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Check opened enhmetafile for magic values.

This commit is contained in:
Marcus Meissner 1999-01-23 12:20:41 +00:00 committed by Alexandre Julliard
parent 689b9f8993
commit 16af9baf41
1 changed files with 31 additions and 4 deletions
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35
objects/enhmetafile.c
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@ -31,15 +31,42 @@ HENHMETAFILE32 WINAPI GetEnhMetaFile32A(
FIXME(metafile,"could not open %s\n",lpszMetaFile);
return 0;
}
if (!ReadFile(hf, &h, sizeof(ENHMETAHEADER), &read, NULL))
if (!ReadFile(hf, &h, sizeof(ENHMETAHEADER), &read, NULL)) {
FIXME(metafile,"%s can't be read.\n",lpszMetaFile);
CloseHandle(hf);
return 0;
if (read!=sizeof(ENHMETAHEADER)) return 0;
}
if (read!=sizeof(ENHMETAHEADER)) {
FIXME(metafile,"%s is not long enough.\n",lpszMetaFile);
CloseHandle(hf);
return 0;
}
if (h.iType!=1) {
FIXME(metafile,"%s has invalid emf header (type 0x%08lx).\n",lpszMetaFile,h.iType);
CloseHandle(hf);
return 0;
}
if (memcmp(&(h.dSignature)," EMF",4)) {
FIXME(metafile,"%s has invalid EMF header (dSignature 0x%08lx).\n",lpszMetaFile,h.dSignature);
CloseHandle(hf);
return 0;
}
SetFilePointer(hf, 0, NULL, FILE_BEGIN);
/* hmf = CreateFileMapping32A( hf, NULL, NULL, NULL, NULL, "temp"); */
hmf = GlobalAlloc32(GPTR, h.nBytes);
p = GlobalLock32(hmf);
if (!ReadFile(hf, p, h.nBytes, &read, NULL)) return 0;
assert(read==h.nBytes);
if (!ReadFile(hf, p, h.nBytes, &read, NULL)) {
FIXME(metafile,"%s could not be read.\n",lpszMetaFile);
GlobalFree32(hmf);
CloseHandle(hf);
return 0;
}
if (read!=h.nBytes) {
FIXME(metafile,"%s is not long enough (%ld expected, %ld got).\n",lpszMetaFile,h.nBytes,read);
GlobalFree32(hmf);
CloseHandle(hf);
return 0;
}
GlobalUnlock32(hmf);
return hmf;
}