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!324 Fix failed to operate file of length over 260 issue on Windows

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Merge pull request !324 from huangyu/fix_win_long_path_squash
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openharmony_ci 2023-01-09 07:41:20 +00:00 committed by Gitee
commit 206af6c653
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1 changed files with 20 additions and 2 deletions
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22
platforms/windows/libpandabase/file.h
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@ -30,6 +30,10 @@
namespace panda::os::windows::file {
// In windows API, the length of a path has a limitation of MAX_PATH, which is defined as 260 characters,
// the "\\?\" prefix is used to specify an extended-length path for a maximum length of 32,767 characters.
static const std::string PREFIX_FOR_LONG_PATH = "\\\\?\\";
class File {
public:
explicit File(int fd) : fd_(fd) {}
@ -112,7 +116,8 @@ public:
static Expected<std::string, Error> GetAbsolutePath(std::string_view relative_path)
{
std::array<char, _MAX_PATH> buffer = {0};
constexpr size_t MAX_PATH_LEN = 2048;
std::array<char, MAX_PATH_LEN> buffer = {0};
auto fp = _fullpath(buffer.data(), relative_path.data(), buffer.size() - 1);
if (fp == nullptr) {
return Unexpected(Error(errno));
@ -121,6 +126,15 @@ public:
return std::string(fp);
}
static const std::string GetExtendedLengthStylePath(const std::string &path)
{
// PREFIX_FOR_LONG_PATH is added to specify it's an extended-length path,
// and the path needs to be composed of names seperated by backslashes
std::string extendedPath = PREFIX_FOR_LONG_PATH + path;
std::replace(extendedPath.begin(), extendedPath.end(), '/', '\\');
return extendedPath;
}
static bool IsDirectory(const std::string &path)
{
return HasStatMode(path, _S_IFDIR);
@ -177,7 +191,11 @@ private:
{
struct _stat s = {};
if (_stat(path.c_str(), &s) != 0) {
std::string tmp_path = path;
if (UNLIKELY(path.length() >= _MAX_PATH)) {
tmp_path = GetExtendedLengthStylePath(path);
}
if (_stat(tmp_path.c_str(), &s) != 0) {
return false;
}