wip: temporary give back ProgramFilesDir

cli/src/host.rs

@@ -152,6 +152,7 @@ impl win32::Host for EnvRef {
 
     fn set_current_dir(&self, path: &WindowsPath) -> Result<(), u32> {
         let path = windows_to_host_path(path);
+        log::info!("set_current_dir {:?}", path);
         std::env::set_current_dir(path).map_err(|e| io_error_to_win32(&e))
     }
 

win32/src/winapi/advapi32.rs

@@ -1,10 +1,14 @@
 #![allow(non_snake_case)]
 
+use memory::ExtensionsMut;
+
 use super::types::Str16;
 use crate::machine::Machine;
 
 const TRACE_CONTEXT: &'static str = "advapi32";
 
+const REG_SZ: u32 = 0x00000001; // A string.
+
 pub type HKEY = u32;
 
 #[win32_derive::dllexport]
@@ -40,14 +44,42 @@ pub fn RegCloseKey(_machine: &mut Machine, hKey: HKEY) -> u32 {
 
 #[win32_derive::dllexport]
 pub fn RegQueryValueExA(
-    _machine: &mut Machine,
+    machine: &mut Machine,
     hKey: HKEY,
     lpValueName: Option<&str>,
     lpReserved: u32,
     lpType: Option<&mut u32>,
     lpData: u32,
     lpcbData: Option<&mut u32>,
 ) -> u32 {
+    if matches!(lpValueName, Some("ProgramFilesDir")) {
+        // const PROGRAM_FILES: &str = "C:\\Program Files";
+        const PROGRAM_FILES: &str = "C:\\Users\\linus\\Program Files";
+
+        if let Some(lpType) = lpType {
+            *lpType = REG_SZ;
+        }
+
+        if lpData != 0 {
+            let in_out_len = lpcbData.unwrap();
+
+            if *in_out_len <= PROGRAM_FILES.len() as u32 {
+                return 234; // ERROR_MORE_DATA
+            }
+
+            *in_out_len = (PROGRAM_FILES.len() as u32) + 1;
+
+            let buf = machine.mem().sub32_mut(lpData, *in_out_len);
+
+            buf[..PROGRAM_FILES.len()].copy_from_slice(PROGRAM_FILES.as_bytes());
+            buf[PROGRAM_FILES.len()] = 0;
+        } else if let Some(lpcbData) = lpcbData {
+            *lpcbData = (PROGRAM_FILES.len() as u32) + 1;
+        }
+
+        return 0;
+    }
+
     2 // ERROR_FILE_NOT_FOUND
 }