| /************************************************************************** |
| * |
| * 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_context.h" |
| #include "sl_pp_process.h" |
| #include "sl_pp_public.h" |
| |
| |
| int |
| sl_pp_context_add_extension(struct sl_pp_context *context, |
| const char *name, |
| const char *name_string) |
| { |
| struct sl_pp_extension ext; |
| |
| if (context->num_extensions == SL_PP_MAX_EXTENSIONS) { |
| return -1; |
| } |
| |
| ext.name = sl_pp_context_add_unique_str(context, name); |
| if (ext.name == -1) { |
| return -1; |
| } |
| |
| ext.name_string = sl_pp_context_add_unique_str(context, name_string); |
| if (ext.name_string == -1) { |
| return -1; |
| } |
| |
| context->extensions[context->num_extensions++] = ext; |
| return 0; |
| } |
| |
| int |
| sl_pp_process_extension(struct sl_pp_context *context, |
| const struct sl_pp_token_info *input, |
| unsigned int first, |
| unsigned int last, |
| struct sl_pp_process_state *state) |
| { |
| int extension_name = -1; |
| int behavior = -1; |
| struct sl_pp_token_info out; |
| |
| /* Grab the extension name. */ |
| if (first < last && input[first].token == SL_PP_IDENTIFIER) { |
| extension_name = input[first].data.identifier; |
| first++; |
| } |
| if (extension_name == -1) { |
| strcpy(context->error_msg, "expected identifier after `#extension'"); |
| return -1; |
| } |
| |
| /* Make sure the extension is supported. */ |
| if (extension_name == context->dict.all) { |
| out.data.extension = extension_name; |
| } else { |
| unsigned int i; |
| |
| out.data.extension = -1; |
| for (i = 0; i < context->num_extensions; i++) { |
| if (extension_name == context->extensions[i].name_string) { |
| out.data.extension = extension_name; |
| break; |
| } |
| } |
| } |
| |
| /* Grab the colon separating the extension name and behavior. */ |
| while (first < last && input[first].token == SL_PP_WHITESPACE) { |
| first++; |
| } |
| if (first < last && input[first].token == SL_PP_COLON) { |
| first++; |
| } else { |
| strcpy(context->error_msg, "expected `:' after extension name"); |
| return -1; |
| } |
| while (first < last && input[first].token == SL_PP_WHITESPACE) { |
| first++; |
| } |
| |
| /* Grab the behavior name. */ |
| if (first < last && input[first].token == SL_PP_IDENTIFIER) { |
| behavior = input[first].data.identifier; |
| first++; |
| } |
| if (behavior == -1) { |
| strcpy(context->error_msg, "expected identifier after `:'"); |
| return -1; |
| } |
| |
| if (behavior == context->dict.require) { |
| if (out.data.extension == -1) { |
| strcpy(context->error_msg, "the required extension is not supported"); |
| return -1; |
| } |
| if (out.data.extension == context->dict.all) { |
| strcpy(context->error_msg, "invalid behavior for `all' extension: `require'"); |
| return -1; |
| } |
| out.token = SL_PP_EXTENSION_REQUIRE; |
| } else if (behavior == context->dict.enable) { |
| if (out.data.extension == -1) { |
| /* Warning: the extension cannot be enabled. */ |
| return 0; |
| } |
| if (out.data.extension == context->dict.all) { |
| strcpy(context->error_msg, "invalid behavior for `all' extension: `enable'"); |
| return -1; |
| } |
| out.token = SL_PP_EXTENSION_ENABLE; |
| } else if (behavior == context->dict.warn) { |
| if (out.data.extension == -1) { |
| /* Warning: the extension is not supported. */ |
| return 0; |
| } |
| out.token = SL_PP_EXTENSION_WARN; |
| } else if (behavior == context->dict.disable) { |
| if (out.data.extension == -1) { |
| /* Warning: the extension is not supported. */ |
| return 0; |
| } |
| out.token = SL_PP_EXTENSION_DISABLE; |
| } else { |
| strcpy(context->error_msg, "unrecognised behavior name"); |
| return -1; |
| } |
| |
| /* Grab the end of line. */ |
| while (first < last && input[first].token == SL_PP_WHITESPACE) { |
| first++; |
| } |
| if (first < last) { |
| strcpy(context->error_msg, "expected end of line after behavior name"); |
| return -1; |
| } |
| |
| if (sl_pp_process_out(state, &out)) { |
| return -1; |
| } |
| |
| return 0; |
| } |