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/*
TiMidity++ -- MIDI to WAVE converter and player
Copyright (C) 1999,2000 Masanao Izumo <mo@goice.co.jp>
Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <stdlib.h>
#include "timidity.h"
#include "url.h"
#include "mblock.h"
#include "zip.h"
typedef struct _URL_inflate
{
char common[sizeof(struct _URL)];
InflateHandler decoder;
URL instream;
long compsize;
long pos;
int autoclose;
} URL_inflate;
static long url_inflate_read_func(char *buf, long size, void *v);
static long url_inflate_read(URL url, void *buff, long n);
static long url_inflate_tell(URL url);
static void url_inflate_close(URL url);
URL url_inflate_open(URL instream, long compsize, int autoclose)
{
URL_inflate *url;
url = (URL_inflate *)alloc_url(sizeof(URL_inflate));
if(url == NULL)
{
if(autoclose)
url_close(instream);
url_errno = errno;
return NULL;
}
/* common members */
URLm(url, type) = URL_inflate_t;
URLm(url, url_read) = url_inflate_read;
URLm(url, url_gets) = NULL;
URLm(url, url_fgetc) = NULL;
URLm(url, url_seek) = NULL;
URLm(url, url_tell) = url_inflate_tell;
URLm(url, url_close) = url_inflate_close;
/* private members */
url->decoder = NULL;
url->instream = instream;
url->pos = 0;
url->compsize = compsize;
url->autoclose = autoclose;
errno = 0;
url->decoder = open_inflate_handler(url_inflate_read_func, url);
if(url->decoder == NULL)
{
if(autoclose)
url_close(instream);
url_inflate_close((URL)url);
url_errno = errno;
return NULL;
}
return (URL)url;
}
static long url_inflate_read_func(char *buf, long size, void *v)
{
URL_inflate *urlp = (URL_inflate *)v;
long n;
if(urlp->compsize == -1) /* size if unknown */
return url_read(urlp->instream, buf, size);
if(urlp->compsize == 0)
return 0;
n = size;
if(n > urlp->compsize)
n = urlp->compsize;
n = url_read(urlp->instream, buf, n);
if(n == -1)
return -1;
urlp->compsize -= n;
return n;
}
static long url_inflate_read(URL url, void *buff, long n)
{
URL_inflate *urlp = (URL_inflate *)url;
n = zip_inflate(urlp->decoder, (char *)buff, n);
if(n <= 0)
return n;
urlp->pos += n;
return n;
}
static long url_inflate_tell(URL url)
{
return ((URL_inflate *)url)->pos;
}
static void url_inflate_close(URL url)
{
int save_errno = errno;
URL_inflate *urlp = (URL_inflate *)url;
if(urlp->decoder)
close_inflate_handler(urlp->decoder);
if(urlp->autoclose)
url_close(urlp->instream);
free(url);
errno = save_errno;
}
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