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authorAndrei Karas <akaras@inbox.ru>2011-01-02 01:48:38 +0200
committerAndrei Karas <akaras@inbox.ru>2011-01-02 02:41:24 +0200
commit3eeae12c498d1a4dbe969462d2ba841f77ee3ccb (patch)
treeff8eab35e732bc0749fc11677c8873a7b3a58704 /tools/tmxcopy/zlibutils.cpp
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Initial commit.
This code based on mana client http://www.gitorious.org/mana/mana and my private repository.
Diffstat (limited to 'tools/tmxcopy/zlibutils.cpp')
-rw-r--r--tools/tmxcopy/zlibutils.cpp122
1 files changed, 122 insertions, 0 deletions
diff --git a/tools/tmxcopy/zlibutils.cpp b/tools/tmxcopy/zlibutils.cpp
new file mode 100644
index 000000000..39c19aeef
--- /dev/null
+++ b/tools/tmxcopy/zlibutils.cpp
@@ -0,0 +1,122 @@
+
+#include <stdlib.h>
+#include <iostream>
+#include <cassert>
+#include <zlib.h>
+
+/**
+ * Inflates either zlib or gzip deflated memory. The inflated memory is
+ * expected to be freed by the caller.
+ */
+int
+inflateMemory(unsigned char *in, unsigned int inLength,
+ unsigned char *&out, unsigned int &outLength)
+{
+ int bufferSize = 256 * 1024;
+ int ret;
+ z_stream strm;
+
+ out = (unsigned char*) malloc(bufferSize);
+
+ strm.zalloc = Z_NULL;
+ strm.zfree = Z_NULL;
+ strm.opaque = Z_NULL;
+ strm.next_in = in;
+ strm.avail_in = inLength;
+ strm.next_out = out;
+ strm.avail_out = bufferSize;
+
+ ret = inflateInit2(&strm, 15 + 32);
+
+ if (ret != Z_OK)
+ return ret;
+
+ do
+ {
+ if (strm.next_out == NULL)
+ {
+ inflateEnd(&strm);
+ return Z_MEM_ERROR;
+ }
+
+ ret = inflate(&strm, Z_NO_FLUSH);
+ assert(ret != Z_STREAM_ERROR);
+
+ switch (ret) {
+ case Z_NEED_DICT:
+ ret = Z_DATA_ERROR;
+ case Z_DATA_ERROR:
+ case Z_MEM_ERROR:
+ (void) inflateEnd(&strm);
+ return ret;
+ }
+
+ if (ret != Z_STREAM_END)
+ {
+ out = (unsigned char*) realloc(out, bufferSize * 2);
+
+ if (out == NULL)
+ {
+ inflateEnd(&strm);
+ return Z_MEM_ERROR;
+ }
+
+ strm.next_out = out + bufferSize;
+ strm.avail_out = bufferSize;
+ bufferSize *= 2;
+ }
+ }
+ while (ret != Z_STREAM_END);
+ assert(strm.avail_in == 0);
+
+ outLength = bufferSize - strm.avail_out;
+ (void) inflateEnd(&strm);
+ return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
+}
+
+int
+inflateMemory(unsigned char *in, unsigned int inLength,
+ unsigned char *&out)
+{
+ unsigned int outLength = 0;
+ int ret = inflateMemory(in, inLength, out, outLength);
+
+ if (ret != Z_OK || out == NULL)
+ {
+ if (ret == Z_MEM_ERROR)
+ {
+ std::cerr<<"Error: Out of memory while decompressing map data!";
+ }
+ else if (ret == Z_VERSION_ERROR)
+ {
+ std::cerr<<"Error: Incompatible zlib version!";
+ }
+ else if (ret == Z_DATA_ERROR)
+ {
+ std::cerr<<"Error: Incorrect zlib compressed data!";
+ }
+ else
+ {
+ std::cerr<<"Error: Unknown error while decompressing map data!";
+ }
+
+ free(out);
+ out = NULL;
+ outLength = 0;
+ }
+
+ return outLength;
+}
+
+/*
+int
+compressMemory(unsigned char *in, unsigned int inLength,
+ unsigned char *&out, unsigned int &outLength)
+{
+ uLongf fOutLen = outLength;
+ int ret = compress((Bytef*)out, &fOutLen, (Bytef*)in, inLength);
+ outLength = fOutLen;
+
+ assert (ret == Z_OK);
+}
+*/