From 156f8bc690dfa1ca70d82553c35eeeda4ca7356c Mon Sep 17 00:00:00 2001
From: Raymond Lu <songyulu@hdfgroup.org>
Date: Mon, 23 Apr 2007 13:57:51 -0500
Subject: [svn-r13694] 1. changed the HDlseek to be lseek64 and HDfseek to be
 fseeko if available, to support big files.  2. added a check in test/big.c to
 make sure the system supports big file.

Tested on smirom because already tested the same changes for v1.6 on liberty, smirom,
copper, and sol.
---
 src/H5private.h | 12 ++++++++++--
 test/big.c      | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 66 insertions(+), 6 deletions(-)

diff --git a/src/H5private.h b/src/H5private.h
index c9d92e5..17b6e75 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -593,7 +593,11 @@ H5_DLL int HDfprintf (FILE *stream, const char *fmt, ...);
 #define HDfrexpl(X,N)		frexp(X,N)
 #endif /* H5_HAVE_FREXPL */
 /* fscanf() variable arguments */
-#define HDfseek(F,O,W)		fseek(F,O,W)
+#ifdef H5_HAVE_FSEEKO
+     #define HDfseek(F,O,W)	fseeko(F,O,W)
+#else
+     #define HDfseek(F,O,W)	fseek(F,O,W)
+#endif
 #define HDfsetpos(F,P)		fsetpos(F,P)
 /* definitions related to the file stat utilities.
  * Windows have its own function names.
@@ -677,7 +681,11 @@ H5_DLL int HDfprintf (FILE *stream, const char *fmt, ...);
         #define HDlseek(F,O,W)  _lseeki64(F,O,W)
      #endif
 #else
-#define HDlseek(F,O,W)		lseek(F,O,W)
+     #ifdef H5_HAVE_FSEEK64
+        #define HDlseek(F,O,W)	lseek64(F,O,W)
+     #else
+        #define HDlseek(F,O,W)	lseek(F,O,W)
+     #endif
 #endif
 #define HDmalloc(Z)		malloc(Z)
 #define HDposix_memalign(P,A,Z) posix_memalign(P,A,Z)
diff --git a/test/big.c b/test/big.c
index 026e917..4ae7dff 100644
--- a/test/big.c
+++ b/test/big.c
@@ -31,6 +31,9 @@ const char *FILENAME[] = {
 #define WRT_SIZE	4*1024
 #define FAMILY_SIZE	1024*1024*1024
 
+/* Define big file as 2GB */
+#define BIG_FILE 0x80000000UL
+
 #define MAX_TRIES	100
 
 #if H5_SIZEOF_LONG_LONG >= 8
@@ -136,6 +139,45 @@ is_sparse(void)
 
 
 /*-------------------------------------------------------------------------
+ * Function:	supports_big
+ *
+ * Purpose:	Determines if the file system of the current working
+ *		directory supports big files.
+ *
+ * Return:	Success:	Non-zero if big files are supported; zero
+ *				otherwise.
+ *
+ *		Failure:	zero
+ *
+ * Programmer:	Raymond Lu
+ *              Wednesday, April 18, 2007
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+supports_big(void)
+{
+    int		fd;
+
+    if ((fd=HDopen("y.h5", O_RDWR|O_TRUNC|O_CREAT, 0666))<0) return 0;
+
+    /* Write a few bytes at 2GB */
+    if (HDlseek(fd, BIG_FILE, SEEK_SET)!=BIG_FILE) return 0;
+    if (5!=HDwrite(fd, "hello", (size_t)5)) return 0;
+
+    /* Write a few bytes at 4GB */
+    if (HDlseek(fd, 2*BIG_FILE, SEEK_SET) != 2*BIG_FILE) return 0;
+    if (5!=HDwrite(fd, "hello", (size_t)5)) return 0;
+
+    if (HDclose(fd)<0) return 0;
+
+    return (1);
+}
+
+
+/*-------------------------------------------------------------------------
  * Function:	enough_room
  *
  * Purpose:	Tries to create a bunch of sparse files to see if quotas will
@@ -551,13 +593,24 @@ main (int ac, char **av)
     if (writer(filename, fapl, WRT_N)) goto error;
     if (reader(filename, fapl)) goto error;
 
-    /* Clean up the test file */
-    if (h5_cleanup(FILENAME, fapl)) remove(DNAME);
     puts("Test passed with the Family Driver.");
 
+    /*
+     * We shouldn't run this test if the file system doesn't support big files 
+     * because we would generate multi-gigabyte files.
+     */
+    puts("\nChecking if file system supports big files...");
+    if (!supports_big()) {
+        puts("Tests for sec2 and stdio are skipped because file system does not support big files.");
+        usage();
+        goto quit;
+    }
+
+    /* Clean up the test file */
+    if (h5_cleanup(FILENAME, fapl)) remove(DNAME);
 
     /* Test big file with the SEC2 driver */
-    puts("\nTesting big file with the SEC2 Driver ");
+    puts("Testing big file with the SEC2 Driver ");
 
     fapl = h5_fileaccess();
     if(H5Pset_fapl_sec2(fapl)<0)
@@ -570,7 +623,6 @@ main (int ac, char **av)
 
     puts("Test passed with the SEC2 Driver.");
 
-
 #ifdef H5_HAVE_FSEEKO
     /* Clean up the test file */
     if (h5_cleanup(FILENAME, fapl)) remove(DNAME);
-- 
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