| /* -*- 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 hieralloc-based new need not call delete. It's |
| * easier to just hieralloc_free 'ctx' (or any of its ancestors). */ |
| static void* operator new(size_t size, void *ctx) |
| { |
| void *entry = hieralloc_size(ctx, size); |
| assert(entry != NULL); |
| return entry; |
| } |
| |
| /* If the user *does* call delete, that's OK, we will just |
| * hieralloc_free in that case. Here, C++ will have already called the |
| * destructor so tell hieralloc not to do that again. */ |
| static void operator delete(void *table) |
| { |
| hieralloc_set_destructor(table, NULL); |
| hieralloc_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) : v(0), f(0), t(t) {} |
| |
| ir_variable *v; |
| ir_function *f; |
| const glsl_type *t; |
| }; |
| |
| glsl_symbol_table::glsl_symbol_table(void * ctx) |
| { |
| this->language_version = 120; |
| this->table = _mesa_symbol_table_ctor(); |
| this->mem_ctx = hieralloc_allocate(ctx, 0, "symbol table entries"); |
| } |
| |
| glsl_symbol_table::~glsl_symbol_table() |
| { |
| _mesa_symbol_table_dtor(table); |
| //hieralloc_free(mem_ctx); parent context free will free this |
| } |
| |
| 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) |
| { |
| if (this->language_version == 110) { |
| /* 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_function(ir_function *f) |
| { |
| if (this->language_version == 110 && 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); |
| } |
| |
| 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) |
| { |
| 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); |
| } |