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 */ 24aafd7584SPeter Maydell #include "qemu/osdep.h" 25baacf047SPaolo Bonzini #include "qemu-common.h" 26baacf047SPaolo Bonzini #include "qemu/host-utils.h" 27baacf047SPaolo Bonzini #include <math.h> 28baacf047SPaolo Bonzini 29baacf047SPaolo Bonzini #include "qemu/sockets.h" 30baacf047SPaolo Bonzini #include "qemu/iov.h" 314297c8eeSAlexey Kardashevskiy #include "net/net.h" 32f348b6d1SVeronia Bahaa #include "qemu/cutils.h" 33baacf047SPaolo Bonzini 34baacf047SPaolo Bonzini void strpadcpy(char *buf, int buf_size, const char *str, char pad) 35baacf047SPaolo Bonzini { 36baacf047SPaolo Bonzini int len = qemu_strnlen(str, buf_size); 37baacf047SPaolo Bonzini memcpy(buf, str, len); 38baacf047SPaolo Bonzini memset(buf + len, pad, buf_size - len); 39baacf047SPaolo Bonzini } 40baacf047SPaolo Bonzini 41baacf047SPaolo Bonzini void pstrcpy(char *buf, int buf_size, const char *str) 42baacf047SPaolo Bonzini { 43baacf047SPaolo Bonzini int c; 44baacf047SPaolo Bonzini char *q = buf; 45baacf047SPaolo Bonzini 46baacf047SPaolo Bonzini if (buf_size <= 0) 47baacf047SPaolo Bonzini return; 48baacf047SPaolo Bonzini 49baacf047SPaolo Bonzini for(;;) { 50baacf047SPaolo Bonzini c = *str++; 51baacf047SPaolo Bonzini if (c == 0 || q >= buf + buf_size - 1) 52baacf047SPaolo Bonzini break; 53baacf047SPaolo Bonzini *q++ = c; 54baacf047SPaolo Bonzini } 55baacf047SPaolo Bonzini *q = '\0'; 56baacf047SPaolo Bonzini } 57baacf047SPaolo Bonzini 58baacf047SPaolo Bonzini /* strcat and truncate. */ 59baacf047SPaolo Bonzini char *pstrcat(char *buf, int buf_size, const char *s) 60baacf047SPaolo Bonzini { 61baacf047SPaolo Bonzini int len; 62baacf047SPaolo Bonzini len = strlen(buf); 63baacf047SPaolo Bonzini if (len < buf_size) 64baacf047SPaolo Bonzini pstrcpy(buf + len, buf_size - len, s); 65baacf047SPaolo Bonzini return buf; 66baacf047SPaolo Bonzini } 67baacf047SPaolo Bonzini 68baacf047SPaolo Bonzini int strstart(const char *str, const char *val, const char **ptr) 69baacf047SPaolo Bonzini { 70baacf047SPaolo Bonzini const char *p, *q; 71baacf047SPaolo Bonzini p = str; 72baacf047SPaolo Bonzini q = val; 73baacf047SPaolo Bonzini while (*q != '\0') { 74baacf047SPaolo Bonzini if (*p != *q) 75baacf047SPaolo Bonzini return 0; 76baacf047SPaolo Bonzini p++; 77baacf047SPaolo Bonzini q++; 78baacf047SPaolo Bonzini } 79baacf047SPaolo Bonzini if (ptr) 80baacf047SPaolo Bonzini *ptr = p; 81baacf047SPaolo Bonzini return 1; 82baacf047SPaolo Bonzini } 83baacf047SPaolo Bonzini 84baacf047SPaolo Bonzini int stristart(const char *str, const char *val, const char **ptr) 85baacf047SPaolo Bonzini { 86baacf047SPaolo Bonzini const char *p, *q; 87baacf047SPaolo Bonzini p = str; 88baacf047SPaolo Bonzini q = val; 89baacf047SPaolo Bonzini while (*q != '\0') { 90baacf047SPaolo Bonzini if (qemu_toupper(*p) != qemu_toupper(*q)) 91baacf047SPaolo Bonzini return 0; 92baacf047SPaolo Bonzini p++; 93baacf047SPaolo Bonzini q++; 94baacf047SPaolo Bonzini } 95baacf047SPaolo Bonzini if (ptr) 96baacf047SPaolo Bonzini *ptr = p; 97baacf047SPaolo Bonzini return 1; 98baacf047SPaolo Bonzini } 99baacf047SPaolo Bonzini 100baacf047SPaolo Bonzini /* XXX: use host strnlen if available ? */ 101baacf047SPaolo Bonzini int qemu_strnlen(const char *s, int max_len) 102baacf047SPaolo Bonzini { 103baacf047SPaolo Bonzini int i; 104baacf047SPaolo Bonzini 105baacf047SPaolo Bonzini for(i = 0; i < max_len; i++) { 106baacf047SPaolo Bonzini if (s[i] == '\0') { 107baacf047SPaolo Bonzini break; 108baacf047SPaolo Bonzini } 109baacf047SPaolo Bonzini } 110baacf047SPaolo Bonzini return i; 111baacf047SPaolo Bonzini } 112baacf047SPaolo Bonzini 113a38ed811SKevin Wolf char *qemu_strsep(char **input, const char *delim) 114a38ed811SKevin Wolf { 115a38ed811SKevin Wolf char *result = *input; 116a38ed811SKevin Wolf if (result != NULL) { 117a38ed811SKevin Wolf char *p; 118a38ed811SKevin Wolf 119a38ed811SKevin Wolf for (p = result; *p != '\0'; p++) { 120a38ed811SKevin Wolf if (strchr(delim, *p)) { 121a38ed811SKevin Wolf break; 122a38ed811SKevin Wolf } 123a38ed811SKevin Wolf } 124a38ed811SKevin Wolf if (*p == '\0') { 125a38ed811SKevin Wolf *input = NULL; 126a38ed811SKevin Wolf } else { 127a38ed811SKevin Wolf *p = '\0'; 128a38ed811SKevin Wolf *input = p + 1; 129a38ed811SKevin Wolf } 130a38ed811SKevin Wolf } 131a38ed811SKevin Wolf return result; 132a38ed811SKevin Wolf } 133a38ed811SKevin Wolf 134baacf047SPaolo Bonzini time_t mktimegm(struct tm *tm) 135baacf047SPaolo Bonzini { 136baacf047SPaolo Bonzini time_t t; 137baacf047SPaolo Bonzini int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday; 138baacf047SPaolo Bonzini if (m < 3) { 139baacf047SPaolo Bonzini m += 12; 140baacf047SPaolo Bonzini y--; 141baacf047SPaolo Bonzini } 142baacf047SPaolo Bonzini t = 86400ULL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + 143baacf047SPaolo Bonzini y / 400 - 719469); 144baacf047SPaolo Bonzini t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec; 145baacf047SPaolo Bonzini return t; 146baacf047SPaolo Bonzini } 147baacf047SPaolo Bonzini 148baacf047SPaolo Bonzini /* 149baacf047SPaolo Bonzini * Make sure data goes on disk, but if possible do not bother to 150baacf047SPaolo Bonzini * write out the inode just for timestamp updates. 151baacf047SPaolo Bonzini * 152baacf047SPaolo Bonzini * Unfortunately even in 2009 many operating systems do not support 153baacf047SPaolo Bonzini * fdatasync and have to fall back to fsync. 154baacf047SPaolo Bonzini */ 155baacf047SPaolo Bonzini int qemu_fdatasync(int fd) 156baacf047SPaolo Bonzini { 157baacf047SPaolo Bonzini #ifdef CONFIG_FDATASYNC 158baacf047SPaolo Bonzini return fdatasync(fd); 159baacf047SPaolo Bonzini #else 160baacf047SPaolo Bonzini return fsync(fd); 161baacf047SPaolo Bonzini #endif 162baacf047SPaolo Bonzini } 163baacf047SPaolo Bonzini 164baacf047SPaolo Bonzini #ifndef _WIN32 165baacf047SPaolo Bonzini /* Sets a specific flag */ 166baacf047SPaolo Bonzini int fcntl_setfl(int fd, int flag) 167baacf047SPaolo Bonzini { 168baacf047SPaolo Bonzini int flags; 169baacf047SPaolo Bonzini 170baacf047SPaolo Bonzini flags = fcntl(fd, F_GETFL); 171baacf047SPaolo Bonzini if (flags == -1) 172baacf047SPaolo Bonzini return -errno; 173baacf047SPaolo Bonzini 174baacf047SPaolo Bonzini if (fcntl(fd, F_SETFL, flags | flag) == -1) 175baacf047SPaolo Bonzini return -errno; 176baacf047SPaolo Bonzini 177baacf047SPaolo Bonzini return 0; 178baacf047SPaolo Bonzini } 179baacf047SPaolo Bonzini #endif 180baacf047SPaolo Bonzini 181baacf047SPaolo Bonzini static int64_t suffix_mul(char suffix, int64_t unit) 182baacf047SPaolo Bonzini { 183baacf047SPaolo Bonzini switch (qemu_toupper(suffix)) { 1844677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_B: 185baacf047SPaolo Bonzini return 1; 1864677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_KB: 187baacf047SPaolo Bonzini return unit; 1884677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_MB: 189baacf047SPaolo Bonzini return unit * unit; 1904677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_GB: 191baacf047SPaolo Bonzini return unit * unit * unit; 1924677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_TB: 193baacf047SPaolo Bonzini return unit * unit * unit * unit; 1944677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_PB: 1955e00984aSKevin Wolf return unit * unit * unit * unit * unit; 1964677bb40SMarc-André Lureau case QEMU_STRTOSZ_DEFSUFFIX_EB: 1975e00984aSKevin Wolf return unit * unit * unit * unit * unit * unit; 198baacf047SPaolo Bonzini } 199baacf047SPaolo Bonzini return -1; 200baacf047SPaolo Bonzini } 201baacf047SPaolo Bonzini 202baacf047SPaolo Bonzini /* 203baacf047SPaolo Bonzini * Convert string to bytes, allowing either B/b for bytes, K/k for KB, 204baacf047SPaolo Bonzini * M/m for MB, G/g for GB or T/t for TB. End pointer will be returned 205baacf047SPaolo Bonzini * in *end, if not NULL. Return -ERANGE on overflow, Return -EINVAL on 206baacf047SPaolo Bonzini * other error. 207baacf047SPaolo Bonzini */ 2084677bb40SMarc-André Lureau int64_t qemu_strtosz_suffix_unit(const char *nptr, char **end, 209baacf047SPaolo Bonzini const char default_suffix, int64_t unit) 210baacf047SPaolo Bonzini { 211baacf047SPaolo Bonzini int64_t retval = -EINVAL; 212baacf047SPaolo Bonzini char *endptr; 213baacf047SPaolo Bonzini unsigned char c; 214baacf047SPaolo Bonzini int mul_required = 0; 215baacf047SPaolo Bonzini double val, mul, integral, fraction; 216baacf047SPaolo Bonzini 217baacf047SPaolo Bonzini errno = 0; 218baacf047SPaolo Bonzini val = strtod(nptr, &endptr); 219baacf047SPaolo Bonzini if (isnan(val) || endptr == nptr || errno != 0) { 220baacf047SPaolo Bonzini goto fail; 221baacf047SPaolo Bonzini } 222baacf047SPaolo Bonzini fraction = modf(val, &integral); 223baacf047SPaolo Bonzini if (fraction != 0) { 224baacf047SPaolo Bonzini mul_required = 1; 225baacf047SPaolo Bonzini } 226baacf047SPaolo Bonzini c = *endptr; 227baacf047SPaolo Bonzini mul = suffix_mul(c, unit); 228baacf047SPaolo Bonzini if (mul >= 0) { 229baacf047SPaolo Bonzini endptr++; 230baacf047SPaolo Bonzini } else { 231baacf047SPaolo Bonzini mul = suffix_mul(default_suffix, unit); 232baacf047SPaolo Bonzini assert(mul >= 0); 233baacf047SPaolo Bonzini } 234baacf047SPaolo Bonzini if (mul == 1 && mul_required) { 235baacf047SPaolo Bonzini goto fail; 236baacf047SPaolo Bonzini } 237baacf047SPaolo Bonzini if ((val * mul >= INT64_MAX) || val < 0) { 238baacf047SPaolo Bonzini retval = -ERANGE; 239baacf047SPaolo Bonzini goto fail; 240baacf047SPaolo Bonzini } 241baacf047SPaolo Bonzini retval = val * mul; 242baacf047SPaolo Bonzini 243baacf047SPaolo Bonzini fail: 244baacf047SPaolo Bonzini if (end) { 245baacf047SPaolo Bonzini *end = endptr; 246baacf047SPaolo Bonzini } 247baacf047SPaolo Bonzini 248baacf047SPaolo Bonzini return retval; 249baacf047SPaolo Bonzini } 250baacf047SPaolo Bonzini 2514677bb40SMarc-André Lureau int64_t qemu_strtosz_suffix(const char *nptr, char **end, 2524677bb40SMarc-André Lureau const char default_suffix) 253baacf047SPaolo Bonzini { 2544677bb40SMarc-André Lureau return qemu_strtosz_suffix_unit(nptr, end, default_suffix, 1024); 255baacf047SPaolo Bonzini } 256baacf047SPaolo Bonzini 2574677bb40SMarc-André Lureau int64_t qemu_strtosz(const char *nptr, char **end) 258baacf047SPaolo Bonzini { 2594677bb40SMarc-André Lureau return qemu_strtosz_suffix(nptr, end, QEMU_STRTOSZ_DEFSUFFIX_MB); 260baacf047SPaolo Bonzini } 261baacf047SPaolo Bonzini 262e3f9fe2dSEduardo Habkost /** 263*717adf96SMarkus Armbruster * Helper function for error checking after strtol() and the like 264764e0fa4SCarlos L. Torres */ 265*717adf96SMarkus Armbruster static int check_strtox_error(const char *nptr, char *ep, 266*717adf96SMarkus Armbruster const char **endptr, int libc_errno) 267764e0fa4SCarlos L. Torres { 268*717adf96SMarkus Armbruster if (libc_errno == 0 && ep == nptr) { 269*717adf96SMarkus Armbruster libc_errno = EINVAL; 27047d4be12SPaolo Bonzini } 271*717adf96SMarkus Armbruster if (!endptr && *ep) { 272764e0fa4SCarlos L. Torres return -EINVAL; 273764e0fa4SCarlos L. Torres } 274*717adf96SMarkus Armbruster if (endptr) { 275*717adf96SMarkus Armbruster *endptr = ep; 276764e0fa4SCarlos L. Torres } 277*717adf96SMarkus Armbruster return -libc_errno; 278764e0fa4SCarlos L. Torres } 279764e0fa4SCarlos L. Torres 280764e0fa4SCarlos L. Torres /** 2814295f879SMarkus Armbruster * Convert string @nptr to a long integer, and store it in @result. 282764e0fa4SCarlos L. Torres * 2834295f879SMarkus Armbruster * This is a wrapper around strtol() that is harder to misuse. 2844295f879SMarkus Armbruster * Semantics of @nptr, @endptr, @base match strtol() with differences 2854295f879SMarkus Armbruster * noted below. 286764e0fa4SCarlos L. Torres * 2874295f879SMarkus Armbruster * @nptr may be null, and no conversion is performed then. 288764e0fa4SCarlos L. Torres * 2894295f879SMarkus Armbruster * If no conversion is performed, store @nptr in *@endptr and return 2904295f879SMarkus Armbruster * -EINVAL. 291764e0fa4SCarlos L. Torres * 2924295f879SMarkus Armbruster * If @endptr is null, and the string isn't fully converted, return 2934295f879SMarkus Armbruster * -EINVAL. This is the case when the pointer that would be stored in 2944295f879SMarkus Armbruster * a non-null @endptr points to a character other than '\0'. 2954295f879SMarkus Armbruster * 2964295f879SMarkus Armbruster * If the conversion overflows @result, store LONG_MAX in @result, 2974295f879SMarkus Armbruster * and return -ERANGE. 2984295f879SMarkus Armbruster * 2994295f879SMarkus Armbruster * If the conversion underflows @result, store LONG_MIN in @result, 3004295f879SMarkus Armbruster * and return -ERANGE. 3014295f879SMarkus Armbruster * 3024295f879SMarkus Armbruster * Else store the converted value in @result, and return zero. 303764e0fa4SCarlos L. Torres */ 304764e0fa4SCarlos L. Torres int qemu_strtol(const char *nptr, const char **endptr, int base, 305764e0fa4SCarlos L. Torres long *result) 306764e0fa4SCarlos L. Torres { 307*717adf96SMarkus Armbruster char *ep; 308764e0fa4SCarlos L. Torres int err = 0; 309764e0fa4SCarlos L. Torres if (!nptr) { 310764e0fa4SCarlos L. Torres if (endptr) { 311764e0fa4SCarlos L. Torres *endptr = nptr; 312764e0fa4SCarlos L. Torres } 313764e0fa4SCarlos L. Torres err = -EINVAL; 314764e0fa4SCarlos L. Torres } else { 315764e0fa4SCarlos L. Torres errno = 0; 316*717adf96SMarkus Armbruster *result = strtol(nptr, &ep, base); 317*717adf96SMarkus Armbruster err = check_strtox_error(nptr, ep, endptr, errno); 318764e0fa4SCarlos L. Torres } 319764e0fa4SCarlos L. Torres return err; 320764e0fa4SCarlos L. Torres } 321c817c015SCarlos L. Torres 322c817c015SCarlos L. Torres /** 3234295f879SMarkus Armbruster * Convert string @nptr to an unsigned long, and store it in @result. 324c817c015SCarlos L. Torres * 3254295f879SMarkus Armbruster * This is a wrapper around strtoul() that is harder to misuse. 3264295f879SMarkus Armbruster * Semantics of @nptr, @endptr, @base match strtoul() with differences 3274295f879SMarkus Armbruster * noted below. 328c817c015SCarlos L. Torres * 3294295f879SMarkus Armbruster * @nptr may be null, and no conversion is performed then. 330c817c015SCarlos L. Torres * 3314295f879SMarkus Armbruster * If no conversion is performed, store @nptr in *@endptr and return 3324295f879SMarkus Armbruster * -EINVAL. 3334295f879SMarkus Armbruster * 3344295f879SMarkus Armbruster * If @endptr is null, and the string isn't fully converted, return 3354295f879SMarkus Armbruster * -EINVAL. This is the case when the pointer that would be stored in 3364295f879SMarkus Armbruster * a non-null @endptr points to a character other than '\0'. 3374295f879SMarkus Armbruster * 3384295f879SMarkus Armbruster * If the conversion overflows @result, store ULONG_MAX in @result, 3394295f879SMarkus Armbruster * and return -ERANGE. 3404295f879SMarkus Armbruster * 3414295f879SMarkus Armbruster * Else store the converted value in @result, and return zero. 3424295f879SMarkus Armbruster * 3434295f879SMarkus Armbruster * Note that a number with a leading minus sign gets converted without 3444295f879SMarkus Armbruster * the minus sign, checked for overflow (see above), then negated (in 3454295f879SMarkus Armbruster * @result's type). This is exactly how strtoul() works. 346c817c015SCarlos L. Torres */ 347c817c015SCarlos L. Torres int qemu_strtoul(const char *nptr, const char **endptr, int base, 348c817c015SCarlos L. Torres unsigned long *result) 349c817c015SCarlos L. Torres { 350*717adf96SMarkus Armbruster char *ep; 351c817c015SCarlos L. Torres int err = 0; 352c817c015SCarlos L. Torres if (!nptr) { 353c817c015SCarlos L. Torres if (endptr) { 354c817c015SCarlos L. Torres *endptr = nptr; 355c817c015SCarlos L. Torres } 356c817c015SCarlos L. Torres err = -EINVAL; 357c817c015SCarlos L. Torres } else { 358c817c015SCarlos L. Torres errno = 0; 359*717adf96SMarkus Armbruster *result = strtoul(nptr, &ep, base); 36047d4be12SPaolo Bonzini /* Windows returns 1 for negative out-of-range values. */ 36147d4be12SPaolo Bonzini if (errno == ERANGE) { 36247d4be12SPaolo Bonzini *result = -1; 36347d4be12SPaolo Bonzini } 364*717adf96SMarkus Armbruster err = check_strtox_error(nptr, ep, endptr, errno); 365c817c015SCarlos L. Torres } 366c817c015SCarlos L. Torres return err; 367c817c015SCarlos L. Torres } 368c817c015SCarlos L. Torres 369764e0fa4SCarlos L. Torres /** 3704295f879SMarkus Armbruster * Convert string @nptr to an int64_t. 3718ac4df40SCarlos L. Torres * 3724295f879SMarkus Armbruster * Works like qemu_strtol(), except it stores INT64_MAX on overflow, 3734295f879SMarkus Armbruster * and INT_MIN on underflow. 3748ac4df40SCarlos L. Torres */ 375b30d1886SMarkus Armbruster int qemu_strtoi64(const char *nptr, const char **endptr, int base, 3768ac4df40SCarlos L. Torres int64_t *result) 3778ac4df40SCarlos L. Torres { 378*717adf96SMarkus Armbruster char *ep; 3798ac4df40SCarlos L. Torres int err = 0; 3808ac4df40SCarlos L. Torres if (!nptr) { 3818ac4df40SCarlos L. Torres if (endptr) { 3828ac4df40SCarlos L. Torres *endptr = nptr; 3838ac4df40SCarlos L. Torres } 3848ac4df40SCarlos L. Torres err = -EINVAL; 3858ac4df40SCarlos L. Torres } else { 3868ac4df40SCarlos L. Torres errno = 0; 3874295f879SMarkus Armbruster /* FIXME This assumes int64_t is long long */ 388*717adf96SMarkus Armbruster *result = strtoll(nptr, &ep, base); 389*717adf96SMarkus Armbruster err = check_strtox_error(nptr, ep, endptr, errno); 3908ac4df40SCarlos L. Torres } 3918ac4df40SCarlos L. Torres return err; 3928ac4df40SCarlos L. Torres } 3938ac4df40SCarlos L. Torres 3948ac4df40SCarlos L. Torres /** 3954295f879SMarkus Armbruster * Convert string @nptr to an uint64_t. 3963904e6bfSCarlos L. Torres * 3974295f879SMarkus Armbruster * Works like qemu_strtoul(), except it stores UINT64_MAX on overflow. 3983904e6bfSCarlos L. Torres */ 399b30d1886SMarkus Armbruster int qemu_strtou64(const char *nptr, const char **endptr, int base, 4003904e6bfSCarlos L. Torres uint64_t *result) 4013904e6bfSCarlos L. Torres { 402*717adf96SMarkus Armbruster char *ep; 4033904e6bfSCarlos L. Torres int err = 0; 4043904e6bfSCarlos L. Torres if (!nptr) { 4053904e6bfSCarlos L. Torres if (endptr) { 4063904e6bfSCarlos L. Torres *endptr = nptr; 4073904e6bfSCarlos L. Torres } 4083904e6bfSCarlos L. Torres err = -EINVAL; 4093904e6bfSCarlos L. Torres } else { 4103904e6bfSCarlos L. Torres errno = 0; 4114295f879SMarkus Armbruster /* FIXME This assumes uint64_t is unsigned long long */ 412*717adf96SMarkus Armbruster *result = strtoull(nptr, &ep, base); 41347d4be12SPaolo Bonzini /* Windows returns 1 for negative out-of-range values. */ 41447d4be12SPaolo Bonzini if (errno == ERANGE) { 41547d4be12SPaolo Bonzini *result = -1; 41647d4be12SPaolo Bonzini } 417*717adf96SMarkus Armbruster err = check_strtox_error(nptr, ep, endptr, errno); 4183904e6bfSCarlos L. Torres } 4193904e6bfSCarlos L. Torres return err; 4203904e6bfSCarlos L. Torres } 4213904e6bfSCarlos L. Torres 4223904e6bfSCarlos L. Torres /** 423e3f9fe2dSEduardo Habkost * parse_uint: 424e3f9fe2dSEduardo Habkost * 425e3f9fe2dSEduardo Habkost * @s: String to parse 426e3f9fe2dSEduardo Habkost * @value: Destination for parsed integer value 427e3f9fe2dSEduardo Habkost * @endptr: Destination for pointer to first character not consumed 428e3f9fe2dSEduardo Habkost * @base: integer base, between 2 and 36 inclusive, or 0 429e3f9fe2dSEduardo Habkost * 430e3f9fe2dSEduardo Habkost * Parse unsigned integer 431e3f9fe2dSEduardo Habkost * 432e3f9fe2dSEduardo Habkost * Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional 433e3f9fe2dSEduardo Habkost * '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits. 434e3f9fe2dSEduardo Habkost * 435e3f9fe2dSEduardo Habkost * If @s is null, or @base is invalid, or @s doesn't start with an 436e3f9fe2dSEduardo Habkost * integer in the syntax above, set *@value to 0, *@endptr to @s, and 437e3f9fe2dSEduardo Habkost * return -EINVAL. 438e3f9fe2dSEduardo Habkost * 439e3f9fe2dSEduardo Habkost * Set *@endptr to point right beyond the parsed integer (even if the integer 440e3f9fe2dSEduardo Habkost * overflows or is negative, all digits will be parsed and *@endptr will 441e3f9fe2dSEduardo Habkost * point right beyond them). 442e3f9fe2dSEduardo Habkost * 443e3f9fe2dSEduardo Habkost * If the integer is negative, set *@value to 0, and return -ERANGE. 444e3f9fe2dSEduardo Habkost * 445e3f9fe2dSEduardo Habkost * If the integer overflows unsigned long long, set *@value to 446e3f9fe2dSEduardo Habkost * ULLONG_MAX, and return -ERANGE. 447e3f9fe2dSEduardo Habkost * 448e3f9fe2dSEduardo Habkost * Else, set *@value to the parsed integer, and return 0. 449e3f9fe2dSEduardo Habkost */ 450e3f9fe2dSEduardo Habkost int parse_uint(const char *s, unsigned long long *value, char **endptr, 451e3f9fe2dSEduardo Habkost int base) 452e3f9fe2dSEduardo Habkost { 453e3f9fe2dSEduardo Habkost int r = 0; 454e3f9fe2dSEduardo Habkost char *endp = (char *)s; 455e3f9fe2dSEduardo Habkost unsigned long long val = 0; 456e3f9fe2dSEduardo Habkost 457e3f9fe2dSEduardo Habkost if (!s) { 458e3f9fe2dSEduardo Habkost r = -EINVAL; 459e3f9fe2dSEduardo Habkost goto out; 460e3f9fe2dSEduardo Habkost } 461e3f9fe2dSEduardo Habkost 462e3f9fe2dSEduardo Habkost errno = 0; 463e3f9fe2dSEduardo Habkost val = strtoull(s, &endp, base); 464e3f9fe2dSEduardo Habkost if (errno) { 465e3f9fe2dSEduardo Habkost r = -errno; 466e3f9fe2dSEduardo Habkost goto out; 467e3f9fe2dSEduardo Habkost } 468e3f9fe2dSEduardo Habkost 469e3f9fe2dSEduardo Habkost if (endp == s) { 470e3f9fe2dSEduardo Habkost r = -EINVAL; 471e3f9fe2dSEduardo Habkost goto out; 472e3f9fe2dSEduardo Habkost } 473e3f9fe2dSEduardo Habkost 474e3f9fe2dSEduardo Habkost /* make sure we reject negative numbers: */ 475e3f9fe2dSEduardo Habkost while (isspace((unsigned char)*s)) { 476e3f9fe2dSEduardo Habkost s++; 477e3f9fe2dSEduardo Habkost } 478e3f9fe2dSEduardo Habkost if (*s == '-') { 479e3f9fe2dSEduardo Habkost val = 0; 480e3f9fe2dSEduardo Habkost r = -ERANGE; 481e3f9fe2dSEduardo Habkost goto out; 482e3f9fe2dSEduardo Habkost } 483e3f9fe2dSEduardo Habkost 484e3f9fe2dSEduardo Habkost out: 485e3f9fe2dSEduardo Habkost *value = val; 486e3f9fe2dSEduardo Habkost *endptr = endp; 487e3f9fe2dSEduardo Habkost return r; 488e3f9fe2dSEduardo Habkost } 489e3f9fe2dSEduardo Habkost 490e3f9fe2dSEduardo Habkost /** 491e3f9fe2dSEduardo Habkost * parse_uint_full: 492e3f9fe2dSEduardo Habkost * 493e3f9fe2dSEduardo Habkost * @s: String to parse 494e3f9fe2dSEduardo Habkost * @value: Destination for parsed integer value 495e3f9fe2dSEduardo Habkost * @base: integer base, between 2 and 36 inclusive, or 0 496e3f9fe2dSEduardo Habkost * 497e3f9fe2dSEduardo Habkost * Parse unsigned integer from entire string 498e3f9fe2dSEduardo Habkost * 499e3f9fe2dSEduardo Habkost * Have the same behavior of parse_uint(), but with an additional check 500e3f9fe2dSEduardo Habkost * for additional data after the parsed number. If extra characters are present 501e3f9fe2dSEduardo Habkost * after the parsed number, the function will return -EINVAL, and *@v will 502e3f9fe2dSEduardo Habkost * be set to 0. 503e3f9fe2dSEduardo Habkost */ 504e3f9fe2dSEduardo Habkost int parse_uint_full(const char *s, unsigned long long *value, int base) 505e3f9fe2dSEduardo Habkost { 506e3f9fe2dSEduardo Habkost char *endp; 507e3f9fe2dSEduardo Habkost int r; 508e3f9fe2dSEduardo Habkost 509e3f9fe2dSEduardo Habkost r = parse_uint(s, value, &endp, base); 510e3f9fe2dSEduardo Habkost if (r < 0) { 511e3f9fe2dSEduardo Habkost return r; 512e3f9fe2dSEduardo Habkost } 513e3f9fe2dSEduardo Habkost if (*endp) { 514e3f9fe2dSEduardo Habkost *value = 0; 515e3f9fe2dSEduardo Habkost return -EINVAL; 516e3f9fe2dSEduardo Habkost } 517e3f9fe2dSEduardo Habkost 518e3f9fe2dSEduardo Habkost return 0; 519e3f9fe2dSEduardo Habkost } 520e3f9fe2dSEduardo Habkost 521baacf047SPaolo Bonzini int qemu_parse_fd(const char *param) 522baacf047SPaolo Bonzini { 523e9c5c1f4SLaszlo Ersek long fd; 524e9c5c1f4SLaszlo Ersek char *endptr; 525baacf047SPaolo Bonzini 526e9c5c1f4SLaszlo Ersek errno = 0; 527baacf047SPaolo Bonzini fd = strtol(param, &endptr, 10); 528e9c5c1f4SLaszlo Ersek if (param == endptr /* no conversion performed */ || 529e9c5c1f4SLaszlo Ersek errno != 0 /* not representable as long; possibly others */ || 530e9c5c1f4SLaszlo Ersek *endptr != '\0' /* final string not empty */ || 531e9c5c1f4SLaszlo Ersek fd < 0 /* invalid as file descriptor */ || 532e9c5c1f4SLaszlo Ersek fd > INT_MAX /* not representable as int */) { 533baacf047SPaolo Bonzini return -1; 534baacf047SPaolo Bonzini } 535baacf047SPaolo Bonzini return fd; 536baacf047SPaolo Bonzini } 537baacf047SPaolo Bonzini 538baacf047SPaolo Bonzini /* 539baacf047SPaolo Bonzini * Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128) 540baacf047SPaolo Bonzini * Input is limited to 14-bit numbers 541baacf047SPaolo Bonzini */ 542baacf047SPaolo Bonzini int uleb128_encode_small(uint8_t *out, uint32_t n) 543baacf047SPaolo Bonzini { 544baacf047SPaolo Bonzini g_assert(n <= 0x3fff); 545baacf047SPaolo Bonzini if (n < 0x80) { 546baacf047SPaolo Bonzini *out++ = n; 547baacf047SPaolo Bonzini return 1; 548baacf047SPaolo Bonzini } else { 549baacf047SPaolo Bonzini *out++ = (n & 0x7f) | 0x80; 550baacf047SPaolo Bonzini *out++ = n >> 7; 551baacf047SPaolo Bonzini return 2; 552baacf047SPaolo Bonzini } 553baacf047SPaolo Bonzini } 554baacf047SPaolo Bonzini 555baacf047SPaolo Bonzini int uleb128_decode_small(const uint8_t *in, uint32_t *n) 556baacf047SPaolo Bonzini { 557baacf047SPaolo Bonzini if (!(*in & 0x80)) { 558baacf047SPaolo Bonzini *n = *in++; 559baacf047SPaolo Bonzini return 1; 560baacf047SPaolo Bonzini } else { 561baacf047SPaolo Bonzini *n = *in++ & 0x7f; 562baacf047SPaolo Bonzini /* we exceed 14 bit number */ 563baacf047SPaolo Bonzini if (*in & 0x80) { 564baacf047SPaolo Bonzini return -1; 565baacf047SPaolo Bonzini } 566baacf047SPaolo Bonzini *n |= *in++ << 7; 567baacf047SPaolo Bonzini return 2; 568baacf047SPaolo Bonzini } 569baacf047SPaolo Bonzini } 570b16352acSAlon Levy 571b16352acSAlon Levy /* 572b16352acSAlon Levy * helper to parse debug environment variables 573b16352acSAlon Levy */ 574b16352acSAlon Levy int parse_debug_env(const char *name, int max, int initial) 575b16352acSAlon Levy { 576b16352acSAlon Levy char *debug_env = getenv(name); 577b16352acSAlon Levy char *inv = NULL; 578cc5d0e04SPaolo Bonzini long debug; 579b16352acSAlon Levy 580b16352acSAlon Levy if (!debug_env) { 581b16352acSAlon Levy return initial; 582b16352acSAlon Levy } 583cc5d0e04SPaolo Bonzini errno = 0; 584b16352acSAlon Levy debug = strtol(debug_env, &inv, 10); 585b16352acSAlon Levy if (inv == debug_env) { 586b16352acSAlon Levy return initial; 587b16352acSAlon Levy } 588cc5d0e04SPaolo Bonzini if (debug < 0 || debug > max || errno != 0) { 589b16352acSAlon Levy fprintf(stderr, "warning: %s not in [0, %d]", name, max); 590b16352acSAlon Levy return initial; 591b16352acSAlon Levy } 592b16352acSAlon Levy return debug; 593b16352acSAlon Levy } 5944297c8eeSAlexey Kardashevskiy 5954297c8eeSAlexey Kardashevskiy /* 5964297c8eeSAlexey Kardashevskiy * Helper to print ethernet mac address 5974297c8eeSAlexey Kardashevskiy */ 5984297c8eeSAlexey Kardashevskiy const char *qemu_ether_ntoa(const MACAddr *mac) 5994297c8eeSAlexey Kardashevskiy { 6004297c8eeSAlexey Kardashevskiy static char ret[18]; 6014297c8eeSAlexey Kardashevskiy 6024297c8eeSAlexey Kardashevskiy snprintf(ret, sizeof(ret), "%02x:%02x:%02x:%02x:%02x:%02x", 6034297c8eeSAlexey Kardashevskiy mac->a[0], mac->a[1], mac->a[2], mac->a[3], mac->a[4], mac->a[5]); 6044297c8eeSAlexey Kardashevskiy 6054297c8eeSAlexey Kardashevskiy return ret; 6064297c8eeSAlexey Kardashevskiy } 607