Merge pull request #13 from ProjectRevoTPP/libc

add libc building to agbcc.

1 files changed, 43 insertions, 0 deletions

diff --git a/libc/ctype/isupper.c b/libc/ctype/isupper.c
new file mode 100644
index 0000000..8127e25
--- /dev/null
+++ b/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);
+}
+