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57 lines
1020 B
C++
57 lines
1020 B
C++
// Aseprite TGA Library
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// Copyright (C) 2020-2021 Igara Studio S.A.
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//
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// This file is released under the terms of the MIT license.
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// Read LICENSE.txt for more information.
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#include "tga.h"
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#include <cassert>
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#include <limits>
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namespace tga {
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StdioFileInterface::StdioFileInterface(FILE* file)
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: m_file(file)
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, m_ok(true)
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{
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}
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bool StdioFileInterface::ok() const
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{
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return m_ok;
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}
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size_t StdioFileInterface::tell()
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{
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return ftell(m_file);
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}
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void StdioFileInterface::seek(size_t absPos)
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{
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// To detect surprises with the size_t -> long cast.
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assert(absPos <= std::numeric_limits<long>::max());
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fseek(m_file, (long)absPos, SEEK_SET);
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}
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uint8_t StdioFileInterface::read8()
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{
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int value = fgetc(m_file);
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if (value != EOF) {
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// We can safely cast to uint8_t as EOF is the only special
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// non-uint8 value than fgetc() should return.
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return (uint8_t)value;
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}
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m_ok = false;
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return 0;
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}
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void StdioFileInterface::write8(uint8_t value)
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{
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fputc(value, m_file);
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}
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} // namespace tga
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