mirror of
https://github.com/borgbackup/borg.git
synced 2024-12-23 08:16:54 +00:00
50 lines
No EOL
1.5 KiB
Cython
50 lines
No EOL
1.5 KiB
Cython
# -*- coding: utf-8 -*-
|
|
|
|
API_VERSION = 1
|
|
|
|
from libc.stdlib cimport free
|
|
|
|
cdef extern from "_chunker.c":
|
|
ctypedef int uint32_t
|
|
ctypedef struct Chunker:
|
|
pass
|
|
Chunker *chunker_init(object fd, int window_size, int chunk_mask, int min_size, uint32_t seed)
|
|
void chunker_free(Chunker *chunker)
|
|
object chunker_process(Chunker *chunker)
|
|
uint32_t *buzhash_init_table(uint32_t seed)
|
|
uint32_t c_buzhash "buzhash"(unsigned char *data, size_t len, uint32_t *h)
|
|
uint32_t c_buzhash_update "buzhash_update"(uint32_t sum, unsigned char remove, unsigned char add, size_t len, uint32_t *h)
|
|
|
|
|
|
cdef class chunkify:
|
|
cdef Chunker *chunker
|
|
|
|
def __cinit__(self, fd, window_size, chunk_mask, min_size, seed):
|
|
self.chunker = chunker_init(fd, window_size, chunk_mask, min_size, seed & 0xffffffff)
|
|
|
|
def __dealloc__(self):
|
|
if self.chunker:
|
|
chunker_free(self.chunker)
|
|
|
|
def __iter__(self):
|
|
return self
|
|
|
|
def __next__(self):
|
|
return chunker_process(self.chunker)
|
|
|
|
|
|
def buzhash(unsigned char *data, unsigned long seed):
|
|
cdef uint32_t *table
|
|
cdef uint32_t sum
|
|
table = buzhash_init_table(seed & 0xffffffff)
|
|
sum = c_buzhash(data, len(data), table)
|
|
free(table)
|
|
return sum
|
|
|
|
|
|
def buzhash_update(uint32_t sum, unsigned char remove, unsigned char add, size_t len, unsigned long seed):
|
|
cdef uint32_t *table
|
|
table = buzhash_init_table(seed & 0xffffffff)
|
|
sum = c_buzhash_update(sum, remove, add, len, table)
|
|
free(table)
|
|
return sum |