#include <stdint.h>

// byteswappings

#define SWAP16(x) ({ uint16_t y=(x); (((y)>>8 & 0xff) | ((y)<<8 & 0xff00)); })
#define SWAP32(x) ({ uint32_t y=(x); (((y)>>24 & 0xfful) | ((y)>>8 & 0xff00ul) | ((y)<<8 & 0xff0000ul) | ((y)<<24 & 0xff000000ul)); })

// little endian config
#define HOST2LE32(x) (x)
#define HOST2BE32(x) SWAP32(x)
#define LE2HOST32(x) (x)
#define BE2HOST32(x) SWAP32(x)

#define HOST2LE16(x) (x)
#define HOST2BE16(x) SWAP16(x)
#define LE2HOST16(x) (x)
#define BE2HOST16(x) SWAP16(x)

#define GETLEs16(X) ((int16_t)GETLE16((uint16_t *)X))
#define GETLEs32(X) ((int16_t)GETLE32((uint16_t *)X))

#define GETLE16(X) LE2HOST16(*(uint16_t *)X)
#define GETLE32(X) LE2HOST32(*(uint32_t *)X)
#define GETLE16D(X) ({uint32_t val = GETLE32(X); (val<<16 | val >> 16);})
#define PUTLE16(X, Y) do{*((uint16_t *)X)=HOST2LE16((uint16_t)Y);}while(0)
#define PUTLE32(X, Y) do{*((uint32_t *)X)=HOST2LE16((uint32_t)Y);}while(0)