Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
3f471d1c | 3 | * Copyright (C) 2004, 2007-9, 2013 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
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 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
a99c4e9a RK |
18 | /** @file lib/inputline.c |
19 | * @brief Line input | |
20 | */ | |
460b9539 | 21 | |
05b75f8d | 22 | #include "common.h" |
460b9539 | 23 | |
460b9539 | 24 | #include <errno.h> |
460b9539 | 25 | |
26 | #include "log.h" | |
27 | #include "mem.h" | |
28 | #include "vector.h" | |
460b9539 | 29 | #include "inputline.h" |
3f471d1c | 30 | #include "sink.h" |
460b9539 | 31 | |
a99c4e9a RK |
32 | /** @brief Read a line from @p fp |
33 | * @param tag Used in error messages | |
34 | * @param fp Stream to read from | |
35 | * @param lp Where to store newly allocated string | |
bb6ae3fb | 36 | * @param newline Newline character or @ref CRLF |
a99c4e9a RK |
37 | * @return 0 on success, -1 on error or eof. |
38 | * | |
39 | * The newline is not included in the string. If the last line of a | |
40 | * stream does not have a newline then that line is still returned. | |
41 | * | |
bb6ae3fb | 42 | * If @p newline is @ref CRLF then the line is terminated by CR LF, |
43 | * not by a single newline character. The CRLF is still not included | |
44 | * in the string in this case. | |
45 | * | |
a99c4e9a RK |
46 | * @p *lp is only set if the return value was 0. |
47 | */ | |
460b9539 | 48 | int inputline(const char *tag, FILE *fp, char **lp, int newline) { |
3f471d1c RK |
49 | struct source *s = source_stdio(fp); |
50 | int rc = inputlines(tag, s, lp, newline); | |
51 | xfree(s); | |
52 | return rc; | |
53 | } | |
54 | ||
55 | int inputlines(const char *tag, struct source *s, char **lp, int newline) { | |
460b9539 | 56 | struct dynstr d; |
3f471d1c RK |
57 | int ch, err; |
58 | char errbuf[1024]; | |
460b9539 | 59 | |
60 | dynstr_init(&d); | |
3f471d1c RK |
61 | while((ch = source_getc(s)), |
62 | (!source_err(s) && !source_eof(s) && ch != newline)) { | |
460b9539 | 63 | dynstr_append(&d, ch); |
bb6ae3fb | 64 | if(newline == CRLF && d.nvec >= 2 |
65 | && d.vec[d.nvec - 2] == 0x0D && d.vec[d.nvec - 1] == 0x0A) { | |
66 | d.nvec -= 2; | |
67 | break; | |
68 | } | |
69 | } | |
3f471d1c RK |
70 | if((err = source_err(s))) { |
71 | disorder_error(0, "error reading %s: %s", tag, | |
72 | format_error(s->eclass, err, errbuf, sizeof errbuf)); | |
460b9539 | 73 | return -1; |
3f471d1c | 74 | } else if(source_eof(s)) { |
460b9539 | 75 | if(d.nvec != 0) |
2e9ba080 | 76 | disorder_error(0, "error reading %s: unexpected EOF", tag); |
460b9539 | 77 | return -1; |
78 | } | |
79 | dynstr_terminate(&d); | |
80 | *lp = d.vec; | |
81 | return 0; | |
82 | } | |
83 | ||
84 | /* | |
85 | Local Variables: | |
86 | c-basic-offset:2 | |
87 | comment-column:40 | |
88 | End: | |
89 | */ |