Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
5aff007d | 3 | * Copyright (C) 2004, 2007, 2008 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" | |
29 | #include "charset.h" | |
30 | #include "inputline.h" | |
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) { |
49 | struct dynstr d; | |
50 | int ch; | |
51 | ||
52 | dynstr_init(&d); | |
53 | while((ch = getc(fp)), | |
bb6ae3fb | 54 | (!ferror(fp) && !feof(fp) && ch != newline)) { |
460b9539 | 55 | dynstr_append(&d, ch); |
bb6ae3fb | 56 | if(newline == CRLF && d.nvec >= 2 |
57 | && d.vec[d.nvec - 2] == 0x0D && d.vec[d.nvec - 1] == 0x0A) { | |
58 | d.nvec -= 2; | |
59 | break; | |
60 | } | |
61 | } | |
460b9539 | 62 | if(ferror(fp)) { |
63 | error(errno, "error reading %s", tag); | |
64 | return -1; | |
65 | } else if(feof(fp)) { | |
66 | if(d.nvec != 0) | |
67 | error(0, "error reading %s: unexpected EOF", tag); | |
68 | return -1; | |
69 | } | |
70 | dynstr_terminate(&d); | |
71 | *lp = d.vec; | |
72 | return 0; | |
73 | } | |
74 | ||
75 | /* | |
76 | Local Variables: | |
77 | c-basic-offset:2 | |
78 | comment-column:40 | |
79 | End: | |
80 | */ |