/*
** mruby/dump.h - mruby binary dumper (mrbc binary format)
**
** See Copyright Notice in mruby.h
*/

#ifndef MRUBY_DUMP_H
#define MRUBY_DUMP_H

#if defined(__cplusplus)
extern "C" {
#endif

#include "mruby.h"

#ifdef ENABLE_STDIO
int mrb_dump_irep_binary(mrb_state*, size_t, int, FILE*);
int mrb_dump_irep_cfunc(mrb_state *mrb, size_t n, int, FILE *f, const char *initname);
int32_t mrb_read_irep_file(mrb_state*, FILE*);
#endif
int32_t mrb_read_irep(mrb_state*, const uint8_t*);

#ifdef ENABLE_STDIO
mrb_value mrb_load_irep_file(mrb_state*,FILE*);
#endif

/* dump/load error code
 *
 * NOTE: MRB_DUMP_GENERAL_FAILURE is caused by
 * unspecified issues like malloc failed.
 */
#define MRB_DUMP_OK                   0
#define MRB_DUMP_GENERAL_FAILURE      -1
#define MRB_DUMP_WRITE_FAULT          -2
#define MRB_DUMP_READ_FAULT           -3
#define MRB_DUMP_CRC_ERROR            -4
#define MRB_DUMP_INVALID_FILE_HEADER  -5
#define MRB_DUMP_INVALID_IREP         -6
#define MRB_DUMP_INVALID_ARGUMENT     -7

/* null symbol length */
#define MRB_DUMP_NULL_SYM_LEN         0xFFFF

/* Rite Binary File header */
#define RITE_BINARY_IDENFIFIER        "RITE"
#define RITE_BINARY_FORMAT_VER        "0001"
#define RITE_COMPILER_NAME            "MATZ"
#define RITE_COMPILER_VERSION         "0000"

#define RITE_VM_VER                   "0000"

#define RITE_BINARY_EOF               "END\0"
#define RITE_SECTION_IREP_IDENTIFIER  "IREP"
#define RITE_SECTION_LIENO_IDENTIFIER "LINE"

#define MRB_DUMP_DEFAULT_STR_LEN      128

// binary header
struct rite_binary_header {
  uint8_t binary_identify[4]; // Binary Identifier
  uint8_t binary_version[4];  // Binary Format Version
  uint8_t binary_crc[2];      // Binary CRC
  uint8_t binary_size[4];     // Binary Size
  uint8_t compiler_name[4];   // Compiler name
  uint8_t compiler_version[4];
};

// section header
#define RITE_SECTION_HEADER \
  uint8_t section_identify[4]; \
  uint8_t section_size[4]

struct rite_section_header {
  RITE_SECTION_HEADER;
};

struct rite_section_irep_header {
  RITE_SECTION_HEADER;

  uint8_t rite_version[4];    // Rite Instruction Specification Version
  uint8_t nirep[2];           // Number of ireps
  uint8_t sirep[2];           // Start index  
};

struct rite_section_lineno_header {
  RITE_SECTION_HEADER;

  uint8_t nirep[2];           // Number of ireps
  uint8_t sirep[2];           // Start index  
};

struct rite_binary_footer {
  RITE_SECTION_HEADER;
};

static inline int
uint8_to_bin(uint8_t s, uint8_t *bin)
{
  *bin = s;
  return sizeof(uint8_t);
}

static inline int
uint16_to_bin(uint16_t s, uint8_t *bin)
{
  *bin++ = (s >> 8) & 0xff;
  *bin   = s & 0xff;
  return sizeof(uint16_t);
}

static inline int
uint32_to_bin(uint32_t l, uint8_t *bin)
{
  *bin++ = (l >> 24) & 0xff;
  *bin++ = (l >> 16) & 0xff;
  *bin++ = (l >> 8) & 0xff;
  *bin   = l & 0xff;
  return sizeof(uint32_t);
}

static inline uint32_t
bin_to_uint32(const uint8_t *bin)
{
  return (uint32_t)bin[0] << 24 |
         (uint32_t)bin[1] << 16 |
         (uint32_t)bin[2] << 8  |
         (uint32_t)bin[3];
}

static inline uint16_t
bin_to_uint16(const uint8_t *bin)
{
  return (uint16_t)bin[0] << 8 |
         (uint16_t)bin[1];
}

static inline uint8_t
bin_to_uint8(const uint8_t *bin)
{
  return (uint8_t)bin[0];
}

/* crc.c */
uint16_t
calc_crc_16_ccitt(const uint8_t *src, size_t nbytes, uint16_t crc);
#if defined(__cplusplus)
}  /* extern "C" { */
#endif

#endif  /* MRUBY_DUMP_H */