#![doc = include_str!("../readme.md")]
#![no_std]

/// Defines an external function to import.
#[cfg(all(windows, target_arch = "x86"))]
#[macro_export]
macro_rules! link {
    ($library:literal $abi:literal $($link_name:literal)? fn $($function:tt)*) => (
        #[link(name = $library, kind = "raw-dylib", modifiers = "+verbatim", import_name_type = "undecorated")]
        extern $abi {
            $(#[link_name=$link_name])?
            pub fn $($function)*;
        }
    )
}

/// Defines an external function to import.
#[cfg(all(windows, not(target_arch = "x86"), not(target_vendor = "win7")))]
#[macro_export]
macro_rules! link {
    ($library:literal $abi:literal $($link_name:literal)? fn $($function:tt)*) => (
        #[link(name = $library, kind = "raw-dylib", modifiers = "+verbatim")]
        extern $abi {
            $(#[link_name=$link_name])?
            pub fn $($function)*;
        }
    )
}

/// Defines an external function to import.
#[cfg(not(windows))]
#[macro_export]
macro_rules! link {
    ($library:literal $abi:literal $($link_name:literal)? fn $($function:tt)*) => (
        extern $abi {
            pub fn $($function)*;
        }
    )
}

// VectorCraft compatibility patch: windows-sys 0.61.2 binds CoTaskMemFree to
// combase.dll (Windows 8+). The same API is exported by ole32.dll on Windows 7.
// Redirect only this known API; leave every other binding unchanged.
#[cfg(all(windows, not(target_arch = "x86"), target_vendor = "win7"))]
#[macro_export]
macro_rules! link {
    ("combase.dll" $abi:literal fn CoTaskMemFree $($signature:tt)*) => (
        $crate::link!("ole32.dll" $abi fn CoTaskMemFree $($signature)*);
    );
    ($library:literal $abi:literal $($link_name:literal)? fn $($function:tt)*) => (
        #[link(name = $library, kind = "raw-dylib", modifiers = "+verbatim")]
        extern $abi {
            $(#[link_name=$link_name])?
            pub fn $($function)*;
        }
    )
}