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/*
* delta.h: private delta library things
*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
/* ==================================================================== */
#include <apr_pools.h>
#include <apr_hash.h>
#include "svn_delta.h"
#ifndef SVN_LIBSVN_DELTA_H
#define SVN_LIBSVN_DELTA_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Private interface for text deltas. */
/* The standard size of one svndiff window. */
#define SVN_DELTA_WINDOW_SIZE 102400
/* Context/baton for building an operation sequence. */
typedef struct svn_txdelta__ops_baton_t {
int num_ops; /* current number of ops */
int src_ops; /* current number of source copy ops */
int ops_size; /* number of ops allocated */
svn_txdelta_op_t *ops; /* the operations */
svn_stringbuf_t *new_data; /* any new data used by the operations */
} svn_txdelta__ops_baton_t;
/* Insert a delta op into the delta window being built via BUILD_BATON. If
OPCODE is svn_delta_new, bytes from NEW_DATA are copied into the window
data and OFFSET is ignored. Otherwise NEW_DATA is ignored. All
allocations are performed in POOL. */
void svn_txdelta__insert_op(svn_txdelta__ops_baton_t *build_baton,
enum svn_delta_action opcode,
apr_size_t offset,
apr_size_t length,
const char *new_data,
apr_pool_t *pool);
/* Remove / truncate the last delta ops spanning the last MAX_LEN bytes
from the delta window being built via BUILD_BATON starting. Return the
number of bytes that were actually removed. */
apr_size_t
svn_txdelta__remove_copy(svn_txdelta__ops_baton_t *build_baton,
apr_size_t max_len);
/* Allocate a delta window from POOL. */
svn_txdelta_window_t *
svn_txdelta__make_window(const svn_txdelta__ops_baton_t *build_baton,
apr_pool_t *pool);
/* Create xdelta window data. Allocate temporary data from POOL. */
void svn_txdelta__xdelta(svn_txdelta__ops_baton_t *build_baton,
const char *start,
apr_size_t source_len,
apr_size_t target_len,
apr_pool_t *pool);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* SVN_LIBSVN_DELTA_H */
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