strcoll, _stricoll, _mbscoll, _mbsicoll, wcscoll, _wcsicoll

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Header File

string.h, mbstring.h

Category

Memory and String Manipulation Routines

Prototype

int strcoll(const char *s1, const char *s2);
int wcscoll(const wchar_t *s1, const wchar_t *s2);
int _stricoll(const char *s1, const char *s2);
int _wcsicoll(const wchar_t *s1, wconst_t char *s2);
int _mbscoll(const unsigned char *s1, const unsigned char *s2);
int _mbsicoll(const unsigned char *s1, const unsigned char *s2);

Description

Compares two strings.

strcoll compares the string pointed to by s1 to the string pointed to by s2, according to the current locale's LC_COLLATE category.

_stricoll performs like strcoll but is not case sensitive.

Note: _stricoll does not compare string according to the current locale's LC_COLLATE category. _stricoll gives you a stricmp. The required collation is obtained by calling _lstricoll, or just plain stricoll (which maps to _lstricoll).

The real collation (_lstricoll) returns -1, 0 or 1, whereas _stricoll does a codepoint comparison, and returns < 0, 0 or > 0.

Return Value

less than s2	< 0
the same as s2	== 0
greater than s2	> 0

Example

#include <stdio.h>
#include <string.h>
int main(void)
{
   char *two = "International";
   char *one = "Borland";
   int check;
   check = strcoll(one, two);
   if (check == 0)
      printf("The strings are equal\n");
   if (check <  0)
      printf("%s comes before %s\n", one, two);
   if (check >  0)
      printf("%s comes before %s\n", two, one);
   return 0;
}

Portability

	POSIX	Win32	ANSI C	ANSI C++
strcoll	+	+	+	+
_stricoll		+
_mbscoll		+
_mbsicoll		+
wcscoll		+	+	+
_wcsicoll		+