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/* sbc_harness/ihex.h - Intel Hex decoder
*
* Copyright (C) 2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
/* https://archive.org/details/IntelHEXStandard */
#ifndef _SBC_HARNESS_IHEX_H_
#define _SBC_HARNESS_IHEX_H_
#include <stdbool.h> /* for bool */
#include <stddef.h> /* for size_t */
#include <stdint.h> /* for uint{n}_t */
#include <libhw/generic/io.h>
#include <libmisc/private.h>
struct ihex_decoder {
void *handle_arg;
error (*handle_data)(void *arg, uint32_t off, uint8_t count, uint8_t *dat);
error (*handle_set_exec_start_seg)(void *arg, uint16_t cs, uint16_t ip);
error (*handle_set_exec_start_lin)(void *arg, uint32_t eip);
error (*handle_eof)(void *arg);
BEGIN_PRIVATE(IHEX_H);
bool seen_eof;
error sticky_err;
/* ihex_decoder_write: deal with ASCII soup */
bool in_record;
char buf_char; /* the first nibble of a byte (still in ASCII) */
/* ihex_decode_byte: build records from decoded bytes */
/* The currently-being-decoded record, after hex decoding. */
uint16_t buf_len;
uint8_t buf[0xFF+5];
/* ihex_handle_record: handle record semantics */
enum { _IHEX_MODE_NONE, _IHEX_MODE_SEG, _IHEX_MODE_LIN } addr_mode;
uint32_t addr_base;
END_PRIVATE(IHEX_H);
};
LO_IMPLEMENTATION_H(io_writer, struct ihex_decoder, ihex_decoder);
LO_IMPLEMENTATION_H(io_closer, struct ihex_decoder, ihex_decoder);
#endif /* _SBC_HARNESS_IHEX_H_ */
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