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fixed bug #1946112 - Wrong free space calculation

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git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@5638 212acab6-be3b-0410-9dea-997c60f758d6
This commit is contained in:
kichik 2008-05-10 10:42:24 +00:00
parent be25de5c8d
commit 931beb47e1
1 changed files with 39 additions and 9 deletions
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48
Source/exehead/Ui.c
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@ -982,7 +982,7 @@ static BOOL CALLBACK DirProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPar
if (uMsg == WM_IN_UPDATEMSG || uMsg == WM_NOTIFY_START)
{
static char s[NSIS_MAX_STRLEN];
char *p;
char *root;
int error = 0;
int available_set = 0;
unsigned total, available = 0xFFFFFFFF;
@ -991,10 +991,24 @@ static BOOL CALLBACK DirProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPar
if (!is_valid_instpath(dir))
error = NSIS_INSTDIR_INVALID;
/**
* This part is tricky. We need to make sure a few things:
*
* 1. GetDiskFreeSpaceEx is always called at least once for large HD.
* Even if skip_root() returned NULL (e.g. "C:").
* Note that trimslashtoend() will nullify "C:".
* 2. GetDiskFreeSpaceEx is called with the deepest valid directory.
* e.g. C:\drive when the user types C:\drive\folder1\folder2.
* This makes sure NTFS mount points are treated properly (#1946112).
* 3. `s' stays valid after the loop for GetDiskFreeSpace.
* This means there is no cutting beyond what skip_root() returns.
* 4. If GetDiskFreeSpaceEx doesn't exist, GetDiskFreeSpace is used.
* 5. `dir' is never modified.
*
*/
mystrcpy(s,dir);
p=skip_root(s);
if (p)
*p=0;
root=skip_root(s);
// Test for and use the GetDiskFreeSpaceEx API
{
@ -1004,22 +1018,38 @@ static BOOL CALLBACK DirProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPar
{
ULARGE_INTEGER available64;
ULARGE_INTEGER a, b;
if (GDFSE(s, &available64, &a, &b))
char *p;
for (p = s; root != p; p = trimslashtoend(s))
{
if (GDFSE(s, &available64, &a, &b))
{
#ifndef _NSIS_NO_INT64_SHR
available = (int)(available64.QuadPart >> 10);
available = (int)(available64.QuadPart >> 10);
#else
available = (int)(Int64ShrlMod32(available64.QuadPart, 10));
available = (int)(Int64ShrlMod32(available64.QuadPart, 10));
#endif
available_set++;
available_set++;
break;
}
if (!root)
{
// don't call trimslashtoend() which will destroy the string
break;
}
}
}
}
if (!available_set)
{
// GetDiskFreeSpaceEx is not available
DWORD spc, bps, fc, tc;
// GetDiskFreeSpaceEx accepts any path, but GetDiskFreeSpace accepts only the root
if (root)
*root=0;
// GetDiskFreeSpaceEx is not available
if (GetDiskFreeSpace(s, &spc, &bps, &fc, &tc))
{
available = (int)MulDiv(bps * spc, fc, 1 << 10);