2 * Simple C functions to supplement the C library
4 * Copyright (c) 2006 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 #include "qemu-common.h"
25 #include "host-utils.h"
28 void pstrcpy(char *buf, int buf_size, const char *str)
38 if (c == 0 || q >= buf + buf_size - 1)
45 /* strcat and truncate. */
46 char *pstrcat(char *buf, int buf_size, const char *s)
51 pstrcpy(buf + len, buf_size - len, s);
55 int strstart(const char *str, const char *val, const char **ptr)
71 int stristart(const char *str, const char *val, const char **ptr)
77 if (qemu_toupper(*p) != qemu_toupper(*q))
87 time_t mktimegm(struct tm *tm)
90 int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
95 t = 86400 * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 +
97 t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
103 return 32 - clz32(i);
108 void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint)
110 qiov->iov = qemu_malloc(alloc_hint * sizeof(struct iovec));
112 qiov->nalloc = alloc_hint;
116 void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov)
124 for (i = 0; i < niov; i++)
125 qiov->size += iov[i].iov_len;
128 void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len)
130 assert(qiov->nalloc != -1);
132 if (qiov->niov == qiov->nalloc) {
133 qiov->nalloc = 2 * qiov->nalloc + 1;
134 qiov->iov = qemu_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec));
136 qiov->iov[qiov->niov].iov_base = base;
137 qiov->iov[qiov->niov].iov_len = len;
142 void qemu_iovec_destroy(QEMUIOVector *qiov)
144 assert(qiov->nalloc != -1);
146 qemu_free(qiov->iov);
149 void qemu_iovec_reset(QEMUIOVector *qiov)
151 assert(qiov->nalloc != -1);
157 void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf)
159 uint8_t *p = (uint8_t *)buf;
162 for (i = 0; i < qiov->niov; ++i) {
163 memcpy(p, qiov->iov[i].iov_base, qiov->iov[i].iov_len);
164 p += qiov->iov[i].iov_len;
168 void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t count)
170 const uint8_t *p = (const uint8_t *)buf;
174 for (i = 0; i < qiov->niov && count; ++i) {
176 if (copy > qiov->iov[i].iov_len)
177 copy = qiov->iov[i].iov_len;
178 memcpy(qiov->iov[i].iov_base, p, copy);