interesting
/
libui
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Cleaned up Windows initialization error handling and migrated it to return the error message directly instead of through uiInitError.

This commit is contained in:
Pietro Gagliardi 2015-04-10 17:41:09 -04:00
parent f2760aebde
commit c205427bfb
1 changed files with 43 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
init_windows.c
View File

@ -13,23 +13,49 @@ struct uiInitError {
char failbuf[256];
};
static uiInitError *loadLastError(uiInitError *err, const char *message)
#define initErrorFormat L"error %s: %s%sGetLastError() == %I32u%s"
#define initErrorArgs wmessage, sysmsg, beforele, le, afterle
static const char *loadLastError(const char *message)
{
WCHAR *sysmsg;
BOOL hassysmsg;
WCHAR *beforele;
WCHAR *afterle;
int n;
WCHAR *wmessage;
WCHAR *wstr;
const char *str;
DWORD le;
le = GetLastError();
// TODO FormatMessageW() it
// TODO make sure argument is right; _snprintf_s() isn't supported on Windows XP
snprintf(err->failbuf, 256, "error %s (last error %I32u)", message, le);
err->msg = err->failbuf;
return err;
if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, le, 0, (LPWSTR) (&sysmsg), 0, NULL) != 0) {
hassysmsg = TRUE;
beforele = L" (";
afterle = L")";
} else {
hassysmsg = FALSE;
sysmsg = L"";
beforele = L"";
afterle = L"";
}
wmessage = toUTF16(message);
n = _scwprintf(initErrorFormat, initErrorArgs);
wstr = (WCHAR *) uiAlloc((n + 1) * sizeof (WCHAR), "WCHAR[]");
swprintf_s(wstr, n + 1, initErrorFormat, initErrorArgs);
str = toUTF8(wstr);
uiFree(wstr);
if (hassysmsg)
if (LocalFree(sysmsg) != NULL)
logLastError("error freeing system message in loadLastError()");
uiFree(wmessage);
return str;
}
uiInitOptions options;
uiInitError *uiInit(uiInitOptions *o)
const char *uiInit(uiInitOptions *o)
{
uiInitError *err;
STARTUPINFOW si;
const char *ce;
HICON hDefaultIcon;
@ -38,11 +64,9 @@ uiInitError *uiInit(uiInitOptions *o)
options = *o;
err = uiNew(uiInitError);
hInstance = GetModuleHandle(NULL);
if (hInstance == NULL)
return loadLastError(err, "getting program HINSTANCE");
return loadLastError("getting program HINSTANCE");
nCmdShow = SW_SHOWDEFAULT;
GetStartupInfoW(&si);
@ -51,43 +75,35 @@ uiInitError *uiInit(uiInitOptions *o)
ce = initCommonControls();
if (ce != NULL)
return loadLastError(err, ce);
return loadLastError(ce);
hDefaultIcon = LoadIconW(NULL, IDI_APPLICATION);
if (hDefaultIcon == NULL)
return loadLastError(err, "loading default icon for window classes");
return loadLastError("loading default icon for window classes");
hDefaultCursor = LoadCursorW(NULL, IDC_ARROW);
if (hDefaultCursor == NULL)
return loadLastError(err, "loading default cursor for window classes");
return loadLastError("loading default cursor for window classes");
if (registerWindowClass(hDefaultIcon, hDefaultCursor) == 0)
return loadLastError(err, "registering uiWindow window class");
return loadLastError("registering uiWindow window class");
ZeroMemory(&ncm, sizeof (NONCLIENTMETRICSW));
ncm.cbSize = sizeof (NONCLIENTMETRICSW);
if (SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof (NONCLIENTMETRICSW), &ncm, sizeof (NONCLIENTMETRICSW)) == 0)
return loadLastError(err, "getting default fonts");
return loadLastError("getting default fonts");
hMessageFont = CreateFontIndirectW(&(ncm.lfMessageFont));
if (hMessageFont == NULL)
return loadLastError(err, "loading default messagebox font; this is the default UI font");
return loadLastError("loading default messagebox font; this is the default UI font");
// give each control a reasonable initial parent
// don't free the initial parent!
// TODO tune this better; it shouldn't be closed, for instance
initialParent = (HWND) uiWindowHandle(uiNewWindow("", 0, 0));
uiFree(err);
return NULL;
}
const char *uiInitErrorMessage(uiInitError *err)
void uiFreeInitError(const char *err)
{
return err->msg;
}
void uiInitErrorFree(uiInitError *err)
{
if (err->msg != err->failbuf)
uiFree(err->msg);
uiFree(err);
uiFree((void *) err);
}