53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
|
#ifndef UNS_FORMAT_C89_H
|
||
|
|
#define UNS_FORMAT_C89_H
|
||
|
|
/* Copyright (C) 2024 Peter McGoron
|
||
|
|
*
|
||
|
|
* This program is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as
|
||
|
|
* published by the Free Software Foundation, either version 3 of the
|
||
|
|
* License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with this program. If not, see
|
||
|
|
* <https://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "uns.h"
|
||
|
|
|
||
|
|
/* This is a strictly C89+ header format with relocation pointers and
|
||
|
|
* lengths.
|
||
|
|
*
|
||
|
|
* Forwarding pointers need to be stored in the header because in strict
|
||
|
|
* C, arithmetic on pointers is undefined for pointers not pointing into
|
||
|
|
* the same object.
|
||
|
|
*
|
||
|
|
* The length of the string is limited to "len" bytes and is stored as
|
||
|
|
* a `uns_sword`. If the word is negative, then the region is a record,
|
||
|
|
* and if the number is positive then the region is just bytes.
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct uns_c89_relo_hdr {
|
||
|
|
void *relo;
|
||
|
|
uns_sword len;
|
||
|
|
};
|
||
|
|
#define uns_c89_relo_get_hdr(p)((struct uns_c89_relo_hdr *)(p) - 1)
|
||
|
|
|
||
|
|
size_t uns_c89_relo_get_len(void *p);
|
||
|
|
size_t uns_c89_relo_get_record_len(void *p);
|
||
|
|
|
||
|
|
#define uns_c89_relo_get_relo(p) (uns_c89_relo_get_hdr(p)->relo)
|
||
|
|
#define uns_c89_relo_set_relo(p, v) (uns_c89_relo_get_relo(p) = (v))
|
||
|
|
#define uns_c89_relo_is_record(p) (uns_c89_relo_get_hdr(p)->len < 0)
|
||
|
|
|
||
|
|
void *uns_c89_relo_init(void *p, size_t len_size, int is_record);
|
||
|
|
|
||
|
|
void uns_c89_relo_record_set(void *rec, size_t i, void *v);
|
||
|
|
void *uns_c89_relo_record_get(void *rec, size_t i);
|
||
|
|
|
||
|
|
#endif
|