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227 lines
5.3 KiB
C
227 lines
5.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* ascii-to-numbers implementations for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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unsigned long long xstrtoull(const char *numstr, int base)
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{
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unsigned long long r;
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int old_errno;
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char *e;
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if ((*numstr == '-') || (isspace)(*numstr))
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bb_error_msg_and_die("invalid number '%s'", numstr);
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old_errno = errno;
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errno = 0;
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r = strtoull(numstr, &e, base);
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if (errno || (numstr == e) || *e)
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/* Error / no digits / illegal trailing chars */
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bb_error_msg_and_die("invalid number '%s'", numstr);
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/* No error. So restore errno. */
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errno = old_errno;
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return r;
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}
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unsigned long long xatoull(const char *numstr)
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{
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return xstrtoull(numstr, 10);
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}
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unsigned long xstrtoul_range_sfx(const char *numstr, int base,
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unsigned long lower,
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unsigned long upper,
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const struct suffix_mult *suffixes)
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{
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unsigned long r;
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int old_errno;
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char *e;
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/* Disallow '-' and any leading whitespace. Speed isn't critical here
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* since we're parsing commandline args. So make sure we get the
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* actual isspace function rather than a lnumstrer macro implementaion. */
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if ((*numstr == '-') || (isspace)(*numstr))
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goto inval;
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/* Since this is a lib function, we're not allowed to reset errno to 0.
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* Doing so could break an app that is deferring checking of errno.
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* So, save the old value so that we can restore it if successful. */
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old_errno = errno;
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errno = 0;
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r = strtoul(numstr, &e, base);
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/* Do the initial validity check. Note: The standards do not
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* guarantee that errno is set if no digits were found. So we
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* must test for this explicitly. */
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if (errno || (numstr == e))
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goto inval; /* error / no digits / illegal trailing chars */
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errno = old_errno; /* Ok. So restore errno. */
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/* Do optional suffix parsing. Allow 'empty' suffix tables.
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* Note that we also allow nul suffixes with associated multipliers,
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* to allow for scaling of the numstr by some default multiplier. */
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if (suffixes) {
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while (suffixes->suffix) {
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if (strcmp(suffixes->suffix, e) == 0) {
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if (ULONG_MAX / suffixes->mult < r)
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goto range; /* overflow! */
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++e;
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r *= suffixes->mult;
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break;
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}
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++suffixes;
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}
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}
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/* Note: trailing space is an error.
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It would be easy enough to allow though if desired. */
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if (*e)
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goto inval;
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/* Finally, check for range limits. */
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if (r >= lower && r <= upper)
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return r;
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range:
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bb_error_msg_and_die("number %s is not in %lu..%lu range",
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numstr, lower, upper);
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inval:
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bb_error_msg_and_die("invalid number '%s'", numstr);
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}
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unsigned long xstrtoul_range(const char *numstr, int base,
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unsigned long lower,
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unsigned long upper)
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{
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return xstrtoul_range_sfx(numstr, base, lower, upper, NULL);
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}
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unsigned long xstrtoul_sfx(const char *numstr, int base,
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const struct suffix_mult *suffixes)
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{
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return xstrtoul_range_sfx(numstr, base, 0, ULONG_MAX, suffixes);
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}
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unsigned long xstrtoul(const char *numstr, int base)
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{
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return xstrtoul_range_sfx(numstr, base, 0, ULONG_MAX, NULL);
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}
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unsigned long xatoul_range_sfx(const char *numstr,
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unsigned long lower,
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unsigned long upper,
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const struct suffix_mult *suffixes)
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{
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return xstrtoul_range_sfx(numstr, 10, lower, upper, suffixes);
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}
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unsigned long xatoul_sfx(const char *numstr,
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const struct suffix_mult *suffixes)
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{
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return xstrtoul_range_sfx(numstr, 10, 0, ULONG_MAX, suffixes);
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}
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unsigned long xatoul_range(const char *numstr,
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unsigned long lower,
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unsigned long upper)
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{
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return xstrtoul_range_sfx(numstr, 10, lower, upper, NULL);
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}
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unsigned long xatoul(const char *numstr)
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{
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return xatoul_sfx(numstr, NULL);
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}
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/* Signed ones */
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long xstrtol_range_sfx(const char *numstr, int base,
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long lower,
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long upper,
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const struct suffix_mult *suffixes)
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{
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unsigned long u = LONG_MAX;
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long r;
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const char *p = numstr;
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if ((p[0] == '-') && (p[1] != '+')) {
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++p;
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++u; /* two's complement */
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}
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r = xstrtoul_range_sfx(p, base, 0, u, suffixes);
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if (*numstr == '-') {
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r = -r;
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}
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if (r < lower || r > upper) {
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bb_error_msg_and_die("number %s is not in %ld..%ld range",
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numstr, lower, upper);
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}
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return r;
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}
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long xstrtol_range(const char *numstr, int base, long lower, long upper)
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{
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return xstrtol_range_sfx(numstr, base, lower, upper, NULL);
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}
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long xatol_range_sfx(const char *numstr,
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long lower,
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long upper,
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const struct suffix_mult *suffixes)
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{
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return xstrtol_range_sfx(numstr, 10, lower, upper, suffixes);
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}
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long xatol_range(const char *numstr, long lower, long upper)
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{
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return xstrtol_range_sfx(numstr, 10, lower, upper, NULL);
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}
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long xatol_sfx(const char *numstr, const struct suffix_mult *suffixes)
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{
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return xstrtol_range_sfx(numstr, 10, LONG_MIN, LONG_MAX, suffixes);
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}
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long xatol(const char *numstr)
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{
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return xstrtol_range_sfx(numstr, 10, LONG_MIN, LONG_MAX, NULL);
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}
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/* Others */
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unsigned xatou(const char *numstr)
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{
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return xatoul_range(numstr, 0, UINT_MAX);
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}
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int xatoi_range(const char *numstr, int lower, int upper)
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{
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return xatol_range(numstr, lower, upper);
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}
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int xatoi(const char *numstr)
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{
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return xatol_range(numstr, INT_MIN, INT_MAX);
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}
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int xatoi_u(const char *numstr)
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{
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return xatoul_range(numstr, 0, INT_MAX);
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}
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uint32_t xatou32(const char *numstr)
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{
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return xatoul_range(numstr, 0, 0xffffffff);
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}
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uint16_t xatou16(const char *numstr)
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{
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return xatoul_range(numstr, 0, 0xffff);
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}
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