The C has a number of functions that can be used to classify and transform individual wide characters. These functions are available to use in a current program after including the header file using - #include <wctype.h>. This header is part of the null-terminated wide strings library. All functions of this header file are listed below:
Note: The library <wctype.h> was a part of extension for the ANSI-C standard, published in 1995 also known as C95.
| Functions | Description |
|---|
| iswalnum() |
Check if wide character is alphanumeric. |
| iswalpha() |
Check if wide character is alphabetic. |
| iswblank() (C99) |
Check if wide character is blank. |
| iswcntrl() |
Check if wide character is a control character. |
| iswdigit() |
Check if wide character is decimal digit. |
| iswgraph() |
Check if wide character has graphical representation. |
| iswlower() |
Check if wide character is lowercase letter. |
| iswprint() |
Check if wide character is printable. |
| iswpunct() |
Check if wide character is a punctuation character. |
| iswspace() |
Check if wide character is a whitespace. |
| iswupper() |
Check if wide character is uppercase letter. |
| iswxdigit() |
Check if character is wide hexadecimal digit. |
| Functions | Description |
|---|
| towlower() |
Convert uppercase wide character to lowercase. |
| towupper() |
Convert lowercase wide character to uppercase. |
| Functions | Description |
|---|
| iswctype() |
Check if wide character has property. |
| towctrans() |
Convert using transformation. |
| wctrans() |
Return character transformation. |
| wctype() |
Return character property. |
| Constants | Description |
|---|
| wctrans_t |
Wide character transformation. |
| wctype_t |
Wide character type. |
| wint_t |
Wide character integer type. |
| Macros | Description |
|---|
| WEOF |
Wide End-of-File. |
