New mime sniffer support classes

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@601 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/sniffer/Err.h

@@ -0,0 +1,43 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file sniffer/Err.h
+	Mime Sniffer Error class declarations
+*/
+#ifndef _sk_sniffer_err_h_
+#define _sk_sniffer_err_h_
+
+#include <SupportDefs.h>
+#include <string>
+
+namespace Sniffer {
+
+//! Exception class used by the MIME Sniffer
+class Err {
+public:
+	Err(const char *msg, const ssize_t pos);
+	Err(const std::string &msg, const ssize_t pos);
+	Err(const Err &ref);
+	virtual ~Err();	
+	Err& operator=(const Err &ref);
+	
+	status_t SetTo(const char *msg, const ssize_t pos);
+	status_t SetTo(const std::string &msg, const ssize_t pos);
+	void Unset();
+	
+	const char* Msg() const;
+	ssize_t Pos() const;
+	
+private:
+	friend class Parser;	// So it can update the pos of its out of mem object
+	void SetMsg(const char *msg);
+	void SetPos(ssize_t pos);
+	char *fMsg;
+	ssize_t fPos;
+};
+
+}
+
+#endif	// _sk_sniffer_err_h_

headers/private/storage/sniffer/Pattern.h

@@ -0,0 +1,49 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file sniffer/Pattern.h
+	Mime Sniffer Pattern declarations
+*/
+#ifndef _sk_sniffer_pattern_h_
+#define _sk_sniffer_pattern_h_
+
+#include <SupportDefs.h>
+#include <string>
+#include <sniffer/Range.h>
+
+class BPositionIO;
+
+namespace Sniffer {
+
+class Err;
+
+//! Abstract class definining an interface for sniffing BPositionIO objects
+class Pattern {
+public:
+	Pattern(const char *string, const char *mask = NULL);
+	~Pattern();
+	
+	status_t InitCheck() const;
+	Err* GetErr() const;
+	
+	bool Sniff(Range range, BPositionIO *data) const;
+	
+	status_t SetTo(const char *string, const char *mask = NULL);
+private:
+	bool Sniff(off_t start, off_t size, BPositionIO *data) const;
+	
+	void SetStatus(status_t status, const char *msg = NULL);
+	void SetErrorMessage(const char *msg);
+
+	std::string fString;
+	std::string fMask;
+
+	status_t fCStatus;
+	Err *fErrorMessage;
+};
+
+}
+
+#endif	// _sk_sniffer_pattern_h_

headers/private/storage/sniffer/PatternList.h

@@ -0,0 +1,40 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file sniffer/PatternList.h
+	MIME sniffer pattern list declarations
+*/
+#ifndef _sk_sniffer_pattern_list_h_
+#define _sk_sniffer_pattern_list_h_
+
+#include <sniffer/Expr.h>
+#include <sniffer/Range.h>
+#include <vector>
+
+class BPositionIO;
+
+namespace Sniffer {
+
+class Err;
+class Pattern;
+
+class PatternList : public Expr {
+public:
+	PatternList(Range range);
+	virtual ~PatternList();
+
+	status_t InitCheck() const;
+	Err* GetErr() const;
+	
+	virtual bool Sniff(BPositionIO *data) const;
+	void Add(Pattern *pattern);
+private:
+	std::vector<Pattern*> fList;
+	Range fRange;
+};
+
+}
+
+#endif	// _sk_sniffer_pattern_list_h_

headers/private/storage/sniffer/RPattern.h

@@ -0,0 +1,38 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file sniffer/RPattern.h
+	Mime Sniffer RPattern declarations
+*/
+#ifndef _sk_sniffer_r_pattern_h_
+#define _sk_sniffer_r_pattern_h_
+
+#include <sniffer/Range.h>
+
+class BPositionIO;
+
+namespace Sniffer {
+
+class Err;
+class Pattern;
+
+//! Abstract class definining an interface for sniffing BFile objects
+class RPattern {
+public:
+	RPattern(Range range, Pattern *pattern);
+	~RPattern();	
+	
+	status_t InitCheck() const;
+	Err* GetErr() const;
+	
+	bool Sniff(BPositionIO *data) const;
+private:
+	Range fRange;
+	Pattern *fPattern;
+};
+
+}
+
+#endif	// _sk_sniffer_r_pattern_h_

headers/private/storage/sniffer/RPatternList.h

@@ -0,0 +1,38 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+/*!
+	\file sniffer/RPatternList.h
+	MIME sniffer rpattern list declarations
+*/
+#ifndef _sk_sniffer_r_pattern_list_h_
+#define _sk_sniffer_r_pattern_list_h_
+
+#include <sniffer/Expr.h>
+#include <vector>
+
+class BPositionIO;
+
+namespace Sniffer {
+
+class Err;	
+class RPattern;
+
+class RPatternList : public Expr {
+public:
+	RPatternList();
+	virtual ~RPatternList();
+	
+	status_t InitCheck() const;
+	Err* GetErr() const;
+	
+	virtual bool Sniff(BPositionIO *data) const;
+	void Add(RPattern *rpattern);
+private:
+	std::vector<RPattern*> fList;
+};
+
+}
+
+#endif	// _sk_sniffer_r_pattern_list_h_