diff options
Diffstat (limited to 'src/glsl/pp/sl_pp_process.c')
| -rw-r--r-- | src/glsl/pp/sl_pp_process.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_process.c b/src/glsl/pp/sl_pp_process.c new file mode 100644 index 00000000000..56b8fab52a0 --- /dev/null +++ b/src/glsl/pp/sl_pp_process.c @@ -0,0 +1,157 @@ +/************************************************************************** + * + * 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_process.h" + + +enum process_state { + state_seek_hash, + state_seek_directive, + state_seek_newline, + state_expand +}; + +int +sl_pp_process(const struct sl_pp_token_info *input, + struct sl_pp_token_info **output) +{ + unsigned int i = 0; + enum process_state state = state_seek_hash; + struct sl_pp_token_info *out = NULL; + unsigned int out_len = 0; + unsigned int out_max = 0; + + for (;;) { + struct sl_pp_token_info info; + int info_valid = 0; + + switch (input[i].token) { + case SL_PP_WHITESPACE: + /* Drop whitespace alltogether at this point. */ + i++; + break; + + case SL_PP_NEWLINE: + case SL_PP_EOF: + /* Preserve newline just for the sake of line numbering. */ + info = input[i]; + info_valid = 1; + i++; + /* Restart directive parsing. */ + state = state_seek_hash; + break; + + case SL_PP_HASH: + if (state == state_seek_hash) { + i++; + state = state_seek_directive; + } else { + /* Error: unexpected token. */ + return -1; + } + break; + + case SL_PP_IDENTIFIER: + if (state == state_seek_hash) { + info = input[i]; + info_valid = 1; + i++; + state = state_expand; + } else if (state == state_seek_directive) { + i++; + state = state_seek_newline; + } else if (state == state_expand) { + info = input[i]; + info_valid = 1; + i++; + } else { + i++; + } + break; + + default: + if (state == state_seek_hash) { + info = input[i]; + info_valid = 1; + i++; + state = state_expand; + } else if (state == state_seek_directive) { + /* Error: expected directive name. */ + return -1; + } else if (state == state_expand) { + info = input[i]; + info_valid = 1; + i++; + } else { + i++; + } + } + + if (info_valid) { + if (out_len >= out_max) { + unsigned int new_max = out_max; + + if (new_max < 0x100) { + new_max = 0x100; + } else if (new_max < 0x10000) { + new_max *= 2; + } else { + new_max += 0x10000; + } + + out = realloc(out, new_max * sizeof(struct sl_pp_token_info)); + if (!out) { + return -1; + } + out_max = new_max; + } + + if (info.token == SL_PP_IDENTIFIER) { + info.data.identifier = strdup(info.data.identifier); + if (!info.data.identifier) { + return -1; + } + } else if (info.token == SL_PP_NUMBER) { + info.data.number = strdup(info.data.number); + if (!info.data.number) { + return -1; + } + } + + out[out_len++] = info; + + if (info.token == SL_PP_EOF) { + break; + } + } + } + + *output = out; + return 0; +} |