From f94a09f4854cf885ed7018a8cc8c6e61a086608a Mon Sep 17 00:00:00 2001
From: "K. Lange" <klange@toaruos.org>
Date: Fri, 4 May 2018 12:17:32 +0900
Subject: [PATCH] add ctype.h

---
 base/usr/include/ctype.h | 13 +++++++++++++
 libc/ctype/isalnum.c     |  5 +++++
 libc/ctype/isalpha.c     |  3 +++
 libc/ctype/isascii.c     |  3 +++
 libc/ctype/iscntrl.c     |  3 +++
 libc/ctype/isdigit.c     |  3 +++
 libc/ctype/isgraph.c     |  3 +++
 libc/ctype/islower.c     |  3 +++
 libc/ctype/isprint.c     |  5 +++++
 libc/ctype/ispunct.c     |  5 +++++
 libc/ctype/isspace.c     |  3 +++
 libc/ctype/isupper.c     |  3 +++
 libc/ctype/isxdigit.c    |  3 +++
 13 files changed, 55 insertions(+)
 create mode 100644 libc/ctype/isalnum.c
 create mode 100644 libc/ctype/isalpha.c
 create mode 100644 libc/ctype/isascii.c
 create mode 100644 libc/ctype/iscntrl.c
 create mode 100644 libc/ctype/isdigit.c
 create mode 100644 libc/ctype/isgraph.c
 create mode 100644 libc/ctype/islower.c
 create mode 100644 libc/ctype/isprint.c
 create mode 100644 libc/ctype/ispunct.c
 create mode 100644 libc/ctype/isspace.c
 create mode 100644 libc/ctype/isupper.c
 create mode 100644 libc/ctype/isxdigit.c

diff --git a/base/usr/include/ctype.h b/base/usr/include/ctype.h
index 3f59c932..e650fd3d 100644
--- a/base/usr/include/ctype.h
+++ b/base/usr/include/ctype.h
@@ -1,2 +1,15 @@
 #pragma once
 
+extern int isalnum(int c);
+extern int isalpha(int c);
+extern int isdigit(int c);
+extern int islower(int c);
+extern int isgraph(int c);
+extern int iscntrl(int c);
+extern int isgraph(int c);
+extern int ispunct(int c);
+extern int isspace(int c);
+extern int isupper(int c);
+extern int isxdigit(int c);
+
+extern int isascii(int c);
diff --git a/libc/ctype/isalnum.c b/libc/ctype/isalnum.c
new file mode 100644
index 00000000..4ccb614a
--- /dev/null
+++ b/libc/ctype/isalnum.c
@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int isalnum(int c) {
+    return isalpha(c) || isdigit(c);
+}
diff --git a/libc/ctype/isalpha.c b/libc/ctype/isalpha.c
new file mode 100644
index 00000000..941f192a
--- /dev/null
+++ b/libc/ctype/isalpha.c
@@ -0,0 +1,3 @@
+int isalpha(int c) {
+    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
+}
diff --git a/libc/ctype/isascii.c b/libc/ctype/isascii.c
new file mode 100644
index 00000000..78c8eba0
--- /dev/null
+++ b/libc/ctype/isascii.c
@@ -0,0 +1,3 @@
+int isascii(int c) {
+	return (c <= 0x7f);
+}
diff --git a/libc/ctype/iscntrl.c b/libc/ctype/iscntrl.c
new file mode 100644
index 00000000..0b80b4ca
--- /dev/null
+++ b/libc/ctype/iscntrl.c
@@ -0,0 +1,3 @@
+int iscntrl(int c) {
+    return ((c >= 0 && c <= 0x1f) || (c == 0x7f));
+}
diff --git a/libc/ctype/isdigit.c b/libc/ctype/isdigit.c
new file mode 100644
index 00000000..c0b0cee6
--- /dev/null
+++ b/libc/ctype/isdigit.c
@@ -0,0 +1,3 @@
+int isdigit(int c) {
+	return (c >= '0' && c <= '9');
+}
diff --git a/libc/ctype/isgraph.c b/libc/ctype/isgraph.c
new file mode 100644
index 00000000..c97a4bae
--- /dev/null
+++ b/libc/ctype/isgraph.c
@@ -0,0 +1,3 @@
+int isgraph(int c) {
+    return (c >= '!' && c <= '~');
+}
diff --git a/libc/ctype/islower.c b/libc/ctype/islower.c
new file mode 100644
index 00000000..a108a3cb
--- /dev/null
+++ b/libc/ctype/islower.c
@@ -0,0 +1,3 @@
+int islower(int c) {
+    return (c >= 'a' && c <= 'z');
+}
diff --git a/libc/ctype/isprint.c b/libc/ctype/isprint.c
new file mode 100644
index 00000000..70c62867
--- /dev/null
+++ b/libc/ctype/isprint.c
@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int isprint(int c) {
+    return isgraph(c) || (c == ' ');
+}
diff --git a/libc/ctype/ispunct.c b/libc/ctype/ispunct.c
new file mode 100644
index 00000000..636355b6
--- /dev/null
+++ b/libc/ctype/ispunct.c
@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int ispunct(int c) {
+    return isgraph(c) && !isalnum(c);
+}
diff --git a/libc/ctype/isspace.c b/libc/ctype/isspace.c
new file mode 100644
index 00000000..a0599635
--- /dev/null
+++ b/libc/ctype/isspace.c
@@ -0,0 +1,3 @@
+int isspace(int c) {
+    return (c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v' || c == ' ');
+}
diff --git a/libc/ctype/isupper.c b/libc/ctype/isupper.c
new file mode 100644
index 00000000..aefee52c
--- /dev/null
+++ b/libc/ctype/isupper.c
@@ -0,0 +1,3 @@
+int isupper(int c) {
+    return (c >= 'A' && c <= 'Z');
+}
diff --git a/libc/ctype/isxdigit.c b/libc/ctype/isxdigit.c
new file mode 100644
index 00000000..fcb431c4
--- /dev/null
+++ b/libc/ctype/isxdigit.c
@@ -0,0 +1,3 @@
+int isxdigit(int c) {
+    return ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'));
+}