Expand description
C FFI - va_list support
This crate provides an interface for rust code to read values passed in C’s va_list type.
§Example
In C Code
#include <stdint.h>
#include <stdarg.h>
extern void print_ints_va(uint32_t count, va_list args);
extern void print_ints(uint32_t count, ...)
{
va_list args;
va_start(args, count);
print_ints_va(count, args);
va_end(args);
}
In rust code:
extern crate va_list;
#[no_mangle]
extern "C" fn print_ints_va(count: u32, mut args: va_list::VaList)
{
unsafe {
for i in (0 .. count) {
println!("{}: {}", i, args.get::<i32>());
}
}
}
Structs§
- VaList
- Rust version of C’s
va_list
type from thestdarg.h
header
Traits§
- VaPrimitive
- Trait implemented on types that can be read from a va_list