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721 lines (605 loc) · 21.1 KB
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//-----------------------------------------------------------------------------
// Platform-dependent functionality.
//
// Copyright 2017 whitequark
//-----------------------------------------------------------------------------
#if defined(__APPLE__)
// Include Apple headers before solvespace.h to avoid identifier clashes.
# include <CoreFoundation/CFString.h>
# include <CoreFoundation/CFURL.h>
# include <CoreFoundation/CFBundle.h>
#endif
#include "solvespace.h"
#include "mimalloc.h"
#include "config.h"
#if defined(WIN32)
// Conversely, include Microsoft headers after solvespace.h to avoid clashes.
# include <windows.h>
# include <shellapi.h>
#else
# include <unistd.h>
# include <sys/stat.h>
#endif
namespace SolveSpace {
namespace Platform {
//-----------------------------------------------------------------------------
// UTF-8 ⟷ UTF-16 conversion, on Windows.
//-----------------------------------------------------------------------------
#if defined(WIN32)
std::string Narrow(const wchar_t *in)
{
std::string out;
DWORD len = WideCharToMultiByte(CP_UTF8, 0, in, -1, NULL, 0, NULL, NULL);
out.resize(len - 1);
ssassert(WideCharToMultiByte(CP_UTF8, 0, in, -1, &out[0], len, NULL, NULL),
"Invalid UTF-16");
return out;
}
std::string Narrow(const std::wstring &in)
{
if(in == L"") return "";
std::string out;
out.resize(WideCharToMultiByte(CP_UTF8, 0, &in[0], (int)in.length(),
NULL, 0, NULL, NULL));
ssassert(WideCharToMultiByte(CP_UTF8, 0, &in[0], (int)in.length(),
&out[0], (int)out.length(), NULL, NULL),
"Invalid UTF-16");
return out;
}
std::wstring Widen(const char *in)
{
std::wstring out;
DWORD len = MultiByteToWideChar(CP_UTF8, 0, in, -1, NULL, 0);
out.resize(len - 1);
ssassert(MultiByteToWideChar(CP_UTF8, 0, in, -1, &out[0], len),
"Invalid UTF-8");
return out;
}
std::wstring Widen(const std::string &in)
{
if(in == "") return L"";
std::wstring out;
out.resize(MultiByteToWideChar(CP_UTF8, 0, &in[0], (int)in.length(), NULL, 0));
ssassert(MultiByteToWideChar(CP_UTF8, 0, &in[0], (int)in.length(),
&out[0], (int)out.length()),
"Invalid UTF-8");
return out;
}
#endif
//-----------------------------------------------------------------------------
// Path utility functions.
//-----------------------------------------------------------------------------
static std::vector<std::string> Split(const std::string &joined, char separator) {
std::vector<std::string> parts;
size_t oldpos = 0, pos = 0;
while(true) {
oldpos = pos;
pos = joined.find(separator, pos);
if(pos == std::string::npos) break;
parts.push_back(joined.substr(oldpos, pos - oldpos));
pos += 1;
}
if(oldpos != joined.length() - 1) {
parts.push_back(joined.substr(oldpos));
}
return parts;
}
static std::string Concat(const std::vector<std::string> &parts, char separator) {
std::string joined;
bool first = true;
for(auto &part : parts) {
if(!first) joined += separator;
joined += part;
first = false;
}
return joined;
}
//-----------------------------------------------------------------------------
// Path manipulation.
//-----------------------------------------------------------------------------
#if defined(WIN32)
const char SEPARATOR = '\\';
#else
const char SEPARATOR = '/';
#endif
Path Path::From(std::string raw) {
Path path = { raw };
return path;
}
Path Path::CurrentDirectory() {
#if defined(WIN32)
// On Windows, OpenFile needs an absolute UNC path proper, so get that.
std::wstring rawW;
rawW.resize(GetCurrentDirectoryW(0, NULL));
DWORD length = GetCurrentDirectoryW((int)rawW.length(), &rawW[0]);
ssassert(length > 0 && length == rawW.length() - 1, "Cannot get current directory");
rawW.resize(length);
return From(Narrow(rawW));
#else
char *raw = getcwd(NULL, 0);
ssassert(raw != NULL, "Cannot get current directory");
Path path = From(raw);
free(raw);
return path;
#endif
}
std::string Path::FileName() const {
std::string fileName = raw;
size_t slash = fileName.rfind(SEPARATOR);
if(slash != std::string::npos) {
fileName = fileName.substr(slash + 1);
}
return fileName;
}
std::string Path::FileStem() const {
std::string baseName = FileName();
size_t dot = baseName.rfind('.');
if(dot != std::string::npos) {
baseName = baseName.substr(0, dot);
}
return baseName;
}
std::string Path::Extension() const {
size_t dot = raw.rfind('.');
if(dot != std::string::npos) {
return raw.substr(dot + 1);
}
return "";
}
bool Path::HasExtension(std::string theirExt) const {
std::string ourExt = Extension();
std::transform(ourExt.begin(), ourExt.end(), ourExt.begin(), ::tolower);
std::transform(theirExt.begin(), theirExt.end(), theirExt.begin(), ::tolower);
return ourExt == theirExt;
}
Path Path::WithExtension(std::string ext) const {
Path withExt = *this;
size_t dot = withExt.raw.rfind('.');
if(dot != std::string::npos) {
withExt.raw.erase(dot);
}
if(!ext.empty()) {
withExt.raw += ".";
withExt.raw += ext;
}
return withExt;
}
static void FindPrefix(const std::string &raw, size_t *pos) {
*pos = std::string::npos;
#if defined(WIN32)
if(raw.size() >= 7 && raw[2] == '?' && raw[3] == '\\' &&
isalpha(raw[4]) && raw[5] == ':' && raw[6] == '\\') {
*pos = 7;
} else if(raw.size() >= 3 && isalpha(raw[0]) && raw[1] == ':' && raw[2] == '\\') {
*pos = 3;
} else if(raw.size() >= 2 && raw[0] == '\\' && raw[1] == '\\') {
size_t slashAt = raw.find('\\', 2);
if(slashAt != std::string::npos) {
*pos = raw.find('\\', slashAt + 1);
}
}
#else
if(!raw.empty() && raw[0] == '/') {
*pos = 1;
}
#endif
}
bool Path::IsAbsolute() const {
size_t pos;
FindPrefix(raw, &pos);
return pos != std::string::npos;
}
// Removes one component from the end of the path.
// Returns an empty path if the path consists only of a root.
Path Path::Parent() const {
Path parent = { raw };
if(!parent.raw.empty() && parent.raw.back() == SEPARATOR) {
parent.raw.pop_back();
}
size_t slash = parent.raw.rfind(SEPARATOR);
if(slash != std::string::npos) {
parent.raw = parent.raw.substr(0, slash + 1);
} else {
parent.raw.clear();
}
if(IsAbsolute() && !parent.IsAbsolute()) {
return From("");
}
return parent;
}
// Concatenates a component to this path.
// Returns an empty path if this path or the component is empty.
Path Path::Join(const std::string &component) const {
ssassert(component.find(SEPARATOR) == std::string::npos,
"Use the Path::Join(const Path &) overload to append an entire path");
return Join(Path::From(component));
}
// Concatenates a relative path to this path.
// Returns an empty path if either path is empty, or the other path is absolute.
Path Path::Join(const Path &other) const {
if(IsEmpty() || other.IsEmpty() || other.IsAbsolute()) {
return From("");
}
Path joined = { raw };
if(joined.raw.back() != SEPARATOR) {
joined.raw += SEPARATOR;
}
joined.raw += other.raw;
return joined;
}
// Expands the "." and ".." components in this path.
// On Windows, additionally prepends the UNC prefix to absolute paths without one.
// Returns an empty path if a ".." component would escape from the root.
Path Path::Expand(bool fromCurrentDirectory) const {
Path source;
Path expanded;
if(fromCurrentDirectory && !IsAbsolute()) {
source = CurrentDirectory().Join(*this);
} else {
source = *this;
}
size_t splitAt;
FindPrefix(source.raw, &splitAt);
if(splitAt != std::string::npos) {
expanded.raw = source.raw.substr(0, splitAt);
} else {
splitAt = 0;
}
std::vector<std::string> expandedComponents;
for(std::string component : Split(source.raw.substr(splitAt), SEPARATOR)) {
if(component == ".") {
// skip
} else if(component == "..") {
if(!expandedComponents.empty()) {
expandedComponents.pop_back();
} else {
return From("");
}
} else if(!component.empty()) {
expandedComponents.push_back(component);
}
}
if(expanded.IsEmpty()) {
if(expandedComponents.empty()) {
expandedComponents.emplace_back(".");
}
expanded = From(Concat(expandedComponents, SEPARATOR));
} else if(!expandedComponents.empty()) {
expanded = expanded.Join(From(Concat(expandedComponents, SEPARATOR)));
}
#if defined(WIN32)
if(expanded.IsAbsolute() && expanded.raw.substr(0, 2) != "\\\\") {
expanded.raw = "\\\\?\\" + expanded.raw;
}
#endif
return expanded;
}
static std::string FilesystemNormalize(const std::string &str) {
#if defined(WIN32)
std::wstring strW = Widen(str);
std::transform(strW.begin(), strW.end(), strW.begin(), towlower);
return Narrow(strW);
#elif defined(__APPLE__)
CFMutableStringRef cfStr =
CFStringCreateMutableCopy(NULL, 0,
CFStringCreateWithBytesNoCopy(NULL, (const UInt8*)str.data(), str.size(),
kCFStringEncodingUTF8, /*isExternalRepresentation=*/false, kCFAllocatorNull));
CFStringLowercase(cfStr, NULL);
std::string normalizedStr;
normalizedStr.resize(CFStringGetMaximumSizeOfFileSystemRepresentation(cfStr));
CFStringGetFileSystemRepresentation(cfStr, &normalizedStr[0], normalizedStr.size());
normalizedStr.erase(normalizedStr.find('\0'));
return normalizedStr;
#else
return str;
#endif
}
bool Path::Equals(const Path &other) const {
return FilesystemNormalize(raw) == FilesystemNormalize(other.raw);
}
// Returns a relative path from a given base path.
// Returns an empty path if any of the paths is not absolute, or
// if they belong to different roots, or
// if they cannot be expanded.
Path Path::RelativeTo(const Path &base) const {
Path expanded = Expand();
Path baseExpanded = base.Expand();
if(!(expanded.IsAbsolute() && baseExpanded.IsAbsolute())){
return From("");
}
size_t splitAt;
FindPrefix(expanded.raw, &splitAt);
size_t baseSplitAt;
FindPrefix(baseExpanded.raw, &baseSplitAt);
if(FilesystemNormalize(expanded.raw.substr(0, splitAt)) !=
FilesystemNormalize(baseExpanded.raw.substr(0, splitAt))) {
return From("");
}
std::vector<std::string> components =
Split(expanded.raw.substr(splitAt), SEPARATOR);
std::vector<std::string> baseComponents =
Split(baseExpanded.raw.substr(baseSplitAt), SEPARATOR);
size_t common;
for(common = 0; common < baseComponents.size() &&
common < components.size(); common++) {
if(FilesystemNormalize(baseComponents[common]) !=
FilesystemNormalize(components[common])) {
break;
}
}
std::vector<std::string> resultComponents;
for(size_t i = common; i < baseComponents.size(); i++) {
resultComponents.emplace_back("..");
}
resultComponents.insert(resultComponents.end(),
components.begin() + common, components.end());
if(resultComponents.empty()) {
resultComponents.emplace_back(".");
}
return From(Concat(resultComponents, SEPARATOR));
}
Path Path::FromPortable(const std::string &repr) {
return From(Concat(Split(repr, '/'), SEPARATOR));
}
std::string Path::ToPortable() const {
ssassert(!IsAbsolute(), "absolute paths cannot be made portable");
return Concat(Split(raw, SEPARATOR), '/');
}
//-----------------------------------------------------------------------------
// File manipulation.
//-----------------------------------------------------------------------------
FILE *OpenFile(const Platform::Path &filename, const char *mode) {
ssassert(filename.raw.length() == strlen(filename.raw.c_str()),
"Unexpected null byte in middle of a path");
#if defined(WIN32)
return _wfopen(Widen(filename.Expand(/*fromCurrentDirectory=*/true).raw).c_str(), Widen(mode).c_str());
#else
return fopen(filename.raw.c_str(), mode);
#endif
}
bool FileExists(const Platform::Path &filename) {
FILE *f = OpenFile(filename, "rb");
if(f == NULL) return false;
fclose(f);
return true;
}
void RemoveFile(const Platform::Path &filename) {
ssassert(filename.raw.length() == strlen(filename.raw.c_str()),
"Unexpected null byte in middle of a path");
#if defined(WIN32)
_wremove(Widen(filename.Expand().raw).c_str());
#else
remove(filename.raw.c_str());
#endif
}
bool ReadFile(const Platform::Path &filename, std::string *data) {
FILE *f = OpenFile(filename, "rb");
if(f == NULL) return false;
if(fseek(f, 0, SEEK_END) != 0)
return false;
data->resize(ftell(f));
if(fseek(f, 0, SEEK_SET) != 0)
return false;
if(fread(&(*data)[0], 1, data->size(), f) != data->size())
return false;
if(fclose(f) != 0)
return false;
return true;
}
bool WriteFile(const Platform::Path &filename, const std::string &data) {
FILE *f = OpenFile(filename, "wb");
if(f == NULL) return false;
if(fwrite(&data[0], 1, data.size(), f) != data.size())
return false;
if(fclose(f) != 0)
return false;
return true;
}
//-----------------------------------------------------------------------------
// Loading resources, on Windows.
//-----------------------------------------------------------------------------
#if defined(WIN32)
const void *LoadResource(const std::string &name, size_t *size) {
HRSRC hres = FindResourceW(NULL, Widen(name).c_str(), (LPWSTR)RT_RCDATA);
ssassert(hres != NULL, "Cannot find resource");
HGLOBAL res = ::LoadResource(NULL, hres);
ssassert(res != NULL, "Cannot load resource");
*size = SizeofResource(NULL, hres);
return LockResource(res);
}
#endif
//-----------------------------------------------------------------------------
// Loading resources, on *nix.
//-----------------------------------------------------------------------------
#if defined(__APPLE__)
static Platform::Path PathFromCFURL(CFURLRef cfUrl) {
Path path;
CFStringRef cfPath = CFURLCopyFileSystemPath(cfUrl, kCFURLPOSIXPathStyle);
path.raw.resize(CFStringGetMaximumSizeOfFileSystemRepresentation(cfPath));
CFStringGetFileSystemRepresentation(cfPath, &path.raw[0], path.raw.size());
path.raw.erase(path.raw.find('\0'));
CFRelease(cfPath);
return path;
}
static Platform::Path ResourcePath(const std::string &name) {
Path path;
// First, try to get the URL from the bundle.
CFStringRef cfName = CFStringCreateWithCString(kCFAllocatorDefault, name.c_str(),
kCFStringEncodingUTF8);
CFURLRef cfUrl = CFBundleCopyResourceURL(CFBundleGetMainBundle(), cfName, NULL, NULL);
if(cfUrl != NULL) {
path = PathFromCFURL(cfUrl);
CFRelease(cfUrl);
}
CFRelease(cfName);
if(!path.IsEmpty()) return path;
// If that failed, it means we aren't running from the bundle.
// Reference off the executable path, then.
cfUrl = CFBundleCopyExecutableURL(CFBundleGetMainBundle());
if(cfUrl != NULL) {
path = PathFromCFURL(cfUrl).Parent().Parent().Join("res");
path = path.Join(Path::FromPortable(name));
CFRelease(cfUrl);
}
return path;
}
#elif defined(__EMSCRIPTEN__)
static Platform::Path ResourcePath(const std::string &name) {
return Path::From("res/" + name);
}
#elif !defined(WIN32)
# if defined(__linux__)
static const char *selfSymlink = "/proc/self/exe";
# elif defined(__NetBSD__)
static const char *selfSymlink = "/proc/curproc/exe";
# elif defined(__OpenBSD__) || defined(__FreeBSD__)
static const char *selfSymlink = "/proc/curproc/file";
# else
static const char *selfSymlink = "";
# endif
static Platform::Path FindLocalResourceDir() {
// Find out the path to the running binary.
Platform::Path selfPath;
char *expandedSelfPath = realpath(selfSymlink, NULL);
if(expandedSelfPath != NULL) {
selfPath = Path::From(expandedSelfPath);
}
free(expandedSelfPath);
Platform::Path resourceDir;
if(selfPath.IsEmpty()) {
// We don't know how to find the local resource directory on this platform,
// so use the global one (by returning an empty string).
return Path::From(UNIX_DATADIR);
} else {
resourceDir = selfPath.Parent().Parent().Join("res");
}
struct stat st;
if(stat(resourceDir.raw.c_str(), &st) != -1) {
// An executable-adjacent resource directory exists, good.
return resourceDir;
}
resourceDir = selfPath.Parent().Parent().Join("share").Join("solvespace");
if(stat(resourceDir.raw.c_str(), &st) != -1) {
// A resource directory exists at a relative path, good.
return resourceDir;
}
// No executable-adjacent resource directory; use the one from compile-time prefix.
return Path::From(UNIX_DATADIR);
}
static Platform::Path ResourcePath(const std::string &name) {
static Platform::Path resourceDir;
if(resourceDir.IsEmpty()) {
resourceDir = FindLocalResourceDir();
}
return resourceDir.Join(Path::FromPortable(name));
}
#endif
#if !defined(WIN32)
const void *LoadResource(const std::string &name, size_t *size) {
static std::map<std::string, std::string> cache;
auto it = cache.find(name);
if(it == cache.end()) {
ssassert(ReadFile(ResourcePath(name), &cache[name]), "Cannot read resource");
it = cache.find(name);
}
const std::string &content = (*it).second;
*size = content.size();
return (const void*)content.data();
}
#endif
//-----------------------------------------------------------------------------
// Startup and command-line argument handling, on Windows.
//-----------------------------------------------------------------------------
#if defined(WIN32)
std::vector<std::string> InitCli(int argc, char **argv) {
#if defined(_MSC_VER)
// We display our own message on abort; just call ReportFault.
_set_abort_behavior(_CALL_REPORTFAULT, _WRITE_ABORT_MSG|_CALL_REPORTFAULT);
int crtReportTypes[] = {_CRT_WARN, _CRT_ERROR, _CRT_ASSERT};
for(int crtReportType : crtReportTypes) {
_CrtSetReportMode(crtReportType, _CRTDBG_MODE_FILE|_CRTDBG_MODE_DEBUG);
_CrtSetReportFile(crtReportType, _CRTDBG_FILE_STDERR);
}
#endif
// Extract the command-line arguments; the ones from main() are ignored,
// since they are in the OEM encoding.
int argcW;
LPWSTR *argvW = CommandLineToArgvW(GetCommandLineW(), &argcW);
std::vector<std::string> args;
for(int i = 0; i < argcW; i++)
args.push_back(Platform::Narrow(argvW[i]));
LocalFree(argvW);
return args;
}
#endif
//-----------------------------------------------------------------------------
// Startup and command-line argument handling, on *nix.
//-----------------------------------------------------------------------------
#if !defined(WIN32)
std::vector<std::string> InitCli(int argc, char **argv) {
return {&argv[0], &argv[argc]};
}
#endif
//-----------------------------------------------------------------------------
// Debug output, on Windows.
//-----------------------------------------------------------------------------
#if defined(WIN32)
void DebugPrint(const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
int len = _vscprintf(fmt, va) + 1;
va_end(va);
va_start(va, fmt);
char *buf = (char *)_alloca(len);
_vsnprintf(buf, len, fmt, va);
va_end(va);
// The native version of OutputDebugString, unlike most others,
// is OutputDebugStringA.
OutputDebugStringA(buf);
OutputDebugStringA("\n");
#ifndef NDEBUG
// Duplicate to stderr in debug builds, but not in release; this is slow.
fputs(buf, stderr);
fputc('\n', stderr);
#endif
}
#endif
//-----------------------------------------------------------------------------
// Debug output, on *nix.
//-----------------------------------------------------------------------------
#if !defined(WIN32)
void DebugPrint(const char *fmt, ...) {
va_list va;
va_start(va, fmt);
vfprintf(stderr, fmt, va);
fputc('\n', stderr);
va_end(va);
}
#endif
//-----------------------------------------------------------------------------
// Temporary arena.
//-----------------------------------------------------------------------------
struct MimallocHeap {
mi_heap_t *heap = NULL;
~MimallocHeap() {
if(heap != NULL)
mi_heap_destroy(heap);
}
};
static thread_local MimallocHeap TempArena;
void *AllocTemporary(size_t size) {
if(TempArena.heap == NULL) {
TempArena.heap = mi_heap_new();
ssassert(TempArena.heap != NULL, "out of memory");
}
void *ptr = mi_heap_zalloc(TempArena.heap, size);
ssassert(ptr != NULL, "out of memory");
return ptr;
}
void FreeAllTemporary() {
MimallocHeap temp;
std::swap(TempArena.heap, temp.heap);
}
}
}