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-rw-r--r--mesalib/src/glsl/pp/sl_pp_token_util.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/mesalib/src/glsl/pp/sl_pp_token_util.c b/mesalib/src/glsl/pp/sl_pp_token_util.c
new file mode 100644
index 000000000..c85263d9a
--- /dev/null
+++ b/mesalib/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;
+}