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| author | Jonathan Nieder <jrnieder@gmail.com> | 2011-01-02 21:10:59 -0600 |
|---|---|---|
| committer | Jonathan Nieder <jrnieder@gmail.com> | 2011-02-26 04:59:37 -0600 |
| commit | b1c9b798a6dd391aeaea31663a65164815701244 (patch) | |
| tree | adc32fa7f1f4cfaaac28c0f3017c6b247a583136 /vcs-svn/line_buffer.h | |
| parent | cb3f87cf1ba90373fdc240d65a4d65434099d9a3 (diff) | |
| download | git-b1c9b798a6dd391aeaea31663a65164815701244.tar.gz | |
vcs-svn: teach line_buffer about temporary files
It can sometimes be useful to write information temporarily to file,
to read back later. These functions allow a program to use the
line_buffer facilities when doing so.
It works like this:
1. find a unique filename with buffer_tmpfile_init.
2. rewind with buffer_tmpfile_rewind. This returns a stdio
handle for writing.
3. when finished writing, declare so with
buffer_tmpfile_prepare_to_read. The return value indicates
how many bytes were written.
4. read whatever portion of the file is needed.
5. if finished, remove the temporary file with buffer_deinit.
otherwise, go back to step 2,
The svn support would use this to buffer the postimage from delta
application until the length is known and fast-import can receive
the resulting blob.
Based-on-patch-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Diffstat (limited to 'vcs-svn/line_buffer.h')
| -rw-r--r-- | vcs-svn/line_buffer.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h index 630d83c31a..96ce966a22 100644 --- a/vcs-svn/line_buffer.h +++ b/vcs-svn/line_buffer.h @@ -15,12 +15,17 @@ struct line_buffer { int buffer_init(struct line_buffer *buf, const char *filename); int buffer_fdinit(struct line_buffer *buf, int fd); int buffer_deinit(struct line_buffer *buf); +void buffer_reset(struct line_buffer *buf); + +int buffer_tmpfile_init(struct line_buffer *buf); +FILE *buffer_tmpfile_rewind(struct line_buffer *buf); /* prepare to write. */ +long buffer_tmpfile_prepare_to_read(struct line_buffer *buf); + char *buffer_read_line(struct line_buffer *buf); char *buffer_read_string(struct line_buffer *buf, uint32_t len); int buffer_read_char(struct line_buffer *buf); void buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, uint32_t len); void buffer_copy_bytes(struct line_buffer *buf, uint32_t len); void buffer_skip_bytes(struct line_buffer *buf, uint32_t len); -void buffer_reset(struct line_buffer *buf); #endif |