From 97d9a1382b32a7055f407265d24f8dc900e04741 Mon Sep 17 00:00:00 2001
From: Franz Zotter <fzotter@users.sourceforge.net>
Date: Wed, 22 Feb 2006 12:48:15 +0000
Subject: These is the beginning of a try to connect the pd to octave.
 Especially when using the iemmatrix features in pd, this feature becomes
 sensible. On the whole it shall enable the user to use the command line
 parser of octave.

The take-over strategy is bad at this starting point. No threading, no practical data transmission.
Perhaps the common work on it can help. (Franz)

svn path=/trunk/externals/iem/pdoctave/; revision=4611
---
 write_shared_mem.cc | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 write_shared_mem.cc

(limited to 'write_shared_mem.cc')

diff --git a/write_shared_mem.cc b/write_shared_mem.cc
new file mode 100644
index 0000000..2149e91
--- /dev/null
+++ b/write_shared_mem.cc
@@ -0,0 +1,105 @@
+#include <octave/oct.h>
+
+#include <unistd.h>
+#include <string.h>
+#include "pdoctave_dataframe.h"
+
+DatTyp classifyOctPDType (octave_value res)
+{
+   DatTyp pdtyp;
+   if (res.is_real_scalar())
+      pdtyp = FLOAT;
+   else if (res.is_real_matrix()) 
+      pdtyp = MATRIX;
+   else if (res.is_string())
+      pdtyp = SYMBOL;
+   else
+      pdtyp = UNKNOWN;
+}
+
+void writeOctMatrixIntoFloat (Matrix mtx, float *f)
+{
+   int n = mtx.rows();
+   int m = mtx.columns();
+   int i;
+   int j;
+
+   *f++ = n;
+   *f++ = m;
+
+   for (j = 0; j < m; j++)
+      for (i=0; i < n; i++)
+	 *f++ = (float) mtx(i,j);
+}
+
+void writeOctScalarIntoFloat (double d, float *f)
+{
+   *f = (float) d;
+}
+void writeOctStringIntoString (char *s, char *c) 
+{
+   strcpy (s,c);
+}
+
+
+DEFUN_DLD (write_shared_mem, args, , "returning an octave value to pd-value")
+{
+   SharedDataFrame *sdf;
+   int size;
+   void *data;
+   DatTyp pdtype;
+   int shmem_id = args(1).int_value();
+   
+   if (shmem_id == -1) {
+      error("failed to get valid id\n");
+      return octave_value();
+   }
+   sdf = getSharedDataFrame (shmem_id);
+   
+   if (!sdf) {
+      error("failed to attach memory!\n");
+      return octave_value();
+   }
+
+   sleepUntilWriteBlocked (sdf,STD_USLEEP_TIME);
+
+   if (args(0).is_string()) {
+      pdtype = SYMBOL;
+   }
+   else if (args(0).is_real_matrix()) {
+      pdtype = MATRIX;
+      size = args(0).columns() * args(0).rows()+2;
+      if (data = newSharedData (sdf, size, sizeof(float),pdtype)) {
+	 writeOctMatrixIntoFloat (args(0).matrix_value(), (float *) data);
+      }
+      else {
+	 error("failed to get new data memory!");
+	 unBlockForWriting (sdf);
+	 freeSharedDataFrame (&sdf);
+	 return octave_value();
+      }
+   }
+   else if (args(0).is_real_scalar()) {
+      pdtype = FLOAT;
+      if (data = newSharedData (sdf, 1, sizeof(float), pdtype)) {
+	 writeOctScalarIntoFloat(args(0).scalar_value(), (float *) data);
+      }
+      else {
+	 error("failed to get new data memory!");
+	 unBlockForWriting (sdf);
+	 freeSharedDataFrame (&sdf);
+	 return octave_value();
+      }
+   }
+   else 
+      std::cout << " no mehtod for argument conversion" << std::endl;
+
+   unBlockForWriting (sdf);
+
+   freeSharedData (sdf, &data);
+   freeSharedDataFrame (&sdf);
+
+   return octave_value();
+}
+
+
-- 
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