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Windows: Reduce the size of installers by almost 50% by using LZMA compression instead of DEFLATE

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This commit is contained in:
Mounir IDRASSI
2022-02-09 23:47:25 +01:00
parent 302dc37fb9
commit 1ef05f24e2
41 changed files with 13661 additions and 117 deletions
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44
src/Setup/SelfExtract.c
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@@ -22,6 +22,7 @@
#include "Dir.h"
#include "Language.h"
#include "Resource.h"
#include "LzmaLib.h"
#include <tchar.h>
#include <Strsafe.h>
@@ -94,24 +95,43 @@ static void PkgInfo (wchar_t *msg)
// Returns 0 if decompression fails or, if successful, returns the size of the decompressed data
static int DecompressBuffer (unsigned char *out, int outSize, unsigned char *in, int len)
{
uLongf outlen = (uLongf) outSize;
int ret = uncompress (out, &outlen, in, (uLong) len);
if (Z_OK == ret)
return (int) outlen;
else
return 0;
int outlen = 0;
int status;
if (len > 5)
{
// the first 5 bytes of in contain props parameter
size_t srcLen = len - 5;
size_t outputLen = (size_t) outSize;
status = LzmaUncompress (out, &outputLen, in + 5, &srcLen, in, 5);
if (status == SZ_OK)
{
outlen = (int) outputLen;
}
}
return outlen;
}
// Returns 0 if compression fails or, if successful, the size of the compressed data
static int CompressBuffer (unsigned char *out, int outSize, unsigned char *in, int len)
{
uLongf outlen = (uLongf) outSize;
int ret = compress2 (out, &outlen, in, (uLong) len, Z_BEST_COMPRESSION);
if (Z_OK == ret)
return (int) outlen;
else
return 0;
unsigned char outProps[5];
size_t outPropsSize = 5;
int outlen = 0;
int status;
if (outSize > 5)
{
size_t outputLen = (size_t) (outSize - 5);
status = LzmaCompress (out + 5, &outputLen, in, len, outProps, &outPropsSize, 9, 0, -1, -1, -1, -1, -1);
if (status == SZ_OK)
{
memcpy (out, outProps, outPropsSize);
outlen = (int) (outputLen + 5);
}
}
return outlen;
}