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