#include "safe_str_lib.h"

Include dependency graph for towfc_s.c:

Functions
wint_t	_towcase (wint_t wc, int lower)

int	iswfc (wint_t wc)

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

int	towfc_s (wchar_t *restrict dest, rsize_t dmax, const wint_t src)
	`towfc_s()` converts a wide character to fully fold-cased (lowercased with possible expansions), according to the Unicode 10.0 CaseFolding table. More...

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. More...

struct {
unsigned short upper

unsigned short lower1

unsigned short lower2

unsigned short lower3

}	tbl3 []

Function Documentation

◆ _towcase()

wint_t _towcase	(	wint_t	wc,
		int	lower
	)

◆ iswfc()

int iswfc ( wint_t wc )

◆ _towfc_single()

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

◆ towfc_s()

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

towfc_s() converts a wide character to fully fold-cased (lowercased with possible expansions), according to the Unicode 10.0 CaseFolding table.

Even in most the unsuccessul cases, just not with with ESNULLP and ESZEROL dest is being written to.

As of Unicode 10.0 there are no possible results as surrogate pairs with sizeof(wchar_t)==2, all results are below U+FFFF.

Parameters

[out]	dest	wide string buffer to store result
[in]	dmax	maximum size of dest, should be 4. (3 + NULL)
[in]	src	wide character to convert to lowercase

Precondition: dest shall not be a null pointer.; dmax shall be bigger than 3; dmax shall not be greater than RSIZE_MAX_WSTR.

Return values

>=0	on successful operation, returns the number of converted wide characters: 0-3
-ESNULLP	when dest is NULL pointer
-ESZEROL	when dmax = 0
-ESLEMIN	when dmax < 4
-ESLEMAX	when dmax > RSIZE_MAX_WSTR
-ESNOTFND	when no mapping for src was found, iswfc is wrong.

See also: iswfc(), wcsfc_s(), towlower()

Variable Documentation

◆ upper

unsigned short upper

◆ lower1

unsigned short lower1

◆ lower2

unsigned short lower2

◆ tbl2

const { ... } 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.

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

◆ tbl3

const { ... } 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 }
}

Functions

Variables