runtime/klee-libc/htonl.c


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//===-- htonl.c -----------------------------------------------------------===//
//
//                     The KLEE Symbolic Virtual Machine
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include <sys/types.h>
#include <sys/param.h>
#include <stdint.h>

#undef htons
#undef htonl
#undef ntohs
#undef ntohl

// Make sure we can recognize the endianness.
#if (!defined(BYTE_ORDER) || !defined(BIG_ENDIAN) || !defined(LITTLE_ENDIAN))
#error "Unknown platform endianness!"
#endif

#if BYTE_ORDER == LITTLE_ENDIAN

uint16_t htons(uint16_t v) {
  return (v >> 8) | (v << 8);
}
uint32_t htonl(uint32_t v) {
  return htons(v >> 16) | (htons((uint16_t) v) << 16);
}

#else

uint16_t htons(uint16_t v) {
  return v;
}
uint32_t htonl(uint32_t v) {
  return v;
}

#endif

uint16_t ntohs(uint32_t v) {
  return htons(v);
}
uint32_t ntohl(uint32_t v) {
  return htonl(v);
}