1/* Copyright (C) 1996-2016 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 <http://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
31
32typedef const struct keyword_t *(*kw_hash_fct_t) (const char *, unsigned int);
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
99#define lr_error(lr, fmt, args...) \
100 WITH_CUR_LOCALE (error_at_line (0, 0, lr->fname, lr->lineno, fmt, ## args))
101
102
103
104static inline int
105__attribute ((always_inline))
106lr_getc (struct linereader *lr)
107{
108 if (lr->idx == lr->bufact)
109 {
110 if (lr->bufact != 0)
111 if (lr_next (lr) < 0)
112 return EOF;
113
114 if (lr->bufact == 0)
115 return EOF;
116 }
117
118 return lr->buf[lr->idx] == '\32' ? EOF : lr->buf[lr->idx++];
119}
120
121
122static inline int
123__attribute ((always_inline))
124lr_ungetc (struct linereader *lr, int ch)
125{
126 if (lr->idx == 0)
127 return -1;
128
129 if (ch != EOF)
130 lr->buf[--lr->idx] = ch;
131 return 0;
132}
133
134
135static inline int
136lr_ungetn (struct linereader *lr, size_t n)
137{
138 if (lr->idx < n)
139 return -1;
140
141 lr->idx -= n;
142 return 0;
143}
144
145
146#endif /* linereader.h */
147