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added some checks for .mo integrity (part of patch 649438)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21822 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2003-07-09 22:35:56 +00:00
parent 19de4eecd5
commit 869c75498a
1 changed files with 27 additions and 17 deletions
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44
src/common/intl.cpp
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@ -188,21 +188,37 @@ private:
// all data is stored here, NULL if no data loaded
size_t8 *m_pData;
// amount of memory pointed to by m_pData.
size_t32 m_nSize;
// data description
size_t32 m_numStrings; // number of strings in this domain
wxMsgTableEntry *m_pOrigTable, // pointer to original strings
*m_pTransTable; // translated
const char *StringAtOfs(wxMsgTableEntry *pTable, size_t32 index) const
{ return (const char *)(m_pData + Swap(pTable[index].ofsString)); }
// swap the 2 halves of 32 bit integer if needed
size_t32 Swap(size_t32 ui) const
{
return m_bSwapped ? (ui << 24) | ((ui & 0xff00) << 8) |
((ui >> 8) & 0xff00) | (ui >> 24)
: ui;
}
const char *StringAtOfs(wxMsgTableEntry *pTable, size_t32 n) const
{
const wxMsgTableEntry * const ent = pTable + n;
// this check could fail for a corrupt message catalog
size_t32 ofsString = Swap(ent->ofsString);
if ( ofsString + Swap(ent->nLen) > m_nSize)
return NULL;
return (const char *)(m_pData + ofsString);
}
wxString GetCharset() const;
// utility functions
// big<->little endian
inline size_t32 Swap(size_t32 ui) const;
bool m_bSwapped; // wrong endianness?
bool m_bSwapped; // wrong endianness?
DECLARE_NO_COPY_CLASS(wxMsgCatalogFile)
};
@ -250,22 +266,15 @@ static wxArrayString s_searchPrefixes;
// wxMsgCatalogFile class
// ----------------------------------------------------------------------------
// swap the 2 halves of 32 bit integer if needed
size_t32 wxMsgCatalogFile::Swap(size_t32 ui) const
{
return m_bSwapped ? (ui << 24) | ((ui & 0xff00) << 8) |
((ui >> 8) & 0xff00) | (ui >> 24)
: ui;
}
wxMsgCatalogFile::wxMsgCatalogFile()
{
m_pData = NULL;
m_pData = NULL;
m_nSize = 0;
}
wxMsgCatalogFile::~wxMsgCatalogFile()
{
wxDELETEA(m_pData);
wxDELETEA(m_pData);
}
// return all directories to search for given prefix
@ -414,6 +423,7 @@ bool wxMsgCatalogFile::Load(const wxChar *szDirPrefix, const wxChar *szName0)
Swap(pHeader->ofsOrigTable));
m_pTransTable = (wxMsgTableEntry *)(m_pData +
Swap(pHeader->ofsTransTable));
m_nSize = nSize;
// everything is fine
return TRUE;