2 * This file is part of DisOrder
3 * Copyright (C) 2004, 2007, 2008 Richard Kettlewell
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 3 of the License, or
8 * (at your option) any later version.
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.
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/>.
18 /** @file lib/snprintf.c
19 * @brief UTF-8 capable *snprintf workalikes
22 #define NO_MEMORY_ALLOCATION
23 /* because used from log.c */
33 /** @brief A @ref sink that stores to a fixed buffer
35 * If there is too much output, it is truncated.
37 struct fixedstr_sink {
41 /** @brief Output buffer */
44 /** @brief Bytes written so far */
47 /** @brief Size of buffer */
51 static int fixedstr_write(struct sink *f, const void *buffer, int nbytes) {
52 struct fixedstr_sink *s = (struct fixedstr_sink *)f;
55 if((size_t)s->nbytes < s->size) {
56 if((size_t)nbytes > s->size - s->nbytes)
57 count = s->size - s->nbytes;
60 memcpy(s->buffer + s->nbytes, buffer, count);
66 int byte_vsnprintf(char buffer[],
70 struct fixedstr_sink s;
73 /* We have to make a sink directly here, since we can't safely do memory
74 * allocation here (we might be formatting the error message from a failed
75 * memory allocation) */
76 s.s.write = fixedstr_write;
80 n = byte_vsinkprintf(&s.s, fmt, ap);
82 /* add the null terminator (even if the printf failed) */
84 if((size_t)m >= bufsize) m = bufsize - 1;
90 int byte_snprintf(char buffer[], size_t bufsize, const char *fmt, ...) {
95 n = byte_vsnprintf(buffer, bufsize, fmt, ap);