Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
git/vcs-svn/svndiff.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
52 lines (43 sloc)
1.2 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* Licensed under a two-clause BSD-style license. | |
* See LICENSE for details. | |
*/ | |
#include "git-compat-util.h" | |
#include "line_buffer.h" | |
#include "svndiff.h" | |
/* | |
* svndiff0 applier | |
* | |
* See http://svn.apache.org/repos/asf/subversion/trunk/notes/svndiff. | |
* | |
* svndiff0 ::= 'SVN\0' window* | |
*/ | |
static int error_short_read(struct line_buffer *input) | |
{ | |
if (buffer_ferror(input)) | |
return error("error reading delta: %s", strerror(errno)); | |
return error("invalid delta: unexpected end of file"); | |
} | |
static int read_magic(struct line_buffer *in, off_t *len) | |
{ | |
static const char magic[] = {'S', 'V', 'N', '\0'}; | |
struct strbuf sb = STRBUF_INIT; | |
if (*len < sizeof(magic) || | |
buffer_read_binary(in, &sb, sizeof(magic)) != sizeof(magic)) | |
return error_short_read(in); | |
if (memcmp(sb.buf, magic, sizeof(magic))) | |
return error("invalid delta: unrecognized file type"); | |
*len -= sizeof(magic); | |
strbuf_release(&sb); | |
return 0; | |
} | |
int svndiff0_apply(struct line_buffer *delta, off_t delta_len, | |
struct sliding_view *preimage, FILE *postimage) | |
{ | |
assert(delta && preimage && postimage); | |
if (read_magic(delta, &delta_len)) | |
return -1; | |
if (delta_len) | |
return error("What do you think I am? A delta applier?"); | |
return 0; | |
} |