removed local-only 'utils' dependency

- switched to the ´widestring´ crate for u16string support
- moved the error handling code from the utils crate to here.

Cargo.toml

@@ -7,8 +7,12 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-winapi = {version = "0.3.9" , features = ["libloaderapi", "dbghelp", "ntdef", "processthreadsapi"] }
-utils = { path = "../utils", features = ["win32-error"]}
+winapi = {version = "0.3.9" , features = ["libloaderapi", "dbghelp", "ntdef", "processthreadsapi", "winerror", "errhandlingapi", "winuser"] }
+widestring = "1.0.2"
 lazy_static = "1.0.0"
 thiserror = "1.0.0"
 log = "0.4.0"
+
+[dev-dependencies]
+test-log = "0.2"
+env_logger = "*"

src/lib.rs

@@ -11,7 +11,6 @@ use std::{
 
 use lazy_static::lazy_static;
 use log::error;
-use utils::{string::ToWide, win32::Win32Error};
 use winapi::{
     shared::ntdef::{HANDLE, ULONG},
     um::{
@@ -32,8 +31,8 @@ pub mod error {
         ImageHelpError(#[from] ImageHelpError),
         #[error(transparent)]
         NullError(#[from] NulError),
-        #[error(transparent)]
-        Win32Error(#[from] utils::win32::error::Win32Error),
+        #[error("win32 Error Code {0}")]
+        Win32Error(u32),
     }
 
     #[derive(Debug, thiserror::Error)]
@@ -41,6 +40,22 @@ pub mod error {
         #[error("Module could not be found")]
         ModuleNotFound,
     }
+
+    impl Error {
+        pub(crate) fn last_error() -> Self {
+            Self::Win32Error(unsafe { winapi::um::errhandlingapi::GetLastError() })
+        }
+    }
+
+    pub(crate) fn true_or_last_error<F>(f: F) -> Result<(), Error>
+    where
+        F: FnOnce() -> bool,
+    {
+        match f() {
+            true => Ok(()),
+            false => Err(Error::last_error()),
+        }
+    }
 }
 
 pub struct ImageHelp {
@@ -92,14 +107,14 @@ impl ImageHelp {
     ) -> Result<*const u8, error::Error> {
         let process_handle = self.process_handle.read().unwrap();
 
-        let module_name_w = module_name.to_wide_null();
+        let module_name_w = widestring::U16CString::from_str(module_name).expect("unexpected null");
 
         let module_handle = unsafe {
             let handle = LoadLibraryW(module_name_w.as_ptr());
 
             if handle == std::ptr::null_mut() {
                 error!("Module handle {} is NULL.", module_name);
-                Err(error::ImageHelpError::ModuleNotFound)
+                Err(error::Error::last_error())
             } else {
                 Ok(handle)
             }
@@ -121,7 +136,7 @@ impl ImageHelp {
 
         log::debug!("SymLoadModuleExW..");
 
-        match utils::win32::error::true_or_last_error(|| unsafe {
+        match error::true_or_last_error(|| unsafe {
             dbghelp::SymLoadModuleExW(
                 GetCurrentProcess(),
                 null_mut(),
@@ -134,7 +149,7 @@ impl ImageHelp {
             ) != 0
         }) {
             Ok(_) => Ok(()),
-            Err(Win32Error { error_code: 0 }) => {
+            Err(error::Error::Win32Error(0)) => {
                 log::debug!("Symbols already loaded.");
                 Ok(())
             }
@@ -146,12 +161,13 @@ impl ImageHelp {
                 unsafe { std::mem::MaybeUninit::<dbghelp::SYMBOL_INFOW>::zeroed().assume_init() };
             sym_info.SizeOfStruct = std::mem::size_of::<dbghelp::SYMBOL_INFOW>() as ULONG;
 
-            let symbol_name_utf16 = function_name.to_wide_null();
+            let symbol_name_utf16 =
+                widestring::U16CString::from_str(function_name).expect("unexpected null char");
             sym_info.MaxNameLen = 255;
 
             log::debug!("SymFromNameW..");
 
-            utils::win32::error::true_or_last_error(|| unsafe {
+            error::true_or_last_error(|| unsafe {
                 dbghelp::SymFromNameW(*process_handle, symbol_name_utf16.as_ptr(), &mut sym_info)
                     != 0
             })?;

src/tests.rs

@@ -1,6 +1,6 @@
 use super::*;
 
-#[test]
+#[test_log::test]
 fn find_message_box_procaddress() {
     let messagebox = ImageHelp::get()
         .find_function("User32.dll", "MessageBoxA")