glsl: Implement `pragma' preprocessor directive.

Handle `optimize(on|off)' and `debug(on|off)' pragmas.

1 files changed, 106 insertions, 0 deletions

diff --git a/src/glsl/pp/sl_pp_pragma.c b/src/glsl/pp/sl_pp_pragma.c
new file mode 100644
index 0000000000..059bc6f288
--- /dev/null
+++ b/src/glsl/pp/sl_pp_pragma.c
@@ -0,0 +1,106 @@
+/**************************************************************************
+ * 
+ * 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 "sl_pp_process.h"
+
+
+int
+sl_pp_process_pragma(struct sl_pp_context *context,
+                     const struct sl_pp_token_info *input,
+                     unsigned int first,
+                     unsigned int last,
+                     struct sl_pp_process_state *state)
+{
+   const char *pragma_name = NULL;
+   struct sl_pp_token_info out;
+   const char *arg_name = NULL;
+
+   if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+      pragma_name = sl_pp_context_cstr(context, input[first].data.identifier);
+      first++;
+   }
+   if (!pragma_name) {
+      return 0;
+   }
+
+   if (!strcmp(pragma_name, "optimize")) {
+      out.token = SL_PP_PRAGMA_OPTIMIZE;
+   } else if (!strcmp(pragma_name, "debug")) {
+      out.token = SL_PP_PRAGMA_DEBUG;
+   } else {
+      return 0;
+   }
+
+   while (first < last && input[first].token == SL_PP_WHITESPACE) {
+      first++;
+   }
+
+   if (first < last && input[first].token == SL_PP_LPAREN) {
+      first++;
+   } else {
+      return 0;
+   }
+
+   while (first < last && input[first].token == SL_PP_WHITESPACE) {
+      first++;
+   }
+
+   if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+      arg_name = sl_pp_context_cstr(context, input[first].data.identifier);
+      first++;
+   }
+   if (!arg_name) {
+      return 0;
+   }
+
+   if (!strcmp(arg_name, "off")) {
+      out.data.pragma = 0;
+   } else if (!strcmp(arg_name, "on")) {
+      out.data.pragma = 1;
+   } else {
+      return 0;
+   }
+
+   while (first < last && input[first].token == SL_PP_WHITESPACE) {
+      first++;
+   }
+
+   if (first < last && input[first].token == SL_PP_RPAREN) {
+      first++;
+   } else {
+      return 0;
+   }
+
+   /* Ignore the tokens that follow. */
+
+   if (sl_pp_process_out(state, &out)) {
+      return -1;
+   }
+
+   return 0;
+}