System plugin

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@1130 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/System/Buffers.c

@@ -0,0 +1,93 @@
+#include "stdafx.h"
+#include "Plugin.h"
+#include "System.h"
+#include "Buffers.h"
+
+PLUGINFUNCTION(AllocCopy)
+	int mem;
+
+	if (popint(&mem) == 0)
+	{
+		pushint(0);
+		return;
+	}
+
+	mem = (int) GlobalCopy((HANDLE) mem);
+	pushint(mem);
+PLUGINFUNCTIONEND
+
+PLUGINFUNCTION(Alloc)
+	int size;
+	int mem;
+
+	if (popint(&size) == 0)
+	{
+		pushint(0);
+		return;
+	}
+
+	mem = (int) GlobalAlloc(GPTR, size);
+	pushint(mem);
+PLUGINFUNCTIONEND
+
+PLUGINFUNCTION(Free)
+	int mem;
+
+	if ((popint(&mem) == 0) || (mem == 0))
+	{
+		pushstring("false");
+		return;
+	}
+	if ((GlobalFree((HANDLE) mem) == NULL)) pushstring("true");
+	else pushstring("false");
+PLUGINFUNCTIONEND
+
+/*typedef BOOL (__stdcall *GetDiskSpace)
+(
+  LPCTSTR lpDirectoryName,                 // directory name
+  PULARGE_INTEGER lpFreeBytesAvailable,    // bytes available to caller
+  PULARGE_INTEGER lpTotalNumberOfBytes,    // bytes on disk
+  PULARGE_INTEGER lpTotalNumberOfFreeBytes // free bytes on disk
+);*/
+
+/*PLUGINFUNCTION(MyFunction)
+		GetDiskSpace proc;
+		ULARGE_INTEGER i1, i2, i3;
+		BOOL check;
+
+		proc = (GetDiskSpace) GetProcAddress(GetModuleHandle("kernel32.dll"), "GetDiskFreeSpaceExA");
+		check = proc(NULL, &i1, &i2, &i3);
+
+        _asm
+        {
+                push    ecx
+                lea             ecx, i3
+                push    ecx
+                lea             ecx, i2
+                push    ecx
+                lea             ecx, i1
+                push    ecx
+                push    0
+
+                call    proc
+
+				mov				check, eax
+//                add             esp, 16
+                pop             ecx
+        }
+
+	char buf[1024];
+    wsprintf(buf,"$0=%s\n",getuservariable(INST_0));
+    MessageBox(g_hwndParent,buf,0,MB_OK);
+PLUGINFUNCTIONEND*/
+
+HANDLE GlobalCopy(HANDLE Old)
+{
+	SIZE_T size;
+	HANDLE n;
+
+	size = GlobalSize(Old);
+	n = GlobalAlloc(GPTR, size);
+	CopyMemory(n, Old, size);
+	return n;
+}