1 | /* Definitions for CPP library. |
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2 | Copyright (C) 1995 Free Software Foundation, Inc. |
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3 | Written by Per Bothner, 1994-95. |
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4 | |
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5 | This program is free software; you can redistribute it and/or modify it |
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6 | under the terms of the GNU General Public License as published by the |
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7 | Free Software Foundation; either version 2, or (at your option) any |
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8 | later version. |
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9 | |
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10 | This program is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | GNU General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU General Public License |
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16 | along with this program; if not, write to the Free Software |
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17 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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18 | |
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19 | In other words, you are welcome to use, share and improve this program. |
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20 | You are forbidden to forbid anyone else to use, share and improve |
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21 | what you give them. Help stamp out software-hoarding! */ |
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22 | |
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23 | #include <sys/types.h> |
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24 | #include <sys/stat.h> |
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25 | |
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26 | #ifdef __cplusplus |
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27 | extern "C" { |
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28 | #endif |
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29 | |
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30 | #define STATIC_BUFFERS |
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31 | |
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32 | typedef unsigned char U_CHAR; |
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33 | |
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34 | struct parse_file; |
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35 | typedef struct cpp_reader cpp_reader; |
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36 | typedef struct cpp_buffer cpp_buffer; |
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37 | typedef struct cpp_options cpp_options; |
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38 | typedef struct hashnode cpp_hashnode; |
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39 | |
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40 | enum cpp_token { |
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41 | CPP_EOF = -1, |
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42 | CPP_OTHER = 0, |
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43 | CPP_COMMENT = 1, |
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44 | CPP_HSPACE, |
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45 | CPP_VSPACE, /* newlines and #line directives */ |
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46 | CPP_NAME, |
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47 | CPP_NUMBER, |
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48 | CPP_CHAR, |
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49 | CPP_STRING, |
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50 | CPP_DIRECTIVE, |
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51 | CPP_LPAREN, /* "(" */ |
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52 | CPP_RPAREN, /* ")" */ |
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53 | CPP_LBRACE, /* "{" */ |
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54 | CPP_RBRACE, /* "}" */ |
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55 | CPP_COMMA, /* "," */ |
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56 | CPP_SEMICOLON,/* ";" */ |
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57 | CPP_3DOTS, /* "..." */ |
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58 | #if 0 |
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59 | CPP_ANDAND, /* "&&" */ |
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60 | CPP_OROR, /* "||" */ |
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61 | CPP_LSH, /* "<<" */ |
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62 | CPP_RSH, /* ">>" */ |
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63 | CPP_EQL, /* "==" */ |
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64 | CPP_NEQ, /* "!=" */ |
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65 | CPP_LEQ, /* "<=" */ |
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66 | CPP_GEQ, /* ">=" */ |
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67 | CPP_PLPL, /* "++" */ |
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68 | CPP_MINMIN, /* "--" */ |
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69 | #endif |
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70 | /* POP_TOKEN is returned when we've popped a cpp_buffer. */ |
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71 | CPP_POP |
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72 | }; |
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73 | |
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74 | #ifndef PARAMS |
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75 | #ifdef __STDC |
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76 | #define PARAMS(P) P |
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77 | #else |
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78 | #define PARAMS(P) () |
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79 | #endif |
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80 | #endif /* !PARAMS */ |
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81 | |
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82 | typedef enum cpp_token (*parse_underflow_t) PARAMS((cpp_reader*)); |
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83 | typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader*)); |
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84 | |
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85 | /* A parse_marker indicates a previous position, |
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86 | which we can backtrack to. */ |
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87 | |
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88 | struct parse_marker { |
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89 | cpp_buffer *buf; |
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90 | struct parse_marker *next; |
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91 | int position; |
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92 | }; |
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93 | |
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94 | extern void parse_set_mark PARAMS ((struct parse_marker*, cpp_reader*)); |
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95 | extern void parse_clear_mark PARAMS ((struct parse_marker*)); |
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96 | extern void parse_goto_mark PARAMS((struct parse_marker*, cpp_reader*)); |
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97 | extern void parse_move_mark PARAMS((struct parse_marker*, cpp_reader*)); |
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98 | |
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99 | extern int cpp_handle_options PARAMS ((cpp_reader*, int, char**)); |
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100 | extern enum cpp_token cpp_get_token PARAMS ((struct parse_marker*)); |
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101 | extern void cpp_skip_hspace PARAMS((cpp_reader*)); |
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102 | extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *)); |
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103 | |
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104 | |
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105 | /* Maintain and search list of included files, for #import. */ |
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106 | |
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107 | #define IMPORT_HASH_SIZE 31 |
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108 | |
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109 | struct import_file { |
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110 | char *name; |
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111 | ino_t inode; |
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112 | dev_t dev; |
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113 | struct import_file *next; |
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114 | }; |
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115 | |
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116 | /* If we have a huge buffer, may need to cache more recent counts */ |
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117 | #define CPP_LINE_BASE(BUF) ((BUF)->buf + (BUF)->line_base) |
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118 | |
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119 | struct cpp_buffer { |
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120 | unsigned char *buf; |
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121 | unsigned char *cur; |
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122 | unsigned char *rlimit; /* end of valid data */ |
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123 | unsigned char *alimit; /* end of allocated buffer */ |
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124 | unsigned char *prev; /* start of current token */ |
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125 | |
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126 | char *fname; |
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127 | /* Filename specified with #line command. */ |
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128 | char *nominal_fname; |
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129 | |
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130 | /* Record where in the search path this file was found. |
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131 | For #include_next. */ |
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132 | struct file_name_list *dir; |
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133 | |
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134 | long line_base; |
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135 | long lineno; /* Line number at CPP_LINE_BASE. */ |
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136 | long colno; /* Column number at CPP_LINE_BASE. */ |
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137 | #ifndef STATIC_BUFFERS |
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138 | cpp_buffer *chain; |
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139 | #endif |
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140 | parse_underflow_t underflow; |
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141 | parse_cleanup_t cleanup; |
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142 | void *data; |
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143 | struct parse_marker *marks; |
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144 | /* Value of if_stack at start of this file. |
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145 | Used to prohibit unmatched #endif (etc) in an include file. */ |
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146 | struct if_stack *if_stack; |
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147 | |
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148 | /* True if this is a header file included using <FILENAME>. */ |
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149 | char system_header_p; |
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150 | char seen_eof; |
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151 | |
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152 | /* True if buffer contains escape sequences. |
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153 | Currently there are are only two kind: |
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154 | "@-" means following identifier should not be macro-expanded. |
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155 | "@ " means a token-separator. This turns into " " in final output |
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156 | if not stringizing and needed to separate tokens; otherwise nothing. |
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157 | "@@" means a normal '@'. |
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158 | (An '@' inside a string stands for itself and is never an escape.) */ |
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159 | char has_escapes; |
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160 | }; |
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161 | |
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162 | struct cpp_pending; /* Forward declaration - for C++. */ |
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163 | struct file_name_map_list; |
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164 | |
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165 | typedef struct assertion_hashnode ASSERTION_HASHNODE; |
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166 | #define ASSERTION_HASHSIZE 37 |
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167 | |
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168 | #ifdef STATIC_BUFFERS |
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169 | /* Maximum nesting of cpp_buffers. We use a static limit, partly for |
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170 | efficiency, and partly to limit runaway recursion. */ |
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171 | #define CPP_STACK_MAX 200 |
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172 | #endif |
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173 | |
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174 | struct cpp_reader { |
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175 | unsigned char *limit; |
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176 | parse_underflow_t get_token; |
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177 | cpp_buffer *buffer; |
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178 | #ifdef STATIC_BUFFERS |
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179 | cpp_buffer buffer_stack[CPP_STACK_MAX]; |
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180 | #endif |
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181 | |
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182 | int errors; /* Error counter for exit code */ |
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183 | void *data; |
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184 | |
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185 | U_CHAR *token_buffer; |
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186 | int token_buffer_size; |
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187 | |
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188 | /* Line where a newline was first seen in a string constant. */ |
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189 | int multiline_string_line; |
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190 | |
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191 | /* Current depth in #include directives that use <...>. */ |
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192 | int system_include_depth; |
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193 | |
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194 | /* List of included files that contained #pragma once. */ |
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195 | struct file_name_list *dont_repeat_files; |
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196 | |
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197 | /* List of other included files. |
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198 | If ->control_macro if nonzero, the file had a #ifndef |
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199 | around the entire contents, and ->control_macro gives the macro name. */ |
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200 | struct file_name_list *all_include_files; |
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201 | |
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202 | /* Current maximum length of directory names in the search path |
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203 | for include files. (Altered as we get more of them.) */ |
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204 | int max_include_len; |
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205 | |
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206 | /* Hash table of files already included with #include or #import. */ |
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207 | struct import_file *import_hash_table[IMPORT_HASH_SIZE]; |
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208 | |
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209 | struct if_stack *if_stack; |
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210 | |
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211 | /* Nonzero means we are inside an IF during a -pcp run. In this mode |
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212 | macro expansion is done, and preconditions are output for all macro |
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213 | uses requiring them. */ |
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214 | char pcp_inside_if; |
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215 | |
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216 | /* Nonzero means we have printed (while error reporting) a list of |
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217 | containing files that matches the current status. */ |
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218 | char input_stack_listing_current; |
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219 | |
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220 | /* If non-zero, macros are not expanded. */ |
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221 | char no_macro_expand; |
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222 | |
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223 | /* Print column number in error messages. */ |
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224 | char show_column; |
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225 | |
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226 | /* We're printed a warning recommending against using #import. */ |
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227 | char import_warning; |
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228 | |
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229 | /* If true, character between '<' and '>' are a single (string) token. */ |
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230 | char parsing_include_directive; |
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231 | |
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232 | /* True if escape sequences (as described for has_escapes in |
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233 | parse_buffer) should be emitted. */ |
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234 | char output_escapes; |
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235 | |
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236 | /* 0: Have seen non-white-space on this line. |
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237 | 1: Only seen white space so far on this line. |
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238 | 2: Only seen white space so far in this file. */ |
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239 | char only_seen_white; |
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240 | |
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241 | /* Nonzero means this file was included with a -imacros or -include |
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242 | command line and should not be recorded as an include file. */ |
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243 | |
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244 | int no_record_file; |
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245 | |
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246 | long lineno; |
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247 | |
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248 | struct tm *timebuf; |
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249 | |
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250 | ASSERTION_HASHNODE *assertion_hashtab[ASSERTION_HASHSIZE]; |
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251 | |
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252 | /* Buffer of -M output. */ |
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253 | char *deps_buffer; |
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254 | |
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255 | /* Number of bytes allocated in above. */ |
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256 | int deps_allocated_size; |
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257 | |
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258 | /* Number of bytes used. */ |
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259 | int deps_size; |
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260 | |
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261 | /* Number of bytes since the last newline. */ |
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262 | int deps_column; |
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263 | }; |
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264 | |
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265 | #define CPP_BUF_PEEK(BUFFER) \ |
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266 | ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF) |
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267 | #define CPP_BUF_GET(BUFFER) \ |
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268 | ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur++ : EOF) |
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269 | #define CPP_FORWARD(BUFFER, N) ((BUFFER)->cur += (N)) |
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270 | |
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271 | /* Number of characters currently in PFILE's output buffer. */ |
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272 | #define CPP_WRITTEN(PFILE) ((PFILE)->limit - (PFILE)->token_buffer) |
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273 | #define CPP_PWRITTEN(PFILE) ((PFILE)->limit) |
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274 | |
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275 | /* Make sure PFILE->token_buffer has space for at least N more characters. */ |
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276 | #define CPP_RESERVE(PFILE, N) \ |
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277 | (CPP_WRITTEN (PFILE) + N > (PFILE)->token_buffer_size \ |
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278 | && (cpp_grow_buffer (PFILE, N), 0)) |
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279 | |
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280 | /* Append string STR (of length N) to PFILE's output buffer. |
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281 | Assume there is enough space. */ |
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282 | #define CPP_PUTS_Q(PFILE, STR, N) \ |
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283 | (bcopy (STR, (PFILE)->limit, (N)), (PFILE)->limit += (N)) |
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284 | /* Append string STR (of length N) to PFILE's output buffer. Make space. */ |
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285 | #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N) |
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286 | /* Append character CH to PFILE's output buffer. Assume sufficient space. */ |
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287 | #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH)) |
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288 | /* Append character CH to PFILE's output buffer. Make space if need be. */ |
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289 | #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH)) |
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290 | /* Make sure PFILE->limit is followed by '\0'. */ |
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291 | #define CPP_NUL_TERMINATE_Q(PFILE) (*(PFILE)->limit = 0) |
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292 | #define CPP_NUL_TERMINATE(PFILE) (CPP_RESERVE(PFILE, 1), *(PFILE)->limit = 0) |
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293 | #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA)) |
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294 | #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N)) |
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295 | |
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296 | #define CPP_OPTIONS(PFILE) ((cpp_options*)(PFILE)->data) |
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297 | #define CPP_BUFFER(PFILE) ((PFILE)->buffer) |
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298 | #ifdef STATIC_BUFFERS |
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299 | #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)+1) |
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300 | #define CPP_NULL_BUFFER(PFILE) (&(PFILE)->buffer_stack[CPP_STACK_MAX]) |
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301 | #else |
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302 | #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->chain) |
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303 | #define CPP_NULL_BUFFER(PFILE) ((cpp_buffer*)0) |
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304 | #endif |
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305 | |
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306 | /* Pointed to by parse_file::data. */ |
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307 | struct cpp_options { |
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308 | char *in_fname; |
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309 | |
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310 | /* Name of output file, for error messages. */ |
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311 | char *out_fname; |
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312 | |
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313 | struct file_name_map_list *map_list; |
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314 | |
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315 | /* Non-0 means -v, so print the full set of include dirs. */ |
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316 | char verbose; |
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317 | |
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318 | /* Nonzero means use extra default include directories for C++. */ |
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319 | |
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320 | char cplusplus; |
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321 | |
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322 | /* Nonzero means handle cplusplus style comments */ |
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323 | |
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324 | char cplusplus_comments; |
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325 | |
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326 | /* Nonzero means handle #import, for objective C. */ |
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327 | |
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328 | char objc; |
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329 | |
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330 | /* Nonzero means this is an assembly file, and allow |
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331 | unknown directives, which could be comments. */ |
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332 | |
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333 | int lang_asm; |
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334 | |
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335 | /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */ |
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336 | |
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337 | char for_lint; |
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338 | |
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339 | /* Nonzero means handle CHILL comment syntax |
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340 | and output CHILL string delimiter for __DATE___ etc. */ |
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341 | |
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342 | char chill; |
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343 | |
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344 | /* Nonzero means copy comments into the output file. */ |
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345 | |
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346 | char put_out_comments; |
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347 | |
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348 | /* Nonzero means don't process the ANSI trigraph sequences. */ |
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349 | |
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350 | char no_trigraphs; |
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351 | |
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352 | /* Nonzero means print the names of included files rather than |
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353 | the preprocessed output. 1 means just the #include "...", |
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354 | 2 means #include <...> as well. */ |
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355 | |
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356 | char print_deps; |
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357 | |
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358 | /* Nonzero if missing .h files in -M output are assumed to be generated |
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359 | files and not errors. */ |
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360 | |
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361 | char print_deps_missing_files; |
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362 | |
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363 | /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */ |
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364 | char print_deps_append; |
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365 | |
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366 | /* Nonzero means print names of header files (-H). */ |
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367 | |
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368 | char print_include_names; |
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369 | |
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370 | /* Nonzero means try to make failure to fit ANSI C an error. */ |
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371 | |
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372 | char pedantic_errors; |
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373 | |
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374 | /* Nonzero means don't print warning messages. -w. */ |
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375 | |
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376 | char inhibit_warnings; |
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377 | |
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378 | /* Nonzero means warn if slash-star appears in a comment. */ |
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379 | |
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380 | char warn_comments; |
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381 | |
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382 | /* Nonzero means warn if there are any trigraphs. */ |
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383 | |
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384 | char warn_trigraphs; |
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385 | |
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386 | /* Nonzero means warn if #import is used. */ |
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387 | |
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388 | char warn_import; |
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389 | |
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390 | /* Nonzero means warn if a macro argument is (or would be) |
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391 | stringified with -traditional. */ |
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392 | |
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393 | char warn_stringify; |
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394 | |
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395 | /* Nonzero means turn warnings into errors. */ |
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396 | |
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397 | char warnings_are_errors; |
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398 | |
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399 | /* Nonzero causes output not to be done, |
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400 | but directives such as #define that have side effects |
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401 | are still obeyed. */ |
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402 | |
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403 | char no_output; |
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404 | |
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405 | /* Nonzero means don't output line number information. */ |
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406 | |
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407 | char no_line_commands; |
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408 | |
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409 | /* Nonzero means output the text in failing conditionals, |
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410 | inside #failed ... #endfailed. */ |
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411 | |
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412 | char output_conditionals; |
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413 | |
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414 | /* Nonzero means -I- has been seen, |
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415 | so don't look for #include "foo" the source-file directory. */ |
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416 | char ignore_srcdir; |
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417 | |
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418 | /* Zero means dollar signs are punctuation. |
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419 | -$ stores 0; -traditional may store 1. Default is 1 for VMS, 0 otherwise. |
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420 | This must be 0 for correct processing of this ANSI C program: |
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421 | #define foo(a) #a |
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422 | #define lose(b) foo (b) |
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423 | #define test$ |
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424 | lose (test) */ |
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425 | char dollars_in_ident; |
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426 | #ifndef DOLLARS_IN_IDENTIFIERS |
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427 | #define DOLLARS_IN_IDENTIFIERS 1 |
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428 | #endif |
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429 | |
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430 | /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */ |
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431 | char traditional; |
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432 | |
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433 | /* Nonzero means give all the error messages the ANSI standard requires. */ |
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434 | char pedantic; |
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435 | |
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436 | char done_initializing; |
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437 | |
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438 | struct file_name_list *include; /* First dir to search */ |
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439 | /* First dir to search for <file> */ |
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440 | /* This is the first element to use for #include <...>. |
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441 | If it is 0, use the entire chain for such includes. */ |
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442 | struct file_name_list *first_bracket_include; |
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443 | /* This is the first element in the chain that corresponds to |
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444 | a directory of system header files. */ |
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445 | struct file_name_list *first_system_include; |
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446 | struct file_name_list *last_include; /* Last in chain */ |
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447 | |
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448 | /* Chain of include directories to put at the end of the other chain. */ |
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449 | struct file_name_list *after_include; |
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450 | struct file_name_list *last_after_include; /* Last in chain */ |
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451 | |
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452 | /* Chain to put at the start of the system include files. */ |
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453 | struct file_name_list *before_system; |
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454 | struct file_name_list *last_before_system; /* Last in chain */ |
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455 | |
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456 | /* Directory prefix that should replace `/usr' in the standard |
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457 | include file directories. */ |
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458 | char *include_prefix; |
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459 | |
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460 | char inhibit_predefs; |
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461 | char no_standard_includes; |
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462 | char no_standard_cplusplus_includes; |
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463 | |
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464 | /* dump_only means inhibit output of the preprocessed text |
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465 | and instead output the definitions of all user-defined |
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466 | macros in a form suitable for use as input to cccp. |
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467 | dump_names means pass #define and the macro name through to output. |
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468 | dump_definitions means pass the whole definition (plus #define) through |
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469 | */ |
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470 | |
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471 | enum {dump_none = 0, dump_only, dump_names, dump_definitions} |
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472 | dump_macros; |
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473 | |
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474 | /* Nonzero means pass all #define and #undef directives which we actually |
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475 | process through to the output stream. This feature is used primarily |
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476 | to allow cc1 to record the #defines and #undefs for the sake of |
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477 | debuggers which understand about preprocessor macros, but it may |
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478 | also be useful with -E to figure out how symbols are defined, and |
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479 | where they are defined. */ |
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480 | int debug_output; |
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481 | |
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482 | /* Pending -D, -U and -A options, in reverse order. */ |
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483 | struct cpp_pending *pending; |
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484 | |
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485 | /* File name which deps are being written to. |
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486 | This is 0 if deps are being written to stdout. */ |
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487 | char *deps_file; |
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488 | |
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489 | /* Target-name to write with the dependency information. */ |
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490 | char *deps_target; |
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491 | }; |
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492 | |
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493 | #define CPP_TRADITIONAL(PFILE) (CPP_OPTIONS(PFILE)-> traditional) |
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494 | #define CPP_PEDANTIC(PFILE) (CPP_OPTIONS (PFILE)->pedantic) |
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495 | #define CPP_PRINT_DEPS(PFILE) (CPP_OPTIONS (PFILE)->print_deps) |
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496 | |
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497 | /* Name under which this program was invoked. */ |
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498 | |
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499 | extern char *progname; |
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500 | |
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501 | /* The structure of a node in the hash table. The hash table |
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502 | has entries for all tokens defined by #define commands (type T_MACRO), |
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503 | plus some special tokens like __LINE__ (these each have their own |
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504 | type, and the appropriate code is run when that type of node is seen. |
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505 | It does not contain control words like "#define", which are recognized |
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506 | by a separate piece of code. */ |
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507 | |
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508 | /* different flavors of hash nodes --- also used in keyword table */ |
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509 | enum node_type { |
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510 | T_DEFINE = 1, /* the `#define' keyword */ |
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511 | T_INCLUDE, /* the `#include' keyword */ |
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512 | T_INCLUDE_NEXT, /* the `#include_next' keyword */ |
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513 | T_IMPORT, /* the `#import' keyword */ |
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514 | T_IFDEF, /* the `#ifdef' keyword */ |
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515 | T_IFNDEF, /* the `#ifndef' keyword */ |
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516 | T_IF, /* the `#if' keyword */ |
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517 | T_ELSE, /* `#else' */ |
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518 | T_PRAGMA, /* `#pragma' */ |
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519 | T_ELIF, /* `#elif' */ |
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520 | T_UNDEF, /* `#undef' */ |
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521 | T_LINE, /* `#line' */ |
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522 | T_ERROR, /* `#error' */ |
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523 | T_WARNING, /* `#warning' */ |
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524 | T_ENDIF, /* `#endif' */ |
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525 | T_SCCS, /* `#sccs', used on system V. */ |
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526 | T_IDENT, /* `#ident', used on system V. */ |
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527 | T_ASSERT, /* `#assert', taken from system V. */ |
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528 | T_UNASSERT, /* `#unassert', taken from system V. */ |
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529 | T_SPECLINE, /* special symbol `__LINE__' */ |
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530 | T_DATE, /* `__DATE__' */ |
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531 | T_FILE, /* `__FILE__' */ |
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532 | T_BASE_FILE, /* `__BASE_FILE__' */ |
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533 | T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */ |
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534 | T_VERSION, /* `__VERSION__' */ |
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535 | T_SIZE_TYPE, /* `__SIZE_TYPE__' */ |
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536 | T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */ |
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537 | T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */ |
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538 | T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */ |
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539 | T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */ |
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540 | T_TIME, /* `__TIME__' */ |
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541 | T_CONST, /* Constant value, used by `__STDC__' */ |
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542 | T_MACRO, /* macro defined by `#define' */ |
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543 | T_DISABLED, /* macro temporarily turned off for rescan */ |
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544 | T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */ |
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545 | T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */ |
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546 | T_UNUSED /* Used for something not defined. */ |
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547 | }; |
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548 | |
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549 | /* Structure returned by create_definition */ |
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550 | typedef struct macrodef MACRODEF; |
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551 | struct macrodef |
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552 | { |
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553 | struct definition *defn; |
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554 | U_CHAR *symnam; |
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555 | int symlen; |
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556 | }; |
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557 | |
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558 | /* Structure allocated for every #define. For a simple replacement |
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559 | such as |
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560 | #define foo bar , |
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561 | nargs = -1, the `pattern' list is null, and the expansion is just |
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562 | the replacement text. Nargs = 0 means a functionlike macro with no args, |
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563 | e.g., |
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564 | #define getchar() getc (stdin) . |
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565 | When there are args, the expansion is the replacement text with the |
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566 | args squashed out, and the reflist is a list describing how to |
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567 | build the output from the input: e.g., "3 chars, then the 1st arg, |
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568 | then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg". |
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569 | The chars here come from the expansion. Whatever is left of the |
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570 | expansion after the last arg-occurrence is copied after that arg. |
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571 | Note that the reflist can be arbitrarily long--- |
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572 | its length depends on the number of times the arguments appear in |
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573 | the replacement text, not how many args there are. Example: |
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574 | #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and |
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575 | pattern list |
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576 | { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL } |
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577 | where (x, y) means (nchars, argno). */ |
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578 | |
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579 | typedef struct definition DEFINITION; |
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580 | struct definition { |
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581 | int nargs; |
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582 | int length; /* length of expansion string */ |
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583 | int predefined; /* True if the macro was builtin or */ |
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584 | /* came from the command line */ |
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585 | U_CHAR *expansion; |
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586 | int line; /* Line number of definition */ |
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587 | char *file; /* File of definition */ |
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588 | char rest_args; /* Nonzero if last arg. absorbs the rest */ |
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589 | struct reflist { |
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590 | struct reflist *next; |
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591 | char stringify; /* nonzero if this arg was preceded by a |
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592 | # operator. */ |
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593 | char raw_before; /* Nonzero if a ## operator before arg. */ |
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594 | char raw_after; /* Nonzero if a ## operator after arg. */ |
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595 | char rest_args; /* Nonzero if this arg. absorbs the rest */ |
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596 | int nchars; /* Number of literal chars to copy before |
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597 | this arg occurrence. */ |
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598 | int argno; /* Number of arg to substitute (origin-0) */ |
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599 | } *pattern; |
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600 | union { |
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601 | /* Names of macro args, concatenated in reverse order |
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602 | with comma-space between them. |
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603 | The only use of this is that we warn on redefinition |
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604 | if this differs between the old and new definitions. */ |
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605 | U_CHAR *argnames; |
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606 | } args; |
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607 | }; |
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608 | |
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609 | extern U_CHAR is_idchar[256]; |
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610 | |
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611 | /* Stack of conditionals currently in progress |
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612 | (including both successful and failing conditionals). */ |
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613 | |
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614 | struct if_stack { |
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615 | struct if_stack *next; /* for chaining to the next stack frame */ |
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616 | char *fname; /* copied from input when frame is made */ |
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617 | int lineno; /* similarly */ |
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618 | int if_succeeded; /* true if a leg of this if-group |
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619 | has been passed through rescan */ |
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620 | U_CHAR *control_macro; /* For #ifndef at start of file, |
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621 | this is the macro name tested. */ |
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622 | enum node_type type; /* type of last directive seen in this group */ |
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623 | }; |
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624 | typedef struct if_stack IF_STACK_FRAME; |
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625 | |
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626 | extern void cpp_buf_line_and_col PARAMS((cpp_buffer*, long*, long*)); |
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627 | extern cpp_buffer* cpp_file_buffer PARAMS((cpp_reader*)); |
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628 | extern void cpp_define PARAMS ((cpp_reader*, U_CHAR*)); |
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629 | |
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630 | extern void cpp_error (); |
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631 | extern void cpp_warning (); |
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632 | extern void cpp_pedwarn (); |
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633 | extern void cpp_error_with_line (); |
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634 | extern void cpp_pedwarn_with_line (); |
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635 | extern void cpp_pedwarn_with_file_and_line (); |
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636 | extern void fatal (); |
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637 | extern void cpp_error_from_errno (); |
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638 | extern void cpp_perror_with_name (); |
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639 | extern void cpp_pfatal_with_name (); |
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640 | |
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641 | extern void cpp_grow_buffer PARAMS ((cpp_reader*, long)); |
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642 | extern int cpp_parse_escape PARAMS ((cpp_reader*, char**)); |
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643 | extern cpp_buffer* cpp_push_buffer PARAMS ((cpp_reader *, U_CHAR*, long)); |
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644 | extern cpp_buffer* cpp_pop_buffer PARAMS ((cpp_reader *)); |
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645 | |
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646 | extern cpp_hashnode* cpp_lookup PARAMS ((cpp_reader*, const U_CHAR*, |
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647 | int, int)); |
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648 | |
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649 | #ifdef __cplusplus |
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650 | } |
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651 | #endif |
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