From 048b6803e8c6d63e3ae00a84d35071fecc10ba91 Mon Sep 17 00:00:00 2001
From: "Kevin M. Rosenberg" <kevin@rosenberg.net>
Date: Mon, 24 Feb 2003 12:41:23 +0000
Subject: [PATCH] r4114: *** empty log message ***

---
 debian/changelog |  6 ++++++
 wdq2wav.cpp      | 23 +++++++++++++++--------
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index 056c0bc..7c736f5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+wdq2wav (0.5.1-1) unstable; urgency=low
+
+  * Avoid possible divide by 0
+
+ -- Kevin M. Rosenberg <kmr@debian.org>  Mon, 24 Feb 2003 05:36:33 -0700
+
 wdq2wav (0.5.0-1) unstable; urgency=low
 
   * New upstream, add support for scaling while preserving zero point
diff --git a/wdq2wav.cpp b/wdq2wav.cpp
index 16eddba..cd3af8b 100644
--- a/wdq2wav.cpp
+++ b/wdq2wav.cpp
@@ -8,7 +8,7 @@
 **
 **  Copyright (c) 2003 Kevin Rosenberg
 **
-**  $Id: wdq2wav.cpp,v 1.17 2003/02/24 08:40:25 kevin Exp $
+**  $Id: wdq2wav.cpp,v 1.18 2003/02/24 12:41:23 kevin Exp $
 **
 **  This program is free software; you can redistribute it and/or modify
 **  it under the terms of the GNU General Public License (version 2) as
@@ -26,7 +26,7 @@
 
 #include <wdq2wav.h>
 
-const char* g_szIdStr = "$Id: wdq2wav.cpp,v 1.17 2003/02/24 08:40:25 kevin Exp $";
+const char* g_szIdStr = "$Id: wdq2wav.cpp,v 1.18 2003/02/24 12:41:23 kevin Exp $";
 
 bool g_quiet = false;
 bool g_verbose = false;
@@ -126,7 +126,7 @@ main (int argc, char *argv[])
 
   const char* progname = argv[0];
   
-  while ((c = getopt (argc, argv, "rqvdph")) != -1) {
+  while ((c = getopt (argc, argv, "rqvzdph")) != -1) {
     switch (c) {
     case 'r':
         std::cout << "Version " << g_szIdStr << std::endl;
@@ -143,6 +143,9 @@ main (int argc, char *argv[])
     case 'p':
       play = true;
       break;
+    case 'z':
+      g_ignore_zero = true;
+      break;
     case 'h':
       usage (progname);
       return (0);
@@ -523,9 +526,10 @@ WavFile::WavFile (WindaqChannel& wdq_channel, const char* fname)
 			       wdq_channel.m_min_scaled_data);
     } else {
       double max_value = fabs(wdq_channel.m_max_scaled_data);
-      if (fabs(wdq_channel.m_min_scaled_data) > max_value)
-	max_value = fabs(wdq_channel.m_min_scaled_data);
-      data_scale = 32767. / max_value;
+      if (fabs (wdq_channel.m_min_scaled_data) > max_value)
+	max_value = fabs (wdq_channel.m_min_scaled_data);
+      if (max_value != 0.)
+	data_scale = 32767. / max_value;
     }
     
     if (g_debug) {
@@ -553,9 +557,12 @@ WavFile::WavFile (WindaqChannel& wdq_channel, const char* fname)
     for (i = 0; i < m_nSamples; i++) {
       double value = input[i];
       value = (slope * value) + intercept;
-      value = (value + data_offset) * data_scale;
-      if (g_ignore_zero)
+      if (g_ignore_zero) {
+	value = (value + data_offset) * data_scale;
 	value += 0.5 - 32768;
+      } else
+	value = value * data_scale;
+      
       signed short int v = static_cast<signed short int>(value);
 #if WORDS_BIG_ENDIAN
       unsigned char* p = reinterpret_cast<unsigned char*>(&v);
-- 
2.34.1