Forgot to git add so missed a bunch of stuff

common/compression.cpp

@@ -0,0 +1,82 @@
+#include "global_define.h"
+#include "types.h"
+#include <string.h>
+#include <zlib.h>
+
+namespace EQEmu
+{
+	uint32 EstimateDeflateBuffer(uint32 len) {
+		z_stream zstream;
+		memset(&zstream, 0, sizeof(zstream));
+
+		zstream.zalloc = Z_NULL;
+		zstream.zfree = Z_NULL;
+		zstream.opaque = Z_NULL;
+		if (deflateInit(&zstream, Z_FINISH) != Z_OK)
+			return 0;
+
+		return deflateBound(&zstream, len);
+	}
+
+	uint32 DeflateData(const char *buffer, uint32 len, char *out_buffer, uint32 out_len_max) {
+		z_stream zstream;
+		memset(&zstream, 0, sizeof(zstream));
+		int zerror;
+
+		zstream.next_in = const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer));
+		zstream.avail_in = len;
+		zstream.zalloc = Z_NULL;
+		zstream.zfree = Z_NULL;
+		zstream.opaque = Z_NULL;
+		deflateInit(&zstream, Z_FINISH);
+
+		zstream.next_out = reinterpret_cast<unsigned char*>(out_buffer);
+		zstream.avail_out = out_len_max;
+		zerror = deflate(&zstream, Z_FINISH);
+
+		if (zerror == Z_STREAM_END)
+		{
+			deflateEnd(&zstream);
+			return (uint32)zstream.total_out;
+		}
+		else
+		{
+			zerror = deflateEnd(&zstream);
+			return 0;
+		}
+	}
+
+	uint32 InflateData(const char* buffer, uint32 len, char* out_buffer, uint32 out_len_max) {
+		z_stream zstream;
+		int zerror = 0;
+		int i;
+
+		zstream.next_in = const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer));
+		zstream.avail_in = len;
+		zstream.next_out = reinterpret_cast<unsigned char*>(out_buffer);;
+		zstream.avail_out = out_len_max;
+		zstream.zalloc = Z_NULL;
+		zstream.zfree = Z_NULL;
+		zstream.opaque = Z_NULL;
+
+		i = inflateInit2(&zstream, 15);
+		if (i != Z_OK) {
+			return 0;
+		}
+
+		zerror = inflate(&zstream, Z_FINISH);
+		if (zerror == Z_STREAM_END) {
+			inflateEnd(&zstream);
+			return zstream.total_out;
+		}
+		else {
+			if (zerror == -4 && zstream.msg == 0)
+			{
+				return 0;
+			}
+
+			zerror = inflateEnd(&zstream);
+			return 0;
+		}
+	}
+}

common/compression.h

@@ -0,0 +1,8 @@
+#pragma once
+
+namespace EQEmu
+{
+	uint32 EstimateDeflateBuffer(uint32 len);
+	uint32 DeflateData(const char *buffer, uint32 len, char *out_buffer, uint32 out_len_max);
+	uint32 InflateData(const char* buffer, uint32 len, char* out_buffer, uint32 out_len_max);
+}