[svn-r20384] Purpose:

    Fixed Bug 2184 - GMQS: h5diff - incorrect calculation code for 
    --use-system-epsilon option

Description:
    Merged from HDF5 1.8 branch r20369.
    Fixed h5diff for --use-system-epsilon option: the calculation changed
    from ( |a - b| / b ) to ( |a - b| ). This was decided for better 
    performance and was corrected only in HDF5 trunk, so 1.8 got updated.
    Also comments for equal_XXX() function were updated correctly. 
    Also help page and RM got updated correctly.
    Also add test cases for testing the differences w/wo the option.

     
Tested:
 jam (linux32-LE), amani (linux64-LE), heiwa (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE), Windows (32-LE)

1 files changed, 3 insertions, 9 deletions

diff --git a/tools/h5diff/h5diff_common.c b/tools/h5diff/h5diff_common.c
index da420b0..e0af7f6 100644
--- a/tools/h5diff/h5diff_common.c
+++ b/tools/h5diff/h5diff_common.c
@@ -485,17 +485,11 @@ void usage(void)
  printf("                           number.\n");
  printf("   -p R, --relative=R      Print difference if (|(a-b)/b| > R), R is a positive\n");
  printf("                           number.\n");
- printf("   --use-system-epsilon    Print difference if (|a-b| > EPSILON),\n");
- printf("                           where EPSILON (FLT_EPSILON or FLT_EPSILON) is the\n");
- printf("                           system epsilon value. \n");
- printf("                           If the system epsilon is not defined, use the value\n");
- printf("                           below:\n");
+ printf("   --use-system-epsilon    Print difference if (|a-b| > EPSILON), EPSILON is\n");
+ printf("                           a system epsilon value.\n");
+ printf("                           The system epsilon values are defined as below:\n");
  printf("                               FLT_EPSILON = 1.19209E-07 for float\n");
  printf("                               DBL_EPSILON = 2.22045E-16 for double\n");
- printf("                           -d, -p, and --use-system-epsilon options are used for\n");
- printf("                           comparing floating point values.\n");
- printf("                           By default, strict equality is used. Use -p or -d to\n");
- printf("                           set specific tolerance.\n");
  printf("   --exclude-path \"path\"   Exclude the specified path to an object when\n");
  printf("                           comparing files or groups. If a group is excluded,\n");
  printf("                           all member objects will also be excluded.\n");