summaryrefslogtreecommitdiff
path: root/Build/source/texk/web2c/pdftexdir/writezip.c
diff options
context:
space:
mode:
authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/pdftexdir/writezip.c
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/pdftexdir/writezip.c')
-rw-r--r--Build/source/texk/web2c/pdftexdir/writezip.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/writezip.c b/Build/source/texk/web2c/pdftexdir/writezip.c
new file mode 100644
index 00000000000..f0e62358db3
--- /dev/null
+++ b/Build/source/texk/web2c/pdftexdir/writezip.c
@@ -0,0 +1,95 @@
+/*
+Copyright 1996-2014 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 this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ptexlib.h"
+#include "zlib.h"
+#include <assert.h>
+
+#define ZIP_BUF_SIZE 32768
+
+#define check_err(f, fn) \
+ if (f != Z_OK) \
+ pdftex_fail("zlib: %s() failed (error code %d)", fn, f)
+
+static char *zipbuf = NULL;
+static z_stream c_stream; /* compression stream */
+
+void writezip(boolean finish)
+{
+ int err;
+ static int level_old = 0;
+ int level = getpdfcompresslevel();
+ assert(level > 0);
+ cur_file_name = NULL;
+ if (pdfstreamlength == 0) {
+ if (zipbuf == NULL) {
+ zipbuf = xtalloc(ZIP_BUF_SIZE, char);
+ c_stream.zalloc = (alloc_func) 0;
+ c_stream.zfree = (free_func) 0;
+ c_stream.opaque = (voidpf) 0;
+ check_err(deflateInit(&c_stream, level), "deflateInit");
+ } else {
+ if (level != level_old) { /* \pdfcompresslevel change in mid document */
+ check_err(deflateEnd(&c_stream), "deflateEnd");
+ c_stream.zalloc = (alloc_func) 0; /* these 3 lines no need, just to be safe */
+ c_stream.zfree = (free_func) 0;
+ c_stream.opaque = (voidpf) 0;
+ check_err(deflateInit(&c_stream, level), "deflateInit");
+ } else
+ check_err(deflateReset(&c_stream), "deflateReset");
+ }
+ level_old = level;
+ c_stream.next_out = (Bytef *) zipbuf;
+ c_stream.avail_out = ZIP_BUF_SIZE;
+ }
+ assert(zipbuf != NULL);
+ 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);
+ pdflastbyte = zipbuf[ZIP_BUF_SIZE - 1]; /* not needed */
+ 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);
+ pdflastbyte = zipbuf[ZIP_BUF_SIZE - c_stream.avail_out - 1];
+ }
+ xfflush(pdffile);
+ }
+ pdfstreamlength = c_stream.total_out;
+}
+
+void zip_free(void)
+{
+ if (zipbuf != NULL) {
+ check_err(deflateEnd(&c_stream), "deflateEnd");
+ free(zipbuf);
+ }
+}