From e49d06e61955208b9cd3e18469034e7447394b95 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 24 Nov 2006 19:01:14 +0000
Subject: [PATCH] new slang_variable_scope_grow() function

---
 src/mesa/shader/slang/slang_compile.c         | 46 ++++++-------------
 .../shader/slang/slang_compile_variable.c     | 21 +++++++++
 .../shader/slang/slang_compile_variable.h     |  3 ++
 3 files changed, 38 insertions(+), 32 deletions(-)

diff --git a/src/mesa/shader/slang/slang_compile.c b/src/mesa/shader/slang/slang_compile.c
index 77a293ea45e..93c7fb0cdbf 100644
--- a/src/mesa/shader/slang/slang_compile.c
+++ b/src/mesa/shader/slang/slang_compile.c
@@ -1,6 +1,6 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.6
+ * Version:  6.5.2
  *
  * Copyright (C) 2005-2006  Brian Paul   All Rights Reserved.
  *
@@ -42,14 +42,16 @@
  * may be accepted resulting in undefined behaviour.
  */
 
-/* slang_var_pool */
 
+
+/**
+ * Allocate storage for a variable of 'size' bytes from given pool.
+ * Return the allocated address for the variable.
+ */
 static GLuint
 slang_var_pool_alloc(slang_var_pool * pool, unsigned int size)
 {
-   GLuint addr;
-
-   addr = pool->next_addr;
+   const GLuint addr = pool->next_addr;
    pool->next_addr += size;
    return addr;
 }
@@ -432,22 +434,13 @@ parse_struct_field(slang_parse_ctx * C, slang_output_ctx * O,
       return 0;
 
    do {
-      slang_variable *var;
-
-      st->fields->variables =
-         (slang_variable *) slang_alloc_realloc(st->fields->variables,
-                                                st->fields->num_variables *
-                                                sizeof(slang_variable),
-                                                (st->fields->num_variables +
-                                                 1) * sizeof(slang_variable));
-      if (st->fields->variables == NULL) {
+      slang_variable *var = slang_variable_scope_grow(st->fields);
+      if (!var) {
          slang_info_log_memory(C->L);
          return 0;
       }
-      var = &st->fields->variables[st->fields->num_variables];
       if (!slang_variable_construct(var))
          return 0;
-      st->fields->num_variables++;
       if (!parse_struct_field_var(C, &o, var, sp))
          return 0;
    }
@@ -1222,6 +1215,7 @@ parse_expression(slang_parse_ctx * C, slang_output_ctx * O,
             if (!parse_child_operation(C, O, op, 0))
                return 0;
          C->I++;
+
          if (!C->parsing_builtin
              && !slang_function_scope_find_by_name(O->funs, op->a_id, 1)) {
             const char *id;
@@ -1479,20 +1473,13 @@ parse_function_prototype(slang_parse_ctx * C, slang_output_ctx * O,
 
    /* parse function parameters */
    while (*C->I++ == PARAMETER_NEXT) {
-      slang_variable *p;
-
-      func->parameters->variables = (slang_variable *)
-         slang_alloc_realloc(func->parameters->variables,
-                             func->parameters->num_variables * sizeof(slang_variable),
-                             (func->parameters->num_variables + 1) * sizeof(slang_variable));
-      if (func->parameters->variables == NULL) {
+      slang_variable *p = slang_variable_scope_grow(func->parameters);
+      if (!p) {
          slang_info_log_memory(C->L);
          return 0;
       }
-      p = &func->parameters->variables[func->parameters->num_variables];
       if (!slang_variable_construct(p))
          return 0;
-      func->parameters->num_variables++;
       if (!parse_parameter_declaration(C, O, p))
          return 0;
    }
@@ -1662,18 +1649,13 @@ parse_init_declarator(slang_parse_ctx * C, slang_output_ctx * O,
       return 1;
 
    /* make room for the new variable and initialize it */
-   O->vars->variables = (slang_variable *)
-      slang_alloc_realloc(O->vars->variables,
-                          O->vars->num_variables * sizeof(slang_variable),
-                          (O->vars->num_variables + 1) * sizeof(slang_variable));
-   if (O->vars->variables == NULL) {
+   var = slang_variable_scope_grow(O->vars);
+   if (!var) {
       slang_info_log_memory(C->L);
       return 0;
    }
-   var = &O->vars->variables[O->vars->num_variables];
    if (!slang_variable_construct(var))
       return 0;
-   O->vars->num_variables++;
 
    /* copy the declarator qualifier type, parse the identifier */
    var->global = C->global_scope;
diff --git a/src/mesa/shader/slang/slang_compile_variable.c b/src/mesa/shader/slang/slang_compile_variable.c
index 92951b85bbc..a37deddff10 100644
--- a/src/mesa/shader/slang/slang_compile_variable.c
+++ b/src/mesa/shader/slang/slang_compile_variable.c
@@ -181,6 +181,27 @@ slang_variable_scope_copy(slang_variable_scope * x,
    return 1;
 }
 
+
+/**
+ * Grow the variable list by one.
+ * \return  pointer to space for the new variable.
+ */
+slang_variable *
+slang_variable_scope_grow(slang_variable_scope *scope)
+{
+   const int n = scope->num_variables;
+   scope->variables = (slang_variable *)
+         slang_alloc_realloc(scope->variables,
+                             n * sizeof(slang_variable),
+                             (n + 1) * sizeof(slang_variable));
+   if (!scope->variables)
+      return NULL;
+   scope->num_variables++;
+   return scope->variables + n;
+}
+
+
+
 /* slang_variable */
 
 int
diff --git a/src/mesa/shader/slang/slang_compile_variable.h b/src/mesa/shader/slang/slang_compile_variable.h
index 2f358860f82..b0910e855ea 100644
--- a/src/mesa/shader/slang/slang_compile_variable.h
+++ b/src/mesa/shader/slang/slang_compile_variable.h
@@ -81,6 +81,7 @@ typedef struct slang_variable_
    GLuint address2;                 /**< Storage location */
    GLuint size;                     /**< Variable's size in bytes */
    GLboolean global;                /**< A global var? */
+   void *aux;                       /**< Used during code gen */
 } slang_variable;
 
 
@@ -104,6 +105,8 @@ extern int
 slang_variable_scope_copy(slang_variable_scope *,
                           const slang_variable_scope *);
 
+slang_variable *
+slang_variable_scope_grow(slang_variable_scope *);
 
 extern int
 slang_variable_construct(slang_variable *);
-- 
2.30.2