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Support/FileSystem: Add resize_file implementation. 

llvm-svn: 120819
This commit is contained in:
Michael J. Spencer 2010-12-03 17:54:07 +00:00
parent 409f556a2f
commit c20a0325f3
2 changed files with 29 additions and 0 deletions
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10
llvm/lib/Support/Unix/PathV2.inc
View File

@ -213,6 +213,16 @@ error_code rename(const Twine &from, const Twine &to) {
return make_error_code(errc::success);
}
error_code resize_file(const Twine &path, uint64_t size) {
SmallString<128> path_storage;
StringRef p = path.toNullTerminatedStringRef(path_storage);
if (::truncate(p.begin(), size) == -1)
return error_code(errno, system_category());
return make_error_code(errc::success);
}
error_code exists(const Twine &path, bool &result) {
SmallString<128> path_storage;
StringRef p = path.toNullTerminatedStringRef(path_storage);

19
llvm/lib/Support/Windows/PathV2.inc
View File

@ -18,7 +18,10 @@
#include "Windows.h"
#include <WinCrypt.h>
#include <fcntl.h>
#include <io.h>
#include <sys/stat.h>
#include <sys/types.h>
using namespace llvm;
@ -290,6 +293,22 @@ error_code rename(const Twine &from, const Twine &to) {
return make_error_code(errc::success);
}
error_code resize_file(const Twine &path, uint64_t size) {
SmallString<128> path_storage;
SmallVector<wchar_t, 128> path_utf16;
if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
path_utf16))
return ec;
int fd = ::_wopen(path_utf16.begin(), O_BINARY, S_IREAD | S_IWRITE);
if (fd == -1)
return error_code(errno, generic_category());
errno_t error = ::_chsize_s(fd, size);
::close(fd);
return error_code(error, generic_category());
}
error_code exists(const Twine &path, bool &result) {
SmallString<128> path_storage;
SmallVector<wchar_t, 128> path_utf16;