/// Remove '.' path components from the given absolute path.
/// \return \c true if any changes were made.
// FIXME: Move this to llvm::sys::path.
bool FileManager::removeDotPaths(SmallVectorImpl<char> &Path) {
using namespace llvm::sys;
SmallVector<StringRef, 16> ComponentStack;
StringRef P(Path.data(), Path.size());
// Skip the root path, then look for traversal in the components.
StringRef Rel = path::relative_path(P);
bool AnyDots = false;
for (StringRef C : llvm::make_range(path::begin(Rel), path::end(Rel))) {
if (C == ".") {
AnyDots = true;
continue;
}
ComponentStack.push_back(C);
}
if (!AnyDots)
return false;
SmallString<256> Buffer = path::root_path(P);
for (StringRef C : ComponentStack)
path::append(Buffer, C);
Path.swap(Buffer);
return true;
}
/// Remove traversal (ie, . or ..) from the given absolute path.
static void removePathTraversal(SmallVectorImpl<char> &Path) {
using namespace llvm::sys;
SmallVector<StringRef, 16> ComponentStack;
StringRef P(Path.data(), Path.size());
// Skip the root path, then look for traversal in the components.
StringRef Rel = path::relative_path(P);
for (StringRef C : llvm::make_range(path::begin(Rel), path::end(Rel))) {
if (C == ".")
continue;
if (C == "..") {
assert(ComponentStack.size() && "Path traverses out of parent");
ComponentStack.pop_back();
} else
ComponentStack.push_back(C);
}
// The stack is now the path without any directory traversal.
SmallString<256> Buffer = path::root_path(P);
for (StringRef C : ComponentStack)
path::append(Buffer, C);
// Put the result in Path.
Path.swap(Buffer);
}
/// Remove '.' and '..' path components from the given absolute path.
/// \return \c true if any changes were made.
// FIXME: Move this to llvm::sys::path.
bool FileManager::removeDotPaths(SmallVectorImpl<char> &Path, bool RemoveDotDot) {
using namespace llvm::sys;
SmallVector<StringRef, 16> ComponentStack;
StringRef P(Path.data(), Path.size());
// Skip the root path, then look for traversal in the components.
StringRef Rel = path::relative_path(P);
for (StringRef C : llvm::make_range(path::begin(Rel), path::end(Rel))) {
if (C == ".")
continue;
if (RemoveDotDot) {
if (C == "..") {
if (!ComponentStack.empty())
ComponentStack.pop_back();
continue;
}
}
ComponentStack.push_back(C);
}
SmallString<256> Buffer = path::root_path(P);
for (StringRef C : ComponentStack)
path::append(Buffer, C);
bool Changed = (Path != Buffer);
Path.swap(Buffer);
return Changed;
}
bool remove_dots(SmallVectorImpl<char> &path, bool remove_dot_dot,
Style style) {
StringRef p(path.data(), path.size());
SmallString<256> result = remove_dots(p, remove_dot_dot, style);
if (result == path)
return false;
path.swap(result);
return true;
}
void replace_path_prefix(SmallVectorImpl<char> &Path,
const StringRef &OldPrefix, const StringRef &NewPrefix,
Style style) {
if (OldPrefix.empty() && NewPrefix.empty())
return;
StringRef OrigPath(Path.begin(), Path.size());
if (!OrigPath.startswith(OldPrefix))
return;
// If prefixes have the same size we can simply copy the new one over.
if (OldPrefix.size() == NewPrefix.size()) {
std::copy(NewPrefix.begin(), NewPrefix.end(), Path.begin());
return;
}
StringRef RelPath = OrigPath.substr(OldPrefix.size());
SmallString<256> NewPath;
path::append(NewPath, style, NewPrefix);
path::append(NewPath, style, RelPath);
Path.swap(NewPath);
}
