From 90efbb83da4d90d641e244419a4528fc6aa6ebbc Mon Sep 17 00:00:00 2001
From: Mike Wey
Date: Wed, 2 Feb 2011 23:59:22 +0100
Subject: Add the exceptions

---
 dmagick/Exception.d | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 dmagick/Image.d     |   3 +-
 dmagick/Options.d   |   1 -
 3 files changed, 128 insertions(+), 2 deletions(-)
 create mode 100644 dmagick/Exception.d

diff --git a/dmagick/Exception.d b/dmagick/Exception.d
new file mode 100644
index 0000000..6fbd828
--- /dev/null
+++ b/dmagick/Exception.d
@@ -0,0 +1,126 @@
+/**
+ * A class to expose ImageInfo QuantizeInfo and DrawInfo
+ *
+ * Copyright: Mike Wey 2011
+ * License:   To be determined
+ * Authors:   Mike Wey
+ */
+
+module dmagick.Exception;
+
+import std.conv;
+
+import dmagick.c.client;
+import dmagick.c.exception;
+
+/**
+ * A base class for all exceptions thrown bij DMagick.
+ * The following Exceptions are derived from this class: $(BR)$(BR)
+ * ResourceLimitException, TypeException, OptionException,
+ * DelegateException, MissingDelegateException, CorruptImageException,
+ * FileOpenException, BlobException, StreamException, CacheException,
+ * CoderException, FilterException, ModuleException, DrawException,
+ * ImageException, WandException, RandomException, XServerException,
+ * MonitorException, RegistryException, ConfigureException, PolicyException
+ */
+class MagickException : Exception
+{
+	this(string reason, string description)
+	{
+		string message = to!(string)(GetClientName());
+
+		if ( reason.length > 0 )
+			message ~= ": " ~ reason;
+		if ( description.length > 0 )
+			message ~= " (" ~ description ~ ")";
+
+		super(message);
+	}
+}
+
+/**
+ * A base class for all errors thrown bij DMagick.
+ * The following Errors are derived from this class: $(BR)$(BR)
+ * ResourceLimitError, TypeError, OptionError,
+ * DelegateError, MissingDelegateError, CorruptImageError,
+ * FileOpenError, BlobError, StreamError, CacheError,
+ * CoderError, FilterError, ModuleError, DrawError,
+ * ImageError, WandError, RandomError, XServerError,
+ * MonitorError, RegistryError, ConfigureError, PolicyError
+ */
+class MagickError : Error
+{
+	this(string reason, string description)
+	{
+		string message = to!(string)(GetClientName());
+
+		if ( reason.length > 0 )
+			message ~= ": " ~ reason;
+		if ( description.length > 0 )
+			message ~= " (" ~ description ~ ")";
+
+		super(message);
+	}
+}
+
+mixin(generateExceptions());
+
+/**
+ * Generate the exceptions and the throwException function;
+ */
+private string generateExceptions()
+{
+	string[] severities = [ "Blob", "Cache", "Coder", "Configure",
+		"CorruptImage", "Delegate", "Draw", "FileOpen", "Filter",
+		"Image", "MissingDelegate", "Module", "Monitor", "Option",
+		"Policy", "Random", "Registry", "ResourceLimit", "Stream",
+		"Type", "Wand", "XServer" ];
+
+	string exceptions;
+
+	exceptions ~= 
+		"void throwException(ExceptionInfo* exception)
+		 {
+			if ( exception.severity == ExceptionType.UndefinedException )
+				return;
+
+			string reason      = to!(string)(exception.reason);
+			string description = to!(string)(exception.description);	
+
+			switch(exception.severity)
+			{";
+
+	foreach ( severity; severities )
+	{
+		exceptions ~=
+			"case ExceptionType."~ severity ~"Warning:
+				throw new "~ severity ~"Exception(reason, description);
+				break;";
+	}
+
+	exceptions ~= "}}";
+
+	foreach ( severity; severities )
+	{
+		exceptions ~= 
+			"class " ~ severity ~ "Exception : MagickException
+			 {
+				this(string reason, string description)
+				{
+					super(reason, description);
+				}
+			 }";
+
+		exceptions ~= 
+			"class " ~ severity ~ "Error : MagickError
+			 {
+				this(string reason, string description)
+				{
+					super(reason, description);
+				}
+			 }";
+	}
+
+	return exceptions;
+}
+
diff --git a/dmagick/Image.d b/dmagick/Image.d
index e946433..5d3636a 100644
--- a/dmagick/Image.d
+++ b/dmagick/Image.d
@@ -8,6 +8,7 @@
 
 module dmagick.Image;
 
+import dmagick.Exception;
 import dmagick.Options;
 import dmagick.Utils;
 
@@ -49,7 +50,7 @@ class Image
 		ExceptionInfo* exception = AcquireExceptionInfo();
 		MagickCoreImage* image = ReadImage(options.imageInfo, exception);
 
-		//TODO: Throw if exception.
+		throwException(exception);
 
 		imageRef = ImageRef(image);
 		DestroyExceptionInfo(exception);
diff --git a/dmagick/Options.d b/dmagick/Options.d
index 312e912..d7aa486 100644
--- a/dmagick/Options.d
+++ b/dmagick/Options.d
@@ -6,7 +6,6 @@
  * Authors:   Mike Wey
  */
 
-
 module dmagick.Options;
 
 import std.conv;
-- 
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