feat: upgrade wfassoc_exec

wfassoc_cdylib/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "wfassoc_cdylib"
+version = "0.1.0"
+authors = ["yyc12345"]
+edition = "2024"
+description = "The dynamic wfassoc library exposed for C/C++ and other languages users."
+license = "SPDX:MIT"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+thiserror = { workspace = true }
+wfassoc = { path="../wfassoc" }
+
+[build-dependencies]
+cbindgen = "0.29.0"

wfassoc_cdylib/README.md

@@ -0,0 +1,5 @@
+# Wfassoc C/C++ Library
+
+For how to utilize this library, please see our example located in `example/ppic`. It is a Qt project built with CMake and demonstrate basically all usage of exposed functions in this dynamic library.
+
+All crucial spots are written in this example as the code comment so I don't write them in there again.

wfassoc_cdylib/src/last_error.rs

@@ -0,0 +1,58 @@
+//! When calling function with dynamic library,
+//! function return value indicates whether function has been successfully executed.
+//! When function return `false`, programmer may want to know which error occurs.
+//! 
+//! This module provide **thread independent** error message string storage,
+//! which is more like Win32 `GetLastError()` but return error message instead of error code.
+//! These module provided functions will be called when executing main module functions.
+
+use std::cell::RefCell;
+use std::ffi::{CString, c_char};
+
+struct LastError {
+    msg: CString,
+}
+
+impl LastError {
+    fn new() -> Self {
+        Self {
+            msg: CString::new("").expect("empty string must be valid for CString"),
+        }
+    }
+
+    pub fn set_msg(&mut self, msg: &str) {
+        self.msg = CString::new(msg).expect("unexpected blank in error message output");
+    }
+
+    pub fn get_msg(&self) -> *const c_char {
+        self.msg.as_ptr()
+    }
+
+    pub fn clear_msg(&mut self) {
+        self.msg = CString::new("").expect("empty string must be valid for CString");
+    }
+}
+
+thread_local! {
+    static LAST_ERROR: RefCell<LastError> = RefCell::new(LastError::new());
+}
+
+/// Set thread local error message.
+pub fn set_last_error(msg: &str) {
+    LAST_ERROR.with(|e| {
+        e.borrow_mut().set_msg(msg);
+    });
+}
+
+/// Get const pointer to thread local error message string.
+/// If there is no error, return pointer will point to empty string.
+pub fn get_last_error() -> *const c_char {
+    LAST_ERROR.with(|e| e.borrow().get_msg())
+}
+
+/// Clear thread local error message (reset to empty string).
+pub fn clear_last_error() {
+    LAST_ERROR.with(|e| {
+        e.borrow_mut().clear_msg();
+    });
+}

wfassoc_cdylib/src/lib.rs

@@ -0,0 +1,57 @@
+use std::cell::RefCell;
+use std::ffi::{CString, c_char};
+use thiserror::Error as TeError;
+
+mod last_error;
+mod string_cache;
+
+// region: Error
+
+/// Error occurs in this crate.
+#[derive(Debug, TeError)]
+enum Error {
+    /// Error occurs in wfassoc core.
+    #[error("{0}")]
+    Core(#[from] wfassoc::Error),
+
+    #[error("error occurs when parsing into C/C++ string")]
+    CastIntoCStr(#[from] std::ffi::NulError),
+    #[error("error occurs when parsing from C/C++ string")]
+    CastFromCStr(#[from] std::ffi::IntoStringError),
+}
+
+/// Result type used in this crate.
+type Result<T> = std::result::Result<T, Error>;
+
+// endregion
+
+// region: Macros
+
+
+// endregion
+
+#[unsafe(no_mangle)]
+pub extern "C" fn WFStartup() -> bool {
+    false
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn WFShutdown() -> bool {
+    false
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn WFGetLastError() -> *const c_char {
+    last_error::get_last_error()
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn WFHasPrivilege() -> bool {
+    wfassoc::utilities::has_privilege()
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn WFAdd(left: u32, right: u32, rv: *mut u32) -> bool {
+    unsafe { *rv = left + right; }
+    return true;
+}

wfassoc_cdylib/src/string_cache.rs

@@ -0,0 +1,52 @@
+//! When calling this dynamic library with outside programs,
+//! outer programs may usually need to fetch string resource produced by Rust code.
+//! However it is impossible pass Rust string directly to outer program.
+//! 
+//! This module provide **thread independent** string cache for resolving this issue.
+//! When we need pass string to outer programs, we push that string into this string as C-like format,
+//! then return its pointer to outer program.
+//! So that outside program can utilize it like calling C/C++ library.
+//! The only thing that outer programs should note is that this string is volatile,
+//! once they get it, they must dupliate it immediately before any futher calling to this dynamic library.
+use std::cell::RefCell;
+use std::ffi::{CString, c_char};
+
+struct StringCache {
+    msg: CString,
+}
+
+impl StringCache {
+    fn new() -> Self {
+        Self {
+            msg: CString::new("").expect("empty string must be valid for CString"),
+        }
+    }
+
+    pub fn set_msg(&mut self, msg: &str) {
+        self.msg = CString::new(msg).expect("unexpected blank in string push into string cache");
+    }
+
+    pub fn get_msg(&self) -> *const c_char {
+        self.msg.as_ptr()
+    }
+
+    pub fn clear_msg(&mut self) {
+        self.msg = CString::new("").expect("empty string must be valid for CString");
+    }
+}
+
+thread_local! {
+    static STRING_CACHE: RefCell<StringCache> = RefCell::new(StringCache::new());
+}
+
+/// Set thread local string cache.
+pub fn set_string_cache(msg: &str) {
+    STRING_CACHE.with(|e| {
+        e.borrow_mut().set_msg(msg);
+    });
+}
+
+/// Get const pointer to thread local string cache for outside program visiting.
+pub fn get_string_cache() -> *const c_char {
+    STRING_CACHE.with(|e| e.borrow().get_msg())
+}