aafd758410
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-6-git-send-email-peter.maydell@linaro.org
691 lines
17 KiB
C
691 lines
17 KiB
C
/*
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* Simple C functions to supplement the C library
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "qemu/host-utils.h"
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#include <math.h>
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#include "qemu/sockets.h"
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#include "qemu/iov.h"
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#include "net/net.h"
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void strpadcpy(char *buf, int buf_size, const char *str, char pad)
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{
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int len = qemu_strnlen(str, buf_size);
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memcpy(buf, str, len);
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memset(buf + len, pad, buf_size - len);
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}
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void pstrcpy(char *buf, int buf_size, const char *str)
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{
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int c;
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char *q = buf;
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if (buf_size <= 0)
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return;
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for(;;) {
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c = *str++;
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if (c == 0 || q >= buf + buf_size - 1)
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break;
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*q++ = c;
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}
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*q = '\0';
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}
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/* strcat and truncate. */
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char *pstrcat(char *buf, int buf_size, const char *s)
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{
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int len;
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len = strlen(buf);
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if (len < buf_size)
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pstrcpy(buf + len, buf_size - len, s);
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return buf;
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}
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int strstart(const char *str, const char *val, const char **ptr)
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{
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const char *p, *q;
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p = str;
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q = val;
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while (*q != '\0') {
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if (*p != *q)
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return 0;
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p++;
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q++;
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}
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if (ptr)
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*ptr = p;
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return 1;
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}
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int stristart(const char *str, const char *val, const char **ptr)
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{
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const char *p, *q;
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p = str;
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q = val;
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while (*q != '\0') {
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if (qemu_toupper(*p) != qemu_toupper(*q))
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return 0;
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p++;
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q++;
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}
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if (ptr)
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*ptr = p;
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return 1;
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}
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/* XXX: use host strnlen if available ? */
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int qemu_strnlen(const char *s, int max_len)
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{
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int i;
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for(i = 0; i < max_len; i++) {
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if (s[i] == '\0') {
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break;
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}
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}
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return i;
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}
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char *qemu_strsep(char **input, const char *delim)
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{
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char *result = *input;
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if (result != NULL) {
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char *p;
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for (p = result; *p != '\0'; p++) {
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if (strchr(delim, *p)) {
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break;
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}
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}
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if (*p == '\0') {
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*input = NULL;
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} else {
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*p = '\0';
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*input = p + 1;
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}
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}
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return result;
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}
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time_t mktimegm(struct tm *tm)
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{
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time_t t;
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int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday;
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if (m < 3) {
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m += 12;
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y--;
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}
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t = 86400ULL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 +
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y / 400 - 719469);
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t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec;
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return t;
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}
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/*
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* Make sure data goes on disk, but if possible do not bother to
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* write out the inode just for timestamp updates.
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*
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* Unfortunately even in 2009 many operating systems do not support
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* fdatasync and have to fall back to fsync.
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*/
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int qemu_fdatasync(int fd)
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{
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#ifdef CONFIG_FDATASYNC
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return fdatasync(fd);
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#else
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return fsync(fd);
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#endif
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}
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/*
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* Searches for an area with non-zero content in a buffer
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*
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* Attention! The len must be a multiple of
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* BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR * sizeof(VECTYPE)
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* and addr must be a multiple of sizeof(VECTYPE) due to
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* restriction of optimizations in this function.
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*
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* can_use_buffer_find_nonzero_offset() can be used to check
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* these requirements.
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*
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* The return value is the offset of the non-zero area rounded
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* down to a multiple of sizeof(VECTYPE) for the first
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* BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR chunks and down to
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* BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR * sizeof(VECTYPE)
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* afterwards.
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*
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* If the buffer is all zero the return value is equal to len.
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*/
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size_t buffer_find_nonzero_offset(const void *buf, size_t len)
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{
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const VECTYPE *p = buf;
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const VECTYPE zero = (VECTYPE){0};
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size_t i;
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assert(can_use_buffer_find_nonzero_offset(buf, len));
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if (!len) {
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return 0;
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}
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for (i = 0; i < BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR; i++) {
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if (!ALL_EQ(p[i], zero)) {
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return i * sizeof(VECTYPE);
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}
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}
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for (i = BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR;
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i < len / sizeof(VECTYPE);
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i += BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR) {
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VECTYPE tmp0 = VEC_OR(p[i + 0], p[i + 1]);
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VECTYPE tmp1 = VEC_OR(p[i + 2], p[i + 3]);
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VECTYPE tmp2 = VEC_OR(p[i + 4], p[i + 5]);
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VECTYPE tmp3 = VEC_OR(p[i + 6], p[i + 7]);
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VECTYPE tmp01 = VEC_OR(tmp0, tmp1);
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VECTYPE tmp23 = VEC_OR(tmp2, tmp3);
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if (!ALL_EQ(VEC_OR(tmp01, tmp23), zero)) {
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break;
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}
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}
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return i * sizeof(VECTYPE);
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}
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/*
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* Checks if a buffer is all zeroes
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*
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* Attention! The len must be a multiple of 4 * sizeof(long) due to
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* restriction of optimizations in this function.
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*/
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bool buffer_is_zero(const void *buf, size_t len)
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{
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/*
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* Use long as the biggest available internal data type that fits into the
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* CPU register and unroll the loop to smooth out the effect of memory
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* latency.
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*/
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size_t i;
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long d0, d1, d2, d3;
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const long * const data = buf;
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/* use vector optimized zero check if possible */
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if (can_use_buffer_find_nonzero_offset(buf, len)) {
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return buffer_find_nonzero_offset(buf, len) == len;
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}
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assert(len % (4 * sizeof(long)) == 0);
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len /= sizeof(long);
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for (i = 0; i < len; i += 4) {
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d0 = data[i + 0];
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d1 = data[i + 1];
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d2 = data[i + 2];
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d3 = data[i + 3];
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if (d0 || d1 || d2 || d3) {
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return false;
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}
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}
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return true;
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}
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#ifndef _WIN32
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/* Sets a specific flag */
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int fcntl_setfl(int fd, int flag)
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{
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int flags;
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flags = fcntl(fd, F_GETFL);
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if (flags == -1)
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return -errno;
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if (fcntl(fd, F_SETFL, flags | flag) == -1)
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return -errno;
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return 0;
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}
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#endif
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static int64_t suffix_mul(char suffix, int64_t unit)
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{
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switch (qemu_toupper(suffix)) {
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case QEMU_STRTOSZ_DEFSUFFIX_B:
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return 1;
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case QEMU_STRTOSZ_DEFSUFFIX_KB:
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return unit;
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case QEMU_STRTOSZ_DEFSUFFIX_MB:
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return unit * unit;
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case QEMU_STRTOSZ_DEFSUFFIX_GB:
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return unit * unit * unit;
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case QEMU_STRTOSZ_DEFSUFFIX_TB:
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return unit * unit * unit * unit;
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case QEMU_STRTOSZ_DEFSUFFIX_PB:
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return unit * unit * unit * unit * unit;
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case QEMU_STRTOSZ_DEFSUFFIX_EB:
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return unit * unit * unit * unit * unit * unit;
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}
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return -1;
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}
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/*
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* Convert string to bytes, allowing either B/b for bytes, K/k for KB,
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* M/m for MB, G/g for GB or T/t for TB. End pointer will be returned
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* in *end, if not NULL. Return -ERANGE on overflow, Return -EINVAL on
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* other error.
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*/
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int64_t qemu_strtosz_suffix_unit(const char *nptr, char **end,
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const char default_suffix, int64_t unit)
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{
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int64_t retval = -EINVAL;
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char *endptr;
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unsigned char c;
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int mul_required = 0;
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double val, mul, integral, fraction;
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errno = 0;
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val = strtod(nptr, &endptr);
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if (isnan(val) || endptr == nptr || errno != 0) {
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goto fail;
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}
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fraction = modf(val, &integral);
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if (fraction != 0) {
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mul_required = 1;
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}
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c = *endptr;
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mul = suffix_mul(c, unit);
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if (mul >= 0) {
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endptr++;
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} else {
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mul = suffix_mul(default_suffix, unit);
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assert(mul >= 0);
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}
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if (mul == 1 && mul_required) {
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goto fail;
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}
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if ((val * mul >= INT64_MAX) || val < 0) {
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retval = -ERANGE;
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goto fail;
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}
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retval = val * mul;
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fail:
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if (end) {
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*end = endptr;
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}
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return retval;
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}
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int64_t qemu_strtosz_suffix(const char *nptr, char **end,
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const char default_suffix)
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{
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return qemu_strtosz_suffix_unit(nptr, end, default_suffix, 1024);
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}
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int64_t qemu_strtosz(const char *nptr, char **end)
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{
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return qemu_strtosz_suffix(nptr, end, QEMU_STRTOSZ_DEFSUFFIX_MB);
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}
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/**
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* Helper function for qemu_strto*l() functions.
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*/
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static int check_strtox_error(const char *p, char *endptr, const char **next,
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int err)
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{
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/* If no conversion was performed, prefer BSD behavior over glibc
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* behavior.
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*/
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if (err == 0 && endptr == p) {
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err = EINVAL;
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}
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if (!next && *endptr) {
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return -EINVAL;
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}
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if (next) {
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*next = endptr;
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}
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return -err;
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}
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/**
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* QEMU wrappers for strtol(), strtoll(), strtoul(), strotull() C functions.
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*
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* Convert ASCII string @nptr to a long integer value
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* from the given @base. Parameters @nptr, @endptr, @base
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* follows same semantics as strtol() C function.
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*
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* Unlike from strtol() function, if @endptr is not NULL, this
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* function will return -EINVAL whenever it cannot fully convert
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* the string in @nptr with given @base to a long. This function returns
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* the result of the conversion only through the @result parameter.
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*
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* If NULL is passed in @endptr, then the whole string in @ntpr
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* is a number otherwise it returns -EINVAL.
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*
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* RETURN VALUE
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* Unlike from strtol() function, this wrapper returns either
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* -EINVAL or the errno set by strtol() function (e.g -ERANGE).
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* If the conversion overflows, -ERANGE is returned, and @result
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* is set to the max value of the desired type
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* (e.g. LONG_MAX, LLONG_MAX, ULONG_MAX, ULLONG_MAX). If the case
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* of underflow, -ERANGE is returned, and @result is set to the min
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* value of the desired type. For strtol(), strtoll(), @result is set to
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* LONG_MIN, LLONG_MIN, respectively, and for strtoul(), strtoull() it
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* is set to 0.
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*/
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int qemu_strtol(const char *nptr, const char **endptr, int base,
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long *result)
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{
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char *p;
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int err = 0;
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if (!nptr) {
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if (endptr) {
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*endptr = nptr;
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}
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err = -EINVAL;
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} else {
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errno = 0;
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*result = strtol(nptr, &p, base);
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err = check_strtox_error(nptr, p, endptr, errno);
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}
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return err;
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}
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/**
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* Converts ASCII string to an unsigned long integer.
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*
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* If string contains a negative number, value will be converted to
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* the unsigned representation of the signed value, unless the original
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* (nonnegated) value would overflow, in this case, it will set @result
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* to ULONG_MAX, and return ERANGE.
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*
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* The same behavior holds, for qemu_strtoull() but sets @result to
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* ULLONG_MAX instead of ULONG_MAX.
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*
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* See qemu_strtol() documentation for more info.
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*/
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int qemu_strtoul(const char *nptr, const char **endptr, int base,
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unsigned long *result)
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{
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char *p;
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int err = 0;
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if (!nptr) {
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if (endptr) {
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*endptr = nptr;
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}
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err = -EINVAL;
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} else {
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errno = 0;
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*result = strtoul(nptr, &p, base);
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/* Windows returns 1 for negative out-of-range values. */
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if (errno == ERANGE) {
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*result = -1;
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}
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err = check_strtox_error(nptr, p, endptr, errno);
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}
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return err;
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}
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/**
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* Converts ASCII string to a long long integer.
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*
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* See qemu_strtol() documentation for more info.
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*/
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int qemu_strtoll(const char *nptr, const char **endptr, int base,
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int64_t *result)
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{
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char *p;
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int err = 0;
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if (!nptr) {
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if (endptr) {
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*endptr = nptr;
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}
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err = -EINVAL;
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} else {
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errno = 0;
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*result = strtoll(nptr, &p, base);
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err = check_strtox_error(nptr, p, endptr, errno);
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}
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return err;
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}
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/**
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* Converts ASCII string to an unsigned long long integer.
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*
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* See qemu_strtol() documentation for more info.
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*/
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int qemu_strtoull(const char *nptr, const char **endptr, int base,
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uint64_t *result)
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{
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char *p;
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int err = 0;
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if (!nptr) {
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if (endptr) {
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*endptr = nptr;
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}
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err = -EINVAL;
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} else {
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errno = 0;
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*result = strtoull(nptr, &p, base);
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/* Windows returns 1 for negative out-of-range values. */
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if (errno == ERANGE) {
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*result = -1;
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}
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err = check_strtox_error(nptr, p, endptr, errno);
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}
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return err;
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}
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/**
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* parse_uint:
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*
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* @s: String to parse
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* @value: Destination for parsed integer value
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* @endptr: Destination for pointer to first character not consumed
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* @base: integer base, between 2 and 36 inclusive, or 0
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*
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* Parse unsigned integer
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*
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* Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional
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* '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits.
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*
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* If @s is null, or @base is invalid, or @s doesn't start with an
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* integer in the syntax above, set *@value to 0, *@endptr to @s, and
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* return -EINVAL.
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*
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* Set *@endptr to point right beyond the parsed integer (even if the integer
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* overflows or is negative, all digits will be parsed and *@endptr will
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* point right beyond them).
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*
|
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* If the integer is negative, set *@value to 0, and return -ERANGE.
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|
*
|
|
* If the integer overflows unsigned long long, set *@value to
|
|
* ULLONG_MAX, and return -ERANGE.
|
|
*
|
|
* Else, set *@value to the parsed integer, and return 0.
|
|
*/
|
|
int parse_uint(const char *s, unsigned long long *value, char **endptr,
|
|
int base)
|
|
{
|
|
int r = 0;
|
|
char *endp = (char *)s;
|
|
unsigned long long val = 0;
|
|
|
|
if (!s) {
|
|
r = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
errno = 0;
|
|
val = strtoull(s, &endp, base);
|
|
if (errno) {
|
|
r = -errno;
|
|
goto out;
|
|
}
|
|
|
|
if (endp == s) {
|
|
r = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* make sure we reject negative numbers: */
|
|
while (isspace((unsigned char)*s)) {
|
|
s++;
|
|
}
|
|
if (*s == '-') {
|
|
val = 0;
|
|
r = -ERANGE;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
*value = val;
|
|
*endptr = endp;
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* parse_uint_full:
|
|
*
|
|
* @s: String to parse
|
|
* @value: Destination for parsed integer value
|
|
* @base: integer base, between 2 and 36 inclusive, or 0
|
|
*
|
|
* Parse unsigned integer from entire string
|
|
*
|
|
* Have the same behavior of parse_uint(), but with an additional check
|
|
* for additional data after the parsed number. If extra characters are present
|
|
* after the parsed number, the function will return -EINVAL, and *@v will
|
|
* be set to 0.
|
|
*/
|
|
int parse_uint_full(const char *s, unsigned long long *value, int base)
|
|
{
|
|
char *endp;
|
|
int r;
|
|
|
|
r = parse_uint(s, value, &endp, base);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
if (*endp) {
|
|
*value = 0;
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int qemu_parse_fd(const char *param)
|
|
{
|
|
long fd;
|
|
char *endptr;
|
|
|
|
errno = 0;
|
|
fd = strtol(param, &endptr, 10);
|
|
if (param == endptr /* no conversion performed */ ||
|
|
errno != 0 /* not representable as long; possibly others */ ||
|
|
*endptr != '\0' /* final string not empty */ ||
|
|
fd < 0 /* invalid as file descriptor */ ||
|
|
fd > INT_MAX /* not representable as int */) {
|
|
return -1;
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
/*
|
|
* Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
|
|
* Input is limited to 14-bit numbers
|
|
*/
|
|
int uleb128_encode_small(uint8_t *out, uint32_t n)
|
|
{
|
|
g_assert(n <= 0x3fff);
|
|
if (n < 0x80) {
|
|
*out++ = n;
|
|
return 1;
|
|
} else {
|
|
*out++ = (n & 0x7f) | 0x80;
|
|
*out++ = n >> 7;
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
int uleb128_decode_small(const uint8_t *in, uint32_t *n)
|
|
{
|
|
if (!(*in & 0x80)) {
|
|
*n = *in++;
|
|
return 1;
|
|
} else {
|
|
*n = *in++ & 0x7f;
|
|
/* we exceed 14 bit number */
|
|
if (*in & 0x80) {
|
|
return -1;
|
|
}
|
|
*n |= *in++ << 7;
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* helper to parse debug environment variables
|
|
*/
|
|
int parse_debug_env(const char *name, int max, int initial)
|
|
{
|
|
char *debug_env = getenv(name);
|
|
char *inv = NULL;
|
|
long debug;
|
|
|
|
if (!debug_env) {
|
|
return initial;
|
|
}
|
|
errno = 0;
|
|
debug = strtol(debug_env, &inv, 10);
|
|
if (inv == debug_env) {
|
|
return initial;
|
|
}
|
|
if (debug < 0 || debug > max || errno != 0) {
|
|
fprintf(stderr, "warning: %s not in [0, %d]", name, max);
|
|
return initial;
|
|
}
|
|
return debug;
|
|
}
|
|
|
|
/*
|
|
* Helper to print ethernet mac address
|
|
*/
|
|
const char *qemu_ether_ntoa(const MACAddr *mac)
|
|
{
|
|
static char ret[18];
|
|
|
|
snprintf(ret, sizeof(ret), "%02x:%02x:%02x:%02x:%02x:%02x",
|
|
mac->a[0], mac->a[1], mac->a[2], mac->a[3], mac->a[4], mac->a[5]);
|
|
|
|
return ret;
|
|
}
|