1 /* -*- c++ -*- */ 2 /* 3 * Copyright 2010 Intel Corporation 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 */ 24 25 #include "glsl_symbol_table.h" 26 27 class symbol_table_entry { 28 public: 29 /* Callers of this ralloc-based new need not call delete. It's 30 * easier to just ralloc_free 'ctx' (or any of its ancestors). */ 31 static void* operator new(size_t size, void *ctx) 32 { 33 void *entry = ralloc_size(ctx, size); 34 assert(entry != NULL); 35 return entry; 36 } 37 38 /* If the user *does* call delete, that's OK, we will just ralloc_free. */ 39 static void operator delete(void *entry) 40 { 41 ralloc_free(entry); 42 } 43 44 symbol_table_entry(ir_variable *v) : v(v), f(0), t(0), u(0) {} 45 symbol_table_entry(ir_function *f) : v(0), f(f), t(0), u(0) {} 46 symbol_table_entry(const glsl_type *t) : v(0), f(0), t(t), u(0) {} 47 symbol_table_entry(struct gl_uniform_block *u) : v(0), f(0), t(0), u(u) {} 48 49 ir_variable *v; 50 ir_function *f; 51 const glsl_type *t; 52 struct gl_uniform_block *u; 53 }; 54 55 glsl_symbol_table::glsl_symbol_table() 56 { 57 this->language_version = 120; 58 this->table = _mesa_symbol_table_ctor(); 59 this->mem_ctx = ralloc_context(NULL); 60 } 61 62 glsl_symbol_table::~glsl_symbol_table() 63 { 64 _mesa_symbol_table_dtor(table); 65 ralloc_free(mem_ctx); 66 } 67 68 void glsl_symbol_table::push_scope() 69 { 70 _mesa_symbol_table_push_scope(table); 71 } 72 73 void glsl_symbol_table::pop_scope() 74 { 75 _mesa_symbol_table_pop_scope(table); 76 } 77 78 bool glsl_symbol_table::name_declared_this_scope(const char *name) 79 { 80 return _mesa_symbol_table_symbol_scope(table, -1, name) == 0; 81 } 82 83 bool glsl_symbol_table::add_variable(ir_variable *v) 84 { 85 if (this->language_version == 110) { 86 /* In 1.10, functions and variables have separate namespaces. */ 87 symbol_table_entry *existing = get_entry(v->name); 88 if (name_declared_this_scope(v->name)) { 89 /* If there's already an existing function (not a constructor!) in 90 * the current scope, just update the existing entry to include 'v'. 91 */ 92 if (existing->v == NULL && existing->t == NULL) { 93 existing->v = v; 94 return true; 95 } 96 } else { 97 /* If not declared at this scope, add a new entry. But if an existing 98 * entry includes a function, propagate that to this block - otherwise 99 * the new variable declaration would shadow the function. 100 */ 101 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v); 102 if (existing != NULL) 103 entry->f = existing->f; 104 int added = _mesa_symbol_table_add_symbol(table, -1, v->name, entry); 105 assert(added == 0); 106 (void)added; 107 return true; 108 } 109 return false; 110 } 111 112 /* 1.20+ rules: */ 113 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v); 114 return _mesa_symbol_table_add_symbol(table, -1, v->name, entry) == 0; 115 } 116 117 bool glsl_symbol_table::add_type(const char *name, const glsl_type *t) 118 { 119 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(t); 120 return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0; 121 } 122 123 bool glsl_symbol_table::add_function(ir_function *f) 124 { 125 if (this->language_version == 110 && name_declared_this_scope(f->name)) { 126 /* In 1.10, functions and variables have separate namespaces. */ 127 symbol_table_entry *existing = get_entry(f->name); 128 if ((existing->f == NULL) && (existing->t == NULL)) { 129 existing->f = f; 130 return true; 131 } 132 } 133 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f); 134 return _mesa_symbol_table_add_symbol(table, -1, f->name, entry) == 0; 135 } 136 137 bool glsl_symbol_table::add_uniform_block(struct gl_uniform_block *u) 138 { 139 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(u); 140 return _mesa_symbol_table_add_symbol(table, -1, u->Name, entry) == 0; 141 } 142 143 void glsl_symbol_table::add_global_function(ir_function *f) 144 { 145 symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f); 146 int added = _mesa_symbol_table_add_global_symbol(table, -1, f->name, entry); 147 assert(added == 0); 148 (void)added; 149 } 150 151 ir_variable *glsl_symbol_table::get_variable(const char *name) 152 { 153 symbol_table_entry *entry = get_entry(name); 154 return entry != NULL ? entry->v : NULL; 155 } 156 157 const glsl_type *glsl_symbol_table::get_type(const char *name) 158 { 159 symbol_table_entry *entry = get_entry(name); 160 return entry != NULL ? entry->t : NULL; 161 } 162 163 ir_function *glsl_symbol_table::get_function(const char *name) 164 { 165 symbol_table_entry *entry = get_entry(name); 166 return entry != NULL ? entry->f : NULL; 167 } 168 169 symbol_table_entry *glsl_symbol_table::get_entry(const char *name) 170 { 171 return (symbol_table_entry *) 172 _mesa_symbol_table_find_symbol(table, -1, name); 173 } 174
