Initial checkin. BPrivate::Storage::Mime::SnifferRules class, which is

responsible for managing sniffer rules and sniffing files and data
streams.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1147 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/mime/SnifferRules.h

@@ -0,0 +1,66 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file SnifferRules.h
+	SnifferRules class declarations
+*/
+
+#ifndef _MIME_SNIFFER_RULES_H
+#define _MIME_SNIFFER_RULES_H
+
+#include <SupportDefs.h>
+
+#include <list>
+#include <string>
+
+struct entry_ref;
+class BString;
+
+namespace BPrivate {
+namespace Storage {
+
+namespace Sniffer {
+	class Rule;
+}
+
+namespace Mime {
+
+class SnifferRules {
+public:
+	SnifferRules();
+	~SnifferRules();
+	
+	status_t GuessMimeType(const entry_ref *ref, BString *type);
+	status_t GuessMimeType(const void *buffer, int32 length, BString *type);
+	
+	status_t SetSnifferRule(const char *type, const char *rule);
+	status_t DeleteSnifferRule(const char *type);
+	
+	void PrintToStream() const;
+private:
+	status_t BuildRuleList();
+	status_t GuessMimeType(BPositionIO *data, BString *type);
+	ssize_t MaxBytesNeeded();
+	status_t ProcessType(const char *type, ssize_t *bytesNeeded);
+
+	struct sniffer_rule {
+		std::string type;							// The mime type that own the rule
+		std::string rule_string;					// The unparsed string version of the rule
+		BPrivate::Storage::Sniffer::Rule *rule;		// The parsed rule
+		
+		sniffer_rule(BPrivate::Storage::Sniffer::Rule *rule = NULL);
+		~sniffer_rule(); 
+	};		
+
+	std::list<sniffer_rule> fRuleList;
+	ssize_t fMaxBytesNeeded;
+	bool fHaveDoneFullBuild;
+};
+
+} // namespace Mime
+} // namespace Storage
+} // namespace BPrivate
+
+#endif	// _MIME_SNIFFER_H