1 files changed, 43 insertions, 0 deletions
diff --git a/lib/string/string.c b/lib/string/string.c
new file mode 100644
index 0000000..be2c7ed
--- /dev/null
+++ b/lib/string/string.c
@@ -0,0 +1,43 @@
+#include <stdbool.h>
+#include "string.h"
+
+void* memcpy(void* restrict dstptr, const void* restrict srcptr, int size)
+{
+	unsigned char* dst = (unsigned char*) dstptr;
+	const unsigned char* src = (const unsigned char*) srcptr;
+	for ( int i = 0; i < size; i++ )
+		dst[i] = src[i];
+	return dstptr;
+}
+
+
+// extra function for non-null terminated 
+//length 0 for null terminated strings;
+int strcmp_l(char *str1, char *str2, int length)
+{
+    int i=0;
+    while(true)
+    {
+
+	if(str1[i]!=str2[i])return str1[i]-str2[i];
+	i++;
+	if(i==length) return 0;
+	
+	if( length==0 && (str1[i]==0 || str2[i]==0 ) )
+	    return str1[i]-str2[i];
+
+    }
+
+}
+static int strcmp(char *str1, char *str2)
+{
+    return strcmp_l(str1,str2,0);
+}
+
+
+int strlen(const char* string)
+{
+	int result = 0;
+	while ( string[result] )result++;
+	return result;
+}