merge sources into single tree

1 files changed, 27 insertions, 0 deletions

diff --git a/src/ctype/toupper.c b/src/ctype/toupper.c
new file mode 100644
index 00000000..f4611bc7
--- /dev/null
+++ b/src/ctype/toupper.c
@@ -0,0 +1,27 @@
+#include <ctype.h>
+#include "limits.h"
+#include "nonstd/assert.h"
+#include "nonstd/internal.h"
+
+/** convert a lowercase letter to uppercase **/
+int toupper(int c)
+{
+	unsigned char *map = __libc(TOUPPER);
+
+	ASSERT_REPRESENTABLE(c, 0, UCHAR_MAX, unsigned char, EOF);
+	/*
+	RETURN_SUCCESS(ARGUMENT(c) converted to uppercase);
+	RETURN_FAILURE(ARGUMENT(c), ARGUMENT(c) was not a lowercase letter or it has no equivalent upercase letter);
+	*/
+	return map[c];
+}
+
+/***
+converts a lowercase letter to its equivalent uppercase letter in the current
+locale.
+***/
+
+/*
+LC_CTYPE
+STDC(1)
+*/