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os_resolve_shortcut: cleanup

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This commit is contained in:
Justin M. Keyes 2016-05-29 05:18:05 -04:00
parent 618aad3811
commit d96b359410
1 changed files with 46 additions and 54 deletions
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100
src/nvim/os/fs.c
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@ -935,41 +935,40 @@ bool os_fileid_equal_fileinfo(const FileID *file_id,
# define CP_UTF8 65001 /* magic number from winnls.h */
#endif
static int utf8_to_utf16(const char *path, const WCHAR **pathw)
static int utf8_to_utf16(const char *str, WCHAR **strw)
FUNC_ATTR_NONNULL_ALL
{
ssize_t buf_sz = 0, path_len, pathw_len = 0;
ssize_t wchar_len = 0;
// Compute the length needed to store the converted widechar string.
pathw_len = MultiByteToWideChar(CP_UTF8,
wchar_len = MultiByteToWideChar(CP_UTF8,
0, // dwFlags: must be 0 for utf8
path, // lpMultiByteStr: string to convert
-1,
str, // lpMultiByteStr: string to convert
-1, // -1 => process up to NUL
NULL, // lpWideCharStr: converted string
0); // 0 => return length, don't convert
if (pathw_len == 0) {
0); // 0 => return length, don't convert
if (wchar_len == 0) {
return GetLastError();
}
buf_sz += pathw_len * sizeof(WCHAR);
ssize_t buf_sz = wchar_len * sizeof(WCHAR);
if (buf_sz == 0) {
*pathw = NULL;
*strw = NULL;
return 0;
}
char* buf = xmalloc(buf_sz);
char* pos = buf;
DWORD r = MultiByteToWideChar(CP_UTF8,
int r = MultiByteToWideChar(CP_UTF8,
0,
path,
str,
-1,
(WCHAR*) pos,
pathw_len);
assert(r == (DWORD) pathw_len);
*pathw = (WCHAR*) pos;
pos += r * sizeof(WCHAR);
wchar_len);
assert(r == wchar_len);
*strw = (WCHAR*) pos;
return 0;
}
@ -982,12 +981,10 @@ char_u * os_resolve_shortcut(char_u *fname)
HRESULT hr;
IPersistFile *ppf = NULL;
OLECHAR wsz[MAX_PATH];
WIN32_FIND_DATA ffd; // we get those free of charge
CHAR buf[MAX_PATH]; // could have simply reused 'wsz'...
char_u *rfname = NULL;
int len;
IShellLinkW *pslw = NULL;
WIN32_FIND_DATAW ffdw; // we get those free of charge
WIN32_FIND_DATAW ffdw;
// Check if the file name ends in ".lnk". Avoid calling CoCreateInstance(),
// it's quite slow.
@ -1001,61 +998,56 @@ char_u * os_resolve_shortcut(char_u *fname)
CoInitialize(NULL);
# ifdef FEAT_MBYTE
if (enc_codepage >= 0 && (int)GetACP() != enc_codepage) {
// create a link manager object and request its interface
hr = CoCreateInstance(&CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
&IID_IShellLinkW, (void**)&pslw);
if (hr == S_OK) {
WCHAR **p;
int len = utf8_to_utf16((char *)fname, p);
// create a link manager object and request its interface
hr = CoCreateInstance(&CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
&IID_IShellLinkW, (void**)&pslw);
if (hr == S_OK) {
WCHAR **p;
//TODO(jkeyes): if this returns non-zero, report the error
(void)utf8_to_utf16((char *)fname, p);
if (p != NULL) {
// Get a pointer to the IPersistFile interface.
hr = pslw->lpVtbl->QueryInterface(
pslw, &IID_IPersistFile, (void**)&ppf);
if (hr != S_OK) {
goto shortcut_errorw;
}
if (p != NULL) {
// Get a pointer to the IPersistFile interface.
hr = pslw->lpVtbl->QueryInterface(
pslw, &IID_IPersistFile, (void**)&ppf);
if (hr != S_OK) {
goto shortcut_errorw;
}
// "load" the name and resolve the link
hr = ppf->lpVtbl->Load(ppf, p, STGM_READ);
if (hr != S_OK) {
goto shortcut_errorw;
}
// "load" the name and resolve the link
hr = ppf->lpVtbl->Load(ppf, p, STGM_READ);
if (hr != S_OK) {
goto shortcut_errorw;
}
# if 0 // This makes Vim wait a long time if the target does not exist.
hr = pslw->lpVtbl->Resolve(pslw, NULL, SLR_NO_UI);
if (hr != S_OK) {
goto shortcut_errorw;
}
hr = pslw->lpVtbl->Resolve(pslw, NULL, SLR_NO_UI);
if (hr != S_OK) {
goto shortcut_errorw;
}
# endif
// Get the path to the link target.
ZeroMemory(wsz, MAX_PATH * sizeof(WCHAR));
hr = pslw->lpVtbl->GetPath(pslw, wsz, MAX_PATH, &ffdw, 0);
if (hr == S_OK && wsz[0] != NUL) {
rfname = utf16_to_enc(wsz, NULL);
}
// Get the path to the link target.
ZeroMemory(wsz, MAX_PATH * sizeof(WCHAR));
hr = pslw->lpVtbl->GetPath(pslw, wsz, MAX_PATH, &ffdw, 0);
if (hr == S_OK && wsz[0] != NUL) {
rfname = utf16_to_enc(wsz, NULL);
}
shortcut_errorw:
xfree(p);
goto shortcut_end;
}
xfree(p);
goto shortcut_end;
}
}
# endif
shortcut_end:
// Release all interface pointers (both belong to the same object)
if (ppf != NULL) {
ppf->lpVtbl->Release(ppf);
}
# ifdef FEAT_MBYTE
if (pslw != NULL) {
pslw->lpVtbl->Release(pslw);
}
# endif
CoUninitialize();
return rfname;