strcoll, wcscoll, _mbscoll
Compare strings using locale-specific information.
int strcoll( const char *string1, const char *string2 ); int wcscoll( const wchar_t *string1, const wchar_t *string2 ); int _mbscoll( const unsigned char *string1, const unsigned char *string2 );
- string1, string2
- Null-terminated strings to compare.
Each of these functions returns a value indicating the relationship of string1 to string2, as follows.
|Return value||Relationship of string1 to string2|
|< 0||string1 less than string2|
|0||string1 identical to string2|
|> 0||string1 greater than string2|
Each of these functions returns _NLSCMPERROR on an error. To use _NLSCMPERROR, include either STRING.H or MBSTRING.H. wcscoll can fail if either string1 or string2 contains wide-character codes outside the domain of the collating sequence. When an error occurs, wcscoll may set errno to EINVAL. To check for an error on a call to wcscoll, set errno to 0 and then check errno after calling wcscoll.
Each of these functions performs a case-sensitive comparison of string1 and string2 according to the code page currently in use. These functions should be used only when there is a difference between the character set order and the lexicographic character order in the current code page and this difference is of interest for the string comparison.
Generic-Text Routine Mappings
|TCHAR.H routine||_UNICODE & _MBCS not defined||_MBCS defined||_UNICODE defined|
|strcoll||<string.h>||ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP|
|wcscoll||<wchar.h>, <string.h>||ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP|
|_mbscoll||<mbstring.h>||Win 98, Win Me, Win NT, Win 2000, Win XP|
For additional compatibility information, see Compatibility in the Introduction.
All versions of the C run-time libraries.
Locale Routines, String Manipulation Routines | strcoll Functions Overview | localeconv | _mbsnbcoll | setlocale | strcmp | _stricmp | strncmp | _strnicmp | strxfrm | Run-Time Routines and .NET Framework Equivalents