libutils: isoc: implement more ctypes functions

Implement missing functions from ctypes.h.

Signed-off-by: Yunjong Jeong <[email protected]>
Acked-by: Jerome Forissier <[email protected]>

lib/libutils/isoc/isalnum.c

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_isalnum(int c)
+{
+    return isalpha(c) || isdigit(c);
+}

lib/libutils/isoc/iscntrl.c

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_iscntrl(int c)
+{
+	if (c < 0x20 || c == 0x7f)
+		return 1;
+	return 0;
+}

lib/libutils/isoc/isgraph.c

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_isgraph(int c)
+{
+	if (c >= 0x21 && c < 0x7f)
+		return 1;
+	return 0;
+}

lib/libutils/isoc/islower.c

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_islower(int c)
+{
+	return (c >= 'a' && c <= 'z');
+}

lib/libutils/isoc/isprint.c

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_isprint(int c)
+{
+	if (c >= 0x20 && c < 0x7f)
+		return 1;
+	return 0;
+}

lib/libutils/isoc/ispunct.c

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_ispunct(int c)
+{
+    return isgraph(c) && !isalnum(c);
+}

lib/libutils/isoc/sub.mk

@@ -19,6 +19,13 @@ srcs-y += tolower.c
 srcs-y += isalpha.c
 srcs-y += isspace.c
 srcs-y += isupper.c
+srcs-y += isalnum.c
+srcs-y += iscntrl.c
+srcs-y += isgraph.c
+srcs-y += islower.c
+srcs-y += isprint.c
+srcs-y += ispunct.c
+srcs-y += toupper.c
 
 subdirs-y += newlib
 subdirs-$(arch_arm) += arch/$(ARCH)

lib/libutils/isoc/toupper.c

@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2019, KAIST
+ */
+#include <ctype.h>
+
+int __builtin_toupper(int c)
+{
+	if (c >= 'a' && c <= 'z')
+		return c - 'a' + 'A';
+	return c;
+}