1baacf047SPaolo Bonzini /* 2baacf047SPaolo Bonzini * Simple C functions to supplement the C library 3baacf047SPaolo Bonzini * 4baacf047SPaolo Bonzini * Copyright (c) 2006 Fabrice Bellard 5baacf047SPaolo Bonzini * 6baacf047SPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy 7baacf047SPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal 8baacf047SPaolo Bonzini * in the Software without restriction, including without limitation the rights 9baacf047SPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10baacf047SPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is 11baacf047SPaolo Bonzini * furnished to do so, subject to the following conditions: 12baacf047SPaolo Bonzini * 13baacf047SPaolo Bonzini * The above copyright notice and this permission notice shall be included in 14baacf047SPaolo Bonzini * all copies or substantial portions of the Software. 15baacf047SPaolo Bonzini * 16baacf047SPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17baacf047SPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18baacf047SPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19baacf047SPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20baacf047SPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21baacf047SPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22baacf047SPaolo Bonzini * THE SOFTWARE. 23baacf047SPaolo Bonzini */ 24856dfd8aSMarkus Armbruster 25aafd7584SPeter Maydell #include "qemu/osdep.h" 26baacf047SPaolo Bonzini #include "qemu/host-utils.h" 27baacf047SPaolo Bonzini #include <math.h> 28baacf047SPaolo Bonzini 29a8d25326SMarkus Armbruster #include "qemu-common.h" 30baacf047SPaolo Bonzini #include "qemu/sockets.h" 31baacf047SPaolo Bonzini #include "qemu/iov.h" 324297c8eeSAlexey Kardashevskiy #include "net/net.h" 33856dfd8aSMarkus Armbruster #include "qemu/ctype.h" 34f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 3505cb8ed5SAlistair Francis #include "qemu/error-report.h" 36baacf047SPaolo Bonzini 37baacf047SPaolo Bonzini void strpadcpy(char *buf, int buf_size, const char *str, char pad) 38baacf047SPaolo Bonzini { 39baacf047SPaolo Bonzini int len = qemu_strnlen(str, buf_size); 40baacf047SPaolo Bonzini memcpy(buf, str, len); 41baacf047SPaolo Bonzini memset(buf + len, pad, buf_size - len); 42baacf047SPaolo Bonzini } 43baacf047SPaolo Bonzini 44baacf047SPaolo Bonzini void pstrcpy(char *buf, int buf_size, const char *str) 45baacf047SPaolo Bonzini { 46baacf047SPaolo Bonzini int c; 47baacf047SPaolo Bonzini char *q = buf; 48baacf047SPaolo Bonzini 49baacf047SPaolo Bonzini if (buf_size <= 0) 50baacf047SPaolo Bonzini return; 51baacf047SPaolo Bonzini 52baacf047SPaolo Bonzini for(;;) { 53baacf047SPaolo Bonzini c = *str++; 54baacf047SPaolo Bonzini if (c == 0 || q >= buf + buf_size - 1) 55baacf047SPaolo Bonzini break; 56baacf047SPaolo Bonzini *q++ = c; 57baacf047SPaolo Bonzini } 58baacf047SPaolo Bonzini *q = '\0'; 59baacf047SPaolo Bonzini } 60baacf047SPaolo Bonzini 61baacf047SPaolo Bonzini /* strcat and truncate. */ 62baacf047SPaolo Bonzini char *pstrcat(char *buf, int buf_size, const char *s) 63baacf047SPaolo Bonzini { 64baacf047SPaolo Bonzini int len; 65baacf047SPaolo Bonzini len = strlen(buf); 66baacf047SPaolo Bonzini if (len < buf_size) 67baacf047SPaolo Bonzini pstrcpy(buf + len, buf_size - len, s); 68baacf047SPaolo Bonzini return buf; 69baacf047SPaolo Bonzini } 70baacf047SPaolo Bonzini 71baacf047SPaolo Bonzini int strstart(const char *str, const char *val, const char **ptr) 72baacf047SPaolo Bonzini { 73baacf047SPaolo Bonzini const char *p, *q; 74baacf047SPaolo Bonzini p = str; 75baacf047SPaolo Bonzini q = val; 76baacf047SPaolo Bonzini while (*q != '\0') { 77baacf047SPaolo Bonzini if (*p != *q) 78baacf047SPaolo Bonzini return 0; 79baacf047SPaolo Bonzini p++; 80baacf047SPaolo Bonzini q++; 81baacf047SPaolo Bonzini } 82baacf047SPaolo Bonzini if (ptr) 83baacf047SPaolo Bonzini *ptr = p; 84baacf047SPaolo Bonzini return 1; 85baacf047SPaolo Bonzini } 86baacf047SPaolo Bonzini 87baacf047SPaolo Bonzini int stristart(const char *str, const char *val, const char **ptr) 88baacf047SPaolo Bonzini { 89baacf047SPaolo Bonzini const char *p, *q; 90baacf047SPaolo Bonzini p = str; 91baacf047SPaolo Bonzini q = val; 92baacf047SPaolo Bonzini while (*q != '\0') { 93baacf047SPaolo Bonzini if (qemu_toupper(*p) != qemu_toupper(*q)) 94baacf047SPaolo Bonzini return 0; 95baacf047SPaolo Bonzini p++; 96baacf047SPaolo Bonzini q++; 97baacf047SPaolo Bonzini } 98baacf047SPaolo Bonzini if (ptr) 99baacf047SPaolo Bonzini *ptr = p; 100baacf047SPaolo Bonzini return 1; 101baacf047SPaolo Bonzini } 102baacf047SPaolo Bonzini 103baacf047SPaolo Bonzini /* XXX: use host strnlen if available ? */ 104baacf047SPaolo Bonzini int qemu_strnlen(const char *s, int max_len) 105baacf047SPaolo Bonzini { 106baacf047SPaolo Bonzini int i; 107baacf047SPaolo Bonzini 108baacf047SPaolo Bonzini for(i = 0; i < max_len; i++) { 109baacf047SPaolo Bonzini if (s[i] == '\0') { 110baacf047SPaolo Bonzini break; 111baacf047SPaolo Bonzini } 112baacf047SPaolo Bonzini } 113baacf047SPaolo Bonzini return i; 114baacf047SPaolo Bonzini } 115baacf047SPaolo Bonzini 116a38ed811SKevin Wolf char *qemu_strsep(char **input, const char *delim) 117a38ed811SKevin Wolf { 118a38ed811SKevin Wolf char *result = *input; 119a38ed811SKevin Wolf if (result != NULL) { 120a38ed811SKevin Wolf char *p; 121a38ed811SKevin Wolf 122a38ed811SKevin Wolf for (p = result; *p != '\0'; p++) { 123a38ed811SKevin Wolf if (strchr(delim, *p)) { 124a38ed811SKevin Wolf break; 125a38ed811SKevin Wolf } 126a38ed811SKevin Wolf } 127a38ed811SKevin Wolf if (*p == '\0') { 128a38ed811SKevin Wolf *input = NULL; 129a38ed811SKevin Wolf } else { 130a38ed811SKevin Wolf *p = '\0'; 131a38ed811SKevin Wolf *input = p + 1; 132a38ed811SKevin Wolf } 133a38ed811SKevin Wolf } 134a38ed811SKevin Wolf return result; 135a38ed811SKevin Wolf } 136a38ed811SKevin Wolf 137baacf047SPaolo Bonzini time_t mktimegm(struct tm *tm) 138baacf047SPaolo Bonzini { 139baacf047SPaolo Bonzini time_t t; 140baacf047SPaolo Bonzini int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday; 141baacf047SPaolo Bonzini if (m < 3) { 142baacf047SPaolo Bonzini m += 12; 143baacf047SPaolo Bonzini y--; 144baacf047SPaolo Bonzini } 145baacf047SPaolo Bonzini t = 86400ULL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 146baacf047SPaolo Bonzini y / 400 - 719469); 147baacf047SPaolo Bonzini t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec; 148baacf047SPaolo Bonzini return t; 149baacf047SPaolo Bonzini } 150baacf047SPaolo Bonzini 151baacf047SPaolo Bonzini /* 152baacf047SPaolo Bonzini * Make sure data goes on disk, but if possible do not bother to 153baacf047SPaolo Bonzini * write out the inode just for timestamp updates. 154baacf047SPaolo Bonzini * 155baacf047SPaolo Bonzini * Unfortunately even in 2009 many operating systems do not support 156baacf047SPaolo Bonzini * fdatasync and have to fall back to fsync. 157baacf047SPaolo Bonzini */ 158baacf047SPaolo Bonzini int qemu_fdatasync(int fd) 159baacf047SPaolo Bonzini { 160baacf047SPaolo Bonzini #ifdef CONFIG_FDATASYNC 161baacf047SPaolo Bonzini return fdatasync(fd); 162baacf047SPaolo Bonzini #else 163baacf047SPaolo Bonzini return fsync(fd); 164baacf047SPaolo Bonzini #endif 165baacf047SPaolo Bonzini } 166baacf047SPaolo Bonzini 167baacf047SPaolo Bonzini #ifndef _WIN32 168baacf047SPaolo Bonzini /* Sets a specific flag */ 169baacf047SPaolo Bonzini int fcntl_setfl(int fd, int flag) 170baacf047SPaolo Bonzini { 171baacf047SPaolo Bonzini int flags; 172baacf047SPaolo Bonzini 173baacf047SPaolo Bonzini flags = fcntl(fd, F_GETFL); 174baacf047SPaolo Bonzini if (flags == -1) 175baacf047SPaolo Bonzini return -errno; 176baacf047SPaolo Bonzini 177baacf047SPaolo Bonzini if (fcntl(fd, F_SETFL, flags | flag) == -1) 178baacf047SPaolo Bonzini return -errno; 179baacf047SPaolo Bonzini 180baacf047SPaolo Bonzini return 0; 181baacf047SPaolo Bonzini } 182baacf047SPaolo Bonzini #endif 183baacf047SPaolo Bonzini 184baacf047SPaolo Bonzini static int64_t suffix_mul(char suffix, int64_t unit) 185baacf047SPaolo Bonzini { 186baacf047SPaolo Bonzini switch (qemu_toupper(suffix)) { 18717f94256SMarkus Armbruster case 'B': 188baacf047SPaolo Bonzini return 1; 18917f94256SMarkus Armbruster case 'K': 190baacf047SPaolo Bonzini return unit; 19117f94256SMarkus Armbruster case 'M': 192baacf047SPaolo Bonzini return unit * unit; 19317f94256SMarkus Armbruster case 'G': 194baacf047SPaolo Bonzini return unit * unit * unit; 19517f94256SMarkus Armbruster case 'T': 196baacf047SPaolo Bonzini return unit * unit * unit * unit; 19717f94256SMarkus Armbruster case 'P': 1985e00984aSKevin Wolf return unit * unit * unit * unit * unit; 19917f94256SMarkus Armbruster case 'E': 2005e00984aSKevin Wolf return unit * unit * unit * unit * unit * unit; 201baacf047SPaolo Bonzini } 202baacf047SPaolo Bonzini return -1; 203baacf047SPaolo Bonzini } 204baacf047SPaolo Bonzini 205baacf047SPaolo Bonzini /* 206baacf047SPaolo Bonzini * Convert string to bytes, allowing either B/b for bytes, K/k for KB, 207baacf047SPaolo Bonzini * M/m for MB, G/g for GB or T/t for TB. End pointer will be returned 208af02f4c5SDavid Hildenbrand * in *end, if not NULL. Return -ERANGE on overflow, and -EINVAL on 209baacf047SPaolo Bonzini * other error. 210baacf047SPaolo Bonzini */ 211af02f4c5SDavid Hildenbrand static int do_strtosz(const char *nptr, const char **end, 212f17fd4fdSMarkus Armbruster const char default_suffix, int64_t unit, 213f46bfdbfSMarkus Armbruster uint64_t *result) 214baacf047SPaolo Bonzini { 215f17fd4fdSMarkus Armbruster int retval; 216af02f4c5SDavid Hildenbrand const char *endptr; 217baacf047SPaolo Bonzini unsigned char c; 218baacf047SPaolo Bonzini int mul_required = 0; 219baacf047SPaolo Bonzini double val, mul, integral, fraction; 220baacf047SPaolo Bonzini 221af02f4c5SDavid Hildenbrand retval = qemu_strtod_finite(nptr, &endptr, &val); 222af02f4c5SDavid Hildenbrand if (retval) { 2234fcdf65aSMarkus Armbruster goto out; 224baacf047SPaolo Bonzini } 225baacf047SPaolo Bonzini fraction = modf(val, &integral); 226baacf047SPaolo Bonzini if (fraction != 0) { 227baacf047SPaolo Bonzini mul_required = 1; 228baacf047SPaolo Bonzini } 229baacf047SPaolo Bonzini c = *endptr; 230baacf047SPaolo Bonzini mul = suffix_mul(c, unit); 231baacf047SPaolo Bonzini if (mul >= 0) { 232baacf047SPaolo Bonzini endptr++; 233baacf047SPaolo Bonzini } else { 234baacf047SPaolo Bonzini mul = suffix_mul(default_suffix, unit); 235baacf047SPaolo Bonzini assert(mul >= 0); 236baacf047SPaolo Bonzini } 237baacf047SPaolo Bonzini if (mul == 1 && mul_required) { 2384fcdf65aSMarkus Armbruster retval = -EINVAL; 2394fcdf65aSMarkus Armbruster goto out; 240baacf047SPaolo Bonzini } 241f46bfdbfSMarkus Armbruster /* 242*25f74087SFangrui Song * Values near UINT64_MAX overflow to 2**64 when converting to double 243*25f74087SFangrui Song * precision. Compare against the maximum representable double precision 244*25f74087SFangrui Song * value below 2**64, computed as "the next value after 2**64 (0x1p64) in 245*25f74087SFangrui Song * the direction of 0". 246f46bfdbfSMarkus Armbruster */ 247*25f74087SFangrui Song if ((val * mul > nextafter(0x1p64, 0)) || val < 0) { 248baacf047SPaolo Bonzini retval = -ERANGE; 2494fcdf65aSMarkus Armbruster goto out; 250baacf047SPaolo Bonzini } 251f17fd4fdSMarkus Armbruster *result = val * mul; 252f17fd4fdSMarkus Armbruster retval = 0; 253baacf047SPaolo Bonzini 2544fcdf65aSMarkus Armbruster out: 255baacf047SPaolo Bonzini if (end) { 256baacf047SPaolo Bonzini *end = endptr; 2574fcdf65aSMarkus Armbruster } else if (*endptr) { 2584fcdf65aSMarkus Armbruster retval = -EINVAL; 259baacf047SPaolo Bonzini } 260baacf047SPaolo Bonzini 261baacf047SPaolo Bonzini return retval; 262baacf047SPaolo Bonzini } 263baacf047SPaolo Bonzini 264af02f4c5SDavid Hildenbrand int qemu_strtosz(const char *nptr, const char **end, uint64_t *result) 265baacf047SPaolo Bonzini { 266f17fd4fdSMarkus Armbruster return do_strtosz(nptr, end, 'B', 1024, result); 267baacf047SPaolo Bonzini } 268baacf047SPaolo Bonzini 269af02f4c5SDavid Hildenbrand int qemu_strtosz_MiB(const char *nptr, const char **end, uint64_t *result) 270baacf047SPaolo Bonzini { 271f17fd4fdSMarkus Armbruster return do_strtosz(nptr, end, 'M', 1024, result); 272baacf047SPaolo Bonzini } 273baacf047SPaolo Bonzini 274af02f4c5SDavid Hildenbrand int qemu_strtosz_metric(const char *nptr, const char **end, uint64_t *result) 275d2734d26SMarkus Armbruster { 276f17fd4fdSMarkus Armbruster return do_strtosz(nptr, end, 'B', 1000, result); 277d2734d26SMarkus Armbruster } 278d2734d26SMarkus Armbruster 279e3f9fe2dSEduardo Habkost /** 280717adf96SMarkus Armbruster * Helper function for error checking after strtol() and the like 281764e0fa4SCarlos L. Torres */ 282717adf96SMarkus Armbruster static int check_strtox_error(const char *nptr, char *ep, 283717adf96SMarkus Armbruster const char **endptr, int libc_errno) 284764e0fa4SCarlos L. Torres { 28553a90b97SEric Blake assert(ep >= nptr); 286717adf96SMarkus Armbruster if (endptr) { 287717adf96SMarkus Armbruster *endptr = ep; 288764e0fa4SCarlos L. Torres } 2894baef267SMarkus Armbruster 2904baef267SMarkus Armbruster /* Turn "no conversion" into an error */ 2914baef267SMarkus Armbruster if (libc_errno == 0 && ep == nptr) { 2924baef267SMarkus Armbruster return -EINVAL; 2934baef267SMarkus Armbruster } 2944baef267SMarkus Armbruster 2954baef267SMarkus Armbruster /* Fail when we're expected to consume the string, but didn't */ 2964baef267SMarkus Armbruster if (!endptr && *ep) { 2974baef267SMarkus Armbruster return -EINVAL; 2984baef267SMarkus Armbruster } 2994baef267SMarkus Armbruster 300717adf96SMarkus Armbruster return -libc_errno; 301764e0fa4SCarlos L. Torres } 302764e0fa4SCarlos L. Torres 303764e0fa4SCarlos L. Torres /** 304473a2a33SDaniel P. Berrange * Convert string @nptr to an integer, and store it in @result. 305473a2a33SDaniel P. Berrange * 306473a2a33SDaniel P. Berrange * This is a wrapper around strtol() that is harder to misuse. 307473a2a33SDaniel P. Berrange * Semantics of @nptr, @endptr, @base match strtol() with differences 308473a2a33SDaniel P. Berrange * noted below. 309473a2a33SDaniel P. Berrange * 310473a2a33SDaniel P. Berrange * @nptr may be null, and no conversion is performed then. 311473a2a33SDaniel P. Berrange * 312473a2a33SDaniel P. Berrange * If no conversion is performed, store @nptr in *@endptr and return 313473a2a33SDaniel P. Berrange * -EINVAL. 314473a2a33SDaniel P. Berrange * 315473a2a33SDaniel P. Berrange * If @endptr is null, and the string isn't fully converted, return 316473a2a33SDaniel P. Berrange * -EINVAL. This is the case when the pointer that would be stored in 317473a2a33SDaniel P. Berrange * a non-null @endptr points to a character other than '\0'. 318473a2a33SDaniel P. Berrange * 319473a2a33SDaniel P. Berrange * If the conversion overflows @result, store INT_MAX in @result, 320473a2a33SDaniel P. Berrange * and return -ERANGE. 321473a2a33SDaniel P. Berrange * 322473a2a33SDaniel P. Berrange * If the conversion underflows @result, store INT_MIN in @result, 323473a2a33SDaniel P. Berrange * and return -ERANGE. 324473a2a33SDaniel P. Berrange * 325473a2a33SDaniel P. Berrange * Else store the converted value in @result, and return zero. 326473a2a33SDaniel P. Berrange */ 327473a2a33SDaniel P. Berrange int qemu_strtoi(const char *nptr, const char **endptr, int base, 328473a2a33SDaniel P. Berrange int *result) 329473a2a33SDaniel P. Berrange { 330473a2a33SDaniel P. Berrange char *ep; 331473a2a33SDaniel P. Berrange long long lresult; 332473a2a33SDaniel P. Berrange 33353a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 334473a2a33SDaniel P. Berrange if (!nptr) { 335473a2a33SDaniel P. Berrange if (endptr) { 336473a2a33SDaniel P. Berrange *endptr = nptr; 337473a2a33SDaniel P. Berrange } 338473a2a33SDaniel P. Berrange return -EINVAL; 339473a2a33SDaniel P. Berrange } 340473a2a33SDaniel P. Berrange 341473a2a33SDaniel P. Berrange errno = 0; 342473a2a33SDaniel P. Berrange lresult = strtoll(nptr, &ep, base); 343473a2a33SDaniel P. Berrange if (lresult < INT_MIN) { 344473a2a33SDaniel P. Berrange *result = INT_MIN; 345473a2a33SDaniel P. Berrange errno = ERANGE; 346473a2a33SDaniel P. Berrange } else if (lresult > INT_MAX) { 347473a2a33SDaniel P. Berrange *result = INT_MAX; 348473a2a33SDaniel P. Berrange errno = ERANGE; 349473a2a33SDaniel P. Berrange } else { 350473a2a33SDaniel P. Berrange *result = lresult; 351473a2a33SDaniel P. Berrange } 352473a2a33SDaniel P. Berrange return check_strtox_error(nptr, ep, endptr, errno); 353473a2a33SDaniel P. Berrange } 354473a2a33SDaniel P. Berrange 355473a2a33SDaniel P. Berrange /** 356473a2a33SDaniel P. Berrange * Convert string @nptr to an unsigned integer, and store it in @result. 357473a2a33SDaniel P. Berrange * 358473a2a33SDaniel P. Berrange * This is a wrapper around strtoul() that is harder to misuse. 359473a2a33SDaniel P. Berrange * Semantics of @nptr, @endptr, @base match strtoul() with differences 360473a2a33SDaniel P. Berrange * noted below. 361473a2a33SDaniel P. Berrange * 362473a2a33SDaniel P. Berrange * @nptr may be null, and no conversion is performed then. 363473a2a33SDaniel P. Berrange * 364473a2a33SDaniel P. Berrange * If no conversion is performed, store @nptr in *@endptr and return 365473a2a33SDaniel P. Berrange * -EINVAL. 366473a2a33SDaniel P. Berrange * 367473a2a33SDaniel P. Berrange * If @endptr is null, and the string isn't fully converted, return 368473a2a33SDaniel P. Berrange * -EINVAL. This is the case when the pointer that would be stored in 369473a2a33SDaniel P. Berrange * a non-null @endptr points to a character other than '\0'. 370473a2a33SDaniel P. Berrange * 371473a2a33SDaniel P. Berrange * If the conversion overflows @result, store UINT_MAX in @result, 372473a2a33SDaniel P. Berrange * and return -ERANGE. 373473a2a33SDaniel P. Berrange * 374473a2a33SDaniel P. Berrange * Else store the converted value in @result, and return zero. 375473a2a33SDaniel P. Berrange * 376473a2a33SDaniel P. Berrange * Note that a number with a leading minus sign gets converted without 377473a2a33SDaniel P. Berrange * the minus sign, checked for overflow (see above), then negated (in 378473a2a33SDaniel P. Berrange * @result's type). This is exactly how strtoul() works. 379473a2a33SDaniel P. Berrange */ 380473a2a33SDaniel P. Berrange int qemu_strtoui(const char *nptr, const char **endptr, int base, 381473a2a33SDaniel P. Berrange unsigned int *result) 382473a2a33SDaniel P. Berrange { 383473a2a33SDaniel P. Berrange char *ep; 384473a2a33SDaniel P. Berrange long long lresult; 385473a2a33SDaniel P. Berrange 38653a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 387473a2a33SDaniel P. Berrange if (!nptr) { 388473a2a33SDaniel P. Berrange if (endptr) { 389473a2a33SDaniel P. Berrange *endptr = nptr; 390473a2a33SDaniel P. Berrange } 391473a2a33SDaniel P. Berrange return -EINVAL; 392473a2a33SDaniel P. Berrange } 393473a2a33SDaniel P. Berrange 394473a2a33SDaniel P. Berrange errno = 0; 395473a2a33SDaniel P. Berrange lresult = strtoull(nptr, &ep, base); 396473a2a33SDaniel P. Berrange 397473a2a33SDaniel P. Berrange /* Windows returns 1 for negative out-of-range values. */ 398473a2a33SDaniel P. Berrange if (errno == ERANGE) { 399473a2a33SDaniel P. Berrange *result = -1; 400473a2a33SDaniel P. Berrange } else { 401473a2a33SDaniel P. Berrange if (lresult > UINT_MAX) { 402473a2a33SDaniel P. Berrange *result = UINT_MAX; 403473a2a33SDaniel P. Berrange errno = ERANGE; 404473a2a33SDaniel P. Berrange } else if (lresult < INT_MIN) { 405473a2a33SDaniel P. Berrange *result = UINT_MAX; 406473a2a33SDaniel P. Berrange errno = ERANGE; 407473a2a33SDaniel P. Berrange } else { 408473a2a33SDaniel P. Berrange *result = lresult; 409473a2a33SDaniel P. Berrange } 410473a2a33SDaniel P. Berrange } 411473a2a33SDaniel P. Berrange return check_strtox_error(nptr, ep, endptr, errno); 412473a2a33SDaniel P. Berrange } 413473a2a33SDaniel P. Berrange 414473a2a33SDaniel P. Berrange /** 4154295f879SMarkus Armbruster * Convert string @nptr to a long integer, and store it in @result. 416764e0fa4SCarlos L. Torres * 4174295f879SMarkus Armbruster * This is a wrapper around strtol() that is harder to misuse. 4184295f879SMarkus Armbruster * Semantics of @nptr, @endptr, @base match strtol() with differences 4194295f879SMarkus Armbruster * noted below. 420764e0fa4SCarlos L. Torres * 4214295f879SMarkus Armbruster * @nptr may be null, and no conversion is performed then. 422764e0fa4SCarlos L. Torres * 4234295f879SMarkus Armbruster * If no conversion is performed, store @nptr in *@endptr and return 4244295f879SMarkus Armbruster * -EINVAL. 425764e0fa4SCarlos L. Torres * 4264295f879SMarkus Armbruster * If @endptr is null, and the string isn't fully converted, return 4274295f879SMarkus Armbruster * -EINVAL. This is the case when the pointer that would be stored in 4284295f879SMarkus Armbruster * a non-null @endptr points to a character other than '\0'. 4294295f879SMarkus Armbruster * 4304295f879SMarkus Armbruster * If the conversion overflows @result, store LONG_MAX in @result, 4314295f879SMarkus Armbruster * and return -ERANGE. 4324295f879SMarkus Armbruster * 4334295f879SMarkus Armbruster * If the conversion underflows @result, store LONG_MIN in @result, 4344295f879SMarkus Armbruster * and return -ERANGE. 4354295f879SMarkus Armbruster * 4364295f879SMarkus Armbruster * Else store the converted value in @result, and return zero. 437764e0fa4SCarlos L. Torres */ 438764e0fa4SCarlos L. Torres int qemu_strtol(const char *nptr, const char **endptr, int base, 439764e0fa4SCarlos L. Torres long *result) 440764e0fa4SCarlos L. Torres { 441717adf96SMarkus Armbruster char *ep; 4424baef267SMarkus Armbruster 44353a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 444764e0fa4SCarlos L. Torres if (!nptr) { 445764e0fa4SCarlos L. Torres if (endptr) { 446764e0fa4SCarlos L. Torres *endptr = nptr; 447764e0fa4SCarlos L. Torres } 4484baef267SMarkus Armbruster return -EINVAL; 4494baef267SMarkus Armbruster } 4504baef267SMarkus Armbruster 451764e0fa4SCarlos L. Torres errno = 0; 452717adf96SMarkus Armbruster *result = strtol(nptr, &ep, base); 4534baef267SMarkus Armbruster return check_strtox_error(nptr, ep, endptr, errno); 454764e0fa4SCarlos L. Torres } 455c817c015SCarlos L. Torres 456c817c015SCarlos L. Torres /** 4574295f879SMarkus Armbruster * Convert string @nptr to an unsigned long, and store it in @result. 458c817c015SCarlos L. Torres * 4594295f879SMarkus Armbruster * This is a wrapper around strtoul() that is harder to misuse. 4604295f879SMarkus Armbruster * Semantics of @nptr, @endptr, @base match strtoul() with differences 4614295f879SMarkus Armbruster * noted below. 462c817c015SCarlos L. Torres * 4634295f879SMarkus Armbruster * @nptr may be null, and no conversion is performed then. 464c817c015SCarlos L. Torres * 4654295f879SMarkus Armbruster * If no conversion is performed, store @nptr in *@endptr and return 4664295f879SMarkus Armbruster * -EINVAL. 4674295f879SMarkus Armbruster * 4684295f879SMarkus Armbruster * If @endptr is null, and the string isn't fully converted, return 4694295f879SMarkus Armbruster * -EINVAL. This is the case when the pointer that would be stored in 4704295f879SMarkus Armbruster * a non-null @endptr points to a character other than '\0'. 4714295f879SMarkus Armbruster * 4724295f879SMarkus Armbruster * If the conversion overflows @result, store ULONG_MAX in @result, 4734295f879SMarkus Armbruster * and return -ERANGE. 4744295f879SMarkus Armbruster * 4754295f879SMarkus Armbruster * Else store the converted value in @result, and return zero. 4764295f879SMarkus Armbruster * 4774295f879SMarkus Armbruster * Note that a number with a leading minus sign gets converted without 4784295f879SMarkus Armbruster * the minus sign, checked for overflow (see above), then negated (in 4794295f879SMarkus Armbruster * @result's type). This is exactly how strtoul() works. 480c817c015SCarlos L. Torres */ 481c817c015SCarlos L. Torres int qemu_strtoul(const char *nptr, const char **endptr, int base, 482c817c015SCarlos L. Torres unsigned long *result) 483c817c015SCarlos L. Torres { 484717adf96SMarkus Armbruster char *ep; 4854baef267SMarkus Armbruster 48653a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 487c817c015SCarlos L. Torres if (!nptr) { 488c817c015SCarlos L. Torres if (endptr) { 489c817c015SCarlos L. Torres *endptr = nptr; 490c817c015SCarlos L. Torres } 4914baef267SMarkus Armbruster return -EINVAL; 4924baef267SMarkus Armbruster } 4934baef267SMarkus Armbruster 494c817c015SCarlos L. Torres errno = 0; 495717adf96SMarkus Armbruster *result = strtoul(nptr, &ep, base); 49647d4be12SPaolo Bonzini /* Windows returns 1 for negative out-of-range values. */ 49747d4be12SPaolo Bonzini if (errno == ERANGE) { 49847d4be12SPaolo Bonzini *result = -1; 49947d4be12SPaolo Bonzini } 5004baef267SMarkus Armbruster return check_strtox_error(nptr, ep, endptr, errno); 501c817c015SCarlos L. Torres } 502c817c015SCarlos L. Torres 503764e0fa4SCarlos L. Torres /** 5044295f879SMarkus Armbruster * Convert string @nptr to an int64_t. 5058ac4df40SCarlos L. Torres * 5064295f879SMarkus Armbruster * Works like qemu_strtol(), except it stores INT64_MAX on overflow, 5074295f879SMarkus Armbruster * and INT_MIN on underflow. 5088ac4df40SCarlos L. Torres */ 509b30d1886SMarkus Armbruster int qemu_strtoi64(const char *nptr, const char **endptr, int base, 5108ac4df40SCarlos L. Torres int64_t *result) 5118ac4df40SCarlos L. Torres { 512717adf96SMarkus Armbruster char *ep; 5134baef267SMarkus Armbruster 51453a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 5158ac4df40SCarlos L. Torres if (!nptr) { 5168ac4df40SCarlos L. Torres if (endptr) { 5178ac4df40SCarlos L. Torres *endptr = nptr; 5188ac4df40SCarlos L. Torres } 5194baef267SMarkus Armbruster return -EINVAL; 5204baef267SMarkus Armbruster } 5214baef267SMarkus Armbruster 5228ac4df40SCarlos L. Torres errno = 0; 5234295f879SMarkus Armbruster /* FIXME This assumes int64_t is long long */ 524717adf96SMarkus Armbruster *result = strtoll(nptr, &ep, base); 5254baef267SMarkus Armbruster return check_strtox_error(nptr, ep, endptr, errno); 5268ac4df40SCarlos L. Torres } 5278ac4df40SCarlos L. Torres 5288ac4df40SCarlos L. Torres /** 5294295f879SMarkus Armbruster * Convert string @nptr to an uint64_t. 5303904e6bfSCarlos L. Torres * 5314295f879SMarkus Armbruster * Works like qemu_strtoul(), except it stores UINT64_MAX on overflow. 5323904e6bfSCarlos L. Torres */ 533b30d1886SMarkus Armbruster int qemu_strtou64(const char *nptr, const char **endptr, int base, 5343904e6bfSCarlos L. Torres uint64_t *result) 5353904e6bfSCarlos L. Torres { 536717adf96SMarkus Armbruster char *ep; 5374baef267SMarkus Armbruster 53853a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 5393904e6bfSCarlos L. Torres if (!nptr) { 5403904e6bfSCarlos L. Torres if (endptr) { 5413904e6bfSCarlos L. Torres *endptr = nptr; 5423904e6bfSCarlos L. Torres } 5434baef267SMarkus Armbruster return -EINVAL; 5444baef267SMarkus Armbruster } 5454baef267SMarkus Armbruster 5463904e6bfSCarlos L. Torres errno = 0; 5474295f879SMarkus Armbruster /* FIXME This assumes uint64_t is unsigned long long */ 548717adf96SMarkus Armbruster *result = strtoull(nptr, &ep, base); 54947d4be12SPaolo Bonzini /* Windows returns 1 for negative out-of-range values. */ 55047d4be12SPaolo Bonzini if (errno == ERANGE) { 55147d4be12SPaolo Bonzini *result = -1; 55247d4be12SPaolo Bonzini } 5534baef267SMarkus Armbruster return check_strtox_error(nptr, ep, endptr, errno); 5543904e6bfSCarlos L. Torres } 5553904e6bfSCarlos L. Torres 5563904e6bfSCarlos L. Torres /** 557ca28f548SDavid Hildenbrand * Convert string @nptr to a double. 558ca28f548SDavid Hildenbrand * 559ca28f548SDavid Hildenbrand * This is a wrapper around strtod() that is harder to misuse. 560ca28f548SDavid Hildenbrand * Semantics of @nptr and @endptr match strtod() with differences 561ca28f548SDavid Hildenbrand * noted below. 562ca28f548SDavid Hildenbrand * 563ca28f548SDavid Hildenbrand * @nptr may be null, and no conversion is performed then. 564ca28f548SDavid Hildenbrand * 565ca28f548SDavid Hildenbrand * If no conversion is performed, store @nptr in *@endptr and return 566ca28f548SDavid Hildenbrand * -EINVAL. 567ca28f548SDavid Hildenbrand * 568ca28f548SDavid Hildenbrand * If @endptr is null, and the string isn't fully converted, return 569ca28f548SDavid Hildenbrand * -EINVAL. This is the case when the pointer that would be stored in 570ca28f548SDavid Hildenbrand * a non-null @endptr points to a character other than '\0'. 571ca28f548SDavid Hildenbrand * 572ca28f548SDavid Hildenbrand * If the conversion overflows, store +/-HUGE_VAL in @result, depending 573ca28f548SDavid Hildenbrand * on the sign, and return -ERANGE. 574ca28f548SDavid Hildenbrand * 575ca28f548SDavid Hildenbrand * If the conversion underflows, store +/-0.0 in @result, depending on the 576ca28f548SDavid Hildenbrand * sign, and return -ERANGE. 577ca28f548SDavid Hildenbrand * 578ca28f548SDavid Hildenbrand * Else store the converted value in @result, and return zero. 579ca28f548SDavid Hildenbrand */ 580ca28f548SDavid Hildenbrand int qemu_strtod(const char *nptr, const char **endptr, double *result) 581ca28f548SDavid Hildenbrand { 582ca28f548SDavid Hildenbrand char *ep; 583ca28f548SDavid Hildenbrand 584ca28f548SDavid Hildenbrand if (!nptr) { 585ca28f548SDavid Hildenbrand if (endptr) { 586ca28f548SDavid Hildenbrand *endptr = nptr; 587ca28f548SDavid Hildenbrand } 588ca28f548SDavid Hildenbrand return -EINVAL; 589ca28f548SDavid Hildenbrand } 590ca28f548SDavid Hildenbrand 591ca28f548SDavid Hildenbrand errno = 0; 592ca28f548SDavid Hildenbrand *result = strtod(nptr, &ep); 593ca28f548SDavid Hildenbrand return check_strtox_error(nptr, ep, endptr, errno); 594ca28f548SDavid Hildenbrand } 595ca28f548SDavid Hildenbrand 596ca28f548SDavid Hildenbrand /** 597ca28f548SDavid Hildenbrand * Convert string @nptr to a finite double. 598ca28f548SDavid Hildenbrand * 599ca28f548SDavid Hildenbrand * Works like qemu_strtod(), except that "NaN" and "inf" are rejected 600ca28f548SDavid Hildenbrand * with -EINVAL and no conversion is performed. 601ca28f548SDavid Hildenbrand */ 602ca28f548SDavid Hildenbrand int qemu_strtod_finite(const char *nptr, const char **endptr, double *result) 603ca28f548SDavid Hildenbrand { 604ca28f548SDavid Hildenbrand double tmp; 605ca28f548SDavid Hildenbrand int ret; 606ca28f548SDavid Hildenbrand 607ca28f548SDavid Hildenbrand ret = qemu_strtod(nptr, endptr, &tmp); 608ca28f548SDavid Hildenbrand if (!ret && !isfinite(tmp)) { 609ca28f548SDavid Hildenbrand if (endptr) { 610ca28f548SDavid Hildenbrand *endptr = nptr; 611ca28f548SDavid Hildenbrand } 612ca28f548SDavid Hildenbrand ret = -EINVAL; 613ca28f548SDavid Hildenbrand } 614ca28f548SDavid Hildenbrand 615ca28f548SDavid Hildenbrand if (ret != -EINVAL) { 616ca28f548SDavid Hildenbrand *result = tmp; 617ca28f548SDavid Hildenbrand } 618ca28f548SDavid Hildenbrand return ret; 619ca28f548SDavid Hildenbrand } 620ca28f548SDavid Hildenbrand 621ca28f548SDavid Hildenbrand /** 6225c99fa37SKeno Fischer * Searches for the first occurrence of 'c' in 's', and returns a pointer 6235c99fa37SKeno Fischer * to the trailing null byte if none was found. 6245c99fa37SKeno Fischer */ 6255c99fa37SKeno Fischer #ifndef HAVE_STRCHRNUL 6265c99fa37SKeno Fischer const char *qemu_strchrnul(const char *s, int c) 6275c99fa37SKeno Fischer { 6285c99fa37SKeno Fischer const char *e = strchr(s, c); 6295c99fa37SKeno Fischer if (!e) { 6305c99fa37SKeno Fischer e = s + strlen(s); 6315c99fa37SKeno Fischer } 6325c99fa37SKeno Fischer return e; 6335c99fa37SKeno Fischer } 6345c99fa37SKeno Fischer #endif 6355c99fa37SKeno Fischer 6365c99fa37SKeno Fischer /** 637e3f9fe2dSEduardo Habkost * parse_uint: 638e3f9fe2dSEduardo Habkost * 639e3f9fe2dSEduardo Habkost * @s: String to parse 640e3f9fe2dSEduardo Habkost * @value: Destination for parsed integer value 641e3f9fe2dSEduardo Habkost * @endptr: Destination for pointer to first character not consumed 642e3f9fe2dSEduardo Habkost * @base: integer base, between 2 and 36 inclusive, or 0 643e3f9fe2dSEduardo Habkost * 644e3f9fe2dSEduardo Habkost * Parse unsigned integer 645e3f9fe2dSEduardo Habkost * 646e3f9fe2dSEduardo Habkost * Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional 647e3f9fe2dSEduardo Habkost * '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits. 648e3f9fe2dSEduardo Habkost * 649e3f9fe2dSEduardo Habkost * If @s is null, or @base is invalid, or @s doesn't start with an 650e3f9fe2dSEduardo Habkost * integer in the syntax above, set *@value to 0, *@endptr to @s, and 651e3f9fe2dSEduardo Habkost * return -EINVAL. 652e3f9fe2dSEduardo Habkost * 653e3f9fe2dSEduardo Habkost * Set *@endptr to point right beyond the parsed integer (even if the integer 654e3f9fe2dSEduardo Habkost * overflows or is negative, all digits will be parsed and *@endptr will 655e3f9fe2dSEduardo Habkost * point right beyond them). 656e3f9fe2dSEduardo Habkost * 657e3f9fe2dSEduardo Habkost * If the integer is negative, set *@value to 0, and return -ERANGE. 658e3f9fe2dSEduardo Habkost * 659e3f9fe2dSEduardo Habkost * If the integer overflows unsigned long long, set *@value to 660e3f9fe2dSEduardo Habkost * ULLONG_MAX, and return -ERANGE. 661e3f9fe2dSEduardo Habkost * 662e3f9fe2dSEduardo Habkost * Else, set *@value to the parsed integer, and return 0. 663e3f9fe2dSEduardo Habkost */ 664e3f9fe2dSEduardo Habkost int parse_uint(const char *s, unsigned long long *value, char **endptr, 665e3f9fe2dSEduardo Habkost int base) 666e3f9fe2dSEduardo Habkost { 667e3f9fe2dSEduardo Habkost int r = 0; 668e3f9fe2dSEduardo Habkost char *endp = (char *)s; 669e3f9fe2dSEduardo Habkost unsigned long long val = 0; 670e3f9fe2dSEduardo Habkost 67153a90b97SEric Blake assert((unsigned) base <= 36 && base != 1); 672e3f9fe2dSEduardo Habkost if (!s) { 673e3f9fe2dSEduardo Habkost r = -EINVAL; 674e3f9fe2dSEduardo Habkost goto out; 675e3f9fe2dSEduardo Habkost } 676e3f9fe2dSEduardo Habkost 677e3f9fe2dSEduardo Habkost errno = 0; 678e3f9fe2dSEduardo Habkost val = strtoull(s, &endp, base); 679e3f9fe2dSEduardo Habkost if (errno) { 680e3f9fe2dSEduardo Habkost r = -errno; 681e3f9fe2dSEduardo Habkost goto out; 682e3f9fe2dSEduardo Habkost } 683e3f9fe2dSEduardo Habkost 684e3f9fe2dSEduardo Habkost if (endp == s) { 685e3f9fe2dSEduardo Habkost r = -EINVAL; 686e3f9fe2dSEduardo Habkost goto out; 687e3f9fe2dSEduardo Habkost } 688e3f9fe2dSEduardo Habkost 689e3f9fe2dSEduardo Habkost /* make sure we reject negative numbers: */ 690db3d11eeSMarkus Armbruster while (qemu_isspace(*s)) { 691e3f9fe2dSEduardo Habkost s++; 692e3f9fe2dSEduardo Habkost } 693e3f9fe2dSEduardo Habkost if (*s == '-') { 694e3f9fe2dSEduardo Habkost val = 0; 695e3f9fe2dSEduardo Habkost r = -ERANGE; 696e3f9fe2dSEduardo Habkost goto out; 697e3f9fe2dSEduardo Habkost } 698e3f9fe2dSEduardo Habkost 699e3f9fe2dSEduardo Habkost out: 700e3f9fe2dSEduardo Habkost *value = val; 701e3f9fe2dSEduardo Habkost *endptr = endp; 702e3f9fe2dSEduardo Habkost return r; 703e3f9fe2dSEduardo Habkost } 704e3f9fe2dSEduardo Habkost 705e3f9fe2dSEduardo Habkost /** 706e3f9fe2dSEduardo Habkost * parse_uint_full: 707e3f9fe2dSEduardo Habkost * 708e3f9fe2dSEduardo Habkost * @s: String to parse 709e3f9fe2dSEduardo Habkost * @value: Destination for parsed integer value 710e3f9fe2dSEduardo Habkost * @base: integer base, between 2 and 36 inclusive, or 0 711e3f9fe2dSEduardo Habkost * 712e3f9fe2dSEduardo Habkost * Parse unsigned integer from entire string 713e3f9fe2dSEduardo Habkost * 714e3f9fe2dSEduardo Habkost * Have the same behavior of parse_uint(), but with an additional check 715e3f9fe2dSEduardo Habkost * for additional data after the parsed number. If extra characters are present 716e3f9fe2dSEduardo Habkost * after the parsed number, the function will return -EINVAL, and *@v will 717e3f9fe2dSEduardo Habkost * be set to 0. 718e3f9fe2dSEduardo Habkost */ 719e3f9fe2dSEduardo Habkost int parse_uint_full(const char *s, unsigned long long *value, int base) 720e3f9fe2dSEduardo Habkost { 721e3f9fe2dSEduardo Habkost char *endp; 722e3f9fe2dSEduardo Habkost int r; 723e3f9fe2dSEduardo Habkost 724e3f9fe2dSEduardo Habkost r = parse_uint(s, value, &endp, base); 725e3f9fe2dSEduardo Habkost if (r < 0) { 726e3f9fe2dSEduardo Habkost return r; 727e3f9fe2dSEduardo Habkost } 728e3f9fe2dSEduardo Habkost if (*endp) { 729e3f9fe2dSEduardo Habkost *value = 0; 730e3f9fe2dSEduardo Habkost return -EINVAL; 731e3f9fe2dSEduardo Habkost } 732e3f9fe2dSEduardo Habkost 733e3f9fe2dSEduardo Habkost return 0; 734e3f9fe2dSEduardo Habkost } 735e3f9fe2dSEduardo Habkost 736baacf047SPaolo Bonzini int qemu_parse_fd(const char *param) 737baacf047SPaolo Bonzini { 738e9c5c1f4SLaszlo Ersek long fd; 739e9c5c1f4SLaszlo Ersek char *endptr; 740baacf047SPaolo Bonzini 741e9c5c1f4SLaszlo Ersek errno = 0; 742baacf047SPaolo Bonzini fd = strtol(param, &endptr, 10); 743e9c5c1f4SLaszlo Ersek if (param == endptr /* no conversion performed */ || 744e9c5c1f4SLaszlo Ersek errno != 0 /* not representable as long; possibly others */ || 745e9c5c1f4SLaszlo Ersek *endptr != '\0' /* final string not empty */ || 746e9c5c1f4SLaszlo Ersek fd < 0 /* invalid as file descriptor */ || 747e9c5c1f4SLaszlo Ersek fd > INT_MAX /* not representable as int */) { 748baacf047SPaolo Bonzini return -1; 749baacf047SPaolo Bonzini } 750baacf047SPaolo Bonzini return fd; 751baacf047SPaolo Bonzini } 752baacf047SPaolo Bonzini 753baacf047SPaolo Bonzini /* 754baacf047SPaolo Bonzini * Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128) 755baacf047SPaolo Bonzini * Input is limited to 14-bit numbers 756baacf047SPaolo Bonzini */ 757baacf047SPaolo Bonzini int uleb128_encode_small(uint8_t *out, uint32_t n) 758baacf047SPaolo Bonzini { 759baacf047SPaolo Bonzini g_assert(n <= 0x3fff); 760baacf047SPaolo Bonzini if (n < 0x80) { 7617c960d61SWei Yang *out = n; 762baacf047SPaolo Bonzini return 1; 763baacf047SPaolo Bonzini } else { 764baacf047SPaolo Bonzini *out++ = (n & 0x7f) | 0x80; 7657c960d61SWei Yang *out = n >> 7; 766baacf047SPaolo Bonzini return 2; 767baacf047SPaolo Bonzini } 768baacf047SPaolo Bonzini } 769baacf047SPaolo Bonzini 770baacf047SPaolo Bonzini int uleb128_decode_small(const uint8_t *in, uint32_t *n) 771baacf047SPaolo Bonzini { 772baacf047SPaolo Bonzini if (!(*in & 0x80)) { 7737c960d61SWei Yang *n = *in; 774baacf047SPaolo Bonzini return 1; 775baacf047SPaolo Bonzini } else { 776baacf047SPaolo Bonzini *n = *in++ & 0x7f; 777baacf047SPaolo Bonzini /* we exceed 14 bit number */ 778baacf047SPaolo Bonzini if (*in & 0x80) { 779baacf047SPaolo Bonzini return -1; 780baacf047SPaolo Bonzini } 7817c960d61SWei Yang *n |= *in << 7; 782baacf047SPaolo Bonzini return 2; 783baacf047SPaolo Bonzini } 784baacf047SPaolo Bonzini } 785b16352acSAlon Levy 786b16352acSAlon Levy /* 787b16352acSAlon Levy * helper to parse debug environment variables 788b16352acSAlon Levy */ 789b16352acSAlon Levy int parse_debug_env(const char *name, int max, int initial) 790b16352acSAlon Levy { 791b16352acSAlon Levy char *debug_env = getenv(name); 792b16352acSAlon Levy char *inv = NULL; 793cc5d0e04SPaolo Bonzini long debug; 794b16352acSAlon Levy 795b16352acSAlon Levy if (!debug_env) { 796b16352acSAlon Levy return initial; 797b16352acSAlon Levy } 798cc5d0e04SPaolo Bonzini errno = 0; 799b16352acSAlon Levy debug = strtol(debug_env, &inv, 10); 800b16352acSAlon Levy if (inv == debug_env) { 801b16352acSAlon Levy return initial; 802b16352acSAlon Levy } 803cc5d0e04SPaolo Bonzini if (debug < 0 || debug > max || errno != 0) { 80405cb8ed5SAlistair Francis warn_report("%s not in [0, %d]", name, max); 805b16352acSAlon Levy return initial; 806b16352acSAlon Levy } 807b16352acSAlon Levy return debug; 808b16352acSAlon Levy } 8094297c8eeSAlexey Kardashevskiy 8104297c8eeSAlexey Kardashevskiy /* 8114297c8eeSAlexey Kardashevskiy * Helper to print ethernet mac address 8124297c8eeSAlexey Kardashevskiy */ 8134297c8eeSAlexey Kardashevskiy const char *qemu_ether_ntoa(const MACAddr *mac) 8144297c8eeSAlexey Kardashevskiy { 8154297c8eeSAlexey Kardashevskiy static char ret[18]; 8164297c8eeSAlexey Kardashevskiy 8174297c8eeSAlexey Kardashevskiy snprintf(ret, sizeof(ret), "%02x:%02x:%02x:%02x:%02x:%02x", 8184297c8eeSAlexey Kardashevskiy mac->a[0], mac->a[1], mac->a[2], mac->a[3], mac->a[4], mac->a[5]); 8194297c8eeSAlexey Kardashevskiy 8204297c8eeSAlexey Kardashevskiy return ret; 8214297c8eeSAlexey Kardashevskiy } 82222951aaaSPeter Xu 82322951aaaSPeter Xu /* 82422951aaaSPeter Xu * Return human readable string for size @val. 82522951aaaSPeter Xu * @val can be anything that uint64_t allows (no more than "16 EiB"). 82622951aaaSPeter Xu * Use IEC binary units like KiB, MiB, and so forth. 82722951aaaSPeter Xu * Caller is responsible for passing it to g_free(). 82822951aaaSPeter Xu */ 82922951aaaSPeter Xu char *size_to_str(uint64_t val) 83022951aaaSPeter Xu { 83122951aaaSPeter Xu static const char *suffixes[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei" }; 832754da867SEric Blake uint64_t div; 83322951aaaSPeter Xu int i; 83422951aaaSPeter Xu 83522951aaaSPeter Xu /* 83622951aaaSPeter Xu * The exponent (returned in i) minus one gives us 83722951aaaSPeter Xu * floor(log2(val * 1024 / 1000). The correction makes us 83822951aaaSPeter Xu * switch to the higher power when the integer part is >= 1000. 83922951aaaSPeter Xu * (see e41b509d68afb1f for more info) 84022951aaaSPeter Xu */ 84122951aaaSPeter Xu frexp(val / (1000.0 / 1024.0), &i); 84222951aaaSPeter Xu i = (i - 1) / 10; 84322951aaaSPeter Xu div = 1ULL << (i * 10); 84422951aaaSPeter Xu 84522951aaaSPeter Xu return g_strdup_printf("%0.3g %sB", (double)val / div, suffixes[i]); 84622951aaaSPeter Xu } 84785e33a28SMarc-André Lureau 84885e33a28SMarc-André Lureau int qemu_pstrcmp0(const char **str1, const char **str2) 84985e33a28SMarc-André Lureau { 85085e33a28SMarc-André Lureau return g_strcmp0(*str1, *str2); 85185e33a28SMarc-André Lureau } 852