patch.c File Reference

Apply a delta to an old file to generate a new file. More...

Include dependency graph for patch.c:

Go to the source code of this file.

Functions
static rs_result	rs_patch_s_cmdbyte (rs_job_t *job)
	State of trying to read the first byte of a command. More...
static rs_result	rs_patch_s_params (rs_job_t *job)
	Called after reading a command byte to pull in its parameters and then setup to execute the command. More...
static rs_result	rs_patch_s_run (rs_job_t *job)
	Called when we've read in the whole command and we need to execute it. More...
static rs_result	rs_patch_s_literal (rs_job_t *job)
	Called when trying to copy through literal data. More...
static rs_result	rs_patch_s_copy (rs_job_t *)
static rs_result	rs_patch_s_copying (rs_job_t *job)
	Called when we're executing a COPY command and waiting for all the data to be retrieved from the callback. More...
static rs_result	rs_patch_s_header (rs_job_t *job)
	Called while we're trying to read the header of the patch. More...
rs_job_t *	rs_patch_begin (rs_copy_cb *copy_cb, void *copy_arg)
	Apply a delta to a basis file to recreate the new file. More...

Detailed Description

Apply a delta to an old file to generate a new file.

Definition in file patch.c.

Function Documentation

rs_patch_s_cmdbyte()

static rs_result rs_patch_s_cmdbyte ( rs_job_t *  job )

static

State of trying to read the first byte of a command.

Once we've taken that in, we can know how much data to read to get the arguments.

Definition at line 51 of file patch.c.

rs_patch_s_params()

static rs_result rs_patch_s_params ( rs_job_t *  job )

static

Called after reading a command byte to pull in its parameters and then setup to execute the command.

Definition at line 71 of file patch.c.

rs_patch_s_run()

static rs_result rs_patch_s_run ( rs_job_t *  job )

static

Called when we've read in the whole command and we need to execute it.

Definition at line 94 of file patch.c.

rs_patch_s_literal()

static rs_result rs_patch_s_literal ( rs_job_t *  job )

static

Called when trying to copy through literal data.

Definition at line 114 of file patch.c.

rs_patch_s_copy()

static rs_result rs_patch_s_copy ( rs_job_t *  job )

static

Definition at line 132 of file patch.c.

rs_patch_s_copying()

static rs_result rs_patch_s_copying ( rs_job_t *  job )

static

Called when we're executing a COPY command and waiting for all the data to be retrieved from the callback.

Definition at line 158 of file patch.c.

rs_patch_s_header()

static rs_result rs_patch_s_header ( rs_job_t *  job )

static

Called while we're trying to read the header of the patch.

Definition at line 204 of file patch.c.

rs_patch_begin()

rs_job_t * rs_patch_begin	(	rs_copy_cb *	copy_cb,
		void *	copy_arg
	)

Apply a delta to a basis file to recreate the new file.

This gives you back a rs_job_t object, which can be cranked by calling rs_job_iter() and updating the stream pointers. When finished, call rs_job_free() to dispose of it.

Parameters

copy_cb	Callback used to retrieve content from the basis file.
copy_arg	Opaque environment pointer passed through to the callback.

Todo:

As output is produced, accumulate the MD4 checksum of the output. Then if we find a CHECKSUM command we can check it's contents against the output.

Todo:

Implement COPY commands.

See also

rs_patch_file()

Streaming API

Definition at line 221 of file patch.c.