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/*
* linebuf.cc: Part of GNU CSSC.
*
* Copyright (C) 1997,1998, Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*
* CSSC was originally Based on MySC, by Ross Ridge, which was
* placed in the Public Domain.
*
*
* Members of the class cssc_linebuf.
*
*/
#ifdef __GNUC__
//#pragma implementation "linebuf.h"
#endif
#include "cssc.h"
#include "linebuf.h"
// Use a small chunk size for testing...
#define CONFIG_LINEBUF_CHUNK_SIZE (1024)
#ifdef CONFIG_SCCS_IDS
static const char rcs_id[] = "CSSC $Id: linebuf.cc,v 1.15 2003/12/13 15:11:56 james_youngman Exp $";
#endif
cssc_linebuf::cssc_linebuf()
: buf(new char[CONFIG_LINEBUF_CHUNK_SIZE]),
buflen(CONFIG_LINEBUF_CHUNK_SIZE)
{
}
int
cssc_linebuf::read_line(FILE *f)
{
buf[buflen - 2] = '\0';
char *s = fgets(buf, buflen, f);
while (s != NULL)
{
char c = buf[buflen - 2];
if (c == '\0' || c == '\n')
return 0;
//
// Add another chunk
//
char *temp_buf = new char[CONFIG_LINEBUF_CHUNK_SIZE + buflen];
memcpy( temp_buf, buf, buflen*sizeof( char));
delete [] buf;
buf = temp_buf;
s = buf + buflen - 1;
buflen += CONFIG_LINEBUF_CHUNK_SIZE;
buf[buflen - 2] = '\0';
s = fgets(s, CONFIG_LINEBUF_CHUNK_SIZE + 1, f); // fill the new chunk
}
return 1;
}
int cssc_linebuf::write(FILE *f) const
{
size_t len = strlen(buf);
return fwrite_failed(fwrite(buf, sizeof(char), len, f), len);
}
int
cssc_linebuf::split(int offset, char **args, int len, char c)
{
char *start = buf + offset;
char *end = strchr(start, c);
int i;
for (i = 0; i < len; i++)
{
args[i] = start;
if (0 == end)
{
if (start[0] != '\0')
i++;
return i; // no more delimiters.
}
*end++ = '\0';
start = end;
end = strchr(start, c);
}
return i;
}
void cssc_linebuf::
set_char(unsigned offset, char value)
{
ASSERT(offset < buflen);
buf[offset] = value;
}
/* Local variables: */
/* mode: c++ */
/* End: */
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