encode_method_3.c File Reference

Macros
#define	pDEBUG(x, ...)

Functions
static void	c3_line_data_append (struct cm3_line *cline, uint8_t byte)
static void	c3_line_delta_overflow_append (struct cm3_line *cline, unsigned value)
static void	c3_line_delta_append (struct cm3_line *cline, unsigned offset, const uint8_t *pattern, size_t count)
static int	c3_line_flush (FILE *outstream, struct cm3_line *cline)
static void	c3_delta_loop (struct cm3_line *cline, unsigned rel_offset, unsigned count, const uint8_t *pattern)
static void	c3_line_encode (struct cm3_line *cline, const struct dlist_entry *edit, const uint8_t *pattern)
static int	hl_c3_page_encode (struct brother_doc *info)

Macro Definition Documentation

pDEBUG

#define pDEBUG	(		x,
			...
	)

Function Documentation

c3_line_data_append()

static void c3_line_data_append ( struct cm3_line *  cline, uint8_t  byte  )

static

Append a single byte to the end of the line data buffer

Parameters

[in,out]	cline	Line info
[in]	byte	The byte to append to the end of the line data buffer

Todo:

This functions is always the same in all encoding methods

c3_line_delta_overflow_append()

static void c3_line_delta_overflow_append ( struct cm3_line *  cline, unsigned  value  )

static

Add an overflow value to the line buffer

Parameters

[in,out]	cline	Line info
[in]	value	Overflow value

An overflow value is a value which is larger then the first byte in the 'delta entry' can include. An overflow value is encoded into a sequence of bytes. A byte of 255 signals more bytes follows. The sequence terminates if a byte below 0xff is found.

E.g. value = 0 -> <0x00> value = 10 -> <0x0a> value = 255 -> <0xff> <0x00> value = 256 -> <0xff> <0x01> value = 512 -> <0xff> <0xff> <0x02>

This overflow value is used to form the 'offset' and 'count' values in the 'delta entries'

Todo:

Same function like in hl_c1030_overflow_append()

c3_line_delta_append()

static void c3_line_delta_append ( struct cm3_line *  cline, unsigned  offset, const uint8_t *  pattern, size_t  count  )

static

Write one delta replacement entry

Parameters

[in,out]	cline	Line info
[in]	offset	Offset to the previous change in the line
[in]	pattern	What data to append
[in]	count	How many bytes to append (minimal 1, maximal 8)

7654 3210 ^_^^^^_ offset ^^^_______ count (encoded here is count - 1)

The encoding is like the one in hl_c1030_repeat_edit_append(), only here are no overflows allowed for the 'count' component :)

c3_line_flush()

static int c3_line_flush ( FILE *  outstream, struct cm3_line *  cline  )

static

Flush the encoded line data to the printer

Parameters

[in]	outstream	The stream to send the printer data to
[in]	cline	Line info

Return values

0	on success
-errno	if the data flushing to the printer has failed

c3_delta_loop()

static void c3_delta_loop ( struct cm3_line *  cline, unsigned  rel_offset, unsigned  count, const uint8_t *  pattern  )

static

Encode one non-matching 'edit'

Parameters

[in,out]	cline	The line to encode the printer's wire data to
[in]	rel_offset	Offset to the last write
[in]	count	Count of bytes to write
[in]	pattern	Start of the pattern to write

c3_line_encode()

static void c3_line_encode ( struct cm3_line *  cline, const struct dlist_entry *  edit, const uint8_t *  pattern  )

static

Encode all non-matching 'edits' in a line

Parameters

[in,out]	cline	The line to encode the printer's wire data to
[in]	edit	The start 'edit' in the line (can be NULL, but should not)
[in]	pattern	Start of the pattern to write

hl_c3_page_encode()

static int hl_c3_page_encode ( struct brother_doc *  info )

static

Encode the full page according to the 1030 method

Parameters

[in,out]

info

Job info

Return values

0	on success
-errno	on failures