-_glcpp_parser_print_expanded_token_list (glcpp_parser_t *parser,
- token_list_t *list)
-{
- if (list == NULL)
- return;
-
- _glcpp_parser_expand_token_list (parser, list);
-
- _token_list_trim_trailing_space (list);
-
- _token_list_print (parser, list);
-}
-
-static void
-_check_for_reserved_macro_name (glcpp_parser_t *parser, YYLTYPE *loc,
- const char *identifier)
-{
- /* According to the GLSL specification, macro names starting with "__"
- * or "GL_" are reserved for future use. So, don't allow them.
- */
- if (strncmp(identifier, "__", 2) == 0) {
- glcpp_error (loc, parser, "Macro names starting with \"__\" are reserved.\n");
- }
- if (strncmp(identifier, "GL_", 3) == 0) {
- glcpp_error (loc, parser, "Macro names starting with \"GL_\" are reserved.\n");
- }
-}
-
-static int
-_macro_equal (macro_t *a, macro_t *b)
-{
- if (a->is_function != b->is_function)
- return 0;
-
- if (a->is_function) {
- if (! _string_list_equal (a->parameters, b->parameters))
- return 0;
- }
-
- return _token_list_equal_ignoring_space (a->replacements,
- b->replacements);
-}
-
-void
-_define_object_macro (glcpp_parser_t *parser,
- YYLTYPE *loc,
- const char *identifier,
- token_list_t *replacements)
-{
- macro_t *macro, *previous;
-
- if (loc != NULL)
- _check_for_reserved_macro_name(parser, loc, identifier);
-
- macro = ralloc (parser, macro_t);
-
- macro->is_function = 0;
- macro->parameters = NULL;
- macro->identifier = ralloc_strdup (macro, identifier);
- macro->replacements = replacements;
- ralloc_steal (macro, replacements);
-
- previous = hash_table_find (parser->defines, identifier);
- if (previous) {
- if (_macro_equal (macro, previous)) {
- ralloc_free (macro);
- return;
- }
- glcpp_error (loc, parser, "Redefinition of macro %s\n",
- identifier);
- }
-
- hash_table_insert (parser->defines, macro, identifier);
-}
-
-void
-_define_function_macro (glcpp_parser_t *parser,
- YYLTYPE *loc,
- const char *identifier,
- string_list_t *parameters,
- token_list_t *replacements)
-{
- macro_t *macro, *previous;
-
- _check_for_reserved_macro_name(parser, loc, identifier);
-
- macro = ralloc (parser, macro_t);
- ralloc_steal (macro, parameters);
- ralloc_steal (macro, replacements);
-
- macro->is_function = 1;
- macro->parameters = parameters;
- macro->identifier = ralloc_strdup (macro, identifier);
- macro->replacements = replacements;
- previous = hash_table_find (parser->defines, identifier);
- if (previous) {
- if (_macro_equal (macro, previous)) {
- ralloc_free (macro);
- return;
- }
- glcpp_error (loc, parser, "Redefinition of macro %s\n",
- identifier);
- }
-
- hash_table_insert (parser->defines, macro, identifier);
-}
-
-static int
-glcpp_parser_lex (YYSTYPE *yylval, YYLTYPE *yylloc, glcpp_parser_t *parser)
-{
- token_node_t *node;
- int ret;
-
- if (parser->lex_from_list == NULL) {
- ret = glcpp_lex (yylval, yylloc, parser->scanner);
-
- /* XXX: This ugly block of code exists for the sole
- * purpose of converting a NEWLINE token into a SPACE
- * token, but only in the case where we have seen a
- * function-like macro name, but have not yet seen its
- * closing parenthesis.
- *
- * There's perhaps a more compact way to do this with
- * mid-rule actions in the grammar.
- *
- * I'm definitely not pleased with the complexity of
- * this code here.
- */
- if (parser->newline_as_space)
- {
- if (ret == '(') {
- parser->paren_count++;
- } else if (ret == ')') {
- parser->paren_count--;
- if (parser->paren_count == 0)
- parser->newline_as_space = 0;
- } else if (ret == NEWLINE) {
- ret = SPACE;
- } else if (ret != SPACE) {
- if (parser->paren_count == 0)
- parser->newline_as_space = 0;
- }
- }
- else if (parser->in_control_line)
- {
- if (ret == NEWLINE)
- parser->in_control_line = 0;
- }
- else if (ret == HASH_DEFINE_OBJ || ret == HASH_DEFINE_FUNC ||
- ret == HASH_UNDEF || ret == HASH_IF ||
- ret == HASH_IFDEF || ret == HASH_IFNDEF ||
- ret == HASH_ELIF || ret == HASH_ELSE ||
- ret == HASH_ENDIF || ret == HASH)
- {
- parser->in_control_line = 1;
- }
- else if (ret == IDENTIFIER)
- {
- macro_t *macro;
- macro = hash_table_find (parser->defines,
- yylval->str);
- if (macro && macro->is_function) {
- parser->newline_as_space = 1;
- parser->paren_count = 0;
- }
- }
-
- return ret;
- }
-
- node = parser->lex_from_node;
-
- if (node == NULL) {
- ralloc_free (parser->lex_from_list);
- parser->lex_from_list = NULL;
- return NEWLINE;
- }
-
- *yylval = node->token->value;
- ret = node->token->type;
-
- parser->lex_from_node = node->next;
-
- return ret;
-}
-
-static void
-glcpp_parser_lex_from (glcpp_parser_t *parser, token_list_t *list)
-{
- token_node_t *node;
-
- assert (parser->lex_from_list == NULL);
-
- /* Copy list, eliminating any space tokens. */
- parser->lex_from_list = _token_list_create (parser);
-
- for (node = list->head; node; node = node->next) {
- if (node->token->type == SPACE)
- continue;
- _token_list_append (parser->lex_from_list, node->token);
- }
-
- ralloc_free (list);
-
- parser->lex_from_node = parser->lex_from_list->head;
-
- /* It's possible the list consisted of nothing but whitespace. */
- if (parser->lex_from_node == NULL) {
- ralloc_free (parser->lex_from_list);
- parser->lex_from_list = NULL;
- }
-}
-
-static void
-_glcpp_parser_skip_stack_push_if (glcpp_parser_t *parser, YYLTYPE *loc,
- int condition)
-{
- skip_type_t current = SKIP_NO_SKIP;
- skip_node_t *node;
-
- if (parser->skip_stack)
- current = parser->skip_stack->type;
-
- node = ralloc (parser, skip_node_t);
- node->loc = *loc;
-
- if (current == SKIP_NO_SKIP) {
- if (condition)
- node->type = SKIP_NO_SKIP;
- else
- node->type = SKIP_TO_ELSE;
- } else {
- node->type = SKIP_TO_ENDIF;
- }
-
- node->next = parser->skip_stack;
- parser->skip_stack = node;
-}
-
-static void
-_glcpp_parser_skip_stack_change_if (glcpp_parser_t *parser, YYLTYPE *loc,
- const char *type, int condition)
-{
- if (parser->skip_stack == NULL) {
- glcpp_error (loc, parser, "%s without #if\n", type);
- return;
- }
-
- if (parser->skip_stack->type == SKIP_TO_ELSE) {
- if (condition)
- parser->skip_stack->type = SKIP_NO_SKIP;
- } else {
- parser->skip_stack->type = SKIP_TO_ENDIF;
- }
-}
-
-static void
-_glcpp_parser_skip_stack_pop (glcpp_parser_t *parser, YYLTYPE *loc)
-{
- skip_node_t *node;
-
- if (parser->skip_stack == NULL) {
- glcpp_error (loc, parser, "#endif without #if\n");
- return;
- }
-
- node = parser->skip_stack;
- parser->skip_stack = node->next;
- ralloc_free (node);
-}
+%{
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <inttypes.h>
+
+#include "glcpp.h"
+#include "main/core.h" /* for struct gl_extensions */
+#include "main/mtypes.h" /* for gl_api enum */
+
+static void
+yyerror (YYLTYPE *locp, glcpp_parser_t *parser, const char *error);
+
+static void
+_define_object_macro (glcpp_parser_t *parser,
+ YYLTYPE *loc,
+ const char *macro,
+ token_list_t *replacements);
+
+static void
+_define_function_macro (glcpp_parser_t *parser,
+ YYLTYPE *loc,
+ const char *macro,
+ string_list_t *parameters,
+ token_list_t *replacements);
+
+static string_list_t *
+_string_list_create (void *ctx);
+
+static void
+_string_list_append_item (string_list_t *list, const char *str);
+
+static int
+_string_list_contains (string_list_t *list, const char *member, int *index);
+
+static int
+_string_list_length (string_list_t *list);
+
+static int
+_string_list_equal (string_list_t *a, string_list_t *b);
+
+static argument_list_t *
+_argument_list_create (void *ctx);
+
+static void
+_argument_list_append (argument_list_t *list, token_list_t *argument);
+
+static int
+_argument_list_length (argument_list_t *list);
+
+static token_list_t *
+_argument_list_member_at (argument_list_t *list, int index);
+
+/* Note: This function ralloc_steal()s the str pointer. */
+static token_t *
+_token_create_str (void *ctx, int type, char *str);
+
+static token_t *
+_token_create_ival (void *ctx, int type, int ival);
+
+static token_list_t *
+_token_list_create (void *ctx);
+
+/* Note: This function calls ralloc_steal on token. */
+static void
+_token_list_append (token_list_t *list, token_t *token);
+
+static void
+_token_list_append_list (token_list_t *list, token_list_t *tail);
+
+static int
+_token_list_equal_ignoring_space (token_list_t *a, token_list_t *b);
+
+static void
+_parser_active_list_push (glcpp_parser_t *parser,
+ const char *identifier,
+ token_node_t *marker);
+
+static void
+_parser_active_list_pop (glcpp_parser_t *parser);
+
+static int
+_parser_active_list_contains (glcpp_parser_t *parser, const char *identifier);
+
+static void
+_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list);
+
+static void
+_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
+ token_list_t *list);
+
+static void
+_glcpp_parser_print_expanded_token_list (glcpp_parser_t *parser,
+ token_list_t *list);
+
+static void
+_glcpp_parser_skip_stack_push_if (glcpp_parser_t *parser, YYLTYPE *loc,
+ int condition);
+
+static void
+_glcpp_parser_skip_stack_change_if (glcpp_parser_t *parser, YYLTYPE *loc,
+ const char *type, int condition);
+
+static void
+_glcpp_parser_skip_stack_pop (glcpp_parser_t *parser, YYLTYPE *loc);
+
+#define yylex glcpp_parser_lex
+
+static int
+glcpp_parser_lex (YYSTYPE *yylval, YYLTYPE *yylloc, glcpp_parser_t *parser);
+
+static void
+glcpp_parser_lex_from (glcpp_parser_t *parser, token_list_t *list);
+
+static void
+add_builtin_define(glcpp_parser_t *parser, const char *name, int value);
+
+%}
+
+%pure-parser
+%error-verbose
+
+%locations
+%initial-action {
+ @$.first_line = 1;
+ @$.first_column = 1;
+ @$.last_line = 1;
+ @$.last_column = 1;
+ @$.source = 0;
+}
+
+%parse-param {glcpp_parser_t *parser}
+%lex-param {glcpp_parser_t *parser}
+
+%expect 0
+%token COMMA_FINAL DEFINED ELIF_EXPANDED HASH HASH_DEFINE_FUNC HASH_DEFINE_OBJ HASH_ELIF HASH_ELSE HASH_ENDIF HASH_IF HASH_IFDEF HASH_IFNDEF HASH_UNDEF HASH_VERSION IDENTIFIER IF_EXPANDED INTEGER INTEGER_STRING NEWLINE OTHER PLACEHOLDER SPACE
+%token PASTE
+%type <ival> expression INTEGER operator SPACE integer_constant
+%type <str> IDENTIFIER INTEGER_STRING OTHER
+%type <string_list> identifier_list
+%type <token> preprocessing_token conditional_token
+%type <token_list> pp_tokens replacement_list text_line conditional_tokens
+%left OR
+%left AND
+%left '|'
+%left '^'
+%left '&'
+%left EQUAL NOT_EQUAL
+%left '<' '>' LESS_OR_EQUAL GREATER_OR_EQUAL
+%left LEFT_SHIFT RIGHT_SHIFT
+%left '+' '-'
+%left '*' '/' '%'
+%right UNARY
+
+%%
+
+input:
+ /* empty */
+| input line
+;
+
+line:
+ control_line {
+ ralloc_strcat (&parser->output, "\n");
+ }
+| text_line {
+ _glcpp_parser_print_expanded_token_list (parser, $1);
+ ralloc_strcat (&parser->output, "\n");
+ ralloc_free ($1);
+ }
+| expanded_line
+| HASH non_directive
+;
+
+expanded_line:
+ IF_EXPANDED expression NEWLINE {
+ _glcpp_parser_skip_stack_push_if (parser, & @1, $2);
+ }
+| ELIF_EXPANDED expression NEWLINE {
+ _glcpp_parser_skip_stack_change_if (parser, & @1, "elif", $2);
+ }
+;
+
+control_line:
+ HASH_DEFINE_OBJ IDENTIFIER replacement_list NEWLINE {
+ _define_object_macro (parser, & @2, $2, $3);
+ }
+| HASH_DEFINE_FUNC IDENTIFIER '(' ')' replacement_list NEWLINE {
+ _define_function_macro (parser, & @2, $2, NULL, $5);
+ }
+| HASH_DEFINE_FUNC IDENTIFIER '(' identifier_list ')' replacement_list NEWLINE {
+ _define_function_macro (parser, & @2, $2, $4, $6);
+ }
+| HASH_UNDEF IDENTIFIER NEWLINE {
+ macro_t *macro = hash_table_find (parser->defines, $2);
+ if (macro) {
+ hash_table_remove (parser->defines, $2);
+ ralloc_free (macro);
+ }
+ ralloc_free ($2);
+ }
+| HASH_IF conditional_tokens NEWLINE {
+ /* Be careful to only evaluate the 'if' expression if
+ * we are not skipping. When we are skipping, we
+ * simply push a new 0-valued 'if' onto the skip
+ * stack.
+ *
+ * This avoids generating diagnostics for invalid
+ * expressions that are being skipped. */
+ if (parser->skip_stack == NULL ||
+ parser->skip_stack->type == SKIP_NO_SKIP)
+ {
+ _glcpp_parser_expand_if (parser, IF_EXPANDED, $2);
+ }
+ else
+ {
+ _glcpp_parser_skip_stack_push_if (parser, & @1, 0);
+ parser->skip_stack->type = SKIP_TO_ENDIF;
+ }
+ }
+| HASH_IF NEWLINE {
+ /* #if without an expression is only an error if we
+ * are not skipping */
+ if (parser->skip_stack == NULL ||
+ parser->skip_stack->type == SKIP_NO_SKIP)
+ {
+ glcpp_error(& @1, parser, "#if with no expression");
+ }
+ _glcpp_parser_skip_stack_push_if (parser, & @1, 0);
+ }
+| HASH_IFDEF IDENTIFIER junk NEWLINE {
+ macro_t *macro = hash_table_find (parser->defines, $2);
+ ralloc_free ($2);
+ _glcpp_parser_skip_stack_push_if (parser, & @1, macro != NULL);
+ }
+| HASH_IFNDEF IDENTIFIER junk NEWLINE {
+ macro_t *macro = hash_table_find (parser->defines, $2);
+ ralloc_free ($2);
+ _glcpp_parser_skip_stack_push_if (parser, & @1, macro == NULL);
+ }
+| HASH_ELIF conditional_tokens NEWLINE {
+ /* Be careful to only evaluate the 'elif' expression
+ * if we are not skipping. When we are skipping, we
+ * simply change to a 0-valued 'elif' on the skip
+ * stack.
+ *
+ * This avoids generating diagnostics for invalid
+ * expressions that are being skipped. */
+ if (parser->skip_stack &&
+ parser->skip_stack->type == SKIP_TO_ELSE)
+ {
+ _glcpp_parser_expand_if (parser, ELIF_EXPANDED, $2);
+ }
+ else
+ {
+ _glcpp_parser_skip_stack_change_if (parser, & @1,
+ "elif", 0);
+ }
+ }
+| HASH_ELIF NEWLINE {
+ /* #elif without an expression is an error unless we
+ * are skipping. */
+ if (parser->skip_stack &&
+ parser->skip_stack->type == SKIP_TO_ELSE)
+ {
+ glcpp_error(& @1, parser, "#elif with no expression");
+ }
+ else
+ {
+ _glcpp_parser_skip_stack_change_if (parser, & @1,
+ "elif", 0);
+ glcpp_warning(& @1, parser, "ignoring illegal #elif without expression");
+ }
+ }
+| HASH_ELSE NEWLINE {
+ _glcpp_parser_skip_stack_change_if (parser, & @1, "else", 1);
+ }
+| HASH_ENDIF NEWLINE {
+ _glcpp_parser_skip_stack_pop (parser, & @1);
+ }
+| HASH_VERSION integer_constant NEWLINE {
+ macro_t *macro = hash_table_find (parser->defines, "__VERSION__");
+ if (macro) {
+ hash_table_remove (parser->defines, "__VERSION__");
+ ralloc_free (macro);
+ }
+ add_builtin_define (parser, "__VERSION__", $2);
+
+ if ($2 == 100)
+ add_builtin_define (parser, "GL_ES", 1);
+
+ /* Currently, all ES2 implementations support highp in the
+ * fragment shader, so we always define this macro in ES2.
+ * If we ever get a driver that doesn't support highp, we'll
+ * need to add a flag to the gl_context and check that here.
+ */
+ if ($2 >= 130 || $2 == 100)
+ add_builtin_define (parser, "GL_FRAGMENT_PRECISION_HIGH", 1);
+
+ ralloc_asprintf_append (&parser->output, "#version %" PRIiMAX, $2);
+ }
+| HASH NEWLINE
+;
+
+integer_constant:
+ INTEGER_STRING {
+ if (strlen ($1) >= 3 && strncmp ($1, "0x", 2) == 0) {
+ $$ = strtoll ($1 + 2, NULL, 16);
+ } else if ($1[0] == '0') {
+ $$ = strtoll ($1, NULL, 8);
+ } else {
+ $$ = strtoll ($1, NULL, 10);
+ }
+ }
+| INTEGER {
+ $$ = $1;
+ }
+
+expression:
+ integer_constant
+| expression OR expression {
+ $$ = $1 || $3;
+ }
+| expression AND expression {
+ $$ = $1 && $3;
+ }
+| expression '|' expression {
+ $$ = $1 | $3;
+ }
+| expression '^' expression {
+ $$ = $1 ^ $3;
+ }
+| expression '&' expression {
+ $$ = $1 & $3;
+ }
+| expression NOT_EQUAL expression {
+ $$ = $1 != $3;
+ }
+| expression EQUAL expression {
+ $$ = $1 == $3;
+ }
+| expression GREATER_OR_EQUAL expression {
+ $$ = $1 >= $3;
+ }
+| expression LESS_OR_EQUAL expression {
+ $$ = $1 <= $3;
+ }
+| expression '>' expression {
+ $$ = $1 > $3;
+ }
+| expression '<' expression {
+ $$ = $1 < $3;
+ }
+| expression RIGHT_SHIFT expression {
+ $$ = $1 >> $3;
+ }
+| expression LEFT_SHIFT expression {
+ $$ = $1 << $3;
+ }
+| expression '-' expression {
+ $$ = $1 - $3;
+ }
+| expression '+' expression {
+ $$ = $1 + $3;
+ }
+| expression '%' expression {
+ if ($3 == 0) {
+ yyerror (& @1, parser,
+ "zero modulus in preprocessor directive");
+ } else {
+ $$ = $1 % $3;
+ }
+ }
+| expression '/' expression {
+ if ($3 == 0) {
+ yyerror (& @1, parser,
+ "division by 0 in preprocessor directive");
+ } else {
+ $$ = $1 / $3;
+ }
+ }
+| expression '*' expression {
+ $$ = $1 * $3;
+ }
+| '!' expression %prec UNARY {
+ $$ = ! $2;
+ }
+| '~' expression %prec UNARY {
+ $$ = ~ $2;
+ }
+| '-' expression %prec UNARY {
+ $$ = - $2;
+ }
+| '+' expression %prec UNARY {
+ $$ = + $2;
+ }
+| '(' expression ')' {
+ $$ = $2;
+ }
+;
+
+identifier_list:
+ IDENTIFIER {
+ $$ = _string_list_create (parser);
+ _string_list_append_item ($$, $1);
+ ralloc_steal ($$, $1);
+ }
+| identifier_list ',' IDENTIFIER {
+ $$ = $1;
+ _string_list_append_item ($$, $3);
+ ralloc_steal ($$, $3);
+ }
+;
+
+text_line:
+ NEWLINE { $$ = NULL; }
+| pp_tokens NEWLINE
+;
+
+non_directive:
+ pp_tokens NEWLINE {
+ yyerror (& @1, parser, "Invalid tokens after #");
+ }
+;
+
+replacement_list:
+ /* empty */ { $$ = NULL; }
+| pp_tokens
+;
+
+junk:
+ /* empty */
+| pp_tokens {
+ glcpp_warning(&@1, parser, "extra tokens at end of directive");
+ }
+;
+
+conditional_token:
+ /* Handle "defined" operator */
+ DEFINED IDENTIFIER {
+ int v = hash_table_find (parser->defines, $2) ? 1 : 0;
+ $$ = _token_create_ival (parser, INTEGER, v);
+ }
+| DEFINED '(' IDENTIFIER ')' {
+ int v = hash_table_find (parser->defines, $3) ? 1 : 0;
+ $$ = _token_create_ival (parser, INTEGER, v);
+ }
+| preprocessing_token
+;
+
+conditional_tokens:
+ /* Exactly the same as pp_tokens, but using conditional_token */
+ conditional_token {
+ $$ = _token_list_create (parser);
+ _token_list_append ($$, $1);
+ }
+| conditional_tokens conditional_token {
+ $$ = $1;
+ _token_list_append ($$, $2);
+ }
+;
+
+pp_tokens:
+ preprocessing_token {
+ parser->space_tokens = 1;
+ $$ = _token_list_create (parser);
+ _token_list_append ($$, $1);
+ }
+| pp_tokens preprocessing_token {
+ $$ = $1;
+ _token_list_append ($$, $2);
+ }
+;
+
+preprocessing_token:
+ IDENTIFIER {
+ $$ = _token_create_str (parser, IDENTIFIER, $1);
+ $$->location = yylloc;
+ }
+| INTEGER_STRING {
+ $$ = _token_create_str (parser, INTEGER_STRING, $1);
+ $$->location = yylloc;
+ }
+| operator {
+ $$ = _token_create_ival (parser, $1, $1);
+ $$->location = yylloc;
+ }
+| OTHER {
+ $$ = _token_create_str (parser, OTHER, $1);
+ $$->location = yylloc;
+ }
+| SPACE {
+ $$ = _token_create_ival (parser, SPACE, SPACE);
+ $$->location = yylloc;
+ }
+;
+
+operator:
+ '[' { $$ = '['; }
+| ']' { $$ = ']'; }
+| '(' { $$ = '('; }
+| ')' { $$ = ')'; }
+| '{' { $$ = '{'; }
+| '}' { $$ = '}'; }
+| '.' { $$ = '.'; }
+| '&' { $$ = '&'; }
+| '*' { $$ = '*'; }
+| '+' { $$ = '+'; }
+| '-' { $$ = '-'; }
+| '~' { $$ = '~'; }
+| '!' { $$ = '!'; }
+| '/' { $$ = '/'; }
+| '%' { $$ = '%'; }
+| LEFT_SHIFT { $$ = LEFT_SHIFT; }
+| RIGHT_SHIFT { $$ = RIGHT_SHIFT; }
+| '<' { $$ = '<'; }
+| '>' { $$ = '>'; }
+| LESS_OR_EQUAL { $$ = LESS_OR_EQUAL; }
+| GREATER_OR_EQUAL { $$ = GREATER_OR_EQUAL; }
+| EQUAL { $$ = EQUAL; }
+| NOT_EQUAL { $$ = NOT_EQUAL; }
+| '^' { $$ = '^'; }
+| '|' { $$ = '|'; }
+| AND { $$ = AND; }
+| OR { $$ = OR; }
+| ';' { $$ = ';'; }
+| ',' { $$ = ','; }
+| '=' { $$ = '='; }
+| PASTE { $$ = PASTE; }
+;
+
+%%
+
+string_list_t *
+_string_list_create (void *ctx)
+{
+ string_list_t *list;
+
+ list = ralloc (ctx, string_list_t);
+ list->head = NULL;
+ list->tail = NULL;
+
+ return list;
+}
+
+void
+_string_list_append_item (string_list_t *list, const char *str)
+{
+ string_node_t *node;
+
+ node = ralloc (list, string_node_t);
+ node->str = ralloc_strdup (node, str);
+
+ node->next = NULL;
+
+ if (list->head == NULL) {
+ list->head = node;
+ } else {
+ list->tail->next = node;
+ }
+
+ list->tail = node;
+}
+
+int
+_string_list_contains (string_list_t *list, const char *member, int *index)
+{
+ string_node_t *node;
+ int i;
+
+ if (list == NULL)
+ return 0;
+
+ for (i = 0, node = list->head; node; i++, node = node->next) {
+ if (strcmp (node->str, member) == 0) {
+ if (index)
+ *index = i;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int
+_string_list_length (string_list_t *list)
+{
+ int length = 0;
+ string_node_t *node;
+
+ if (list == NULL)
+ return 0;
+
+ for (node = list->head; node; node = node->next)
+ length++;
+
+ return length;
+}
+
+int
+_string_list_equal (string_list_t *a, string_list_t *b)
+{
+ string_node_t *node_a, *node_b;
+
+ if (a == NULL && b == NULL)
+ return 1;
+
+ if (a == NULL || b == NULL)
+ return 0;
+
+ for (node_a = a->head, node_b = b->head;
+ node_a && node_b;
+ node_a = node_a->next, node_b = node_b->next)
+ {
+ if (strcmp (node_a->str, node_b->str))
+ return 0;
+ }
+
+ /* Catch the case of lists being different lengths, (which
+ * would cause the loop above to terminate after the shorter
+ * list). */
+ return node_a == node_b;
+}
+
+argument_list_t *
+_argument_list_create (void *ctx)
+{
+ argument_list_t *list;
+
+ list = ralloc (ctx, argument_list_t);
+ list->head = NULL;
+ list->tail = NULL;
+
+ return list;
+}
+
+void
+_argument_list_append (argument_list_t *list, token_list_t *argument)
+{
+ argument_node_t *node;
+
+ node = ralloc (list, argument_node_t);
+ node->argument = argument;
+
+ node->next = NULL;
+
+ if (list->head == NULL) {
+ list->head = node;
+ } else {
+ list->tail->next = node;
+ }
+
+ list->tail = node;
+}
+
+int
+_argument_list_length (argument_list_t *list)
+{
+ int length = 0;
+ argument_node_t *node;
+
+ if (list == NULL)
+ return 0;
+
+ for (node = list->head; node; node = node->next)
+ length++;
+
+ return length;
+}
+
+token_list_t *
+_argument_list_member_at (argument_list_t *list, int index)
+{
+ argument_node_t *node;
+ int i;
+
+ if (list == NULL)
+ return NULL;
+
+ node = list->head;
+ for (i = 0; i < index; i++) {
+ node = node->next;
+ if (node == NULL)
+ break;
+ }
+
+ if (node)
+ return node->argument;
+
+ return NULL;
+}
+
+/* Note: This function ralloc_steal()s the str pointer. */
+token_t *
+_token_create_str (void *ctx, int type, char *str)
+{
+ token_t *token;
+
+ token = ralloc (ctx, token_t);
+ token->type = type;
+ token->value.str = str;
+
+ ralloc_steal (token, str);
+
+ return token;
+}
+
+token_t *
+_token_create_ival (void *ctx, int type, int ival)
+{
+ token_t *token;
+
+ token = ralloc (ctx, token_t);
+ token->type = type;
+ token->value.ival = ival;
+
+ return token;
+}
+
+token_list_t *
+_token_list_create (void *ctx)
+{
+ token_list_t *list;
+
+ list = ralloc (ctx, token_list_t);
+ list->head = NULL;
+ list->tail = NULL;
+ list->non_space_tail = NULL;
+
+ return list;
+}
+
+void
+_token_list_append (token_list_t *list, token_t *token)
+{
+ token_node_t *node;
+
+ node = ralloc (list, token_node_t);
+ node->token = token;
+ node->next = NULL;
+
+ ralloc_steal (list, token);
+
+ if (list->head == NULL) {
+ list->head = node;
+ } else {
+ list->tail->next = node;
+ }
+
+ list->tail = node;
+ if (token->type != SPACE)
+ list->non_space_tail = node;
+}
+
+void
+_token_list_append_list (token_list_t *list, token_list_t *tail)
+{
+ if (tail == NULL || tail->head == NULL)
+ return;
+
+ if (list->head == NULL) {
+ list->head = tail->head;
+ } else {
+ list->tail->next = tail->head;
+ }
+
+ list->tail = tail->tail;
+ list->non_space_tail = tail->non_space_tail;
+}
+
+static token_list_t *
+_token_list_copy (void *ctx, token_list_t *other)
+{
+ token_list_t *copy;
+ token_node_t *node;
+
+ if (other == NULL)
+ return NULL;
+
+ copy = _token_list_create (ctx);
+ for (node = other->head; node; node = node->next) {
+ token_t *new_token = ralloc (copy, token_t);
+ *new_token = *node->token;
+ _token_list_append (copy, new_token);
+ }
+
+ return copy;
+}
+
+static void
+_token_list_trim_trailing_space (token_list_t *list)
+{
+ token_node_t *tail, *next;
+
+ if (list->non_space_tail) {
+ tail = list->non_space_tail->next;
+ list->non_space_tail->next = NULL;
+ list->tail = list->non_space_tail;
+
+ while (tail) {
+ next = tail->next;
+ ralloc_free (tail);
+ tail = next;
+ }
+ }
+}
+
+static int
+_token_list_is_empty_ignoring_space (token_list_t *l)
+{
+ token_node_t *n;
+
+ if (l == NULL)
+ return 1;
+
+ n = l->head;
+ while (n != NULL && n->token->type == SPACE)
+ n = n->next;
+
+ return n == NULL;
+}
+
+int
+_token_list_equal_ignoring_space (token_list_t *a, token_list_t *b)
+{
+ token_node_t *node_a, *node_b;
+
+ if (a == NULL || b == NULL) {
+ int a_empty = _token_list_is_empty_ignoring_space(a);
+ int b_empty = _token_list_is_empty_ignoring_space(b);
+ return a_empty == b_empty;
+ }
+
+ node_a = a->head;
+ node_b = b->head;
+
+ while (1)
+ {
+ if (node_a == NULL && node_b == NULL)
+ break;
+
+ if (node_a == NULL || node_b == NULL)
+ return 0;
+
+ if (node_a->token->type == SPACE) {
+ node_a = node_a->next;
+ continue;
+ }
+
+ if (node_b->token->type == SPACE) {
+ node_b = node_b->next;
+ continue;
+ }
+
+ if (node_a->token->type != node_b->token->type)
+ return 0;
+
+ switch (node_a->token->type) {
+ case INTEGER:
+ if (node_a->token->value.ival !=
+ node_b->token->value.ival)
+ {
+ return 0;
+ }
+ break;
+ case IDENTIFIER:
+ case INTEGER_STRING:
+ case OTHER:
+ if (strcmp (node_a->token->value.str,
+ node_b->token->value.str))
+ {
+ return 0;
+ }
+ break;
+ }
+
+ node_a = node_a->next;
+ node_b = node_b->next;
+ }
+
+ return 1;
+}
+
+static void
+_token_print (char **out, token_t *token)
+{
+ if (token->type < 256) {
+ ralloc_asprintf_append (out, "%c", token->type);
+ return;
+ }
+
+ switch (token->type) {
+ case INTEGER:
+ ralloc_asprintf_append (out, "%" PRIiMAX, token->value.ival);
+ break;
+ case IDENTIFIER:
+ case INTEGER_STRING:
+ case OTHER:
+ ralloc_strcat (out, token->value.str);
+ break;
+ case SPACE:
+ ralloc_strcat (out, " ");
+ break;
+ case LEFT_SHIFT:
+ ralloc_strcat (out, "<<");
+ break;
+ case RIGHT_SHIFT:
+ ralloc_strcat (out, ">>");
+ break;
+ case LESS_OR_EQUAL:
+ ralloc_strcat (out, "<=");
+ break;
+ case GREATER_OR_EQUAL:
+ ralloc_strcat (out, ">=");
+ break;
+ case EQUAL:
+ ralloc_strcat (out, "==");
+ break;
+ case NOT_EQUAL:
+ ralloc_strcat (out, "!=");
+ break;
+ case AND:
+ ralloc_strcat (out, "&&");
+ break;
+ case OR:
+ ralloc_strcat (out, "||");
+ break;
+ case PASTE:
+ ralloc_strcat (out, "##");
+ break;
+ case COMMA_FINAL:
+ ralloc_strcat (out, ",");
+ break;
+ case PLACEHOLDER:
+ /* Nothing to print. */
+ break;
+ default:
+ assert(!"Error: Don't know how to print token.");
+ break;
+ }
+}
+
+/* Return a new token (ralloc()ed off of 'token') formed by pasting
+ * 'token' and 'other'. Note that this function may return 'token' or
+ * 'other' directly rather than allocating anything new.
+ *
+ * Caution: Only very cursory error-checking is performed to see if
+ * the final result is a valid single token. */
+static token_t *
+_token_paste (glcpp_parser_t *parser, token_t *token, token_t *other)
+{
+ token_t *combined = NULL;
+
+ /* Pasting a placeholder onto anything makes no change. */
+ if (other->type == PLACEHOLDER)
+ return token;
+
+ /* When 'token' is a placeholder, just return 'other'. */
+ if (token->type == PLACEHOLDER)
+ return other;
+
+ /* A very few single-character punctuators can be combined
+ * with another to form a multi-character punctuator. */
+ switch (token->type) {
+ case '<':
+ if (other->type == '<')
+ combined = _token_create_ival (token, LEFT_SHIFT, LEFT_SHIFT);
+ else if (other->type == '=')
+ combined = _token_create_ival (token, LESS_OR_EQUAL, LESS_OR_EQUAL);
+ break;
+ case '>':
+ if (other->type == '>')
+ combined = _token_create_ival (token, RIGHT_SHIFT, RIGHT_SHIFT);
+ else if (other->type == '=')
+ combined = _token_create_ival (token, GREATER_OR_EQUAL, GREATER_OR_EQUAL);
+ break;
+ case '=':
+ if (other->type == '=')
+ combined = _token_create_ival (token, EQUAL, EQUAL);
+ break;
+ case '!':
+ if (other->type == '=')
+ combined = _token_create_ival (token, NOT_EQUAL, NOT_EQUAL);
+ break;
+ case '&':
+ if (other->type == '&')
+ combined = _token_create_ival (token, AND, AND);
+ break;
+ case '|':
+ if (other->type == '|')
+ combined = _token_create_ival (token, OR, OR);
+ break;
+ }
+
+ if (combined != NULL) {
+ /* Inherit the location from the first token */
+ combined->location = token->location;
+ return combined;
+ }
+
+ /* Two string-valued tokens can usually just be mashed
+ * together.
+ *
+ * XXX: This isn't actually legitimate. Several things here
+ * should result in a diagnostic since the result cannot be a
+ * valid, single pre-processing token. For example, pasting
+ * "123" and "abc" is not legal, but we don't catch that
+ * here. */
+ if ((token->type == IDENTIFIER || token->type == OTHER || token->type == INTEGER_STRING) &&
+ (other->type == IDENTIFIER || other->type == OTHER || other->type == INTEGER_STRING))
+ {
+ char *str;
+
+ str = ralloc_asprintf (token, "%s%s", token->value.str,
+ other->value.str);
+ combined = _token_create_str (token, token->type, str);
+ combined->location = token->location;
+ return combined;
+ }
+
+ glcpp_error (&token->location, parser, "");
+ ralloc_strcat (&parser->info_log, "Pasting \"");
+ _token_print (&parser->info_log, token);
+ ralloc_strcat (&parser->info_log, "\" and \"");
+ _token_print (&parser->info_log, other);
+ ralloc_strcat (&parser->info_log, "\" does not give a valid preprocessing token.\n");
+
+ return token;
+}
+
+static void
+_token_list_print (glcpp_parser_t *parser, token_list_t *list)
+{
+ token_node_t *node;
+
+ if (list == NULL)
+ return;
+
+ for (node = list->head; node; node = node->next)
+ _token_print (&parser->output, node->token);
+}
+
+void
+yyerror (YYLTYPE *locp, glcpp_parser_t *parser, const char *error)
+{
+ glcpp_error(locp, parser, "%s", error);
+}
+
+static void add_builtin_define(glcpp_parser_t *parser,
+ const char *name, int value)
+{
+ token_t *tok;
+ token_list_t *list;
+
+ tok = _token_create_ival (parser, INTEGER, value);
+
+ list = _token_list_create(parser);
+ _token_list_append(list, tok);
+ _define_object_macro(parser, NULL, name, list);
+}
+
+glcpp_parser_t *
+glcpp_parser_create (const struct gl_extensions *extensions, int api)
+{
+ glcpp_parser_t *parser;
+ int language_version;
+
+ parser = ralloc (NULL, glcpp_parser_t);
+
+ glcpp_lex_init_extra (parser, &parser->scanner);
+ parser->defines = hash_table_ctor (32, hash_table_string_hash,
+ hash_table_string_compare);
+ parser->active = NULL;
+ parser->lexing_if = 0;
+ parser->space_tokens = 1;
+ parser->newline_as_space = 0;
+ parser->in_control_line = 0;
+ parser->paren_count = 0;
+
+ parser->skip_stack = NULL;
+
+ parser->lex_from_list = NULL;
+ parser->lex_from_node = NULL;
+
+ parser->output = ralloc_strdup(parser, "");
+ parser->info_log = ralloc_strdup(parser, "");
+ parser->error = 0;
+
+ /* Add pre-defined macros. */
+ add_builtin_define(parser, "GL_ARB_draw_buffers", 1);
+ add_builtin_define(parser, "GL_ARB_texture_rectangle", 1);
+
+ if (api == API_OPENGLES2)
+ add_builtin_define(parser, "GL_ES", 1);
+
+ if (extensions != NULL) {
+ if (extensions->EXT_texture_array) {
+ add_builtin_define(parser, "GL_EXT_texture_array", 1);
+ }
+
+ if (extensions->ARB_fragment_coord_conventions)
+ add_builtin_define(parser, "GL_ARB_fragment_coord_conventions",
+ 1);
+
+ if (extensions->ARB_explicit_attrib_location)
+ add_builtin_define(parser, "GL_ARB_explicit_attrib_location", 1);
+
+ if (extensions->ARB_shader_texture_lod)
+ add_builtin_define(parser, "GL_ARB_shader_texture_lod", 1);
+
+ if (extensions->AMD_conservative_depth) {
+ add_builtin_define(parser, "GL_AMD_conservative_depth", 1);
+ add_builtin_define(parser, "GL_ARB_conservative_depth", 1);
+ }
+ }
+
+ language_version = 110;
+ add_builtin_define(parser, "__VERSION__", language_version);
+
+ return parser;
+}
+
+int
+glcpp_parser_parse (glcpp_parser_t *parser)
+{
+ return yyparse (parser);
+}
+
+void
+glcpp_parser_destroy (glcpp_parser_t *parser)
+{
+ glcpp_lex_destroy (parser->scanner);
+ hash_table_dtor (parser->defines);
+ ralloc_free (parser);
+}
+
+typedef enum function_status
+{
+ FUNCTION_STATUS_SUCCESS,
+ FUNCTION_NOT_A_FUNCTION,
+ FUNCTION_UNBALANCED_PARENTHESES
+} function_status_t;
+
+/* Find a set of function-like macro arguments by looking for a
+ * balanced set of parentheses.
+ *
+ * When called, 'node' should be the opening-parenthesis token, (or
+ * perhaps preceeding SPACE tokens). Upon successful return *last will
+ * be the last consumed node, (corresponding to the closing right
+ * parenthesis).
+ *
+ * Return values:
+ *
+ * FUNCTION_STATUS_SUCCESS:
+ *
+ * Successfully parsed a set of function arguments.
+ *
+ * FUNCTION_NOT_A_FUNCTION:
+ *
+ * Macro name not followed by a '('. This is not an error, but
+ * simply that the macro name should be treated as a non-macro.
+ *
+ * FUNCTION_UNBALANCED_PARENTHESES
+ *
+ * Macro name is not followed by a balanced set of parentheses.
+ */
+static function_status_t
+_arguments_parse (argument_list_t *arguments,
+ token_node_t *node,
+ token_node_t **last)
+{
+ token_list_t *argument;
+ int paren_count;
+
+ node = node->next;
+
+ /* Ignore whitespace before first parenthesis. */
+ while (node && node->token->type == SPACE)
+ node = node->next;
+
+ if (node == NULL || node->token->type != '(')
+ return FUNCTION_NOT_A_FUNCTION;
+
+ node = node->next;
+
+ argument = _token_list_create (arguments);
+ _argument_list_append (arguments, argument);
+
+ for (paren_count = 1; node; node = node->next) {
+ if (node->token->type == '(')
+ {
+ paren_count++;
+ }
+ else if (node->token->type == ')')
+ {
+ paren_count--;
+ if (paren_count == 0)
+ break;
+ }
+
+ if (node->token->type == ',' &&
+ paren_count == 1)
+ {
+ _token_list_trim_trailing_space (argument);
+ argument = _token_list_create (arguments);
+ _argument_list_append (arguments, argument);
+ }
+ else {
+ if (argument->head == NULL) {
+ /* Don't treat initial whitespace as
+ * part of the arguement. */
+ if (node->token->type == SPACE)
+ continue;
+ }
+ _token_list_append (argument, node->token);
+ }
+ }
+
+ if (paren_count)
+ return FUNCTION_UNBALANCED_PARENTHESES;
+
+ *last = node;
+
+ return FUNCTION_STATUS_SUCCESS;
+}
+
+static token_list_t *
+_token_list_create_with_one_space (void *ctx)
+{
+ token_list_t *list;
+ token_t *space;
+
+ list = _token_list_create (ctx);
+ space = _token_create_ival (list, SPACE, SPACE);
+ _token_list_append (list, space);
+
+ return list;
+}
+
+static void
+_glcpp_parser_expand_if (glcpp_parser_t *parser, int type, token_list_t *list)
+{
+ token_list_t *expanded;
+ token_t *token;
+
+ expanded = _token_list_create (parser);
+ token = _token_create_ival (parser, type, type);
+ _token_list_append (expanded, token);
+ _glcpp_parser_expand_token_list (parser, list);
+ _token_list_append_list (expanded, list);
+ glcpp_parser_lex_from (parser, expanded);
+}
+
+/* This is a helper function that's essentially part of the
+ * implementation of _glcpp_parser_expand_node. It shouldn't be called
+ * except for by that function.
+ *
+ * Returns NULL if node is a simple token with no expansion, (that is,
+ * although 'node' corresponds to an identifier defined as a
+ * function-like macro, it is not followed with a parenthesized
+ * argument list).
+ *
+ * Compute the complete expansion of node (which is a function-like
+ * macro) and subsequent nodes which are arguments.
+ *
+ * Returns the token list that results from the expansion and sets
+ * *last to the last node in the list that was consumed by the
+ * expansion. Specifically, *last will be set as follows: as the
+ * token of the closing right parenthesis.
+ */
+static token_list_t *
+_glcpp_parser_expand_function (glcpp_parser_t *parser,
+ token_node_t *node,
+ token_node_t **last)
+
+{
+ macro_t *macro;
+ const char *identifier;
+ argument_list_t *arguments;
+ function_status_t status;
+ token_list_t *substituted;
+ int parameter_index;
+
+ identifier = node->token->value.str;
+
+ macro = hash_table_find (parser->defines, identifier);
+
+ assert (macro->is_function);
+
+ arguments = _argument_list_create (parser);
+ status = _arguments_parse (arguments, node, last);
+
+ switch (status) {
+ case FUNCTION_STATUS_SUCCESS:
+ break;
+ case FUNCTION_NOT_A_FUNCTION:
+ return NULL;
+ case FUNCTION_UNBALANCED_PARENTHESES:
+ glcpp_error (&node->token->location, parser, "Macro %s call has unbalanced parentheses\n", identifier);
+ return NULL;
+ }
+
+ /* Replace a macro defined as empty with a SPACE token. */
+ if (macro->replacements == NULL) {
+ ralloc_free (arguments);
+ return _token_list_create_with_one_space (parser);
+ }
+
+ if (! ((_argument_list_length (arguments) ==
+ _string_list_length (macro->parameters)) ||
+ (_string_list_length (macro->parameters) == 0 &&
+ _argument_list_length (arguments) == 1 &&
+ arguments->head->argument->head == NULL)))
+ {
+ glcpp_error (&node->token->location, parser,
+ "Error: macro %s invoked with %d arguments (expected %d)\n",
+ identifier,
+ _argument_list_length (arguments),
+ _string_list_length (macro->parameters));
+ return NULL;
+ }
+
+ /* Perform argument substitution on the replacement list. */
+ substituted = _token_list_create (arguments);
+
+ for (node = macro->replacements->head; node; node = node->next)
+ {
+ if (node->token->type == IDENTIFIER &&
+ _string_list_contains (macro->parameters,
+ node->token->value.str,
+ &parameter_index))
+ {
+ token_list_t *argument;
+ argument = _argument_list_member_at (arguments,
+ parameter_index);
+ /* Before substituting, we expand the argument
+ * tokens, or append a placeholder token for
+ * an empty argument. */
+ if (argument->head) {
+ token_list_t *expanded_argument;
+ expanded_argument = _token_list_copy (parser,
+ argument);
+ _glcpp_parser_expand_token_list (parser,
+ expanded_argument);
+ _token_list_append_list (substituted,
+ expanded_argument);
+ } else {
+ token_t *new_token;
+
+ new_token = _token_create_ival (substituted,
+ PLACEHOLDER,
+ PLACEHOLDER);
+ _token_list_append (substituted, new_token);
+ }
+ } else {
+ _token_list_append (substituted, node->token);
+ }
+ }
+
+ /* After argument substitution, and before further expansion
+ * below, implement token pasting. */
+
+ _token_list_trim_trailing_space (substituted);
+
+ node = substituted->head;
+ while (node)
+ {
+ token_node_t *next_non_space;
+
+ /* Look ahead for a PASTE token, skipping space. */
+ next_non_space = node->next;
+ while (next_non_space && next_non_space->token->type == SPACE)
+ next_non_space = next_non_space->next;
+
+ if (next_non_space == NULL)
+ break;
+
+ if (next_non_space->token->type != PASTE) {
+ node = next_non_space;
+ continue;
+ }
+
+ /* Now find the next non-space token after the PASTE. */
+ next_non_space = next_non_space->next;
+ while (next_non_space && next_non_space->token->type == SPACE)
+ next_non_space = next_non_space->next;
+
+ if (next_non_space == NULL) {
+ yyerror (&node->token->location, parser, "'##' cannot appear at either end of a macro expansion\n");
+ return NULL;
+ }
+
+ node->token = _token_paste (parser, node->token, next_non_space->token);
+ node->next = next_non_space->next;
+ if (next_non_space == substituted->tail)
+ substituted->tail = node;
+
+ node = node->next;
+ }
+
+ substituted->non_space_tail = substituted->tail;
+
+ return substituted;
+}
+
+/* Compute the complete expansion of node, (and subsequent nodes after
+ * 'node' in the case that 'node' is a function-like macro and
+ * subsequent nodes are arguments).
+ *
+ * Returns NULL if node is a simple token with no expansion.
+ *
+ * Otherwise, returns the token list that results from the expansion
+ * and sets *last to the last node in the list that was consumed by
+ * the expansion. Specifically, *last will be set as follows:
+ *
+ * As 'node' in the case of object-like macro expansion.
+ *
+ * As the token of the closing right parenthesis in the case of
+ * function-like macro expansion.
+ */
+static token_list_t *
+_glcpp_parser_expand_node (glcpp_parser_t *parser,
+ token_node_t *node,
+ token_node_t **last)
+{
+ token_t *token = node->token;
+ const char *identifier;
+ macro_t *macro;
+
+ /* We only expand identifiers */
+ if (token->type != IDENTIFIER) {
+ /* We change any COMMA into a COMMA_FINAL to prevent
+ * it being mistaken for an argument separator
+ * later. */
+ if (token->type == ',') {
+ token->type = COMMA_FINAL;
+ token->value.ival = COMMA_FINAL;
+ }
+
+ return NULL;
+ }
+
+ /* Look up this identifier in the hash table. */
+ identifier = token->value.str;
+ macro = hash_table_find (parser->defines, identifier);
+
+ /* Not a macro, so no expansion needed. */
+ if (macro == NULL)
+ return NULL;
+
+ /* Finally, don't expand this macro if we're already actively
+ * expanding it, (to avoid infinite recursion). */
+ if (_parser_active_list_contains (parser, identifier)) {
+ /* We change the token type here from IDENTIFIER to
+ * OTHER to prevent any future expansion of this
+ * unexpanded token. */
+ char *str;
+ token_list_t *expansion;
+ token_t *final;
+
+ str = ralloc_strdup (parser, token->value.str);
+ final = _token_create_str (parser, OTHER, str);
+ expansion = _token_list_create (parser);
+ _token_list_append (expansion, final);
+ *last = node;
+ return expansion;
+ }
+
+ if (! macro->is_function)
+ {
+ *last = node;
+
+ /* Replace a macro defined as empty with a SPACE token. */
+ if (macro->replacements == NULL)
+ return _token_list_create_with_one_space (parser);
+
+ return _token_list_copy (parser, macro->replacements);
+ }
+
+ return _glcpp_parser_expand_function (parser, node, last);
+}
+
+/* Push a new identifier onto the parser's active list.
+ *
+ * Here, 'marker' is the token node that appears in the list after the
+ * expansion of 'identifier'. That is, when the list iterator begins
+ * examining 'marker', then it is time to pop this node from the
+ * active stack.
+ */
+static void
+_parser_active_list_push (glcpp_parser_t *parser,
+ const char *identifier,
+ token_node_t *marker)
+{
+ active_list_t *node;
+
+ node = ralloc (parser->active, active_list_t);
+ node->identifier = ralloc_strdup (node, identifier);
+ node->marker = marker;
+ node->next = parser->active;
+
+ parser->active = node;
+}
+
+static void
+_parser_active_list_pop (glcpp_parser_t *parser)
+{
+ active_list_t *node = parser->active;
+
+ if (node == NULL) {
+ parser->active = NULL;
+ return;
+ }
+
+ node = parser->active->next;
+ ralloc_free (parser->active);
+
+ parser->active = node;
+}
+
+static int
+_parser_active_list_contains (glcpp_parser_t *parser, const char *identifier)
+{
+ active_list_t *node;
+
+ if (parser->active == NULL)
+ return 0;
+
+ for (node = parser->active; node; node = node->next)
+ if (strcmp (node->identifier, identifier) == 0)
+ return 1;
+
+ return 0;
+}
+
+/* Walk over the token list replacing nodes with their expansion.
+ * Whenever nodes are expanded the walking will walk over the new
+ * nodes, continuing to expand as necessary. The results are placed in
+ * 'list' itself;
+ */
+static void
+_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
+ token_list_t *list)
+{
+ token_node_t *node_prev;
+ token_node_t *node, *last = NULL;
+ token_list_t *expansion;
+ active_list_t *active_initial = parser->active;
+
+ if (list == NULL)
+ return;
+
+ _token_list_trim_trailing_space (list);
+
+ node_prev = NULL;
+ node = list->head;
+
+ while (node) {
+
+ while (parser->active && parser->active->marker == node)
+ _parser_active_list_pop (parser);
+
+ expansion = _glcpp_parser_expand_node (parser, node, &last);
+ if (expansion) {
+ token_node_t *n;
+
+ for (n = node; n != last->next; n = n->next)
+ while (parser->active &&
+ parser->active->marker == n)
+ {
+ _parser_active_list_pop (parser);
+ }
+
+ _parser_active_list_push (parser,
+ node->token->value.str,
+ last->next);
+
+ /* Splice expansion into list, supporting a
+ * simple deletion if the expansion is
+ * empty. */
+ if (expansion->head) {
+ if (node_prev)
+ node_prev->next = expansion->head;
+ else
+ list->head = expansion->head;
+ expansion->tail->next = last->next;
+ if (last == list->tail)
+ list->tail = expansion->tail;
+ } else {
+ if (node_prev)
+ node_prev->next = last->next;
+ else
+ list->head = last->next;
+ if (last == list->tail)
+ list->tail = NULL;
+ }
+ } else {
+ node_prev = node;
+ }
+ node = node_prev ? node_prev->next : list->head;
+ }
+
+ /* Remove any lingering effects of this invocation on the
+ * active list. That is, pop until the list looks like it did
+ * at the beginning of this function. */
+ while (parser->active && parser->active != active_initial)
+ _parser_active_list_pop (parser);
+
+ list->non_space_tail = list->tail;
+}
+
+void
+_glcpp_parser_print_expanded_token_list (glcpp_parser_t *parser,
+ token_list_t *list)
+{
+ if (list == NULL)
+ return;
+
+ _glcpp_parser_expand_token_list (parser, list);
+
+ _token_list_trim_trailing_space (list);
+
+ _token_list_print (parser, list);
+}
+
+static void
+_check_for_reserved_macro_name (glcpp_parser_t *parser, YYLTYPE *loc,
+ const char *identifier)
+{
+ /* According to the GLSL specification, macro names starting with "__"
+ * or "GL_" are reserved for future use. So, don't allow them.
+ */
+ if (strncmp(identifier, "__", 2) == 0) {
+ glcpp_error (loc, parser, "Macro names starting with \"__\" are reserved.\n");
+ }
+ if (strncmp(identifier, "GL_", 3) == 0) {
+ glcpp_error (loc, parser, "Macro names starting with \"GL_\" are reserved.\n");
+ }
+}
+
+static int
+_macro_equal (macro_t *a, macro_t *b)
+{
+ if (a->is_function != b->is_function)
+ return 0;
+
+ if (a->is_function) {
+ if (! _string_list_equal (a->parameters, b->parameters))
+ return 0;
+ }
+
+ return _token_list_equal_ignoring_space (a->replacements,
+ b->replacements);
+}
+
+void
+_define_object_macro (glcpp_parser_t *parser,
+ YYLTYPE *loc,
+ const char *identifier,
+ token_list_t *replacements)
+{
+ macro_t *macro, *previous;
+
+ if (loc != NULL)
+ _check_for_reserved_macro_name(parser, loc, identifier);
+
+ macro = ralloc (parser, macro_t);
+
+ macro->is_function = 0;
+ macro->parameters = NULL;
+ macro->identifier = ralloc_strdup (macro, identifier);
+ macro->replacements = replacements;
+ ralloc_steal (macro, replacements);
+
+ previous = hash_table_find (parser->defines, identifier);
+ if (previous) {
+ if (_macro_equal (macro, previous)) {
+ ralloc_free (macro);
+ return;
+ }
+ glcpp_error (loc, parser, "Redefinition of macro %s\n",
+ identifier);
+ }
+
+ hash_table_insert (parser->defines, macro, identifier);
+}
+
+void
+_define_function_macro (glcpp_parser_t *parser,
+ YYLTYPE *loc,
+ const char *identifier,
+ string_list_t *parameters,
+ token_list_t *replacements)
+{
+ macro_t *macro, *previous;
+
+ _check_for_reserved_macro_name(parser, loc, identifier);
+
+ macro = ralloc (parser, macro_t);
+ ralloc_steal (macro, parameters);
+ ralloc_steal (macro, replacements);
+
+ macro->is_function = 1;
+ macro->parameters = parameters;
+ macro->identifier = ralloc_strdup (macro, identifier);
+ macro->replacements = replacements;
+ previous = hash_table_find (parser->defines, identifier);
+ if (previous) {
+ if (_macro_equal (macro, previous)) {
+ ralloc_free (macro);
+ return;
+ }
+ glcpp_error (loc, parser, "Redefinition of macro %s\n",
+ identifier);
+ }
+
+ hash_table_insert (parser->defines, macro, identifier);
+}
+
+static int
+glcpp_parser_lex (YYSTYPE *yylval, YYLTYPE *yylloc, glcpp_parser_t *parser)
+{
+ token_node_t *node;
+ int ret;
+
+ if (parser->lex_from_list == NULL) {
+ ret = glcpp_lex (yylval, yylloc, parser->scanner);
+
+ /* XXX: This ugly block of code exists for the sole
+ * purpose of converting a NEWLINE token into a SPACE
+ * token, but only in the case where we have seen a
+ * function-like macro name, but have not yet seen its
+ * closing parenthesis.
+ *
+ * There's perhaps a more compact way to do this with
+ * mid-rule actions in the grammar.
+ *
+ * I'm definitely not pleased with the complexity of
+ * this code here.
+ */
+ if (parser->newline_as_space)
+ {
+ if (ret == '(') {
+ parser->paren_count++;
+ } else if (ret == ')') {
+ parser->paren_count--;
+ if (parser->paren_count == 0)
+ parser->newline_as_space = 0;
+ } else if (ret == NEWLINE) {
+ ret = SPACE;
+ } else if (ret != SPACE) {
+ if (parser->paren_count == 0)
+ parser->newline_as_space = 0;
+ }
+ }
+ else if (parser->in_control_line)
+ {
+ if (ret == NEWLINE)
+ parser->in_control_line = 0;
+ }
+ else if (ret == HASH_DEFINE_OBJ || ret == HASH_DEFINE_FUNC ||
+ ret == HASH_UNDEF || ret == HASH_IF ||
+ ret == HASH_IFDEF || ret == HASH_IFNDEF ||
+ ret == HASH_ELIF || ret == HASH_ELSE ||
+ ret == HASH_ENDIF || ret == HASH)
+ {
+ parser->in_control_line = 1;
+ }
+ else if (ret == IDENTIFIER)
+ {
+ macro_t *macro;
+ macro = hash_table_find (parser->defines,
+ yylval->str);
+ if (macro && macro->is_function) {
+ parser->newline_as_space = 1;
+ parser->paren_count = 0;
+ }
+ }
+
+ return ret;
+ }
+
+ node = parser->lex_from_node;
+
+ if (node == NULL) {
+ ralloc_free (parser->lex_from_list);
+ parser->lex_from_list = NULL;
+ return NEWLINE;
+ }
+
+ *yylval = node->token->value;
+ ret = node->token->type;
+
+ parser->lex_from_node = node->next;
+
+ return ret;
+}
+
+static void
+glcpp_parser_lex_from (glcpp_parser_t *parser, token_list_t *list)
+{
+ token_node_t *node;
+
+ assert (parser->lex_from_list == NULL);
+
+ /* Copy list, eliminating any space tokens. */
+ parser->lex_from_list = _token_list_create (parser);
+
+ for (node = list->head; node; node = node->next) {
+ if (node->token->type == SPACE)
+ continue;
+ _token_list_append (parser->lex_from_list, node->token);
+ }
+
+ ralloc_free (list);
+
+ parser->lex_from_node = parser->lex_from_list->head;
+
+ /* It's possible the list consisted of nothing but whitespace. */
+ if (parser->lex_from_node == NULL) {
+ ralloc_free (parser->lex_from_list);
+ parser->lex_from_list = NULL;
+ }
+}
+
+static void
+_glcpp_parser_skip_stack_push_if (glcpp_parser_t *parser, YYLTYPE *loc,
+ int condition)
+{
+ skip_type_t current = SKIP_NO_SKIP;
+ skip_node_t *node;
+
+ if (parser->skip_stack)
+ current = parser->skip_stack->type;
+
+ node = ralloc (parser, skip_node_t);
+ node->loc = *loc;
+
+ if (current == SKIP_NO_SKIP) {
+ if (condition)
+ node->type = SKIP_NO_SKIP;
+ else
+ node->type = SKIP_TO_ELSE;
+ } else {
+ node->type = SKIP_TO_ENDIF;
+ }
+
+ node->next = parser->skip_stack;
+ parser->skip_stack = node;
+}
+
+static void
+_glcpp_parser_skip_stack_change_if (glcpp_parser_t *parser, YYLTYPE *loc,
+ const char *type, int condition)
+{
+ if (parser->skip_stack == NULL) {
+ glcpp_error (loc, parser, "%s without #if\n", type);
+ return;
+ }
+
+ if (parser->skip_stack->type == SKIP_TO_ELSE) {
+ if (condition)
+ parser->skip_stack->type = SKIP_NO_SKIP;
+ } else {
+ parser->skip_stack->type = SKIP_TO_ENDIF;
+ }
+}
+
+static void
+_glcpp_parser_skip_stack_pop (glcpp_parser_t *parser, YYLTYPE *loc)
+{
+ skip_node_t *node;
+
+ if (parser->skip_stack == NULL) {
+ glcpp_error (loc, parser, "#endif without #if\n");
+ return;
+ }
+
+ node = parser->skip_stack;
+ parser->skip_stack = node->next;
+ ralloc_free (node);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 12:05:04 +0000