diff options
Diffstat (limited to 'core/fxcodec/codec/cfx_codec_memory.cpp')
-rw-r--r-- | core/fxcodec/codec/cfx_codec_memory.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/core/fxcodec/codec/cfx_codec_memory.cpp b/core/fxcodec/codec/cfx_codec_memory.cpp new file mode 100644 index 0000000000..8eac02c9ee --- /dev/null +++ b/core/fxcodec/codec/cfx_codec_memory.cpp @@ -0,0 +1,30 @@ +// Copyright 2018 PDFium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "core/fxcodec/codec/cfx_codec_memory.h" + +#include <algorithm> + +CFX_CodecMemory::CFX_CodecMemory(uint8_t* buffer, size_t size) + : buffer_(buffer), size_(size) {} + +CFX_CodecMemory::~CFX_CodecMemory() = default; + +bool CFX_CodecMemory::Seek(size_t pos) { + if (pos > size_) + return false; + + pos_ = pos; + return true; +} + +size_t CFX_CodecMemory::ReadBlock(void* buffer, size_t size) { + if (!buffer || !size || IsEOF()) + return 0; + + size_t bytes_to_read = std::min(size, size_ - pos_); + memcpy(buffer, &buffer_[pos_], bytes_to_read); + pos_ += bytes_to_read; + return bytes_to_read; +} |