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#![allow(bad_style)]

extern crate libc;
use libc::*;

pub type rs_magic_number = c_int;
pub const RS_DELTA_MAGIC: c_int = 0x7273_0236;
pub const RS_MD4_SIG_MAGIC: c_int = 0x7273_0136;
pub const RS_BLAKE2_SIG_MAGIC: c_int = 0x7273_0137;

pub type rs_result = c_int;
pub const RS_DONE: c_int = 0;
pub const RS_BLOCKED: c_int = 1;
pub const RS_RUNNING: c_int = 2;
pub const RS_TEST_SKIPPED: c_int = 77;
pub const RS_IO_ERROR: c_int = 100;
pub const RS_SYNTAX_ERROR: c_int = 101;
pub const RS_MEM_ERROR: c_int = 102;
pub const RS_INPUT_ENDED: c_int = 103;
pub const RS_BAD_MAGIC: c_int = 104;
pub const RS_UNIMPLEMENTED: c_int = 105;
pub const RS_CORRUPT: c_int = 106;
pub const RS_INTERNAL_ERROR: c_int = 107;
pub const RS_PARAM_ERROR: c_int = 108;

pub type rs_loglevel = c_int;
pub const RS_LOG_EMERG: c_int = 0;
pub const RS_LOG_ALERT: c_int = 1;
pub const RS_LOG_CRIT: c_int = 2;
pub const RS_LOG_ERR: c_int = 3;
pub const RS_LOG_WARNING: c_int = 4;
pub const RS_LOG_NOTICE: c_int = 5;
pub const RS_LOG_INFO: c_int = 6;
pub const RS_LOG_DEBUG: c_int = 7;

pub const RS_DEFAULT_BLOCK_LEN: size_t = 2048;

pub type rs_long_t = c_longlong;

pub enum rs_job_t {}
pub enum rs_signature_t {}

#[repr(C)]
pub struct rs_buffers_t {
    pub next_in: *const c_char,
    pub avail_in: size_t,
    pub eof_in: c_int,
    pub next_out: *mut c_char,
    pub avail_out: size_t,
}

pub type rs_copy_cb = extern "C" fn(
    opaque: *mut c_void,
    pos: rs_long_t,
    len: *mut size_t,
    buf: *mut *mut c_void,
) -> rs_result;
pub type rs_trace_fn_t = extern "C" fn(level: rs_loglevel, msg: *const c_char);

extern "C" {
    pub fn rs_job_iter(job: *mut rs_job_t, buffers: *mut rs_buffers_t) -> rs_result;
    pub fn rs_job_free(job: *mut rs_job_t) -> rs_result;

    pub fn rs_sig_begin(
        new_block_len: size_t,
        strong_sum_len: size_t,
        sig_magic: rs_magic_number,
    ) -> *mut rs_job_t;
    pub fn rs_delta_begin(sig: *mut rs_signature_t) -> *mut rs_job_t;
    pub fn rs_loadsig_begin(sig: *mut *mut rs_signature_t) -> *mut rs_job_t;
    pub fn rs_build_hash_table(sums: *mut rs_signature_t) -> rs_result;
    pub fn rs_free_sumset(sums: *mut rs_signature_t);
    pub fn rs_patch_begin(copy_cb: rs_copy_cb, copy_arg: *mut c_void) -> *mut rs_job_t;

    pub fn rs_trace_set_level(level: rs_loglevel);
    pub fn rs_trace_to(f: rs_trace_fn_t);
}