Add macro to define a function and type alias with fake calling convention attributes per platform
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@ -22,6 +22,60 @@ macro_rules! __vtable_offset {
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};
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}
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#[macro_export]
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/// Common pattern for detouring.
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/// # Example
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/// ```norun
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/// __callingconv_func! {
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/// #[win32 = "stdcall"]
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/// #[win64 = "stdcall"]
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/// #[linux32 = "C"]
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/// #[linux64 = "C"]
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/// CVoiceGameMgrHelper_CanPlayerHearPlayer = extern fn(listener: *mut c_void, talker: *mut c_void) -> bool {
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/// println!("listener {:?} talker {:?}", listener, talker);
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/// false
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/// }
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/// }
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/// ```
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macro_rules! __callingconv_func {
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{ @callingconv $ty:ident = extern $callingconv:tt fn($($ident:ident: $arg:ty),*) $(-> $rtn:ty)? $code:block } => {
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type $ty = extern $callingconv fn($($ident: $arg),*) $(-> $rtn)?;
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extern $callingconv fn $ty($($ident: $arg),*) $(-> $rtn)? $code
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};
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{ @callingconv $ty:ident = extern $callingconv:tt fn($($ident:ident: $arg:ty),*) $(-> $rtn:ty)? } => {
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type $ty = extern $callingconv fn($($ident: $arg),*) $(-> $rtn)?;
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};
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{ #[win32 = $win32:tt] #[win64 = $win64:tt] #[linux32 = $linux32:tt] #[linux64 = $linux64:tt] $ty:ident = extern fn($($ident:ident: $arg:ty),*) $(-> $rtn:ty)? $code:block } => {
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#[cfg(all(target_os = "windows", target_pointer_width = "32"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $win32 fn($($ident: $arg),*) $(-> $rtn)? $code }
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#[cfg(all(target_os = "windows", target_pointer_width = "64"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $win64 fn($($ident: $arg),*) $(-> $rtn)? $code }
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#[cfg(all(target_os = "linux", target_pointer_width = "32"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $linux32 fn($($ident: $arg),*) $(-> $rtn)? $code }
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#[cfg(all(target_os = "linux", target_pointer_width = "64"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $linux64 fn($($ident: $arg),*) $(-> $rtn)? $code }
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};
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{ #[win32 = $win32:tt] #[win64 = $win64:tt] #[linux32 = $linux32:tt] #[linux64 = $linux64:tt] $ty:ident = extern fn($($ident:ident: $arg:ty),*) $(-> $rtn:ty)? } => {
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#[cfg(all(target_os = "windows", target_pointer_width = "32"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $win32 fn($($ident: $arg),*) $(-> $rtn)? }
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#[cfg(all(target_os = "windows", target_pointer_width = "64"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $win64 fn($($ident: $arg),*) $(-> $rtn)? }
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#[cfg(all(target_os = "linux", target_pointer_width = "32"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $linux32 fn($($ident: $arg),*) $(-> $rtn)? }
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#[cfg(all(target_os = "linux", target_pointer_width = "64"))]
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$crate::__callingconv_func! { @callingconv $ty = extern $linux64 fn($($ident: $arg),*) $(-> $rtn)? }
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};
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}
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#[macro_export]
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/// Common pattern for detouring.
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macro_rules! __gmod_func {
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