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/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 2005-2006 Brian Paul 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, 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 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
* BRIAN PAUL 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.
*/
/**
* \file slang_compile_function.c
* slang front-end compiler
* \author Michal Krol
*/
#include "imports.h"
#include "slang_compile.h"
/* slang_fixup_table */
void
slang_fixup_table_init(slang_fixup_table * fix)
{
fix->table = NULL;
fix->count = 0;
}
void
slang_fixup_table_free(slang_fixup_table * fix)
{
slang_alloc_free(fix->table);
slang_fixup_table_init(fix);
}
/* slang_function */
int
slang_function_construct(slang_function * func)
{
func->kind = slang_func_ordinary;
if (!slang_variable_construct(&func->header))
return 0;
func->parameters = (slang_variable_scope *)
slang_alloc_malloc(sizeof(slang_variable_scope));
if (func->parameters == NULL) {
slang_variable_destruct(&func->header);
return 0;
}
_slang_variable_scope_ctr(func->parameters);
func->param_count = 0;
func->body = NULL;
func->address = ~0;
slang_fixup_table_init(&func->fixups);
return 1;
}
void
slang_function_destruct(slang_function * func)
{
slang_variable_destruct(&func->header);
slang_variable_scope_destruct(func->parameters);
slang_alloc_free(func->parameters);
if (func->body != NULL) {
slang_operation_destruct(func->body);
slang_alloc_free(func->body);
}
slang_fixup_table_free(&func->fixups);
}
/*
* slang_function_scope
*/
GLvoid
_slang_function_scope_ctr(slang_function_scope * self)
{
self->functions = NULL;
self->num_functions = 0;
self->outer_scope = NULL;
}
void
slang_function_scope_destruct(slang_function_scope * scope)
{
unsigned int i;
for (i = 0; i < scope->num_functions; i++)
slang_function_destruct(scope->functions + i);
slang_alloc_free(scope->functions);
}
/**
* Search a list of functions for a particular function by name.
* \param funcs the list of functions to search
* \param a_name the name to search for
* \param all_scopes if non-zero, search containing scopes too.
* \return pointer to found function, or NULL.
*/
int
slang_function_scope_find_by_name(slang_function_scope * funcs,
slang_atom a_name, int all_scopes)
{
unsigned int i;
for (i = 0; i < funcs->num_functions; i++)
if (a_name == funcs->functions[i].header.a_name)
return 1;
if (all_scopes && funcs->outer_scope != NULL)
return slang_function_scope_find_by_name(funcs->outer_scope, a_name, 1);
return 0;
}
/**
* Search a list of functions for a particular function (for implementing
* function calls. Matching is done by first comparing the function's name,
* then the function's parameter list.
*
* \param funcs the list of functions to search
* \param fun the function to search for
* \param all_scopes if non-zero, search containing scopes too.
* \return pointer to found function, or NULL.
*/
slang_function *
slang_function_scope_find(slang_function_scope * funcs, slang_function * fun,
int all_scopes)
{
unsigned int i;
for (i = 0; i < funcs->num_functions; i++) {
slang_function *f = &funcs->functions[i];
unsigned int j;
if (fun->header.a_name != f->header.a_name)
continue;
if (fun->param_count != f->param_count)
continue;
for (j = 0; j < fun->param_count; j++) {
if (!slang_type_specifier_equal
(&fun->parameters->variables[j].type.specifier,
&f->parameters->variables[j].type.specifier))
break;
}
if (j == fun->param_count)
return f;
}
if (all_scopes && funcs->outer_scope != NULL)
return slang_function_scope_find(funcs->outer_scope, fun, 1);
return NULL;
}
/*
* _slang_build_export_code_table()
*/
GLboolean
_slang_build_export_code_table(slang_export_code_table * tbl,
slang_function_scope * funs,
slang_code_unit * unit)
{
slang_atom mainAtom;
GLuint i;
mainAtom = slang_atom_pool_atom(tbl->atoms, "main");
if (mainAtom == SLANG_ATOM_NULL)
return GL_FALSE;
for (i = 0; i < funs->num_functions; i++) {
if (funs->functions[i].header.a_name == mainAtom) {
slang_function *fun = &funs->functions[i];
slang_export_code_entry *e;
slang_assemble_ctx A;
e = slang_export_code_table_add(tbl);
if (e == NULL)
return GL_FALSE;
e->address = unit->object->assembly.count;
e->name = slang_atom_pool_atom(tbl->atoms, "@main");
if (e->name == SLANG_ATOM_NULL)
return GL_FALSE;
A.file = &unit->object->assembly;
A.mach = &unit->object->machine;
A.atoms = &unit->object->atompool;
A.space.funcs = &unit->funs;
A.space.structs = &unit->structs;
A.space.vars = &unit->vars;
slang_assembly_file_push_label(&unit->object->assembly,
slang_asm_local_alloc, 20);
slang_assembly_file_push_label(&unit->object->assembly,
slang_asm_enter, 20);
_slang_assemble_function_call(&A, fun, NULL, 0, GL_FALSE);
slang_assembly_file_push(&unit->object->assembly, slang_asm_exit);
}
}
return GL_TRUE;
}
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