API Summary

Classification functions
iswalnum Is character alphanumeric?
iswalpha Is character alphabetic?
iswblank Is character blank?
iswcntrl Is character a control?
iswctype Determine character type
iswdigit Is character a decimal digit?
iswgraph Is character a control?
iswlower Is character a lowercase letter?
iswprint Is character printable?
iswpunct Is character punctuation?
iswspace Is character a whitespace character?
iswupper Is character an uppercase letter?
iswxdigit Is character a hexadecimal digit?
wctype Construct character class
Conversion functions
towctrans Translate character
towlower Convert uppercase character to lowercase
towupper Convert lowercase character to uppercase
wctrans Construct character mapping
Classification functions (extended)
iswalnum_l Is character alphanumeric?
iswalpha_l Is character alphabetic?
iswblank_l Is character blank?
iswcntrl_l Is character a control?
iswctype_l Determine character type
iswdigit_l Is character a decimal digit?
iswgraph_l Is character a control?
iswlower_l Is character a lowercase letter?
iswprint_l Is character printable?
iswpunct_l Is character punctuation?
iswspace_l Is character a whitespace character?
iswupper_l Is character an uppercase letter?
iswxdigit_l Is character a hexadecimal digit?
Conversion functions (extended)
towctrans_l Translate character
towlower_l Convert uppercase character to lowercase
towupper_l Convert lowercase character to uppercase
wctrans_l Construct character mapping