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 | * |
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 by | |
7 | * the Free Software Foundation; either 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, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * 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, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
a99c4e9a RK |
20 | /** @file lib/inputline.c |
21 | * @brief Line input | |
22 | */ | |
460b9539 | 23 | |
24 | #include <config.h> | |
25 | #include "types.h" | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <errno.h> | |
29 | #include <string.h> | |
30 | ||
31 | #include "log.h" | |
32 | #include "mem.h" | |
33 | #include "vector.h" | |
34 | #include "charset.h" | |
35 | #include "inputline.h" | |
36 | ||
a99c4e9a RK |
37 | /** @brief Read a line from @p fp |
38 | * @param tag Used in error messages | |
39 | * @param fp Stream to read from | |
40 | * @param lp Where to store newly allocated string | |
bb6ae3fb | 41 | * @param newline Newline character or @ref CRLF |
a99c4e9a RK |
42 | * @return 0 on success, -1 on error or eof. |
43 | * | |
44 | * The newline is not included in the string. If the last line of a | |
45 | * stream does not have a newline then that line is still returned. | |
46 | * | |
bb6ae3fb | 47 | * If @p newline is @ref CRLF then the line is terminated by CR LF, |
48 | * not by a single newline character. The CRLF is still not included | |
49 | * in the string in this case. | |
50 | * | |
a99c4e9a RK |
51 | * @p *lp is only set if the return value was 0. |
52 | */ | |
460b9539 | 53 | int inputline(const char *tag, FILE *fp, char **lp, int newline) { |
54 | struct dynstr d; | |
55 | int ch; | |
56 | ||
57 | dynstr_init(&d); | |
58 | while((ch = getc(fp)), | |
bb6ae3fb | 59 | (!ferror(fp) && !feof(fp) && ch != newline)) { |
460b9539 | 60 | dynstr_append(&d, ch); |
bb6ae3fb | 61 | if(newline == CRLF && d.nvec >= 2 |
62 | && d.vec[d.nvec - 2] == 0x0D && d.vec[d.nvec - 1] == 0x0A) { | |
63 | d.nvec -= 2; | |
64 | break; | |
65 | } | |
66 | } | |
460b9539 | 67 | if(ferror(fp)) { |
68 | error(errno, "error reading %s", tag); | |
69 | return -1; | |
70 | } else if(feof(fp)) { | |
71 | if(d.nvec != 0) | |
72 | error(0, "error reading %s: unexpected EOF", tag); | |
73 | return -1; | |
74 | } | |
75 | dynstr_terminate(&d); | |
76 | *lp = d.vec; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* | |
81 | Local Variables: | |
82 | c-basic-offset:2 | |
83 | comment-column:40 | |
84 | End: | |
85 | */ |