/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2019 Joyent, Inc.
 * Copyright 2021 Jason King
 */

#ifndef _RUST_H
#define _RUST_H

#include <errno.h>
#include <sys/types.h>
#include "demangle-sys.h"
#include "demangle_int.h"
#include "strview.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef enum rustenc_version {
        RUSTENC_LEGACY = -1,
        RUSTENC_V0 = 0
} rustenc_version_t;

typedef struct rust_state {
        const char      *rs_str; /* The original string */
        custr_t         *rs_demangled;
        sysdem_ops_t    *rs_ops;
        custr_alloc_t   rs_cualloc;
        strview_t       rs_orig; /* strview of original string, sans prefix */
        int             rs_error;
        rustenc_version_t rs_encver;
        uint64_t        rs_lt_depth;
        boolean_t       rs_skip;
        boolean_t       rs_args_stay_open;
        boolean_t       rs_args_is_open;
        boolean_t       rs_verbose;
        boolean_t       rs_show_const_type;
        boolean_t       rs_isutf8;
} rust_state_t;
#define HAS_ERROR(_st) ((_st)->rs_error != 0)
#define SET_ERROR(_st) ((_st)->rs_error = errno)

/*
 * In certain circumstances, we need to parse an item, but not emit any
 * output. These macros assist in that. To use:
 *
 * rust_state_t *st;
 * boolean_t saved_state;
 * ...
 * SKIP_BEGIN(st, saved_state);
 * ... stuff to no emit
 * SKIP_END(st, saved_state);
 */
#define SKIP_BEGIN(_st, _save)          \
        (_save) = (_st)->rs_skip,       \
        (_st)->rs_skip = B_TRUE
#define SKIP_END(_st, _n) (_st)->rs_skip = (_n)

boolean_t rust_appendc(rust_state_t *, char);
boolean_t rust_append(rust_state_t *, const char *);
boolean_t rust_append_printf(rust_state_t *, const char *, ...) __PRINTFLIKE(2);
boolean_t rust_append_sv(rust_state_t *restrict, uint64_t, strview_t *restrict);
boolean_t rust_append_utf8_c(rust_state_t *, uint32_t);
boolean_t rust_parse_base10(rust_state_t *restrict, strview_t *restrict,
    uint64_t *restrict);
boolean_t rust_demangle_legacy(rust_state_t *restrict, strview_t *restrict);
boolean_t rust_demangle_v0(rust_state_t *restrict, strview_t *restrict);

boolean_t rustv0_puny_decode(rust_state_t *restrict, strview_t *restrict,
    boolean_t);

#ifdef __cplusplus
}
#endif

#endif /* _RUST_H */