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1 | /* Copyright (C) 1996, 1997 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19bc17a9 RM |
19 | |
20 | #ifndef _LINEREADER_H | |
21 | #define _LINEREADER_H 1 | |
22 | ||
23 | #include <ctype.h> | |
24 | #include <libintl.h> | |
25 | #include <stdio.h> | |
26 | ||
27 | #include "error.h" | |
28 | #include "locfile-token.h" | |
29 | ||
30 | ||
31 | typedef const struct keyword_t *(*kw_hash_fct_t) (const char *, int); | |
32 | struct charset_t; | |
33 | ||
34 | ||
35 | struct token | |
36 | { | |
37 | enum token_t tok; | |
38 | union | |
39 | { | |
40 | struct | |
41 | { | |
42 | char *start; | |
43 | size_t len; | |
44 | } str; | |
45 | unsigned long int num; | |
46 | struct | |
47 | { | |
48 | unsigned int val; | |
49 | int nbytes; | |
50 | } charcode; | |
51 | } val; | |
52 | }; | |
53 | ||
54 | ||
55 | struct linereader | |
56 | { | |
57 | FILE *fp; | |
58 | const char *fname; | |
59 | char *buf; | |
60 | size_t bufsize; | |
61 | size_t bufact; | |
62 | size_t lineno; | |
63 | ||
64 | size_t idx; | |
65 | ||
66 | char comment_char; | |
67 | char escape_char; | |
68 | ||
69 | struct token token; | |
70 | ||
71 | int translate_strings; | |
72 | ||
73 | kw_hash_fct_t hash_fct; | |
74 | }; | |
75 | ||
76 | ||
77 | /* Functions defined in linereader.c. */ | |
78 | struct linereader *lr_open (const char *fname, kw_hash_fct_t hf); | |
79 | int lr_eof (struct linereader *lr); | |
80 | void lr_close (struct linereader *lr); | |
81 | int lr_next (struct linereader *lr); | |
82 | struct token *lr_token (struct linereader *lr, | |
83 | const struct charset_t *charset); | |
84 | ||
85 | ||
86 | #define lr_error(lr, fmt, args...) \ | |
87 | error_at_line (0, 0, lr->fname, lr->lineno, fmt, ## args) | |
88 | ||
89 | ||
90 | ||
91 | static inline int | |
92 | lr_getc (struct linereader *lr) | |
93 | { | |
94 | if (lr->idx == lr->bufact) | |
95 | { | |
96 | if (lr->bufact != 0) | |
97 | if (lr_next (lr) < 0) | |
98 | return EOF; | |
99 | ||
100 | if (lr->bufact == 0) | |
101 | return EOF; | |
102 | } | |
103 | ||
104 | return lr->buf[lr->idx] == '\32' ? EOF : lr->buf[lr->idx++]; | |
105 | } | |
106 | ||
107 | ||
108 | static inline int | |
109 | lr_ungetc (struct linereader *lr, int ch) | |
110 | { | |
111 | if (lr->idx == 0) | |
112 | return -1; | |
113 | ||
114 | lr->buf[--lr->idx] = ch; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | ||
119 | static inline int | |
ba1ffaa1 | 120 | lr_ungetn (struct linereader *lr, size_t n) |
19bc17a9 RM |
121 | { |
122 | if (lr->idx < n) | |
123 | return -1; | |
124 | ||
125 | lr->idx -= n; | |
126 | return 0; | |
127 | } | |
128 | ||
129 | ||
130 | static inline void | |
131 | lr_ignore_rest (struct linereader *lr, int verbose) | |
132 | { | |
133 | if (verbose) | |
134 | { | |
135 | while (isspace (lr->buf[lr->idx]) && lr->buf[lr->idx] != '\n' | |
136 | && lr->buf[lr->idx] != lr->comment_char) | |
137 | if (lr->buf[lr->idx] == '\0') | |
138 | { | |
139 | if (lr_next (lr) < 0) | |
140 | return; | |
141 | } | |
142 | else | |
143 | ++lr->idx; | |
144 | ||
145 | if (lr->buf[lr->idx] != '\n' &&lr->buf[lr->idx] != lr->comment_char) | |
146 | lr_error (lr, _("trailing garbage at end of line")); | |
147 | } | |
148 | ||
149 | /* Ignore continued line. */ | |
150 | while (lr->bufact > 0 && lr->buf[lr->bufact - 1] != '\n') | |
151 | if (lr_next (lr) < 0) | |
152 | break; | |
153 | ||
154 | lr->idx = lr->bufact; | |
155 | } | |
156 | ||
157 | ||
158 | #endif /* linereader.h */ |