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hhctrl.ocx: Rewrite reading strings from #STRINGS section.

This commit is contained in:
Jacek Caban 2007-02-22 22:51:36 +01:00 committed by Alexandre Julliard
parent 07ba45775c
commit e717dcc8fa
2 changed files with 82 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

123
dlls/hhctrl.ocx/chm.c
View File

@ -2,6 +2,7 @@
* CHM Utility API
*
* Copyright 2005 James Hawkins
* Copyright 2007 Jacek Caban
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -20,57 +21,55 @@
#include "hhctrl.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(htmlhelp);
#define BLOCK_BITS 12
#define BLOCK_SIZE (1 << BLOCK_BITS)
#define BLOCK_MASK (BLOCK_SIZE-1)
/* Reads a string from the #STRINGS section in the CHM file */
static LPWSTR CHM_ReadString(CHMInfo *pChmInfo, DWORD dwOffset)
static LPCSTR GetChmString(CHMInfo *chm, DWORD offset)
{
LARGE_INTEGER liOffset;
IStorage *pStorage = pChmInfo->pStorage;
IStream *pStream;
DWORD cbRead;
ULONG iPos;
DWORD dwSize;
LPSTR szString;
LPWSTR stringW;
const int CB_READ_BLOCK = 64;
static const WCHAR stringsW[] = {'#','S','T','R','I','N','G','S',0};
dwSize = CB_READ_BLOCK;
szString = hhctrl_alloc(dwSize);
if (FAILED(IStorage_OpenStream(pStorage, stringsW, NULL, STGM_READ, 0, &pStream)))
if(!chm->strings_stream)
return NULL;
liOffset.QuadPart = dwOffset;
if (FAILED(IStream_Seek(pStream, liOffset, STREAM_SEEK_SET, NULL)))
{
IStream_Release(pStream);
return NULL;
if(chm->strings_size <= (offset >> BLOCK_BITS)) {
if(chm->strings)
chm->strings = hhctrl_realloc_zero(chm->strings,
chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
else
chm->strings = hhctrl_alloc_zero(
chm->strings_size = ((offset >> BLOCK_BITS)+1)*sizeof(char*));
}
while (SUCCEEDED(IStream_Read(pStream, szString, CB_READ_BLOCK, &cbRead)))
{
if (!cbRead)
return NULL;
if(!chm->strings[offset >> BLOCK_BITS]) {
LARGE_INTEGER pos;
DWORD read;
HRESULT hres;
for (iPos = 0; iPos < cbRead; iPos++)
{
if (!szString[iPos])
{
stringW = strdupAtoW(szString);
hhctrl_free(szString);
return stringW;
}
pos.QuadPart = offset & ~BLOCK_MASK;
hres = IStream_Seek(chm->strings_stream, pos, STREAM_SEEK_SET, NULL);
if(FAILED(hres)) {
WARN("Seek failed: %08x\n", hres);
return NULL;
}
dwSize *= 2;
szString = hhctrl_realloc(szString, dwSize);
szString += cbRead;
chm->strings[offset >> BLOCK_BITS] = hhctrl_alloc(BLOCK_SIZE);
hres = IStream_Read(chm->strings_stream, chm->strings[offset >> BLOCK_BITS],
BLOCK_SIZE, &read);
if(FAILED(hres)) {
WARN("Read failed: %08x\n", hres);
hhctrl_free(chm->strings[offset >> BLOCK_BITS]);
chm->strings[offset >> BLOCK_BITS] = NULL;
return NULL;
}
}
/* didn't find a string */
return NULL;
return chm->strings[offset >> BLOCK_BITS] + (offset & BLOCK_MASK);
}
/* Loads the HH_WINTYPE data from the CHM file
@ -103,16 +102,16 @@ BOOL CHM_LoadWinTypeFromCHM(CHMInfo *pChmInfo, HH_WINTYPEW *pHHWinType)
if (FAILED(hr)) goto done;
/* convert the #STRINGS offsets to actual strings */
pHHWinType->pszType = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszType);
pHHWinType->pszCaption = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszCaption);
pHHWinType->pszToc = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszToc);
pHHWinType->pszIndex = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszIndex);
pHHWinType->pszFile = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszFile);
pHHWinType->pszHome = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszHome);
pHHWinType->pszJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump1);
pHHWinType->pszJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszJump2);
pHHWinType->pszUrlJump1 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump1);
pHHWinType->pszUrlJump2 = CHM_ReadString(pChmInfo, (DWORD)pHHWinType->pszUrlJump2);
pHHWinType->pszType = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszType));
pHHWinType->pszCaption = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszCaption));
pHHWinType->pszToc = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszToc));
pHHWinType->pszIndex = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszIndex));
pHHWinType->pszFile = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszFile));
pHHWinType->pszHome = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszHome));
pHHWinType->pszJump1 = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszJump1));
pHHWinType->pszJump2 = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszJump2));
pHHWinType->pszUrlJump1 = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszUrlJump1));
pHHWinType->pszUrlJump2 = strdupAtoW(GetChmString(pChmInfo, (DWORD)pHHWinType->pszUrlJump2));
/* FIXME: pszCustomTabs is a list of multiple zero-terminated strings so ReadString won't
* work in this case
@ -130,6 +129,10 @@ done:
/* Opens the CHM file for reading */
BOOL CHM_OpenCHM(CHMInfo *pChmInfo, LPCWSTR szFile)
{
HRESULT hres;
static const WCHAR wszSTRINGS[] = {'#','S','T','R','I','N','G','S',0};
pChmInfo->szFile = szFile;
if (FAILED(CoCreateInstance(&CLSID_ITStorage, NULL, CLSCTX_INPROC_SERVER,
@ -141,6 +144,16 @@ BOOL CHM_OpenCHM(CHMInfo *pChmInfo, LPCWSTR szFile)
NULL, 0, &pChmInfo->pStorage)))
return FALSE;
hres = IStorage_OpenStream(pChmInfo->pStorage, wszSTRINGS, NULL, STGM_READ, 0,
&pChmInfo->strings_stream);
if(FAILED(hres)) {
WARN("Could not open #STRINGS stream: %08x\n", hres);
return FALSE;
}
pChmInfo->strings = NULL;
pChmInfo->strings_size = 0;
return TRUE;
}
@ -148,4 +161,14 @@ void CHM_CloseCHM(CHMInfo *pCHMInfo)
{
IITStorage_Release(pCHMInfo->pITStorage);
IStorage_Release(pCHMInfo->pStorage);
IStream_Release(pCHMInfo->strings_stream);
if(pCHMInfo->strings_size) {
int i;
for(i=0; i<pCHMInfo->strings_size; i++)
hhctrl_free(pCHMInfo->strings[i]);
}
hhctrl_free(pCHMInfo->strings);
}

9
dlls/hhctrl.ocx/hhctrl.h
View File

@ -50,6 +50,10 @@ typedef struct CHMInfo
IITStorage *pITStorage;
IStorage *pStorage;
LPCWSTR szFile;
IStream *strings_stream;
char **strings;
DWORD strings_size;
} CHMInfo;
@ -87,6 +91,11 @@ static inline void *hhctrl_realloc(void *mem, size_t len)
return HeapReAlloc(GetProcessHeap(), 0, mem, len);
}
static inline void *hhctrl_realloc_zero(void *mem, size_t len)
{
return HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, mem, len);
}
static inline BOOL hhctrl_free(void *mem)
{
return HeapFree(GetProcessHeap(), 0, mem);