4 * Lexical scanning of configuration files, used by parsers.
12 Copyright (C) 2000-2006 Kern Sibbald
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License
16 version 2 as amended with additional clauses defined in the
17 file LICENSE in the main source directory.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 the file LICENSE for additional details.
29 /* Lex get_char() return values */
36 /* Tokens returned by get_token() */
40 #define T_IDENTIFIER 104
41 #define T_UNQUOTED_STRING 105
42 #define T_QUOTED_STRING 106
43 #define T_BOB 108 /* begin block */
44 #define T_EOB 109 /* end of block */
50 * The following will be returned only if
51 * the appropriate expect flag has been set
53 #define T_SKIP_EOL 113 /* scan through EOLs */
54 #define T_PINT32 114 /* positive integer */
55 #define T_PINT32_RANGE 115 /* positive integer range */
56 #define T_INT32 116 /* integer */
57 #define T_INT64 117 /* 64 bit integer */
58 #define T_NAME 118 /* name max 128 chars */
59 #define T_STRING 119 /* string */
61 #define T_ALL 0 /* no expectations */
75 /* Lex scan options */
76 #define LOPT_NO_IDENT 0x1 /* No Identifiers -- use string */
77 #define LOPT_STRING 0x2 /* Force scan for string */
80 typedef struct s_lex_context {
81 struct s_lex_context *next; /* pointer to next lexical context */
82 int options; /* scan options */
83 char *fname; /* filename */
84 FILE *fd; /* file descriptor */
85 char line[MAXSTRING]; /* input line */
86 char str[MAXSTRING]; /* string being scanned */
87 int str_len; /* length of string */
88 int line_no; /* file line number */
89 int col_no; /* char position on line */
90 int begin_line_no; /* line no of beginning of string */
91 enum lex_state state; /* lex_state variable */
92 int ch; /* last char/L_VAL returned by get_char */
98 void (*scan_error)(const char *file, int line, struct s_lex_context *lc, const char *msg, ...);
99 int err_type; /* message level for scan_error (M_..) */
100 void *caller_ctx; /* caller private data */
103 typedef void (LEX_ERROR_HANDLER)(const char *file, int line, LEX *lc, const char *msg, ...);
105 /* Lexical scanning errors in parsing conf files */
106 #define scan_err0(lc, msg) lc->scan_error(__FILE__, __LINE__, lc, msg)
107 #define scan_err1(lc, msg, a1) lc->scan_error(__FILE__, __LINE__, lc, msg, a1)
108 #define scan_err2(lc, msg, a1, a2) lc->scan_error(__FILE__, __LINE__, lc, msg, a1, a2)
109 #define scan_err3(lc, msg, a1, a2, a3) lc->scan_error(__FILE__, __LINE__, lc, msg, a1, a2, a3)
110 #define scan_err4(lc, msg, a1, a2, a3, a4) lc->scan_error(__FILE__, __LINE__, lc, msg, a1, a2, a3, a4)
111 #define scan_err5(lc, msg, a1, a2, a3, a4, a5) lc->scan_error(__FILE__, __LINE__, lc, msg, a1, a2, a3, a4, a5)
112 #define scan_err6(lc, msg, a1, a2, a3, a4, a5, a6) lc->scan_error(__FILE__, __LINE__, lc, msg, a1, a2, a3, a4, a5, a6)
114 void scan_to_eol(LEX *lc);
115 int scan_to_next_not_eol(LEX * lc);