Initial commit

src/lib/string.c

@@ -0,0 +1,69 @@
+
+
+void *memset(void *p, int c, int size)
+{
+	char ch;
+	char *pp;
+
+	pp = (char *)p;
+	ch = (char)c;
+
+	for (int i = 0; i < size; i++) {
+		*pp++ = ch;
+	}
+	return p;
+}
+
+void *memcpy(void *d, void *s, int size)
+{
+	char *dst = (char *)d;
+	char *src = (char *)s;
+
+	for (int i = 0; i < size; i++) {
+		*dst = *src;
+		dst++;
+		src++;
+	}
+	return d;
+}
+
+
+int strcmp(const char *s1, const char *s2)
+{
+	unsigned int i = 0;
+	int d;
+
+	while(1) {
+		d = (unsigned char)s1[i] - (unsigned char)s2[i];
+		if (d != 0 || s1[i] == '\0')
+			return d;
+		i++;
+	}
+}
+
+/* LICENCE: Taken from linux for now BB.
+ * strncpy - Copy a length-limited, %NUL-terminated string
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ * @count: The maximum number of bytes to copy
+ *
+ * The result is not %NUL-terminated if the source exceeds
+ * @count bytes.
+ *
+ * In the case where the length of @src is less than  that  of
+ * count, the remainder of @dest will be padded with %NUL.
+ *
+ */
+char *strncpy(char *dest, const char *src, int count)
+{
+	char *tmp = dest;
+ 
+	while (count) {
+		if ((*tmp = *src) != 0)
+			src++;
+		tmp++;
+		count--;
+	}
+	return dest;
+}
+