Implement the _ttail_search_file_sorted() function

Telling if the logfile array is sorted

src/include/ttail_search_files.h

@@ -59,7 +59,8 @@ int _ttail_search_closest_files_set_fsizes(ttail_t*);
  *
  *If not sorted attempt to sort them
  *@param ttail_t*
- *@return -1 not sorted 0 sorted
+ *@return -1 not sorted 0 sorted -3 error
+ *@todo checks
  */
 int _ttail_search_file_sorted(ttail_t*);
 

src/ttail_search_files.c

@@ -113,17 +113,30 @@ int _ttail_search_closest_files_set_fsizes(ttail_t* t)
 int _ttail_search_file_sorted(ttail_t* t)
 {
 	/* files start & stop log tm, file start id = i*2 file stop = i*2+1 */
-	struct tm *ftm; 
+	struct tm *ftm;
+	size_t i;
 
 	ftm = malloc(sizeof(struct tm)*t->logfile_sz*2);
 	if(!ftm)
 	{
 		perror("Unable to allocate memory");
-		return -1;
+		return -3;
+	}
+	for(i=0; i<t->logfile_sz; i++)
+	{
+		_ttail_file_minmax(t, 0, ftm+(i*2));
+		if(i)
+		{
+			if(ttail_tm_cmp(ftm+((i-1)*2)+1, ftm+i*2) > 0)
+			{
+				/* not sorted */
+				free(ftm);
+				return -1;
+			}
+		}
 	}
-
 	free(ftm);
-	return -1;
+	return 0;
 }
 
 int _ttail_file_minmax(ttail_t* t, size_t id, struct tm tm[2])