Struct lua_patterns::LuaPatternBuilder

pub struct LuaPatternBuilder { /* private fields */ }

Build a byte Lua pattern, optionally escaping ‘magic’ characters

Implementations

impl LuaPatternBuilder

pub fn new() -> LuaPatternBuilder

Create a new Lua pattern builder

pub fn text(&mut self, s: &str) -> &mut Self

Add unescaped characters from a string

let patt = lua_patterns::LuaPatternBuilder::new()
    .text("(boo)")
    .build();
assert_eq!(std::str::from_utf8(&patt).unwrap(), "(boo)");

pub fn text_lines(&mut self, lines: &str) -> &mut Self

Add unescaped characters from lines

This looks for first non-whitespace run in each line, useful for spreading patterns out and commmenting them. Works with patterns that use ‘%s’ religiously!

let patt = lua_patterns::LuaPatternBuilder::new()
    .text_lines("
      hello-dolly
      you-are-fine  # comment
      cool
     ")
    .build();
assert_eq!(std::str::from_utf8(&patt).unwrap(),
  "hello-dollyyou-are-finecool");

pub fn bytes(&mut self, b: &[u8]) -> &mut Self

Add escaped bytes from a slice

let patt = lua_patterns::LuaPatternBuilder::new()
    .text("^")
    .bytes(b"^") // magic character!
    .build();
assert_eq!(std::str::from_utf8(&patt).unwrap(), "^%^");

pub fn bytes_as_hex(&mut self, bs: &str) -> &mut Self

Add escaped bytes from hex string

This consists of adjacent pairs of hex digits.

let patt = lua_patterns::LuaPatternBuilder::new()
    .text("^")
    .bytes_as_hex("5E") // which is ASCII '^'
    .build();
assert_eq!(std::str::from_utf8(&patt).unwrap(), "^%^");

pub fn build(&mut self) -> Vec<u8>

Create the pattern

pub fn hex_to_bytes(s: &str) -> Vec<u8>

Utility to create a vector of bytes from a hex string

let bb = lua_patterns::LuaPatternBuilder::hex_to_bytes("AEFE00FE");
assert_eq!(bb, &[0xAE,0xFE,0x00,0xFE]);

pub fn bytes_to_hex(s: &[u8]) -> String

Utility to create a hex string from a slice of bytes

let hex = lua_patterns::LuaPatternBuilder::bytes_to_hex(&[0xAE,0xFE,0x00,0xFE]);
assert_eq!(hex,"AEFE00FE");