Add win32.get_cwd to return the current working directory

core/strings/strings.odin

@@ -329,6 +329,10 @@ is_space :: proc(r: rune) -> bool {
 	return false;
 }
 
+is_null :: proc(r: rune) -> bool {
+	return r == 0x0000;
+}
+
 index_proc :: proc(s: string, p: proc(rune) -> bool, truth := true) -> int {
 	for r, i in s {
 		if p(r) == truth {
@@ -476,3 +480,16 @@ trim_right_space :: proc(s: string) -> string {
 trim_space :: proc(s: string) -> string {
 	return trim_right_space(trim_left_space(s));
 }
+
+trim_left_null :: proc(s: string) -> string {
+	return trim_left_proc(s, is_null);
+}
+
+trim_right_null :: proc(s: string) -> string {
+	return trim_right_proc(s, is_null);
+}
+
+trim_null :: proc(s: string) -> string {
+	return trim_right_null(trim_left_null(s));
+}
+

core/sys/win32/crt.odin

@@ -0,0 +1,14 @@
+package win32
+
+import "core:strings";
+
+foreign {
+	@(link_name="_wgetcwd") _get_cwd_wide :: proc(buffer: Wstring, buf_len: int) ->  ^Wstring ---
+}
+
+get_cwd :: proc(allocator := context.temp_allocator) -> string {
+	buffer := make([]u16, MAX_PATH_WIDE, allocator);
+	_get_cwd_wide(Wstring(&buffer[0]), MAX_PATH_WIDE);
+	file := ucs2_to_utf8(buffer[:], allocator);
+	return strings.trim_right_null(file);
+}

core/sys/win32/general.odin

@@ -108,6 +108,8 @@ File_Attribute_Data :: struct {
 	file_size_low:    u32,
 }
 
+// NOTE(Jeroen): The widechar version might want at least the 32k MAX_PATH_WIDE
+// https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-findfirstfilew#parameters
 Find_Data_W :: struct{
     file_attributes:     u32,
     creation_time:       Filetime,
@@ -798,6 +800,7 @@ is_key_down :: inline proc(key: Key_Code) -> bool { return get_async_key_state(i
 
 
 MAX_PATH :: 0x00000104;
+MAX_PATH_WIDE :: 0x8000;
 
 HANDLE_FLAG_INHERIT :: 1;
 HANDLE_FLAG_PROTECT_FROM_CLOSE :: 2;