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Import LLVM openFileForRead and openFileForWrite.

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This commit is contained in:
Peter Johnson
2017-08-13 00:37:14 -07:00
parent 7d9e6b7e22
commit 1c1fbf14cf
7 changed files with 380 additions and 134 deletions
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103
src/main/native/cpp/llvm/raw_ostream.cpp
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@@ -74,32 +74,6 @@ static inline bool RunningWindows8OrGreater() {
Mask) != FALSE;
}
static std::error_code UTF8ToUTF16(llvm::StringRef utf8,
llvm::SmallVectorImpl<wchar_t> &utf16) {
if (!utf8.empty()) {
int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
utf8.size(), utf16.begin(), 0);
if (len == 0)
return llvm::mapWindowsError(::GetLastError());
utf16.reserve(len + 1);
utf16.set_size(len);
len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
utf8.size(), utf16.begin(), utf16.size());
if (len == 0)
return llvm::mapWindowsError(::GetLastError());
}
// Make utf16 null terminated.
utf16.push_back(0);
utf16.pop_back();
return std::error_code();
}
#endif
using namespace llvm;
@@ -548,82 +522,9 @@ static int getFD(StringRef Filename, std::error_code &EC,
int FD;
//EC = sys::fs::openFileForWrite(Filename, FD, Flags);
//if (EC)
// return -1;
#if defined(_WIN32)
// Verify that we don't have both "append" and "excl".
assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
"Cannot specify both 'excl' and 'append' file creation flags!");
SmallVector<wchar_t, 128> PathUTF16;
EC = UTF8ToUTF16(Filename, PathUTF16);
if (EC) return -1;
DWORD CreationDisposition;
if (Flags & sys::fs::F_Excl)
CreationDisposition = CREATE_NEW;
else if (Flags & sys::fs::F_Append)
CreationDisposition = OPEN_ALWAYS;
else
CreationDisposition = CREATE_ALWAYS;
DWORD Access = GENERIC_WRITE;
if (Flags & sys::fs::F_RW)
Access |= GENERIC_READ;
HANDLE H = ::CreateFileW(PathUTF16.begin(), Access,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
if (H == INVALID_HANDLE_VALUE) {
DWORD LastError = ::GetLastError();
EC = mapWindowsError(LastError);
EC = sys::fs::openFileForWrite(Filename, FD, Flags);
if (EC)
return -1;
}
int OpenFlags = 0;
if (Flags & sys::fs::F_Append)
OpenFlags |= _O_APPEND;
if (Flags & sys::fs::F_Text)
OpenFlags |= _O_TEXT;
FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
if (FD == -1) {
::CloseHandle(H);
EC = mapWindowsError(ERROR_INVALID_HANDLE);
return -1;
}
#else
// Verify that we don't have both "append" and "excl".
assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
"Cannot specify both 'excl' and 'append' file creation flags!");
int OpenFlags = O_CREAT;
if (Flags & sys::fs::F_RW)
OpenFlags |= O_RDWR;
else
OpenFlags |= O_WRONLY;
if (Flags & sys::fs::F_Append)
OpenFlags |= O_APPEND;
else
OpenFlags |= O_TRUNC;
if (Flags & sys::fs::F_Excl)
OpenFlags |= O_EXCL;
SmallString<128> Storage{Filename};
while ((FD = open(Storage.c_str(), OpenFlags, 0666)) < 0) {
if (errno != EINTR) {
EC = std::error_code(errno, std::generic_category());
return -1;
}
}
#endif
EC = std::error_code();
return FD;