test_loader.cpp

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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "testing/test_loader.h"
 
#include <stddef.h>
 
#include "core/fxcrt/check_op.h"
#include "core/fxcrt/fx_memcpy_wrappers.h"
#include "core/fxcrt/numerics/checked_math.h"
 
TestLoader::TestLoader(pdfium::span<const uint8_t> span) : m_Span(span) {}
 
// static
int TestLoader::GetBlock(void* param,
                         unsigned long pos,
                         unsigned char* pBuf,
                         unsigned long size) {
  TestLoader* pLoader = static_cast<TestLoader*>(param);
  pdfium::CheckedNumeric<size_t> end = pos;
  end += size;
  CHECK_LE(end.ValueOrDie(), pLoader->m_Span.size());
 
  FXSYS_memcpy(pBuf, &pLoader->m_Span[pos], size);
  return 1;
}