pcsc,pcsc-sys: make ctl_code const fn

Author: unlimitedsola

pcsc-sys/src/lib.rs

@@ -302,11 +302,11 @@ pub const SCARD_ATTR_DEVICE_FRIENDLY_NAME: DWORD = SCARD_ATTR_DEVICE_FRIENDLY_NA
 pub const SCARD_ATTR_DEVICE_SYSTEM_NAME: DWORD = SCARD_ATTR_DEVICE_SYSTEM_NAME_A;
 
 #[cfg(target_os = "windows")]
-pub fn SCARD_CTL_CODE(code: DWORD) -> DWORD {
+pub const fn SCARD_CTL_CODE(code: DWORD) -> DWORD {
     0x0031_0000 | (code << 2)
 }
 #[cfg(not(target_os = "windows"))]
-pub fn SCARD_CTL_CODE(code: DWORD) -> DWORD {
+pub const fn SCARD_CTL_CODE(code: DWORD) -> DWORD {
     0x4200_0000 + code
 }
 

pcsc/src/lib.rs

@@ -583,7 +583,7 @@ pub fn PNP_NOTIFICATION() -> &'static CStr {
 /// to this function.
 ///
 /// This function wraps the `SCARD_CTL_CODE` macro.
-pub fn ctl_code(code: DWORD) -> DWORD {
+pub const fn ctl_code(code: DWORD) -> DWORD {
     ffi::SCARD_CTL_CODE(code)
 }