towfc_s.c File Reference

#include "safe_str_lib.h"

Include dependency graph for towfc_s.c:

Functions
int	iswfc (const uint32_t wc)
int	_towfc_single (wchar_t *restrict dest, const uint32_t src)
int	towfc_s (wchar_t *restrict dest, rsize_t dmax, const uint32_t src)

Variables
struct {
unsigned short   upper
unsigned short   lower1
unsigned short   lower2
}	tbl2 []
	iswfc() checks the uppercase character for a mapping to foldcase, returning the number of new wide character codepoints needed.
struct {
unsigned short   upper
unsigned short   lower1
unsigned short   lower2
unsigned short   lower3
}	tbl3 []

Function Documentation

iswfc()

int iswfc

(

const uint32_t

wc

)

_towfc_single()

int _towfc_single	(	wchar_t *restrict	dest,
		const uint32_t	src
	)

towfc_s()

int towfc_s	(	wchar_t *restrict	dest,
		rsize_t	dmax,
		const uint32_t	src
	)

Variable Documentation

upper

unsigned short upper

lower1

unsigned short lower1

lower2

unsigned short lower2

[struct]

const struct { ... } tbl2[]

iswfc() checks the uppercase character for a mapping to foldcase, returning the number of new wide character codepoints needed.

The usual iswupper(wc) case returns 1, and the special 104 full folding cases as specified in Unicode 10.0 CaseFolding.txt return either 2 or 3. This implements Unicode 14.0

Parameters

[in]

wc

unicode character codepoint

Return values

0	when there is no corresponding lowercase mapping.
1	when there is a corresponding common or simple foldcase mapping.
2	a full case-folding expands to 2 characters
3	a full case-folding expands to 3 characters

See also

towfc_s(), wcsfc_s(), towupper()

lower3

unsigned short lower3

[struct]

const struct { ... } tbl3[]

Initial value:

= {
    
    {0x0390, 0x03B9, 0x0308, 0x0301}, 
    {0x03B0, 0x03C5, 0x0308, 0x0301}, 
    {0x1F52, 0x03C5, 0x0313, 0x0300}, 
    {0x1F54, 0x03C5, 0x0313, 0x0301}, 
    {0x1F56, 0x03C5, 0x0313, 0x0342}, 
    {0x1FB7, 0x03B1, 0x0342, 0x03B9}, 
    {0x1FC7, 0x03B7, 0x0342, 0x03B9}, 
    {0x1FD2, 0x03B9, 0x0308, 0x0300}, 
    {0x1FD3, 0x03B9, 0x0308, 0x0301}, 
    {0x1FD7, 0x03B9, 0x0308, 0x0342}, 
    {0x1FE2, 0x03C5, 0x0308, 0x0300}, 
    {0x1FE3, 0x03C5, 0x0308, 0x0301}, 
    {0x1FE7, 0x03C5, 0x0308, 0x0342}, 
    {0x1FF7, 0x03C9, 0x0342, 0x03B9}, 
    {0xFB03, 0x0066, 0x0066, 0x0069}, 
    {0xFB04, 0x0066, 0x0066, 0x006C}, 
    {0, 0, 0, 0}
    
}