csUnicodeTransform Class Reference
[Utilities]

Contains functions to convert between several UTF encodings. More...

#include <csutil/csuctransform.h>

List of all members.

Static Public Member Functions

UTF Decoders

static int Decode (const utf32_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-32.

static int Decode (const utf16_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-16.

static int Decode (const utf8_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-8.

static int UTF16Decode (const utf16_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-16.

static int UTF32Decode (const utf32_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-32.

static int UTF8Decode (const utf8_char *str, size_t strlen, utf32_char &ch, bool *isValid=0, bool returnNonChar=false)

Decode an Unicode code point encoded in UTF-8.

UTF Encoders

static int Encode (const utf32_char ch, utf32_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-32.

static int Encode (const utf32_char ch, utf16_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-16.

static int Encode (const utf32_char ch, utf8_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-8.

static int EncodeUTF16 (const utf32_char ch, utf16_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-16.

static int EncodeUTF32 (const utf32_char ch, utf32_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-32.

static int EncodeUTF8 (const utf32_char ch, utf8_char *buf, size_t bufsize, bool allowNonchars=false)

Encode an Unicode code point to UTF-8.

Code point mappings

static size_t MapToFold (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)

Map a code point to its fold equivalent(s).

static size_t MapToLower (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)

Map a code point to its lower case equivalent(s).

static size_t MapToUpper (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)

Map a code point to its upper case equivalent(s).

Helpers to skip encoded code units in different UTF encodings

static int UTF16Rewind (const utf16_char *str, size_t maxRew)

Determine how many code units in an UTF-16 buffer need to skipped back to get to the start of the previous encoded code point.

static int UTF16Skip (const utf16_char *str, size_t maxSkip)

Determine how many code units in an UTF-16 buffer need to be skipped to get to the next encoded char.

static int UTF32Rewind (const utf32_char *str, size_t maxRew)

Determine how many code units in an UTF-32 buffer need to skipped back to get to the start of the previous encoded code point.

static int UTF32Skip (const utf32_char *str, size_t maxSkip)

Determine how many code units in an UTF-32 buffer need to be skipped to get to the next encoded char.

static int UTF8Rewind (const utf8_char *str, size_t maxRew)

Determine how many code units in an UTF-8 buffer need to skipped back to get to the start of the previous encoded code point.

static int UTF8Skip (const utf8_char *str, size_t maxSkip)

Determine how many code units in an UTF-8 buffer need to be skipped to get to the next encoded char.

Converters between strings in different UTF encodings

static size_t UTF16to32 (utf32_char *dest, size_t destSize, const utf16_char *source, size_t srcSize=(size_t)-1)

Convert UTF-16 to UTF-32.

static size_t UTF16to8 (utf8_char *dest, size_t destSize, const utf16_char *source, size_t srcSize=(size_t)-1)

Convert UTF-16 to UTF-8.

static size_t UTF32to16 (utf16_char *dest, size_t destSize, const utf32_char *source, size_t srcSize=(size_t)-1)

Convert UTF-32 to UTF-16.

static size_t UTF32to8 (utf8_char *dest, size_t destSize, const utf32_char *source, size_t srcSize=(size_t)-1)

Convert UTF-32 to UTF-8.

static size_t UTF8to16 (utf16_char *dest, size_t destSize, const utf8_char *source, size_t srcSize=(size_t)-1)

Convert UTF-8 to UTF-16.

static size_t UTF8to32 (utf32_char *dest, size_t destSize, const utf8_char *source, size_t srcSize=(size_t)-1)

Convert UTF-8 to UTF-32.

Detailed Description

Contains functions to convert between several UTF encodings.

Definition at line 79 of file csuctransform.h.

Member Function Documentation

static int csUnicodeTransform::Decode	(	const utf32_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-32.

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 295 of file csuctransform.h.

static int csUnicodeTransform::Decode	(	const utf16_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-16.

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 286 of file csuctransform.h.

static int csUnicodeTransform::Decode	(	const utf8_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 277 of file csuctransform.h.

Referenced by csG2DDrawText< Tpixel, Tpixmixer1, Tpixmixer2, Tpixmixer3 >::DrawText(), and csFmtDefaultReader< T >::GetNext().

static int csUnicodeTransform::Encode	(	const utf32_char	ch,
		utf32_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-32.

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 455 of file csuctransform.h.

static int csUnicodeTransform::Encode	(	const utf32_char	ch,
		utf16_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-16.

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 446 of file csuctransform.h.

static int csUnicodeTransform::Encode	(	const utf32_char	ch,
		utf8_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 437 of file csuctransform.h.

Referenced by csFmtDefaultWriter< T >::Put().

static int csUnicodeTransform::EncodeUTF16	(	const utf32_char	ch,
		utf16_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-16.

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 388 of file csuctransform.h.

References CS_UC_CHAR_HIGH_SURROGATE_FIRST, CS_UC_CHAR_LOW_SURROGATE_FIRST, CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, CS_UC_LAST_CHAR, and OUTPUT_CHAR.

static int csUnicodeTransform::EncodeUTF32	(	const utf32_char	ch,
		utf32_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-32.

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 419 of file csuctransform.h.

References CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, CS_UC_LAST_CHAR, and OUTPUT_CHAR.

static int csUnicodeTransform::EncodeUTF8	(	const utf32_char	ch,
		utf8_char *	buf,
		size_t	bufsize,
		bool	allowNonchars = `false`
	)			`[inline, static]`

Encode an Unicode code point to UTF-8.

Parameters:

	ch	Code point to encode.
	buf	Pointer to the buffer receiving the encoded code point.
	bufsize	Number of code units that fit in buf.
	allowNonchars	Whether non-character or high and low surrogates are encoded. Normally, those code points are rejected to prevent the generation of invalid encoded strings.

Returns:: The number of code units needed to encode ch.

Remarks:: The buffer will be filled up as much as possible. Check the returned value whether the encoded code point completely fit into the buffer.

Definition at line 331 of file csuctransform.h.

References CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, CS_UC_LAST_CHAR, and OUTPUT_CHAR.

static size_t csUnicodeTransform::MapToFold	(	const utf32_char	ch,
		utf32_char *	dest,
		size_t	destSize,
		uint	flags = `0`
	)			`[static]`

Map a code point to its fold equivalent(s).

Fold mapping is useful for binary comparison of two Unicode strings. Map a code point to its upper case equivalent(s).

Parameters:

	ch	Code point to be mapped.
	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	flags	Flags to control the result of the mapping. Currently supported is csUcMapSimple.

Returns:: Number of code units the complete mapping result would require.

static size_t csUnicodeTransform::MapToLower	(	const utf32_char	ch,
		utf32_char *	dest,
		size_t	destSize,
		uint	flags = `0`
	)			`[static]`

Map a code point to its lower case equivalent(s).

Map a code point to its upper case equivalent(s).

Parameters:

	ch	Code point to be mapped.
	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	flags	Flags to control the result of the mapping. Currently supported is csUcMapSimple.

Returns:: Number of code units the complete mapping result would require.

static size_t csUnicodeTransform::MapToUpper	(	const utf32_char	ch,
		utf32_char *	dest,
		size_t	destSize,
		uint	flags = `0`
	)			`[static]`

Map a code point to its upper case equivalent(s).

Parameters:

	ch	Code point to be mapped.
	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	flags	Flags to control the result of the mapping. Currently supported is csUcMapSimple.

Returns:: Number of code units the complete mapping result would require.

static int csUnicodeTransform::UTF16Decode	(	const utf16_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-16.

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 214 of file csuctransform.h.

References CS_UC_IS_HIGH_SURROGATE, CS_UC_IS_LOW_SURROGATE, CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, FAIL, GET_NEXT, and SUCCEED.

static int csUnicodeTransform::UTF16Rewind	(	const utf16_char *	str,
		size_t	maxRew
	)			`[inline, static]`

Determine how many code units in an UTF-16 buffer need to skipped back to get to the start of the previous encoded code point.

Determine how many code units in an UTF-8 buffer need to skipped back to get to the start of the previous encoded code point.

Parameters:

	str	Pointer to the encoded code point after the code point that is actually to be skipped back.
	maxRew	The number of code units to go back at max. Typically, this is the number of chars from str to the start of the buffer.

Returns:: Number of chars to skip back in the buffer. Returns 0 if maxRew is 0.

Definition at line 939 of file csuctransform.h.

References CS_UC_IS_HIGH_SURROGATE, and CS_UC_IS_SURROGATE.

static int csUnicodeTransform::UTF16Skip	(	const utf16_char *	str,
		size_t	maxSkip
	)			`[inline, static]`

Determine how many code units in an UTF-16 buffer need to be skipped to get to the next encoded char.

Determine how many code units in an UTF-8 buffer need to be skipped to get to the next encoded char.

Parameters:

	str	Pointer to buffer with encoded code point.
	maxSkip	The number of code units to skip at max. Usually, this is the number of chars from str to the end of the buffer.

Returns:: Number of chars to skip in the buffer. Returns 0 if maxSkip is 0.

Definition at line 926 of file csuctransform.h.

References CS_UC_IS_HIGH_SURROGATE.

static size_t csUnicodeTransform::UTF16to32	(	utf32_char *	dest,
		size_t	destSize,
		const utf16_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-16 to UTF-32.

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 549 of file csuctransform.h.

static size_t csUnicodeTransform::UTF16to8	(	utf8_char *	dest,
		size_t	destSize,
		const utf16_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-16 to UTF-8.

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 544 of file csuctransform.h.

static int csUnicodeTransform::UTF32Decode	(	const utf32_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-32.

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 257 of file csuctransform.h.

References CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, CS_UC_LAST_CHAR, FAIL, GET_NEXT, and SUCCEED.

static int csUnicodeTransform::UTF32Rewind	(	const utf32_char *	str,
		size_t	maxRew
	)			`[inline, static]`

Determine how many code units in an UTF-32 buffer need to skipped back to get to the start of the previous encoded code point.

Determine how many code units in an UTF-8 buffer need to skipped back to get to the start of the previous encoded code point.

Parameters:

	str	Pointer to the encoded code point after the code point that is actually to be skipped back.
	maxRew	The number of code units to go back at max. Typically, this is the number of chars from str to the start of the buffer.

Returns:: Number of chars to skip back in the buffer. Returns 0 if maxRew is 0.

Definition at line 971 of file csuctransform.h.

static int csUnicodeTransform::UTF32Skip	(	const utf32_char *	str,
		size_t	maxSkip
	)			`[inline, static]`

Determine how many code units in an UTF-32 buffer need to be skipped to get to the next encoded char.

Determine how many code units in an UTF-8 buffer need to be skipped to get to the next encoded char.

Parameters:

	str	Pointer to buffer with encoded code point.
	maxSkip	The number of code units to skip at max. Usually, this is the number of chars from str to the end of the buffer.

Returns:: Number of chars to skip in the buffer. Returns 0 if maxSkip is 0.

Definition at line 960 of file csuctransform.h.

static size_t csUnicodeTransform::UTF32to16	(	utf16_char *	dest,
		size_t	destSize,
		const utf32_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-32 to UTF-16.

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 560 of file csuctransform.h.

static size_t csUnicodeTransform::UTF32to8	(	utf8_char *	dest,
		size_t	destSize,
		const utf32_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-32 to UTF-8.

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 555 of file csuctransform.h.

static int csUnicodeTransform::UTF8Decode	(	const utf8_char *	str,
		size_t	strlen,
		utf32_char &	ch,
		bool *	isValid = `0`,
		bool	returnNonChar = `false`
	)			`[inline, static]`

Decode an Unicode code point encoded in UTF-8.

Parameters:

	str	Pointer to the encoded code point.
	strlen	Number of code units in the source string.
	ch	Decoded code point.
	isValid	When an error occured during decoding, `ch` contains the replacement character (CS_UC_CHAR_REPLACER). In this case, the bool pointed to by `isValid` will be set to false. The parameter can be 0, but in this case the information whether the decoded char is the replacement character because the source data is errorneous is lost.
	returnNonChar	Whether decoded non-character or high and low surrogates are returned as such. Normally, those code points are replaced with CS_UC_CHAR_REPLACER to signal an invalid encoded code point.

Returns:: The number of code units in str that have to be skipped to retrieve the next encoded code point.

Definition at line 123 of file csuctransform.h.

References CS_UC_IS_NONCHARACTER, CS_UC_IS_SURROGATE, CS_UC_LAST_CHAR, FAIL, GET_NEXT, and SUCCEED.

Referenced by csG2DDrawText< Tpixel, Tpixmixer1, Tpixmixer2, Tpixmixer3 >::DrawText().

static int csUnicodeTransform::UTF8Rewind	(	const utf8_char *	str,
		size_t	maxRew
	)			`[inline, static]`

Determine how many code units in an UTF-8 buffer need to skipped back to get to the start of the previous encoded code point.

Parameters:

	str	Pointer to the encoded code point after the code point that is actually to be skipped back.
	maxRew	The number of code units to go back at max. Typically, this is the number of chars from str to the start of the buffer.

Returns:: Number of chars to skip back in the buffer. Returns 0 if maxRew is 0.

Definition at line 899 of file csuctransform.h.

static int csUnicodeTransform::UTF8Skip	(	const utf8_char *	str,
		size_t	maxSkip
	)			`[inline, static]`

Determine how many code units in an UTF-8 buffer need to be skipped to get to the next encoded char.

Parameters:

	str	Pointer to buffer with encoded code point.
	maxSkip	The number of code units to skip at max. Usually, this is the number of chars from str to the end of the buffer.

Returns:: Number of chars to skip in the buffer. Returns 0 if maxSkip is 0.

Definition at line 858 of file csuctransform.h.

static size_t csUnicodeTransform::UTF8to16	(	utf16_char *	dest,
		size_t	destSize,
		const utf8_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 533 of file csuctransform.h.

static size_t csUnicodeTransform::UTF8to32	(	utf32_char *	dest,
		size_t	destSize,
		const utf8_char *	source,
		size_t	srcSize = `(size_t)-1`
	)			`[inline, static]`

Convert UTF-8 to UTF-32.

Convert UTF-8 to UTF-16.

Parameters:

	dest	Destination buffer.
	destSize	Number of code units the destination buffer can hold.
	source	Source buffer.
	srcSize	Number of code units contained in the source buffer. If this is -1, the length will be determined automatically.

Returns:: Number of code units in the complete converted string, including null terminator.

Remarks:: If the complete converted string wouldn't fit the destination buffer, it is truncated. However, it'll also be null-terminated. Hence, if it has a size of 1, you get an empty string. The returned value is the number of code units needed for the *whole* converted string.

Definition at line 538 of file csuctransform.h.

The documentation for this class was generated from the following file:

csutil/csuctransform.h

Generated for Crystal Space by doxygen 1.4.7


Static Public Member Functions
UTF Decoders
static int	Decode (const utf32_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-32.
static int	Decode (const utf16_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-16.
static int	Decode (const utf8_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-8.
static int	UTF16Decode (const utf16_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-16.
static int	UTF32Decode (const utf32_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-32.
static int	UTF8Decode (const utf8_char str, size_t strlen, utf32_char &ch, bool isValid=0, bool returnNonChar=false)
	Decode an Unicode code point encoded in UTF-8.
UTF Encoders
static int	Encode (const utf32_char ch, utf32_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-32.
static int	Encode (const utf32_char ch, utf16_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-16.
static int	Encode (const utf32_char ch, utf8_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-8.
static int	EncodeUTF16 (const utf32_char ch, utf16_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-16.
static int	EncodeUTF32 (const utf32_char ch, utf32_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-32.
static int	EncodeUTF8 (const utf32_char ch, utf8_char *buf, size_t bufsize, bool allowNonchars=false)
	Encode an Unicode code point to UTF-8.
Code point mappings
static size_t	MapToFold (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)
	Map a code point to its fold equivalent(s).
static size_t	MapToLower (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)
	Map a code point to its lower case equivalent(s).
static size_t	MapToUpper (const utf32_char ch, utf32_char *dest, size_t destSize, uint flags=0)
	Map a code point to its upper case equivalent(s).
Helpers to skip encoded code units in different UTF encodings
static int	UTF16Rewind (const utf16_char *str, size_t maxRew)
	Determine how many code units in an UTF-16 buffer need to skipped back to get to the start of the previous encoded code point.
static int	UTF16Skip (const utf16_char *str, size_t maxSkip)
	Determine how many code units in an UTF-16 buffer need to be skipped to get to the next encoded char.
static int	UTF32Rewind (const utf32_char *str, size_t maxRew)
	Determine how many code units in an UTF-32 buffer need to skipped back to get to the start of the previous encoded code point.
static int	UTF32Skip (const utf32_char *str, size_t maxSkip)
	Determine how many code units in an UTF-32 buffer need to be skipped to get to the next encoded char.
static int	UTF8Rewind (const utf8_char *str, size_t maxRew)
	Determine how many code units in an UTF-8 buffer need to skipped back to get to the start of the previous encoded code point.
static int	UTF8Skip (const utf8_char *str, size_t maxSkip)
	Determine how many code units in an UTF-8 buffer need to be skipped to get to the next encoded char.
Converters between strings in different UTF encodings
static size_t	UTF16to32 (utf32_char dest, size_t destSize, const utf16_char source, size_t srcSize=(size_t)-1)
	Convert UTF-16 to UTF-32.
static size_t	UTF16to8 (utf8_char dest, size_t destSize, const utf16_char source, size_t srcSize=(size_t)-1)
	Convert UTF-16 to UTF-8.
static size_t	UTF32to16 (utf16_char dest, size_t destSize, const utf32_char source, size_t srcSize=(size_t)-1)
	Convert UTF-32 to UTF-16.
static size_t	UTF32to8 (utf8_char dest, size_t destSize, const utf32_char source, size_t srcSize=(size_t)-1)
	Convert UTF-32 to UTF-8.
static size_t	UTF8to16 (utf16_char dest, size_t destSize, const utf8_char source, size_t srcSize=(size_t)-1)
	Convert UTF-8 to UTF-16.
static size_t	UTF8to32 (utf32_char dest, size_t destSize, const utf8_char source, size_t srcSize=(size_t)-1)
	Convert UTF-8 to UTF-32.

Public API Reference

csUnicodeTransform Class Reference [Utilities]

Static Public Member Functions

Detailed Description

Member Function Documentation

csUnicodeTransform Class Reference
[Utilities]