Annotation of qemu/cutils.c, revision 1.1.1.4

1.1       root        1: /*
                      2:  * Simple C functions to supplement the C library
1.1.1.2   root        3:  *
1.1       root        4:  * Copyright (c) 2006 Fabrice Bellard
                      5:  *
                      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:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     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
                     22:  * THE SOFTWARE.
                     23:  */
1.1.1.2   root       24: #include "qemu-common.h"
1.1.1.3   root       25: #include "host-utils.h"
1.1       root       26: 
                     27: void pstrcpy(char *buf, int buf_size, const char *str)
                     28: {
                     29:     int c;
                     30:     char *q = buf;
                     31: 
                     32:     if (buf_size <= 0)
                     33:         return;
                     34: 
                     35:     for(;;) {
                     36:         c = *str++;
                     37:         if (c == 0 || q >= buf + buf_size - 1)
                     38:             break;
                     39:         *q++ = c;
                     40:     }
                     41:     *q = '\0';
                     42: }
                     43: 
                     44: /* strcat and truncate. */
                     45: char *pstrcat(char *buf, int buf_size, const char *s)
                     46: {
                     47:     int len;
                     48:     len = strlen(buf);
1.1.1.2   root       49:     if (len < buf_size)
1.1       root       50:         pstrcpy(buf + len, buf_size - len, s);
                     51:     return buf;
                     52: }
                     53: 
                     54: int strstart(const char *str, const char *val, const char **ptr)
                     55: {
                     56:     const char *p, *q;
                     57:     p = str;
                     58:     q = val;
                     59:     while (*q != '\0') {
                     60:         if (*p != *q)
                     61:             return 0;
                     62:         p++;
                     63:         q++;
                     64:     }
                     65:     if (ptr)
                     66:         *ptr = p;
                     67:     return 1;
                     68: }
                     69: 
                     70: int stristart(const char *str, const char *val, const char **ptr)
                     71: {
                     72:     const char *p, *q;
                     73:     p = str;
                     74:     q = val;
                     75:     while (*q != '\0') {
1.1.1.3   root       76:         if (qemu_toupper(*p) != qemu_toupper(*q))
1.1       root       77:             return 0;
                     78:         p++;
                     79:         q++;
                     80:     }
                     81:     if (ptr)
                     82:         *ptr = p;
                     83:     return 1;
                     84: }
1.1.1.2   root       85: 
1.1.1.4 ! root       86: /* XXX: use host strnlen if available ? */
        !            87: int qemu_strnlen(const char *s, int max_len)
        !            88: {
        !            89:     int i;
        !            90: 
        !            91:     for(i = 0; i < max_len; i++) {
        !            92:         if (s[i] == '\0') {
        !            93:             break;
        !            94:         }
        !            95:     }
        !            96:     return i;
        !            97: }
        !            98: 
1.1.1.2   root       99: time_t mktimegm(struct tm *tm)
                    100: {
                    101:     time_t t;
                    102:     int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
                    103:     if (m < 3) {
                    104:         m += 12;
                    105:         y--;
                    106:     }
                    107:     t = 86400 * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 
                    108:                  y / 400 - 719469);
                    109:     t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
                    110:     return t;
                    111: }
1.1.1.3   root      112: 
                    113: int qemu_fls(int i)
                    114: {
                    115:     return 32 - clz32(i);
                    116: }
                    117: 
                    118: /* io vectors */
                    119: 
                    120: void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint)
                    121: {
                    122:     qiov->iov = qemu_malloc(alloc_hint * sizeof(struct iovec));
                    123:     qiov->niov = 0;
                    124:     qiov->nalloc = alloc_hint;
                    125:     qiov->size = 0;
                    126: }
                    127: 
1.1.1.4 ! root      128: void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov)
        !           129: {
        !           130:     int i;
        !           131: 
        !           132:     qiov->iov = iov;
        !           133:     qiov->niov = niov;
        !           134:     qiov->nalloc = -1;
        !           135:     qiov->size = 0;
        !           136:     for (i = 0; i < niov; i++)
        !           137:         qiov->size += iov[i].iov_len;
        !           138: }
        !           139: 
1.1.1.3   root      140: void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len)
                    141: {
1.1.1.4 ! root      142:     assert(qiov->nalloc != -1);
        !           143: 
1.1.1.3   root      144:     if (qiov->niov == qiov->nalloc) {
                    145:         qiov->nalloc = 2 * qiov->nalloc + 1;
                    146:         qiov->iov = qemu_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec));
                    147:     }
                    148:     qiov->iov[qiov->niov].iov_base = base;
                    149:     qiov->iov[qiov->niov].iov_len = len;
                    150:     qiov->size += len;
                    151:     ++qiov->niov;
                    152: }
                    153: 
                    154: void qemu_iovec_destroy(QEMUIOVector *qiov)
                    155: {
1.1.1.4 ! root      156:     assert(qiov->nalloc != -1);
        !           157: 
1.1.1.3   root      158:     qemu_free(qiov->iov);
                    159: }
                    160: 
                    161: void qemu_iovec_reset(QEMUIOVector *qiov)
                    162: {
1.1.1.4 ! root      163:     assert(qiov->nalloc != -1);
        !           164: 
1.1.1.3   root      165:     qiov->niov = 0;
                    166:     qiov->size = 0;
                    167: }
                    168: 
                    169: void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf)
                    170: {
                    171:     uint8_t *p = (uint8_t *)buf;
                    172:     int i;
                    173: 
                    174:     for (i = 0; i < qiov->niov; ++i) {
                    175:         memcpy(p, qiov->iov[i].iov_base, qiov->iov[i].iov_len);
                    176:         p += qiov->iov[i].iov_len;
                    177:     }
                    178: }
                    179: 
                    180: void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t count)
                    181: {
                    182:     const uint8_t *p = (const uint8_t *)buf;
                    183:     size_t copy;
                    184:     int i;
                    185: 
                    186:     for (i = 0; i < qiov->niov && count; ++i) {
                    187:         copy = count;
                    188:         if (copy > qiov->iov[i].iov_len)
                    189:             copy = qiov->iov[i].iov_len;
                    190:         memcpy(qiov->iov[i].iov_base, p, copy);
                    191:         p     += copy;
                    192:         count -= copy;
                    193:     }
                    194: }

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