1 files changed, 37 insertions, 0 deletions
diff --git a/xxx/lib/string/string.c b/xxx/lib/string/string.c
new file mode 100644
index 0000000..729c509
--- /dev/null
+++ b/xxx/lib/string/string.c
@@ -0,0 +1,37 @@
+#include <stdbool.h>
+
+//length 0 for null terminated strings;
+bool strcmp(char *str1, char *str2, int length)
+{
+    int i=0;
+    while(true)
+    {
+	if(str1[i]!=str2[i])return false;
+	i++;
+
+	if(i==length) return true;
+	if(str1[i]==0||str2[i]==0)
+	{
+	    if(str1[i]==str2[i])return true;
+	    return false;
+	}
+    }
+
+}
+
+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;
+}
+
+int strlen(const char* string)
+{
+	int result = 0;
+	while ( string[result] )
+		result++;
+	return result;
+}