1 files changed, 280 insertions, 0 deletions
diff --git a/src/compiler/glsl/glsl_symbol_table.cpp b/src/compiler/glsl/glsl_symbol_table.cpp
new file mode 100644
index 00000000000..6c682acf560
--- /dev/null
+++ b/src/compiler/glsl/glsl_symbol_table.cpp
@@ -0,0 +1,280 @@
+/* -*- c++ -*- */
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "glsl_symbol_table.h"
+#include "ast.h"
+
+class symbol_table_entry {
+public:
+   DECLARE_RALLOC_CXX_OPERATORS(symbol_table_entry);
+
+   bool add_interface(const glsl_type *i, enum ir_variable_mode mode)
+   {
+      const glsl_type **dest;
+
+      switch (mode) {
+      case ir_var_uniform:
+         dest = &ibu;
+         break;
+      case ir_var_shader_storage:
+         dest = &iss;
+         break;
+      case ir_var_shader_in:
+         dest = &ibi;
+         break;
+      case ir_var_shader_out:
+         dest = &ibo;
+         break;
+      default:
+         assert(!"Unsupported interface variable mode!");
+         return false;
+      }
+
+      if (*dest != NULL) {
+         return false;
+      } else {
+         *dest = i;
+         return true;
+      }
+   }
+
+   const glsl_type *get_interface(enum ir_variable_mode mode)
+   {
+      switch (mode) {
+      case ir_var_uniform:
+         return ibu;
+      case ir_var_shader_storage:
+         return iss;
+      case ir_var_shader_in:
+         return ibi;
+      case ir_var_shader_out:
+         return ibo;
+      default:
+         assert(!"Unsupported interface variable mode!");
+         return NULL;
+      }
+   }
+
+   symbol_table_entry(ir_variable *v)               :
+      v(v), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
+   symbol_table_entry(ir_function *f)               :
+      v(0), f(f), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
+   symbol_table_entry(const glsl_type *t)           :
+      v(0), f(0), t(t), ibu(0), iss(0), ibi(0), ibo(0), a(0) {}
+   symbol_table_entry(const glsl_type *t, enum ir_variable_mode mode) :
+      v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(0)
+   {
+      assert(t->is_interface());
+      add_interface(t, mode);
+   }
+   symbol_table_entry(const class ast_type_specifier *a):
+      v(0), f(0), t(0), ibu(0), iss(0), ibi(0), ibo(0), a(a) {}
+
+   ir_variable *v;
+   ir_function *f;
+   const glsl_type *t;
+   const glsl_type *ibu;
+   const glsl_type *iss;
+   const glsl_type *ibi;
+   const glsl_type *ibo;
+   const class ast_type_specifier *a;
+};
+
+glsl_symbol_table::glsl_symbol_table()
+{
+   this->separate_function_namespace = false;
+   this->table = _mesa_symbol_table_ctor();
+   this->mem_ctx = ralloc_context(NULL);
+}
+
+glsl_symbol_table::~glsl_symbol_table()
+{
+   _mesa_symbol_table_dtor(table);
+   ralloc_free(mem_ctx);
+}
+
+void glsl_symbol_table::push_scope()
+{
+   _mesa_symbol_table_push_scope(table);
+}
+
+void glsl_symbol_table::pop_scope()
+{
+   _mesa_symbol_table_pop_scope(table);
+}
+
+bool glsl_symbol_table::name_declared_this_scope(const char *name)
+{
+   return _mesa_symbol_table_symbol_scope(table, -1, name) == 0;
+}
+
+bool glsl_symbol_table::add_variable(ir_variable *v)
+{
+   assert(v->data.mode != ir_var_temporary);
+
+   if (this->separate_function_namespace) {
+      /* In 1.10, functions and variables have separate namespaces. */
+      symbol_table_entry *existing = get_entry(v->name);
+      if (name_declared_this_scope(v->name)) {
+	 /* If there's already an existing function (not a constructor!) in
+	  * the current scope, just update the existing entry to include 'v'.
+	  */
+	 if (existing->v == NULL && existing->t == NULL) {
+	    existing->v = v;
+	    return true;
+	 }
+      } else {
+	 /* If not declared at this scope, add a new entry.  But if an existing
+	  * entry includes a function, propagate that to this block - otherwise
+	  * the new variable declaration would shadow the function.
+	  */
+	 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v);
+	 if (existing != NULL)
+	    entry->f = existing->f;
+	 int added = _mesa_symbol_table_add_symbol(table, -1, v->name, entry);
+	 assert(added == 0);
+	 (void)added;
+	 return true;
+      }
+      return false;
+   }
+
+   /* 1.20+ rules: */
+   symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v);
+   return _mesa_symbol_table_add_symbol(table, -1, v->name, entry) == 0;
+}
+
+bool glsl_symbol_table::add_type(const char *name, const glsl_type *t)
+{
+   symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(t);
+   return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
+}
+
+bool glsl_symbol_table::add_interface(const char *name, const glsl_type *i,
+                                      enum ir_variable_mode mode)
+{
+   assert(i->is_interface());
+   symbol_table_entry *entry = get_entry(name);
+   if (entry == NULL) {
+      symbol_table_entry *entry =
+         new(mem_ctx) symbol_table_entry(i, mode);
+      bool add_interface_symbol_result =
+         _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
+      assert(add_interface_symbol_result);
+      return add_interface_symbol_result;
+   } else {
+      return entry->add_interface(i, mode);
+   }
+}
+
+bool glsl_symbol_table::add_function(ir_function *f)
+{
+   if (this->separate_function_namespace && name_declared_this_scope(f->name)) {
+      /* In 1.10, functions and variables have separate namespaces. */
+      symbol_table_entry *existing = get_entry(f->name);
+      if ((existing->f == NULL) && (existing->t == NULL)) {
+	 existing->f = f;
+	 return true;
+      }
+   }
+   symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f);
+   return _mesa_symbol_table_add_symbol(table, -1, f->name, entry) == 0;
+}
+
+bool glsl_symbol_table::add_default_precision_qualifier(const char *type_name,
+                                                        int precision)
+{
+   char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name);
+
+   ast_type_specifier *default_specifier = new(mem_ctx) ast_type_specifier(name);
+   default_specifier->default_precision = precision;
+
+   symbol_table_entry *entry =
+      new(mem_ctx) symbol_table_entry(default_specifier);
+
+   return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
+}
+
+void glsl_symbol_table::add_global_function(ir_function *f)
+{
+   symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f);
+   int added = _mesa_symbol_table_add_global_symbol(table, -1, f->name, entry);
+   assert(added == 0);
+   (void)added;
+}
+
+ir_variable *glsl_symbol_table::get_variable(const char *name)
+{
+   symbol_table_entry *entry = get_entry(name);
+   return entry != NULL ? entry->v : NULL;
+}
+
+const glsl_type *glsl_symbol_table::get_type(const char *name)
+{
+   symbol_table_entry *entry = get_entry(name);
+   return entry != NULL ? entry->t : NULL;
+}
+
+const glsl_type *glsl_symbol_table::get_interface(const char *name,
+                                                  enum ir_variable_mode mode)
+{
+   symbol_table_entry *entry = get_entry(name);
+   return entry != NULL ? entry->get_interface(mode) : NULL;
+}
+
+ir_function *glsl_symbol_table::get_function(const char *name)
+{
+   symbol_table_entry *entry = get_entry(name);
+   return entry != NULL ? entry->f : NULL;
+}
+
+int glsl_symbol_table::get_default_precision_qualifier(const char *type_name)
+{
+   char *name = ralloc_asprintf(mem_ctx, "#default_precision_%s", type_name);
+   symbol_table_entry *entry = get_entry(name);
+   if (!entry)
+      return ast_precision_none;
+   return entry->a->default_precision;
+}
+
+symbol_table_entry *glsl_symbol_table::get_entry(const char *name)
+{
+   return (symbol_table_entry *)
+      _mesa_symbol_table_find_symbol(table, -1, name);
+}
+
+void
+glsl_symbol_table::disable_variable(const char *name)
+{
+   /* Ideally we would remove the variable's entry from the symbol table, but
+    * that would be difficult.  Fortunately, since this is only used for
+    * built-in variables, it won't be possible for the shader to re-introduce
+    * the variable later, so all we really need to do is to make sure that
+    * further attempts to access it using get_variable() will return NULL.
+    */
+   symbol_table_entry *entry = get_entry(name);
+   if (entry != NULL) {
+      entry->v = NULL;
+   }
+}