Add verification of crc function.

.gitattributes

@@ -324,6 +324,7 @@ tests/Makefile.in -text
 tests/cksum.c -text
 tests/cksum.h -text
 tests/cksum_read.c -text
+tests/cksum_verify.c -text
 tests/cksum_write.c -text
 tests/cksum_write_chunk.c -text
 tests/ensure_array_size.c -text

tests/Makefile.am

 ## Process this file with automake to produce Makefile.in
 #
-TESTS = test_grib.sh test_cksum_grib test_cksum_nc test_cksum_extra \
+TESTS = test_grib.sh cksum_verify \
+	test_cksum_grib test_cksum_nc test_cksum_extra \
 	test_cksum_service test_cksum_nc2 test_cksum_nc4 test_cksum_ieg \
 	test_chunk_cksum \
 	pio_write_run pio_cksum_mpinonb pio_cksum_fpguard \
 	pio_cksum_asynch pio_cksum_writer pio_cksum_cdf \
 	test_resource_copy
-check_PROGRAMS = test_grib cksum_write cksum_read pio_write \
+check_PROGRAMS = cksum_verify test_grib cksum_write cksum_read pio_write \
 	test_resource_copy cksum_write_chunk
 #
 test_grib_SOURCES = test_grib.c
+cksum_verify_SOURCES = cksum_verify.c cksum.c cksum.h
 cksum_write_SOURCES = cksum_write.c cksum.c cksum.h
 cksum_write_chunk_SOURCES = cksum_write_chunk.c cksum.c cksum.h
 cksum_read_SOURCES = cksum_read.c \

tests/Makefile.in

@@ -50,13 +50,14 @@ PRE_UNINSTALL = :
 POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
-TESTS = test_grib.sh test_cksum_grib test_cksum_nc test_cksum_extra \
-	test_cksum_service test_cksum_nc2 test_cksum_nc4 \
-	test_cksum_ieg test_chunk_cksum pio_write_run \
-	pio_cksum_mpinonb pio_cksum_fpguard pio_cksum_asynch \
-	pio_cksum_writer pio_cksum_cdf test_resource_copy$(EXEEXT)
-check_PROGRAMS = test_grib$(EXEEXT) cksum_write$(EXEEXT) \
-	cksum_read$(EXEEXT) pio_write$(EXEEXT) \
+TESTS = test_grib.sh cksum_verify$(EXEEXT) test_cksum_grib \
+	test_cksum_nc test_cksum_extra test_cksum_service \
+	test_cksum_nc2 test_cksum_nc4 test_cksum_ieg test_chunk_cksum \
+	pio_write_run pio_cksum_mpinonb pio_cksum_fpguard \
+	pio_cksum_asynch pio_cksum_writer pio_cksum_cdf \
+	test_resource_copy$(EXEEXT)
+check_PROGRAMS = cksum_verify$(EXEEXT) test_grib$(EXEEXT) \
+	cksum_write$(EXEEXT) cksum_read$(EXEEXT) pio_write$(EXEEXT) \
 	test_resource_copy$(EXEEXT) cksum_write_chunk$(EXEEXT)
 subdir = tests
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in \
@@ -96,6 +97,10 @@ am_cksum_read_OBJECTS = cksum_read.$(OBJEXT) var_cksum.$(OBJEXT) \
 cksum_read_OBJECTS = $(am_cksum_read_OBJECTS)
 cksum_read_LDADD = $(LDADD)
 cksum_read_DEPENDENCIES = ../src/libcdi.la
+am_cksum_verify_OBJECTS = cksum_verify.$(OBJEXT) cksum.$(OBJEXT)
+cksum_verify_OBJECTS = $(am_cksum_verify_OBJECTS)
+cksum_verify_LDADD = $(LDADD)
+cksum_verify_DEPENDENCIES = ../src/libcdi.la
 am_cksum_write_OBJECTS = cksum_write.$(OBJEXT) cksum.$(OBJEXT)
 cksum_write_OBJECTS = $(am_cksum_write_OBJECTS)
 cksum_write_LDADD = $(LDADD)
@@ -130,12 +135,14 @@ CCLD = $(CC)
 LINK = $(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) \
 	--mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) \
 	$(LDFLAGS) -o $@
-SOURCES = $(cksum_read_SOURCES) $(cksum_write_SOURCES) \
-	$(cksum_write_chunk_SOURCES) $(pio_write_SOURCES) \
-	$(test_grib_SOURCES) $(test_resource_copy_SOURCES)
-DIST_SOURCES = $(cksum_read_SOURCES) $(cksum_write_SOURCES) \
-	$(cksum_write_chunk_SOURCES) $(pio_write_SOURCES) \
-	$(test_grib_SOURCES) $(test_resource_copy_SOURCES)
+SOURCES = $(cksum_read_SOURCES) $(cksum_verify_SOURCES) \
+	$(cksum_write_SOURCES) $(cksum_write_chunk_SOURCES) \
+	$(pio_write_SOURCES) $(test_grib_SOURCES) \
+	$(test_resource_copy_SOURCES)
+DIST_SOURCES = $(cksum_read_SOURCES) $(cksum_verify_SOURCES) \
+	$(cksum_write_SOURCES) $(cksum_write_chunk_SOURCES) \
+	$(pio_write_SOURCES) $(test_grib_SOURCES) \
+	$(test_resource_copy_SOURCES)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -333,6 +340,7 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 #
 test_grib_SOURCES = test_grib.c
+cksum_verify_SOURCES = cksum_verify.c cksum.c cksum.h
 cksum_write_SOURCES = cksum_write.c cksum.c cksum.h
 cksum_write_chunk_SOURCES = cksum_write_chunk.c cksum.c cksum.h
 cksum_read_SOURCES = cksum_read.c \
@@ -425,6 +433,9 @@ clean-checkPROGRAMS:
 cksum_read$(EXEEXT): $(cksum_read_OBJECTS) $(cksum_read_DEPENDENCIES) $(EXTRA_cksum_read_DEPENDENCIES) 
 	@rm -f cksum_read$(EXEEXT)
 	$(LINK) $(cksum_read_OBJECTS) $(cksum_read_LDADD) $(LIBS)
+cksum_verify$(EXEEXT): $(cksum_verify_OBJECTS) $(cksum_verify_DEPENDENCIES) $(EXTRA_cksum_verify_DEPENDENCIES) 
+	@rm -f cksum_verify$(EXEEXT)
+	$(LINK) $(cksum_verify_OBJECTS) $(cksum_verify_LDADD) $(LIBS)
 cksum_write$(EXEEXT): $(cksum_write_OBJECTS) $(cksum_write_DEPENDENCIES) $(EXTRA_cksum_write_DEPENDENCIES) 
 	@rm -f cksum_write$(EXEEXT)
 	$(LINK) $(cksum_write_OBJECTS) $(cksum_write_LDADD) $(LIBS)
@@ -449,6 +460,7 @@ distclean-compile:
 
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cksum.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cksum_read.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cksum_verify.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cksum_write.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cksum_write_chunk.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/ensure_array_size.Po@am__quote@

tests/cksum_verify.c

+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cksum.h"
+
+enum {
+  block_size = 16,
+};
+
+int
+main()
+{
+  unsigned char *test_data, *init_block;
+  size_t num_blocks = 1000;
+  if (!(init_block = calloc(block_size * block_size, 1U))
+      || !(test_data = calloc((size_t)block_size * num_blocks, 1U)))
+    return EXIT_FAILURE;
+  /* this is supposed to be non-random */
+  srand48(5L);
+  init_block[7] = 15U;
+  /* repeat block and rotate */
+  for (size_t i = 1; i < block_size; ++i)
+    {
+      memcpy(init_block + block_size * i,
+             init_block + block_size - i, i);
+      memcpy(init_block + block_size * i + i, init_block,
+             block_size - i);
+    }
+  for (size_t i = 0; i < num_blocks; ++i)
+    {
+      size_t block_idx = ((size_t)lrand48()) % block_size;
+      memcpy(test_data + i, init_block + block_idx * block_size,
+             block_size);
+    }
+  uint32_t cksum_result = memcrc(test_data, num_blocks * block_size);
+  if (cksum_result != UINT32_C(0xc47779cd))
+    {
+      printf("unexpected crc result: 0x%8"PRIx32"\n", cksum_result);
+      return EXIT_FAILURE;
+    }
+  return EXIT_SUCCESS;
+}
+
+/*
+ * Local Variables:
+ * c-file-style: "Java"
+ * c-basic-offset: 2
+ * indent-tabs-mode: nil
+ * show-trailing-whitespace: t
+ * require-trailing-newline: t
+ * End:
+ */