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Annotation of mandoc/compat_fgetln.c, Revision 1.2

1.2     ! kristaps    1: #ifdef HAVE_CONFIG_H
        !             2: #include "config.h"
        !             3: #endif
        !             4:
1.1       kristaps    5: #ifdef HAVE_FGETLN
                      6:
                      7: int dummy;
                      8:
                      9: #else
                     10:
                     11: /*     $NetBSD: fgetln.c,v 1.3 2006/09/25 07:18:17 lukem Exp $ */
                     12:
                     13: /*-
                     14:  * Copyright (c) 1998 The NetBSD Foundation, Inc.
                     15:  * All rights reserved.
                     16:  *
                     17:  * This code is derived from software contributed to The NetBSD Foundation
                     18:  * by Christos Zoulas.
                     19:  *
                     20:  * Redistribution and use in source and binary forms, with or without
                     21:  * modification, are permitted provided that the following conditions
                     22:  * are met:
                     23:  * 1. Redistributions of source code must retain the above copyright
                     24:  *    notice, this list of conditions and the following disclaimer.
                     25:  * 2. Redistributions in binary form must reproduce the above copyright
                     26:  *    notice, this list of conditions and the following disclaimer in the
                     27:  *    documentation and/or other materials provided with the distribution.
                     28:  * 3. Neither the name of The NetBSD Foundation nor the names of its
                     29:  *    contributors may be used to endorse or promote products derived
                     30:  *    from this software without specific prior written permission.
                     31:  *
                     32:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     33:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     34:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     35:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     36:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     37:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     38:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     39:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     40:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     41:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     42:  * POSSIBILITY OF SUCH DAMAGE.
                     43:  */
                     44: #include <errno.h>
                     45: #include <stdio.h>
                     46: #include <stdlib.h>
                     47: #include <string.h>
                     48:
                     49: char *
                     50: fgetln(fp, len)
                     51:        FILE *fp;
                     52:        size_t *len;
                     53: {
                     54:        static char *buf = NULL;
                     55:        static size_t bufsiz = 0;
                     56:        char *ptr;
                     57:
                     58:
                     59:        if (buf == NULL) {
                     60:                bufsiz = BUFSIZ;
                     61:                if ((buf = malloc(bufsiz)) == NULL)
                     62:                        return NULL;
                     63:        }
                     64:
                     65:        if (fgets(buf, bufsiz, fp) == NULL)
                     66:                return NULL;
                     67:
                     68:        *len = 0;
                     69:        while ((ptr = strchr(&buf[*len], '\n')) == NULL) {
                     70:                size_t nbufsiz = bufsiz + BUFSIZ;
                     71:                char *nbuf = realloc(buf, nbufsiz);
                     72:
                     73:                if (nbuf == NULL) {
                     74:                        int oerrno = errno;
                     75:                        free(buf);
                     76:                        errno = oerrno;
                     77:                        buf = NULL;
                     78:                        return NULL;
                     79:                } else
                     80:                        buf = nbuf;
                     81:
                     82:                *len = bufsiz;
                     83:                if (fgets(&buf[bufsiz], BUFSIZ, fp) == NULL)
                     84:                        return buf;
                     85:
                     86:                bufsiz = nbufsiz;
                     87:        }
                     88:
                     89:        *len = (ptr - buf) + 1;
                     90:        return buf;
                     91: }
                     92:
                     93: #endif

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