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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "printing/backend/printing_info_win.h"
#include <stdint.h>
#include "base/containers/heap_array.h"
#include "base/logging.h"
namespace printing {
namespace internal {
base::HeapArray<uint8_t> GetDriverInfo(HANDLE printer, int level) {
DWORD size = 0;
// ::GetPrinterDriver() will always fail on this check for the required size
// because the provided buffer is intentionally insufficient.
::GetPrinterDriver(printer, nullptr, level, nullptr, 0, &size);
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER || size == 0)
return {};
auto buffer = base::HeapArray<uint8_t>::Uninit(size);
if (!::GetPrinterDriver(printer, nullptr, level, buffer.data(), size,
&size)) {
return {};
}
return buffer;
}
base::HeapArray<uint8_t> GetPrinterInfo(HANDLE printer, int level) {
DWORD size = 0;
// ::GetPrinter() will always fail on this check for the required size
// because the provided buffer is intentionally insufficient.
::GetPrinter(printer, level, nullptr, 0, &size);
DWORD last_err = GetLastError();
if (last_err != ERROR_INSUFFICIENT_BUFFER || size == 0) {
LOG(WARNING) << "Failed to get size of PRINTER_INFO_" << level
<< ", error = " << last_err;
return {};
}
auto buffer = base::HeapArray<uint8_t>::Uninit(size);
if (!::GetPrinter(printer, level, buffer.data(), size, &size)) {
LOG(WARNING) << "Failed to get PRINTER_INFO_" << level
<< ", error = " << GetLastError();
return {};
}
return buffer;
}
} // namespace internal
} // namespace printing
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