Added _windows.go extensions to all the files in preparation for the library writing.

1 files changed, 73 insertions, 0 deletions

diff --git a/common_windows.go b/common_windows.go
new file mode 100644
index 0000000..79d6fc9
--- /dev/null
+++ b/common_windows.go
@@ -0,0 +1,73 @@
+// 7 february 2014
+package main
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// TODO filter out commctrl.h stuff because the combobox and listbox stuff has values that differ between windows versions and bleh
+// either that or switch to ComboBoxEx and ListView because they might not have that problem???
+
+var (
+	user32 = syscall.NewLazyDLL("user32.dll")
+	kernel32 = syscall.NewLazyDLL("kernel32.dll")
+	gdi32 = syscall.NewLazyDLL("gdi32.dll")
+)
+
+type HANDLE uintptr
+type HWND HANDLE
+type HBRUSH HANDLE
+type HMENU HANDLE
+
+const (
+	NULL = 0
+	FALSE = 0			// from windef.h
+	TRUE = 1			// from windef.h
+)
+
+type ATOM uint16
+
+// TODO pull the thanks for these three from the old wingo source
+// TODO put these in windows.go
+type WPARAM uintptr
+type LPARAM uintptr
+type LRESULT uintptr
+
+func (w WPARAM) LOWORD() uint16 {
+	// according to windef.h
+	return uint16(w & 0xFFFF)
+}
+
+func (w WPARAM) HIWORD() uint16 {
+	// according to windef.h
+	return uint16((w >> 16) & 0xFFFF)
+}
+
+func LPARAMFromString(str string) LPARAM {
+	return LPARAM(unsafe.Pointer(syscall.StringToUTF16Ptr(str)))
+}
+
+// microsoft's header files do this
+func MAKEINTRESOURCE(what uint16) uintptr {
+	return uintptr(what)
+}
+
+// TODO adorn error messages with which step failed?
+func getText(hwnd HWND) (text string, err error) {
+	var tc []uint16
+
+	length, err := SendMessage(hwnd, WM_GETTEXTLENGTH, 0, 0)
+	if err != nil {
+		return "", err
+	}
+	tc = make([]uint16, length + 1)
+	_, err = SendMessage(hwnd,
+		WM_GETTEXT,
+		WPARAM(length + 1),
+		LPARAM(unsafe.Pointer(&tc[0])))
+	if err != nil {
+		return "", err
+	}
+	return syscall.UTF16ToString(tc), nil
+}