diff options
| -rw-r--r-- | src/glsl/pp/SConscript | 1 | ||||
| -rw-r--r-- | src/glsl/pp/sl_pp_version.c | 150 | ||||
| -rw-r--r-- | src/glsl/pp/sl_pp_version.h | 39 |
3 files changed, 190 insertions, 0 deletions
diff --git a/src/glsl/pp/SConscript b/src/glsl/pp/SConscript index a08f5cf6321..0bc519759d0 100644 --- a/src/glsl/pp/SConscript +++ b/src/glsl/pp/SConscript @@ -10,6 +10,7 @@ glsl = env.StaticLibrary( source = [ 'sl_pp_purify.c', 'sl_pp_token.c', + 'sl_pp_version.c', ], ) Export('glsl') diff --git a/src/glsl/pp/sl_pp_version.c b/src/glsl/pp/sl_pp_version.c new file mode 100644 index 00000000000..f4b4b829d1e --- /dev/null +++ b/src/glsl/pp/sl_pp_version.c @@ -0,0 +1,150 @@ +/************************************************************************** + * + * 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 "sl_pp_version.h" + + +static int +_parse_integer(const char *input, + unsigned int *number) +{ + unsigned int n = 0; + + while (*input >= '0' && *input <= '9') { + if (n * 10 < n) { + /* Overflow. */ + return -1; + } + + n = n * 10 + (*input++ - '0'); + } + + if (*input != '\0') { + /* Invalid decimal number. */ + return -1; + } + + *number = n; + return 0; +} + + +int +sl_pp_version(const struct sl_pp_token_info *input, + unsigned int *version, + unsigned int *tokens_eaten) +{ + unsigned int i = 0; + int found_hash = 0; + int found_version = 0; + int found_number = 0; + + /* Default values if `#version' is not present. */ + *version = 110; + *tokens_eaten = 0; + + /* Skip whitespace and newlines and seek for hash. */ + while (!found_hash) { + switch (input[i].token) { + case SL_PP_WHITESPACE: + case SL_PP_NEWLINE: + i++; + break; + + case SL_PP_HASH: + i++; + found_hash = 1; + break; + + default: + return 0; + } + } + + /* Skip whitespace and seek for `version'. */ + while (!found_version) { + switch (input[i].token) { + case SL_PP_WHITESPACE: + i++; + break; + + case SL_PP_IDENTIFIER: + if (strcmp(input[i].data.identifier, "version")) { + return 0; + } + i++; + found_version = 1; + break; + + default: + return 0; + } + } + + /* Skip whitespace and seek for version number. */ + while (!found_number) { + switch (input[i].token) { + case SL_PP_WHITESPACE: + i++; + break; + + case SL_PP_NUMBER: + if (_parse_integer(input[i].data.number, version)) { + /* Expected version number. */ + return -1; + } + i++; + found_number = 1; + break; + + default: + /* Expected version number. */ + return -1; + } + } + + /* Skip whitespace and seek for either newline or eof. */ + for (;;) { + switch (input[i].token) { + case SL_PP_WHITESPACE: + i++; + break; + + case SL_PP_NEWLINE: + case SL_PP_EOF: + i++; + *tokens_eaten = i; + return 0; + + default: + /* Expected end of line. */ + return -1; + } + } + + /* Should not get here. */ +} diff --git a/src/glsl/pp/sl_pp_version.h b/src/glsl/pp/sl_pp_version.h new file mode 100644 index 00000000000..7deee1a1349 --- /dev/null +++ b/src/glsl/pp/sl_pp_version.h @@ -0,0 +1,39 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + +#ifndef SL_PP_VERSION_H +#define SL_PP_VERSION_H + +#include "sl_pp_token.h" + + +int +sl_pp_version(const struct sl_pp_token_info *input, + unsigned int *version, + unsigned int *tokens_eaten); + +#endif /* SL_PP_VERSION_H */ |