6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 20:32:21 +00:00
Code Issues Projects Releases Wiki Activity

Implement the new CopyFile function

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13945 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-06-02 00:52:22 +00:00
parent 2a7f15e50b
commit 5bfac5d2ed
1 changed files with 35 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
lib/Support/FileUtilities.cpp
View File

@ -109,6 +109,41 @@ bool llvm::DiffFiles(const std::string &FileA, const std::string &FileB,
}
/// CopyFile - Copy the specified source file to the specified destination,
/// overwriting destination if it exists. This returns true on failure.
///
bool llvm::CopyFile(const std::string &Dest, const std::string &Src) {
FDHandle InFD(open(Src.c_str(), O_RDONLY));
if (InFD == -1) return true;
FileRemover FR(Dest);
FDHandle OutFD(open(Dest.c_str(), O_WRONLY|O_CREAT, 0666));
if (OutFD == -1) return true;
char Buffer[16*1024];
while (ssize_t Amt = read(InFD, Buffer, 16*1024)) {
if (Amt == -1) {
if (errno != EINTR) return true; // Error reading the file.
} else {
char *BufPtr = Buffer;
while (Amt) {
ssize_t AmtWritten = write(OutFD, BufPtr, Amt);
if (AmtWritten == -1) {
if (errno != EINTR) return true; // Error writing the file.
} else {
Amt -= AmtWritten;
BufPtr += AmtWritten;
}
}
}
}
FR.releaseFile(); // Success!
return false;
}
/// MoveFileOverIfUpdated - If the file specified by New is different than Old,
/// or if Old does not exist, move the New file over the Old file. Otherwise,
/// remove the New file.