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improved FIO_decompressGzFrame

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This commit is contained in:
Przemyslaw Skibinski 2016-12-05 15:58:23 +01:00
parent 8489f184f6
commit 3c69760275
1 changed files with 9 additions and 8 deletions
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17
programs/fileio.c
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@ -652,7 +652,6 @@ static unsigned FIO_passThrough(FILE* foutput, FILE* finput, void* buffer, size_
#ifdef ZSTD_GZDECOMPRESS
static unsigned long long FIO_decompressGzFrame(dRess_t ress, FILE* srcFile, const char* srcFileName, size_t alreadyLoaded)
{
unsigned char* headBuf = (unsigned char*)ress.srcBuffer;
unsigned long long outFileSize = 0;
z_stream strm;
@ -667,15 +666,15 @@ static unsigned long long FIO_decompressGzFrame(dRess_t ress, FILE* srcFile, con
strm.avail_out = ress.dstBufferSize;
for ( ; ; ) {
unsigned char in[1];
if (alreadyLoaded) {
alreadyLoaded--;
in[0] = *headBuf++;
strm.avail_in = alreadyLoaded;
strm.next_in = (z_const unsigned char*)ress.srcBuffer;
alreadyLoaded = 0;
} else {
if (fread(in, 1, 1, srcFile) == 0) break;
if (fread(ress.srcBuffer, 1, 1/*ress.srcBufferSize*/, srcFile) == 0) break;
strm.next_in = (z_const unsigned char*)ress.srcBuffer;
strm.avail_in = 1;
}
strm.next_in = in;
strm.avail_in = 1;
{ int const ret = inflate(&strm, Z_NO_FLUSH);
if (ret == Z_STREAM_END) break;
if (ret != Z_OK) { DISPLAY("zstd: %s: inflate error %d \n", srcFileName, ret); return 0; }
@ -726,11 +725,11 @@ static int FIO_decompressSrcFile(dRess_t ress, const char* dstFileName, const ch
}
readSomething = 1; /* there is at least >= 4 bytes in srcFile */
if (sizeCheck != toRead) { DISPLAY("zstd: %s: unknown header \n", srcFileName); fclose(srcFile); return 1; } /* srcFileName is empty */
printf("buf[0]=%d buf[1]=%d toRead=%d\n", buf[0], buf[1], (int)toRead);
if (buf[0] == 31 && buf[1] == 139) { /* gz header */
#ifdef ZSTD_GZDECOMPRESS
unsigned long long const result = FIO_decompressGzFrame(ress, srcFile, srcFileName, toRead);
if (result == 0) return 1;
printf("gzip=%d\n", (int)result);
filesize += result;
#else
DISPLAYLEVEL(1, "zstd: %s: gzip file cannot be uncompressed (zstd compiled without ZSTD_GZDECOMPRESS) -- ignored \n", srcFileName);
@ -740,6 +739,7 @@ static int FIO_decompressSrcFile(dRess_t ress, const char* dstFileName, const ch
if (!ZSTD_isFrame(ress.srcBuffer, toRead)) {
if ((g_overwrite) && !strcmp (dstFileName, stdoutmark)) { /* pass-through mode */
unsigned const result = FIO_passThrough(ress.dstFile, srcFile, ress.srcBuffer, ress.srcBufferSize);
printf("pass-through=%d\n", (int)result);
if (fclose(srcFile)) EXM_THROW(32, "zstd: %s close error", srcFileName); /* error should never happen */
return result;
} else {
@ -748,6 +748,7 @@ static int FIO_decompressSrcFile(dRess_t ress, const char* dstFileName, const ch
return 1;
} }
filesize += FIO_decompressFrame(ress, srcFile, toRead, filesize);
printf("zstd filesize=%d\n", (int)filesize);
}
}