Annotation of mandoc/compat_strtonum.c, Revision 1.1
1.1 ! schwarze 1: #include "config.h"
! 2:
! 3: #if HAVE_STRTONUM
! 4:
! 5: int dummy;
! 6:
! 7: #else
! 8:
! 9: /* $Id$ */
! 10: /* $OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu Exp $ */
! 11:
! 12: /*
! 13: * Copyright (c) 2004 Ted Unangst and Todd Miller
! 14: * All rights reserved.
! 15: *
! 16: * Permission to use, copy, modify, and distribute this software for any
! 17: * purpose with or without fee is hereby granted, provided that the above
! 18: * copyright notice and this permission notice appear in all copies.
! 19: *
! 20: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 21: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 22: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 23: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 24: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 25: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 26: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 27: */
! 28:
! 29: #include <errno.h>
! 30: #include <limits.h>
! 31: #include <stdlib.h>
! 32:
! 33: #define INVALID 1
! 34: #define TOOSMALL 2
! 35: #define TOOLARGE 3
! 36:
! 37: long long
! 38: strtonum(const char *numstr, long long minval, long long maxval,
! 39: const char **errstrp)
! 40: {
! 41: long long ll = 0;
! 42: int error = 0;
! 43: char *ep;
! 44: struct errval {
! 45: const char *errstr;
! 46: int err;
! 47: } ev[4] = {
! 48: { NULL, 0 },
! 49: { "invalid", EINVAL },
! 50: { "too small", ERANGE },
! 51: { "too large", ERANGE },
! 52: };
! 53:
! 54: ev[0].err = errno;
! 55: errno = 0;
! 56: if (minval > maxval) {
! 57: error = INVALID;
! 58: } else {
! 59: ll = strtoll(numstr, &ep, 10);
! 60: if (numstr == ep || *ep != '\0')
! 61: error = INVALID;
! 62: else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
! 63: error = TOOSMALL;
! 64: else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
! 65: error = TOOLARGE;
! 66: }
! 67: if (errstrp != NULL)
! 68: *errstrp = ev[error].errstr;
! 69: errno = ev[error].err;
! 70: if (error)
! 71: ll = 0;
! 72:
! 73: return (ll);
! 74: }
! 75:
! 76: #endif /* !HAVE_STRTONUM */
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