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/*
Copyright (c) 1996-2002 Han The Thanh, <thanh@pdftex.org>
This file is part of pdfTeX.
pdfTeX 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.
pdfTeX 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 pdfTeX; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
$Id: //depot/Build/source.development/TeX/texk/web2c/pdftexdir/writezip.c#7 $
*/
#include "ptexlib.h"
#include "zlib.h"
static const char perforce_id[] =
"$Id: //depot/Build/source.development/TeX/texk/web2c/pdftexdir/writezip.c#7 $";
#define ZIP_BUF_SIZE 32768
#define check_err(f, fn) \
if (f != Z_OK) \
pdftex_fail("zlib: %s() failed", fn)
static char zipbuf[ZIP_BUF_SIZE];
static z_stream c_stream; /* compression stream */
void writezip(boolean finish)
{
int err;
if (!getpdfcompresslevel()) {
if (pdfptr) {
pdfgone += xfwrite(pdfbuf, 1, pdfptr, pdffile);
pdfstreamlength += pdfptr;
}
return;
}
cur_file_name = NULL;
if (pdfstreamlength == 0) {
c_stream.zalloc = (alloc_func)0;
c_stream.zfree = (free_func)0;
c_stream.opaque = (voidpf)0;
check_err(deflateInit(&c_stream, getpdfcompresslevel()), "deflateInit");
c_stream.next_out = (Bytef*)zipbuf;
c_stream.avail_out = ZIP_BUF_SIZE;
}
c_stream.next_in = pdfbuf;
c_stream.avail_in = pdfptr;
for(;;) {
if (c_stream.avail_out == 0) {
pdfgone += xfwrite(zipbuf, 1, ZIP_BUF_SIZE, pdffile);
c_stream.next_out = (Bytef*)zipbuf;
c_stream.avail_out = ZIP_BUF_SIZE;
}
err = deflate(&c_stream, finish ? Z_FINISH : Z_NO_FLUSH);
if (finish && err == Z_STREAM_END)
break;
check_err(err, "deflate");
if (!finish && c_stream.avail_in == 0)
break;
}
if (finish) {
if (c_stream.avail_out < ZIP_BUF_SIZE) /* at least one byte has been output */
pdfgone += xfwrite(zipbuf, 1, ZIP_BUF_SIZE - c_stream.avail_out, pdffile);
check_err(deflateEnd(&c_stream), "deflateEnd");
xfflush(pdffile);
}
pdfstreamlength = c_stream.total_out;
}
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