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author | Andrew Tridgell <tridge@samba.org> | 1996-07-02 03:19:58 +0000 |
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committer | Andrew Tridgell <tridge@samba.org> | 1996-07-02 03:19:58 +0000 |
commit | 9e31c4824cabb1bf173f87cbd0abe93f25ea9598 (patch) | |
tree | 41da9f321c5598db22b5f5eb8d2f69b6d58961ba /checksum.c | |
parent | c6e7fcb42bc87660ece8d4dc9a1b10bd1fb7b0c5 (diff) | |
download | rsync-9e31c4824cabb1bf173f87cbd0abe93f25ea9598.tar.gz |
added resend logic
added checksum on all files
Diffstat (limited to 'checksum.c')
-rw-r--r-- | checksum.c | 56 |
1 files changed, 53 insertions, 3 deletions
@@ -83,7 +83,8 @@ void get_checksum2(char *buf,int len,char *sum) for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) { MDupdate(&MD, buf1+i, CSUM_CHUNK*8); } - MDupdate(&MD, buf1+i, (len-i)*8); + if (len - i > 0) + MDupdate(&MD, buf1+i, (len-i)*8); sum_put(&MD,sum); } @@ -112,8 +113,10 @@ void file_checksum(char *fname,char *sum,off_t size) MDupdate(&MD, tmpchunk, CSUM_CHUNK*8); } - bcopy(map_ptr(buf,i,len-i),tmpchunk,len-i); - MDupdate(&MD, tmpchunk, (len-i)*8); + if (len - i > 0) { + bcopy(map_ptr(buf,i,len-i),tmpchunk,len-i); + MDupdate(&MD, tmpchunk, (len-i)*8); + } sum_put(&MD,sum); @@ -127,6 +130,53 @@ void checksum_init(void) } + +static MDstruct sumMD; +static int sumresidue; +static char sumrbuf[CSUM_CHUNK]; + +void sum_init(void) +{ + MDbegin(&sumMD); + sumresidue=0; +} + +void sum_update(char *p,int len) +{ + int i; + if (sumresidue) { + i = MIN(CSUM_CHUNK-sumresidue,len); + bcopy(p,sumrbuf+sumresidue,i); + MDupdate(&sumMD, sumrbuf, (i+sumresidue)*8); + len -= i; + p += i; + } + + for(i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) { + bcopy(p+i,sumrbuf,CSUM_CHUNK); + MDupdate(&sumMD, sumrbuf, CSUM_CHUNK*8); + } + + if (len - i > 0) { + sumresidue = len-i; + bcopy(p+i,sumrbuf,sumresidue); + } else { + sumresidue = 0; + } +} + +void sum_end(char *sum) +{ + if (sumresidue) + MDupdate(&sumMD, sumrbuf, sumresidue*8); + + SIVAL(sum,0,sumMD.buffer[0]); + SIVAL(sum,4,sumMD.buffer[1]); + SIVAL(sum,8,sumMD.buffer[2]); + SIVAL(sum,12,sumMD.buffer[3]); +} + + #ifdef CHECKSUM_MAIN int main(int argc,char *argv[]) { |