Changeset 4212 for trunk/psLib/src/mathtypes

Timestamp:

Jun 10, 2005, 11:46:46 AM (21 years ago)

Author:

desonia

Message:

fixed bug in psPixels and tested psVectorExtend.

Location:

trunk/psLib/src/mathtypes

Files:

• psVector.c (modified) (3 diffs)
• psVector.h (modified) (2 diffs)

trunk/psLib/src/mathtypes/psVector.c

@@ -9 +9 @@
 *  @author Robert DeSonia, MHPCC
 *
-*  @version $Revision: 1.41 $ $Name: not supported by cvs2svn $
-*  @date $Date: 2005-04-29 02:25:09 $
+*  @version $Revision: 1.42 $ $Name: not supported by cvs2svn $
+*  @date $Date: 2005-06-10 21:46:46 $
 *
 *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -54 +54 @@
 
     elementSize = PSELEMTYPE_SIZEOF(elemType);
+    if (elementSize < 1) {
+        psError(PS_ERR_BAD_PARAMETER_TYPE, true,
+                PS_ERRORTEXT_psVector_UNSUPPORTED_TYPE, elemType);
+        return NULL;
+    }
+
 
     // Create vector struct
@@ -121 +127 @@
     in->n = n;
     return in;
+}
+
+psVector *psVectorExtend(psVector *vector, int delta, int nExtend)
+{
+    // can't handle a NULL vector (don't know the data type to allocate)
+    if (vector == NULL) {
+        psError(PS_ERR_BAD_PARAMETER_NULL, true,
+                PS_ERRORTEXT_psVector_NULL);
+        return NULL;
+    }
+
+    // requirement on delta; if < 1, set to 10.
+    if (delta < 1) {
+        delta = 10;
+    }
+
+    // adjust the allocated size, if needed. (if nExtend < 1, this is will never happen)
+    if (nExtend > 0) {
+        unsigned int minAlloc = vector->n + nExtend + nExtend;
+        if (vector->nalloc < minAlloc) {
+            unsigned int nAlloc = delta + vector->nalloc;
+            // make sure the delta is large enough hold twice the extended length.
+            if (nAlloc < minAlloc) {
+                nAlloc = minAlloc;
+            }
+            vector = psVectorRealloc(vector, nAlloc);
+        }
+    } else if (nExtend < -vector->n) {
+        // For the case of a negative nExtend, need to check that we are not decreasing
+        // vector beyond its own length (i.e., creating a negative length).
+        nExtend = -vector->n;
+    }
+
+    // increment the length by the value specified
+    vector->n += nExtend;
+
+    return vector;
 }
 

trunk/psLib/src/mathtypes/psVector.h

@@ -11 +11 @@
  *  @author Ross Harman, MHPCC
  *
- *  @version $Revision: 1.34 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2005-06-08 23:40:45 $
+ *  @version $Revision: 1.35 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2005-06-10 21:46:46 $
  *
  *  Copyright 2004-2005 Maui High Performance Computing Center, University of Hawaii
@@ -88 +88 @@
     psVector* psVec,                   ///< Vector to reallocate.
     psU32 nalloc                       ///< Total number of elements to make available.
+);
+
+/** Extend a vector's length.
+ *
+ *  Increments a vector's length, n, by the specified number of elements.
+ *  If the allocated storage is less than the current vector's length plus
+ *  twice the number of elements to be added, it is reallocated larger by
+ *  a given amount.
+ *
+ *  @return psVector*      Pointer to the adjusted psVector
+ */
+psVector *psVectorExtend(
+    psVector *vector,                  ///< Vector to extend
+    int delta,                         ///< Amount to expand allocation, if necessary
+    int nExtend                        ///< Number of elements to add to vector length
 );