Mercurial > hg > CbC > CbC_gcc
annotate gcc/gengtype.h @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 22 Mar 2011 17:18:12 +0900 |
parents | b7f97abdc517 |
children | 04ced10e8804 |
rev | line source |
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0 | 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. |
0 | 4 |
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5 This file is part of GCC. |
0 | 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. |
0 | 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. |
0 | 16 |
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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/>. */ |
0 | 20 |
21 #ifndef GCC_GENGTYPE_H | |
22 #define GCC_GENGTYPE_H | |
23 | |
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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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27 |
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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. |
0 | 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; |
0 | 46 int line; |
47 }; | |
48 | |
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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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53 |
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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 |
0 | 109 /* Data types handed around within, but opaque to, the lexer and parser. */ |
110 typedef struct pair *pair_p; | |
111 typedef struct type *type_p; | |
112 typedef const struct type *const_type_p; | |
113 typedef struct options *options_p; | |
114 | |
115 /* Variables used to communicate between the lexer and the parser. */ | |
116 extern int lexer_toplevel_done; | |
117 extern struct fileloc lexer_line; | |
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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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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365 |
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366 |
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367 /* Source directory. */ |
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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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378 main, and implemented in file gengtype-state.c. */ |
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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 | 384 /* Print an error message. */ |
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385 extern void error_at_line |
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386 (const struct fileloc *pos, const char *msg, ...) ATTRIBUTE_PRINTF_2; |
0 | 387 |
388 /* Like asprintf, but calls fatal() on out of memory. */ | |
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389 extern char *xasprintf (const char *, ...) ATTRIBUTE_PRINTF_1; |
0 | 390 |
391 /* Constructor routines for types. */ | |
392 extern void do_typedef (const char *s, type_p t, struct fileloc *pos); | |
393 extern void do_scalar_typedef (const char *s, struct fileloc *pos); | |
394 extern type_p resolve_typedef (const char *s, struct fileloc *pos); | |
395 extern type_p new_structure (const char *name, int isunion, | |
396 struct fileloc *pos, pair_p fields, | |
397 options_p o); | |
398 extern type_p find_structure (const char *s, int isunion); | |
399 extern type_p create_scalar_type (const char *name); | |
400 extern type_p create_pointer (type_p t); | |
401 extern type_p create_array (type_p t, const char *len); | |
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402 extern pair_p create_field_at (pair_p next, type_p type, |
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403 const char *name, options_p opt, |
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404 struct fileloc *pos); |
0 | 405 extern pair_p nreverse_pairs (pair_p list); |
406 extern type_p adjust_field_type (type_p, options_p); | |
407 extern void note_variable (const char *s, type_p t, options_p o, | |
408 struct fileloc *pos); | |
409 extern void note_def_vec (const char *type_name, bool is_scalar, | |
410 struct fileloc *pos); | |
411 extern void note_def_vec_alloc (const char *type, const char *astrat, | |
412 struct fileloc *pos); | |
413 | |
414 /* Lexer and parser routines. */ | |
415 extern int yylex (const char **yylval); | |
416 extern void yybegin (const char *fname); | |
417 extern void yyend (void); | |
418 extern void parse_file (const char *name); | |
419 extern bool hit_error; | |
420 | |
421 /* Token codes. */ | |
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422 enum |
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423 { |
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424 EOF_TOKEN = 0, |
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425 |
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426 /* Per standard convention, codes in the range (0, UCHAR_MAX] |
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427 represent single characters with those character codes. */ |
0 | 428 |
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429 CHAR_TOKEN_OFFSET = UCHAR_MAX + 1, |
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430 GTY_TOKEN = CHAR_TOKEN_OFFSET, |
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431 TYPEDEF, |
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432 EXTERN, |
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433 STATIC, |
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434 UNION, |
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435 STRUCT, |
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436 ENUM, |
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437 VEC_TOKEN, |
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438 DEFVEC_OP, |
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439 DEFVEC_I, |
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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, |
0 | 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. */ |
0 | 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 |
0 | 483 #endif |