mirror of https://github.com/bsnes-emu/bsnes.git
76 lines
1.7 KiB
C++
76 lines
1.7 KiB
C++
#pragma once
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#include <nall/range.hpp>
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#include <nall/shared-pointer.hpp>
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namespace nall { namespace vfs {
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struct file {
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enum class mode : uint { read, write, modify, create };
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enum class index : uint { absolute, relative };
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virtual ~file() = default;
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virtual auto size() const -> uintmax = 0;
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virtual auto offset() const -> uintmax = 0;
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virtual auto seek(intmax offset, index = index::absolute) -> void = 0;
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virtual auto read() -> uint8_t = 0;
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virtual auto write(uint8_t data) -> void = 0;
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virtual auto flush() -> void {}
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auto end() const -> bool {
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return offset() >= size();
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}
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auto read(void* vdata, uintmax bytes) -> void {
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auto data = (uint8_t*)vdata;
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while(bytes--) *data++ = read();
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}
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auto readl(uint bytes) -> uintmax {
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uintmax data = 0;
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for(auto n : range(bytes)) data |= (uintmax)read() << n * 8;
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return data;
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}
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auto readm(uint bytes) -> uintmax {
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uintmax data = 0;
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for(auto n : range(bytes)) data = data << 8 | read();
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return data;
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}
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auto reads() -> string {
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string s;
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s.resize(size());
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read(s.get<uint8_t>(), s.size());
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return s;
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}
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auto write(const void* vdata, uintmax bytes) -> void {
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auto data = (const uint8_t*)vdata;
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while(bytes--) write(*data++);
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}
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auto writel(uintmax data, uint bytes) -> void {
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for(auto n : range(bytes)) write(data), data >>= 8;
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}
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auto writem(uintmax data, uint bytes) -> void {
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for(auto n : rrange(bytes)) write(data >> n * 8);
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}
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auto writes(const string& s) -> void {
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write(s.data<uint8_t>(), s.size());
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}
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};
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}}
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namespace nall { namespace vfs { namespace shared {
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using file = shared_pointer<vfs::file>;
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}}}
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#include <nall/vfs/fs/file.hpp>
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#include <nall/vfs/memory/file.hpp>
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