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/* -*- 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"
class symbol_table_entry {
public:
/* Callers of this talloc-based new need not call delete. It's
* easier to just talloc_free 'ctx' (or any of its ancestors). */
static void* operator new(size_t size, void *ctx)
{
void *entry = talloc_size(ctx, size);
assert(entry != NULL);
return entry;
}
/* If the user *does* call delete, that's OK, we will just
* talloc_free in that case. Here, C++ will have already called the
* destructor so tell talloc not to do that again. */
static void operator delete(void *table)
{
talloc_set_destructor(table, NULL);
talloc_free(table);
}
symbol_table_entry(ir_variable *v) : v(v), f(0), t(0) {}
symbol_table_entry(ir_function *f) : v(0), f(f), t(0) {}
symbol_table_entry(const glsl_type *t, ir_function *f) : v(0), f(f), t(t) {}
ir_variable *v;
ir_function *f;
const glsl_type *t;
};
glsl_symbol_table::glsl_symbol_table()
{
this->language_version = 120;
this->table = _mesa_symbol_table_ctor();
this->mem_ctx = talloc_init("symbol table entries");
}
glsl_symbol_table::~glsl_symbol_table()
{
_mesa_symbol_table_dtor(table);
talloc_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(const char *name, ir_variable *v)
{
if (this->language_version == 110) {
/* In 1.10, functions and variables have separate namespaces. */
symbol_table_entry *existing = get_entry(name);
if (name_declared_this_scope(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, 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, name, entry) == 0;
}
bool glsl_symbol_table::add_type(const char *name, const glsl_type *t,
ir_function *constructor)
{
symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(t, constructor);
return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0;
}
bool glsl_symbol_table::add_function(const char *name, ir_function *f)
{
if (this->language_version == 110 && name_declared_this_scope(name)) {
/* In 1.10, functions and variables have separate namespaces. */
symbol_table_entry *existing = get_entry(name);
if (existing->f == 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, name, entry) == 0;
}
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;
}
ir_function *glsl_symbol_table::get_function(const char *name,
bool return_constructors)
{
symbol_table_entry *entry = get_entry(name);
// If there's a type, the function is a constructor; caller may not want it.
if (entry != NULL && (return_constructors || entry->t == NULL))
return entry->f;
return NULL;
}
symbol_table_entry *glsl_symbol_table::get_entry(const char *name)
{
return (symbol_table_entry *)
_mesa_symbol_table_find_symbol(table, -1, name);
}
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