1 files changed, 140 insertions, 0 deletions
diff --git a/src/glsl/pp/sl_pp_version.c b/src/glsl/pp/sl_pp_version.c
new file mode 100644
index 0000000000..db06523749
--- /dev/null
+++ b/src/glsl/pp/sl_pp_version.c
@@ -0,0 +1,140 @@
+/**************************************************************************
+ * 
+ * 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,
+              const struct sl_pp_token_info *input,
+              unsigned int *version,
+              unsigned int *tokens_eaten)
+{
+   unsigned int i = 0;
+   unsigned int line = context->line;
+
+   /* Default values if `#version' is not present. */
+   *version = 110;
+   *tokens_eaten = 0;
+
+   /* There can be multiple `#version' directives present.
+    * Accept the value of the last one.
+    */
+   for (;;) {
+      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) {
+         switch (input[i].token) {
+         case SL_PP_NEWLINE:
+            line++;
+            /* pass thru */
+         case SL_PP_WHITESPACE:
+            i++;
+            break;
+
+         case SL_PP_HASH:
+            i++;
+            found_hash = 1;
+            break;
+
+         default:
+            return 0;
+         }
+      }
+
+      /* Skip whitespace and seek for `version'. */
+      while (!found_version) {
+         switch (input[i].token) {
+         case SL_PP_WHITESPACE:
+            i++;
+            break;
+
+         case SL_PP_IDENTIFIER:
+            if (input[i].data.identifier != context->dict.version) {
+               return 0;
+            }
+            i++;
+            found_version = 1;
+            break;
+
+         default:
+            return 0;
+         }
+      }
+
+      /* Skip whitespace and seek for version number. */
+      while (!found_number) {
+         switch (input[i].token) {
+         case SL_PP_WHITESPACE:
+            i++;
+            break;
+
+         case SL_PP_UINT:
+            *version = atoi(sl_pp_context_cstr(context, input[i].data._uint));
+            i++;
+            found_number = 1;
+            break;
+
+         default:
+            strcpy(context->error_msg, "expected version number after `#version'");
+            return -1;
+         }
+      }
+
+      /* Skip whitespace and seek for either newline or eof. */
+      while (!found_end) {
+         switch (input[i].token) {
+         case SL_PP_WHITESPACE:
+            i++;
+            break;
+
+         case SL_PP_NEWLINE:
+            line++;
+            /* pass thru */
+         case SL_PP_EOF:
+            i++;
+            *tokens_eaten = i;
+            context->line = line;
+            found_end = 1;
+            break;
+
+         default:
+            strcpy(context->error_msg, "expected end of line after version number");
+            return -1;
+         }
+      }
+   }
+
+   /* Should not get here. */
+}