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Annotation of mandoc/compat_fgetln.c, Revision 1.4

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

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