7 files changed, 64 insertions, 18 deletions
diff --git a/tools/h5diff/h5diffgentest.c b/tools/h5diff/h5diffgentest.c
index 206dca0..4fd6d54 100644
--- a/tools/h5diff/h5diffgentest.c
+++ b/tools/h5diff/h5diffgentest.c
@@ -18,6 +18,7 @@
 #include "hdf5.h"
 #include "H5private.h"
 #include "h5tools.h"
+#include "h5tools_utils.h"
 
 
 /* Name of tool */
diff --git a/tools/h5repack/h5repack_filters.c b/tools/h5repack/h5repack_filters.c
index 213ff65..7072d2d 100644
--- a/tools/h5repack/h5repack_filters.c
+++ b/tools/h5repack/h5repack_filters.c
@@ -15,6 +15,7 @@
 
 #include "h5repack.h"
 #include "h5tools.h"
+#include "h5tools_utils.h"
 
 /* number of members in an array */
 #ifndef NELMTS
diff --git a/tools/h5repack/h5repack_main.c b/tools/h5repack/h5repack_main.c
index 99d700d..010d9f2 100644
--- a/tools/h5repack/h5repack_main.c
+++ b/tools/h5repack/h5repack_main.c
@@ -106,6 +106,10 @@ int main(int argc, const char **argv)
     h5tools_setprogname(PROGRAMNAME);
     h5tools_setstatus(EXIT_SUCCESS);
 
+    /* update hyperslab buffer size from H5TOOLS_BUFSIZE env if exist */
+    if ( h5tools_getenv_update_hyperslab_bufsize() < 0)
+        exit(EXIT_FAILURE);
+
     /* initialize options  */
     h5repack_init(&options, 0, 0, (hsize_t)0);
 
diff --git a/tools/h5repack/h5repacktst.c b/tools/h5repack/h5repacktst.c
index 7be7b32..d0974b6 100644
--- a/tools/h5repack/h5repacktst.c
+++ b/tools/h5repack/h5repacktst.c
@@ -17,6 +17,7 @@
 #include "h5test.h"
 #include "h5diff.h"
 #include "h5tools.h"
+#include "h5tools_utils.h"
 
 #define GOERROR  {H5_FAILED(); goto error;}
 
diff --git a/tools/lib/h5tools.h b/tools/lib/h5tools.h
index 1b2014a..3470b20 100644
--- a/tools/lib/h5tools.h
+++ b/tools/lib/h5tools.h
@@ -31,23 +31,6 @@
 #define START_OF_DATA       0x0001
 #define END_OF_DATA     0x0002
 
-/*
- * The output functions need a temporary buffer to hold a piece of the
- * dataset while it's being printed. This constant sets the limit on the
- * size of that temporary buffer in bytes. For efficiency's sake, choose the
- * largest value suitable for your machine (for testing use a small value).
- */
-#if 1
-#define H5TOOLS_BUFSIZE         (1024 * 1024)
-#else
-#define H5TOOLS_BUFSIZE         (1024)
-#endif
-
-/*
- * Maximum size used in a call to malloc
- */
-#define H5TOOLS_MALLOCSIZE      (128 * 1024 * 1024)
-
 /* format for hsize_t */
 #define HSIZE_T_FORMAT   "%"H5_PRINTF_LL_WIDTH"u"
 
diff --git a/tools/lib/h5tools_utils.c b/tools/lib/h5tools_utils.c
index ab8536f..3f89572 100644
--- a/tools/lib/h5tools_utils.c
+++ b/tools/lib/h5tools_utils.c
@@ -42,6 +42,18 @@ const char *opt_arg;        /*flag argument (or value)               */
 static int  h5tools_d_status = 0;
 static const char  *h5tools_progname = "h5tools";
 
+/*
+ * The output functions need a temporary buffer to hold a piece of the
+ * dataset while it's being printed. This constant sets the limit on the
+ * size of that temporary buffer in bytes. For efficiency's sake, choose the
+ * largest value suitable for your machine (for testing use a small value).
+ */
+/* Maximum size used in a call to malloc for a dataset */
+hsize_t H5TOOLS_MALLOCSIZE = (128 * 1024 * 1024);
+/* size of hyperslab buffer when a dataset is bigger than H5TOOLS_MALLOCSIZE */
+hsize_t H5TOOLS_BUFSIZE = (1024 * 1024);
+
+
 /* ``parallel_print'' variables */
 unsigned char  g_Parallel = 0;  /*0 for serial, 1 for parallel */
 char     outBuff[OUTBUFF_SIZE];
@@ -889,3 +901,43 @@ int h5tools_getstatus(void)
 {
    return h5tools_d_status;
 }
+
+/*-----------------------------------------------------------
+ * PURPOSE : 
+ * if environment variable H5TOOLS_BUFSIZE is set, 
+ * update H5TOOLS_BUFSIZE and H5TOOLS_MALLOCSIZE from the env
+ * This can be called from each tools main() as part of initial act.
+ * Note: this is more of debugging purpose for now.
+ */
+int h5tools_getenv_update_hyperslab_bufsize(void)
+{
+    const char *env_str = NULL;
+    long hyperslab_bufsize_mb;
+
+    /* check if environment variable is set for the hyperslab buffer size */
+    if (NULL != (env_str = HDgetenv ("H5TOOLS_BUFSIZE")))
+    {
+        errno = 0;
+        hyperslab_bufsize_mb = HDstrtol(env_str, (char**)NULL, 10);
+        if (errno != 0 || hyperslab_bufsize_mb <= 0)
+        {
+            
+            /* TODO: later when pubilshed  
+            printf("Error: Invalid environment variable \"H5TOOLS_BUFSIZE\" : %s\n", env_str);
+            */
+            
+            goto error;
+        }
+
+
+        /* convert MB to byte */
+        H5TOOLS_BUFSIZE = hyperslab_bufsize_mb * 1024 * 1024;
+
+        H5TOOLS_MALLOCSIZE = MAX(H5TOOLS_BUFSIZE, H5TOOLS_MALLOCSIZE);
+    }
+
+
+    return (1);
+error:
+    return (-1);
+}
diff --git a/tools/lib/h5tools_utils.h b/tools/lib/h5tools_utils.h
index be32d07..0f3acd1 100644
--- a/tools/lib/h5tools_utils.h
+++ b/tools/lib/h5tools_utils.h
@@ -32,6 +32,10 @@ extern "C" {
 #define PRINT_DATA_MAX_SIZE 	512
 #define OUTBUFF_SIZE 		(PRINT_DATA_MAX_SIZE*4)
 
+/* Maximum size used in a call to malloc for a dataset */
+H5TOOLS_DLLVAR hsize_t H5TOOLS_MALLOCSIZE;
+/* size of hyperslab buffer when a dataset is bigger than H5TOOLS_MALLOCSIZE */
+H5TOOLS_DLLVAR hsize_t H5TOOLS_BUFSIZE;
 H5TOOLS_DLLVAR int  g_nTasks;
 H5TOOLS_DLLVAR unsigned char g_Parallel;
 H5TOOLS_DLLVAR char    outBuff[];
@@ -169,7 +173,7 @@ H5TOOLS_DLL const char *h5tools_getprogname(void);
 H5TOOLS_DLL void     h5tools_setprogname(const char*progname);
 H5TOOLS_DLL int      h5tools_getstatus(void);
 H5TOOLS_DLL void     h5tools_setstatus(int d_status);
-
+H5TOOLS_DLL int h5tools_getenv_update_hyperslab_bufsize(void);
 #ifdef __cplusplus
 }
 #endif