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Annotation of embedaddon/mrouted/strtonum.c, revision 1.1

1.1     ! misho       1: /*     $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $    */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 2004 Ted Unangst and Todd Miller
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Permission to use, copy, modify, and distribute this software for any
        !             8:  * purpose with or without fee is hereby granted, provided that the above
        !             9:  * copyright notice and this permission notice appear in all copies.
        !            10:  *
        !            11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            15:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            16:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            17:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            18:  */
        !            19: 
        !            20: #include <errno.h>
        !            21: #include <limits.h>
        !            22: #include <stdlib.h>
        !            23: 
        !            24: #define INVALID        1
        !            25: #define TOOSMALL       2
        !            26: #define TOOLARGE       3
        !            27: 
        !            28: /* Not defined in GLIBC */
        !            29: #ifndef LLONG_MAX
        !            30: # define LLONG_MAX 0x7fffffffffffffffLL
        !            31: #endif
        !            32: 
        !            33: #ifndef LLONG_MIN
        !            34: # define LLONG_MIN (-0x7fffffffffffffffLL-1)
        !            35: #endif
        !            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:        char *ep;
        !            43:        int error = 0;
        !            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: /**
        !            77:  * Local Variables:
        !            78:  *  version-control: t
        !            79:  *  c-file-style: "bsd"
        !            80:  * End:
        !            81:  */