cleanup qemu/util code
This commit is contained in:
Nguyen Anh Quynh
@ -28,13 +28,6 @@
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#include <errno.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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@ -78,108 +71,11 @@ int strstart(const char *str, const char *val, const char **ptr)
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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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int qemu_fls(int i)
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{
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return 32 - clz32(i);
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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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#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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@ -259,161 +155,3 @@ int64_t strtosz(const char *nptr, char **end)
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{
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return strtosz_suffix(nptr, end, STRTOSZ_DEFSUFFIX_MB);
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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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*
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* If the integer overflows unsigned long long, set *@value to
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* ULLONG_MAX, and return -ERANGE.
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*
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* Else, set *@value to the parsed integer, and return 0.
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*/
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int parse_uint(const char *s, unsigned long long *value, char **endptr,
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int base)
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{
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int r = 0;
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char *endp = (char *)s;
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unsigned long long val = 0;
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if (!s) {
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r = -EINVAL;
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goto out;
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}
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errno = 0;
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val = strtoull(s, &endp, base);
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if (errno) {
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r = -errno;
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goto out;
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}
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if (endp == s) {
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r = -EINVAL;
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goto out;
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}
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/* make sure we reject negative numbers: */
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while (isspace((unsigned char)*s)) {
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s++;
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}
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if (*s == '-') {
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val = 0;
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r = -ERANGE;
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goto out;
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}
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out:
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*value = val;
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*endptr = endp;
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return r;
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}
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/**
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* parse_uint_full:
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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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* @base: integer base, between 2 and 36 inclusive, or 0
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*
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* Parse unsigned integer from entire string
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*
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* Have the same behavior of parse_uint(), but with an additional check
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* for additional data after the parsed number. If extra characters are present
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* after the parsed number, the function will return -EINVAL, and *@v will
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* be set to 0.
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*/
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int parse_uint_full(const char *s, unsigned long long *value, int base)
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{
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char *endp;
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int r;
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r = parse_uint(s, value, &endp, base);
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if (r < 0) {
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return r;
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}
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if (*endp) {
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*value = 0;
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return -EINVAL;
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}
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return 0;
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}
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int qemu_parse_fd(const char *param)
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{
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long fd;
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char *endptr;
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errno = 0;
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fd = strtol(param, &endptr, 10);
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if (param == endptr /* no conversion performed */ ||
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errno != 0 /* not representable as long; possibly others */ ||
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*endptr != '\0' /* final string not empty */ ||
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fd < 0 /* invalid as file descriptor */ ||
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fd > INT_MAX /* not representable as int */) {
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return -1;
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}
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return fd;
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}
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/* round down to the nearest power of 2*/
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int64_t pow2floor(int64_t value)
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{
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if (!is_power_of_2(value)) {
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value = 0x8000000000000000ULL >> clz64(value);
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}
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return value;
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}
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/*
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* Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
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* Input is limited to 14-bit numbers
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*/
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int uleb128_encode_small(uint8_t *out, uint32_t n)
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{
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g_assert(n <= 0x3fff);
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if (n < 0x80) {
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*out++ = n;
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return 1;
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} else {
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*out++ = (n & 0x7f) | 0x80;
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*out++ = n >> 7;
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return 2;
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}
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}
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int uleb128_decode_small(const uint8_t *in, uint32_t *n)
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{
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if (!(*in & 0x80)) {
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*n = *in++;
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return 1;
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} else {
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*n = *in++ & 0x7f;
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/* we exceed 14 bit number */
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if (*in & 0x80) {
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return -1;
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}
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*n |= *in++ << 7;
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return 2;
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}
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}
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