Added x_string utility functions

Added implementation for string length
Added implementation for string copy
Added implementation for string concatination

x_string/x_string.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int x_strlen(char* str){
+	char* ptr = str;
+	while(*ptr != '\0'){
+		ptr++;
+	}
+	return ptr - str;
+}
+
+void x_strcpy(char* dest, char* src, const int size_dest){
+	char* dest_ptr = dest;
+	char* src_ptr = src;
+	int i = 0;
+
+	while(*src_ptr != '\0'){
+		if (i >= size_dest){
+			fprintf(stderr, "Error: x_strcpy\nSource string exeeds destination memory\n");
+			exit(1);
+		}
+		*dest_ptr = *src_ptr;
+		dest_ptr++;
+		src_ptr++;
+		i++;
+	}
+
+}
+
+char* x_strconcat(char* str1, char* str2){
+
+	char* new_string;
+
+	int len1 = x_strlen(str1);
+	int len2 = x_strlen(str2);
+	int new_length = len1 + len2;
+
+	new_string = malloc( sizeof(*new_string) * new_length );
+	x_strcpy(new_string, str1, new_length);
+	x_strcpy(&new_string[len1], str2, new_length - len1);
+
+	return new_string;
+}
+
+int main(){
+
+	char x[] = "hlo";
+	char y[] = "world";
+
+	//printf("%d\n", x_strlen(x));
+	//printf("%d\n", x_strlen(x));
+
+	char* z = x_strconcat(x,y);
+
+	puts(z);
+
+	//free(z);
+
+	return 0;
+}

x_string/x_string.h

@@ -0,0 +1,8 @@
+#ifndef X_STRING_H
+#define X_STRING_H
+
+int x_strlen(char*);
+void x_strcpy(char*, char*, const int);
+char* x_strconcat(char*, char*);
+
+#endif