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Win32 Drag&Drop: Make sure we are using WCHAR functions and error handling

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Thomas Bernard 2020-12-06 12:00:35 +01:00
parent 0915f86aa3
commit 882a2892cf
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GPG Key ID: DB511043A31ACAAF
1 changed files with 48 additions and 17 deletions
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65
src/win32screen.c
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@ -27,6 +27,8 @@
#if defined(_MSC_VER) && _MSC_VER < 1900 #if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf #define snprintf _snprintf
#endif #endif
#include "gfx2mem.h"
#include "gfx2log.h"
#include "screen.h" #include "screen.h"
#include "errors.h" #include "errors.h"
#include "windows.h" #include "windows.h"
@ -329,27 +331,56 @@ static LRESULT CALLBACK Win32_WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LP
return 0; return 0;
case WM_DROPFILES: case WM_DROPFILES:
{ {
int file_count; UINT file_count;
HDROP hDrop = (HDROP)wParam; HDROP hDrop = (HDROP)wParam;
file_count = DragQueryFile(hDrop, (UINT)-1, NULL , 0); file_count = DragQueryFileW(hDrop, (UINT)-1, NULL, 0);
if (file_count > 0) if (file_count == 0)
GFX2_Log(GFX2_WARNING, "WM_DROPFILES but 0 files\n");
else
{ {
TCHAR LongDropFileName[MAX_PATH]; UINT longLen;
TCHAR ShortDropFileName[MAX_PATH];
if (DragQueryFile(hDrop, 0 , LongDropFileName ,(UINT) MAX_PATH))
{
Drop_file_name_unicode = Unicode_strdup((word *)LongDropFileName);
if (GetShortPathName(LongDropFileName, ShortDropFileName, MAX_PATH))
{
Drop_file_name = (char *)malloc(lstrlen(ShortDropFileName) + 1);
if (Drop_file_name != NULL)
{
int i;
for (i = 0; ShortDropFileName[i] != 0; i++) GFX2_Log(GFX2_DEBUG, "WM_DROPFILES %u files\n", file_count);
Drop_file_name[i] = (char)ShortDropFileName[i]; longLen = DragQueryFileW(hDrop, 0, NULL, 0);
Drop_file_name[i] = 0; if (longLen == 0)
GFX2_Log(GFX2_ERROR, "DragQueryFileW(%x, 0, NULL, 0) failed\n", hDrop);
else
{
Drop_file_name_unicode = GFX2_malloc(++longLen * sizeof(word)); // increment for NULL terminator
if (Drop_file_name_unicode != NULL)
{
if (DragQueryFileW(hDrop, 0, Drop_file_name_unicode, longLen) == 0)
GFX2_Log(GFX2_ERROR, "DragQueryFileW(%x, 0, %p, %u) failed\n", hDrop, Drop_file_name_unicode, longLen);
else
{
// get the short path name
UINT shortLen = GetShortPathNameW(Drop_file_name_unicode, NULL, 0);
if (shortLen == 0)
GFX2_Log(GFX2_ERROR, "GetShortPathNameW(%p, NULL, 0) failed\n", Drop_file_name_unicode);
else
{
WCHAR * ShortDropFileNameW = GFX2_malloc(shortLen * sizeof(WCHAR));
if (ShortDropFileNameW != NULL)
{
if (GetShortPathNameW(Drop_file_name_unicode, ShortDropFileNameW, shortLen) == 0)
GFX2_Log(GFX2_ERROR, "GetShortPathNameW(%p, %p, %u) failed\n", Drop_file_name_unicode, ShortDropFileNameW, shortLen);
else
{
// convert to ANSI/ASCII
Drop_file_name = (char *)GFX2_malloc(shortLen);
if (Drop_file_name != NULL)
{
int i;
for (i = 0; ShortDropFileNameW[i] != 0; i++)
Drop_file_name[i] = (char)ShortDropFileNameW[i];
Drop_file_name[i] = 0;
}
}
free(ShortDropFileNameW);
}
}
} }
} }
} }