NAME
libcucul character set conversions -
Functions
unsigned long int cucul_utf8_to_utf32 (char const *, unsigned int *)
Convert a UTF-8 character to UTF-32. unsigned int cucul_utf32_to_utf8 (char *, unsigned long int)
Convert a UTF-32 character to UTF-8. unsigned char cucul_utf32_to_cp437 (unsigned long int)
Convert a UTF-32 character to CP437. unsigned long int cucul_cp437_to_utf32 (unsigned char)
Convert a CP437 character to UTF-32. int cucul_utf32_is_fullwidth (unsigned long int)
Tell whether a UTF-32 character is fullwidth.
Detailed Description
These functions perform conversions between usual character sets.
Function Documentation
unsigned long int cucul_utf8_to_utf32 (char const * s, unsigned int * read)
Convert a UTF-8 character read from a string and return its value in the UTF-32 character set. If the second argument is not null, the total number of read bytes is written in it.
If a null byte was reached before the expected end of the UTF-8 sequence, this function returns zero and the number of read bytes is set to zero.
This function never fails, but its behaviour with illegal UTF-8 sequences is undefined.
Parameters:
s A string containing the UTF-8 character.
read A pointer to an unsigned integer to store the number of bytes in the character, or NULL.
Returns:
The corresponding UTF-32 character, or zero if the character is incomplete.
unsigned int cucul_utf32_to_utf8 (char * buf, unsigned long int ch)
Convert a UTF-32 character read from a string and write its value in the UTF-8 character set into the given buffer.
This function never fails, but its behaviour with illegal UTF-32 characters is undefined.
Parameters:
buf A pointer to a character buffer where the UTF-8 sequence will be written.
ch The UTF-32 character.
Returns:
The number of bytes written.
unsigned char cucul_utf32_to_cp437 (unsigned long int ch)
Convert a UTF-32 character read from a string and return its value in the CP437 character set, or '?' if the character has no equivalent.
This function never fails.
Parameters:
ch The UTF-32 character.
Returns:
The corresponding CP437 character, or '?' if not representable.
unsigned long int cucul_cp437_to_utf32 (unsigned char ch)
Convert a CP437 character read from a string and return its value in the UTF-32 character set, or zero if the character is a CP437 control character.
This function never fails.
Parameters:
ch The CP437 character.
Returns:
The corresponding UTF-32 character, or zero if not representable.
int cucul_utf32_is_fullwidth (unsigned long int ch)
Check whether the given UTF-32 character should be printed at twice the normal width (fullwidth characters). If the character is unknown or if its status cannot be decided, it is treated as a standard-width character.
This function never fails.
Parameters:
ch The UTF-32 character.
Returns:
1 if the character is fullwidth, 0 otherwise.