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Annotation of mandoc/compat_fgetln.c, Revision 1.1

1.1     ! kristaps    1: #ifdef HAVE_FGETLN
        !             2:
        !             3: int dummy;
        !             4:
        !             5: #else
        !             6:
        !             7: /*     $NetBSD: fgetln.c,v 1.3 2006/09/25 07:18:17 lukem Exp $ */
        !             8:
        !             9: /*-
        !            10:  * Copyright (c) 1998 The NetBSD Foundation, Inc.
        !            11:  * All rights reserved.
        !            12:  *
        !            13:  * This code is derived from software contributed to The NetBSD Foundation
        !            14:  * by Christos Zoulas.
        !            15:  *
        !            16:  * Redistribution and use in source and binary forms, with or without
        !            17:  * modification, are permitted provided that the following conditions
        !            18:  * are met:
        !            19:  * 1. Redistributions of source code must retain the above copyright
        !            20:  *    notice, this list of conditions and the following disclaimer.
        !            21:  * 2. Redistributions in binary form must reproduce the above copyright
        !            22:  *    notice, this list of conditions and the following disclaimer in the
        !            23:  *    documentation and/or other materials provided with the distribution.
        !            24:  * 3. Neither the name of The NetBSD Foundation nor the names of its
        !            25:  *    contributors may be used to endorse or promote products derived
        !            26:  *    from this software without specific prior written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            29:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            30:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            31:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            32:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            33:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            34:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            35:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            36:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            37:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            38:  * POSSIBILITY OF SUCH DAMAGE.
        !            39:  */
        !            40: #include <errno.h>
        !            41: #include <stdio.h>
        !            42: #include <stdlib.h>
        !            43: #include <string.h>
        !            44:
        !            45: char *
        !            46: fgetln(fp, len)
        !            47:        FILE *fp;
        !            48:        size_t *len;
        !            49: {
        !            50:        static char *buf = NULL;
        !            51:        static size_t bufsiz = 0;
        !            52:        char *ptr;
        !            53:
        !            54:
        !            55:        if (buf == NULL) {
        !            56:                bufsiz = BUFSIZ;
        !            57:                if ((buf = malloc(bufsiz)) == NULL)
        !            58:                        return NULL;
        !            59:        }
        !            60:
        !            61:        if (fgets(buf, bufsiz, fp) == NULL)
        !            62:                return NULL;
        !            63:
        !            64:        *len = 0;
        !            65:        while ((ptr = strchr(&buf[*len], '\n')) == NULL) {
        !            66:                size_t nbufsiz = bufsiz + BUFSIZ;
        !            67:                char *nbuf = realloc(buf, nbufsiz);
        !            68:
        !            69:                if (nbuf == NULL) {
        !            70:                        int oerrno = errno;
        !            71:                        free(buf);
        !            72:                        errno = oerrno;
        !            73:                        buf = NULL;
        !            74:                        return NULL;
        !            75:                } else
        !            76:                        buf = nbuf;
        !            77:
        !            78:                *len = bufsiz;
        !            79:                if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL)
        !            80:                        return buf;
        !            81:
        !            82:                bufsiz = nbufsiz;
        !            83:        }
        !            84:
        !            85:        *len = (ptr - buf) + 1;
        !            86:        return buf;
        !            87: }
        !            88:
        !            89: #endif

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