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%{
/*
* 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 const char *
_string_list_has_duplicate (string_list_t *list);
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);
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);
typedef enum {
EXPANSION_MODE_IGNORE_DEFINED,
EXPANSION_MODE_EVALUATE_DEFINED
} expansion_mode_t;
/* Expand list, and begin lexing from the result (after first
* prefixing a token of type 'head_token_type').
*/
static void
_glcpp_parser_expand_and_lex_from (glcpp_parser_t *parser,
int head_token_type,
token_list_t *list,
expansion_mode_t mode);
/* Perform macro expansion in-place on the given list. */
static void
_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
token_list_t *list,
expansion_mode_t mode);
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);
static void
_glcpp_parser_handle_version_declaration(glcpp_parser_t *parser, intmax_t version,
const char *ident, bool explicitly_set);
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
/* We use HASH_TOKEN, DEFINE_TOKEN and VERSION_TOKEN (as opposed to
* HASH, DEFINE, and VERSION) to avoid conflicts with other symbols,
* (such as the <HASH> and <DEFINE> start conditions in the lexer). */
%token DEFINED ELIF_EXPANDED HASH_TOKEN DEFINE_TOKEN FUNC_IDENTIFIER OBJ_IDENTIFIER ELIF ELSE ENDIF ERROR_TOKEN IF IFDEF IFNDEF LINE PRAGMA UNDEF VERSION_TOKEN GARBAGE IDENTIFIER IF_EXPANDED INTEGER INTEGER_STRING LINE_EXPANDED NEWLINE OTHER PLACEHOLDER SPACE PLUS_PLUS MINUS_MINUS
%token PASTE
%type <ival> INTEGER operator SPACE integer_constant
%type <expression_value> expression
%type <str> IDENTIFIER FUNC_IDENTIFIER OBJ_IDENTIFIER INTEGER_STRING OTHER ERROR_TOKEN PRAGMA
%type <string_list> identifier_list
%type <token> preprocessing_token
%type <token_list> pp_tokens replacement_list text_line
%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
%debug
%%
input:
/* empty */
| input line
;
line:
control_line
| SPACE control_line
| text_line {
_glcpp_parser_print_expanded_token_list (parser, $1);
ralloc_asprintf_rewrite_tail (&parser->output, &parser->output_length, "\n");
ralloc_free ($1);
}
| expanded_line
;
expanded_line:
IF_EXPANDED expression NEWLINE {
if (parser->is_gles && $2.undefined_macro)
glcpp_error(& @1, parser, "undefined macro %s in expression (illegal in GLES)", $2.undefined_macro);
_glcpp_parser_skip_stack_push_if (parser, & @1, $2.value);
}
| ELIF_EXPANDED expression NEWLINE {
if (parser->is_gles && $2.undefined_macro)
glcpp_error(& @1, parser, "undefined macro %s in expression (illegal in GLES)", $2.undefined_macro);
_glcpp_parser_skip_stack_change_if (parser, & @1, "elif", $2.value);
}
| LINE_EXPANDED integer_constant NEWLINE {
parser->has_new_line_number = 1;
parser->new_line_number = $2;
ralloc_asprintf_rewrite_tail (&parser->output,
&parser->output_length,
"#line %" PRIiMAX "\n",
$2);
}
| LINE_EXPANDED integer_constant integer_constant NEWLINE {
parser->has_new_line_number = 1;
parser->new_line_number = $2;
parser->has_new_source_number = 1;
parser->new_source_number = $3;
ralloc_asprintf_rewrite_tail (&parser->output,
&parser->output_length,
"#line %" PRIiMAX " %" PRIiMAX "\n",
$2, $3);
}
;
define:
OBJ_IDENTIFIER replacement_list NEWLINE {
_define_object_macro (parser, & @1, $1, $2);
}
| FUNC_IDENTIFIER '(' ')' replacement_list NEWLINE {
_define_function_macro (parser, & @1, $1, NULL, $4);
}
| FUNC_IDENTIFIER '(' identifier_list ')' replacement_list NEWLINE {
_define_function_macro (parser, & @1, $1, $3, $5);
}
;
control_line:
control_line_success {
ralloc_asprintf_rewrite_tail (&parser->output, &parser->output_length, "\n");
}
| control_line_error
| HASH_TOKEN LINE {
glcpp_parser_resolve_implicit_version(parser);
} pp_tokens NEWLINE {
if (parser->skip_stack == NULL ||
parser->skip_stack->type == SKIP_NO_SKIP)
{
_glcpp_parser_expand_and_lex_from (parser,
LINE_EXPANDED, $4,
EXPANSION_MODE_IGNORE_DEFINED);
}
}
;
control_line_success:
HASH_TOKEN DEFINE_TOKEN {
glcpp_parser_resolve_implicit_version(parser);
} define
| HASH_TOKEN UNDEF {
glcpp_parser_resolve_implicit_version(parser);
} IDENTIFIER NEWLINE {
macro_t *macro;
if (strcmp("__LINE__", $4) == 0
|| strcmp("__FILE__", $4) == 0
|| strcmp("__VERSION__", $4) == 0)
glcpp_error(& @1, parser, "Built-in (pre-defined)"
" macro names can not be undefined.");
macro = hash_table_find (parser->defines, $4);
if (macro) {
hash_table_remove (parser->defines, $4);
ralloc_free (macro);
}
ralloc_free ($4);
}
| HASH_TOKEN IF {
glcpp_parser_resolve_implicit_version(parser);
} pp_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_and_lex_from (parser,
IF_EXPANDED, $4,
EXPANSION_MODE_EVALUATE_DEFINED);
}
else
{
_glcpp_parser_skip_stack_push_if (parser, & @1, 0);
parser->skip_stack->type = SKIP_TO_ENDIF;
}
}
| HASH_TOKEN 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_TOKEN IFDEF {
glcpp_parser_resolve_implicit_version(parser);
} IDENTIFIER junk NEWLINE {
macro_t *macro = hash_table_find (parser->defines, $4);
ralloc_free ($4);
_glcpp_parser_skip_stack_push_if (parser, & @1, macro != NULL);
}
| HASH_TOKEN IFNDEF {
glcpp_parser_resolve_implicit_version(parser);
} IDENTIFIER junk NEWLINE {
macro_t *macro = hash_table_find (parser->defines, $4);
ralloc_free ($4);
_glcpp_parser_skip_stack_push_if (parser, & @3, macro == NULL);
}
| HASH_TOKEN ELIF pp_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_and_lex_from (parser,
ELIF_EXPANDED, $3,
EXPANSION_MODE_EVALUATE_DEFINED);
}
else if (parser->skip_stack &&
parser->skip_stack->has_else)
{
glcpp_error(& @1, parser, "#elif after #else");
}
else
{
_glcpp_parser_skip_stack_change_if (parser, & @1,
"elif", 0);
}
}
| HASH_TOKEN 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 if (parser->skip_stack &&
parser->skip_stack->has_else)
{
glcpp_error(& @1, parser, "#elif after #else");
}
else
{
_glcpp_parser_skip_stack_change_if (parser, & @1,
"elif", 0);
glcpp_warning(& @1, parser, "ignoring illegal #elif without expression");
}
}
| HASH_TOKEN ELSE { parser->lexing_directive = 1; } NEWLINE {
if (parser->skip_stack &&
parser->skip_stack->has_else)
{
glcpp_error(& @1, parser, "multiple #else");
}
else
{
_glcpp_parser_skip_stack_change_if (parser, & @1, "else", 1);
if (parser->skip_stack)
parser->skip_stack->has_else = true;
}
}
| HASH_TOKEN ENDIF {
_glcpp_parser_skip_stack_pop (parser, & @1);
} NEWLINE
| HASH_TOKEN VERSION_TOKEN integer_constant NEWLINE {
if (parser->version_resolved) {
glcpp_error(& @1, parser, "#version must appear on the first line");
}
_glcpp_parser_handle_version_declaration(parser, $3, NULL, true);
}
| HASH_TOKEN VERSION_TOKEN integer_constant IDENTIFIER NEWLINE {
if (parser->version_resolved) {
glcpp_error(& @1, parser, "#version must appear on the first line");
}
_glcpp_parser_handle_version_declaration(parser, $3, $4, true);
}
| HASH_TOKEN NEWLINE {
glcpp_parser_resolve_implicit_version(parser);
}
| HASH_TOKEN PRAGMA NEWLINE {
ralloc_asprintf_rewrite_tail (&parser->output, &parser->output_length, "#%s", $2);
}
;
control_line_error:
HASH_TOKEN ERROR_TOKEN NEWLINE {
glcpp_error(& @1, parser, "#%s", $2);
}
| HASH_TOKEN DEFINE_TOKEN NEWLINE {
glcpp_error (& @1, parser, "#define without macro name");
}
| HASH_TOKEN GARBAGE pp_tokens NEWLINE {
glcpp_error (& @1, parser, "Illegal non-directive after #");
}
;
integer_constant:
INTEGER_STRING {
if (strlen ($1) >= 3 && strncmp ($1, "0x", 2) == 0) {
$$ = (int)strtoll ($1 + 2, NULL, 16);
} else if ($1[0] == '0') {
$$ = (int)strtoll ($1, NULL, 8);
} else {
$$ = (int)strtoll ($1, NULL, 10);
}
}
| INTEGER {
$$ = $1;
}
expression:
integer_constant {
$$.value = $1;
$$.undefined_macro = NULL;
}
| IDENTIFIER {
$$.value = 0;
if (parser->is_gles)
$$.undefined_macro = ralloc_strdup (parser, $1);
else
$$.undefined_macro = NULL;
}
| expression OR expression {
$$.value = $1.value || $3.value;
/* Short-circuit: Only flag undefined from right side
* if left side evaluates to false.
*/
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else if (! $1.value)
$$.undefined_macro = $3.undefined_macro;
}
| expression AND expression {
$$.value = $1.value && $3.value;
/* Short-circuit: Only flag undefined from right-side
* if left side evaluates to true.
*/
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else if ($1.value)
$$.undefined_macro = $3.undefined_macro;
}
| expression '|' expression {
$$.value = $1.value | $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '^' expression {
$$.value = $1.value ^ $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '&' expression {
$$.value = $1.value & $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression NOT_EQUAL expression {
$$.value = $1.value != $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression EQUAL expression {
$$.value = $1.value == $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression GREATER_OR_EQUAL expression {
$$.value = $1.value >= $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression LESS_OR_EQUAL expression {
$$.value = $1.value <= $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '>' expression {
$$.value = $1.value > $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '<' expression {
$$.value = $1.value < $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression RIGHT_SHIFT expression {
$$.value = $1.value >> $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression LEFT_SHIFT expression {
$$.value = $1.value << $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '-' expression {
$$.value = $1.value - $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '+' expression {
$$.value = $1.value + $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '%' expression {
if ($3.value == 0) {
yyerror (& @1, parser,
"zero modulus in preprocessor directive");
} else {
$$.value = $1.value % $3.value;
}
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '/' expression {
if ($3.value == 0) {
yyerror (& @1, parser,
"division by 0 in preprocessor directive");
} else {
$$.value = $1.value / $3.value;
}
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| expression '*' expression {
$$.value = $1.value * $3.value;
if ($1.undefined_macro)
$$.undefined_macro = $1.undefined_macro;
else
$$.undefined_macro = $3.undefined_macro;
}
| '!' expression %prec UNARY {
$$.value = ! $2.value;
$$.undefined_macro = $2.undefined_macro;
}
| '~' expression %prec UNARY {
$$.value = ~ $2.value;
$$.undefined_macro = $2.undefined_macro;
}
| '-' expression %prec UNARY {
$$.value = - $2.value;
$$.undefined_macro = $2.undefined_macro;
}
| '+' expression %prec UNARY {
$$.value = + $2.value;
$$.undefined_macro = $2.undefined_macro;
}
| '(' expression ')' {
$$ = $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 { $$ = NULL; }
| pp_tokens NEWLINE
;
replacement_list:
/* empty */ { $$ = NULL; }
| pp_tokens
;
junk:
/* empty */
| pp_tokens {
glcpp_error(&@1, parser, "extra tokens at end of directive");
}
;
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;
}
| DEFINED {
$$ = _token_create_ival (parser, DEFINED, DEFINED);
$$->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 { $$ = PASTE; }
| PLUS_PLUS { $$ = PLUS_PLUS; }
| MINUS_MINUS { $$ = MINUS_MINUS; }
;
%%
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;
}
/* Return duplicate string in list (if any), NULL otherwise. */
const char *
_string_list_has_duplicate (string_list_t *list)
{
string_node_t *node, *dup;
if (list == NULL)
return NULL;
for (node = list->head; node; node = node->next) {
for (dup = node->next; dup; dup = dup->next) {
if (strcmp (node->str, dup->str) == 0)
return node->str;
}
}
return NULL;
}
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;
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;
/* Make sure whitespace appears in the same places in both.
* It need not be exactly the same amount of whitespace,
* though.
*/
if (node_a->token->type == SPACE
&& node_b->token->type == SPACE) {
while (node_a->token->type == SPACE)
node_a = node_a->next;
while (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, size_t *len, token_t *token)
{
if (token->type < 256) {
ralloc_asprintf_rewrite_tail (out, len, "%c", token->type);
return;
}
switch (token->type) {
case INTEGER:
ralloc_asprintf_rewrite_tail (out, len, "%" PRIiMAX, token->value.ival);
break;
case IDENTIFIER:
case INTEGER_STRING:
case OTHER:
ralloc_asprintf_rewrite_tail (out, len, "%s", token->value.str);
break;
case SPACE:
ralloc_asprintf_rewrite_tail (out, len, " ");
break;
case LEFT_SHIFT:
ralloc_asprintf_rewrite_tail (out, len, "<<");
break;
case RIGHT_SHIFT:
ralloc_asprintf_rewrite_tail (out, len, ">>");
break;
case LESS_OR_EQUAL:
ralloc_asprintf_rewrite_tail (out, len, "<=");
break;
case GREATER_OR_EQUAL:
ralloc_asprintf_rewrite_tail (out, len, ">=");
break;
case EQUAL:
ralloc_asprintf_rewrite_tail (out, len, "==");
break;
case NOT_EQUAL:
ralloc_asprintf_rewrite_tail (out, len, "!=");
break;
case AND:
ralloc_asprintf_rewrite_tail (out, len, "&&");
break;
case OR:
ralloc_asprintf_rewrite_tail (out, len, "||");
break;
case PASTE:
ralloc_asprintf_rewrite_tail (out, len, "##");
break;
case PLUS_PLUS:
ralloc_asprintf_rewrite_tail (out, len, "++");
break;
case MINUS_MINUS:
ralloc_asprintf_rewrite_tail (out, len, "--");
break;
case DEFINED:
ralloc_asprintf_rewrite_tail (out, len, "defined");
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 (or integer) tokens can usually just be
* mashed together. (We also handle a string followed by an
* integer here as well.)
*
* There are some exceptions here. Notably, if the first token
* is an integer (or a string representing an integer), then
* the second token must also be an integer or must be a
* string representing an integer that begins with a digit.
*/
if ((token->type == IDENTIFIER || token->type == OTHER || token->type == INTEGER_STRING || token->type == INTEGER) &&
(other->type == IDENTIFIER || other->type == OTHER || other->type == INTEGER_STRING || other->type == INTEGER))
{
char *str;
int combined_type;
/* Check that pasting onto an integer doesn't create a
* non-integer, (that is, only digits can be
* pasted. */
if (token->type == INTEGER_STRING || token->type == INTEGER)
{
switch (other->type) {
case INTEGER_STRING:
if (other->value.str[0] < '0' ||
other->value.str[0] > '9')
goto FAIL;
break;
case INTEGER:
if (other->value.ival < 0)
goto FAIL;
break;
default:
goto FAIL;
}
}
if (token->type == INTEGER)
str = ralloc_asprintf (token, "%" PRIiMAX,
token->value.ival);
else
str = ralloc_strdup (token, token->value.str);
if (other->type == INTEGER)
ralloc_asprintf_append (&str, "%" PRIiMAX,
other->value.ival);
else
ralloc_strcat (&str, other->value.str);
/* New token is same type as original token, unless we
* started with an integer, in which case we will be
* creating an integer-string. */
combined_type = token->type;
if (combined_type == INTEGER)
combined_type = INTEGER_STRING;
combined = _token_create_str (token, combined_type, str);
combined->location = token->location;
return combined;
}
FAIL:
glcpp_error (&token->location, parser, "");
ralloc_asprintf_rewrite_tail (&parser->info_log, &parser->info_log_length, "Pasting \"");
_token_print (&parser->info_log, &parser->info_log_length, token);
ralloc_asprintf_rewrite_tail (&parser->info_log, &parser->info_log_length, "\" and \"");
_token_print (&parser->info_log, &parser->info_log_length, other);
ralloc_asprintf_rewrite_tail (&parser->info_log, &parser->info_log_length, "\" 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, &parser->output_length, 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, gl_api api)
{
glcpp_parser_t *parser;
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_directive = 0;
parser->space_tokens = 1;
parser->last_token_was_newline = 0;
parser->last_token_was_space = 0;
parser->first_non_space_token_this_line = 1;
parser->newline_as_space = 0;
parser->in_control_line = 0;
parser->paren_count = 0;
parser->commented_newlines = 0;
parser->skip_stack = NULL;
parser->skipping = 0;
parser->lex_from_list = NULL;
parser->lex_from_node = NULL;
parser->output = ralloc_strdup(parser, "");
parser->output_length = 0;
parser->info_log = ralloc_strdup(parser, "");
parser->info_log_length = 0;
parser->error = 0;
parser->extensions = extensions;
parser->api = api;
parser->version_resolved = false;
parser->has_new_line_number = 0;
parser->new_line_number = 1;
parser->has_new_source_number = 0;
parser->new_source_number = 0;
return 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 argument. */
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_ival (void *ctx, int type, int ival)
{
token_list_t *list;
token_t *node;
list = _token_list_create (ctx);
node = _token_create_ival (list, type, ival);
_token_list_append (list, node);
return list;
}
static token_list_t *
_token_list_create_with_one_space (void *ctx)
{
return _token_list_create_with_one_ival (ctx, SPACE, SPACE);
}
static token_list_t *
_token_list_create_with_one_integer (void *ctx, int ival)
{
return _token_list_create_with_one_ival (ctx, INTEGER, ival);
}
/* Evaluate a DEFINED token node (based on subsequent tokens in the list).
*
* Note: This function must only be called when "node" is a DEFINED token,
* (and will abort with an assertion failure otherwise).
*
* If "node" is followed, (ignoring any SPACE tokens), by an IDENTIFIER token
* (optionally preceded and followed by '(' and ')' tokens) then the following
* occurs:
*
* If the identifier is a defined macro, this function returns 1.
*
* If the identifier is not a defined macro, this function returns 0.
*
* In either case, *last will be updated to the last node in the list
* consumed by the evaluation, (either the token of the identifier or the
* token of the closing parenthesis).
*
* In all other cases, (such as "node is the final node of the list", or
* "missing closing parenthesis", etc.), this function generates a
* preprocessor error, returns -1 and *last will not be set.
*/
static int
_glcpp_parser_evaluate_defined (glcpp_parser_t *parser,
token_node_t *node,
token_node_t **last)
{
token_node_t *argument, *defined = node;
assert (node->token->type == DEFINED);
node = node->next;
/* Ignore whitespace after DEFINED token. */
while (node && node->token->type == SPACE)
node = node->next;
if (node == NULL)
goto FAIL;
if (node->token->type == IDENTIFIER || node->token->type == OTHER) {
argument = node;
} else if (node->token->type == '(') {
node = node->next;
/* Ignore whitespace after '(' token. */
while (node && node->token->type == SPACE)
node = node->next;
if (node == NULL || (node->token->type != IDENTIFIER &&
node->token->type != OTHER))
{
goto FAIL;
}
argument = node;
node = node->next;
/* Ignore whitespace after identifier, before ')' token. */
while (node && node->token->type == SPACE)
node = node->next;
if (node == NULL || node->token->type != ')')
goto FAIL;
} else {
goto FAIL;
}
*last = node;
return hash_table_find (parser->defines,
argument->token->value.str) ? 1 : 0;
FAIL:
glcpp_error (&defined->token->location, parser,
"\"defined\" not followed by an identifier");
return -1;
}
/* Evaluate all DEFINED nodes in a given list, modifying the list in place.
*/
static void
_glcpp_parser_evaluate_defined_in_list (glcpp_parser_t *parser,
token_list_t *list)
{
token_node_t *node, *node_prev, *replacement, *last = NULL;
int value;
if (list == NULL)
return;
node_prev = NULL;
node = list->head;
while (node) {
if (node->token->type != DEFINED)
goto NEXT;
value = _glcpp_parser_evaluate_defined (parser, node, &last);
if (value == -1)
goto NEXT;
replacement = ralloc (list, token_node_t);
replacement->token = _token_create_ival (list, INTEGER, value);
/* Splice replacement node into list, replacing from "node"
* through "last". */
if (node_prev)
node_prev->next = replacement;
else
list->head = replacement;
replacement->next = last->next;
if (last == list->tail)
list->tail = replacement;
node = replacement;
NEXT:
node_prev = node;
node = node->next;
}
}
/* Perform macro expansion on 'list', placing the resulting tokens
* into a new list which is initialized with a first token of type
* 'head_token_type'. Then begin lexing from the resulting list,
* (return to the current lexing source when this list is exhausted).
*
* See the documentation of _glcpp_parser_expand_token_list for a description
* of the "mode" parameter.
*/
static void
_glcpp_parser_expand_and_lex_from (glcpp_parser_t *parser,
int head_token_type,
token_list_t *list,
expansion_mode_t mode)
{
token_list_t *expanded;
token_t *token;
expanded = _token_list_create (parser);
token = _token_create_ival (parser, head_token_type, head_token_type);
_token_list_append (expanded, token);
_glcpp_parser_expand_token_list (parser, list, mode);
_token_list_append_list (expanded, list);
glcpp_parser_lex_from (parser, expanded);
}
static void
_glcpp_parser_apply_pastes (glcpp_parser_t *parser, token_list_t *list)
{
token_node_t *node;
node = list->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;
}
node->token = _token_paste (parser, node->token, next_non_space->token);
node->next = next_non_space->next;
if (next_non_space == list->tail)
list->tail = node;
}
list->non_space_tail = list->tail;
}
/* 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.
*
* See the documentation of _glcpp_parser_expand_token_list for a description
* of the "mode" parameter.
*/
static token_list_t *
_glcpp_parser_expand_function (glcpp_parser_t *parser,
token_node_t *node,
token_node_t **last,
expansion_mode_t mode)
{
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,
mode);
_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);
_glcpp_parser_apply_pastes (parser, substituted);
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.
*
* See the documentation of _glcpp_parser_expand_token_list for a description
* of the "mode" parameter.
*/
static token_list_t *
_glcpp_parser_expand_node (glcpp_parser_t *parser,
token_node_t *node,
token_node_t **last,
expansion_mode_t mode)
{
token_t *token = node->token;
const char *identifier;
macro_t *macro;
/* We only expand identifiers */
if (token->type != IDENTIFIER) {
return NULL;
}
*last = node;
identifier = token->value.str;
/* Special handling for __LINE__ and __FILE__, (not through
* the hash table). */
if (strcmp(identifier, "__LINE__") == 0)
return _token_list_create_with_one_integer (parser, node->token->location.first_line);
if (strcmp(identifier, "__FILE__") == 0)
return _token_list_create_with_one_integer (parser, node->token->location.source);
/* Look up this identifier in the hash table. */
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);
return expansion;
}
if (! macro->is_function)
{
token_list_t *replacement;
/* Replace a macro defined as empty with a SPACE token. */
if (macro->replacements == NULL)
return _token_list_create_with_one_space (parser);
replacement = _token_list_copy (parser, macro->replacements);
_glcpp_parser_apply_pastes (parser, replacement);
return replacement;
}
return _glcpp_parser_expand_function (parser, node, last, mode);
}
/* 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.
*
* The "mode" argument controls the handling of any DEFINED tokens that
* result from expansion as follows:
*
* EXPANSION_MODE_IGNORE_DEFINED: Any resulting DEFINED tokens will be
* left in the final list, unevaluated. This is the correct mode
* for expanding any list in any context other than a
* preprocessor conditional, (#if or #elif).
*
* EXPANSION_MODE_EVALUATE_DEFINED: Any resulting DEFINED tokens will be
* evaluated to 0 or 1 tokens depending on whether the following
* token is the name of a defined macro. If the DEFINED token is
* not followed by an (optionally parenthesized) identifier, then
* an error will be generated. This the correct mode for
* expanding any list in the context of a preprocessor
* conditional, (#if or #elif).
*/
static void
_glcpp_parser_expand_token_list (glcpp_parser_t *parser,
token_list_t *list,
expansion_mode_t mode)
{
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;
if (mode == EXPANSION_MODE_EVALUATE_DEFINED)
_glcpp_parser_evaluate_defined_in_list (parser, list);
while (node) {
while (parser->active && parser->active->marker == node)
_parser_active_list_pop (parser);
expansion = _glcpp_parser_expand_node (parser, node, &last, mode);
if (expansion) {
token_node_t *n;
if (mode == EXPANSION_MODE_EVALUATE_DEFINED) {
_glcpp_parser_evaluate_defined_in_list (parser,
expansion);
}
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, EXPANSION_MODE_IGNORE_DEFINED);
_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)
{
/* Section 3.3 (Preprocessor) of the GLSL 1.30 spec (and later) and
* the GLSL ES spec (all versions) say:
*
* "All macro names containing two consecutive underscores ( __ )
* are reserved for future use as predefined macro names. All
* macro names prefixed with "GL_" ("GL" followed by a single
* underscore) are also reserved."
*
* The intention is that names containing __ are reserved for internal
* use by the implementation, and names prefixed with GL_ are reserved
* for use by Khronos. Since every extension adds a name prefixed
* with GL_ (i.e., the name of the extension), that should be an
* error. Names simply containing __ are dangerous to use, but should
* be allowed.
*
* A future version of the GLSL specification will clarify this.
*/
if (strstr(identifier, "__")) {
glcpp_warning(loc, parser,
"Macro names containing \"__\" are reserved "
"for use by the implementation.\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;
/* We define pre-defined macros before we've started parsing the
* actual file. So if there's no location defined yet, that's what
* were doing and we don't want to generate an error for using the
* reserved names. */
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;
const char *dup;
_check_for_reserved_macro_name(parser, loc, identifier);
/* Check for any duplicate parameter names. */
if ((dup = _string_list_has_duplicate (parameters)) != NULL) {
glcpp_error (loc, parser, "Duplicate macro parameter \"%s\"",
dup);
}
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 == DEFINE_TOKEN ||
ret == UNDEF || ret == IF ||
ret == IFDEF || ret == IFNDEF ||
ret == ELIF || ret == ELSE ||
ret == ENDIF || ret == HASH_TOKEN)
{
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->has_else = false;
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);
}
static void
_glcpp_parser_handle_version_declaration(glcpp_parser_t *parser, intmax_t version,
const char *es_identifier,
bool explicitly_set)
{
const struct gl_extensions *extensions = parser->extensions;
if (parser->version_resolved)
return;
parser->version_resolved = true;
add_builtin_define (parser, "__VERSION__", version);
parser->is_gles = (version == 100) ||
(es_identifier &&
(strcmp(es_identifier, "es") == 0));
/* Add pre-defined macros. */
if (parser->is_gles) {
add_builtin_define(parser, "GL_ES", 1);
add_builtin_define(parser, "GL_EXT_separate_shader_objects", 1);
if (extensions != NULL) {
if (extensions->OES_EGL_image_external)
add_builtin_define(parser, "GL_OES_EGL_image_external", 1);
if (extensions->OES_standard_derivatives)
add_builtin_define(parser, "GL_OES_standard_derivatives", 1);
}
} else {
add_builtin_define(parser, "GL_ARB_draw_buffers", 1);
add_builtin_define(parser, "GL_ARB_separate_shader_objects", 1);
add_builtin_define(parser, "GL_ARB_texture_rectangle", 1);
add_builtin_define(parser, "GL_AMD_shader_trinary_minmax", 1);
if (extensions != NULL) {
if (extensions->EXT_texture_array)
add_builtin_define(parser, "GL_EXT_texture_array", 1);
if (extensions->ARB_arrays_of_arrays)
add_builtin_define(parser, "GL_ARB_arrays_of_arrays", 1);
if (extensions->ARB_fragment_coord_conventions)
add_builtin_define(parser, "GL_ARB_fragment_coord_conventions",
1);
if (extensions->ARB_fragment_layer_viewport)
add_builtin_define(parser, "GL_ARB_fragment_layer_viewport", 1);
if (extensions->ARB_explicit_attrib_location)
add_builtin_define(parser, "GL_ARB_explicit_attrib_location", 1);
if (extensions->ARB_explicit_uniform_location)
add_builtin_define(parser, "GL_ARB_explicit_uniform_location", 1);
if (extensions->ARB_shader_texture_lod)
add_builtin_define(parser, "GL_ARB_shader_texture_lod", 1);
if (extensions->ARB_draw_instanced)
add_builtin_define(parser, "GL_ARB_draw_instanced", 1);
if (extensions->EXT_draw_instanced)
add_builtin_define(parser, "GL_EXT_draw_instanced", 1);
if (extensions->ARB_conservative_depth) {
add_builtin_define(parser, "GL_AMD_conservative_depth", 1);
add_builtin_define(parser, "GL_ARB_conservative_depth", 1);
}
if (extensions->ARB_shader_bit_encoding)
add_builtin_define(parser, "GL_ARB_shader_bit_encoding", 1);
if (extensions->ARB_uniform_buffer_object)
add_builtin_define(parser, "GL_ARB_uniform_buffer_object", 1);
if (extensions->ARB_texture_cube_map_array)
add_builtin_define(parser, "GL_ARB_texture_cube_map_array", 1);
if (extensions->ARB_shading_language_packing)
add_builtin_define(parser, "GL_ARB_shading_language_packing", 1);
if (extensions->ARB_texture_multisample)
add_builtin_define(parser, "GL_ARB_texture_multisample", 1);
if (extensions->ARB_texture_query_levels)
add_builtin_define(parser, "GL_ARB_texture_query_levels", 1);
if (extensions->ARB_texture_query_lod)
add_builtin_define(parser, "GL_ARB_texture_query_lod", 1);
if (extensions->ARB_gpu_shader5)
add_builtin_define(parser, "GL_ARB_gpu_shader5", 1);
if (extensions->AMD_vertex_shader_layer)
add_builtin_define(parser, "GL_AMD_vertex_shader_layer", 1);
if (extensions->AMD_vertex_shader_viewport_index)
add_builtin_define(parser, "GL_AMD_vertex_shader_viewport_index", 1);
if (extensions->ARB_shading_language_420pack)
add_builtin_define(parser, "GL_ARB_shading_language_420pack", 1);
if (extensions->ARB_sample_shading)
add_builtin_define(parser, "GL_ARB_sample_shading", 1);
if (extensions->ARB_texture_gather)
add_builtin_define(parser, "GL_ARB_texture_gather", 1);
if (extensions->ARB_shader_atomic_counters)
add_builtin_define(parser, "GL_ARB_shader_atomic_counters", 1);
if (extensions->ARB_viewport_array)
add_builtin_define(parser, "GL_ARB_viewport_array", 1);
if (extensions->ARB_compute_shader)
add_builtin_define(parser, "GL_ARB_compute_shader", 1);
if (extensions->ARB_shader_image_load_store)
add_builtin_define(parser, "GL_ARB_shader_image_load_store", 1);
if (extensions->ARB_derivative_control)
add_builtin_define(parser, "GL_ARB_derivative_control", 1);
}
}
if (extensions != NULL) {
if (extensions->EXT_shader_integer_mix)
add_builtin_define(parser, "GL_EXT_shader_integer_mix", 1);
}
if (version >= 150)
add_builtin_define(parser, "GL_core_profile", 1);
/* Currently, all ES2/ES3 implementations support highp in the
* fragment shader, so we always define this macro in ES2/ES3.
* 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 (version >= 130 || parser->is_gles)
add_builtin_define (parser, "GL_FRAGMENT_PRECISION_HIGH", 1);
if (explicitly_set) {
ralloc_asprintf_rewrite_tail (&parser->output, &parser->output_length,
"#version %" PRIiMAX "%s%s", version,
es_identifier ? " " : "",
es_identifier ? es_identifier : "");
}
}
/* GLSL version if no version is explicitly specified. */
#define IMPLICIT_GLSL_VERSION 110
#define IMPLICIT_GLSL_ES_VERSION 100
/* GLSL ES version if no version is explicitly specified. */
#define IMPLICIT_GLSL_ES_VERSION 100
void
glcpp_parser_resolve_implicit_version(glcpp_parser_t *parser)
{
int language_version = parser->api == API_OPENGLES2 ?
IMPLICIT_GLSL_ES_VERSION :
IMPLICIT_GLSL_VERSION;
_glcpp_parser_handle_version_declaration(parser, language_version,
NULL, false);
}
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