509 lines
7.5 KiB
C++
509 lines
7.5 KiB
C++
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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path.hxx
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Abstract:
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The PATH class provides an interface to the complete
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Win32 name space. Complete means that it will correctly
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handle long, drive or UNC based, blank embedded, mixed case
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names. It should eliminate the need for everyone to code
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statements such as "is the second char a ':'" or "search for
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the first '\' from the end of the name". That is, access to and
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manipulation of path and file names should be performed soley
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through the PATH member functions. This will eliminate
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the recoding of standard name manipulation code and ensure
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complete support of Win32 functionality, such as codepage and
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DBCS support.
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Author:
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Steve Rowe 13-Dec-90
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Environment:
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ULIB, user
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Notes:
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To clarify terminology used here, the following describes a
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canonicalized path (in butchered BNF/reg exp):
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{Canon} ::= {Prefix}"\"{Name}
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{Prefix} ::= {Device}{Dirs}
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{Dirs} ::= {"\"{Component}}*
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{Device} ::= {Drive}|{Machine}
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{Drive} ::= {Letter}":"
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{Machine} ::= "\\"{Char}+
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{Letter} ::= valid drive letter [a-zA-Z]
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{Char} ::= valid filename/directory char [~:\]
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{Component} ::= {Char}+
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{Name} ::= {Base - excluding "."} | { {Base}"."{Ext} }
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{Base} ::= {Char}+
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{Ext} ::= {Char - excluding "."}+
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Legend:
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-------
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{x}* - 0 or more x
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{x}+ - 1 or more x
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"x" - just x (not the quotes)
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{x}|{y} - x or y (not both or none)
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Examples:
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---------
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# Canon
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--- -----
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(1) x:\abc\def.ghi\jkl.mnop
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(2) \\x\abc\def.ghi\jkl.mnop
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(3) c:\config.sys
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(1) (2) (3)
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Prefix x:\abc\def.ghi \\x\abc\def.ghi c:
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Device x: \\x c:
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Dirs \abc \abc\def.ghi
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Name jkl.mnop jkl.mnop config.sys
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Base jkl jkl config
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Ext mnop mnop sys
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Component numbers are 0-based.
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--*/
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#if !defined( _PATH_)
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#define _PATH_
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#include "wstring.hxx"
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#include "array.hxx"
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//
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// Forward references & declarations
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//
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DECLARE_CLASS( PATH );
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//
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// PATHSTATE maintains the number of characters within each component that
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// makes up a PATH
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//
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struct _PATHSTATE {
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//
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// Prefix
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//
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CHNUM PrefixLen;
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CHNUM DeviceLen;
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CHNUM DirsLen;
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CHNUM SeparatorLen;
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//
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// Name
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//
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CHNUM NameLen;
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CHNUM BaseLen;
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CHNUM ExtLen;
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};
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DEFINE_TYPE( struct _PATHSTATE, PATHSTATE );
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class PATH : public OBJECT {
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public:
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ULIB_EXPORT
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DECLARE_CONSTRUCTOR( PATH );
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DECLARE_CAST_MEMBER_FUNCTION( PATH );
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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Initialize (
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IN PCWSTR InitialPath,
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IN BOOLEAN Canonicalize DEFAULT FALSE
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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Initialize (
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IN PCWSTRING InitialPath,
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IN BOOLEAN Canonicalize DEFAULT FALSE
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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Initialize (
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IN PCPATH InitialPath,
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IN BOOLEAN Canonicalize DEFAULT FALSE
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);
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VIRTUAL
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ULIB_EXPORT
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~PATH (
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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AppendBase (
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IN PCWSTRING Base,
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IN BOOLEAN Absolute DEFAULT FALSE
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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EndsWithDelimiter (
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) CONST;
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NONVIRTUAL
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PCWSTRING
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GetPathString (
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) CONST;
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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HasWildCard (
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) CONST;
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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IsDrive (
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) CONST;
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NONVIRTUAL
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BOOLEAN
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IsRoot (
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) CONST;
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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ModifyName (
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IN PCWSTRING Pattern
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);
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NONVIRTUAL
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PWSTRING
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QueryBase (
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);
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NONVIRTUAL
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ULIB_EXPORT
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PARRAY
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QueryComponentArray (
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OUT PARRAY Array DEFAULT NULL
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) CONST;
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NONVIRTUAL
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PWSTRING
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QueryDevice (
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);
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NONVIRTUAL
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PWSTRING
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QueryDirs (
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);
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NONVIRTUAL
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PWSTRING
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QueryDirsAndName (
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);
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NONVIRTUAL
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PWSTRING
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QueryExt (
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);
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NONVIRTUAL
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ULIB_EXPORT
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PPATH
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QueryFullPath (
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) CONST;
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NONVIRTUAL
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ULIB_EXPORT
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PWSTRING
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QueryFullPathString (
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) CONST;
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NONVIRTUAL
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PWSTRING
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QueryName (
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) CONST;
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NONVIRTUAL
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ULIB_EXPORT
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PPATH
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QueryPath (
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) CONST;
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NONVIRTUAL
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PWSTRING
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QueryPrefix (
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);
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NONVIRTUAL
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ULIB_EXPORT
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PWSTRING
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QueryRoot (
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);
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NONVIRTUAL
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ULIB_EXPORT
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PPATH
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QueryWCExpansion(
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IN PPATH BasePath
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);
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NONVIRTUAL
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BOOLEAN
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SetBase (
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IN PCWSTRING NewBase
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);
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ULIB_EXPORT
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BOOLEAN
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SetDevice (
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IN PCWSTRING NewDevice
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);
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NONVIRTUAL
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BOOLEAN
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SetExt (
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IN PCWSTRING NewExt
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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SetName (
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IN PCWSTRING NewName
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);
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NONVIRTUAL
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BOOLEAN
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SetPrefix (
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IN PCWSTRING NewPrefix
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);
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NONVIRTUAL
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ULIB_EXPORT
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BOOLEAN
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TruncateBase (
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);
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NONVIRTUAL
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ULIB_EXPORT
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VOID
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TruncateNameAtColon (
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);
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private:
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NONVIRTUAL
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VOID
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Construct (
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);
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NONVIRTUAL
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BOOLEAN
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ExpandWildCards(
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IN OUT PWSTRING pStr1,
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IN OUT PWSTRING pStr2
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);
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BOOLEAN
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Initialize (
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);
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NONVIRTUAL
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CHNUM
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QueryBaseStart (
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) CONST;
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CHNUM
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QueryDeviceLen(
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IN PWSTRING pString
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) CONST;
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NONVIRTUAL
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CHNUM
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QueryDeviceStart (
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) CONST;
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NONVIRTUAL
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CHNUM
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QueryExtStart (
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) CONST;
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NONVIRTUAL
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CHNUM
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QueryNameStart (
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) CONST;
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NONVIRTUAL
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CHNUM
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QueryPrefixStart (
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) CONST;
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NONVIRTUAL
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VOID
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SetPathState (
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);
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#if DBG==1
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ULONG _Signature;
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BOOLEAN _Initialized;
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#endif
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//
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// path data
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//
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WCHAR _PathBuffer[MAX_PATH];
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FSTRING _PathString;
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PATHSTATE _PathState;
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};
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INLINE
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CHNUM
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PATH::QueryPrefixStart (
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) CONST
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{
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return( 0 );
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}
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INLINE
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CHNUM
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PATH::QueryNameStart (
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) CONST
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{
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//
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// Increment past the '\'
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//
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return( QueryPrefixStart() + _PathState.PrefixLen + _PathState.SeparatorLen );
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}
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INLINE
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CHNUM
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PATH::QueryBaseStart (
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) CONST
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{
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return( QueryNameStart() );
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}
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INLINE
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CHNUM
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PATH::QueryDeviceStart (
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) CONST
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{
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return( 0 );
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}
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INLINE
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CHNUM
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PATH::QueryExtStart (
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) CONST
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{
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return( QueryNameStart() + _PathState.BaseLen + 1 );
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}
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INLINE
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PCWSTRING
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PATH::GetPathString (
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) CONST
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{
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return( &_PathString );
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}
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INLINE
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PWSTRING
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PATH::QueryBase (
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)
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{
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return( _PathState.BaseLen ? _PathString.QueryString( QueryBaseStart(), _PathState.BaseLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryDirs (
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)
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{
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return( _PathState.DirsLen ? _PathString.QueryString( QueryDeviceStart() + _PathState.DeviceLen, _PathState.DirsLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryDirsAndName (
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)
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{
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return( ( _PathState.DirsLen || _PathState.NameLen ) ? _PathString.QueryString( QueryDeviceStart() + _PathState.DeviceLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryDevice (
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)
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{
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return( _PathState.DeviceLen ? _PathString.QueryString( QueryDeviceStart(), _PathState.DeviceLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryExt (
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)
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{
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return( _PathState.ExtLen ? _PathString.QueryString( QueryExtStart(), _PathState.ExtLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryName (
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) CONST
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{
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return( _PathState.NameLen ? _PathString.QueryString( QueryNameStart(), _PathState.NameLen ) : NULL );
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}
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INLINE
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PWSTRING
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PATH::QueryPrefix (
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)
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{
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return( _PathState.PrefixLen ? _PathString.QueryString( QueryPrefixStart(), _PathState.PrefixLen ) : NULL );
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}
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#endif // _PATH_
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