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authorDenys Vlasenko2015-10-07 19:17:01 +0200
committerDenys Vlasenko2015-10-07 19:17:01 +0200
commit305958dbd456d463a92c1fa4c85ceb69a8c7db32 (patch)
tree19883229c6fa77b663c00ad27a33ef2bb946de10 /libbb/hash_md5_sha.c
parentec046f74a31e4315f4546ec5602f56e7d467082d (diff)
downloadbusybox-305958dbd456d463a92c1fa4c85ceb69a8c7db32.zip
busybox-305958dbd456d463a92c1fa4c85ceb69a8c7db32.tar.gz
md5sum: code shrink
For CONFIG_MD5_SMALL=1: function old new delta md5_process_block64 925 881 -44 For CONFIG_MD5_SMALL=0: function old new delta md5_process_block64 1603 1586 -17 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/hash_md5_sha.c')
-rw-r--r--libbb/hash_md5_sha.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c
index 1f63ccd..d08c6b2 100644
--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -137,7 +137,7 @@ static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
#if MD5_SMALL > 0
/* Before we start, one word to the strange constants.
They are defined in RFC 1321 as
- T[i] = (int)(4294967296.0 * fabs(sin(i))), i=1..64
+ T[i] = (int)(2^32 * fabs(sin(i))), i=1..64
*/
static const uint32_t C_array[] = {
/* round 1 */
@@ -213,7 +213,7 @@ static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
case 2:
temp += FH(B, C, D);
break;
- case 3:
+ default: /* case 3 */
temp += FI(B, C, D);
}
temp += words[(int) (*pp++)] + *pc++;
@@ -277,10 +277,6 @@ static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
#else /* MD5_SMALL == 0 or 1 */
- uint32_t A_save = A;
- uint32_t B_save = B;
- uint32_t C_save = C;
- uint32_t D_save = D;
# if MD5_SMALL == 1
const uint32_t *pc;
const char *pp;
@@ -425,10 +421,10 @@ static void FAST_FUNC md5_process_block64(md5_ctx_t *ctx)
# undef OP
# endif
/* Add checksum to the starting values */
- ctx->hash[0] = A_save + A;
- ctx->hash[1] = B_save + B;
- ctx->hash[2] = C_save + C;
- ctx->hash[3] = D_save + D;
+ ctx->hash[0] += A;
+ ctx->hash[1] += B;
+ ctx->hash[2] += C;
+ ctx->hash[3] += D;
#endif
}
#undef FF