#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "qrspec.h"
#include "qrinput.h"

Classes
struct	QRspec_Capacity

Functions
int	QRspec_getDataLength (int version, QRecLevel level)
	Return maximum data code length (bytes) for the version. More...

int	QRspec_getECCLength (int version, QRecLevel level)
	Return maximum error correction code length (bytes) for the version. More...

int	QRspec_getMinimumVersion (int size, QRecLevel level)
	Return a version number that satisfies the input code length. More...

int	QRspec_getWidth (int version)
	Return the width of the symbol for the version. More...

int	QRspec_getRemainder (int version)
	Return the numer of remainder bits. More...

int	QRspec_lengthIndicator (QRencodeMode mode, int version)
	Return the size of length indicator for the mode and version. More...

int	QRspec_maximumWords (QRencodeMode mode, int version)
	Return the maximum length for the mode and version. More...

void	QRspec_getEccSpec (int version, QRecLevel level, int spec[5])
	Return an array of ECC specification. More...

static void	QRspec_putAlignmentMarker (unsigned char *frame, int width, int ox, int oy)
	Put an alignment marker. More...

static void	QRspec_putAlignmentPattern (int version, unsigned char *frame, int width)

unsigned int	QRspec_getVersionPattern (int version)
	Return BCH encoded version information pattern that is used for the symbol of version 7 or greater. More...

unsigned int	QRspec_getFormatInfo (int mask, QRecLevel level)
	Return BCH encoded format information pattern. More...

static void	putFinderPattern (unsigned char *frame, int width, int ox, int oy)
	Put a finder pattern. More...

static unsigned char *	QRspec_createFrame (int version)

unsigned char *	QRspec_newFrame (int version)
	Return a copy of initialized frame. More...

Variables
static const QRspec_Capacity	qrspecCapacity [QRSPEC_VERSION_MAX+1]
	Table of the capacity of symbols See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004. More...

static const int	lengthTableBits [4][3]

static const int	eccTable [QRSPEC_VERSION_MAX+1][4][2]
	Table of the error correction code (Reed-Solomon block) See Table 12-16 (pp.30-36), JIS X0510:2004. More...

static const int	alignmentPattern [QRSPEC_VERSION_MAX+1][2]
	Positions of alignment patterns. More...

static const unsigned int	versionPattern [QRSPEC_VERSION_MAX-6]
	Version information pattern (BCH coded). More...

static const unsigned int	formatInfo [4][8]

Function Documentation

static void putFinderPattern	(	unsigned char *	frame,
		int	width,
		int	ox,
		int	oy
	)

static

Put a finder pattern.

Parameters

frame
width
ox,oy	upper-left coordinate of the pattern

Definition at line 398 of file qrspec.c.

Referenced by QRspec_createFrame().

static unsigned char* QRspec_createFrame ( int version )

static

Definition at line 424 of file qrspec.c.

References malloc(), putFinderPattern(), QRspec_getVersionPattern(), QRspec_putAlignmentPattern(), and QRspec_Capacity::width.

Referenced by QRspec_newFrame().

int QRspec_getDataLength	(	int	version,
		QRecLevel	level
	)

Return maximum data code length (bytes) for the version.

Parameters

version	version of the symbol
level	error correction level

Returns: maximum size (bytes)

Definition at line 96 of file qrspec.c.

References QRspec_Capacity::ec, and QRspec_Capacity::words.

Referenced by QRinput_appendPaddingBit(), QRinput_splitQRinputToStruct(), and QRspec_getEccSpec().

int QRspec_getECCLength	(	int	version,
		QRecLevel	level
	)

Return maximum error correction code length (bytes) for the version.

Parameters

version	version of the symbol
level	error correction level

Returns: ECC size (bytes)

Definition at line 101 of file qrspec.c.

References QRspec_Capacity::ec.

Referenced by QRspec_getEccSpec().

void QRspec_getEccSpec	(	int	version,
		QRecLevel	level,
		int	spec[5]
	)

Return an array of ECC specification.

Parameters

version	version of the symbol
level	error correction level
spec	an array of ECC specification contains as following: {# of type1 blocks, # of data code, # of ecc code, of type2 blocks, # of data code}

Definition at line 232 of file qrspec.c.

References eccTable, QRspec_getDataLength(), and QRspec_getECCLength().

Referenced by QRraw_new().

unsigned int QRspec_getFormatInfo	(	int	mask,
		QRecLevel	level
	)

Return BCH encoded format information pattern.

Parameters

mask	mask number
level	error correction level

Returns: BCH encoded format information pattern

Definition at line 381 of file qrspec.c.

References formatInfo.

Referenced by Mask_writeFormatInformation().

int QRspec_getMinimumVersion	(	int	size,
		QRecLevel	level
	)

Return a version number that satisfies the input code length.

Parameters

size	input code length (byte)
level	error correction level

Returns: version number

Definition at line 106 of file qrspec.c.

References QRspec_Capacity::ec, QRSPEC_VERSION_MAX, and QRspec_Capacity::words.

Referenced by QRinput_convertData(), and QRinput_estimateVersion().

int QRspec_getRemainder ( int version )

Return the numer of remainder bits.

Parameters

version vesion of the symbol

Returns: number of remainder bits

Definition at line 124 of file qrspec.c.

References QRspec_Capacity::remainder.

Referenced by QRcode_encodeMask().

unsigned int QRspec_getVersionPattern ( int version )

Return BCH encoded version information pattern that is used for the symbol of version 7 or greater.

Use lower 18 bits.

Parameters

version version of the symbol

Returns: BCH encoded version information pattern

Definition at line 362 of file qrspec.c.

References QRSPEC_VERSION_MAX, and versionPattern.

Referenced by QRspec_createFrame().

int QRspec_getWidth ( int version )

Return the width of the symbol for the version.

Parameters

version vesion of the symbol

Returns: width of the symbol

Definition at line 119 of file qrspec.c.

References QRspec_Capacity::width.

Referenced by QRcode_encodeMask().

int QRspec_lengthIndicator	(	QRencodeMode	mode,
		int	version
	)

Return the size of length indicator for the mode and version.

Parameters

mode	encode mode
version	vesion of the symbol

Returns: the size of the appropriate length indicator (bits).

Definition at line 140 of file qrspec.c.

References lengthTableBits, and QRinput_isSplittableMode().

Referenced by QRinput_encodeMode8(), QRinput_encodeModeAn(), QRinput_encodeModeKanji(), QRinput_encodeModeNum(), QRinput_estimateBitStreamSizeOfEntry(), QRinput_lengthOfCode(), Split_eat8(), Split_eatAn(), and Split_eatNum().

int QRspec_maximumWords	(	QRencodeMode	mode,
		int	version
	)

Return the maximum length for the mode and version.

Parameters

mode	encode mode
version	vesion of the symbol

Returns: the maximum length (bytes)

Definition at line 156 of file qrspec.c.

References lengthTableBits, QR_MODE_KANJI, and QRinput_isSplittableMode().

Referenced by QRinput_encodeBitStream(), and QRinput_lengthOfCode().

unsigned char* QRspec_newFrame ( int version )

Return a copy of initialized frame.

Parameters

version version of the symbol

Returns: Array of unsigned char. You can free it by free().

Definition at line 507 of file qrspec.c.

References QRspec_createFrame(), and QRSPEC_VERSION_MAX.

Referenced by QRcode_encodeMask().

static void QRspec_putAlignmentMarker	(	unsigned char *	frame,
		int	width,
		int	ox,
		int	oy
	)

static

Put an alignment marker.

Parameters

frame
width
ox,oy	center coordinate of the pattern

Definition at line 285 of file qrspec.c.

Referenced by QRspec_putAlignmentPattern().

static void QRspec_putAlignmentPattern	(	int	version,
		unsigned char *	frame,
		int	width
	)

static

Definition at line 308 of file qrspec.c.

References alignmentPattern, and QRspec_putAlignmentMarker().

Referenced by QRspec_createFrame().

Variable Documentation

const int alignmentPattern[QRSPEC_VERSION_MAX+1][2]

static

Initial value:

= {
    { 0,  0},
    { 0,  0}, {18,  0}, {22,  0}, {26,  0}, {30,  0}, 
    {34,  0}, {22, 38}, {24, 42}, {26, 46}, {28, 50}, 
    {30, 54}, {32, 58}, {34, 62}, {26, 46}, {26, 48}, 
    {26, 50}, {30, 54}, {30, 56}, {30, 58}, {34, 62}, 
    {28, 50}, {26, 50}, {30, 54}, {28, 54}, {32, 58}, 
    {30, 58}, {34, 62}, {26, 50}, {30, 54}, {26, 52}, 
    {30, 56}, {34, 60}, {30, 58}, {34, 62}, {30, 54}, 
    {24, 50}, {28, 54}, {32, 58}, {26, 54}, {30, 58}, 
}

Positions of alignment patterns.

This array includes only the second and the third position of the alignment patterns. Rest of them can be calculated from the distance between them.

See Table 1 in Appendix E (pp.71) of JIS X0510:2004.

Definition at line 267 of file qrspec.c.

Referenced by QRspec_putAlignmentPattern().

const int eccTable[QRSPEC_VERSION_MAX+1][4][2]

static

Table of the error correction code (Reed-Solomon block) See Table 12-16 (pp.30-36), JIS X0510:2004.

Definition at line 188 of file qrspec.c.

Referenced by QRspec_getEccSpec().

const unsigned int formatInfo[4][8]

static

Initial value:

= {
    {0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976},
    {0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0},
    {0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed},
    {0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b}
}

Definition at line 374 of file qrspec.c.

Referenced by QRspec_getFormatInfo().

const int lengthTableBits[4][3]

static

Initial value:

= {
    {10, 12, 14},
    { 9, 11, 13},
    { 8, 16, 16},
    { 8, 10, 12}
}

Definition at line 133 of file qrspec.c.

Referenced by QRspec_lengthIndicator(), and QRspec_maximumWords().

const QRspec_Capacity qrspecCapacity[QRSPEC_VERSION_MAX+1]

static

Table of the capacity of symbols See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.

Definition at line 52 of file qrspec.c.

const unsigned int versionPattern[QRSPEC_VERSION_MAX-6]

static

Initial value:

= {
    0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
    0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
    0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
    0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
    0x27541, 0x28c69
}

Version information pattern (BCH coded).

See Table 1 in Appendix D (pp.68) of JIS X0510:2004.

Definition at line 354 of file qrspec.c.

Referenced by QRspec_getVersionPattern().

Classes

Functions

Variables

Function Documentation

of type2 blocks, # of data code}

Variable Documentation