add ctype.h

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);

libc/ctype/isalnum.c

@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int isalnum(int c) {
+    return isalpha(c) || isdigit(c);
+}

libc/ctype/isalpha.c

@@ -0,0 +1,3 @@
+int isalpha(int c) {
+    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
+}

libc/ctype/isascii.c

@@ -0,0 +1,3 @@
+int isascii(int c) {
+	return (c <= 0x7f);
+}

libc/ctype/iscntrl.c

@@ -0,0 +1,3 @@
+int iscntrl(int c) {
+    return ((c >= 0 && c <= 0x1f) || (c == 0x7f));
+}

libc/ctype/isdigit.c

@@ -0,0 +1,3 @@
+int isdigit(int c) {
+	return (c >= '0' && c <= '9');
+}

libc/ctype/isgraph.c

@@ -0,0 +1,3 @@
+int isgraph(int c) {
+    return (c >= '!' && c <= '~');
+}

libc/ctype/islower.c

@@ -0,0 +1,3 @@
+int islower(int c) {
+    return (c >= 'a' && c <= 'z');
+}

libc/ctype/isprint.c

@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int isprint(int c) {
+    return isgraph(c) || (c == ' ');
+}

libc/ctype/ispunct.c

@@ -0,0 +1,5 @@
+#include <ctype.h>
+
+int ispunct(int c) {
+    return isgraph(c) && !isalnum(c);
+}

libc/ctype/isspace.c

@@ -0,0 +1,3 @@
+int isspace(int c) {
+    return (c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v' || c == ' ');
+}

libc/ctype/isupper.c

@@ -0,0 +1,3 @@
+int isupper(int c) {
+    return (c >= 'A' && c <= 'Z');
+}

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'));
+}