towupper
| Defined in header <wctype.h>
|
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| wint_t towupper( wint_t wc ); |
(since C95) | |
Converts the given wide character to uppercase, if possible.
Parameters
| wc | - | wide character to be converted |
Return value
Uppercase version of wc or unmodified wc if no uppercase version is listed in the current C locale.
Notes
Only 1:1 character mapping can be performed by this function, e.g. the uppercase form of 'ß' is (with some exceptions) the two-character string "SS", which cannot be obtained by towupper.
ISO 30112 specifies which pairs of Unicode characters are included in this mapping.
Example
Run this code
#include <stdio.h> #include <wchar.h> #include <wctype.h> #include <locale.h> int main(void) { wchar_t wc = L'\u017f'; // Latin small letter Long S ('ſ') printf("in the default locale, towupper(%#x) = %#x\n", wc, towupper(wc)); setlocale(LC_ALL, "en_US.utf8"); printf("in Unicode locale, towupper(%#x) = %#x\n", wc, towupper(wc)); }
Output:
in the default locale, towupper(0x17f) = 0x17f in Unicode locale, towupper(0x17f) = 0x53