Mercurial > vim
diff src/blowfish.c @ 2244:caca0ddd789b vim73
Made crypt/decrypt faster.
author | Bram Moolenaar <bram@vim.org> |
---|---|
date | Tue, 01 Jun 2010 23:37:39 +0200 |
parents | 120502692d82 |
children | 4e0124f5aee2 |
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--- a/src/blowfish.c +++ b/src/blowfish.c @@ -18,6 +18,7 @@ #define ARRAY_LENGTH(A) (sizeof(A)/sizeof(A[0])) #define BF_BLOCK 8 +#define BF_BLOCK_MASK 7 #define BF_OFB_LEN (8*(BF_BLOCK)) typedef union { @@ -563,14 +564,14 @@ bf_ofb_update(c) int bf_ranbyte() { - int current_byte = randbyte_offset++; - int current_block = (current_byte / BF_BLOCK) * BF_BLOCK; + int b; - if (randbyte_offset == BF_OFB_LEN) + if ((randbyte_offset & BF_BLOCK_MASK) == 0) + bf_e_cblock(&ofb_buffer[randbyte_offset]); + b = ofb_buffer[randbyte_offset]; + if (++randbyte_offset == BF_OFB_LEN) randbyte_offset = 0; - if ((current_byte % BF_BLOCK) == 0) - bf_e_cblock(&ofb_buffer[current_block]); - return ofb_buffer[current_byte]; + return b; } /*