#include "ram.h"

#define TARGET_ENDIAN __ORDER_LITTLE_ENDIAN__

uint8_t ram__read_memory8(void * data, uint32_t address)
{
  uint8_t * mem = (uint8_t *)data;
  return mem[address];
}

uint16_t ram__read_memory16(void * data, uint32_t address)
{
  uint16_t * mem = (uint16_t *)data;
  uint16_t value = mem[address >> 1];
#if __BYTE_ORDER__ == TARGET_ENDIAN
  return value;
#else
  return __builtin_bswap16(value);
#endif
}

uint32_t ram__read_memory32(void * data, uint32_t address)
{
  uint32_t * mem = (uint32_t *)data;
  uint32_t value = mem[address >> 2];
#if __BYTE_ORDER__ == TARGET_ENDIAN
  return value;
#else
  return __builtin_bswap32(value);
#endif
}

void ram__write_memory8(void * data, uint32_t address, uint8_t value)
{
  uint8_t * mem = (uint8_t *)data;
  mem[address] = value;
}

void ram__write_memory16(void * data, uint32_t address, uint16_t value)
{
  uint16_t * mem = (uint16_t *)data;
#if __BYTE_ORDER__ != TARGET_ENDIAN
  value = __builtin_bswap16(value);
#endif
  mem[address >> 1] = value;
}

void ram__write_memory32(void * data, uint32_t address, uint32_t value)
{
  uint32_t * mem = (uint32_t *)data;
#if __BYTE_ORDER__ != TARGET_ENDIAN
  value = __builtin_bswap32(value);
#endif
  mem[address >> 2] = value;
}

struct memory_access ram__memory_access = {
  .read_memory8 = &ram__read_memory8,
  .read_memory16 = &ram__read_memory16,
  .read_memory32 = &ram__read_memory32,
  .write_memory8 = &ram__write_memory8,
  .write_memory16 = &ram__write_memory16,
  .write_memory32 = &ram__write_memory32
};