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libstring/string.c

@@ -140,3 +140,17 @@ void* memmove (void* dest, const void* src, unsigned int n) {
   }
   return dest;
 }
+
+char* strncat (char* dest, const char* src, size_t n) {
+  char* ptr = dest;
+  while (*ptr != '\0')
+    ptr++;
+
+  while (n > 0 && *src != '\0') {
+    *ptr++ = *src++;
+    n--;
+  }
+
+  *ptr = '\0';
+  return dest;
+}

libstring/string.h

@@ -31,6 +31,8 @@ int strcmp (const char* s1, const char* s2);
 /* concatinate strings */
 char* strcat (char* dest, const char* src);
 
+char* strncat (char* dest, const char* src, size_t n);
+
 int isalnum (int c);
 
 int isalpha (int c);