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authorTom Sepez <tsepez@chromium.org>2015-06-19 12:57:10 -0700
committerTom Sepez <tsepez@chromium.org>2015-06-19 12:57:10 -0700
commit6f93de501d591a6c2980d38a1ff0a6b5e434b80a (patch)
treeebcf5e9817911e84b25c9f975ca8e0679d736b07 /third_party/zlib_v128/uncompr.c
parent6fd997b710e96e0c66d6dcd2e1c5cfd950d6accd (diff)
downloadpdfium-6f93de501d591a6c2980d38a1ff0a6b5e434b80a.tar.xz
Merge to XFA: Move zlib to third_party/
(cherry picked from commit 959eb05140a8f5af7724a2da4cf5d04e2e50f4a6) Original Review URL: https://codereview.chromium.org/1197693003. TBR=thestig@chromium.org Review URL: https://codereview.chromium.org/1197863002.
Diffstat (limited to 'third_party/zlib_v128/uncompr.c')
-rw-r--r--third_party/zlib_v128/uncompr.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/third_party/zlib_v128/uncompr.c b/third_party/zlib_v128/uncompr.c
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+++ b/third_party/zlib_v128/uncompr.c
@@ -0,0 +1,59 @@
+/* uncompr.c -- decompress a memory buffer
+ * Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#define ZLIB_INTERNAL
+#include "zlib.h"
+
+/* ===========================================================================
+ Decompresses the source buffer into the destination buffer. sourceLen is
+ the byte length of the source buffer. Upon entry, destLen is the total
+ size of the destination buffer, which must be large enough to hold the
+ entire uncompressed data. (The size of the uncompressed data must have
+ been saved previously by the compressor and transmitted to the decompressor
+ by some mechanism outside the scope of this compression library.)
+ Upon exit, destLen is the actual size of the compressed buffer.
+
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
+ buffer, or Z_DATA_ERROR if the input data was corrupted.
+*/
+int ZEXPORT uncompress (
+ Bytef *dest,
+ uLongf *destLen,
+ const Bytef *source,
+ uLong sourceLen)
+{
+ z_stream stream;
+ int err;
+
+ stream.next_in = (z_const Bytef *)source;
+ stream.avail_in = (uInt)sourceLen;
+ /* Check for source > 64K on 16-bit machine: */
+ if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+
+ stream.next_out = dest;
+ stream.avail_out = (uInt)*destLen;
+ if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+
+ err = inflateInit(&stream);
+ if (err != Z_OK) return err;
+
+ err = inflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END) {
+ inflateEnd(&stream);
+ if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
+ return Z_DATA_ERROR;
+ return err;
+ }
+ *destLen = stream.total_out;
+
+ err = inflateEnd(&stream);
+ return err;
+}