From fd16c1cf58b0b1015e2d539a4e7a6d73b79c788f Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Mon, 16 Jan 2023 19:13:11 +0200
Subject: [PATCH] LibC: Add is*() functions to libc

---
 libc/Makefile        |  1 +
 libc/ctype.cpp       | 66 ++++++++++++++++++++++++++++++++++++++++++++
 libc/include/ctype.h | 21 ++++++++++++++
 3 files changed, 88 insertions(+)
 create mode 100644 libc/ctype.cpp
 create mode 100644 libc/include/ctype.h

diff --git a/libc/Makefile b/libc/Makefile
index 437742b74..97da9536c 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -31,6 +31,7 @@ BUILDDIR=$(abspath build)
  
 FREEOBJS=\
 $(ARCH_FREEOBJS) \
+ctype.o \
 stdio/printf.o \
 stdio/putchar.o \
 stdio/puts.o \
diff --git a/libc/ctype.cpp b/libc/ctype.cpp
new file mode 100644
index 000000000..db0964392
--- /dev/null
+++ b/libc/ctype.cpp
@@ -0,0 +1,66 @@
+#include <ctype.h>
+
+int isalnum(int c)
+{
+	return isdigit(c) || isalpha(c);
+}
+
+int isalpha(int c)
+{
+	return islower(c) || isupper(c);
+}
+
+int isascii(int c)
+{
+	return c <= 0x7F;
+}
+
+int isblank(int c)
+{
+	return c == ' ' || c == '\t';
+}
+
+int iscntrl(int c)
+{
+	return c < 32 || c == 0x7F;
+}
+
+int isdigit(int c)
+{
+	return '0' <= c && c <= '9';
+}
+
+int isgraph(int c)
+{
+	return 0x21 <= c && c <= 0x7E;
+}
+
+int islower(int c)
+{
+	return 'a' <= c && c <= 'z';
+}
+
+int isprint(int c)
+{
+	return isgraph(c) || c == ' ';
+}
+
+int ispunct(int c)
+{
+	return isgraph(c) && !isalnum(c);
+}
+
+int isspace(int c)
+{
+	return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v';
+}
+
+int isupper(int c)
+{
+	return 'A' <= c && c <= 'Z';
+}
+
+int isxdigit(int c)
+{
+	return isdigit(c) || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F');
+}
diff --git a/libc/include/ctype.h b/libc/include/ctype.h
new file mode 100644
index 000000000..d2672fae7
--- /dev/null
+++ b/libc/include/ctype.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+int isalnum(int);
+int isalpha(int);
+int isascii(int);
+int isblank(int);
+int iscntrl(int);
+int isdigit(int);
+int isgraph(int);
+int islower(int);
+int isprint(int);
+int ispunct(int);
+int isspace(int);
+int isupper(int);
+int isxdigit(int);
+
+__END_DECLS
\ No newline at end of file