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isfrgn | Function (Macro) |
ctype.h |
short isfrgn (short c); |
Checks whether a character is a foreign letter.
isfrgn returns nonzero if c is a foreign letter (including Greek ones), either uppercase or lowercase (see isGreek, isfrgnupper and isfrgnlower), otherwise it returns zero. It is an inline function which is implemented using GNU C smart macros, which expands to a relatively large code.