[svn-r14905] Introduced a ratio formula compression ratio = uncompressed size / compressed size

in the printing of the compression with 3 digits of precision per hdf-forum NASA developers suggestion

tested: windows, linux, solaris

6 files changed, 12 insertions, 12 deletions

diff --git a/tools/h5dump/h5dump.c b/tools/h5dump/h5dump.c
index 2389ef4..694c634 100644
--- a/tools/h5dump/h5dump.c
+++ b/tools/h5dump/h5dump.c
@@ -2507,7 +2507,7 @@ dump_dcpl(hid_t dcpl_id,hid_t type_id, hid_t obj_id)
             int ndims = H5Sget_simple_extent_dims( sid, dims, NULL);  
             hsize_t nelmts = 1;
             hsize_t size;
-            double per = 0;
+            double ratio = 0;
             hssize_t a, b;
             int ok = 0;
 
@@ -2539,13 +2539,13 @@ dump_dcpl(hid_t dcpl_id,hid_t type_id, hid_t obj_id)
                 size = nelmts * datum_size;
 
                 a = size; b = storage_size;
-                if (a!=0)
-                    per = (double) (b-a)/a;
-                
-                per = -per;
-                per *=100;
 
-                HDfprintf(stdout, "SIZE %Hu (%.1f%%COMPRESSION)\n ", storage_size, per);
+                /* compression ratio = uncompressed size /  compressed size */
+
+                if (b!=0)
+                    ratio = (double) a / (double) b;
+              
+                HDfprintf(stdout, "SIZE %Hu (%.3f:1 COMPRESSION)\n ", storage_size, ratio);
                 
             }
             else
diff --git a/tools/testfiles/tallfilters.ddl b/tools/testfiles/tallfilters.ddl
index 43c27a9..16405b7 100644
--- a/tools/testfiles/tallfilters.ddl
+++ b/tools/testfiles/tallfilters.ddl
@@ -7,7 +7,7 @@ DATASET "all" {
    DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
    STORAGE_LAYOUT {
       CHUNKED ( 10, 5 )
-      SIZE 458 (42.8%COMPRESSION)
+      SIZE 458 (1.747:1 COMPRESSION)
     }
    FILTERS {
       PREPROCESSING SHUFFLE
diff --git a/tools/testfiles/tdeflate.ddl b/tools/testfiles/tdeflate.ddl
index cc5b49b..7f658e7 100644
--- a/tools/testfiles/tdeflate.ddl
+++ b/tools/testfiles/tdeflate.ddl
@@ -7,7 +7,7 @@ DATASET "deflate" {
    DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
    STORAGE_LAYOUT {
       CHUNKED ( 10, 5 )
-      SIZE 385 (51.9%COMPRESSION)
+      SIZE 385 (2.078:1 COMPRESSION)
     }
    FILTERS {
       COMPRESSION DEFLATE { LEVEL 9 }
diff --git a/tools/testfiles/tnbit.ddl b/tools/testfiles/tnbit.ddl
index 2f932b5..c310592 100644
--- a/tools/testfiles/tnbit.ddl
+++ b/tools/testfiles/tnbit.ddl
@@ -7,7 +7,7 @@ DATASET "nbit" {
    DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
    STORAGE_LAYOUT {
       CHUNKED ( 10, 5 )
-      SIZE 76 (90.5%COMPRESSION)
+      SIZE 76 (10.526:1 COMPRESSION)
     }
    FILTERS {
       COMPRESSION NBIT
diff --git a/tools/testfiles/tscaleoffset.ddl b/tools/testfiles/tscaleoffset.ddl
index c9a46f4..3428bfa 100644
--- a/tools/testfiles/tscaleoffset.ddl
+++ b/tools/testfiles/tscaleoffset.ddl
@@ -7,7 +7,7 @@ DATASET "scaleoffset" {
    DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
    STORAGE_LAYOUT {
       CHUNKED ( 10, 5 )
-      SIZE 152 (81.0%COMPRESSION)
+      SIZE 152 (5.263:1 COMPRESSION)
     }
    FILTERS {
       COMPRESSION SCALEOFFSET { MIN BITS 4 }
diff --git a/tools/testfiles/tszip.ddl b/tools/testfiles/tszip.ddl
index 6411bc3..b9f80ca 100644
--- a/tools/testfiles/tszip.ddl
+++ b/tools/testfiles/tszip.ddl
@@ -7,7 +7,7 @@ DATASET "szip" {
    DATASPACE  SIMPLE { ( 20, 10 ) / ( 20, 10 ) }
    STORAGE_LAYOUT {
       CHUNKED ( 10, 5 )
-      SIZE 372 (53.5%COMPRESSION)
+      SIZE 372 (2.151:1 COMPRESSION)
     }
    FILTERS {
       COMPRESSION SZIP {