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https://github.com/jakcron/nstool
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[fnd] Implement Windows 64bit size_t support in SimpleFile.
This commit is contained in:
jakcron
parent
57d03b6076
commit
93509fac5a
2 changed files with 239 additions and 6 deletions
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@ -1,7 +1,11 @@
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#pragma once
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#include <fnd/IFile.h>
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#include <string>
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#ifdef _WIN32
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#include <Windows.h>
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#else
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#include <cstdio>
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#endif
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namespace fnd
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{
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@ -34,9 +38,16 @@ namespace fnd
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bool mOpen;
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OpenMode mMode;
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FILE* mFp;
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const char* getOpenModeStr(OpenMode mMode);
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#ifdef _WIN32
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HANDLE mFileHandle;
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DWORD getOpenModeFlag(OpenMode mode) const;
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DWORD getShareModeFlag(OpenMode mode) const;
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DWORD getCreationModeFlag(OpenMode mode) const;
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#else
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FILE* mFp;
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const char* getOpenModeStr(OpenMode mode);
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#endif
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};
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}
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@ -1,11 +1,16 @@
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#include <fnd/SimpleFile.h>
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#include <fnd/StringConv.h>
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using namespace fnd;
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SimpleFile::SimpleFile() :
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mOpen(false),
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mMode(Read),
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#ifdef _WIN32
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mFileHandle()
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#else
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mFp(nullptr)
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#endif
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{
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}
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@ -16,6 +21,29 @@ SimpleFile::~SimpleFile()
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void SimpleFile::open(const std::string& path, OpenMode mode)
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{
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#ifdef _WIN32
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// convert string to unicode
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std::u16string unicodePath = fnd::StringConv::ConvertChar8ToChar16(path);
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// save mode
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mMode = mode;
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// open file
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mFileHandle = CreateFileW((LPCWSTR)unicodePath.c_str(),
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getOpenModeFlag(mMode),
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getShareModeFlag(mMode),
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0,
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getCreationModeFlag(mMode),
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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// check file handle
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if (mFileHandle == INVALID_HANDLE_VALUE)
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{
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throw fnd::Exception(kModuleName, "Failed to open file.");
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}
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#else
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//close();
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mMode = mode;
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//printf("fopen(%s,%s);\n", path.c_str(), getOpenModeStr(mMode));
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@ -23,46 +51,140 @@ void SimpleFile::open(const std::string& path, OpenMode mode)
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if (mFp == nullptr)
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throw fnd::Exception(kModuleName, "Failed to open file.");
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mOpen = true;
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#endif
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seek(0);
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}
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bool SimpleFile::isOpen() const
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{
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return mOpen == true && mFp != nullptr;
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return mOpen == true;
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}
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void SimpleFile::close()
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{
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if (isOpen())
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{
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#ifdef _WIN32
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CloseHandle(mFileHandle);
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#else
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fclose(mFp);
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mFp = nullptr;
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#endif
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}
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mFp = nullptr;
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mOpen = false;
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}
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size_t SimpleFile::size()
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{
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size_t fsize = 0;
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#ifdef _WIN32
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if (mMode != Create)
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{
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LARGE_INTEGER win_fsize;
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if (GetFileSizeEx(mFileHandle, &win_fsize) == false)
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{
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throw fnd::Exception(kModuleName, "Failed to check filesize");
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}
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fsize = win_fsize.QuadPart;
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}
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else
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{
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fsize = 0;
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}
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#else
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size_t cur_pos = pos();
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fseek(mFp, 0, SEEK_END);
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size_t fsize = pos();
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fsize = pos();
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seek(cur_pos);
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#endif
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return fsize;
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}
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void SimpleFile::seek(size_t offset)
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{
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#ifdef _WIN32
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LARGE_INTEGER win_pos, out;
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win_pos.QuadPart = offset;
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if (SetFilePointerEx(
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mFileHandle,
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win_pos,
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&out,
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FILE_BEGIN
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) == false || out.QuadPart != win_pos.QuadPart)
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{
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throw fnd::Exception(kModuleName, "Failed to change file offset");
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}
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#else
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fseek(mFp, offset, SEEK_SET);
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#endif
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}
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size_t SimpleFile::pos()
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{
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#ifdef _WIN32
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LARGE_INTEGER win_pos, out;
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win_pos.QuadPart = 0;
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if (SetFilePointerEx(
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mFileHandle,
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win_pos,
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&out,
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FILE_CURRENT
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) == false)
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{
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throw fnd::Exception(kModuleName, "Failed to check file offset");
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}
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return out.QuadPart;
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#else
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return ftell(mFp);
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#endif
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}
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void SimpleFile::read(byte_t* out, size_t len)
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{
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#ifdef _WIN32
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LARGE_INTEGER win_len;
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win_len.QuadPart = len;
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static const DWORD kDwordHalf = (MAXDWORD / (DWORD)2) + 1; // 0x80000000
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static const size_t kDwordFull = (size_t)kDwordHalf * (size_t)2; // 0x100000000
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// if the size is greater than a DWORD, read it in parts,
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for (LONG i = 0; i < win_len.HighPart; i++)
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{
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// since kDwordFull isn't a valid DWORD value, read in two parts
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ReadFile(
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mFileHandle,
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out + i * kDwordFull,
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kDwordHalf,
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NULL,
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NULL
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);
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ReadFile(
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mFileHandle,
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out + i * kDwordFull + kDwordHalf,
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kDwordHalf,
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NULL,
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NULL
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);
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}
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// read remainding low part
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if (win_len.LowPart > 0)
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{
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ReadFile(
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mFileHandle,
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out + win_len.HighPart * kDwordFull,
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win_len.LowPart,
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NULL,
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NULL
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);
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}
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#else
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fread(out, len, 1, mFp);
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#endif
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}
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void SimpleFile::read(byte_t* out, size_t offset, size_t len)
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@ -73,7 +195,47 @@ void SimpleFile::read(byte_t* out, size_t offset, size_t len)
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void SimpleFile::write(const byte_t* out, size_t len)
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{
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#ifdef _WIN32
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LARGE_INTEGER win_len;
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win_len.QuadPart = len;
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static const DWORD kDwordHalf = ((DWORD)MAXDWORD / (DWORD)2) + 1; // 0x80000000
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static const size_t kDwordFull = (size_t)kDwordHalf * (size_t)2; // 0x100000000
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// if the size is greater than a DWORD, read it in parts,
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for (LONG i = 0; i < win_len.HighPart; i++)
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{
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// since kDwordFull isn't a valid DWORD value, read in two parts
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WriteFile(
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mFileHandle,
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out + i * kDwordFull,
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kDwordHalf,
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NULL,
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NULL
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);
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WriteFile(
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mFileHandle,
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out + i * kDwordFull + kDwordHalf,
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kDwordHalf,
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NULL,
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NULL
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);
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}
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// read remainding low part
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if (win_len.LowPart > 0)
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{
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WriteFile(
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mFileHandle,
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out + win_len.HighPart * kDwordFull,
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win_len.LowPart,
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NULL,
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NULL
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);
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}
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#else
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fwrite(out, len, 1, mFp);
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#endif
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}
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void SimpleFile::write(const byte_t* out, size_t offset, size_t len)
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@ -82,6 +244,65 @@ void SimpleFile::write(const byte_t* out, size_t offset, size_t len)
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write(out, len);
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}
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#ifdef _WIN32
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DWORD SimpleFile::getOpenModeFlag(OpenMode mode) const
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{
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DWORD flag = 0;
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switch (mode)
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{
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case (Read):
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flag = GENERIC_READ;
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break;
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case (Edit):
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flag = GENERIC_READ | GENERIC_WRITE;
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break;
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case (Create):
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flag = GENERIC_WRITE;
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break;
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default:
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throw fnd::Exception(kModuleName, "Unknown open mode");
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}
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return flag;
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}
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DWORD fnd::SimpleFile::getShareModeFlag(OpenMode mode) const
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{
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DWORD flag = 0;
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switch (mode)
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{
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case (Read):
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flag = FILE_SHARE_READ;
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break;
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case (Edit):
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flag = FILE_SHARE_READ;
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break;
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case (Create):
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flag = 0;
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break;
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default:
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throw fnd::Exception(kModuleName, "Unknown open mode");
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}
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return flag;
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}
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DWORD fnd::SimpleFile::getCreationModeFlag(OpenMode mode) const
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{
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DWORD flag = 0;
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switch (mode)
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{
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case (Read):
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flag = OPEN_EXISTING;
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break;
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case (Edit):
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flag = OPEN_EXISTING;
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break;
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case (Create):
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flag = CREATE_ALWAYS;
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break;
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default:
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throw fnd::Exception(kModuleName, "Unknown open mode");
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}
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return flag;
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}
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#else
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const char* SimpleFile::getOpenModeStr(OpenMode mode)
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{
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const char* str = "";
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@ -101,3 +322,4 @@ const char* SimpleFile::getOpenModeStr(OpenMode mode)
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}
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return str;
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}
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#endif
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