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win32.c: reuse fullpath buffer

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* win32/win32.c (open_dir_handle): reuse the fullpath buffer
  instead of allocating another buffer for copy.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-02-02 05:43:44 +00:00
parent 21daa56b2a
commit eee616315d
1 changed files with 13 additions and 18 deletions
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31
win32/win32.c
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@ -1869,12 +1869,9 @@ static HANDLE
open_dir_handle(const WCHAR *filename, WIN32_FIND_DATAW *fd)
{
HANDLE fh;
static const WCHAR wildcard[] = L"\\*";
WCHAR fullname[MAX_PATH];
WCHAR *scanname;
WCHAR fullname[_MAX_PATH + rb_strlen_lit("\\*")];
WCHAR *p;
int len = 0;
VALUE v;
//
// Create the search pattern
@ -1882,28 +1879,26 @@ open_dir_handle(const WCHAR *filename, WIN32_FIND_DATAW *fd)
fh = open_special(filename, 0, 0);
if (fh != INVALID_HANDLE_VALUE) {
len = get_final_path(fh, fullname, numberof(fullname), 0);
len = get_final_path(fh, fullname, _MAX_PATH, 0);
CloseHandle(fh);
}
if (len) {
filename = fullname;
}
else {
if (!len) {
len = lstrlenW(filename);
if (len >= _MAX_PATH) {
errno = ENAMETOOLONG;
return INVALID_HANDLE_VALUE;
}
MEMCPY(fullname, filename, WCHAR, len);
}
scanname = ALLOCV_N(WCHAR, v, len + numberof(wildcard));
lstrcpyW(scanname, filename);
p = CharPrevW(scanname, scanname + len);
if (*p == L'/' || *p == L'\\' || *p == L':')
lstrcatW(scanname, wildcard + 1);
else
lstrcatW(scanname, wildcard);
p = &fullname[len-1];
if (!(isdirsep(*p) || *p == L':')) *++p = L'\\';
*++p = L'*';
*++p = L'\0';
//
// do the FindFirstFile call
//
fh = FindFirstFileW(scanname, fd);
ALLOCV_END(v);
fh = FindFirstFileW(fullname, fd);
if (fh == INVALID_HANDLE_VALUE) {
errno = map_errno(GetLastError());
}