67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/* lib/fgetln.c - bsd-games implementation of fgetln.
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*
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* Copyright (c) 1997, 1998, 1999, 2000, 2004 Joseph Samuel Myers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef HAVE_fgetln
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char *
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fgetln(FILE *stream, size_t *len)
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{
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static char *buf = NULL;
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static size_t buflen = 0;
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char *res;
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char *nbuf;
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if (buf == NULL) {
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buf = (char *)malloc(buflen = 1024);
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if (buf == NULL) {
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return NULL;
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}
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}
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buf[buflen - 1] = 1;
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res = fgets(buf, buflen, stream);
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if (res == NULL)
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return NULL;
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while (buf[buflen - 1] == 0 && buf[buflen - 2] != '\n') { /* long line */
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nbuf = realloc(buf, buflen * 2);
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if (nbuf == NULL)
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return NULL;
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buf = nbuf;
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buflen *= 2;
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buf[buflen - 1] = 1;
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res = fgets(buf + buflen/2 - 1, buflen/2 + 1, stream);
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if (res == NULL)
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return NULL;
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}
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*len = strlen(buf);
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return buf;
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}
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#endif /* !defined(HAVE_fgetln) */
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