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1901 | serge | 1 | /* -*- c++ -*- */ |
2 | /* |
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3 | * Copyright © 2010 Intel Corporation |
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4 | * |
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5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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6 | * copy of this software and associated documentation files (the "Software"), |
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7 | * to deal in the Software without restriction, including without limitation |
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8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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9 | * and/or sell copies of the Software, and to permit persons to whom the |
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10 | * Software is furnished to do so, subject to the following conditions: |
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11 | * |
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12 | * The above copyright notice and this permission notice (including the next |
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13 | * paragraph) shall be included in all copies or substantial portions of the |
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14 | * Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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22 | * DEALINGS IN THE SOFTWARE. |
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23 | */ |
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24 | |||
25 | #include "glsl_symbol_table.h" |
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26 | |||
27 | class symbol_table_entry { |
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28 | public: |
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29 | /* Callers of this ralloc-based new need not call delete. It's |
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30 | * easier to just ralloc_free 'ctx' (or any of its ancestors). */ |
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31 | static void* operator new(size_t size, void *ctx) |
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32 | { |
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33 | void *entry = ralloc_size(ctx, size); |
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34 | assert(entry != NULL); |
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35 | return entry; |
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36 | } |
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37 | |||
38 | /* If the user *does* call delete, that's OK, we will just ralloc_free. */ |
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39 | static void operator delete(void *entry) |
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40 | { |
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41 | ralloc_free(entry); |
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42 | } |
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43 | |||
44 | symbol_table_entry(ir_variable *v) : v(v), f(0), t(0) {} |
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45 | symbol_table_entry(ir_function *f) : v(0), f(f), t(0) {} |
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46 | symbol_table_entry(const glsl_type *t) : v(0), f(0), t(t) {} |
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47 | |||
48 | ir_variable *v; |
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49 | ir_function *f; |
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50 | const glsl_type *t; |
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51 | }; |
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52 | |||
53 | glsl_symbol_table::glsl_symbol_table() |
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54 | { |
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55 | this->language_version = 120; |
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56 | this->table = _mesa_symbol_table_ctor(); |
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57 | this->mem_ctx = ralloc_context(NULL); |
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58 | } |
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59 | |||
60 | glsl_symbol_table::~glsl_symbol_table() |
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61 | { |
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62 | _mesa_symbol_table_dtor(table); |
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63 | ralloc_free(mem_ctx); |
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64 | } |
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65 | |||
66 | void glsl_symbol_table::push_scope() |
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67 | { |
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68 | _mesa_symbol_table_push_scope(table); |
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69 | } |
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70 | |||
71 | void glsl_symbol_table::pop_scope() |
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72 | { |
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73 | _mesa_symbol_table_pop_scope(table); |
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74 | } |
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75 | |||
76 | bool glsl_symbol_table::name_declared_this_scope(const char *name) |
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77 | { |
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78 | return _mesa_symbol_table_symbol_scope(table, -1, name) == 0; |
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79 | } |
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80 | |||
81 | bool glsl_symbol_table::add_variable(ir_variable *v) |
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82 | { |
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83 | if (this->language_version == 110) { |
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84 | /* In 1.10, functions and variables have separate namespaces. */ |
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85 | symbol_table_entry *existing = get_entry(v->name); |
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86 | if (name_declared_this_scope(v->name)) { |
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87 | /* If there's already an existing function (not a constructor!) in |
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88 | * the current scope, just update the existing entry to include 'v'. |
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89 | */ |
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90 | if (existing->v == NULL && existing->t == NULL) { |
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91 | existing->v = v; |
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92 | return true; |
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93 | } |
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94 | } else { |
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95 | /* If not declared at this scope, add a new entry. But if an existing |
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96 | * entry includes a function, propagate that to this block - otherwise |
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97 | * the new variable declaration would shadow the function. |
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98 | */ |
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99 | symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v); |
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100 | if (existing != NULL) |
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101 | entry->f = existing->f; |
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102 | int added = _mesa_symbol_table_add_symbol(table, -1, v->name, entry); |
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103 | assert(added == 0); |
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104 | (void)added; |
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105 | return true; |
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106 | } |
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107 | return false; |
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108 | } |
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109 | |||
110 | /* 1.20+ rules: */ |
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111 | symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(v); |
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112 | return _mesa_symbol_table_add_symbol(table, -1, v->name, entry) == 0; |
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113 | } |
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114 | |||
115 | bool glsl_symbol_table::add_type(const char *name, const glsl_type *t) |
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116 | { |
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117 | symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(t); |
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118 | return _mesa_symbol_table_add_symbol(table, -1, name, entry) == 0; |
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119 | } |
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120 | |||
121 | bool glsl_symbol_table::add_function(ir_function *f) |
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122 | { |
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123 | if (this->language_version == 110 && name_declared_this_scope(f->name)) { |
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124 | /* In 1.10, functions and variables have separate namespaces. */ |
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125 | symbol_table_entry *existing = get_entry(f->name); |
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126 | if ((existing->f == NULL) && (existing->t == NULL)) { |
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127 | existing->f = f; |
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128 | return true; |
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129 | } |
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130 | } |
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131 | symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f); |
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132 | return _mesa_symbol_table_add_symbol(table, -1, f->name, entry) == 0; |
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133 | } |
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134 | |||
135 | void glsl_symbol_table::add_global_function(ir_function *f) |
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136 | { |
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137 | symbol_table_entry *entry = new(mem_ctx) symbol_table_entry(f); |
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138 | int added = _mesa_symbol_table_add_global_symbol(table, -1, f->name, entry); |
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139 | assert(added == 0); |
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140 | } |
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141 | |||
142 | ir_variable *glsl_symbol_table::get_variable(const char *name) |
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143 | { |
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144 | symbol_table_entry *entry = get_entry(name); |
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145 | return entry != NULL ? entry->v : NULL; |
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146 | } |
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147 | |||
148 | const glsl_type *glsl_symbol_table::get_type(const char *name) |
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149 | { |
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150 | symbol_table_entry *entry = get_entry(name); |
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151 | return entry != NULL ? entry->t : NULL; |
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152 | } |
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153 | |||
154 | ir_function *glsl_symbol_table::get_function(const char *name) |
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155 | { |
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156 | symbol_table_entry *entry = get_entry(name); |
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157 | return entry != NULL ? entry->f : NULL; |
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158 | } |
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159 | |||
160 | symbol_table_entry *glsl_symbol_table::get_entry(const char *name) |
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161 | { |
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162 | return (symbol_table_entry *) |
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163 | _mesa_symbol_table_find_symbol(table, -1, name); |
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164 | } |