URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [branches/] [newlib/] [newlib/] [newlib/] [libc/] [ctype/] [isalpha.c] - Rev 1765
Compare with Previous | Blame | View Log
/* FUNCTION <<isalpha>>---alphabetic character predicate INDEX isalpha ANSI_SYNOPSIS #include <ctype.h> int isalpha(int <[c]>); TRAD_SYNOPSIS #include <ctype.h> int isalpha(<[c]>); DESCRIPTION <<isalpha>> is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero when <[c]> represents an alphabetic ASCII character, and 0 otherwise. It is defined only when <<isascii>>(<[c]>) is true or <[c]> is EOF. You can use a compiled subroutine instead of the macro definition by undefining the macro using `<<#undef isalpha>>'. RETURNS <<isalpha>> returns non-zero if <[c]> is a letter (<<A>>--<<Z>> or <<a>>--<<z>>). PORTABILITY <<isalpha>> is ANSI C. No supporting OS subroutines are required. */ #include <_ansi.h> #include <ctype.h> #undef isalpha int _DEFUN(isalpha,(c),int c) { return((_ctype_ + 1)[c] & (_U|_L)); }