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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 <stdlib.h>
#include <string.h>
#include "sl_pp_public.h"
#include "sl_pp_context.h"
#include "sl_pp_token.h"
int
sl_pp_version(struct sl_pp_context *context,
unsigned int *version)
{
struct sl_pp_token_peek peek;
unsigned int line = context->line;
/* Default values if `#version' is not present. */
*version = 110;
if (sl_pp_token_peek_init(&peek, &context->tokens)) {
return -1;
}
/* There can be multiple `#version' directives present.
* Accept the value of the last one.
*/
for (;;) {
struct sl_pp_token_info input;
int found_hash = 0;
int found_version = 0;
int found_number = 0;
int found_end = 0;
/* Skip whitespace and newlines and seek for hash. */
while (!found_hash) {
if (sl_pp_token_peek_get(&peek, &input)) {
sl_pp_token_peek_destroy(&peek);
return -1;
}
switch (input.token) {
case SL_PP_NEWLINE:
line++;
break;
case SL_PP_WHITESPACE:
break;
case SL_PP_HASH:
found_hash = 1;
break;
default:
sl_pp_token_peek_destroy(&peek);
return 0;
}
}
/* Skip whitespace and seek for `version'. */
while (!found_version) {
if (sl_pp_token_peek_get(&peek, &input)) {
sl_pp_token_peek_destroy(&peek);
return -1;
}
switch (input.token) {
case SL_PP_WHITESPACE:
break;
case SL_PP_IDENTIFIER:
if (input.data.identifier != context->dict.version) {
sl_pp_token_peek_destroy(&peek);
return 0;
}
found_version = 1;
break;
default:
sl_pp_token_peek_destroy(&peek);
return 0;
}
}
sl_pp_token_peek_commit(&peek);
/* Skip whitespace and seek for version number. */
while (!found_number) {
if (sl_pp_token_buffer_get(&context->tokens, &input)) {
sl_pp_token_peek_destroy(&peek);
return -1;
}
switch (input.token) {
case SL_PP_WHITESPACE:
break;
case SL_PP_UINT:
*version = atoi(sl_pp_context_cstr(context, input.data._uint));
found_number = 1;
break;
default:
strcpy(context->error_msg, "expected version number after `#version'");
sl_pp_token_peek_destroy(&peek);
return -1;
}
}
/* Skip whitespace and seek for either newline or eof. */
while (!found_end) {
if (sl_pp_token_buffer_get(&context->tokens, &input)) {
sl_pp_token_peek_destroy(&peek);
return -1;
}
switch (input.token) {
case SL_PP_WHITESPACE:
break;
case SL_PP_NEWLINE:
line++;
/* pass thru */
case SL_PP_EOF:
context->line = line;
found_end = 1;
break;
default:
strcpy(context->error_msg, "expected end of line after version number");
sl_pp_token_peek_destroy(&peek);
return -1;
}
}
}
/* Should not get here. */
}
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