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815 lines
31 KiB
815 lines
31 KiB
/*****************************************************************/
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/** Microsoft Windows for Workgroups **/
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/** Copyright (C) Microsoft Corp., 1991-1992 **/
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/*****************************************************************/
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/*
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npstring.h
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String classes: definition
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This file contains the basic string classes for the Thor UI.
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Its requirements are:
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- provide a modestly object-oriented interface to string
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manipulation, the better to work with the rest of our code;
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- encapsulate NLS and DBCS support as much as possible;
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- ensure that apps get correct form of library support,
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particularly with possible interference from intrinsics;
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The current solution consists of two classes: NLS_STR, and ISTR.
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class NLS_STR: use wherever NLS/DBCS support is needed.
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Most strings (in the UI, anyway) should be
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of this class.
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class ISTR: Indexes an NLS_STR in a DBCS safe manner. All
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positioning within an NLS_STR is done with ISTRs
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The class hierarchy looks like:
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BASE
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NLS_STR
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RESOURCE_STR
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ISTR
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This file also contains the STACK_NLS_STR macro and the
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strcpy( CHAR *, const NLS_STR& ) prototype.
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FILE HISTORY:
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beng 10/21/90 Created from email memo of last week
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johnl 11/13/90 Removed references to EB_STRING
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johnl 11/28/90 Release fully functional version
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johnl 12/07/90 Numerous revisions after code review
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(Removed SZ_STR, ISTR must associate
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w/a string upon decl etc.)
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beng 02/05/91 Replaced PCH with CHAR * for
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const-placement
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beng 04/26/91 Expunged of CB, IB types; relocated
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inline functions to string/strmisc.cxx
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beng 07/23/91 Added more *_STR types
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gregj 03/22/93 Ported to Chicago environment.
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gregj 03/25/93 Added Party(), DonePartying()
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gregj 03/30/93 Allow assigning NLS_STR to ISTR
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gregj 04/02/93 Added NLS_STR::IsDBCSLeadByte()
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gregj 04/02/93 Added ISTR::operator int
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gregj 04/08/93 Added NLS_STR::strncpy()
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gregj 04/08/93 Added NLS_STR::GetPrivateProfileString()
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*/
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#define WIN31 /* for certain string and NETLIB stuff */
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#ifndef _BASE_HXX_
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#include "base.h"
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#endif
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#ifndef _STRING_HXX_
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#define _STRING_HXX_
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extern HINSTANCE hInstance; // for NLS_STR::LoadString
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// String class doesn't allocate or deallocate memory
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// for STR_OWNERALLOC strings
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//
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#define STR_OWNERALLOC 0x8000
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// Same as owner alloc only the string is initialized with the null string.
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//
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#define STR_OWNERALLOC_CLEAR 0x8001
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// Maximum resource string size, owner alloced strings must be at least
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// MAX_RES_STR_LEN, otherwise an error will occur.
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//
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#define MAX_RES_STR_LEN 255
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// The maximum number of insert parameters the InsertParams method can
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// handle
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//
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#define MAX_INSERT_PARAMS 9
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/*************************************************************************
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NAME: ISTR
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SYNOPSIS: String index object, used in conjunction with NLS_STR
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INTERFACE:
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ISTR() - this ISTR gets associated with
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the passed string and can only be used
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on this string (NOTE: on non-debug
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versions this turns into a nop, can still
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be useful for decl. clarity however).
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ISTR() - Initialize to passed ISTR;
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this ISTR will be associated with
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the same string that the passed ISTR
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is associated with.
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operator=() - Copy passed ISTR (see prev.)
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operator=() - Associate ISTR with a new NLS_STR.
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operator-() - Returns CB diff. between *this & Param.
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(must both belong to the same string)
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operator++() - Advance the ISTR to the next logical
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character (use only where absolutely
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necessary). Stops at end of string
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operator+=() - Advance the ISTR to the ith logical
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character (call operator++ i times)
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Stops at end of string.
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operator==() - Returns TRUE if the two ISTRs point to
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the same position in the string (causes
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an assertion failure if the two ISTRs
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don't point to the same string).
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operator>() - Returns true of *this is greater then
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the passed ISTR (i.e., further along
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in the string).
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operator<() - Same as operator>, only less then.
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Reset() - Resets ISTR to beginning of string and
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updates the ISTR version number with the
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string's current version number
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private:
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QueryIB() - Returns the index in bytes
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QueryPNLS() - Returns the pointer to the NLS_STR this ISTR
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references
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SetPNLS() - Sets the pointer to point to the NLS_STR
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this ISTR references
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DEBUG ONLY:
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QueryVersion() - Gets the version number of
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the string this ISTR is associated with
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SetVersion() - Sets the version number of this ISTR.
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USES:
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CAVEATS: Each NLS_STR has a version number associated with it. When
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an operation is performed that modifies the string, the
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version number is updated. It is invalid to use an ISTR
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after its associated NLS_STR has been modified (can use
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Reset to resync it with the NLS_STR, the index gets reset
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to zero).
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You must associate an NLS_STR with an ISTR at the
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declaration of the ISTR.
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NOTES: The version checking and string association checking goes
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away in the non-debug version.
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HISTORY:
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johnl 11/16/90 Created
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johnl 12/07/90 Modified after code review
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gregj 03/30/93 Allow assigning NLS_STR to ISTR
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**************************************************************************/
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class ISTR
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{
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friend class NLS_STR;
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public:
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ISTR( const ISTR& istr );
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ISTR( const NLS_STR& nls );
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ISTR& operator=( const ISTR& istr );
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ISTR& operator=( const NLS_STR& nls );
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INT operator-( const ISTR& istr ) const;
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ISTR& operator++();
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VOID operator+=( INT iChars );
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BOOL operator==( const ISTR& istr ) const;
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BOOL operator>( const ISTR& istr ) const;
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BOOL operator<( const ISTR& istr ) const;
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operator INT() const { return QueryIB(); }
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VOID Reset();
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private:
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INT _ibString; // Index (in bytes) into an NLS_STR
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NLS_STR *_pnls; // Pointer to "owner" NLS
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INT QueryIB() const
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{ return _ibString; }
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VOID SetIB( INT ib )
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{ _ibString = ib; }
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const NLS_STR* QueryPNLS() const
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{ return _pnls; }
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VOID SetPNLS( const NLS_STR * pnls )
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{ _pnls = (NLS_STR*)pnls; }
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#ifdef DEBUG
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// Version number of NLS_STR this ISTR is associated with
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//
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USHORT _usVersion;
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USHORT QueryVersion() const { return _usVersion; }
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VOID SetVersion( USHORT usVers ) { _usVersion = usVers; }
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#endif
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};
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/*************************************************************************
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NAME: NLS_STR (nls)
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SYNOPSIS: Provide a better string abstraction than the standard ASCIIZ
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representation offered by C (and C++). The abstraction is
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better mainly because it handles double-byte characters
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(DBCS) in the string and makes intelligent use of operator
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overloading.
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INTERFACE: NLS_STR() Construct a NLS_STR (initialized to a CHAR *,
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NLS_STR or NULL). Reports errors via BASE.
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~NLS_STR() Destructor
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operator=() Assign one NLS_STR (or CHAR *) value
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to another (old string is deleted, new
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string is allocated and copies source)
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operator+=() Concatenate with assignment (equivalent to
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strcat - see strcat).
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operator==() Compare two NLS_STRs for equality
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operator!=() Compare two NLS_STRs for inequality
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QueryPch() Access operator, returning a "char *"
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aliased to the string. DO NOT MODIFY
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THE STRING USING THIS METHOD (or pass
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it to procedures that might modify it).
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Synonym: operator const CHAR *().
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operator[]() Same as QueryPch, except the string
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is offset by ISTR characters
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IsDBCSLeadByte() Returns whether a byte is a lead byte,
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according to the ANSI- or OEM-ness of the
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string.
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C-runtime-style methods.
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strlen() Return the length of the string in bytes,
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less terminator. Provided only for crt
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compatibility; please use a Query method
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if possible.
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strcat() Append an NLS_STR. Will cause *this to be
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reallocated if the appended string is larger
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then this->QueryCb() and this is not an
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STR_OWNERALLOC string
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strncpy() Copy a non-null-terminated string into an
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NLS_STR. DBCS-safe. For similar functionality
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with an NLS_STR as the source, use the sub-
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string members.
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strcmp() Compare two NLS_STRs
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stricmp() "
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strncmp() Compare a portion of two NLS_STRs
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strnicmp() "
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strcspn() Find first char in *this that is
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a char in arg
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strspn() Find first char in *this that is
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not a char in arg
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strtok() Returns a token from the string
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strstr() Search for a NLS_STR.
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strchr() Search for a CHAR from beginning.
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Returns offset.
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strrchr() Search for a CHAR from end.
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strupr() Convert NLS_STR to upper case.
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atoi() Returns integer numeric value
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atol() Returns long value
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realloc() Resize string preserving its contents
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Other methods.
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QueryAllocSize() Returns total # of bytes allocated (i.e.,
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number new was called with, or size of
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memory block if STR_OWNERALLOC
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IsOwnerAlloc() Returns TRUE if this string is an owner
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allocated string
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QuerySubStr() Return a substring
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InsertStr() Insert a NLS_STR at given index.
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DelSubStr() Delete a substring
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ReplSubStr() Replace a substring (given start and
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NLS_STR)
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InsertParams() Replace %1-%9 params in *this with the
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corresponding NLS_STRs contained in the
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array of pointers
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LoadString() Load the string associated with the passed
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resource into *this (OWNER_ALLOC strings must
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be at least MAX_RES_STR_LEN). Optionally
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calls InsertParams with a passed array of
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nls pointers.
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GetPrivateProfileString() Loads a string from an INI file.
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Reset() After an operation fails (due to memory
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failure), it is invalid to use the string
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until Reset has been called. If the object
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wasn't successfully constructed, Reset will
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fail.
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QueryTextLength() Returns the number of CHARS, less
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terminator.
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QueryTextSize() Returns the number of bytes, including
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terminator. Denotes amount of storage
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needed to dup string into a bytevector.
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QueryNumChar() Returns total number of logical characters
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within the string. Rarely needed.
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Append() Appends a string to the current string,
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like strcat.
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AppendChar() Appends a single character.
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Compare() As strcmp().
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CopyFrom() As operator=(), but returns an APIERR.
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ToOEM() Convert string to OEM character set.
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ToAnsi() Convert string to ANSI character set.
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Party() Obtain read-write access to the buffer.
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DonePartying() Release read-write access.
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PARENT: BASE
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USES: ISTR
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CAVEATS: A NLS_STR object can enter an error state for various
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reasons - typically a memory allocation failure. Using
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an object in such a state is theoretically an error.
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Since string operations frequently occur in groups,
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we define operations on an erroneous string as no-op,
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so that the check for an error may be postponed until
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the end of the complex operation. Most member functions
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which calculate a value will treat an erroneous string
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as having zero length; however, clients should not depend
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on this.
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Attempting to use an ISTR that is registered with another
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string will cause an assertion failure.
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Each NLS_STR has a version/modification flag that is also
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stored in the the ISTR. An attempt to use an ISTR on an
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NLS_STR that has been modified (by calling one of the methods
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listed below) will cause an assertion failure. To use the
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ISTR after a modifying method, you must first call ISTR::Reset
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which will update the version in the ISTR. See the
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method definition for more detail.
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List of modifying methods:
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All NLS::operator= methods
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NLS::DelSubStr
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NLS::ReplSubStr
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NLS::InsertSubStr
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NOTE: The ISTR used as a starting index on the
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Substring methods remains valid after the call.
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Party() and DonePartying() can be used when you need to
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do something that the standard NLS_STR methods don't
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cover. For example, you might want to tweak the first
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couple of characters in a pathname; if you know they're
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definitely not double-byte characters, this is safe to
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do with ordinary character assignments.
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Calling Party() returns a pointer to the string buffer,
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and places the NLS_STR in an error state to prevent the
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standard methods from operating on it (and thereby getting
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confused by the possibly incorrect cached length). You
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can still call QueryAllocSize() to find out the maximum
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size of the buffer. When you've finished, call DonePartying()
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to switch the NLS_STR back to "normal" mode. There are two
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overloaded forms of DonePartying(). If you know what the
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length of the string is, you can pass it in, and NLS_STR
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will just use that. Otherwise, it will use strlenf() to
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find out what the new length is. If you don't plan to
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change the length, call strlen() on the string before you
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Party(), save that length, and pass it to DonePartying().
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The initial strlen() is fast because it's cached.
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If you find yourself constantly Party()ing in order to
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accomplish a particular function, that function should
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be formally added to the NLS_STR definition.
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NOTES: The lack of a strlwr() method comes from a shortcoming
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in the casemap tables. Sorry.
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STR_OWNERALLOC strings are a special type of NLS_STR
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You mark a string as STR_OWNERALLOC on
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construction by passing the flag STR_OWNERALLOC and a pointer
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to your memory space where you want the string to reside
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plus the size of the memory block.
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THE POINTER MUST POINT TO A VALID NULL TERMINATED STRING.
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You are guaranteed this pointer will never be
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resized or deleted. Note that no checking is performed for
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writing beyond the end of the string. Valid uses include
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static strings, severe optimization, owner controlled
|
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memory allocation or stack controlled memory allocation.
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CODEWORK: Owner-alloc strings should be a distinct
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class from these normal strings.
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CODEWORK: Should add a fReadOnly flag.
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CODEWORK: Should clean up this mess, and make the
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owner-alloc constructor protected.
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I wish I could clean up this mess...
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|
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HISTORY:
|
|
johnl 11/28/90 First fully functioning version
|
|
johnl 12/07/90 Incorporated code review changes
|
|
terryk 04/05/91 add QueryNumChar method
|
|
beng 07/22/91 Added more methods; separated fOwnerAlloc
|
|
from cbData
|
|
gregj 05/22/92 Added ToOEM, ToAnsi methods
|
|
gregj 03/22/93 Ported to Chicago environment
|
|
gregj 04/02/93 Added IsDBCSLeadByte()
|
|
gregj 04/08/93 Added strncpy()
|
|
|
|
**************************************************************************/
|
|
|
|
class NLS_STR : public BASE
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{
|
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friend class ISTR; // Allow access to CheckIstr
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public:
|
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// Default constructor, creating an empty string.
|
|
//
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|
NLS_STR();
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|
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// Initialize to "cchInitLen" characters, each "chInit",
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|
// plus trailing NUL.
|
|
//
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|
NLS_STR( INT cchInitLen );
|
|
|
|
// Initialize from a NUL-terminated character vector.
|
|
//
|
|
NLS_STR( const CHAR *pchInit );
|
|
|
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// Initialize an NLS_STR to memory position passed in achInit
|
|
// No memory allocation of any type will be performed on this string
|
|
// cbSize should be the total memory size of the buffer, if cbSize == -1
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|
// then the size of the buffer will assumed to be strlen(achInit)+1
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|
//
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|
NLS_STR( unsigned stralloc, CHAR *pchInit, INT cbSize = -1 );
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// Initialize from an existing x_STRING.
|
|
//
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|
NLS_STR( const NLS_STR& nlsInit );
|
|
|
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~NLS_STR();
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|
|
// Number of bytes the string uses (not including terminator)
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|
// Cf. QueryTextLength and QueryTextSize.
|
|
//
|
|
inline INT strlen() const;
|
|
|
|
// Return a read-only CHAR vector, for the APIs.
|
|
//
|
|
const CHAR *QueryPch() const
|
|
#ifdef DEBUG
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|
;
|
|
#else
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|
{ return _pchData; }
|
|
#endif
|
|
|
|
const CHAR *QueryPch( const ISTR& istr ) const
|
|
#ifdef DEBUG
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|
;
|
|
#else
|
|
{ return _pchData + istr.QueryIB(); }
|
|
#endif
|
|
|
|
WCHAR QueryChar( const ISTR& istr ) const
|
|
#ifdef DEBUG
|
|
;
|
|
#else
|
|
{ return *(_pchData+istr.QueryIB()); }
|
|
#endif
|
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|
|
operator const CHAR *() const
|
|
{ return QueryPch(); }
|
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|
|
const CHAR *operator[]( const ISTR& istr ) const
|
|
{ return QueryPch(istr); }
|
|
|
|
BOOL IsDBCSLeadByte( CHAR ch ) const;
|
|
|
|
// Total allocated storage
|
|
//
|
|
inline INT QueryAllocSize() const;
|
|
|
|
inline BOOL IsOwnerAlloc() const;
|
|
|
|
// Increase the size of a string preserving its contents.
|
|
// Returns TRUE if successful, false otherwise (illegal to
|
|
// call for an owner alloced string). If you ask for a string smaller
|
|
// then the currently allocated one, the request will be ignored and TRUE
|
|
// will be returned.
|
|
//
|
|
BOOL realloc( INT cbNew );
|
|
|
|
// Returns TRUE if error was successfully cleared (string is now in valid
|
|
// state), FALSE otherwise.
|
|
//
|
|
BOOL Reset();
|
|
|
|
NLS_STR& operator=( const NLS_STR& nlsSource );
|
|
NLS_STR& operator=( const CHAR *achSource );
|
|
|
|
NLS_STR& operator+=( WCHAR wch ); // NEW, replaces AppendChar
|
|
NLS_STR& operator+=( const NLS_STR& nls ) { return strcat(nls); }
|
|
NLS_STR& operator+=( LPCSTR psz ) { return strcat(psz); }
|
|
|
|
NLS_STR& strncpy( const CHAR *pchSource, UINT cbSource );
|
|
|
|
NLS_STR& strcat( const NLS_STR& nls );
|
|
NLS_STR& strcat( LPCSTR psz );
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|
|
|
BOOL operator== ( const NLS_STR& nls ) const;
|
|
BOOL operator!= ( const NLS_STR& nls ) const;
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|
|
|
INT strcmp( const NLS_STR& nls ) const;
|
|
INT strcmp( const NLS_STR& nls, const ISTR& istrThis ) const;
|
|
INT strcmp( const NLS_STR& nls, const ISTR& istrThis,
|
|
const ISTR& istrStart2 ) const;
|
|
|
|
INT stricmp( const NLS_STR& nls ) const;
|
|
INT stricmp( const NLS_STR& nls, const ISTR& istrThis ) const;
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|
INT stricmp( const NLS_STR& nls, const ISTR& istrThis,
|
|
const ISTR& istrStart2 ) const;
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|
|
|
INT strncmp( const NLS_STR& nls, const ISTR& istrLen ) const;
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|
INT strncmp( const NLS_STR& nls, const ISTR& istrLen,
|
|
const ISTR& istrThis ) const;
|
|
INT strncmp( const NLS_STR& nls, const ISTR& istrLen,
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|
const ISTR& istrThis, const ISTR& istrStart2 ) const;
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|
|
|
INT strnicmp( const NLS_STR& nls, const ISTR& istrLen ) const;
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|
INT strnicmp( const NLS_STR& nls, const ISTR& istrLen,
|
|
const ISTR& istrThis ) const;
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|
INT strnicmp( const NLS_STR& nls, const ISTR& istrLen,
|
|
const ISTR& istrThis, const ISTR& istrStart2 ) const;
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|
|
|
// The following str* functions return TRUE if successful (istrPos has
|
|
// meaningful data), false otherwise.
|
|
//
|
|
BOOL strcspn( ISTR *istrPos, const NLS_STR& nls ) const;
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|
BOOL strcspn( ISTR *istrPos, const NLS_STR& nls, const ISTR& istrStart ) const;
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|
BOOL strspn( ISTR *istrPos, const NLS_STR& nls ) const;
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|
BOOL strspn( ISTR *istrPos, const NLS_STR& nls, const ISTR& istrStart ) const;
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|
BOOL strstr( ISTR *istrPos, const NLS_STR& nls ) const;
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|
BOOL strstr( ISTR *istrPos, const NLS_STR& nls, const ISTR& istrStart ) const;
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|
|
BOOL stristr( ISTR *istrPos, const NLS_STR& nls ) const;
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|
BOOL stristr( ISTR *istrPos, const NLS_STR& nls, const ISTR& istrStart ) const;
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|
|
BOOL strchr( ISTR *istrPos, const CHAR ch ) const;
|
|
BOOL strchr( ISTR *istrPos, const CHAR ch, const ISTR& istrStart ) const;
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|
|
BOOL strrchr( ISTR *istrPos, const CHAR ch ) const;
|
|
BOOL strrchr( ISTR *istrPos, const CHAR ch, const ISTR& istrStart ) const;
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|
|
BOOL strtok( ISTR *istrPos, const NLS_STR& nlsBreak, BOOL fFirst = FALSE );
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|
|
|
LONG atol() const;
|
|
LONG atol( const ISTR& istrStart ) const;
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|
|
|
INT atoi() const;
|
|
INT atoi( const ISTR& istrStart ) const;
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|
|
|
NLS_STR& strupr();
|
|
|
|
// Return a pointer to a new NLS_STR that contains the contents
|
|
// of *this from istrStart to:
|
|
// End of string if no istrEnd is passed
|
|
// istrStart + istrEnd
|
|
//
|
|
NLS_STR *QuerySubStr( const ISTR& istrStart ) const;
|
|
NLS_STR *QuerySubStr( const ISTR& istrStart, const ISTR& istrEnd ) const;
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|
|
|
// Collapse the string by removing the characters from istrStart to:
|
|
// End of string
|
|
// istrStart + istrEnd
|
|
// The string is not reallocated
|
|
//
|
|
VOID DelSubStr( ISTR& istrStart );
|
|
VOID DelSubStr( ISTR& istrStart, const ISTR& istrEnd );
|
|
|
|
BOOL InsertStr( const NLS_STR& nlsIns, ISTR& istrStart );
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|
|
|
// Replace till End of string of either *this or replacement string
|
|
// (or istrEnd in the 2nd form) starting at istrStart
|
|
//
|
|
VOID ReplSubStr( const NLS_STR& nlsRepl, ISTR& istrStart );
|
|
VOID ReplSubStr( const NLS_STR& nlsRepl, ISTR& istrStart,
|
|
const ISTR& istrEnd );
|
|
|
|
// Replace %1-%9 in *this with corresponding index from apnlsParamStrings
|
|
// Ex. if *this="Error %1" and apnlsParamStrings[0]="Foo" the resultant
|
|
// string would be "Error Foo"
|
|
//
|
|
USHORT InsertParams( const NLS_STR *apnlsParamStrings[] );
|
|
|
|
// Load a message from a resource file into *this (if string is an
|
|
// OWNER_ALLOC string, then must be at least MAX_RES_STR_LEN. Heap
|
|
// NLS_STRs will be reallocated if necessary
|
|
//
|
|
USHORT LoadString( USHORT usMsgID );
|
|
|
|
// Combines functionality of InsertParams & LoadString. *this gets loaded
|
|
// with the string from the resource file corresponding to usMsgID.
|
|
//
|
|
USHORT LoadString( USHORT usMsgID, const NLS_STR *apnlsParamStrings[] );
|
|
|
|
VOID GetPrivateProfileString( const CHAR *pszFile, const CHAR *pszSection,
|
|
const CHAR *pszKey, const CHAR *pszDefault = NULL );
|
|
|
|
VOID ToOEM(); // convert ANSI to OEM
|
|
|
|
VOID ToAnsi(); // convert OEM to ANSI
|
|
|
|
VOID SetOEM(); // declare that string was constructed as OEM
|
|
VOID SetAnsi(); // declare that string was constructed as ANSI
|
|
|
|
inline BOOL IsOEM() const;
|
|
|
|
CHAR *Party(); // get read-write access
|
|
VOID DonePartying( VOID ); // if you don't have the length handy
|
|
VOID DonePartying( INT cchNew ); // if you do
|
|
|
|
#ifdef EXTENDED_STRINGS
|
|
// Initialize from a NUL-terminated character vector
|
|
// and allocate a minimum of: cbTotalLen+1 bytes or strlen(achInit)+1
|
|
//
|
|
NLS_STR( const CHAR *pchInit, INT iTotalLen );
|
|
|
|
// Similar to prev. except the string pointed at by pchInit is copied
|
|
// to pchBuff. The address of pchBuff is used as the string storage.
|
|
// cbSize is required. stralloc can only be STR_OWNERALLOC (it makes
|
|
// no sense to use STR_OWNERALLOC_CLEAR).
|
|
//
|
|
NLS_STR( unsigned stralloc, CHAR *pchBuff, INT cbSize,
|
|
const CHAR *pchInit );
|
|
|
|
// return the number of logical characters within the string
|
|
//
|
|
INT QueryNumChar() const;
|
|
|
|
// Return the number of printing CHARs in the string.
|
|
// This number does not include the termination character.
|
|
//
|
|
// Cf. QueryNumChar, which returns a count of glyphs.
|
|
//
|
|
INT QueryTextLength() const;
|
|
|
|
// Return the number of BYTES occupied by the string's representation.
|
|
// Cf. QueryAllocSize, which returns the total amount alloc'd.
|
|
//
|
|
INT QueryTextSize() const;
|
|
|
|
APIERR Append( const NLS_STR& nls );
|
|
|
|
APIERR AppendChar( WCHAR wch );
|
|
|
|
APIERR CopyFrom( const NLS_STR& nlsSource );
|
|
APIERR CopyFrom( const CHAR *achSource );
|
|
|
|
INT Compare( const NLS_STR *nls ) const { return strcmp(*nls); }
|
|
|
|
#endif
|
|
|
|
private:
|
|
UINT _fsFlags; // owner-alloc, character set flags
|
|
#define SF_OWNERALLOC 0x1
|
|
#define SF_OEM 0x2
|
|
|
|
INT _cchLen; // Number of bytes string uses (strlen)
|
|
INT _cbData; // Total storage allocated
|
|
CHAR *_pchData; // Pointer to Storage
|
|
|
|
#ifdef DEBUG
|
|
USHORT _usVersion; // Version count (inc. after each change)
|
|
#endif
|
|
|
|
// The following substring functions are used internally (can't be
|
|
// exposed since they take an INT cbLen parameter for an index).
|
|
//
|
|
VOID DelSubStr( ISTR&istrStart, INT cbLen );
|
|
|
|
NLS_STR *QuerySubStr( const ISTR& istrStart, INT cbLen ) const;
|
|
|
|
VOID ReplSubStr( const NLS_STR& nlsRepl, ISTR& istrStart, INT cbLen );
|
|
|
|
BOOL Alloc( INT cchLen ); // Allocate memory for a string
|
|
|
|
#ifdef DEBUG // DEBUG is new for these
|
|
// CheckIstr checks whether istr is associated with this, asserts out
|
|
// if it is not. Also checks version numbers in debug version.
|
|
//
|
|
VOID CheckIstr( const ISTR& istr ) const;
|
|
|
|
// UpdateIstr syncs the version number between *this and the passed
|
|
// ISTR. This is for operations that cause an update to the string
|
|
// but the ISTR that was passed in is still valid (see InsertSubSt).
|
|
//
|
|
VOID UpdateIstr( ISTR *pistr ) const;
|
|
|
|
// IncVers adds one to this strings version number because the previous
|
|
// operation caused the contents to change thus possibly rendering
|
|
// ISTRs on this string as invalid.
|
|
//
|
|
VOID IncVers();
|
|
|
|
// InitializeVers sets the version number to 0
|
|
//
|
|
VOID InitializeVers();
|
|
|
|
// QueryVersion returns the current version number of this string
|
|
//
|
|
USHORT QueryVersion() const;
|
|
#else // DEBUG
|
|
VOID CheckIstr( const ISTR& istr ) const { }
|
|
VOID UpdateIstr( ISTR *pistr ) const { }
|
|
VOID IncVers() { }
|
|
VOID InitializeVers() { }
|
|
USHORT QueryVersion() const { return 0; }
|
|
#endif
|
|
};
|
|
|
|
|
|
/***********************************************************************/
|
|
|
|
/***********************************************************************
|
|
*
|
|
* Macro STACK_NLS_STR(name, len )
|
|
*
|
|
* Define an NLS string on the stack with the name of "name" and the
|
|
* length of "len". The strlen will be 0 and the first character will
|
|
* be '\0'. One byte is added for the NULL terminator. Usage:
|
|
* STACK_NLS_STR( UncPath, UNCLEN );
|
|
*
|
|
* Macro ISTACK_NLS_STR(name, len, pchInitString )
|
|
*
|
|
* Same as STACK_NLS_STR except ISTACK_NLS_STR takes an initializer.
|
|
**********************************************************************/
|
|
|
|
#define STACK_NLS_STR( name, len ) \
|
|
CHAR _tmp##name[ len+1 ] ; \
|
|
*_tmp##name = '\0' ; \
|
|
NLS_STR name( STR_OWNERALLOC, _tmp##name, len+1 );
|
|
|
|
#define ISTACK_NLS_STR( name, len, pchInitString ) \
|
|
STACK_NLS_STR( name, len ) ; \
|
|
name = pchInitString;
|
|
|
|
/***********************************************************************/
|
|
|
|
BOOL NLS_STR::IsOwnerAlloc() const
|
|
{
|
|
return _fsFlags & SF_OWNERALLOC;
|
|
}
|
|
|
|
BOOL NLS_STR::IsOEM() const
|
|
{
|
|
return _fsFlags & SF_OEM;
|
|
}
|
|
|
|
INT NLS_STR::strlen() const
|
|
{
|
|
return _cchLen;
|
|
}
|
|
|
|
INT NLS_STR::QueryAllocSize() const
|
|
{
|
|
return _cbData;
|
|
}
|
|
|
|
#endif // _STRING_HXX_
|