diff options
Diffstat (limited to 'src/glsl/pp/sl_pp_token_util.c')
| -rw-r--r-- | src/glsl/pp/sl_pp_token_util.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_token_util.c b/src/glsl/pp/sl_pp_token_util.c new file mode 100644 index 0000000000..c85263d9a1 --- /dev/null +++ b/src/glsl/pp/sl_pp_token_util.c @@ -0,0 +1,182 @@ +/************************************************************************** + * + * 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 <assert.h> +#include <stdlib.h> +#include "sl_pp_token_util.h" + + +int +sl_pp_token_buffer_init(struct sl_pp_token_buffer *buffer, + struct sl_pp_context *context) +{ + buffer->context = context; + buffer->size = 0; + buffer->capacity = 64; + buffer->tokens = malloc(buffer->capacity * sizeof(struct sl_pp_token_info)); + if (!buffer->tokens) { + return -1; + } + return 0; +} + +void +sl_pp_token_buffer_destroy(struct sl_pp_token_buffer *buffer) +{ + free(buffer->tokens); +} + +int +sl_pp_token_buffer_get(struct sl_pp_token_buffer *buffer, + struct sl_pp_token_info *out) +{ + /* Pop from stack first if not empty. */ + if (buffer->size) { + *out = buffer->tokens[--buffer->size]; + return 0; + } + + assert(buffer->context); + return sl_pp_token_get(buffer->context, out); +} + +void +sl_pp_token_buffer_unget(struct sl_pp_token_buffer *buffer, + const struct sl_pp_token_info *in) +{ + /* Resize if needed. */ + if (buffer->size == buffer->capacity) { + buffer->capacity += 64; + buffer->tokens = realloc(buffer->tokens, + buffer->capacity * sizeof(struct sl_pp_token_info)); + assert(buffer->tokens); + } + + /* Push token on stack. */ + buffer->tokens[buffer->size++] = *in; +} + +int +sl_pp_token_buffer_skip_white(struct sl_pp_token_buffer *buffer, + struct sl_pp_token_info *out) +{ + if (sl_pp_token_buffer_get(buffer, out)) { + return -1; + } + + while (out->token == SL_PP_WHITESPACE) { + if (sl_pp_token_buffer_get(buffer, out)) { + return -1; + } + } + + return 0; +} + + + +int +sl_pp_token_peek_init(struct sl_pp_token_peek *peek, + struct sl_pp_token_buffer *buffer) +{ + peek->buffer = buffer; + peek->size = 0; + peek->capacity = 64; + peek->tokens = malloc(peek->capacity * sizeof(struct sl_pp_token_info)); + if (!peek->tokens) { + return -1; + } + return 0; +} + +void +sl_pp_token_peek_destroy(struct sl_pp_token_peek *peek) +{ + /* Abort. */ + while (peek->size) { + sl_pp_token_buffer_unget(peek->buffer, &peek->tokens[--peek->size]); + } + free(peek->tokens); +} + +int +sl_pp_token_peek_get(struct sl_pp_token_peek *peek, + struct sl_pp_token_info *out) +{ + /* Get token from buffer. */ + if (sl_pp_token_buffer_get(peek->buffer, out)) { + return -1; + } + + /* Save it. */ + if (peek->size == peek->capacity) { + peek->capacity += 64; + peek->tokens = realloc(peek->tokens, + peek->capacity * sizeof(struct sl_pp_token_info)); + assert(peek->tokens); + } + peek->tokens[peek->size++] = *out; + return 0; +} + +void +sl_pp_token_peek_commit(struct sl_pp_token_peek *peek) +{ + peek->size = 0; +} + +int +sl_pp_token_peek_to_buffer(const struct sl_pp_token_peek *peek, + struct sl_pp_token_buffer *buffer) +{ + unsigned int i; + + if (sl_pp_token_buffer_init(buffer, NULL)) { + return -1; + } + for (i = peek->size; i > 0; i--) { + sl_pp_token_buffer_unget(buffer, &peek->tokens[i - 1]); + } + return 0; +} + +int +sl_pp_token_peek_skip_white(struct sl_pp_token_peek *peek, + struct sl_pp_token_info *out) +{ + if (sl_pp_token_peek_get(peek, out)) { + return -1; + } + + while (out->token == SL_PP_WHITESPACE) { + if (sl_pp_token_peek_get(peek, out)) { + return -1; + } + } + + return 0; +} |