[8833] | 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 |
---|
| 597 | this arg occurrence. */ |
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| 598 | int argno; /* Number of arg to substitute (origin-0) */ |
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| 599 | } *pattern; |
---|
| 600 | union { |
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| 601 | /* Names of macro args, concatenated in reverse order |
---|
| 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 |
---|
| 612 | (including both successful and failing conditionals). */ |
---|
| 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. */ |
---|
| 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 (); |
---|
| 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 (); |
---|
| 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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