diff options
author | Paolo Bonzini <pbonzini@redhat.com> | 2012-12-20 15:58:44 +0100 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-01-12 18:42:50 +0100 |
commit | baacf04799ace72a9c735dd9306a1ceaf305e7cf (patch) | |
tree | 5e6750afe4b31c4343f9dd4bc07827cbdcb51466 /cutils.c | |
parent | f157ebba2de4a6225679e13cc1ce01ff5d147c76 (diff) |
build: move libqemuutil.a components to util/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'cutils.c')
-rw-r--r-- | cutils.c | 325 |
1 files changed, 0 insertions, 325 deletions
diff --git a/cutils.c b/cutils.c deleted file mode 100644 index 80bb1dcbf7..0000000000 --- a/cutils.c +++ /dev/null @@ -1,325 +0,0 @@ -/* - * Simple C functions to supplement the C library - * - * Copyright (c) 2006 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "qemu-common.h" -#include "qemu/host-utils.h" -#include <math.h> - -#include "qemu/sockets.h" -#include "qemu/iov.h" - -void strpadcpy(char *buf, int buf_size, const char *str, char pad) -{ - int len = qemu_strnlen(str, buf_size); - memcpy(buf, str, len); - memset(buf + len, pad, buf_size - len); -} - -void pstrcpy(char *buf, int buf_size, const char *str) -{ - int c; - char *q = buf; - - if (buf_size <= 0) - return; - - for(;;) { - c = *str++; - if (c == 0 || q >= buf + buf_size - 1) - break; - *q++ = c; - } - *q = '\0'; -} - -/* strcat and truncate. */ -char *pstrcat(char *buf, int buf_size, const char *s) -{ - int len; - len = strlen(buf); - if (len < buf_size) - pstrcpy(buf + len, buf_size - len, s); - return buf; -} - -int strstart(const char *str, const char *val, const char **ptr) -{ - const char *p, *q; - p = str; - q = val; - while (*q != '\0') { - if (*p != *q) - return 0; - p++; - q++; - } - if (ptr) - *ptr = p; - return 1; -} - -int stristart(const char *str, const char *val, const char **ptr) -{ - const char *p, *q; - p = str; - q = val; - while (*q != '\0') { - if (qemu_toupper(*p) != qemu_toupper(*q)) - return 0; - p++; - q++; - } - if (ptr) - *ptr = p; - return 1; -} - -/* XXX: use host strnlen if available ? */ -int qemu_strnlen(const char *s, int max_len) -{ - int i; - - for(i = 0; i < max_len; i++) { - if (s[i] == '\0') { - break; - } - } - return i; -} - -time_t mktimegm(struct tm *tm) -{ - time_t t; - int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday; - if (m < 3) { - m += 12; - y--; - } - t = 86400ULL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + - y / 400 - 719469); - t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec; - return t; -} - -int qemu_fls(int i) -{ - return 32 - clz32(i); -} - -/* - * Make sure data goes on disk, but if possible do not bother to - * write out the inode just for timestamp updates. - * - * Unfortunately even in 2009 many operating systems do not support - * fdatasync and have to fall back to fsync. - */ -int qemu_fdatasync(int fd) -{ -#ifdef CONFIG_FDATASYNC - return fdatasync(fd); -#else - return fsync(fd); -#endif -} - -/* - * Checks if a buffer is all zeroes - * - * Attention! The len must be a multiple of 4 * sizeof(long) due to - * restriction of optimizations in this function. - */ -bool buffer_is_zero(const void *buf, size_t len) -{ - /* - * Use long as the biggest available internal data type that fits into the - * CPU register and unroll the loop to smooth out the effect of memory - * latency. - */ - - size_t i; - long d0, d1, d2, d3; - const long * const data = buf; - - assert(len % (4 * sizeof(long)) == 0); - len /= sizeof(long); - - for (i = 0; i < len; i += 4) { - d0 = data[i + 0]; - d1 = data[i + 1]; - d2 = data[i + 2]; - d3 = data[i + 3]; - - if (d0 || d1 || d2 || d3) { - return false; - } - } - - return true; -} - -#ifndef _WIN32 -/* Sets a specific flag */ -int fcntl_setfl(int fd, int flag) -{ - int flags; - - flags = fcntl(fd, F_GETFL); - if (flags == -1) - return -errno; - - if (fcntl(fd, F_SETFL, flags | flag) == -1) - return -errno; - - return 0; -} -#endif - -static int64_t suffix_mul(char suffix, int64_t unit) -{ - switch (qemu_toupper(suffix)) { - case STRTOSZ_DEFSUFFIX_B: - return 1; - case STRTOSZ_DEFSUFFIX_KB: - return unit; - case STRTOSZ_DEFSUFFIX_MB: - return unit * unit; - case STRTOSZ_DEFSUFFIX_GB: - return unit * unit * unit; - case STRTOSZ_DEFSUFFIX_TB: - return unit * unit * unit * unit; - } - return -1; -} - -/* - * Convert string to bytes, allowing either B/b for bytes, K/k for KB, - * M/m for MB, G/g for GB or T/t for TB. End pointer will be returned - * in *end, if not NULL. Return -ERANGE on overflow, Return -EINVAL on - * other error. - */ -int64_t strtosz_suffix_unit(const char *nptr, char **end, - const char default_suffix, int64_t unit) -{ - int64_t retval = -EINVAL; - char *endptr; - unsigned char c; - int mul_required = 0; - double val, mul, integral, fraction; - - errno = 0; - val = strtod(nptr, &endptr); - if (isnan(val) || endptr == nptr || errno != 0) { - goto fail; - } - fraction = modf(val, &integral); - if (fraction != 0) { - mul_required = 1; - } - c = *endptr; - mul = suffix_mul(c, unit); - if (mul >= 0) { - endptr++; - } else { - mul = suffix_mul(default_suffix, unit); - assert(mul >= 0); - } - if (mul == 1 && mul_required) { - goto fail; - } - if ((val * mul >= INT64_MAX) || val < 0) { - retval = -ERANGE; - goto fail; - } - retval = val * mul; - -fail: - if (end) { - *end = endptr; - } - - return retval; -} - -int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix) -{ - return strtosz_suffix_unit(nptr, end, default_suffix, 1024); -} - -int64_t strtosz(const char *nptr, char **end) -{ - return strtosz_suffix(nptr, end, STRTOSZ_DEFSUFFIX_MB); -} - -int qemu_parse_fd(const char *param) -{ - int fd; - char *endptr = NULL; - - fd = strtol(param, &endptr, 10); - if (*endptr || (fd == 0 && param == endptr)) { - return -1; - } - return fd; -} - -/* round down to the nearest power of 2*/ -int64_t pow2floor(int64_t value) -{ - if (!is_power_of_2(value)) { - value = 0x8000000000000000ULL >> clz64(value); - } - return value; -} - -/* - * 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; - } -} |