Mercurial > hg > CbC > CbC_gcc
annotate gcc/gengtype.h @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 84e7813d76e9 |
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rev | line source |
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0 | 1 /* Process source files and output type information. |
145 | 2 Copyright (C) 2002-2020 Free Software Foundation, Inc. |
0 | 3 |
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4 This file is part of GCC. |
0 | 5 |
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6 GCC is free software; you can redistribute it and/or modify it under |
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7 the terms of the GNU General Public License as published by the Free |
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8 Software Foundation; either version 3, or (at your option) any later |
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9 version. |
0 | 10 |
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 for more details. |
0 | 15 |
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16 You should have received a copy of the GNU General Public License |
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17 along with GCC; see the file COPYING3. If not see |
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18 <http://www.gnu.org/licenses/>. */ |
0 | 19 |
20 #ifndef GCC_GENGTYPE_H | |
21 #define GCC_GENGTYPE_H | |
22 | |
111 | 23 #define obstack_chunk_alloc xmalloc |
24 #define obstack_chunk_free free | |
25 #define OBSTACK_CHUNK_SIZE 0 | |
26 | |
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27 /* Sets of accepted source languages like C, C++, Ada... are |
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28 represented by a bitmap. */ |
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29 typedef unsigned lang_bitmap; |
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30 |
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31 /* Variable length structure representing an input file. A hash table |
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32 ensure uniqueness for a given input file name. The only function |
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33 allocating input_file-s is input_file_by_name. */ |
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34 struct input_file_st |
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35 { |
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36 struct outf* inpoutf; /* Cached corresponding output file, computed |
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37 in get_output_file_with_visibility. */ |
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38 lang_bitmap inpbitmap; /* The set of languages using this file. */ |
111 | 39 bool inpisplugin; /* Flag set for plugin input files. */ |
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40 char inpname[1]; /* A variable-length array, ended by a null |
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41 char. */ |
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42 }; |
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43 typedef struct input_file_st input_file; |
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44 |
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45 /* A file position, mostly for error messages. |
0 | 46 The FILE element may be compared using pointer equality. */ |
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47 struct fileloc |
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48 { |
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49 const input_file *file; |
0 | 50 int line; |
51 }; | |
52 | |
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53 |
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54 /* Table of all input files and its size. */ |
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55 extern const input_file** gt_files; |
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56 extern size_t num_gt_files; |
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57 |
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58 /* A number of places use the name of this "gengtype.c" file for a |
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59 location for things that we can't rely on the source to define. We |
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60 also need to refer to the "system.h" file specifically. These two |
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61 pointers are initialized early in main. */ |
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62 extern input_file* this_file; |
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63 extern input_file* system_h_file; |
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64 |
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65 /* Retrieve or create the input_file for a given name, which is a file |
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66 path. This is the only function allocating input_file-s and it is |
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67 hash-consing them. */ |
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68 input_file* input_file_by_name (const char* name); |
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69 |
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70 /* For F an input_file, return the relative path to F from $(srcdir) |
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71 if the latter is a prefix in F, NULL otherwise. */ |
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72 const char *get_file_srcdir_relative_path (const input_file *inpf); |
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73 |
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74 /* Get the name of an input file. */ |
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75 static inline const char* |
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76 get_input_file_name (const input_file *inpf) |
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77 { |
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78 if (inpf) |
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79 return inpf->inpname; |
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80 return NULL; |
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81 } |
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82 |
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83 /* Return a bitmap which has bit `1 << BASE_FILE_<lang>' set iff |
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84 INPUT_FILE is used by <lang>. |
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85 |
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86 This function should be written to assume that a file _is_ used |
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87 if the situation is unclear. If it wrongly assumes a file _is_ used, |
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88 a linker error will result. If it wrongly assumes a file _is not_ used, |
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89 some GC roots may be missed, which is a much harder-to-debug problem. |
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90 */ |
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91 |
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92 static inline lang_bitmap |
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93 get_lang_bitmap (const input_file* inpf) |
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94 { |
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95 if (inpf == NULL) |
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96 return 0; |
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97 return inpf->inpbitmap; |
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98 } |
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99 |
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100 /* Set the bitmap returned by get_lang_bitmap. The only legitimate |
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101 callers of this function are read_input_list & read_state_*. */ |
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102 static inline void |
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103 set_lang_bitmap (input_file* inpf, lang_bitmap n) |
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104 { |
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105 gcc_assert (inpf); |
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106 inpf->inpbitmap = n; |
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107 } |
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108 |
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109 /* Vector of per-language directories. */ |
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110 extern const char **lang_dir_names; |
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111 extern size_t num_lang_dirs; |
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112 |
0 | 113 /* Data types handed around within, but opaque to, the lexer and parser. */ |
114 typedef struct pair *pair_p; | |
115 typedef struct type *type_p; | |
116 typedef const struct type *const_type_p; | |
117 typedef struct options *options_p; | |
118 | |
119 /* Variables used to communicate between the lexer and the parser. */ | |
120 extern int lexer_toplevel_done; | |
121 extern struct fileloc lexer_line; | |
122 | |
67
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123 /* Various things, organized as linked lists, needed both in |
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124 gengtype.c & in gengtype-state.c files. */ |
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125 extern pair_p typedefs; |
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126 extern type_p structures; |
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127 extern pair_p variables; |
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128 |
111 | 129 /* An enum for distinguishing GGC vs PCH. */ |
67
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130 |
111 | 131 enum write_types_kinds |
132 { | |
133 WTK_GGC, | |
134 WTK_PCH, | |
135 | |
136 NUM_WTK | |
137 }; | |
67
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138 |
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139 /* Discrimating kind of types we can understand. */ |
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140 |
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141 enum typekind { |
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142 TYPE_NONE=0, /* Never used, so zeroed memory is invalid. */ |
111 | 143 TYPE_UNDEFINED, /* We have not yet seen a definition for this type. |
144 If a type is still undefined when generating code, | |
145 an error will be generated. */ | |
67
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146 TYPE_SCALAR, /* Scalar types like char. */ |
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147 TYPE_STRING, /* The string type. */ |
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148 TYPE_STRUCT, /* Type for GTY-ed structs. */ |
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149 TYPE_UNION, /* Type for GTY-ed discriminated unions. */ |
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150 TYPE_POINTER, /* Pointer type to GTY-ed type. */ |
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151 TYPE_ARRAY, /* Array of GTY-ed types. */ |
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152 TYPE_LANG_STRUCT, /* GCC front-end language specific structs. |
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153 Various languages may have homonymous but |
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154 different structs. */ |
111 | 155 TYPE_USER_STRUCT /* User defined type. Walkers and markers for |
156 this type are assumed to be provided by the | |
157 user. */ | |
67
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158 }; |
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159 |
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160 /* Discriminating kind for options. */ |
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161 enum option_kind { |
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162 OPTION_NONE=0, /* Never used, so zeroed memory is invalid. */ |
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163 OPTION_STRING, /* A string-valued option. Most options are |
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164 strings. */ |
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165 OPTION_TYPE, /* A type-valued option. */ |
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166 OPTION_NESTED /* Option data for 'nested_ptr'. */ |
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167 }; |
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168 |
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169 |
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170 /* A way to pass data through to the output end. */ |
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171 struct options { |
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172 struct options *next; /* next option of the same pair. */ |
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173 const char *name; /* GTY option name. */ |
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174 enum option_kind kind; /* discriminating option kind. */ |
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175 union { |
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176 const char* string; /* When OPTION_STRING. */ |
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177 type_p type; /* When OPTION_TYPE. */ |
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178 struct nested_ptr_data* nested; /* when OPTION_NESTED. */ |
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179 } info; |
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180 }; |
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181 |
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182 |
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183 /* Option data for the 'nested_ptr' option. */ |
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184 struct nested_ptr_data { |
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185 type_p type; |
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186 const char *convert_to; |
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187 const char *convert_from; |
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188 }; |
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189 |
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190 /* Some functions to create various options structures with name NAME |
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191 and info INFO. NEXT is the next option in the chain. */ |
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192 |
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193 /* Create a string option. */ |
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194 options_p create_string_option (options_p next, const char* name, |
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195 const char* info); |
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196 |
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197 /* Create a type option. */ |
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198 options_p create_type_option (options_p next, const char* name, |
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199 type_p info); |
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200 |
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201 /* Create a nested option. */ |
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202 options_p create_nested_option (options_p next, const char* name, |
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203 struct nested_ptr_data* info); |
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204 |
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205 /* Create a nested pointer option. */ |
145 | 206 options_p create_nested_ptr_option (options_p next, type_p t, |
207 const char *to, const char *from); | |
67
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208 |
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209 /* A name and a type. */ |
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210 struct pair { |
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211 pair_p next; /* The next pair in the linked list. */ |
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212 const char *name; /* The defined name. */ |
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213 type_p type; /* Its GTY-ed type. */ |
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214 struct fileloc line; /* The file location. */ |
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215 options_p opt; /* GTY options, as a linked list. */ |
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216 }; |
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217 |
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218 /* Usage information for GTY-ed types. Gengtype has to care only of |
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219 used GTY-ed types. Types are initially unused, and their usage is |
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220 computed by set_gc_used_type and set_gc_used functions. */ |
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221 |
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222 enum gc_used_enum { |
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223 |
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224 /* We need that zeroed types are initially unused. */ |
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225 GC_UNUSED=0, |
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226 |
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227 /* The GTY-ed type is used, e.g by a GTY-ed variable or a field |
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228 inside a GTY-ed used type. */ |
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229 GC_USED, |
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230 |
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231 /* For GTY-ed structures whose definitions we haven't seen so far |
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232 when we encounter a pointer to it that is annotated with |
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233 ``maybe_undef''. If after reading in everything we don't have |
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234 source file information for it, we assume that it never has been |
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235 defined. */ |
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236 GC_MAYBE_POINTED_TO, |
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237 |
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238 /* For known GTY-ed structures which are pointed to by GTY-ed |
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239 variables or fields. */ |
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240 GC_POINTED_TO |
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241 }; |
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242 |
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243 /* Our type structure describes all types handled by gengtype. */ |
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244 struct type { |
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245 /* Discriminating kind, cannot be TYPE_NONE. */ |
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246 enum typekind kind; |
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247 |
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248 /* For top-level structs or unions, the 'next' field links the |
111 | 249 global list 'structures'; for lang_structs, their homonymous structs are |
250 linked using this 'next' field. The homonymous list starts at the | |
251 s.lang_struct field of the lang_struct. See the new_structure function | |
252 for details. This is tricky! */ | |
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253 type_p next; |
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254 |
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255 /* State number used when writing & reading the persistent state. A |
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256 type with a positive number has already been written. For ease |
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257 of debugging, newly allocated types have a unique negative |
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258 number. */ |
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259 int state_number; |
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260 |
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261 /* Each GTY-ed type which is pointed to by some GTY-ed type knows |
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262 the GTY pointer type pointing to it. See create_pointer |
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263 function. */ |
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264 type_p pointer_to; |
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265 |
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266 /* Type usage information, computed by set_gc_used_type and |
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267 set_gc_used functions. */ |
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268 enum gc_used_enum gc_used; |
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269 |
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270 /* The following union is discriminated by the 'kind' field above. */ |
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271 union { |
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272 /* TYPE__NONE is impossible. */ |
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273 |
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274 /* when TYPE_POINTER: */ |
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275 type_p p; |
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276 |
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277 /* when TYPE_STRUCT or TYPE_UNION or TYPE_LANG_STRUCT, we have an |
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278 aggregate type containing fields: */ |
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279 struct { |
111 | 280 const char *tag; /* the aggregate tag, if any. */ |
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281 struct fileloc line; /* the source location. */ |
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282 pair_p fields; /* the linked list of fields. */ |
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283 options_p opt; /* the GTY options if any. */ |
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284 lang_bitmap bitmap; /* the set of front-end languages |
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285 using that GTY-ed aggregate. */ |
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286 /* For TYPE_LANG_STRUCT, the lang_struct field gives the first |
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287 element of a linked list of homonymous struct or union types. |
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288 Within this list, each homonymous type has as its lang_struct |
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289 field the original TYPE_LANG_STRUCT type. This is a dirty |
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290 trick, see the new_structure function for details. */ |
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291 type_p lang_struct; |
111 | 292 |
293 type_p base_class; /* the parent class, if any. */ | |
294 | |
295 /* The following two fields are not serialized in state files, and | |
296 are instead reconstructed on load. */ | |
297 | |
298 /* The head of a singly-linked list of immediate descendents in | |
299 the inheritance hierarchy. */ | |
300 type_p first_subclass; | |
301 /* The next in that list. */ | |
302 type_p next_sibling_class; | |
303 | |
304 /* Have we already written ggc/pch user func for ptr to this? | |
305 (in write_user_func_for_structure_ptr). */ | |
306 bool wrote_user_func_for_ptr[NUM_WTK]; | |
67
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307 } s; |
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308 |
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309 /* when TYPE_SCALAR: */ |
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310 bool scalar_is_char; |
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311 |
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312 /* when TYPE_ARRAY: */ |
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313 struct { |
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314 type_p p; /* The array component type. */ |
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315 const char *len; /* The string if any giving its length. */ |
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316 } a; |
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317 |
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318 } u; |
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319 }; |
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320 |
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321 /* The one and only TYPE_STRING. */ |
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322 extern struct type string_type; |
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323 |
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324 /* The two and only TYPE_SCALARs. Their u.scalar_is_char flags are |
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325 set early in main. */ |
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326 extern struct type scalar_nonchar; |
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327 extern struct type scalar_char; |
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328 |
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329 /* Test if a type is a union, either a plain one or a language |
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330 specific one. */ |
111 | 331 #define UNION_P(x) \ |
332 ((x)->kind == TYPE_UNION \ | |
333 || ((x)->kind == TYPE_LANG_STRUCT \ | |
334 && (x)->u.s.lang_struct->kind == TYPE_UNION)) | |
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335 |
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336 /* Test if a type is a union or a structure, perhaps a language |
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337 specific one. */ |
111 | 338 static inline bool |
339 union_or_struct_p (enum typekind kind) | |
340 { | |
341 return (kind == TYPE_UNION | |
342 || kind == TYPE_STRUCT | |
343 || kind == TYPE_LANG_STRUCT | |
344 || kind == TYPE_USER_STRUCT); | |
345 } | |
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346 |
111 | 347 static inline bool |
348 union_or_struct_p (const_type_p x) | |
349 { | |
350 return union_or_struct_p (x->kind); | |
351 } | |
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352 |
111 | 353 /* Give the file location of a type, if any. */ |
354 static inline struct fileloc* | |
355 type_fileloc (type_p t) | |
356 { | |
357 if (!t) | |
358 return NULL; | |
359 if (union_or_struct_p (t)) | |
360 return &t->u.s.line; | |
361 return NULL; | |
362 } | |
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363 |
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364 /* Structure representing an output file. */ |
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365 struct outf |
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366 { |
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367 struct outf *next; |
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368 const char *name; |
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369 size_t buflength; |
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370 size_t bufused; |
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371 char *buf; |
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372 }; |
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373 typedef struct outf *outf_p; |
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374 |
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375 /* The list of output files. */ |
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376 extern outf_p output_files; |
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377 |
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378 /* The output header file that is included into pretty much every |
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379 source file. */ |
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380 extern outf_p header_file; |
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381 |
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382 /* Print, like fprintf, to O. No-op if O is NULL. */ |
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383 void |
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384 oprintf (outf_p o, const char *S, ...) |
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385 ATTRIBUTE_PRINTF_2; |
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386 |
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387 /* An output file, suitable for definitions, that can see declarations |
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388 made in INPF and is linked into every language that uses INPF. May |
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389 return NULL in plugin mode. The INPF argument is almost const, but |
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390 since the result is cached in its inpoutf field it cannot be |
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391 declared const. */ |
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392 outf_p get_output_file_with_visibility (input_file* inpf); |
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393 |
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394 /* The name of an output file, suitable for definitions, that can see |
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395 declarations made in INPF and is linked into every language that |
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396 uses INPF. May return NULL. */ |
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397 const char *get_output_file_name (input_file *inpf); |
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398 |
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399 |
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400 /* Source directory. */ |
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401 extern const char *srcdir; /* (-S) program argument. */ |
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402 |
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403 /* Length of srcdir name. */ |
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404 extern size_t srcdir_len; |
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405 |
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406 /* Variable used for reading and writing the state. */ |
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407 extern const char *read_state_filename; /* (-r) program argument. */ |
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408 extern const char *write_state_filename; /* (-w) program argument. */ |
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409 |
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410 /* Functions reading and writing the entire gengtype state, called from |
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411 main, and implemented in file gengtype-state.c. */ |
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412 void read_state (const char* path); |
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413 /* Write the state, and update the state_number field in types. */ |
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414 void write_state (const char* path); |
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415 |
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416 |
0 | 417 /* Print an error message. */ |
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418 extern void error_at_line |
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419 (const struct fileloc *pos, const char *msg, ...) ATTRIBUTE_PRINTF_2; |
0 | 420 |
421 /* Constructor routines for types. */ | |
422 extern void do_typedef (const char *s, type_p t, struct fileloc *pos); | |
423 extern void do_scalar_typedef (const char *s, struct fileloc *pos); | |
424 extern type_p resolve_typedef (const char *s, struct fileloc *pos); | |
111 | 425 extern void add_subclass (type_p base, type_p subclass); |
426 extern type_p new_structure (const char *name, enum typekind kind, | |
0 | 427 struct fileloc *pos, pair_p fields, |
111 | 428 options_p o, type_p base); |
429 type_p create_user_defined_type (const char *, struct fileloc *); | |
430 extern type_p find_structure (const char *s, enum typekind kind); | |
0 | 431 extern type_p create_scalar_type (const char *name); |
432 extern type_p create_pointer (type_p t); | |
433 extern type_p create_array (type_p t, const char *len); | |
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434 extern pair_p create_field_at (pair_p next, type_p type, |
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435 const char *name, options_p opt, |
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436 struct fileloc *pos); |
0 | 437 extern pair_p nreverse_pairs (pair_p list); |
438 extern type_p adjust_field_type (type_p, options_p); | |
439 extern void note_variable (const char *s, type_p t, options_p o, | |
440 struct fileloc *pos); | |
441 | |
442 /* Lexer and parser routines. */ | |
443 extern int yylex (const char **yylval); | |
444 extern void yybegin (const char *fname); | |
445 extern void yyend (void); | |
446 extern void parse_file (const char *name); | |
447 extern bool hit_error; | |
448 | |
449 /* Token codes. */ | |
111 | 450 enum gty_token |
451 { | |
452 EOF_TOKEN = 0, | |
0 | 453 |
111 | 454 /* Per standard convention, codes in the range (0, UCHAR_MAX] |
455 represent single characters with those character codes. */ | |
456 CHAR_TOKEN_OFFSET = UCHAR_MAX + 1, | |
457 GTY_TOKEN = CHAR_TOKEN_OFFSET, | |
458 TYPEDEF, | |
459 EXTERN, | |
460 STATIC, | |
461 UNION, | |
462 STRUCT, | |
463 ENUM, | |
464 ELLIPSIS, | |
465 PTR_ALIAS, | |
466 NESTED_PTR, | |
467 USER_GTY, | |
468 NUM, | |
469 SCALAR, | |
470 ID, | |
471 STRING, | |
472 CHAR, | |
473 ARRAY, | |
474 IGNORABLE_CXX_KEYWORD, | |
0 | 475 |
111 | 476 /* print_token assumes that any token >= FIRST_TOKEN_WITH_VALUE may have |
477 a meaningful value to be printed. */ | |
478 FIRST_TOKEN_WITH_VALUE = USER_GTY | |
479 }; | |
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480 |
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481 |
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482 /* Level for verbose messages, e.g. output file generation... */ |
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483 extern int verbosity_level; /* (-v) program argument. */ |
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484 |
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485 /* For debugging purposes we provide two flags. */ |
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486 |
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487 /* Dump everything to understand gengtype's state. Might be useful to |
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488 gengtype users. */ |
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489 extern int do_dump; /* (-d) program argument. */ |
0 | 490 |
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491 /* Trace the execution by many DBGPRINTF (with the position inside |
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492 gengtype source code). Only useful to debug gengtype itself. */ |
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493 extern int do_debug; /* (-D) program argument. */ |
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494 |
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495 #define DBGPRINTF(Fmt,...) do {if (do_debug) \ |
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496 fprintf (stderr, "%s:%d: " Fmt "\n", \ |
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497 lbasename (__FILE__),__LINE__, ##__VA_ARGS__);} while (0) |
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498 void dbgprint_count_type_at (const char *, int, const char *, type_p); |
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499 #define DBGPRINT_COUNT_TYPE(Msg,Ty) do {if (do_debug) \ |
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500 dbgprint_count_type_at (__FILE__, __LINE__, Msg, Ty);}while (0) |
111 | 501 |
502 #define FOR_ALL_INHERITED_FIELDS(TYPE, FIELD_VAR) \ | |
503 for (type_p sub = (TYPE); sub; sub = sub->u.s.base_class) \ | |
504 for (FIELD_VAR = sub->u.s.fields; FIELD_VAR; FIELD_VAR = FIELD_VAR->next) | |
505 | |
506 extern bool | |
507 opts_have (options_p opts, const char *str); | |
508 | |
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509 |
0 | 510 #endif |