Add a reasonably useless test of file reading and writing.

src/main.mk

@@ -228,5 +228,6 @@ SUBMAKEFILES := stores/dumpBlob.mk \
                 fastq-utilities/fastqSimulate-sort.mk
 
 ifeq ($(BUILDTESTS), 1)
-SUBMAKEFILES += utility/bitsTest.mk
+SUBMAKEFILES += utility/bitsTest.mk \
+                utility/filesTest.mk
 endif

src/utility/filesTest.C

@@ -0,0 +1,85 @@
+
+/******************************************************************************
+ *
+ *  This file is part of canu, a software program that assembles whole-genome
+ *  sequencing reads into contigs.
+ *
+ *  This software is based on:
+ *    'Celera Assembler' (http://wgs-assembler.sourceforge.net)
+ *    the 'kmer package' (http://kmer.sourceforge.net)
+ *  both originally distributed by Applera Corporation under the GNU General
+ *  Public License, version 2.
+ *
+ *  Canu branched from Celera Assembler at its revision 4587.
+ *  Canu branched from the kmer project at its revision 1994.
+ *
+ *  Modifications by:
+ *
+ *  File 'README.licenses' in the root directory of this distribution contains
+ *  full conditions and disclaimers for each license.
+ */
+
+//  g++6 -o filesTest -I.. -I. filesTest.C files.C
+
+#include "files.H"
+
+typedef  uint8   TYPE;
+
+
+int32
+main(int32 argc, char **argv) {
+  uint64   nObj  = (uint64)16 * 1024 * 1024;
+  TYPE    *array = new TYPE [nObj];
+  TYPE     value = 0;
+
+
+  if (1) {
+    fprintf(stderr, "Initializing.\n");
+
+    for (uint64 ii=0; ii<nObj; ii++)
+      array[ii] = ii;
+
+    fprintf(stderr, "Writing.\n");
+
+    FILE *OUT = AS_UTL_openOutputFile("./filesTest.dat");
+
+    writeToFile(array, "array", nObj, OUT);
+
+    AS_UTL_closeFile(OUT);
+  }
+
+
+  if (1) {
+    fprintf(stderr, "Reading - as one block.\n");
+
+    FILE *IN = AS_UTL_openInputFile("./filesTest.dat");
+    loadFromFile(array, "array", nObj, IN);
+    AS_UTL_closeFile(IN);
+
+    for (uint64 ii=0; ii<nObj; ii++)
+      assert(array[ii] == (TYPE)ii);
+  }
+
+
+  if (1) {
+    fprintf(stderr, "Reading.\n");
+
+    FILE *IN = AS_UTL_openInputFile("./filesTest.dat");
+
+    for (uint64 ii=0; ii<nObj; ii++) {
+      loadFromFile(value, "value", IN);
+
+      assert(value == (TYPE)ii);
+    }
+
+    fprintf(stderr, "Reading - one after eof.\n");
+    loadFromFile(value, "value", IN, false);
+    loadFromFile(value, "value", IN, true);
+
+    AS_UTL_closeFile(IN);
+  }
+
+
+  exit(0);
+}
+

src/utility/filesTest.mk

@@ -0,0 +1,20 @@
+
+#  If 'make' isn't run from the root directory, we need to set these to
+#  point to the upper level build directory.
+ifeq "$(strip ${BUILD_DIR})" ""
+  BUILD_DIR    := ../$(OSTYPE)-$(MACHINETYPE)/obj
+endif
+ifeq "$(strip ${TARGET_DIR})" ""
+  TARGET_DIR   := ../$(OSTYPE)-$(MACHINETYPE)
+endif
+
+TARGET   := filesTest
+SOURCES  := filesTest.C
+
+SRC_INCDIRS := .. ../utility
+
+TGT_LDFLAGS := -L${TARGET_DIR}/lib
+TGT_LDLIBS  := -lcanu
+TGT_PREREQS := libcanu.a
+
+SUBMAKEFILES :=