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winhelp: Export enum and search B+ tree functions.
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@ -76,18 +76,6 @@ static struct
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HLPFILE_LINK* link;
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} attributes;
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/*
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* Compare function type for HLPFILE_BPTreeSearch function.
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*
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* PARAMS
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* p [I] pointer to testing block (key + data)
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* key [I] pointer to key value to look for
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* leaf [I] whether this function called for index of leaf page
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* next [O] pointer to pointer to next block
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*/
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typedef int (*HLPFILE_BPTreeCompare)(void *p, const void *key,
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int leaf, void **next);
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static BOOL HLPFILE_DoReadHlpFile(HLPFILE*, LPCSTR);
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static BOOL HLPFILE_ReadFileToBuffer(HFILE);
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static BOOL HLPFILE_FindSubFile(LPCSTR name, BYTE**, BYTE**);
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@ -106,8 +94,6 @@ static BOOL HLPFILE_Uncompress3(char*, const char*, const BYTE*, const BYTE*);
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static void HLPFILE_UncompressRLE(const BYTE* src, const BYTE* end, BYTE** dst, unsigned dstsz);
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static BOOL HLPFILE_ReadFont(HLPFILE* hlpfile);
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static void* HLPFILE_BPTreeSearch(BYTE*, const void*, HLPFILE_BPTreeCompare);
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/***********************************************************************
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*
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* HLPFILE_PageByNumber
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@ -1924,8 +1910,8 @@ static void HLPFILE_UncompressRLE(const BYTE* src, const BYTE* end, BYTE** dst,
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* Pointer to block identified by key, or NULL if failure.
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*
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*/
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static void* HLPFILE_BPTreeSearch(BYTE* buf, const void* key,
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HLPFILE_BPTreeCompare comp)
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void* HLPFILE_BPTreeSearch(BYTE* buf, const void* key,
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HLPFILE_BPTreeCompare comp)
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{
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unsigned magic;
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unsigned page_size;
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@ -1970,6 +1956,54 @@ static void* HLPFILE_BPTreeSearch(BYTE* buf, const void* key,
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return NULL;
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}
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/**************************************************************************
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* HLPFILE_BPTreeEnum
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*
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* Enumerates elements in B+ tree.
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*
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* PARAMS
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* buf [I] pointer to the embedded file structured as a B+ tree
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* cb [I] compare function
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* cookie [IO] cookie for cb function
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*/
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void HLPFILE_BPTreeEnum(BYTE* buf, HLPFILE_BPTreeCallback cb, void* cookie)
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{
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unsigned magic;
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unsigned page_size;
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unsigned cur_page;
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unsigned level;
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BYTE *pages, *ptr, *newptr;
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int i, entries;
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magic = GET_USHORT(buf, 9);
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if (magic != 0x293B)
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{
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WINE_ERR("Invalid magic in B+ tree: 0x%x\n", magic);
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return;
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}
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page_size = GET_USHORT(buf, 9+4);
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cur_page = GET_USHORT(buf, 9+26);
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level = GET_USHORT(buf, 9+32);
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pages = buf + 9 + 38;
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while (--level > 0)
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{
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ptr = pages + cur_page*page_size;
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cur_page = GET_USHORT(ptr, 4);
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}
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while (cur_page != 0xFFFF)
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{
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ptr = pages + cur_page*page_size;
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entries = GET_SHORT(ptr, 2);
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ptr += 8;
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for (i = 0; i < entries; i++)
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{
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cb(ptr, (void **)&newptr, cookie);
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ptr = newptr;
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}
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cur_page = GET_USHORT(pages+cur_page*page_size, 6);
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}
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}
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/***********************************************************************
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*
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@ -3,6 +3,7 @@
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*
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* Copyright 1996 Ulrich Schmid
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* 2002 Eric Pouech
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* 2007 Kirill K. Smirnov
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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@ -150,6 +151,28 @@ typedef struct tagHlpFileFile
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HLPFILE_WINDOWINFO* windows;
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} HLPFILE;
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/*
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* Compare function type for HLPFILE_BPTreeSearch function.
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*
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* PARAMS
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* p [I] pointer to testing block (key + data)
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* key [I] pointer to key value to look for
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* leaf [I] whether this function called for index of leaf page
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* next [O] pointer to pointer to next block
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*/
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typedef int (*HLPFILE_BPTreeCompare)(void *p, const void *key,
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int leaf, void **next);
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/*
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* Callback function type for HLPFILE_BPTreeEnum function.
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*
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* PARAMS
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* p [I] pointer to data block
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* next [O] pointer to pointer to next block
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* cookie [IO] cookie data
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*/
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typedef void (*HLPFILE_BPTreeCallback)(void *p, void **next, void *cookie);
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HLPFILE* HLPFILE_ReadHlpFile(LPCSTR lpszPath);
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HLPFILE_PAGE* HLPFILE_Contents(HLPFILE* hlpfile);
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HLPFILE_PAGE* HLPFILE_PageByHash(HLPFILE* hlpfile, LONG lHash);
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@ -158,3 +181,6 @@ HLPFILE_PAGE* HLPFILE_PageByOffset(HLPFILE* hlpfile, LONG offset);
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LONG HLPFILE_Hash(LPCSTR lpszContext);
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void HLPFILE_FreeLink(HLPFILE_LINK* link);
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void HLPFILE_FreeHlpFile(HLPFILE*);
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void* HLPFILE_BPTreeSearch(BYTE*, const void*, HLPFILE_BPTreeCompare);
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void HLPFILE_BPTreeEnum(BYTE*, HLPFILE_BPTreeCallback cb, void *cookie);
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