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tr_ioRecalculateHash(): use a static buffer instead of malloc/free.

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This commit is contained in:
Charles Kerr 2008-01-27 17:03:58 +00:00
parent f32d3b24fe
commit b29ba709b3
1 changed files with 21 additions and 10 deletions
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31
libtransmission/inout.c
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@ -18,6 +18,8 @@
#include <sys/stat.h>
#include <unistd.h>
#include <openssl/sha.h>
#include "transmission.h"
#include "completion.h"
#include "crypto.h"
@ -224,25 +226,34 @@ tr_ioRecalculateHash( tr_torrent * tor,
int pieceIndex,
uint8_t * setme )
{
int n;
int ret;
uint8_t * buf;
int offset;
int bytesLeft;
uint8_t buf[4096];
const tr_info * info;
SHA_CTX sha;
assert( tor != NULL );
assert( setme != NULL );
assert( 0<=pieceIndex && pieceIndex<tor->info.pieceCount );
info = &tor->info;
n = tr_torPieceCountBytes( tor, pieceIndex );
offset = 0;
bytesLeft = tr_torPieceCountBytes( tor, pieceIndex );
SHA1_Init( &sha );
buf = tr_new( uint8_t, n );
ret = tr_ioRead( tor, pieceIndex, 0, n, buf );
if( !ret )
tr_sha1( setme, buf, n, NULL );
tr_free( buf );
while( bytesLeft > 0 )
{
const int bytesThisPass = MIN( bytesLeft, (int)sizeof(buf) );
int ret = tr_ioRead( tor, pieceIndex, offset, bytesThisPass, buf );
if( ret )
return ret;
SHA1_Update( &sha, buf, bytesThisPass );
bytesLeft -= bytesThisPass;
offset += bytesThisPass;
}
return ret;
SHA1_Final( setme, &sha );
return 0;
}
static int