aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glsl/pp/sl_pp_version.c
diff options
context:
space:
mode:
Diffstat (limited to 'mesalib/src/glsl/pp/sl_pp_version.c')
-rw-r--r--mesalib/src/glsl/pp/sl_pp_version.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/mesalib/src/glsl/pp/sl_pp_version.c b/mesalib/src/glsl/pp/sl_pp_version.c
new file mode 100644
index 000000000..3c995b775
--- /dev/null
+++ b/mesalib/src/glsl/pp/sl_pp_version.c
@@ -0,0 +1,161 @@
+/**************************************************************************
+ *
+ * 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_public.h"
+#include "sl_pp_context.h"
+
+
+int
+sl_pp_version(struct sl_pp_context *context,
+ unsigned int *version)
+{
+ struct sl_pp_token_peek peek;
+ unsigned int line = context->line;
+
+ /* Default values if `#version' is not present. */
+ *version = 110;
+
+ if (sl_pp_token_peek_init(&peek, &context->tokens)) {
+ return -1;
+ }
+
+ /* There can be multiple `#version' directives present.
+ * Accept the value of the last one.
+ */
+ for (;;) {
+ struct sl_pp_token_info input;
+ int found_hash = 0;
+ int found_version = 0;
+ int found_number = 0;
+ int found_end = 0;
+
+ /* Skip whitespace and newlines and seek for hash. */
+ while (!found_hash) {
+ if (sl_pp_token_peek_get(&peek, &input)) {
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+
+ switch (input.token) {
+ case SL_PP_NEWLINE:
+ line++;
+ break;
+
+ case SL_PP_WHITESPACE:
+ break;
+
+ case SL_PP_HASH:
+ found_hash = 1;
+ break;
+
+ default:
+ sl_pp_token_peek_destroy(&peek);
+ return 0;
+ }
+ }
+
+ /* Skip whitespace and seek for `version'. */
+ while (!found_version) {
+ if (sl_pp_token_peek_get(&peek, &input)) {
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+
+ switch (input.token) {
+ case SL_PP_WHITESPACE:
+ break;
+
+ case SL_PP_IDENTIFIER:
+ if (input.data.identifier != context->dict.version) {
+ sl_pp_token_peek_destroy(&peek);
+ return 0;
+ }
+ found_version = 1;
+ break;
+
+ default:
+ sl_pp_token_peek_destroy(&peek);
+ return 0;
+ }
+ }
+
+ sl_pp_token_peek_commit(&peek);
+
+ /* Skip whitespace and seek for version number. */
+ while (!found_number) {
+ if (sl_pp_token_buffer_get(&context->tokens, &input)) {
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+
+ switch (input.token) {
+ case SL_PP_WHITESPACE:
+ break;
+
+ case SL_PP_UINT:
+ *version = atoi(sl_pp_context_cstr(context, input.data._uint));
+ found_number = 1;
+ break;
+
+ default:
+ strcpy(context->error_msg, "expected version number after `#version'");
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+ }
+
+ /* Skip whitespace and seek for either newline or eof. */
+ while (!found_end) {
+ if (sl_pp_token_buffer_get(&context->tokens, &input)) {
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+
+ switch (input.token) {
+ case SL_PP_WHITESPACE:
+ break;
+
+ case SL_PP_NEWLINE:
+ line++;
+ /* pass thru */
+ case SL_PP_EOF:
+ context->line = line;
+ found_end = 1;
+ break;
+
+ default:
+ strcpy(context->error_msg, "expected end of line after version number");
+ sl_pp_token_peek_destroy(&peek);
+ return -1;
+ }
+ }
+ }
+
+ /* Should not get here. */
+}