139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
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BOOL
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pSetupGetKey (
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IN PINFCONTEXT pic,
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OUT PTSTR KeyBuf,
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OUT PBOOL KeyExistsOnLine
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)
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/*++
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Routine Description:
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pSetupGetKey copies the key for the specified INF context. If
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a key does not exist, then KeyBuf is reset.
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Arguments:
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pic - Specifies the INFCONTEXT that indicates which line to query
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KeyBuf - Receives the key, or is emptied of there is no key
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KeyExistsOnLine - Receives TRUE if the line has a key, or FALSE if not.
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Return Value:
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TRUE if successful, FALSE if not.
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--*/
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{
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UINT KeySize;
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PTSTR TempKeyBuf;
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PTSTR TempLineBuf;
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UINT LineSize;
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//
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// Get the key (if it exists)
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//
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*KeyExistsOnLine = FALSE;
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if (!SetupGetStringField (pic, 0, NULL, 0, &KeySize)) {
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//
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// Key does not exist
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//
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KeyBuf[0] = 0;
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return TRUE;
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}
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//
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// Use the caller's buffer if it is big enough
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//
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KeySize *= sizeof (TCHAR);
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if (KeySize >= MAX_KEY * sizeof (TCHAR)) {
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TempKeyBuf = (PTSTR) MemAlloc (g_hHeap, 0, KeySize);
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if (!TempKeyBuf) {
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LOG ((LOG_ERROR, "Setup Get Key: Could not allocate temp buffer"));
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return FALSE;
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}
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} else {
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TempKeyBuf = KeyBuf;
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}
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__try {
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if (!SetupGetStringField (pic, 0, TempKeyBuf, KeySize, NULL)) {
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DEBUGMSG ((DBG_WHOOPS, "pSetupGetKey: Could not read specified INF line"));
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return FALSE;
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}
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//
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// Get the line and compare against the key
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//
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if (SetupGetLineText (pic, NULL, NULL, NULL, NULL, 0, &LineSize)) {
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//
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// If the sizes are the same, we must actually get the text, then
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// compare the key against the line
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//
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LineSize *= sizeof (TCHAR);
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if (LineSize == KeySize) {
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TempLineBuf = (PTSTR) MemAlloc (g_hHeap, 0, LineSize);
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if (!TempLineBuf) {
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LOG ((LOG_ERROR, "Setup Get Key: Could not allocate line buffer"));
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return FALSE;
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}
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__try {
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if (!SetupGetLineText (pic, NULL, NULL, NULL, TempLineBuf, LineSize, NULL)) {
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DEBUGMSG ((DBG_WHOOPS, "pSetupGetKey: Could not get line text"));
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return FALSE;
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}
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if (!StringCompare (TempLineBuf, TempKeyBuf)) {
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//
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// There is no key for this line
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//
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TempKeyBuf[0] = 0;
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} else {
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//
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// There is a key for this line
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//
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*KeyExistsOnLine = TRUE;
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}
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}
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__finally {
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MemFree (g_hHeap, 0, TempLineBuf);
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}
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} else {
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//
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// Since the sizes are different, we know there is a key
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//
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*KeyExistsOnLine = TRUE;
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}
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}
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//
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// If we were not using the caller's buffer, copy as much of the
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// key as will fit
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//
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if (TempKeyBuf != KeyBuf) {
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_tcssafecpy (KeyBuf, TempKeyBuf, MAX_KEY);
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}
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}
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__finally {
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if (TempKeyBuf != KeyBuf) {
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MemFree (g_hHeap, 0, TempKeyBuf);
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}
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}
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return TRUE;
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}
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