96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* Convert decimal strings with bounds checking and exit on error.
|
|
|
|
Copyright (C) 2014-2025 Free Software Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <config.h>
|
|
|
|
#include "xdectoint.h"
|
|
|
|
#include <errno.h>
|
|
#include <inttypes.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <error.h>
|
|
#include <quote.h>
|
|
#include <xstrtol.h>
|
|
|
|
/* Parse numeric string N_STR of base BASE, and return the value.
|
|
The value is between MIN and MAX.
|
|
Strings can have multiplicative SUFFIXES if specified.
|
|
On a parse error or out-of-range number, diagnose with N_STR and ERR, and
|
|
exit with status ERR_EXIT if nonzero, EXIT_FAILURE otherwise.
|
|
However, if FLAGS & XTOINT_MIN_QUIET, do not diagnose or exit
|
|
for too-low numbers; return MIN and set errno instead.
|
|
Similarly for XTOINT_MAX_QUIET and too-high numbers and MAX.
|
|
The errno value and diagnostic for out-of-range values depend on
|
|
whether FLAGS & XTOINT_MIN_RANGE and FLAGS & XTOINT_MAX_RANGE are set. */
|
|
|
|
__xdectoint_t
|
|
__xnumtoint (char const *n_str, int base, __xdectoint_t min, __xdectoint_t max,
|
|
char const *suffixes, char const *err, int err_exit,
|
|
int flags)
|
|
{
|
|
__xdectoint_t tnum, r;
|
|
strtol_error s_err = __xstrtol (n_str, nullptr, base, &tnum, suffixes);
|
|
|
|
/* Errno value to report if there is an overflow. */
|
|
int overflow_errno;
|
|
|
|
if (s_err != LONGINT_INVALID)
|
|
{
|
|
if (tnum < min)
|
|
{
|
|
r = min;
|
|
overflow_errno = flags & XTOINT_MIN_RANGE ? ERANGE : EOVERFLOW;
|
|
if (s_err == LONGINT_OK)
|
|
s_err = LONGINT_OVERFLOW;
|
|
}
|
|
else if (max < tnum)
|
|
{
|
|
r = max;
|
|
overflow_errno = flags & XTOINT_MAX_RANGE ? ERANGE : EOVERFLOW;
|
|
if (s_err == LONGINT_OK)
|
|
s_err = LONGINT_OVERFLOW;
|
|
}
|
|
else
|
|
{
|
|
r = tnum;
|
|
overflow_errno = EOVERFLOW;
|
|
}
|
|
}
|
|
|
|
int e = s_err == LONGINT_OVERFLOW ? overflow_errno : 0;
|
|
|
|
if (! (s_err == LONGINT_OK
|
|
|| (s_err == LONGINT_OVERFLOW
|
|
&& flags & (tnum < 0 ? XTOINT_MIN_QUIET : XTOINT_MAX_QUIET))))
|
|
error (err_exit ? err_exit : EXIT_FAILURE, e, "%s: %s", err, quote (n_str));
|
|
|
|
errno = e;
|
|
return r;
|
|
}
|
|
|
|
/* Parse decimal string N_STR, and return the value.
|
|
Exit on parse error or if MIN or MAX are exceeded.
|
|
Strings can have multiplicative SUFFIXES if specified.
|
|
ERR is printed along with N_STR on error. */
|
|
|
|
__xdectoint_t
|
|
__xdectoint (char const *n_str, __xdectoint_t min, __xdectoint_t max,
|
|
char const *suffixes, char const *err, int err_exit)
|
|
{
|
|
return __xnumtoint (n_str, 10, min, max, suffixes, err, err_exit, 0);
|
|
}
|