diff options
author | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:39:52 +0300 |
commit | 8a0efa53e44919bcf5ccb1d3353618a82afdf8bc (patch) | |
tree | 68c3dbf3f2c6fd5d49777def9914d77b5cd4589d /newlib/libc/ctype/isupper.c | |
parent | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (diff) |
import newlib-2000-02-17 snapshot
Diffstat (limited to 'newlib/libc/ctype/isupper.c')
-rw-r--r-- | newlib/libc/ctype/isupper.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/newlib/libc/ctype/isupper.c b/newlib/libc/ctype/isupper.c new file mode 100644 index 000000000..8127e25da --- /dev/null +++ b/newlib/libc/ctype/isupper.c @@ -0,0 +1,43 @@ + +/* +FUNCTION +<<isupper>>---uppercase character predicate + +INDEX +isupper + +ANSI_SYNOPSIS +#include <ctype.h> +int isupper(int <[c]>); + +TRAD_SYNOPSIS +#include <ctype.h> +int isupper(<[c]>); + +DESCRIPTION +<<isupper>> is a macro which classifies ASCII integer values by table +lookup. It is a predicate returning non-zero for upper-case letters +(<<A>>--<<Z>>), and 0 for other characters. 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 isupper>>'. + +RETURNS +<<isupper>> returns non-zero if <[c]> is a upper case letter (A-Z). + +PORTABILITY +<<isupper>> is ANSI C. + +No supporting OS subroutines are required. +*/ +#include <_ansi.h> +#include <ctype.h> + +#undef isupper +int +_DEFUN(isupper,(c),int c) +{ + return((_ctype_ + 1)[c] & _U); +} + |