82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/* getlin.c
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Replacement for getline.
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Copyright (C) 1992 Ian Lance Taylor
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This file is part of Taylor UUCP.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License
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as published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Infinity Development Systems, P.O. Box 520, Waltham, MA 02254.
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*/
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#include "uucp.h"
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/* Read a line from a file, returning the number of characters read.
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This should really return ssize_t. Returns -1 on error. */
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#define CGETLINE_DEFAULT (63)
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int
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getline (pzline, pcline, e)
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char **pzline;
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size_t *pcline;
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FILE *e;
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{
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char *zput, *zend;
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int bchar;
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if (*pzline == NULL)
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{
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*pzline = (char *) malloc (CGETLINE_DEFAULT);
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if (*pzline == NULL)
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return -1;
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*pcline = CGETLINE_DEFAULT;
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}
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zput = *pzline;
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zend = *pzline + *pcline - 1;
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while ((bchar = getc (e)) != EOF)
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{
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if (zput >= zend)
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{
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size_t cnew;
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char *znew;
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cnew = *pcline * 2 + 1;
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znew = (char *) realloc ((pointer) *pzline, cnew);
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if (znew == NULL)
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return -1;
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zput = znew + *pcline - 1;
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zend = znew + cnew - 1;
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*pzline = znew;
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*pcline = cnew;
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}
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*zput++ = bchar;
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if (bchar == '\n')
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break;
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}
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if (zput == *pzline)
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return -1;
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*zput = '\0';
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return zput - *pzline;
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}
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