From 406b5334a38d7ae2d91f593bb767903f9d7321c4 Mon Sep 17 00:00:00 2001
From: Quincey Koziol <koziol@hdfgroup.org>
Date: Tue, 26 Sep 2000 00:03:24 -0500
Subject: [svn-r2594] Purpose:     Small Code Cleanup Description:     Code to
 optimize adjacent (i.e. contiguous) hyperslab was ugly and used too     many
 temporary variables. Solution:     Computed the optimized hyperslabs slightly
 differently and got rid of     unnecessary temporary variables. Platforms
 tested:     FreeBSD 4.1

---
 src/H5Shyper.c | 42 ++++++++++++++++++------------------------
 1 file changed, 18 insertions(+), 24 deletions(-)

diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index 90bc320..2904b51 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -1034,7 +1034,7 @@ printf("%s: Check 1.0\n",FUNC);
      * algorithm to compute the offsets and run through as many as possible,
      * until the buffer fills up.
      */
-    if(num_read<nelmts) { /* Just in case the "remainder" aboce filled the buffer */
+    if(num_read<nelmts) { /* Just in case the "remainder" above filled the buffer */
 #ifdef QAK
 printf("%s: Check 2.0\n",FUNC);
 #endif /* QAK */
@@ -1534,7 +1534,7 @@ printf("%s: Check 1.0\n",FUNC);
      * algorithm to compute the offsets and run through as many as possible,
      * until the buffer fills up.
      */
-    if(num_write<nelmts) { /* Just in case the "remainder" aboce filled the buffer */
+    if(num_write<nelmts) { /* Just in case the "remainder" above filled the buffer */
 #ifdef QAK
 printf("%s: Check 2.0\n",FUNC);
 #endif /* QAK */
@@ -2012,7 +2012,7 @@ printf("%s: Check 1.0\n",FUNC);
      * algorithm to compute the offsets and run through as many as possible,
      * until the buffer fills up.
      */
-    if(num_read<nelmts) { /* Just in case the "remainder" aboce filled the buffer */
+    if(num_read<nelmts) { /* Just in case the "remainder" above filled the buffer */
 #ifdef QAK
 printf("%s: Check 2.0\n",FUNC);
 #endif /* QAK */
@@ -2486,7 +2486,7 @@ printf("%s: Check 1.0\n",FUNC);
      * algorithm to compute the offsets and run through as many as possible,
      * until the buffer fills up.
      */
-    if(num_write<nelmts) { /* Just in case the "remainder" aboce filled the buffer */
+    if(num_write<nelmts) { /* Just in case the "remainder" above filled the buffer */
 #ifdef QAK
 printf("%s: Check 2.0\n",FUNC);
 #endif /* QAK */
@@ -4534,9 +4534,6 @@ H5S_select_hyperslab (H5S_t *space, H5S_seloper_t op,
 		      const hsize_t count[/*space_id*/],
 		      const hsize_t block[/*space_id*/])
 {
-    hssize_t real_stride[H5O_LAYOUT_NDIMS]; /* Location of the block to add for strided selections */
-    hssize_t real_count[H5O_LAYOUT_NDIMS]; /* Location of the block to add for strided selections */
-    hssize_t real_block[H5O_LAYOUT_NDIMS]; /* Location of the block to add for strided selections */
     hsize_t *_stride=NULL;        /* Stride array */
     hsize_t *_block=NULL;        /* Block size array */
     int i;                      /* Counters */
@@ -4612,32 +4609,29 @@ for(i=0; i<space->extent.u.simple.rank; i++)
         } /* end for */
         space->select.sel_info.hslab.app_diminfo = diminfo;
 
+        /* Allocate room for the optimized per-dimension selection info */
+        if((diminfo = H5FL_ARR_ALLOC(H5S_hyper_dim_t,space->extent.u.simple.rank,0))==NULL) {
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate per-dimension vector");
+        } /* end if */
+
         /* Optimize the hyperslab selection to detect contiguously selected block/stride information */
         /* Modify the stride, block & count for contiguous hyperslab selections */
         for(i=0; i<space->extent.u.simple.rank; i++) {
+            /* Starting location doesn't get optimized */
+            diminfo[i].start = start[i];
+
             /* contiguous hyperslabs have the block size equal to the stride */
             if(stride[i]==block[i]) {
-                real_count[i]=1;
-                real_stride[i]=1;
-                real_block[i]=count[i]*block[i];
+                diminfo[i].stride=1;
+                diminfo[i].count=1;
+                diminfo[i].block=count[i]*block[i];
             } /* end if */
             else {
-                real_stride[i]=stride[i];
-                real_count[i]=count[i];
-                real_block[i]=block[i];
+                diminfo[i].stride=stride[i];
+                diminfo[i].count=count[i];
+                diminfo[i].block=block[i];
             } /* end else */
         } /* end for */
-
-        /* Copy all the per-dimension selection info into the space descriptor */
-        if((diminfo = H5FL_ARR_ALLOC(H5S_hyper_dim_t,space->extent.u.simple.rank,0))==NULL) {
-            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't allocate per-dimension vector");
-        } /* end if */
-        for(i=0; i<space->extent.u.simple.rank; i++) {
-            diminfo[i].start = start[i];
-            diminfo[i].stride = real_stride[i];
-            diminfo[i].count = real_count[i];
-            diminfo[i].block = real_block[i];
-        } /* end for */
         space->select.sel_info.hslab.diminfo = diminfo;
 
         /* Set the number of elements in the hyperslab selection */
-- 
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