460b9539 |
1 | /* |
2 | * This file is part of DisOrder |
3 | * Copyright (C) 2004 Richard Kettlewell |
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 | */ |
20 | |
21 | #ifndef SINK_H |
22 | #define SINK_H |
23 | |
24 | /* a sink is something you write to (the opposite would be a source) */ |
25 | |
26 | struct dynstr; |
27 | |
28 | struct sink { |
29 | int (*write)(struct sink *s, const void *buffer, int nbytes); |
30 | /* return >= 0 on success, -1 on error */ |
31 | }; |
32 | |
33 | struct sink *sink_stdio(const char *name, FILE *fp); |
34 | /* return a sink which writes to @fp@. If @name@ is not a null |
35 | * pointer, it will be used in (fatal) error messages; if it is a null |
36 | * pointer then errors will be signalled by returning -1. */ |
37 | |
38 | struct sink *sink_dynstr(struct dynstr *output); |
39 | /* return a sink which appends to @output@. */ |
40 | |
41 | int sink_vprintf(struct sink *s, const char *fmt, va_list ap); |
42 | int sink_printf(struct sink *s, const char *fmt, ...) |
43 | attribute((format (printf, 2, 3))); |
44 | /* equivalent of vfprintf/fprintf for sink @s@ */ |
45 | |
46 | static inline int sink_write(struct sink *s, const void *buffer, int nbytes) { |
47 | return s->write(s, buffer, nbytes); |
48 | } |
49 | |
50 | static inline int sink_writes(struct sink *s, const char *str) { |
51 | return s->write(s, str, strlen(str)); |
52 | } |
53 | |
54 | static inline int sink_writec(struct sink *s, char c) { |
55 | return s->write(s, &c, 1); |
56 | } |
57 | |
58 | #endif /* SINK_H */ |
59 | |
60 | |
61 | /* |
62 | Local Variables: |
63 | c-basic-offset:2 |
64 | comment-column:40 |
65 | End: |
66 | */ |