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48 lines
818 B
48 lines
818 B
4 years ago
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#![allow(unused_macros)]
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pub const GENERIC_ERROR: i32 = -1;
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pub const GENERIC_SUCCESS: i32 = 0;
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macro_rules! c_try {
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($e:expr) => {
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match $e {
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Ok(v) => v,
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Err(e) => return i32::from(e),
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}
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}
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}
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macro_rules! no_unwind {
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(try $t:expr; $($e:tt)*) => {
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{
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match std::panic::catch_unwind(|| {
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$($e)*
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}) {
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Ok(v) => i32::from(v),
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Err(_) => return i32::from($t),
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}
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}
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};
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($($e:tt)*) => {
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no_unwind! {try $crate::ffi::GENERIC_ERROR; $($e)*}
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}
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}
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macro_rules! string_from_ffi {
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($file:expr) => {
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unsafe {
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let file = $file;
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if file.is_null() {
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return $crate::ffi::GENERIC_ERROR;
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}
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let file = CStr::from_ptr(file);
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match file.to_str() {
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Ok(file) => file.to_owned(),
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Err(_) => return $crate::ffi::GENERIC_ERROR,
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}
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}
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}
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}
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