90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* Convert decimal strings with bounds checking and exit on error.
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Copyright (C) 2014-2022 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include "xdectoint.h"
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#include <errno.h>
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#include <inttypes.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include "error.h"
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#include "quote.h"
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#include "verify.h"
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#include "xstrtol.h"
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/* Parse numeric string N_STR of base BASE, and return the value.
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Exit on parse error or if MIN or MAX are exceeded.
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Strings can have multiplicative SUFFIXES if specified.
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ERR is printed along with N_STR on error. */
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__xdectoint_t
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__xnumtoint (char const *n_str, int base, __xdectoint_t min, __xdectoint_t max,
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char const *suffixes, char const *err, int err_exit)
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{
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strtol_error s_err;
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__xdectoint_t tnum;
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s_err = __xstrtol (n_str, NULL, base, &tnum, suffixes);
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if (s_err == LONGINT_OK)
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{
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if (tnum < min || max < tnum)
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{
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s_err = LONGINT_OVERFLOW;
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/* Use have the INT range as a heuristic to distinguish
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type overflow rather than other min/max limits. */
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if (tnum > INT_MAX / 2)
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errno = EOVERFLOW;
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#if __xdectoint_signed
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else if (tnum < INT_MIN / 2)
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errno = EOVERFLOW;
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#endif
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else
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errno = ERANGE;
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}
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}
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else if (s_err == LONGINT_OVERFLOW)
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errno = EOVERFLOW;
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else if (s_err == LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW)
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errno = 0; /* Don't show ERANGE errors for invalid numbers. */
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if (s_err != LONGINT_OK)
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{
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/* EINVAL error message is redundant in this context. */
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error (err_exit ? err_exit : EXIT_FAILURE, errno == EINVAL ? 0 : errno,
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"%s: %s", err, quote (n_str));
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assume (false);
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}
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return tnum;
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}
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/* Parse decimal string N_STR, and return the value.
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Exit on parse error or if MIN or MAX are exceeded.
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Strings can have multiplicative SUFFIXES if specified.
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ERR is printed along with N_STR on error. */
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__xdectoint_t
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__xdectoint (char const *n_str, __xdectoint_t min, __xdectoint_t max,
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char const *suffixes, char const *err, int err_exit)
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{
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return __xnumtoint (n_str, 10, min, max, suffixes, err, err_exit);
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}
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