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/*
* cook - file construction tool
* Copyright (C) 1999, 2006, 2007 Peter Miller;
* All rights reserved.
*
* 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.
*
* MANIFEST: functions for reading input
*/
#include <common/input/private.h>
#include <common/mem.h>
#include <common/str.h>
#ifdef input_filename
#undef input_filename
#endif
string_ty *
input_filename(input_ty *fp)
{
return fp->vptr->filename(fp);
}
#ifdef input_read
#undef input_read
#endif
long
input_read(input_ty *fp, void *data, long len)
{
if (len <= 0)
return 0;
if (fp->pushback_len > 0)
{
fp->pushback_len--;
*(char *)data = fp->pushback_buf[fp->pushback_len];
return 1;
}
return fp->vptr->read(fp, data, len);
}
#ifdef input_getc
#undef input_getc
#endif
int
input_getc(input_ty *fp)
{
if (fp->pushback_len > 0)
{
fp->pushback_len--;
return fp->pushback_buf[fp->pushback_len];
}
return fp->vptr->get(fp);
}
#ifdef input_ungetc
#undef input_ungetc
#endif
void
input_ungetc(input_ty *fp, int c)
{
if (c < 0)
return;
if (fp->pushback_len >= fp->pushback_max)
{
fp->pushback_max = 16 + 2 * fp->pushback_max;
fp->pushback_buf = mem_change_size(fp->pushback_buf, fp->pushback_max);
}
fp->pushback_buf[fp->pushback_len++] = c;
}
void
input_delete(input_ty *fp)
{
if (fp->vptr->destruct)
fp->vptr->destruct(fp);
if (fp->pushback_buf)
mem_free(fp->pushback_buf);
fp->pushback_buf = 0;
fp->pushback_len = 0;
fp->pushback_max = 0;
fp->vptr = 0; /* paranoia */
mem_free(fp);
}
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