llvm-project/lldb/source/Target/PathMappingList.cpp

291 lines
8.5 KiB
C++

//===-- PathMappingList.cpp -------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// C Includes
// C++ Includes
#include <climits>
#include <cstring>
// Other libraries and framework includes
// Project includes
#include "lldb/Host/PosixApi.h"
#include "lldb/Target/PathMappingList.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// PathMappingList constructor
//----------------------------------------------------------------------
PathMappingList::PathMappingList()
: m_pairs(), m_callback(nullptr), m_callback_baton(nullptr), m_mod_id(0) {}
PathMappingList::PathMappingList(ChangedCallback callback, void *callback_baton)
: m_pairs(), m_callback(callback), m_callback_baton(callback_baton),
m_mod_id(0) {}
PathMappingList::PathMappingList(const PathMappingList &rhs)
: m_pairs(rhs.m_pairs), m_callback(nullptr), m_callback_baton(nullptr),
m_mod_id(0) {}
const PathMappingList &PathMappingList::operator=(const PathMappingList &rhs) {
if (this != &rhs) {
m_pairs = rhs.m_pairs;
m_callback = nullptr;
m_callback_baton = nullptr;
m_mod_id = rhs.m_mod_id;
}
return *this;
}
PathMappingList::~PathMappingList() = default;
void PathMappingList::Append(const ConstString &path,
const ConstString &replacement, bool notify) {
++m_mod_id;
m_pairs.push_back(pair(path, replacement));
if (notify && m_callback)
m_callback(*this, m_callback_baton);
}
void PathMappingList::Append(const PathMappingList &rhs, bool notify) {
++m_mod_id;
if (!rhs.m_pairs.empty()) {
const_iterator pos, end = rhs.m_pairs.end();
for (pos = rhs.m_pairs.begin(); pos != end; ++pos)
m_pairs.push_back(*pos);
if (notify && m_callback)
m_callback(*this, m_callback_baton);
}
}
void PathMappingList::Insert(const ConstString &path,
const ConstString &replacement, uint32_t index,
bool notify) {
++m_mod_id;
iterator insert_iter;
if (index >= m_pairs.size())
insert_iter = m_pairs.end();
else
insert_iter = m_pairs.begin() + index;
m_pairs.insert(insert_iter, pair(path, replacement));
if (notify && m_callback)
m_callback(*this, m_callback_baton);
}
bool PathMappingList::Replace(const ConstString &path,
const ConstString &replacement, uint32_t index,
bool notify) {
if (index >= m_pairs.size())
return false;
++m_mod_id;
m_pairs[index] = pair(path, replacement);
if (notify && m_callback)
m_callback(*this, m_callback_baton);
return true;
}
bool PathMappingList::Remove(size_t index, bool notify) {
if (index >= m_pairs.size())
return false;
++m_mod_id;
iterator iter = m_pairs.begin() + index;
m_pairs.erase(iter);
if (notify && m_callback)
m_callback(*this, m_callback_baton);
return true;
}
// For clients which do not need the pair index dumped, pass a pair_index >= 0
// to only dump the indicated pair.
void PathMappingList::Dump(Stream *s, int pair_index) {
unsigned int numPairs = m_pairs.size();
if (pair_index < 0) {
unsigned int index;
for (index = 0; index < numPairs; ++index)
s->Printf("[%d] \"%s\" -> \"%s\"\n", index,
m_pairs[index].first.GetCString(),
m_pairs[index].second.GetCString());
} else {
if (static_cast<unsigned int>(pair_index) < numPairs)
s->Printf("%s -> %s", m_pairs[pair_index].first.GetCString(),
m_pairs[pair_index].second.GetCString());
}
}
void PathMappingList::Clear(bool notify) {
if (!m_pairs.empty())
++m_mod_id;
m_pairs.clear();
if (notify && m_callback)
m_callback(*this, m_callback_baton);
}
bool PathMappingList::RemapPath(const ConstString &path,
ConstString &new_path) const {
const char *path_cstr = path.GetCString();
// CLEANUP: Convert this function to use StringRefs internally instead
// of raw c-strings.
if (!path_cstr)
return false;
const_iterator pos, end = m_pairs.end();
for (pos = m_pairs.begin(); pos != end; ++pos) {
const size_t prefixLen = pos->first.GetLength();
if (::strncmp(pos->first.GetCString(), path_cstr, prefixLen) == 0) {
std::string new_path_str(pos->second.GetCString());
new_path_str.append(path.GetCString() + prefixLen);
new_path.SetCString(new_path_str.c_str());
return true;
}
}
return false;
}
bool PathMappingList::RemapPath(llvm::StringRef path,
std::string &new_path) const {
if (m_pairs.empty() || path.empty())
return false;
const_iterator pos, end = m_pairs.end();
for (pos = m_pairs.begin(); pos != end; ++pos) {
if (!path.consume_front(pos->first.GetStringRef()))
continue;
new_path = pos->second.GetStringRef();
new_path.append(path);
return true;
}
return false;
}
bool PathMappingList::ReverseRemapPath(const ConstString &path,
ConstString &new_path) const {
const char *path_cstr = path.GetCString();
if (!path_cstr)
return false;
for (const auto &it : m_pairs) {
// FIXME: This should be using FileSpec API's to do the path appending.
const size_t prefixLen = it.second.GetLength();
if (::strncmp(it.second.GetCString(), path_cstr, prefixLen) == 0) {
std::string new_path_str(it.first.GetCString());
new_path_str.append(path.GetCString() + prefixLen);
new_path.SetCString(new_path_str.c_str());
return true;
}
}
return false;
}
bool PathMappingList::FindFile(const FileSpec &orig_spec,
FileSpec &new_spec) const {
if (!m_pairs.empty()) {
char orig_path[PATH_MAX];
const size_t orig_path_len =
orig_spec.GetPath(orig_path, sizeof(orig_path));
if (orig_path_len > 0) {
const_iterator pos, end = m_pairs.end();
for (pos = m_pairs.begin(); pos != end; ++pos) {
const size_t prefix_len = pos->first.GetLength();
if (orig_path_len >= prefix_len) {
if (::strncmp(pos->first.GetCString(), orig_path, prefix_len) == 0) {
new_spec.SetFile(pos->second.GetCString(), false);
new_spec.AppendPathComponent(orig_path + prefix_len);
if (new_spec.Exists())
return true;
}
}
}
}
}
new_spec.Clear();
return false;
}
bool PathMappingList::Replace(const ConstString &path,
const ConstString &new_path, bool notify) {
uint32_t idx = FindIndexForPath(path);
if (idx < m_pairs.size()) {
++m_mod_id;
m_pairs[idx].second = new_path;
if (notify && m_callback)
m_callback(*this, m_callback_baton);
return true;
}
return false;
}
bool PathMappingList::Remove(const ConstString &path, bool notify) {
iterator pos = FindIteratorForPath(path);
if (pos != m_pairs.end()) {
++m_mod_id;
m_pairs.erase(pos);
if (notify && m_callback)
m_callback(*this, m_callback_baton);
return true;
}
return false;
}
PathMappingList::const_iterator
PathMappingList::FindIteratorForPath(const ConstString &path) const {
const_iterator pos;
const_iterator begin = m_pairs.begin();
const_iterator end = m_pairs.end();
for (pos = begin; pos != end; ++pos) {
if (pos->first == path)
break;
}
return pos;
}
PathMappingList::iterator
PathMappingList::FindIteratorForPath(const ConstString &path) {
iterator pos;
iterator begin = m_pairs.begin();
iterator end = m_pairs.end();
for (pos = begin; pos != end; ++pos) {
if (pos->first == path)
break;
}
return pos;
}
bool PathMappingList::GetPathsAtIndex(uint32_t idx, ConstString &path,
ConstString &new_path) const {
if (idx < m_pairs.size()) {
path = m_pairs[idx].first;
new_path = m_pairs[idx].second;
return true;
}
return false;
}
uint32_t PathMappingList::FindIndexForPath(const ConstString &path) const {
const_iterator pos;
const_iterator begin = m_pairs.begin();
const_iterator end = m_pairs.end();
for (pos = begin; pos != end; ++pos) {
if (pos->first == path)
return std::distance(begin, pos);
}
return UINT32_MAX;
}