# HG changeset patch
# User Jaroslav Hajek <highegg@gmail.com>
# Date 1228551344 -3600
# Node ID ad8ed668e0a44e97983e2e05b80d3439be50ccb5
# Parent  7d0492aa522d5598b4ee51a57a46b6a3adba5bb2
allow initialized local buffers

diff --git a/liboctave/Array.cc b/liboctave/Array.cc
--- a/liboctave/Array.cc
+++ b/liboctave/Array.cc
@@ -1915,10 +1915,7 @@
     }
   else
     {
-      // Don't use OCTAVE_LOCAL_BUFFER here as it doesn't work with bool
-      // on some compilers.
-      Array<T> vi (ns);
-      T *pvi = vi.fortran_vec ();
+      OCTAVE_LOCAL_BUFFER (T, pvi, ns);
 
       for (octave_idx_type j = 0; j < iter; j++) 
 	{
diff --git a/liboctave/ChangeLog b/liboctave/ChangeLog
--- a/liboctave/ChangeLog
+++ b/liboctave/ChangeLog
@@ -1,3 +1,7 @@
+2008-12-06  Jaroslav Hajek  <highegg@gmail.com>
+
+	* oct-locbuf.h (OCTAVE_LOCAL_BUFFER_INIT): New macro.
+
 2008-10-29  Jaroslav Hajek  <highegg@gmail.com>
 
 	* oct-locbuf.h: New header file.
diff --git a/liboctave/idx-vector.cc b/liboctave/idx-vector.cc
--- a/liboctave/idx-vector.cc
+++ b/liboctave/idx-vector.cc
@@ -34,6 +34,7 @@
 #include "Array.h"
 #include "Range.h"
 
+#include "oct-locbuf.h"
 #include "lo-error.h"
 #include "lo-mappers.h"
 
@@ -502,10 +503,7 @@
 idx_vector
 idx_vector::complement (octave_idx_type n) const
 {
-
-  bool *left = new bool[n];
-
-  std::fill (left, left + n, true);
+  OCTAVE_LOCAL_BUFFER_INIT (bool, left, n, true);
 
   octave_idx_type cnt = n;
 
@@ -522,8 +520,6 @@
   octave_idx_type len = cnt, *data = new octave_idx_type[len];
   for (octave_idx_type i = 0, j = 0; i < n; i++)
     if (left[i]) data[j++] = i;
-  
-  delete [] left;
 
   return new idx_vector_rep (data, len, 
                              len ? data[len-1]+1 : 0, 
@@ -539,9 +535,7 @@
     retval = true;
   else if (length (n) == n && extent(n) == n)
     {
-      bool *left = new bool[n];
-
-      std::fill (left, left + n, true);
+      OCTAVE_LOCAL_BUFFER_INIT (bool, left, n, true);
 
       retval = true;
 
@@ -557,7 +551,6 @@
             }
         }
 
-      delete [] left;
     }
 
   return retval;
diff --git a/liboctave/oct-locbuf.h b/liboctave/oct-locbuf.h
--- a/liboctave/oct-locbuf.h
+++ b/liboctave/oct-locbuf.h
@@ -65,7 +65,7 @@
      <= OCTAVE_LOCAL_BUFFER_MAX_STACK_SIZE; \
   T _bufaut_ ## buf [_lbufaut_ ## buf ? _bufsize_ ## buf : 0]; \
   octave_local_buffer<T> _bufheap_ ## buf (!_lbufaut_ ## buf ? _bufsize_ ## buf : 0); \
-  T *buf = _lbufaut_ ## buf ? _bufaut_ ## buf : static_cast<T *> (_bufheap_ ## buf);
+  T *buf = _lbufaut_ ## buf ? _bufaut_ ## buf : static_cast<T *> (_bufheap_ ## buf)
 
 #else
 
@@ -73,9 +73,17 @@
 
 #define OCTAVE_LOCAL_BUFFER(T, buf, size) \
   octave_local_buffer<T> _buffer_ ## buf (size); \
-  T *buf = _buffer_ ## buf;
+  T *buf = _buffer_ ## buf
 
 #endif 
 
+// Yeah overloading macros would be nice.
+// Note: we use weird variables in the for loop to avoid warnings about
+// shadowed parameters.
+#define OCTAVE_LOCAL_BUFFER_INIT(T, buf, size, value) \
+  OCTAVE_LOCAL_BUFFER(T, buf, size); \
+  for (size_t _buf_iter = 0, _buf_size = size; \
+       _buf_iter < _buf_size; _buf_iter++) buf[_buf_iter] = value
+
 #endif