Test code for checking suitability of zlib for reading and writing compressed data.

r1490 | ffr | 2007-02-15 10:05:00 +1100 (Thu, 15 Feb 2007) | 2 lines

site_ansto/TESTS/check_zlib/rdata.c

@@ -0,0 +1,39 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <zlib.h>
+
+#define DATALENGTH 1024*1024*16
+
+/* Will read upto 16M integers from a file.
+ * This expects the file to contain a sequence of
+ * ints starting at 0, (eg 0 1 2 3 ..) and flags an
+ * error if any of the ints don't match the expected sequence.
+ * This has been tested on compressed and uncompressed files
+ * containing 1 to 16M ints.
+ */
+main(int argc, char *argv[]) {
+  int i,n, error=0;
+  int rdata[DATALENGTH];
+  gzFile *fp;
+
+  if (argc<2) {
+    printf("You must supply a file name\n");
+    exit(1);
+  }
+
+  if ((fp=gzopen(argv[1], "rb")) == NULL) {
+    printf ("Couldn't open file for reading\n");
+    exit(1);
+  }
+  n=gzread(fp, rdata, DATALENGTH*sizeof(int));
+  printf("Read %d bytes, ie %d ints\n", n, n/sizeof(int));
+  for (i=0; i<n/sizeof(int); i++) {
+    if (i != rdata[i]) {
+      error=1;
+      printf("ERROR expected %d, but got %d\n", i, rdata[i]);
+    }
+  }
+  gzclose(fp);
+  if (error==0) 
+    printf("There were no errors.\n");
+}