1 files changed, 238 insertions, 0 deletions
diff --git a/mesalib/src/glsl/pp/sl_pp_define.c b/mesalib/src/glsl/pp/sl_pp_define.c
new file mode 100644
index 000000000..808a6a0d4
--- /dev/null
+++ b/mesalib/src/glsl/pp/sl_pp_define.c
@@ -0,0 +1,238 @@
+/**************************************************************************
+ * 
+ * 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_context.h"
+#include "sl_pp_process.h"
+#include "sl_pp_public.h"
+
+
+static void
+skip_whitespace(const struct sl_pp_token_info *input,
+                unsigned int *first,
+                unsigned int last)
+{
+   while (*first < last && input[*first].token == SL_PP_WHITESPACE) {
+      (*first)++;
+   }
+}
+
+
+static int
+_parse_formal_args(struct sl_pp_context *context,
+                   const struct sl_pp_token_info *input,
+                   unsigned int *first,
+                   unsigned int last,
+                   struct sl_pp_macro *macro)
+{
+   struct sl_pp_macro_formal_arg **arg;
+
+   macro->num_args = 0;
+
+   skip_whitespace(input, first, last);
+   if (*first < last) {
+      if (input[*first].token == SL_PP_RPAREN) {
+         (*first)++;
+         return 0;
+      }
+   } else {
+      strcpy(context->error_msg, "expected either macro formal argument or `)'");
+      return -1;
+   }
+
+   arg = &macro->arg;
+
+   for (;;) {
+      if (*first < last && input[*first].token != SL_PP_IDENTIFIER) {
+         strcpy(context->error_msg, "expected macro formal argument");
+         return -1;
+      }
+
+      *arg = malloc(sizeof(struct sl_pp_macro_formal_arg));
+      if (!*arg) {
+         strcpy(context->error_msg, "out of memory");
+         return -1;
+      }
+
+      (**arg).name = input[*first].data.identifier;
+      (*first)++;
+
+      (**arg).next = NULL;
+      arg = &(**arg).next;
+
+      macro->num_args++;
+
+      skip_whitespace(input, first, last);
+      if (*first < last) {
+         if (input[*first].token == SL_PP_COMMA) {
+            (*first)++;
+            skip_whitespace(input, first, last);
+         } else if (input[*first].token == SL_PP_RPAREN) {
+            (*first)++;
+            return 0;
+         } else {
+            strcpy(context->error_msg, "expected either `,' or `)'");
+            return -1;
+         }
+      } else {
+         strcpy(context->error_msg, "expected either `,' or `)'");
+         return -1;
+      }
+   }
+
+   /* Should not gete here. */
+}
+
+
+int
+sl_pp_process_define(struct sl_pp_context *context,
+                     const struct sl_pp_token_info *input,
+                     unsigned int first,
+                     unsigned int last)
+{
+   int macro_name = -1;
+   struct sl_pp_macro *macro;
+   unsigned int i;
+   unsigned int body_len;
+   unsigned int j;
+
+   if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+      macro_name = input[first].data.identifier;
+      first++;
+   }
+   if (macro_name == -1) {
+      strcpy(context->error_msg, "expected macro name");
+      return -1;
+   }
+
+   /* Check for reserved macro names */
+   {
+      const char *name = sl_pp_context_cstr(context, macro_name);
+
+      if (strstr(name, "__")) {
+         strcpy(context->error_msg, "macro names containing `__' are reserved");
+         return 1;
+      }
+      if (name[0] == 'G' && name[1] == 'L' && name[2] == '_') {
+         strcpy(context->error_msg, "macro names prefixed with `GL_' are reserved");
+         return 1;
+      }
+   }
+
+   for (macro = context->macro; macro; macro = macro->next) {
+      if (macro->name == macro_name) {
+         break;
+      }
+   }
+
+   if (!macro) {
+      macro = sl_pp_macro_new();
+      if (!macro) {
+         strcpy(context->error_msg, "out of memory");
+         return -1;
+      }
+
+      *context->macro_tail = macro;
+      context->macro_tail = &macro->next;
+   } else {
+      sl_pp_macro_reset(macro);
+   }
+
+   macro->name = macro_name;
+
+   /*
+    * If there is no whitespace between macro name and left paren, a macro
+    * formal argument list follows. This is the only place where the presence
+    * of a whitespace matters and it's the only reason why we are dealing
+    * with whitespace at this level.
+    */
+   if (first < last && input[first].token == SL_PP_LPAREN) {
+      first++;
+      if (_parse_formal_args(context, input, &first, last, macro)) {
+         return -1;
+      }
+   }
+
+   /* Calculate body size, trim out whitespace, make room for EOF. */
+   body_len = 1;
+   for (i = first; i < last; i++) {
+      if (input[i].token != SL_PP_WHITESPACE) {
+         body_len++;
+      }
+   }
+
+   macro->body = malloc(sizeof(struct sl_pp_token_info) * body_len);
+   if (!macro->body) {
+      strcpy(context->error_msg, "out of memory");
+      return -1;
+   }
+
+   for (j = 0, i = first; i < last; i++) {
+      if (input[i].token != SL_PP_WHITESPACE) {
+         macro->body[j++] = input[i];
+      }
+   }
+   macro->body[j++].token = SL_PP_EOF;
+
+   return 0;
+}
+
+
+int
+sl_pp_process_undef(struct sl_pp_context *context,
+                    const struct sl_pp_token_info *input,
+                    unsigned int first,
+                    unsigned int last)
+{
+   int macro_name = -1;
+   struct sl_pp_macro **pmacro;
+   struct sl_pp_macro *macro;
+
+   if (first < last && input[first].token == SL_PP_IDENTIFIER) {
+      macro_name = input[first].data.identifier;
+   }
+   if (macro_name == -1) {
+      return 0;
+   }
+
+   for (pmacro = &context->macro; *pmacro; pmacro = &(**pmacro).next) {
+      if ((**pmacro).name == macro_name) {
+         break;
+      }
+   }
+   if (!*pmacro) {
+      return 0;
+   }
+
+   macro = *pmacro;
+   *pmacro = macro->next;
+   macro->next = NULL;
+   sl_pp_macro_free(macro);
+
+   return 0;
+}