/* -*- 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:
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_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_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), ibi(0), ibo(0), a(0) {}
symbol_table_entry(ir_function *f) :
v(0), f(f), t(0), ibu(0), ibi(0), ibo(0), a(0) {}
symbol_table_entry(const glsl_type *t) :
v(0), f(0), t(t), ibu(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), 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), ibi(0), ibo(0), a(a) {}
ir_variable *v;
ir_function *f;
const glsl_type *t;
const glsl_type *ibu;
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;
}
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;
}
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;
}
}