Add mem_heap_strcat().

include/mem0mem.h

@@ -311,6 +311,17 @@ mem_heap_strdupl(
 	const char*	str,	/* in: string to be copied */
 	ulint		len);	/* in: length of str, in bytes */
 
+/**************************************************************************
+Concatenate two strings and return the result, using a memory heap. */
+
+char*
+mem_heap_strcat(
+/*============*/
+				/* out, own: the result */
+	mem_heap_t*	heap,	/* in: memory heap where string is allocated */
+	const char*	s1,	/* in: string 1 */
+	const char*	s2);	/* in: string 2 */
+
 #ifdef MEM_PERIODIC_CHECK
 /**********************************************************************
 Goes through the list of all allocated mem blocks, checks their magic

mem/mem0mem.c

@@ -114,6 +114,31 @@ mem_heap_strdup(
 	return(memcpy(mem_heap_alloc(heap, len), str, len));
 }
 
+/**************************************************************************
+Concatenate two strings and return the result, using a memory heap. */
+
+char*
+mem_heap_strcat(
+/*============*/
+				/* out, own: the result */
+	mem_heap_t*	heap,	/* in: memory heap where string is allocated */
+	const char*	s1,	/* in: string 1 */
+	const char*	s2)	/* in: string 2 */
+{
+	char*	s;
+	ulint	s1_len = strlen(s1);
+	ulint	s2_len = strlen(s2);
+
+	s = mem_heap_alloc(heap, s1_len + s2_len + 1);
+
+	memcpy(s, s1, s1_len);
+	memcpy(s + s1_len, s2, s2_len);
+
+	s[s1_len + s2_len] = '\0';
+
+	return(s);
+}
+
 /*******************************************************************
 Creates a memory heap block where data can be allocated. */