0f9668e0c1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1026 lines
27 KiB
C
1026 lines
27 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/host-utils.h"
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#include <math.h>
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#include "qemu/ctype.h"
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#include "qemu/cutils.h"
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#include "qemu/error-report.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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* Sync changes made to the memory mapped file back to the backing
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* storage. For POSIX compliant systems this will fallback
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* to regular msync call. Otherwise it will trigger whole file sync
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* (including the metadata case there is no support to skip that otherwise)
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*
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* @addr - start of the memory area to be synced
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* @length - length of the are to be synced
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* @fd - file descriptor for the file to be synced
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* (mandatory only for POSIX non-compliant systems)
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*/
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int qemu_msync(void *addr, size_t length, int fd)
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{
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#ifdef CONFIG_POSIX
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size_t align_mask = ~(qemu_real_host_page_size() - 1);
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/**
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* There are no strict reqs as per the length of mapping
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* to be synced. Still the length needs to follow the address
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* alignment changes. Additionally - round the size to the multiple
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* of PAGE_SIZE
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*/
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length += ((uintptr_t)addr & (qemu_real_host_page_size() - 1));
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length = (length + ~align_mask) & align_mask;
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addr = (void *)((uintptr_t)addr & align_mask);
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return msync(addr, length, MS_SYNC);
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#else /* CONFIG_POSIX */
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/**
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* Perform the sync based on the file descriptor
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* The sync range will most probably be wider than the one
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* requested - but it will still get the job done
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*/
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return qemu_fdatasync(fd);
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#endif /* CONFIG_POSIX */
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}
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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 'B':
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return 1;
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case 'K':
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return unit;
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case 'M':
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return unit * unit;
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case 'G':
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return unit * unit * unit;
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case 'T':
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return unit * unit * unit * unit;
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case 'P':
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return unit * unit * unit * unit * unit;
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case 'E':
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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 size string to bytes.
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*
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* The size parsing supports the following syntaxes
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* - 12345 - decimal, scale determined by @default_suffix and @unit
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* - 12345{bBkKmMgGtTpPeE} - decimal, scale determined by suffix and @unit
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* - 12345.678{kKmMgGtTpPeE} - decimal, scale determined by suffix, and
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* fractional portion is truncated to byte
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* - 0x7fEE - hexadecimal, unit determined by @default_suffix
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*
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* The following cause a deprecation warning, and may be removed in the future
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* - 0xabc{kKmMgGtTpP} - hex with scaling suffix
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*
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* The following are intentionally not supported
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* - octal, such as 08
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* - fractional hex, such as 0x1.8
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* - floating point exponents, such as 1e3
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*
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* The end pointer will be returned in *end, if not NULL. If there is
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* no fraction, the input can be decimal or hexadecimal; if there is a
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* fraction, then the input must be decimal and there must be a suffix
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* (possibly by @default_suffix) larger than Byte, and the fractional
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* portion may suffer from precision loss or rounding. The input must
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* be positive.
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*
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* Return -ERANGE on overflow (with *@end advanced), and -EINVAL on
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* other error (with *@end left unchanged).
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*/
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static int do_strtosz(const char *nptr, const char **end,
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const char default_suffix, int64_t unit,
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uint64_t *result)
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{
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int retval;
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const char *endptr, *f;
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unsigned char c;
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bool hex = false;
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uint64_t val, valf = 0;
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int64_t mul;
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/* Parse integral portion as decimal. */
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retval = qemu_strtou64(nptr, &endptr, 10, &val);
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if (retval) {
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goto out;
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}
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if (memchr(nptr, '-', endptr - nptr) != NULL) {
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endptr = nptr;
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retval = -EINVAL;
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goto out;
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}
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if (val == 0 && (*endptr == 'x' || *endptr == 'X')) {
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/* Input looks like hex, reparse, and insist on no fraction. */
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retval = qemu_strtou64(nptr, &endptr, 16, &val);
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if (retval) {
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goto out;
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}
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if (*endptr == '.') {
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endptr = nptr;
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retval = -EINVAL;
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goto out;
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}
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hex = true;
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} else if (*endptr == '.') {
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/*
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* Input looks like a fraction. Make sure even 1.k works
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* without fractional digits. If we see an exponent, treat
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* the entire input as invalid instead.
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*/
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double fraction;
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f = endptr;
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retval = qemu_strtod_finite(f, &endptr, &fraction);
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if (retval) {
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endptr++;
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} else if (memchr(f, 'e', endptr - f) || memchr(f, 'E', endptr - f)) {
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endptr = nptr;
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retval = -EINVAL;
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goto out;
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} else {
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/* Extract into a 64-bit fixed-point fraction. */
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valf = (uint64_t)(fraction * 0x1p64);
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}
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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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if (hex) {
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warn_report("Using a multiplier suffix on hex numbers "
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"is deprecated: %s", nptr);
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}
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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) {
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/* When a fraction is present, a scale is required. */
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if (valf != 0) {
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endptr = nptr;
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retval = -EINVAL;
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goto out;
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}
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} else {
|
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uint64_t valh, tmp;
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/* Compute exact result: 64.64 x 64.0 -> 128.64 fixed point */
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mulu64(&val, &valh, val, mul);
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mulu64(&valf, &tmp, valf, mul);
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val += tmp;
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valh += val < tmp;
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|
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/* Round 0.5 upward. */
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tmp = valf >> 63;
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val += tmp;
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valh += val < tmp;
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/* Report overflow. */
|
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if (valh != 0) {
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retval = -ERANGE;
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goto out;
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}
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}
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retval = 0;
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out:
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if (end) {
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*end = endptr;
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} else if (*endptr) {
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retval = -EINVAL;
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}
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if (retval == 0) {
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*result = val;
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}
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return retval;
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}
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int qemu_strtosz(const char *nptr, const char **end, uint64_t *result)
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{
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return do_strtosz(nptr, end, 'B', 1024, result);
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}
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int qemu_strtosz_MiB(const char *nptr, const char **end, uint64_t *result)
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{
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return do_strtosz(nptr, end, 'M', 1024, result);
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}
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int qemu_strtosz_metric(const char *nptr, const char **end, uint64_t *result)
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{
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return do_strtosz(nptr, end, 'B', 1000, result);
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}
|
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|
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/**
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* Helper function for error checking after strtol() and the like
|
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*/
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static int check_strtox_error(const char *nptr, char *ep,
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const char **endptr, bool check_zero,
|
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int libc_errno)
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{
|
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assert(ep >= nptr);
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|
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/* Windows has a bug in that it fails to parse 0 from "0x" in base 16 */
|
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if (check_zero && ep == nptr && libc_errno == 0) {
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char *tmp;
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errno = 0;
|
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if (strtol(nptr, &tmp, 10) == 0 && errno == 0 &&
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(*tmp == 'x' || *tmp == 'X')) {
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ep = tmp;
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}
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}
|
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|
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if (endptr) {
|
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*endptr = ep;
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}
|
|
|
|
/* Turn "no conversion" into an error */
|
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if (libc_errno == 0 && ep == nptr) {
|
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return -EINVAL;
|
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}
|
|
|
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/* Fail when we're expected to consume the string, but didn't */
|
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if (!endptr && *ep) {
|
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return -EINVAL;
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}
|
|
|
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return -libc_errno;
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to an integer, and store it in @result.
|
|
*
|
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* This is a wrapper around strtol() that is harder to misuse.
|
|
* Semantics of @nptr, @endptr, @base match strtol() with differences
|
|
* noted below.
|
|
*
|
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* @nptr may be null, and no conversion is performed then.
|
|
*
|
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* If no conversion is performed, store @nptr in *@endptr and return
|
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* -EINVAL.
|
|
*
|
|
* If @endptr is null, and the string isn't fully converted, return
|
|
* -EINVAL. This is the case when the pointer that would be stored in
|
|
* a non-null @endptr points to a character other than '\0'.
|
|
*
|
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* If the conversion overflows @result, store INT_MAX in @result,
|
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* and return -ERANGE.
|
|
*
|
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* If the conversion underflows @result, store INT_MIN in @result,
|
|
* and return -ERANGE.
|
|
*
|
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* Else store the converted value in @result, and return zero.
|
|
*/
|
|
int qemu_strtoi(const char *nptr, const char **endptr, int base,
|
|
int *result)
|
|
{
|
|
char *ep;
|
|
long long lresult;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
errno = 0;
|
|
lresult = strtoll(nptr, &ep, base);
|
|
if (lresult < INT_MIN) {
|
|
*result = INT_MIN;
|
|
errno = ERANGE;
|
|
} else if (lresult > INT_MAX) {
|
|
*result = INT_MAX;
|
|
errno = ERANGE;
|
|
} else {
|
|
*result = lresult;
|
|
}
|
|
return check_strtox_error(nptr, ep, endptr, lresult == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to an unsigned integer, and store it in @result.
|
|
*
|
|
* This is a wrapper around strtoul() that is harder to misuse.
|
|
* Semantics of @nptr, @endptr, @base match strtoul() with differences
|
|
* noted below.
|
|
*
|
|
* @nptr may be null, and no conversion is performed then.
|
|
*
|
|
* If no conversion is performed, store @nptr in *@endptr and return
|
|
* -EINVAL.
|
|
*
|
|
* If @endptr is null, and the string isn't fully converted, return
|
|
* -EINVAL. This is the case when the pointer that would be stored in
|
|
* a non-null @endptr points to a character other than '\0'.
|
|
*
|
|
* If the conversion overflows @result, store UINT_MAX in @result,
|
|
* and return -ERANGE.
|
|
*
|
|
* Else store the converted value in @result, and return zero.
|
|
*
|
|
* Note that a number with a leading minus sign gets converted without
|
|
* the minus sign, checked for overflow (see above), then negated (in
|
|
* @result's type). This is exactly how strtoul() works.
|
|
*/
|
|
int qemu_strtoui(const char *nptr, const char **endptr, int base,
|
|
unsigned int *result)
|
|
{
|
|
char *ep;
|
|
long long lresult;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
errno = 0;
|
|
lresult = strtoull(nptr, &ep, base);
|
|
|
|
/* Windows returns 1 for negative out-of-range values. */
|
|
if (errno == ERANGE) {
|
|
*result = -1;
|
|
} else {
|
|
if (lresult > UINT_MAX) {
|
|
*result = UINT_MAX;
|
|
errno = ERANGE;
|
|
} else if (lresult < INT_MIN) {
|
|
*result = UINT_MAX;
|
|
errno = ERANGE;
|
|
} else {
|
|
*result = lresult;
|
|
}
|
|
}
|
|
return check_strtox_error(nptr, ep, endptr, lresult == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to a long integer, and store it in @result.
|
|
*
|
|
* This is a wrapper around strtol() that is harder to misuse.
|
|
* Semantics of @nptr, @endptr, @base match strtol() with differences
|
|
* noted below.
|
|
*
|
|
* @nptr may be null, and no conversion is performed then.
|
|
*
|
|
* If no conversion is performed, store @nptr in *@endptr and return
|
|
* -EINVAL.
|
|
*
|
|
* If @endptr is null, and the string isn't fully converted, return
|
|
* -EINVAL. This is the case when the pointer that would be stored in
|
|
* a non-null @endptr points to a character other than '\0'.
|
|
*
|
|
* If the conversion overflows @result, store LONG_MAX in @result,
|
|
* and return -ERANGE.
|
|
*
|
|
* If the conversion underflows @result, store LONG_MIN in @result,
|
|
* and return -ERANGE.
|
|
*
|
|
* Else store the converted value in @result, and return zero.
|
|
*/
|
|
int qemu_strtol(const char *nptr, const char **endptr, int base,
|
|
long *result)
|
|
{
|
|
char *ep;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
errno = 0;
|
|
*result = strtol(nptr, &ep, base);
|
|
return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to an unsigned long, and store it in @result.
|
|
*
|
|
* This is a wrapper around strtoul() that is harder to misuse.
|
|
* Semantics of @nptr, @endptr, @base match strtoul() with differences
|
|
* noted below.
|
|
*
|
|
* @nptr may be null, and no conversion is performed then.
|
|
*
|
|
* If no conversion is performed, store @nptr in *@endptr and return
|
|
* -EINVAL.
|
|
*
|
|
* If @endptr is null, and the string isn't fully converted, return
|
|
* -EINVAL. This is the case when the pointer that would be stored in
|
|
* a non-null @endptr points to a character other than '\0'.
|
|
*
|
|
* If the conversion overflows @result, store ULONG_MAX in @result,
|
|
* and return -ERANGE.
|
|
*
|
|
* Else store the converted value in @result, and return zero.
|
|
*
|
|
* Note that a number with a leading minus sign gets converted without
|
|
* the minus sign, checked for overflow (see above), then negated (in
|
|
* @result's type). This is exactly how strtoul() works.
|
|
*/
|
|
int qemu_strtoul(const char *nptr, const char **endptr, int base,
|
|
unsigned long *result)
|
|
{
|
|
char *ep;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
errno = 0;
|
|
*result = strtoul(nptr, &ep, base);
|
|
/* Windows returns 1 for negative out-of-range values. */
|
|
if (errno == ERANGE) {
|
|
*result = -1;
|
|
}
|
|
return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to an int64_t.
|
|
*
|
|
* Works like qemu_strtol(), except it stores INT64_MAX on overflow,
|
|
* and INT64_MIN on underflow.
|
|
*/
|
|
int qemu_strtoi64(const char *nptr, const char **endptr, int base,
|
|
int64_t *result)
|
|
{
|
|
char *ep;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* This assumes int64_t is long long TODO relax */
|
|
QEMU_BUILD_BUG_ON(sizeof(int64_t) != sizeof(long long));
|
|
errno = 0;
|
|
*result = strtoll(nptr, &ep, base);
|
|
return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to an uint64_t.
|
|
*
|
|
* Works like qemu_strtoul(), except it stores UINT64_MAX on overflow.
|
|
*/
|
|
int qemu_strtou64(const char *nptr, const char **endptr, int base,
|
|
uint64_t *result)
|
|
{
|
|
char *ep;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* This assumes uint64_t is unsigned long long TODO relax */
|
|
QEMU_BUILD_BUG_ON(sizeof(uint64_t) != sizeof(unsigned long long));
|
|
errno = 0;
|
|
*result = strtoull(nptr, &ep, base);
|
|
/* Windows returns 1 for negative out-of-range values. */
|
|
if (errno == ERANGE) {
|
|
*result = -1;
|
|
}
|
|
return check_strtox_error(nptr, ep, endptr, *result == 0, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to a double.
|
|
*
|
|
* This is a wrapper around strtod() that is harder to misuse.
|
|
* Semantics of @nptr and @endptr match strtod() with differences
|
|
* noted below.
|
|
*
|
|
* @nptr may be null, and no conversion is performed then.
|
|
*
|
|
* If no conversion is performed, store @nptr in *@endptr and return
|
|
* -EINVAL.
|
|
*
|
|
* If @endptr is null, and the string isn't fully converted, return
|
|
* -EINVAL. This is the case when the pointer that would be stored in
|
|
* a non-null @endptr points to a character other than '\0'.
|
|
*
|
|
* If the conversion overflows, store +/-HUGE_VAL in @result, depending
|
|
* on the sign, and return -ERANGE.
|
|
*
|
|
* If the conversion underflows, store +/-0.0 in @result, depending on the
|
|
* sign, and return -ERANGE.
|
|
*
|
|
* Else store the converted value in @result, and return zero.
|
|
*/
|
|
int qemu_strtod(const char *nptr, const char **endptr, double *result)
|
|
{
|
|
char *ep;
|
|
|
|
if (!nptr) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
errno = 0;
|
|
*result = strtod(nptr, &ep);
|
|
return check_strtox_error(nptr, ep, endptr, false, errno);
|
|
}
|
|
|
|
/**
|
|
* Convert string @nptr to a finite double.
|
|
*
|
|
* Works like qemu_strtod(), except that "NaN" and "inf" are rejected
|
|
* with -EINVAL and no conversion is performed.
|
|
*/
|
|
int qemu_strtod_finite(const char *nptr, const char **endptr, double *result)
|
|
{
|
|
double tmp;
|
|
int ret;
|
|
|
|
ret = qemu_strtod(nptr, endptr, &tmp);
|
|
if (!ret && !isfinite(tmp)) {
|
|
if (endptr) {
|
|
*endptr = nptr;
|
|
}
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
if (ret != -EINVAL) {
|
|
*result = tmp;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Searches for the first occurrence of 'c' in 's', and returns a pointer
|
|
* to the trailing null byte if none was found.
|
|
*/
|
|
#ifndef HAVE_STRCHRNUL
|
|
const char *qemu_strchrnul(const char *s, int c)
|
|
{
|
|
const char *e = strchr(s, c);
|
|
if (!e) {
|
|
e = s + strlen(s);
|
|
}
|
|
return e;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* parse_uint:
|
|
*
|
|
* @s: String to parse
|
|
* @value: Destination for parsed integer value
|
|
* @endptr: Destination for pointer to first character not consumed
|
|
* @base: integer base, between 2 and 36 inclusive, or 0
|
|
*
|
|
* Parse unsigned integer
|
|
*
|
|
* Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional
|
|
* '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits.
|
|
*
|
|
* If @s is null, or @base is invalid, or @s doesn't start with an
|
|
* integer in the syntax above, set *@value to 0, *@endptr to @s, and
|
|
* return -EINVAL.
|
|
*
|
|
* Set *@endptr to point right beyond the parsed integer (even if the integer
|
|
* overflows or is negative, all digits will be parsed and *@endptr will
|
|
* point right beyond them).
|
|
*
|
|
* If the integer is negative, set *@value to 0, and return -ERANGE.
|
|
*
|
|
* 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;
|
|
|
|
assert((unsigned) base <= 36 && base != 1);
|
|
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 (qemu_isspace(*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) {
|
|
warn_report("%s not in [0, %d]", name, max);
|
|
return initial;
|
|
}
|
|
return debug;
|
|
}
|
|
|
|
/*
|
|
* Return human readable string for size @val.
|
|
* @val can be anything that uint64_t allows (no more than "16 EiB").
|
|
* Use IEC binary units like KiB, MiB, and so forth.
|
|
* Caller is responsible for passing it to g_free().
|
|
*/
|
|
char *size_to_str(uint64_t val)
|
|
{
|
|
static const char *suffixes[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei" };
|
|
uint64_t div;
|
|
int i;
|
|
|
|
/*
|
|
* The exponent (returned in i) minus one gives us
|
|
* floor(log2(val * 1024 / 1000). The correction makes us
|
|
* switch to the higher power when the integer part is >= 1000.
|
|
* (see e41b509d68afb1f for more info)
|
|
*/
|
|
frexp(val / (1000.0 / 1024.0), &i);
|
|
i = (i - 1) / 10;
|
|
div = 1ULL << (i * 10);
|
|
|
|
return g_strdup_printf("%0.3g %sB", (double)val / div, suffixes[i]);
|
|
}
|
|
|
|
char *freq_to_str(uint64_t freq_hz)
|
|
{
|
|
static const char *const suffixes[] = { "", "K", "M", "G", "T", "P", "E" };
|
|
double freq = freq_hz;
|
|
size_t idx = 0;
|
|
|
|
while (freq >= 1000.0) {
|
|
freq /= 1000.0;
|
|
idx++;
|
|
}
|
|
assert(idx < ARRAY_SIZE(suffixes));
|
|
|
|
return g_strdup_printf("%0.3g %sHz", freq, suffixes[idx]);
|
|
}
|
|
|
|
int qemu_pstrcmp0(const char **str1, const char **str2)
|
|
{
|
|
return g_strcmp0(*str1, *str2);
|
|
}
|
|
|
|
static inline bool starts_with_prefix(const char *dir)
|
|
{
|
|
size_t prefix_len = strlen(CONFIG_PREFIX);
|
|
return !memcmp(dir, CONFIG_PREFIX, prefix_len) &&
|
|
(!dir[prefix_len] || G_IS_DIR_SEPARATOR(dir[prefix_len]));
|
|
}
|
|
|
|
/* Return the next path component in dir, and store its length in *p_len. */
|
|
static inline const char *next_component(const char *dir, int *p_len)
|
|
{
|
|
int len;
|
|
while ((*dir && G_IS_DIR_SEPARATOR(*dir)) ||
|
|
(*dir == '.' && (G_IS_DIR_SEPARATOR(dir[1]) || dir[1] == '\0'))) {
|
|
dir++;
|
|
}
|
|
len = 0;
|
|
while (dir[len] && !G_IS_DIR_SEPARATOR(dir[len])) {
|
|
len++;
|
|
}
|
|
*p_len = len;
|
|
return dir;
|
|
}
|
|
|
|
char *get_relocated_path(const char *dir)
|
|
{
|
|
size_t prefix_len = strlen(CONFIG_PREFIX);
|
|
const char *bindir = CONFIG_BINDIR;
|
|
const char *exec_dir = qemu_get_exec_dir();
|
|
GString *result;
|
|
int len_dir, len_bindir;
|
|
|
|
/* Fail if qemu_init_exec_dir was not called. */
|
|
assert(exec_dir[0]);
|
|
if (!starts_with_prefix(dir) || !starts_with_prefix(bindir)) {
|
|
return g_strdup(dir);
|
|
}
|
|
|
|
result = g_string_new(exec_dir);
|
|
|
|
/* Advance over common components. */
|
|
len_dir = len_bindir = prefix_len;
|
|
do {
|
|
dir += len_dir;
|
|
bindir += len_bindir;
|
|
dir = next_component(dir, &len_dir);
|
|
bindir = next_component(bindir, &len_bindir);
|
|
} while (len_dir && len_dir == len_bindir && !memcmp(dir, bindir, len_dir));
|
|
|
|
/* Ascend from bindir to the common prefix with dir. */
|
|
while (len_bindir) {
|
|
bindir += len_bindir;
|
|
g_string_append(result, "/..");
|
|
bindir = next_component(bindir, &len_bindir);
|
|
}
|
|
|
|
if (*dir) {
|
|
assert(G_IS_DIR_SEPARATOR(dir[-1]));
|
|
g_string_append(result, dir - 1);
|
|
}
|
|
return g_string_free(result, false);
|
|
}
|