Vendor things

third-party/vendor/wayland-scanner/src/util.rs

@@ -0,0 +1,68 @@
+use proc_macro2::{Ident, Literal, Span, TokenStream};
+use quote::ToTokens;
+
+pub fn is_keyword(txt: &str) -> bool {
+    match txt {
+        "abstract" | "alignof" | "as" | "become" | "box" | "break" | "const" | "continue"
+        | "crate" | "do" | "else" | "enum" | "extern" | "false" | "final" | "fn" | "for" | "if"
+        | "impl" | "in" | "let" | "loop" | "macro" | "match" | "mod" | "move" | "mut"
+        | "offsetof" | "override" | "priv" | "proc" | "pub" | "pure" | "ref" | "return"
+        | "Self" | "self" | "sizeof" | "static" | "struct" | "super" | "trait" | "true"
+        | "type" | "typeof" | "unsafe" | "unsized" | "use" | "virtual" | "where" | "while"
+        | "yield" | "__handler" | "__object" => true,
+        _ => false,
+    }
+}
+
+pub fn is_camel_keyword(txt: &str) -> bool {
+    match txt {
+        "Self" => true,
+        _ => false,
+    }
+}
+
+pub fn snake_to_camel(input: &str) -> String {
+    let result = input
+        .split('_')
+        .flat_map(|s| {
+            let mut first = true;
+            s.chars().map(move |c| {
+                if first {
+                    first = false;
+                    c.to_ascii_uppercase()
+                } else {
+                    c
+                }
+            })
+        })
+        .collect::<String>();
+
+    if is_camel_keyword(&result) {
+        format!("_{}", &result)
+    } else {
+        result
+    }
+}
+
+pub fn dotted_to_relname(input: &str) -> TokenStream {
+    let mut it = input.split('.');
+    match (it.next(), it.next()) {
+        (Some(module), Some(name)) => {
+            let module = Ident::new(module, Span::call_site());
+            let ident = Ident::new(&snake_to_camel(name), Span::call_site());
+            quote::quote!(super::#module::#ident)
+        }
+        (Some(name), None) => {
+            Ident::new(&snake_to_camel(name), Span::call_site()).into_token_stream()
+        }
+        _ => unreachable!(),
+    }
+}
+
+pub fn null_terminated_byte_string_literal(string: &str) -> Literal {
+    let mut val = Vec::with_capacity(string.len() + 1);
+    val.extend_from_slice(string.as_bytes());
+    val.push(0);
+
+    Literal::byte_string(&val)
+}