//
// Copyright (c) 2026 Jacob McDonnell
//
// SPDX-License-Identifier: BSD-2-Clause
//
#ifndef INCLUDE_MATFILE_H_
#define INCLUDE_MATFILE_H_

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>

typedef enum {
    miINT8   = 1,
    miUINT8  = 2,
    miINT16  = 3,
    miUINT16 = 4,
    miINT32  = 5,
    miUINT32 = 6,
    miSINGLE = 7,
    // 8 -- Reserved
    miDOUBLE = 9,
    // 10 -- Reserved
    // 11 -- Reserved
    miINT64      = 12,
    miUINT64     = 13,
    miMATRIX     = 14,
    miCOMPRESSED = 15,
    miUTF8       = 16,
    miUTF16      = 17,
    miUTF32      = 18
} mTypes_t;

typedef enum {
    mxCELL_CLASS   = 1,
    mxSTRUCT_CLASS = 2,
    mxOBJECT_CLASS = 3,
    mxCHAR_CLASS   = 4,
    mxSPARSE_CLASS = 5,
    mxDOUBLE_CLASS = 6,
    mxSINGLE_CLASS = 7,
    mxINT8_CLASS   = 8,
    mxUINT8_CLASS  = 9,
    mxINT16_CLASS  = 10,
    mxUINT16_CLASS = 11,
    mxINT32_CLASS  = 12,
    mxUINT32_CLASS = 13,
    mxINT64_CLASS  = 14,
    mxUINT64_CLASS = 15,
} mClasses_t;

typedef struct {
    char     description[116];
    uint32_t subsystem_offset_high;
    uint32_t subsystem_offset_low;
    uint16_t version;
    uint16_t endian_indicator;
} mHeader_t;

typedef struct {
    uint32_t type;
    uint32_t size;
} mTag_t;

typedef struct {
    uint16_t type;
    uint16_t size;
} mSmallTag_t;

typedef struct {
    mTag_t tag;
    void  *data;
} mData_t;

typedef struct {
    mSmallTag_t tag;
    uint32_t    data;
} mSmallData_t;

typedef struct {
    uint8_t class;
    struct {
        uint8_t unused1 : 1;
        uint8_t logical : 1;
        uint8_t global  : 1;
        uint8_t complex : 1;
        uint8_t unused2 : 4;
    };
    uint16_t unused3;
    uint32_t unused0;
} mArrayFlags_t;

bool write_header(FILE *file);
bool write_data(FILE *file, mData_t data);
bool write_small_data(FILE *file, mSmallData_t data);

#endif  // INCLUDE_MATFILE_H_