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fix ANI loading; check for errors when calling Read()

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58101 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Francesco Montorsi
2009-01-14 17:26:19 +00:00
parent e5cf63c9a8
commit 604898dc4a
1 changed files with 18 additions and 7 deletions
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25
src/common/anidecod.cpp
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@@ -236,10 +236,12 @@ bool wxANIDecoder::Load( wxInputStream& stream )
m_info.Clear(); m_info.Clear();
// we have a riff file: // we have a riff file:
while ( stream.IsOk() ) while ( !stream.Eof() )
{ {
// we always have a data size: // we always have a data size:
stream.Read(&datalen, 4); if (!stream.Read(&datalen, 4))
return false;
datalen = wxINT32_SWAP_ON_BE(datalen); datalen = wxINT32_SWAP_ON_BE(datalen);
//data should be padded to make even number of bytes //data should be padded to make even number of bytes
@@ -248,7 +250,8 @@ bool wxANIDecoder::Load( wxInputStream& stream )
// now either data or a FCC: // now either data or a FCC:
if ( (FCC1 == riff32) || (FCC1 == list32) ) if ( (FCC1 == riff32) || (FCC1 == list32) )
{ {
stream.Read(&FCC2, 4); if (!stream.Read(&FCC2, 4))
return false;
} }
else if ( FCC1 == anih32 ) else if ( FCC1 == anih32 )
{ {
@@ -259,7 +262,8 @@ bool wxANIDecoder::Load( wxInputStream& stream )
return false; // already parsed an ani header? return false; // already parsed an ani header?
struct wxANIHeader header; struct wxANIHeader header;
stream.Read(&header, sizeof(wxANIHeader)); if (!stream.Read(&header, sizeof(wxANIHeader)))
return false;
header.AdjustEndianness(); header.AdjustEndianness();
// we should have a global frame size // we should have a global frame size
@@ -284,7 +288,8 @@ bool wxANIDecoder::Load( wxInputStream& stream )
wxASSERT(m_info.GetCount() == m_nFrames); wxASSERT(m_info.GetCount() == m_nFrames);
for (unsigned int i=0; i<m_nFrames; i++) for (unsigned int i=0; i<m_nFrames; i++)
{ {
stream.Read(&FCC2, 4); if (!stream.Read(&FCC2, 4))
return false;
m_info[i].m_delay = wxINT32_SWAP_ON_BE(FCC2) * 1000 / 60; m_info[i].m_delay = wxINT32_SWAP_ON_BE(FCC2) * 1000 / 60;
} }
} }
@@ -297,7 +302,8 @@ bool wxANIDecoder::Load( wxInputStream& stream )
wxASSERT(m_info.GetCount() == m_nFrames); wxASSERT(m_info.GetCount() == m_nFrames);
for (unsigned int i=0; i<m_nFrames; i++) for (unsigned int i=0; i<m_nFrames; i++)
{ {
stream.Read(&FCC2, 4); if (!stream.Read(&FCC2, 4))
return false;
m_info[i].m_imageIndex = wxINT32_SWAP_ON_BE(FCC2); m_info[i].m_imageIndex = wxINT32_SWAP_ON_BE(FCC2);
} }
} }
@@ -318,8 +324,13 @@ bool wxANIDecoder::Load( wxInputStream& stream )
} }
// try to read next data chunk: // try to read next data chunk:
if ( !stream.Read(&FCC1, 4) ) if ( !stream.Read(&FCC1, 4) && !stream.Eof())
{
// we didn't reach the EOF! An other kind of error has occurred...
return false; return false;
}
//else: proceed with the parsing of the next header block or
// exiting this loop (if stream.Eof() == true)
} }
if (m_nFrames==0) if (m_nFrames==0)