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Mostly cleanup, but also some bug fixes, for win32/Path.cpp

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19202 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeff Cohen 2004-12-31 19:01:08 +00:00
parent 92ced2f16a
commit 51b8d211f6
2 changed files with 162 additions and 76 deletions
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119
lib/System/Win32/Path.cpp
View File

@ -20,7 +20,6 @@
//===----------------------------------------------------------------------===//
#include "Win32.h"
#include <fstream>
#include <malloc.h>
// We need to undo a macro defined in Windows.h, otherwise we won't compile:
@ -205,23 +204,18 @@ Path::getBasename() const {
}
bool Path::hasMagicNumber(const std::string &Magic) const {
size_t len = Magic.size();
char *buf = reinterpret_cast<char *>(_alloca(len+1));
std::ifstream f(path.c_str());
f.read(buf, len);
buf[len] = '\0';
return Magic == buf;
std::string actualMagic;
if (getMagicNumber(actualMagic, Magic.size()))
return Magic == actualMagic;
return false;
}
bool
Path::isBytecodeFile() const {
char buffer[ 4];
buffer[0] = 0;
std::ifstream f(path.c_str());
f.read(buffer, 4);
if (f.bad())
ThrowErrno("can't read file signature");
return 0 == memcmp(buffer,"llvc",4) || 0 == memcmp(buffer,"llvm",4);
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "llvc" || actualMagic == "llvm";
}
bool
@ -357,9 +351,12 @@ Path::getDirectoryContents(std::set<Path>& result) const {
result.insert(aPath);
} while (FindNextFile(h, &fd));
CloseHandle(h);
if (GetLastError() != ERROR_NO_MORE_FILES)
DWORD err = GetLastError();
FindClose(h);
if (err != ERROR_NO_MORE_FILES) {
SetLastError(err);
ThrowError(path + ": Can't read directory: ");
}
return true;
}
@ -539,7 +536,7 @@ Path::createFile() {
HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE)
ThrowError(std::string(path.c_str()) + ": Can't create file: ");
ThrowError(path + ": Can't create file: ");
CloseHandle(h);
return true;
@ -560,17 +557,49 @@ Path::destroyDirectory(bool remove_contents) const {
pathname[lastchar] = 0;
if (remove_contents) {
// Recursively descend the directory to remove its content
// FIXME: The correct way of doing this on Windows isn't pretty...
// but this may work if unix-like utils are present.
std::string cmd("rm -rf ");
cmd += path;
system(cmd.c_str());
} else {
// Otherwise, try to just remove the one directory
if (!RemoveDirectory(pathname))
ThrowError(std::string(pathname) + ": Can't destroy directory: ");
WIN32_FIND_DATA fd;
HANDLE h = FindFirstFile(path.c_str(), &fd);
// It's a bad idea to alter the contents of a directory while enumerating
// its contents. So build a list of its contents first, then destroy them.
if (h != INVALID_HANDLE_VALUE) {
std::vector<Path> list;
do {
if (strcmp(fd.cFileName, ".") == 0)
continue;
if (strcmp(fd.cFileName, "..") == 0)
continue;
Path aPath(path + &fd.cFileName[0]);
if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
aPath.path += "/";
list.push_back(aPath);
} while (FindNextFile(h, &fd));
DWORD err = GetLastError();
FindClose(h);
if (err != ERROR_NO_MORE_FILES) {
SetLastError(err);
ThrowError(path + ": Can't read directory: ");
}
for (std::vector<Path>::iterator I = list.begin(); I != list.end(); ++I) {
Path &aPath = *I;
if (aPath.isDirectory())
aPath.destroyDirectory(true);
else
aPath.destroyFile();
}
} else {
if (GetLastError() != ERROR_NO_MORE_FILES)
ThrowError(path + ": Can't read directory: ");
}
}
if (!RemoveDirectory(pathname))
ThrowError(std::string(pathname) + ": Can't destroy directory: ");
return true;
}
@ -588,11 +617,11 @@ Path::destroyFile() const {
// attribute first.
if (attr & FILE_ATTRIBUTE_READONLY) {
if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY))
ThrowError(std::string(path.c_str()) + ": Can't destroy file: ");
ThrowError(path + ": Can't destroy file: ");
}
if (!DeleteFile(path.c_str()))
ThrowError(std::string(path.c_str()) + ": Can't destroy file: ");
ThrowError(path + ": Can't destroy file: ");
return true;
}
@ -601,15 +630,24 @@ bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
return false;
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
std::ofstream ofs(path.c_str(),std::ofstream::in);
if (!ofs.is_open())
HANDLE h = CreateFile(path.c_str(),
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (h == INVALID_HANDLE_VALUE)
return false;
std::ifstream ifs(path.c_str());
if (!ifs.is_open())
DWORD nRead = 0;
BOOL ret = ReadFile(h, buf, len, &nRead, NULL);
CloseHandle(h);
if (!ret || nRead != len)
return false;
ifs.read(buf, len);
ofs.close();
ifs.close();
buf[len] = '\0';
Magic = buf;
return true;
@ -640,16 +678,21 @@ Path::setStatusInfo(const StatusInfo& si) const {
BY_HANDLE_FILE_INFORMATION bhfi;
if (!GetFileInformationByHandle(h, &bhfi)) {
DWORD err = GetLastError();
CloseHandle(h);
SetLastError(err);
ThrowError(path + ": GetFileInformationByHandle: ");
}
FILETIME ft;
(uint64_t&)ft = si.modTime.toWin32Time();
BOOL ret = SetFileTime(h, NULL, &ft, &ft);
DWORD err = GetLastError();
CloseHandle(h);
if (!ret)
if (!ret) {
SetLastError(err);
ThrowError(path + ": SetFileTime: ");
}
// Best we can do with Unix permission bits is to interpret the owner
// writable bit.
@ -690,7 +733,7 @@ Path::makeUnique(bool reuse_current) {
char newName[MAX_PATH + 1];
if (!GetTempFileName(dir.c_str(), fname.c_str(), 0, newName))
ThrowError("Cannot make unique filename for '" + path + "'");
ThrowError("Cannot make unique filename for '" + path + "': ");
path = newName;
}

119
lib/System/Win32/Path.inc
View File

@ -20,7 +20,6 @@
//===----------------------------------------------------------------------===//
#include "Win32.h"
#include <fstream>
#include <malloc.h>
// We need to undo a macro defined in Windows.h, otherwise we won't compile:
@ -205,23 +204,18 @@ Path::getBasename() const {
}
bool Path::hasMagicNumber(const std::string &Magic) const {
size_t len = Magic.size();
char *buf = reinterpret_cast<char *>(_alloca(len+1));
std::ifstream f(path.c_str());
f.read(buf, len);
buf[len] = '\0';
return Magic == buf;
std::string actualMagic;
if (getMagicNumber(actualMagic, Magic.size()))
return Magic == actualMagic;
return false;
}
bool
Path::isBytecodeFile() const {
char buffer[ 4];
buffer[0] = 0;
std::ifstream f(path.c_str());
f.read(buffer, 4);
if (f.bad())
ThrowErrno("can't read file signature");
return 0 == memcmp(buffer,"llvc",4) || 0 == memcmp(buffer,"llvm",4);
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "llvc" || actualMagic == "llvm";
}
bool
@ -357,9 +351,12 @@ Path::getDirectoryContents(std::set<Path>& result) const {
result.insert(aPath);
} while (FindNextFile(h, &fd));
CloseHandle(h);
if (GetLastError() != ERROR_NO_MORE_FILES)
DWORD err = GetLastError();
FindClose(h);
if (err != ERROR_NO_MORE_FILES) {
SetLastError(err);
ThrowError(path + ": Can't read directory: ");
}
return true;
}
@ -539,7 +536,7 @@ Path::createFile() {
HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE)
ThrowError(std::string(path.c_str()) + ": Can't create file: ");
ThrowError(path + ": Can't create file: ");
CloseHandle(h);
return true;
@ -560,17 +557,49 @@ Path::destroyDirectory(bool remove_contents) const {
pathname[lastchar] = 0;
if (remove_contents) {
// Recursively descend the directory to remove its content
// FIXME: The correct way of doing this on Windows isn't pretty...
// but this may work if unix-like utils are present.
std::string cmd("rm -rf ");
cmd += path;
system(cmd.c_str());
} else {
// Otherwise, try to just remove the one directory
if (!RemoveDirectory(pathname))
ThrowError(std::string(pathname) + ": Can't destroy directory: ");
WIN32_FIND_DATA fd;
HANDLE h = FindFirstFile(path.c_str(), &fd);
// It's a bad idea to alter the contents of a directory while enumerating
// its contents. So build a list of its contents first, then destroy them.
if (h != INVALID_HANDLE_VALUE) {
std::vector<Path> list;
do {
if (strcmp(fd.cFileName, ".") == 0)
continue;
if (strcmp(fd.cFileName, "..") == 0)
continue;
Path aPath(path + &fd.cFileName[0]);
if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
aPath.path += "/";
list.push_back(aPath);
} while (FindNextFile(h, &fd));
DWORD err = GetLastError();
FindClose(h);
if (err != ERROR_NO_MORE_FILES) {
SetLastError(err);
ThrowError(path + ": Can't read directory: ");
}
for (std::vector<Path>::iterator I = list.begin(); I != list.end(); ++I) {
Path &aPath = *I;
if (aPath.isDirectory())
aPath.destroyDirectory(true);
else
aPath.destroyFile();
}
} else {
if (GetLastError() != ERROR_NO_MORE_FILES)
ThrowError(path + ": Can't read directory: ");
}
}
if (!RemoveDirectory(pathname))
ThrowError(std::string(pathname) + ": Can't destroy directory: ");
return true;
}
@ -588,11 +617,11 @@ Path::destroyFile() const {
// attribute first.
if (attr & FILE_ATTRIBUTE_READONLY) {
if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY))
ThrowError(std::string(path.c_str()) + ": Can't destroy file: ");
ThrowError(path + ": Can't destroy file: ");
}
if (!DeleteFile(path.c_str()))
ThrowError(std::string(path.c_str()) + ": Can't destroy file: ");
ThrowError(path + ": Can't destroy file: ");
return true;
}
@ -601,15 +630,24 @@ bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
return false;
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
std::ofstream ofs(path.c_str(),std::ofstream::in);
if (!ofs.is_open())
HANDLE h = CreateFile(path.c_str(),
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (h == INVALID_HANDLE_VALUE)
return false;
std::ifstream ifs(path.c_str());
if (!ifs.is_open())
DWORD nRead = 0;
BOOL ret = ReadFile(h, buf, len, &nRead, NULL);
CloseHandle(h);
if (!ret || nRead != len)
return false;
ifs.read(buf, len);
ofs.close();
ifs.close();
buf[len] = '\0';
Magic = buf;
return true;
@ -640,16 +678,21 @@ Path::setStatusInfo(const StatusInfo& si) const {
BY_HANDLE_FILE_INFORMATION bhfi;
if (!GetFileInformationByHandle(h, &bhfi)) {
DWORD err = GetLastError();
CloseHandle(h);
SetLastError(err);
ThrowError(path + ": GetFileInformationByHandle: ");
}
FILETIME ft;
(uint64_t&)ft = si.modTime.toWin32Time();
BOOL ret = SetFileTime(h, NULL, &ft, &ft);
DWORD err = GetLastError();
CloseHandle(h);
if (!ret)
if (!ret) {
SetLastError(err);
ThrowError(path + ": SetFileTime: ");
}
// Best we can do with Unix permission bits is to interpret the owner
// writable bit.
@ -690,7 +733,7 @@ Path::makeUnique(bool reuse_current) {
char newName[MAX_PATH + 1];
if (!GetTempFileName(dir.c_str(), fname.c_str(), 0, newName))
ThrowError("Cannot make unique filename for '" + path + "'");
ThrowError("Cannot make unique filename for '" + path + "': ");
path = newName;
}