Struct wasmprinter::Printer

pub struct Printer { /* fields omitted */ }

Context used for printing a WebAssembly binary.

This is largely only required if you’d like to register custom printers for custom sections in a wasm binary.

Implementations

impl Printer

pub fn new() -> Printer

Creates a new Printer object that’s ready to start printing wasm binaries to strings.

pub fn add_custom_section_printer(
    &mut self,
    section: &str,
    printer: impl FnMut(&mut Printer, usize, &[u8]) -> Result<()> + 'static
)

Registers a custom printer function to get invoked whenever a custom section of name section is seen.

This can be used to register printers into a textual format for custom sections, such as by emitting annotations and/or other textual references (maybe coments!)

By default all custom sections are ignored for the text format.

The printer function provided takes three arguments:

• A &mut Printer, or where to print results to
• A usize offset which is the start of the offset for the custom section
• A byte slice which is the actual contents of the custom section.

pub fn result_mut(&mut self) -> &mut String

Gets the output result of this Printer, or where all output is going.

pub fn print(&mut self, wasm: &[u8]) -> Result<String>

Prints a WebAssembly binary into a String

This function takes an entire wasm binary blob and will print it to the WebAssembly Text Format and return the result as a String.

pub fn print_func_idx(&mut self, idx: u32) -> Result<()>

Prints a function index specified, using the identifier for the function from the name section if it was present.

This will either print $foo or idx as a raw integer.

Trait Implementations

impl Default for Printer

fn default() -> Printer

Returns the “default value” for a type.