1/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper, <drepper@gnu.org>.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; version 2 of the License, or
8 (at your option) any later version.
9
10 This program 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
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
17
18#ifndef _LINEREADER_H
19#define _LINEREADER_H 1
20
21#include <ctype.h>
22#include <libintl.h>
23#include <stdint.h>
24#include <stdio.h>
25
26#include "charmap.h"
27#include "error.h"
28#include "locfile-token.h"
29#include "repertoire.h"
30#include "record-status.h"
31
32typedef const struct keyword_t *(*kw_hash_fct_t) (const char *, size_t);
33struct charset_t;
34struct localedef_t;
35
36struct token
37{
38 enum token_t tok;
39 union
40 {
41 struct
42 {
43 char *startmb;
44 size_t lenmb;
45 uint32_t *startwc;
46 size_t lenwc;
47 } str;
48 unsigned long int num;
49 struct
50 {
51 /* This element is sized on the safe expectation that no single
52 character in any character set uses more than 16 bytes. */
53 unsigned char bytes[16];
54 int nbytes;
55 } charcode;
56 uint32_t ucs4;
57 } val;
58};
59
60
61struct linereader
62{
63 FILE *fp;
64 const char *fname;
65 char *buf;
66 size_t bufsize;
67 size_t bufact;
68 size_t lineno;
69
70 size_t idx;
71
72 char comment_char;
73 char escape_char;
74
75 struct token token;
76
77 int translate_strings;
78 int return_widestr;
79
80 kw_hash_fct_t hash_fct;
81};
82
83
84/* Functions defined in linereader.c. */
85extern struct linereader *lr_open (const char *fname, kw_hash_fct_t hf);
86extern struct linereader *lr_create (FILE *fp, const char *fname,
87 kw_hash_fct_t hf);
88extern int lr_eof (struct linereader *lr);
89extern void lr_close (struct linereader *lr);
90extern int lr_next (struct linereader *lr);
91extern struct token *lr_token (struct linereader *lr,
92 const struct charmap_t *charmap,
93 struct localedef_t *locale,
94 const struct repertoire_t *repertoire,
95 int verbose);
96extern void lr_ignore_rest (struct linereader *lr, int verbose);
97
98
99static inline void
100__attribute__ ((__format__ (__printf__, 2, 3), nonnull (1, 2)))
101lr_error (struct linereader *lr, const char *fmt, ...)
102{
103 char *str;
104 va_list arg;
105 struct locale_state ls;
106 int ret;
107
108 va_start (arg, fmt);
109 ls = push_locale ();
110
111 ret = vasprintf (&str, fmt, arg);
112 if (ret == -1)
113 abort ();
114
115 pop_locale (ls);
116 va_end (arg);
117
118 error_at_line (0, 0, lr->fname, lr->lineno, "%s", str);
119
120 free (str);
121}
122
123
124static inline int
125__attribute ((always_inline))
126lr_getc (struct linereader *lr)
127{
128 if (lr->idx == lr->bufact)
129 {
130 if (lr->bufact != 0)
131 if (lr_next (lr) < 0)
132 return EOF;
133
134 if (lr->bufact == 0)
135 return EOF;
136 }
137
138 return lr->buf[lr->idx] == '\32' ? EOF : lr->buf[lr->idx++];
139}
140
141
142static inline int
143__attribute ((always_inline))
144lr_ungetc (struct linereader *lr, int ch)
145{
146 if (lr->idx == 0)
147 return -1;
148
149 if (ch != EOF)
150 lr->buf[--lr->idx] = ch;
151 return 0;
152}
153
154
155static inline int
156lr_ungetn (struct linereader *lr, size_t n)
157{
158 if (lr->idx < n)
159 return -1;
160
161 lr->idx -= n;
162 return 0;
163}
164
165
166#endif /* linereader.h */
167