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elimiante some syscalls

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29442 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-08-01 17:51:09 +00:00
parent 3336aa056f
commit c7c453a845
2 changed files with 20 additions and 23 deletions
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27
lib/System/Unix/Path.inc
View File

@ -241,7 +241,7 @@ Path::isFile() const {
if (!exists())
return false;
struct stat buf;
if (0 != stat(path.c_str(), &buf)) {
if (stat(path.c_str(), &buf) != 0) {
ThrowErrno(path + ": can't determine type of path object: ");
}
return S_ISREG(buf.st_mode);
@ -286,12 +286,10 @@ Path::getBasename() const {
}
bool Path::hasMagicNumber(const std::string &Magic) const {
if (!isFile())
return false;
size_t len = Magic.size();
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
int fd = ::open(path.c_str(),O_RDONLY);
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
size_t read_len = ::read(fd, buf, len);
@ -303,11 +301,9 @@ bool Path::hasMagicNumber(const std::string &Magic) const {
}
bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
if (!isFile())
return false;
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
int fd = ::open(path.c_str(),O_RDONLY);
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
ssize_t bytes_read = ::read(fd, buf, len);
@ -322,11 +318,9 @@ bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
bool
Path::isBytecodeFile() const {
if (!isFile())
return false;
char buffer[ 4];
char buffer[4];
buffer[0] = 0;
int fd = ::open(path.c_str(),O_RDONLY);
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
ssize_t bytes_read = ::read(fd, buffer, 4);
@ -335,7 +329,7 @@ Path::isBytecodeFile() const {
return false;
return (buffer[0] == 'l' && buffer[1] == 'l' && buffer[2] == 'v' &&
(buffer[3] == 'c' || buffer[3] == 'm'));
(buffer[3] == 'c' || buffer[3] == 'm'));
}
bool
@ -605,14 +599,17 @@ Path::createTemporaryFileOnDisk(bool reuse_current) {
bool
Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
// Make sure we're dealing with a directory.
if (isFile()) {
FileStatus Status;
if (getFileStatus(Status, ErrStr))
return true;
if (Status.isFile) {
if (unlink(path.c_str()) != 0)
return GetErrno(path + ": can't destroy file", ErrStr);
return false;
}
if (!isDirectory()) {
if (!Status.isDir) {
if (ErrStr) *ErrStr = "not a file or directory";
return true;
}

16
lib/System/Win32/Path.inc
View File

@ -281,8 +281,6 @@ bool Path::hasMagicNumber(const std::string &Magic) const {
bool
Path::isBytecodeFile() const {
if (!isFile())
return false;
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
@ -574,12 +572,16 @@ Path::createFileOnDisk() {
bool
Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
if (isFile()) {
FileStatus Status;
if (getFileStatus(Status, ErrStr))
return true;
if (Status.isFile) {
DWORD attr = GetFileAttributes(path.c_str());
// If it doesn't exist, we're done.
if (attr == INVALID_FILE_ATTRIBUTES)
return false;
return true;
// Read-only files cannot be deleted on Windows. Must remove the read-only
// attribute first.
@ -590,8 +592,8 @@ Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
if (!DeleteFile(path.c_str()))
ThrowError(path + ": Can't destroy file: ");
return true;
} else if (isDirectory()) {
return false;
} else if (Status.isDir) {
// If it doesn't exist, we're done.
if (!exists())
return false;
@ -657,8 +659,6 @@ Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
}
bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
if (!isFile())
return false;
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);