1420 lines
35 KiB
C
1420 lines
35 KiB
C
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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strmap.c
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Abstract:
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Strmap (formally pathmap) is a fast hueristic-based program that
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searches strings and attempts to replace substrings when there
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are matching substrings in the mapping database.
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Author:
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Marc R. Whitten (marcw) 20-Mar-1997
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Revision History:
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Jim Schmidt (jimschm) 05-Jun-2000 Added multi table capability
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Jim Schmidt (jimschm) 08-May-2000 Improved replacement routines and
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added consistent filtering and
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extra data option
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Jim Schmidt (jimschm) 18-Aug-1998 Redesigned to fix two bugs, made
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A & W versions
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--*/
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//
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// Includes
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//
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#include "pch.h"
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//
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// Strings
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//
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// None
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//
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// Constants
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//
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#define CHARNODE_SINGLE_BYTE 0x0000
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#define CHARNODE_DOUBLE_BYTE 0x0001
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#define CHARNODE_REQUIRE_WACK_OR_NUL 0x0002
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//
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// Macros
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//
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// None
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//
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// Types
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//
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// None
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//
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// Globals
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//
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// None
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//
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// Macro expansion list
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//
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// None
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//
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// Private function prototypes
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//
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// None
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//
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// Macro expansion definition
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//
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// None
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//
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// Code
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//
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PMAPSTRUCT
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CreateStringMappingEx (
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IN BOOL UsesFilters,
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IN BOOL UsesExtraData
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)
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/*++
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Routine Description:
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CreateStringMapping allocates a string mapping data structure and
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initializes it. Callers can enable filter callbacks, extra data support, or
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both. The mapping structure contains either CHARNODE elements, or
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CHARNODEEX elements, depending on the UsesFilters or UsesExtraData flag.
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Arguments:
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UsesFilters - Specifies TRUE to enable filter callbacks. If enabled,
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those who add string pairs must specify the filter callback
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(each search/replace pair has its own callback)
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UsesExtraData - Specifies TRUE to associate extra data with the string
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mapping pair.
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Return Value:
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A handle to the string mapping structure, or NULL if a structure could not
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be created.
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--*/
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{
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POOLHANDLE Pool;
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PMAPSTRUCT Map;
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Pool = PoolMemInitNamedPool ("String Mapping");
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MYASSERT (Pool);
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Map = (PMAPSTRUCT) PoolMemGetAlignedMemory (Pool, sizeof (MAPSTRUCT));
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MYASSERT (Map);
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ZeroMemory (Map, sizeof (MAPSTRUCT));
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Map->Pool = Pool;
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Map->UsesExNode = UsesFilters|UsesExtraData;
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Map->UsesFilter = UsesFilters;
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Map->UsesExtraData = UsesExtraData;
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return Map;
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}
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VOID
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DestroyStringMapping (
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IN PMAPSTRUCT Map
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)
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{
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if (Map) {
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PoolMemEmptyPool (Map->Pool);
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PoolMemDestroyPool (Map->Pool);
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// Map is no longer valid
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}
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}
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PCHARNODE
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pFindCharNode (
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IN PMAPSTRUCT Map,
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IN PCHARNODE PrevNode, OPTIONAL
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IN WORD Char
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)
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{
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PCHARNODE Node;
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if (!PrevNode) {
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Node = Map->FirstLevelRoot;
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} else {
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Node = PrevNode->NextLevel;
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}
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while (Node) {
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if (Node->Char == Char) {
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return Node;
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}
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Node = Node->NextPeer;
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}
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return NULL;
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}
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PCHARNODE
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pAddCharNode (
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IN PMAPSTRUCT Map,
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IN PCHARNODE PrevNode, OPTIONAL
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IN WORD Char,
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IN WORD Flags
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)
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{
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PCHARNODE Node;
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PCHARNODEEX exNode;
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if (Map->UsesExNode) {
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exNode = PoolMemGetAlignedMemory (Map->Pool, sizeof (CHARNODEEX));
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Node = (PCHARNODE) exNode;
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MYASSERT (Node);
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ZeroMemory (exNode, sizeof (CHARNODEEX));
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} else {
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Node = PoolMemGetAlignedMemory (Map->Pool, sizeof (CHARNODE));
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MYASSERT (Node);
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ZeroMemory (Node, sizeof (CHARNODE));
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}
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Node->Char = Char;
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Node->Flags = Flags;
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if (PrevNode) {
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Node->NextPeer = PrevNode->NextLevel;
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PrevNode->NextLevel = Node;
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} else {
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Node->NextPeer = Map->FirstLevelRoot;
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Map->FirstLevelRoot = Node;
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}
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return Node;
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}
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VOID
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AddStringMappingPairExA (
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IN OUT PMAPSTRUCT Map,
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IN PCSTR Old,
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IN PCSTR New,
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IN REG_REPLACE_FILTER Filter, OPTIONAL
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IN ULONG_PTR ExtraData, OPTIONAL
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IN DWORD Flags
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)
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/*++
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Routine Description:
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AddStringMappingPairEx adds a search and replace string pair to the linked
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list data structures. If the same search string is already in the
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structures, then the replace string and optional extra data is updated.
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Arguments:
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Map - Specifies the string mapping
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Old - Specifies the search string
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New - Specifies the replace string
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Filter - Specifies the callback filter. This is only supported if the
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map was created with filter support enabled.
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ExtraData - Specifies arbitrary data to assign to the search/replace pair.
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This is only valid if the map was created with extra data
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enabled.
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Flags - Specifies optional flag STRMAP_REQUIRE_WACK_OR_NUL
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Return Value:
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None.
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--*/
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{
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PSTR OldCopy;
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PSTR NewCopy;
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PCSTR p;
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WORD w;
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PCHARNODE Prev;
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PCHARNODE Node;
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PCHARNODEEX exNode;
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WORD nodeFlags = 0;
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if (Flags & STRMAP_REQUIRE_WACK_OR_NUL) {
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nodeFlags = CHARNODE_REQUIRE_WACK_OR_NUL;
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}
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MYASSERT (Map);
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MYASSERT (Old);
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MYASSERT (New);
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MYASSERT (*Old);
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//
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// Duplicate strings
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//
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OldCopy = PoolMemDuplicateStringA (Map->Pool, Old);
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NewCopy = PoolMemDuplicateStringA (Map->Pool, New);
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//
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// Make OldCopy all lowercase
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//
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CharLowerA (OldCopy);
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//
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// Add the letters that are not in the mapping
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//
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for (Prev = NULL, p = OldCopy ; *p ; p = _mbsinc (p)) {
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w = (WORD) _mbsnextc (p);
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Node = pFindCharNode (Map, Prev, w);
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if (!Node) {
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break;
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}
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Prev = Node;
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}
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for ( ; *p ; p = _mbsinc (p)) {
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w = (WORD) _mbsnextc (p);
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nodeFlags |= (WORD) (IsLeadByte (*p) ? CHARNODE_DOUBLE_BYTE : CHARNODE_SINGLE_BYTE);
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Prev = pAddCharNode (Map, Prev, w, nodeFlags);
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}
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if (Prev) {
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StringCopyA (OldCopy, Old);
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Prev->OriginalStr = (PVOID) OldCopy;
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Prev->ReplacementStr = (PVOID) NewCopy;
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Prev->ReplacementBytes = ByteCountA (NewCopy);
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exNode = (PCHARNODEEX) Prev;
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if (Map->UsesExtraData) {
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exNode->ExtraData = ExtraData;
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}
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if (Map->UsesFilter) {
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exNode->Filter = Filter;
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}
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}
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}
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VOID
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AddStringMappingPairExW (
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IN OUT PMAPSTRUCT Map,
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IN PCWSTR Old,
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IN PCWSTR New,
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IN REG_REPLACE_FILTER Filter, OPTIONAL
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IN ULONG_PTR ExtraData, OPTIONAL
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IN DWORD Flags
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)
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/*++
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Routine Description:
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AddStringMappingPairEx adds a search and replace string pair to the linked
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list data structures. If the same search string is already in the
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structures, then the replace string and optional extra data is updated.
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Arguments:
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Map - Specifies the string mapping
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Old - Specifies the search string
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New - Specifies the replace string
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Filter - Specifies the callback filter. This is only supported if the
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map was created with filter support enabled.
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ExtraData - Specifies arbitrary data to assign to the search/replace pair.
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This is only valid if the map was created with extra data
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enabled.
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Flags - Specifies optional flag STRMAP_REQUIRE_WACK_OR_NUL
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Return Value:
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None.
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--*/
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{
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PWSTR OldCopy;
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PWSTR NewCopy;
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PCWSTR p;
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WORD w;
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PCHARNODE Prev;
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PCHARNODE Node;
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PCHARNODEEX exNode;
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WORD nodeFlags = 0;
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if (Flags & STRMAP_REQUIRE_WACK_OR_NUL) {
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nodeFlags = CHARNODE_REQUIRE_WACK_OR_NUL;
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}
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MYASSERT (Map);
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MYASSERT (Old);
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MYASSERT (New);
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MYASSERT (*Old);
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//
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// Duplicate strings
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//
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OldCopy = PoolMemDuplicateStringW (Map->Pool, Old);
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NewCopy = PoolMemDuplicateStringW (Map->Pool, New);
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//
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// Make OldCopy all lowercase
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//
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CharLowerW (OldCopy);
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//
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// Add the letters that are not in the mapping
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//
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Prev = NULL;
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p = OldCopy;
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while (w = *p) { // intentional assignment optimization
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Node = pFindCharNode (Map, Prev, w);
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if (!Node) {
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break;
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}
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Prev = Node;
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p++;
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}
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while (w = *p) { // intentional assignment optimization
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Prev = pAddCharNode (Map, Prev, w, nodeFlags);
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p++;
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}
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if (Prev) {
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StringCopyW (OldCopy, Old);
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Prev->OriginalStr = OldCopy;
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Prev->ReplacementStr = (PVOID) NewCopy;
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Prev->ReplacementBytes = ByteCountW (NewCopy);
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exNode = (PCHARNODEEX) Prev;
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if (Map->UsesExtraData) {
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exNode->ExtraData = ExtraData;
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}
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if (Map->UsesFilter) {
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exNode->Filter = Filter;
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}
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}
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}
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PCSTR
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pFindReplacementStringInOneMapA (
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IN PMAPSTRUCT Map,
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IN PCSTR Source,
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IN INT MaxSourceBytes,
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OUT PINT SourceBytesPtr,
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OUT PINT ReplacementBytesPtr,
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IN PREG_REPLACE_DATA Data,
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OUT ULONG_PTR *ExtraDataValue, OPTIONAL
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IN BOOL RequireWackOrNul
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)
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{
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PCHARNODE BestMatch;
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PCHARNODE Node;
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WORD Char;
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PCSTR OrgSource;
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PCSTR newString;
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INT newStringSizeInBytes;
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PCHARNODEEX exNode;
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BOOL replacementFound;
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*SourceBytesPtr = 0;
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Node = NULL;
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BestMatch = NULL;
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OrgSource = Source;
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while (*Source) {
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Char = (WORD) _mbsnextc (Source);
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Node = pFindCharNode (Map, Node, Char);
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if (Node) {
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//
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// Advance string pointer
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//
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if (Node->Flags & CHARNODE_DOUBLE_BYTE) {
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Source += 2;
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} else {
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Source++;
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}
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if (((PBYTE) Source - (PBYTE) OrgSource) > MaxSourceBytes) {
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break;
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}
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//
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// If replacement string is available, keep it
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// until a longer match comes along
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//
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replacementFound = (Node->ReplacementStr != NULL);
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if ((RequireWackOrNul || (Node->Flags & CHARNODE_REQUIRE_WACK_OR_NUL)) && replacementFound) {
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if (*Source && _mbsnextc (Source) != '\\') {
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replacementFound = FALSE;
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}
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}
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if (replacementFound) {
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newString = (PCSTR) Node->ReplacementStr;
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newStringSizeInBytes = Node->ReplacementBytes;
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if (Map->UsesFilter) {
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//
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// Call rename filter to allow denial of match
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//
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exNode = (PCHARNODEEX) Node;
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if (exNode->Filter) {
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Data->Ansi.BeginningOfMatch = OrgSource;
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Data->Ansi.OldSubString = (PCSTR) Node->OriginalStr;
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Data->Ansi.NewSubString = newString;
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Data->Ansi.NewSubStringSizeInBytes = newStringSizeInBytes;
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if (!exNode->Filter (Data)) {
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replacementFound = FALSE;
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} else {
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newString = Data->Ansi.NewSubString;
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newStringSizeInBytes = Data->Ansi.NewSubStringSizeInBytes;
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}
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}
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}
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if (replacementFound) {
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BestMatch = Node;
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*SourceBytesPtr = (HALF_PTR) ((PBYTE) Source - (PBYTE) OrgSource);
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}
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}
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} else {
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//
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// No Node ends the search
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//
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break;
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}
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}
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if (BestMatch) {
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//
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// Return replacement data to caller
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//
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if (ExtraDataValue) {
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if (Map->UsesExtraData) {
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exNode = (PCHARNODEEX) BestMatch;
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*ExtraDataValue = exNode->ExtraData;
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} else {
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*ExtraDataValue = 0;
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}
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}
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*ReplacementBytesPtr = newStringSizeInBytes;
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return newString;
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}
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return NULL;
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}
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|
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PCSTR
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pFindReplacementStringA (
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IN PMAPSTRUCT *MapArray,
|
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IN UINT MapArrayCount,
|
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IN PCSTR Source,
|
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IN INT MaxSourceBytes,
|
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OUT PINT SourceBytesPtr,
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OUT PINT ReplacementBytesPtr,
|
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IN PREG_REPLACE_DATA Data,
|
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OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
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IN BOOL RequireWackOrNul
|
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)
|
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{
|
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UINT u;
|
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PCSTR result;
|
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|
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for (u = 0 ; u < MapArrayCount ; u++) {
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|
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if (!MapArray[u]) {
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continue;
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}
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result = pFindReplacementStringInOneMapA (
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MapArray[u],
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Source,
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MaxSourceBytes,
|
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SourceBytesPtr,
|
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ReplacementBytesPtr,
|
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Data,
|
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ExtraDataValue,
|
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RequireWackOrNul
|
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);
|
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if (result) {
|
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return result;
|
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}
|
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}
|
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|
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return NULL;
|
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}
|
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|
|
|
|
PCWSTR
|
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pFindReplacementStringInOneMapW (
|
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IN PMAPSTRUCT Map,
|
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IN PCWSTR Source,
|
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IN INT MaxSourceBytes,
|
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OUT PINT SourceBytesPtr,
|
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OUT PINT ReplacementBytesPtr,
|
|
IN PREG_REPLACE_DATA Data,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
IN BOOL RequireWackOrNul
|
|
)
|
|
{
|
|
PCHARNODE BestMatch;
|
|
PCHARNODE Node;
|
|
PCWSTR OrgSource;
|
|
PCWSTR newString;
|
|
INT newStringSizeInBytes;
|
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BOOL replacementFound;
|
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PCHARNODEEX exNode;
|
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|
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*SourceBytesPtr = 0;
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|
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Node = NULL;
|
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BestMatch = NULL;
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OrgSource = Source;
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|
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while (*Source) {
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|
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Node = pFindCharNode (Map, Node, *Source);
|
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|
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if (Node) {
|
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//
|
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// Advance string pointer
|
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//
|
|
|
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Source++;
|
|
|
|
if (((PBYTE) Source - (PBYTE) OrgSource) > MaxSourceBytes) {
|
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break;
|
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}
|
|
|
|
//
|
|
// If replacement string is available, keep it
|
|
// until a longer match comes along
|
|
//
|
|
|
|
replacementFound = (Node->ReplacementStr != NULL);
|
|
|
|
if ((RequireWackOrNul || (Node->Flags & CHARNODE_REQUIRE_WACK_OR_NUL)) && replacementFound) {
|
|
|
|
if (*Source && *Source != L'\\') {
|
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replacementFound = FALSE;
|
|
}
|
|
}
|
|
|
|
if (replacementFound) {
|
|
|
|
newString = (PCWSTR) Node->ReplacementStr;
|
|
newStringSizeInBytes = Node->ReplacementBytes;
|
|
|
|
if (Map->UsesFilter) {
|
|
//
|
|
// Call rename filter to allow denial of match
|
|
//
|
|
|
|
exNode = (PCHARNODEEX) Node;
|
|
|
|
if (exNode->Filter) {
|
|
Data->Unicode.BeginningOfMatch = OrgSource;
|
|
Data->Unicode.OldSubString = (PCWSTR) Node->OriginalStr;
|
|
Data->Unicode.NewSubString = newString;
|
|
Data->Unicode.NewSubStringSizeInBytes = newStringSizeInBytes;
|
|
|
|
if (!exNode->Filter (Data)) {
|
|
replacementFound = FALSE;
|
|
} else {
|
|
newString = Data->Unicode.NewSubString;
|
|
newStringSizeInBytes = Data->Unicode.NewSubStringSizeInBytes;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (replacementFound) {
|
|
BestMatch = Node;
|
|
*SourceBytesPtr = (HALF_PTR) ((PBYTE) Source - (PBYTE) OrgSource);
|
|
}
|
|
}
|
|
|
|
} else {
|
|
//
|
|
// No Node ends the search
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
if (BestMatch) {
|
|
|
|
//
|
|
// Return replacement data to caller
|
|
//
|
|
|
|
if (ExtraDataValue) {
|
|
|
|
if (Map->UsesExtraData) {
|
|
exNode = (PCHARNODEEX) BestMatch;
|
|
*ExtraDataValue = exNode->ExtraData;
|
|
} else {
|
|
*ExtraDataValue = 0;
|
|
}
|
|
}
|
|
|
|
*ReplacementBytesPtr = newStringSizeInBytes;
|
|
return newString;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PCWSTR
|
|
pFindReplacementStringW (
|
|
IN PMAPSTRUCT *MapArray,
|
|
IN UINT MapArrayCount,
|
|
IN PCWSTR Source,
|
|
IN INT MaxSourceBytes,
|
|
OUT PINT SourceBytesPtr,
|
|
OUT PINT ReplacementBytesPtr,
|
|
IN PREG_REPLACE_DATA Data,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
IN BOOL RequireWackOrNul
|
|
)
|
|
{
|
|
UINT u;
|
|
PCWSTR result;
|
|
|
|
for (u = 0 ; u < MapArrayCount ; u++) {
|
|
|
|
if (!MapArray[u]) {
|
|
continue;
|
|
}
|
|
|
|
result = pFindReplacementStringInOneMapW (
|
|
MapArray[u],
|
|
Source,
|
|
MaxSourceBytes,
|
|
SourceBytesPtr,
|
|
ReplacementBytesPtr,
|
|
Data,
|
|
ExtraDataValue,
|
|
RequireWackOrNul
|
|
);
|
|
|
|
if (result) {
|
|
return result;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
BOOL
|
|
MappingMultiTableSearchAndReplaceExA (
|
|
IN PMAPSTRUCT *MapArray,
|
|
IN UINT MapArrayCount,
|
|
IN PCSTR SrcBuffer,
|
|
OUT PSTR Buffer, // can be the same as SrcBuffer
|
|
IN INT InboundBytes, OPTIONAL
|
|
OUT PINT OutboundBytesPtr, OPTIONAL
|
|
IN INT MaxSizeInBytes,
|
|
IN DWORD Flags,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
OUT PCSTR *EndOfString OPTIONAL
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
MappingSearchAndReplaceEx performs a search/replace operation based on the
|
|
specified string mapping. The replace can be in-place or to another buffer.
|
|
|
|
Arguments:
|
|
|
|
MapArray - Specifies an array of string mapping tables that holds
|
|
zero or more search/replace pairs
|
|
MapArrayCount - Specifies the number of mapping tables in MapArray
|
|
SrcBuffer - Specifies the source string that might contain one or
|
|
more search strings
|
|
Buffer - Specifies the outbound buffer. This arg can be the same
|
|
as SrcBuffer.
|
|
InboundBytes - Specifies the number of bytes in SrcBuffer to process,
|
|
or 0 to process a nul-terminated string in SrcBuffer.
|
|
If InboundBytes is specified, it must point to the nul
|
|
terminator of SrcBuffer.
|
|
OutbountBytesPtr - Receives the number of bytes that Buffer contains,
|
|
excluding the nul terminator.
|
|
MaxSizeInBytes - Specifies the size of Buffer, in bytes.
|
|
Flags - Specifies flags that control the search/replace:
|
|
STRMAP_COMPLETE_MATCH_ONLY
|
|
STRMAP_FIRST_CHAR_MUST_MATCH
|
|
STRMAP_RETURN_AFTER_FIRST_REPLACE
|
|
STRMAP_REQUIRE_WACK_OR_NUL
|
|
ExtraDataValue - Receives the extra data associated with the first search/
|
|
replace pair.
|
|
EndOfString - Receives a pointer to the end of the replace string, or
|
|
the nul pointer when the entire string is processed. The
|
|
pointer is within the string contained in Buffer.
|
|
|
|
--*/
|
|
|
|
{
|
|
UINT sizeOfTempBuf;
|
|
INT inboundSize;
|
|
PCSTR lowerCaseSrc;
|
|
PCSTR orgSrc;
|
|
PCSTR lowerSrcPos;
|
|
PCSTR orgSrcPos;
|
|
INT orgSrcBytesLeft;
|
|
PSTR destPos;
|
|
PCSTR lowerSrcEnd;
|
|
INT searchStringBytes;
|
|
INT replaceStringBytes;
|
|
INT destBytesLeft;
|
|
REG_REPLACE_DATA filterData;
|
|
PCSTR replaceString;
|
|
BOOL result = FALSE;
|
|
INT i;
|
|
PCSTR endPtr;
|
|
|
|
//
|
|
// Empty string case
|
|
//
|
|
|
|
if (*SrcBuffer == 0 || MaxSizeInBytes <= sizeof (CHAR)) {
|
|
if (MaxSizeInBytes >= sizeof (CHAR)) {
|
|
*Buffer = 0;
|
|
}
|
|
|
|
if (OutboundBytesPtr) {
|
|
*OutboundBytesPtr = 0;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// If caller did not specify inbound size, compute it now
|
|
//
|
|
|
|
if (!InboundBytes) {
|
|
InboundBytes = ByteCountA (SrcBuffer);
|
|
} else {
|
|
i = 0;
|
|
while (i < InboundBytes) {
|
|
if (IsLeadByte (SrcBuffer[i])) {
|
|
MYASSERT (SrcBuffer[i + 1]);
|
|
i += 2;
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (i > InboundBytes) {
|
|
InboundBytes--;
|
|
}
|
|
}
|
|
|
|
inboundSize = InboundBytes + sizeof (CHAR);
|
|
|
|
//
|
|
// Allocate a buffer big enough for the lower-cased input string,
|
|
// plus (optionally) a copy of the entire destination buffer. Then
|
|
// copy the data to the buffer.
|
|
//
|
|
|
|
sizeOfTempBuf = inboundSize;
|
|
|
|
if (SrcBuffer == Buffer) {
|
|
sizeOfTempBuf += MaxSizeInBytes;
|
|
}
|
|
|
|
lowerCaseSrc = AllocTextA (sizeOfTempBuf);
|
|
if (!lowerCaseSrc) {
|
|
return FALSE;
|
|
}
|
|
|
|
CopyMemory ((PSTR) lowerCaseSrc, SrcBuffer, InboundBytes);
|
|
*((PSTR) ((PBYTE) lowerCaseSrc + InboundBytes)) = 0;
|
|
|
|
CharLowerBuffA ((PSTR) lowerCaseSrc, InboundBytes / sizeof (CHAR));
|
|
|
|
if (SrcBuffer == Buffer && !(Flags & STRMAP_COMPLETE_MATCH_ONLY)) {
|
|
orgSrc = (PCSTR) ((PBYTE) lowerCaseSrc + inboundSize);
|
|
|
|
//
|
|
// If we are processing entire inbound string, then just copy the
|
|
// whole string. Otherwise, copy the entire destination buffer, so we
|
|
// don't lose data beyond the partial inbound string.
|
|
//
|
|
|
|
if (*((PCSTR) ((PBYTE) SrcBuffer + InboundBytes))) {
|
|
CopyMemory ((PSTR) orgSrc, SrcBuffer, MaxSizeInBytes);
|
|
} else {
|
|
CopyMemory ((PSTR) orgSrc, SrcBuffer, inboundSize);
|
|
}
|
|
|
|
} else {
|
|
orgSrc = SrcBuffer;
|
|
}
|
|
|
|
//
|
|
// Walk the lower cased string, looking for strings to replace
|
|
//
|
|
|
|
orgSrcPos = orgSrc;
|
|
|
|
lowerSrcPos = lowerCaseSrc;
|
|
lowerSrcEnd = (PCSTR) ((PBYTE) lowerSrcPos + InboundBytes);
|
|
|
|
destPos = Buffer;
|
|
destBytesLeft = MaxSizeInBytes - sizeof (CHAR);
|
|
|
|
filterData.UnicodeData = FALSE;
|
|
filterData.Ansi.OriginalString = orgSrc;
|
|
filterData.Ansi.CurrentString = Buffer;
|
|
|
|
endPtr = NULL;
|
|
|
|
while (lowerSrcPos < lowerSrcEnd) {
|
|
|
|
replaceString = pFindReplacementStringA (
|
|
MapArray,
|
|
MapArrayCount,
|
|
lowerSrcPos,
|
|
(HALF_PTR) ((PBYTE) lowerSrcEnd - (PBYTE) lowerSrcPos),
|
|
&searchStringBytes,
|
|
&replaceStringBytes,
|
|
&filterData,
|
|
ExtraDataValue,
|
|
(Flags & STRMAP_REQUIRE_WACK_OR_NUL) != 0
|
|
);
|
|
|
|
if (replaceString) {
|
|
|
|
//
|
|
// Implement complete match flag
|
|
//
|
|
|
|
if (Flags & STRMAP_COMPLETE_MATCH_ONLY) {
|
|
if (InboundBytes != searchStringBytes) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
result = TRUE;
|
|
|
|
//
|
|
// Verify replacement string isn't growing string too much. If it
|
|
// is, truncate the replacement string.
|
|
//
|
|
|
|
if (destBytesLeft < replaceStringBytes) {
|
|
|
|
//
|
|
// Respect logical dbcs characters
|
|
//
|
|
|
|
replaceStringBytes = 0;
|
|
i = 0;
|
|
|
|
while (i < destBytesLeft) {
|
|
MYASSERT (replaceString[i]);
|
|
|
|
if (IsLeadByte (replaceString[i])) {
|
|
MYASSERT (replaceString[i + 1]);
|
|
i += 2;
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (i > destBytesLeft) {
|
|
destBytesLeft--;
|
|
}
|
|
|
|
replaceStringBytes = destBytesLeft;
|
|
|
|
} else {
|
|
destBytesLeft -= replaceStringBytes;
|
|
}
|
|
|
|
//
|
|
// Transfer the memory
|
|
//
|
|
|
|
CopyMemory (destPos, replaceString, replaceStringBytes);
|
|
|
|
destPos = (PSTR) ((PBYTE) destPos + replaceStringBytes);
|
|
lowerSrcPos = (PCSTR) ((PBYTE) lowerSrcPos + searchStringBytes);
|
|
orgSrcPos = (PCSTR) ((PBYTE) orgSrcPos + searchStringBytes);
|
|
|
|
//
|
|
// Implement single match flag
|
|
//
|
|
|
|
if (Flags & STRMAP_RETURN_AFTER_FIRST_REPLACE) {
|
|
endPtr = destPos;
|
|
break;
|
|
}
|
|
|
|
} else if (Flags & (STRMAP_FIRST_CHAR_MUST_MATCH|STRMAP_COMPLETE_MATCH_ONLY)) {
|
|
//
|
|
// This string does not match any search strings
|
|
//
|
|
|
|
break;
|
|
|
|
} else {
|
|
//
|
|
// This character does not match, so copy it to the destination and
|
|
// try the next string.
|
|
//
|
|
|
|
if (IsLeadByte (*orgSrcPos)) {
|
|
|
|
//
|
|
// Copy double-byte character
|
|
//
|
|
|
|
if (destBytesLeft < sizeof (CHAR) * 2) {
|
|
break;
|
|
}
|
|
|
|
MYASSERT (sizeof (CHAR) * 2 == sizeof (WORD));
|
|
|
|
*((PWORD) destPos)++ = *((PWORD) orgSrcPos)++;
|
|
destBytesLeft -= sizeof (WORD);
|
|
lowerSrcPos = (PCSTR) ((PBYTE) lowerSrcPos + sizeof (WORD));
|
|
|
|
} else {
|
|
|
|
//
|
|
// Copy single-byte character
|
|
//
|
|
|
|
if (destBytesLeft < sizeof (CHAR)) {
|
|
break;
|
|
}
|
|
|
|
*destPos++ = *orgSrcPos++;
|
|
destBytesLeft -= sizeof (CHAR);
|
|
lowerSrcPos++;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Copy any remaining part of the original source to the
|
|
// destination, unless destPos == Buffer == SrcBuffer
|
|
//
|
|
|
|
if (destPos != SrcBuffer) {
|
|
|
|
if (*orgSrcPos) {
|
|
orgSrcBytesLeft = ByteCountA (orgSrcPos);
|
|
orgSrcBytesLeft = min (orgSrcBytesLeft, destBytesLeft);
|
|
|
|
CopyMemory (destPos, orgSrcPos, orgSrcBytesLeft);
|
|
destPos = (PSTR) ((PBYTE) destPos + orgSrcBytesLeft);
|
|
}
|
|
|
|
MYASSERT ((PBYTE) (destPos + 1) <= ((PBYTE) Buffer + MaxSizeInBytes));
|
|
*destPos = 0;
|
|
|
|
if (!endPtr) {
|
|
endPtr = destPos;
|
|
}
|
|
|
|
} else {
|
|
|
|
MYASSERT (SrcBuffer == Buffer);
|
|
if (EndOfString || OutboundBytesPtr) {
|
|
endPtr = GetEndOfStringA (destPos);
|
|
}
|
|
}
|
|
|
|
if (EndOfString) {
|
|
MYASSERT (endPtr);
|
|
*EndOfString = endPtr;
|
|
}
|
|
|
|
if (OutboundBytesPtr) {
|
|
MYASSERT (endPtr);
|
|
if (*endPtr) {
|
|
endPtr = GetEndOfStringA (endPtr);
|
|
}
|
|
|
|
*OutboundBytesPtr = (HALF_PTR) ((PBYTE) endPtr - (PBYTE) Buffer);
|
|
}
|
|
|
|
FreeTextA (lowerCaseSrc);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
BOOL
|
|
MappingMultiTableSearchAndReplaceExW (
|
|
IN PMAPSTRUCT *MapArray,
|
|
IN UINT MapArrayCount,
|
|
IN PCWSTR SrcBuffer,
|
|
OUT PWSTR Buffer, // can be the same as SrcBuffer
|
|
IN INT InboundBytes, OPTIONAL
|
|
OUT PINT OutboundBytesPtr, OPTIONAL
|
|
IN INT MaxSizeInBytes,
|
|
IN DWORD Flags,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
OUT PCWSTR *EndOfString OPTIONAL
|
|
)
|
|
{
|
|
UINT sizeOfTempBuf;
|
|
INT inboundSize;
|
|
PCWSTR lowerCaseSrc;
|
|
PCWSTR orgSrc;
|
|
PCWSTR lowerSrcPos;
|
|
PCWSTR orgSrcPos;
|
|
INT orgSrcBytesLeft;
|
|
PWSTR destPos;
|
|
PCWSTR lowerSrcEnd;
|
|
INT searchStringBytes;
|
|
INT replaceStringBytes;
|
|
INT destBytesLeft;
|
|
REG_REPLACE_DATA filterData;
|
|
PCWSTR replaceString;
|
|
BOOL result = FALSE;
|
|
PCWSTR endPtr;
|
|
|
|
//
|
|
// Empty string case
|
|
//
|
|
|
|
if (*SrcBuffer == 0 || MaxSizeInBytes <= sizeof (CHAR)) {
|
|
if (MaxSizeInBytes >= sizeof (CHAR)) {
|
|
*Buffer = 0;
|
|
}
|
|
|
|
if (OutboundBytesPtr) {
|
|
*OutboundBytesPtr = 0;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// If caller did not specify inbound size, compute it now
|
|
//
|
|
|
|
if (!InboundBytes) {
|
|
InboundBytes = ByteCountW (SrcBuffer);
|
|
} else {
|
|
InboundBytes = (InboundBytes / sizeof (WCHAR)) * sizeof (WCHAR);
|
|
}
|
|
|
|
|
|
inboundSize = InboundBytes + sizeof (WCHAR);
|
|
|
|
//
|
|
// Allocate a buffer big enough for the lower-cased input string,
|
|
// plus (optionally) a copy of the entire destination buffer. Then
|
|
// copy the data to the buffer.
|
|
//
|
|
|
|
sizeOfTempBuf = inboundSize;
|
|
|
|
if (SrcBuffer == Buffer) {
|
|
sizeOfTempBuf += MaxSizeInBytes;
|
|
}
|
|
|
|
lowerCaseSrc = AllocTextW (sizeOfTempBuf);
|
|
if (!lowerCaseSrc) {
|
|
return FALSE;
|
|
}
|
|
|
|
CopyMemory ((PWSTR) lowerCaseSrc, SrcBuffer, InboundBytes);
|
|
*((PWSTR) ((PBYTE) lowerCaseSrc + InboundBytes)) = 0;
|
|
|
|
CharLowerBuffW ((PWSTR) lowerCaseSrc, InboundBytes / sizeof (WCHAR));
|
|
|
|
if (SrcBuffer == Buffer && !(Flags & STRMAP_COMPLETE_MATCH_ONLY)) {
|
|
orgSrc = (PCWSTR) ((PBYTE) lowerCaseSrc + inboundSize);
|
|
|
|
//
|
|
// If we are processing entire inbound string, then just copy the
|
|
// whole string. Otherwise, copy the entire destination buffer, so we
|
|
// don't lose data beyond the partial inbound string.
|
|
//
|
|
|
|
if (*((PCWSTR) ((PBYTE) SrcBuffer + InboundBytes))) {
|
|
CopyMemory ((PWSTR) orgSrc, SrcBuffer, MaxSizeInBytes);
|
|
} else {
|
|
CopyMemory ((PWSTR) orgSrc, SrcBuffer, inboundSize);
|
|
}
|
|
|
|
} else {
|
|
orgSrc = SrcBuffer;
|
|
}
|
|
|
|
//
|
|
// Walk the lower cased string, looking for strings to replace
|
|
//
|
|
|
|
orgSrcPos = orgSrc;
|
|
|
|
lowerSrcPos = lowerCaseSrc;
|
|
lowerSrcEnd = (PCWSTR) ((PBYTE) lowerSrcPos + InboundBytes);
|
|
|
|
destPos = Buffer;
|
|
destBytesLeft = MaxSizeInBytes - sizeof (WCHAR);
|
|
|
|
filterData.UnicodeData = TRUE;
|
|
filterData.Unicode.OriginalString = orgSrc;
|
|
filterData.Unicode.CurrentString = Buffer;
|
|
|
|
endPtr = NULL;
|
|
|
|
while (lowerSrcPos < lowerSrcEnd) {
|
|
|
|
replaceString = pFindReplacementStringW (
|
|
MapArray,
|
|
MapArrayCount,
|
|
lowerSrcPos,
|
|
(HALF_PTR) ((PBYTE) lowerSrcEnd - (PBYTE) lowerSrcPos),
|
|
&searchStringBytes,
|
|
&replaceStringBytes,
|
|
&filterData,
|
|
ExtraDataValue,
|
|
(Flags & STRMAP_REQUIRE_WACK_OR_NUL) != 0
|
|
);
|
|
|
|
if (replaceString) {
|
|
|
|
//
|
|
// Implement complete match flag
|
|
//
|
|
|
|
if (Flags & STRMAP_COMPLETE_MATCH_ONLY) {
|
|
if (InboundBytes != searchStringBytes) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
result = TRUE;
|
|
|
|
//
|
|
// Verify replacement string isn't growing string too much. If it
|
|
// is, truncate the replacement string.
|
|
//
|
|
|
|
if (destBytesLeft < replaceStringBytes) {
|
|
replaceStringBytes = destBytesLeft;
|
|
} else {
|
|
destBytesLeft -= replaceStringBytes;
|
|
}
|
|
|
|
//
|
|
// Transfer the memory
|
|
//
|
|
|
|
CopyMemory (destPos, replaceString, replaceStringBytes);
|
|
|
|
destPos = (PWSTR) ((PBYTE) destPos + replaceStringBytes);
|
|
lowerSrcPos = (PCWSTR) ((PBYTE) lowerSrcPos + searchStringBytes);
|
|
orgSrcPos = (PCWSTR) ((PBYTE) orgSrcPos + searchStringBytes);
|
|
|
|
//
|
|
// Implement single match flag
|
|
//
|
|
|
|
if (Flags & STRMAP_RETURN_AFTER_FIRST_REPLACE) {
|
|
endPtr = destPos;
|
|
break;
|
|
}
|
|
|
|
} else if (Flags & (STRMAP_FIRST_CHAR_MUST_MATCH|STRMAP_COMPLETE_MATCH_ONLY)) {
|
|
//
|
|
// This string does not match any search strings
|
|
//
|
|
|
|
break;
|
|
|
|
} else {
|
|
//
|
|
// This character does not match, so copy it to the destination and
|
|
// try the next string.
|
|
//
|
|
|
|
if (destBytesLeft < sizeof (WCHAR)) {
|
|
break;
|
|
}
|
|
|
|
*destPos++ = *orgSrcPos++;
|
|
destBytesLeft -= sizeof (WCHAR);
|
|
lowerSrcPos++;
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
// Copy any remaining part of the original source to the
|
|
// destination, unless destPos == Buffer == SrcBuffer
|
|
//
|
|
|
|
if (destPos != SrcBuffer) {
|
|
|
|
if (*orgSrcPos) {
|
|
orgSrcBytesLeft = ByteCountW (orgSrcPos);
|
|
orgSrcBytesLeft = min (orgSrcBytesLeft, destBytesLeft);
|
|
|
|
CopyMemory (destPos, orgSrcPos, orgSrcBytesLeft);
|
|
destPos = (PWSTR) ((PBYTE) destPos + orgSrcBytesLeft);
|
|
}
|
|
|
|
MYASSERT ((PBYTE) (destPos + 1) <= ((PBYTE) Buffer + MaxSizeInBytes));
|
|
*destPos = 0;
|
|
|
|
if (!endPtr) {
|
|
endPtr = destPos;
|
|
}
|
|
|
|
} else {
|
|
|
|
MYASSERT (SrcBuffer == Buffer);
|
|
if (EndOfString || OutboundBytesPtr) {
|
|
endPtr = GetEndOfStringW (destPos);
|
|
}
|
|
}
|
|
|
|
if (EndOfString) {
|
|
MYASSERT (endPtr);
|
|
*EndOfString = endPtr;
|
|
}
|
|
|
|
if (OutboundBytesPtr) {
|
|
MYASSERT (endPtr);
|
|
if (*endPtr) {
|
|
endPtr = GetEndOfStringW (endPtr);
|
|
}
|
|
|
|
*OutboundBytesPtr = (HALF_PTR) ((PBYTE) endPtr - (PBYTE) Buffer);
|
|
}
|
|
|
|
FreeTextW (lowerCaseSrc);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
BOOL
|
|
MappingSearchAndReplaceExA (
|
|
IN PMAPSTRUCT Map,
|
|
IN PCSTR SrcBuffer,
|
|
OUT PSTR Buffer, // can be the same as SrcBuffer
|
|
IN INT InboundBytes, OPTIONAL
|
|
OUT PINT OutboundBytesPtr, OPTIONAL
|
|
IN INT MaxSizeInBytes,
|
|
IN DWORD Flags,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
OUT PCSTR *EndOfString OPTIONAL
|
|
)
|
|
{
|
|
return MappingMultiTableSearchAndReplaceExA (
|
|
&Map,
|
|
1,
|
|
SrcBuffer,
|
|
Buffer,
|
|
InboundBytes,
|
|
OutboundBytesPtr,
|
|
MaxSizeInBytes,
|
|
Flags,
|
|
ExtraDataValue,
|
|
EndOfString
|
|
);
|
|
}
|
|
|
|
BOOL
|
|
MappingSearchAndReplaceExW (
|
|
IN PMAPSTRUCT Map,
|
|
IN PCWSTR SrcBuffer,
|
|
OUT PWSTR Buffer, // can be the same as SrcBuffer
|
|
IN INT InboundBytes, OPTIONAL
|
|
OUT PINT OutboundBytesPtr, OPTIONAL
|
|
IN INT MaxSizeInBytes,
|
|
IN DWORD Flags,
|
|
OUT ULONG_PTR *ExtraDataValue, OPTIONAL
|
|
OUT PCWSTR *EndOfString OPTIONAL
|
|
)
|
|
{
|
|
return MappingMultiTableSearchAndReplaceExW (
|
|
&Map,
|
|
1,
|
|
SrcBuffer,
|
|
Buffer,
|
|
InboundBytes,
|
|
OutboundBytesPtr,
|
|
MaxSizeInBytes,
|
|
Flags,
|
|
ExtraDataValue,
|
|
EndOfString
|
|
);
|
|
}
|