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annotate gcc/gengtype.h @ 108:7ad14f446135

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add CbC-example/rectypeTest/
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Thu, 14 Jun 2012 20:30:24 +0900
parents f6334be47118
children 04ced10e8804
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1 /* Process source files and output type information.
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2 Copyright (C) 2002, 2003, 2004, 2007, 2008, 2010
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3 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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21 #ifndef GCC_GENGTYPE_H
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22 #define GCC_GENGTYPE_H
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24 /* Sets of accepted source languages like C, C++, Ada... are
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25 represented by a bitmap. */
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26 typedef unsigned lang_bitmap;
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28 /* Variable length structure representing an input file. A hash table
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29 ensure uniqueness for a given input file name. The only function
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30 allocating input_file-s is input_file_by_name. */
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31 struct input_file_st
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32 {
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33 struct outf* inpoutf; /* Cached corresponding output file, computed
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34 in get_output_file_with_visibility. */
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35 lang_bitmap inpbitmap; /* The set of languages using this file. */
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36 char inpname[1]; /* A variable-length array, ended by a null
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37 char. */
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38 };
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39 typedef struct input_file_st input_file;
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40
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41 /* A file position, mostly for error messages.
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42 The FILE element may be compared using pointer equality. */
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43 struct fileloc
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44 {
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45 const input_file *file;
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46 int line;
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47 };
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49
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50 /* Table of all input files and its size. */
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51 extern const input_file** gt_files;
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52 extern size_t num_gt_files;
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54 /* A number of places use the name of this "gengtype.c" file for a
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55 location for things that we can't rely on the source to define. We
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56 also need to refer to the "system.h" file specifically. These two
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57 pointers are initialized early in main. */
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58 extern input_file* this_file;
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59 extern input_file* system_h_file;
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60
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61 /* Retrieve or create the input_file for a given name, which is a file
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62 path. This is the only function allocating input_file-s and it is
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63 hash-consing them. */
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64 input_file* input_file_by_name (const char* name);
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65
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66 /* For F an input_file, return the relative path to F from $(srcdir)
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67 if the latter is a prefix in F, NULL otherwise. */
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68 const char *get_file_srcdir_relative_path (const input_file *inpf);
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69
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70 /* Get the name of an input file. */
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71 static inline const char*
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72 get_input_file_name (const input_file *inpf)
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73 {
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74 if (inpf)
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75 return inpf->inpname;
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76 return NULL;
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77 }
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78
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79 /* Return a bitmap which has bit `1 << BASE_FILE_<lang>' set iff
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80 INPUT_FILE is used by <lang>.
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81
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82 This function should be written to assume that a file _is_ used
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83 if the situation is unclear. If it wrongly assumes a file _is_ used,
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84 a linker error will result. If it wrongly assumes a file _is not_ used,
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85 some GC roots may be missed, which is a much harder-to-debug problem.
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86 */
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87
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88 static inline lang_bitmap
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89 get_lang_bitmap (const input_file* inpf)
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90 {
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91 if (inpf == NULL)
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92 return 0;
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93 return inpf->inpbitmap;
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94 }
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95
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96 /* Set the bitmap returned by get_lang_bitmap. The only legitimate
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97 callers of this function are read_input_list & read_state_*. */
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98 static inline void
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99 set_lang_bitmap (input_file* inpf, lang_bitmap n)
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100 {
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101 gcc_assert (inpf);
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102 inpf->inpbitmap = n;
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103 }
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104
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105 /* Vector of per-language directories. */
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106 extern const char **lang_dir_names;
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107 extern size_t num_lang_dirs;
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108
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109 /* Data types handed around within, but opaque to, the lexer and parser. */
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110 typedef struct pair *pair_p;
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111 typedef struct type *type_p;
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112 typedef const struct type *const_type_p;
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113 typedef struct options *options_p;
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114
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115 /* Variables used to communicate between the lexer and the parser. */
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116 extern int lexer_toplevel_done;
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117 extern struct fileloc lexer_line;
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118
67
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119 /* Various things, organized as linked lists, needed both in
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120 gengtype.c & in gengtype-state.c files. */
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121 extern pair_p typedefs;
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122 extern type_p structures;
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123 extern type_p param_structs;
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124 extern pair_p variables;
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125
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126
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127
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128 /* Discrimating kind of types we can understand. */
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129
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130 enum typekind {
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131 TYPE_NONE=0, /* Never used, so zeroed memory is invalid. */
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132 TYPE_SCALAR, /* Scalar types like char. */
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133 TYPE_STRING, /* The string type. */
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134 TYPE_STRUCT, /* Type for GTY-ed structs. */
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135 TYPE_UNION, /* Type for GTY-ed discriminated unions. */
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136 TYPE_POINTER, /* Pointer type to GTY-ed type. */
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137 TYPE_ARRAY, /* Array of GTY-ed types. */
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138 TYPE_LANG_STRUCT, /* GCC front-end language specific structs.
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139 Various languages may have homonymous but
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140 different structs. */
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141 TYPE_PARAM_STRUCT /* Type for parametrized structs, e.g. hash_t
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142 hash-tables, ... See (param_is, use_param,
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143 param1_is, param2_is,... use_param1,
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144 use_param_2,... use_params) GTY
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145 options. */
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146 };
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147
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148 /* Discriminating kind for options. */
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149 enum option_kind {
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150 OPTION_NONE=0, /* Never used, so zeroed memory is invalid. */
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151 OPTION_STRING, /* A string-valued option. Most options are
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152 strings. */
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153 OPTION_TYPE, /* A type-valued option. */
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154 OPTION_NESTED /* Option data for 'nested_ptr'. */
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155 };
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156
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157
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158 /* A way to pass data through to the output end. */
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159 struct options {
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160 struct options *next; /* next option of the same pair. */
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161 const char *name; /* GTY option name. */
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162 enum option_kind kind; /* discriminating option kind. */
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163 union {
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164 const char* string; /* When OPTION_STRING. */
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165 type_p type; /* When OPTION_TYPE. */
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166 struct nested_ptr_data* nested; /* when OPTION_NESTED. */
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167 } info;
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168 };
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169
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170
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171 /* Option data for the 'nested_ptr' option. */
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172 struct nested_ptr_data {
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173 type_p type;
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174 const char *convert_to;
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175 const char *convert_from;
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176 };
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177
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178 /* Some functions to create various options structures with name NAME
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179 and info INFO. NEXT is the next option in the chain. */
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180
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181 /* Create a string option. */
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182 options_p create_string_option (options_p next, const char* name,
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183 const char* info);
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184
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185 /* Create a type option. */
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186 options_p create_type_option (options_p next, const char* name,
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187 type_p info);
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188
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189 /* Create a nested option. */
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190 options_p create_nested_option (options_p next, const char* name,
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191 struct nested_ptr_data* info);
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192
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193 /* Create a nested pointer option. */
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194 options_p create_nested_ptr_option (options_p, type_p t,
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195 const char *from, const char *to);
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196
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197 /* A name and a type. */
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198 struct pair {
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199 pair_p next; /* The next pair in the linked list. */
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200 const char *name; /* The defined name. */
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201 type_p type; /* Its GTY-ed type. */
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202 struct fileloc line; /* The file location. */
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203 options_p opt; /* GTY options, as a linked list. */
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204 };
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205
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206 /* Usage information for GTY-ed types. Gengtype has to care only of
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207 used GTY-ed types. Types are initially unused, and their usage is
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208 computed by set_gc_used_type and set_gc_used functions. */
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209
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210 enum gc_used_enum {
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211
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212 /* We need that zeroed types are initially unused. */
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213 GC_UNUSED=0,
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214
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215 /* The GTY-ed type is used, e.g by a GTY-ed variable or a field
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216 inside a GTY-ed used type. */
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217 GC_USED,
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218
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219 /* For GTY-ed structures whose definitions we haven't seen so far
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220 when we encounter a pointer to it that is annotated with
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221 ``maybe_undef''. If after reading in everything we don't have
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222 source file information for it, we assume that it never has been
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223 defined. */
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224 GC_MAYBE_POINTED_TO,
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225
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226 /* For known GTY-ed structures which are pointed to by GTY-ed
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227 variables or fields. */
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228 GC_POINTED_TO
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229 };
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230
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231 /* We can have at most ten type parameters in parameterized structures. */
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232 #define NUM_PARAM 10
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233
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234 /* Our type structure describes all types handled by gengtype. */
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235 struct type {
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236 /* Discriminating kind, cannot be TYPE_NONE. */
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237 enum typekind kind;
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238
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239 /* For top-level structs or unions, the 'next' field links the
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240 global list 'structures' or 'param_structs'; for lang_structs,
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241 their homonymous structs are linked using this 'next' field. The
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242 homonymous list starts at the s.lang_struct field of the
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243 lang_struct. See the new_structure function for details. This is
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244 tricky! */
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245 type_p next;
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246
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247 /* State number used when writing & reading the persistent state. A
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248 type with a positive number has already been written. For ease
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249 of debugging, newly allocated types have a unique negative
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250 number. */
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251 int state_number;
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252
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253 /* Each GTY-ed type which is pointed to by some GTY-ed type knows
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254 the GTY pointer type pointing to it. See create_pointer
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255 function. */
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256 type_p pointer_to;
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257
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258 /* Type usage information, computed by set_gc_used_type and
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259 set_gc_used functions. */
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260 enum gc_used_enum gc_used;
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261
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262 /* The following union is discriminated by the 'kind' field above. */
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263 union {
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264 /* TYPE__NONE is impossible. */
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265
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266 /* when TYPE_POINTER: */
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267 type_p p;
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268
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269 /* when TYPE_STRUCT or TYPE_UNION or TYPE_LANG_STRUCT, we have an
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270 aggregate type containing fields: */
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271 struct {
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272 const char *tag; /* the aggragate tag, if any. */
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273 struct fileloc line; /* the source location. */
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274 pair_p fields; /* the linked list of fields. */
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275 options_p opt; /* the GTY options if any. */
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276 lang_bitmap bitmap; /* the set of front-end languages
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277 using that GTY-ed aggregate. */
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278 /* For TYPE_LANG_STRUCT, the lang_struct field gives the first
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279 element of a linked list of homonymous struct or union types.
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280 Within this list, each homonymous type has as its lang_struct
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281 field the original TYPE_LANG_STRUCT type. This is a dirty
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282 trick, see the new_structure function for details. */
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283 type_p lang_struct;
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284 } s;
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285
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286 /* when TYPE_SCALAR: */
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287 bool scalar_is_char;
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288
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289 /* when TYPE_ARRAY: */
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290 struct {
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291 type_p p; /* The array component type. */
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292 const char *len; /* The string if any giving its length. */
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293 } a;
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294
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295 /* When TYPE_PARAM_STRUCT for (param_is, use_param, param1_is,
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296 param2_is, ... use_param1, use_param_2, ... use_params) GTY
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297 options. */
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298 struct {
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299 type_p stru; /* The generic GTY-ed type. */
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300 type_p param[NUM_PARAM]; /* The actual parameter types. */
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301 struct fileloc line; /* The source location. */
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302 } param_struct;
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303
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304 } u;
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305 };
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306
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307 /* The one and only TYPE_STRING. */
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308 extern struct type string_type;
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309
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310 /* The two and only TYPE_SCALARs. Their u.scalar_is_char flags are
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311 set early in main. */
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312 extern struct type scalar_nonchar;
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313 extern struct type scalar_char;
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314
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315 /* Test if a type is a union, either a plain one or a language
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316 specific one. */
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317 #define UNION_P(x) \
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318 ((x)->kind == TYPE_UNION || \
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319 ((x)->kind == TYPE_LANG_STRUCT \
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320 && (x)->u.s.lang_struct->kind == TYPE_UNION))
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321
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322 /* Test if a type is a union or a structure, perhaps a language
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323 specific one. */
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324 #define UNION_OR_STRUCT_P(x) \
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diff changeset
325 ((x)->kind == TYPE_UNION \
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326 || (x)->kind == TYPE_STRUCT \
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327 || (x)->kind == TYPE_LANG_STRUCT)
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328
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329
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330
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331 /* Structure representing an output file. */
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332 struct outf
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333 {
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334 struct outf *next;
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335 const char *name;
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336 size_t buflength;
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337 size_t bufused;
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338 char *buf;
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339 };
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340 typedef struct outf *outf_p;
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341
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342 /* The list of output files. */
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343 extern outf_p output_files;
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344
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345 /* The output header file that is included into pretty much every
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346 source file. */
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347 extern outf_p header_file;
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348
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349 /* Print, like fprintf, to O. No-op if O is NULL. */
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350 void
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351 oprintf (outf_p o, const char *S, ...)
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352 ATTRIBUTE_PRINTF_2;
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353
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354 /* An output file, suitable for definitions, that can see declarations
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355 made in INPF and is linked into every language that uses INPF. May
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356 return NULL in plugin mode. The INPF argument is almost const, but
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357 since the result is cached in its inpoutf field it cannot be
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358 declared const. */
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359 outf_p get_output_file_with_visibility (input_file* inpf);
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360
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361 /* The name of an output file, suitable for definitions, that can see
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362 declarations made in INPF and is linked into every language that
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363 uses INPF. May return NULL. */
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364 const char *get_output_file_name (input_file *inpf);
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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365
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366
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367 /* Source directory. */
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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368 extern const char *srcdir; /* (-S) program argument. */
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369
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370 /* Length of srcdir name. */
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371 extern size_t srcdir_len;
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372
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373 /* Variable used for reading and writing the state. */
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374 extern const char *read_state_filename; /* (-r) program argument. */
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375 extern const char *write_state_filename; /* (-w) program argument. */
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376
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377 /* Functions reading and writing the entire gengtype state, called from
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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378 main, and implemented in file gengtype-state.c. */
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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379 void read_state (const char* path);
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380 /* Write the state, and update the state_number field in types. */
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381 void write_state (const char* path);
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382
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383
0
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384 /* Print an error message. */
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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385 extern void error_at_line
67
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386 (const struct fileloc *pos, const char *msg, ...) ATTRIBUTE_PRINTF_2;
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387
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388 /* Like asprintf, but calls fatal() on out of memory. */
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389 extern char *xasprintf (const char *, ...) ATTRIBUTE_PRINTF_1;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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390
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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391 /* Constructor routines for types. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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392 extern void do_typedef (const char *s, type_p t, struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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393 extern void do_scalar_typedef (const char *s, struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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394 extern type_p resolve_typedef (const char *s, struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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395 extern type_p new_structure (const char *name, int isunion,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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396 struct fileloc *pos, pair_p fields,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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397 options_p o);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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398 extern type_p find_structure (const char *s, int isunion);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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399 extern type_p create_scalar_type (const char *name);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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400 extern type_p create_pointer (type_p t);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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401 extern type_p create_array (type_p t, const char *len);
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diff changeset
402 extern pair_p create_field_at (pair_p next, type_p type,
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diff changeset
403 const char *name, options_p opt,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
404 struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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405 extern pair_p nreverse_pairs (pair_p list);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
406 extern type_p adjust_field_type (type_p, options_p);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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407 extern void note_variable (const char *s, type_p t, options_p o,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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408 struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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409 extern void note_def_vec (const char *type_name, bool is_scalar,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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410 struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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411 extern void note_def_vec_alloc (const char *type, const char *astrat,
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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412 struct fileloc *pos);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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413
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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414 /* Lexer and parser routines. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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415 extern int yylex (const char **yylval);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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416 extern void yybegin (const char *fname);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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417 extern void yyend (void);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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418 extern void parse_file (const char *name);
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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419 extern bool hit_error;
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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420
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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421 /* Token codes. */
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diff changeset
422 enum
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
423 {
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
424 EOF_TOKEN = 0,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
425
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
426 /* Per standard convention, codes in the range (0, UCHAR_MAX]
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
427 represent single characters with those character codes. */
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kent <kent@cr.ie.u-ryukyu.ac.jp>
parents:
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428
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
429 CHAR_TOKEN_OFFSET = UCHAR_MAX + 1,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
430 GTY_TOKEN = CHAR_TOKEN_OFFSET,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
431 TYPEDEF,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
432 EXTERN,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
433 STATIC,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
434 UNION,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
435 STRUCT,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
436 ENUM,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
437 VEC_TOKEN,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
438 DEFVEC_OP,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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diff changeset
439 DEFVEC_I,
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
440 DEFVEC_ALLOC,
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441 ELLIPSIS,
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442 PTR_ALIAS,
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443 NESTED_PTR,
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444 PARAM_IS,
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445 NUM,
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446 SCALAR,
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447 ID,
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448 STRING,
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449 CHAR,
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450 ARRAY,
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451
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452 /* print_token assumes that any token >= FIRST_TOKEN_WITH_VALUE may have
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453 a meaningful value to be printed. */
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454 FIRST_TOKEN_WITH_VALUE = PARAM_IS
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455 };
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456
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457
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458 /* Level for verbose messages, e.g. output file generation... */
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459 extern int verbosity_level; /* (-v) program argument. */
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460
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461 /* For debugging purposes we provide two flags. */
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462
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463 /* Dump everything to understand gengtype's state. Might be useful to
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464 gengtype users. */
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465 extern int do_dump; /* (-d) program argument. */
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466
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467 /* Trace the execution by many DBGPRINTF (with the position inside
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468 gengtype source code). Only useful to debug gengtype itself. */
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469 extern int do_debug; /* (-D) program argument. */
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470
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471 #if ENABLE_CHECKING
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472 #define DBGPRINTF(Fmt,...) do {if (do_debug) \
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473 fprintf (stderr, "%s:%d: " Fmt "\n", \
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474 lbasename (__FILE__),__LINE__, ##__VA_ARGS__);} while (0)
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475 void dbgprint_count_type_at (const char *, int, const char *, type_p);
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476 #define DBGPRINT_COUNT_TYPE(Msg,Ty) do {if (do_debug) \
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477 dbgprint_count_type_at (__FILE__, __LINE__, Msg, Ty);}while (0)
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478 #else
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479 #define DBGPRINTF(Fmt,...) do {/*nodbgrintf*/} while (0)
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480 #define DBGPRINT_COUNT_TYPE(Msg,Ty) do{/*nodbgprint_count_type*/}while (0)
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481 #endif /*ENABLE_CHECKING */
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482
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483 #endif