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/*=============================================================================
This file is the part of wordaccess.h for use under these
conditions:
* GCC (>=3.4), GLIBC
* 32 bit Little-Endian machines (intel MPUs 80386, Pentium, etc.)
* Other non-Big-Endian machines (very rare)
=============================================================================*/
typedef uint32_t wordint;
typedef unsigned char wordintBytes[sizeof(wordint)];
#include <sys/types.h>
#include <netinet/in.h>
/*
Here we use the more widely used functions htonl and ntohl instead of
bswap_32. This makes possible the handling of weird byte ordering
(neither Big-Endian nor Little-Endian) schemes, if any.
*/
static __inline__ wordint
bytesToWordint(wordintBytes const bytes) {
return (wordint) ntohl(*(wordint *)bytes);
}
static __inline__ void
wordintToBytes(wordintBytes * const bytesP,
wordint const wordInt) {
*(wordint *)bytesP = htonl(wordInt);
}
static __inline__ unsigned int
wordintClz(wordint const x) {
/* Find the data type closest to 32 bits, and file off any extra. */
if (x == 0)
return sizeof(wordint) * 8;
else if (sizeof(int) >= 4)
return __builtin_clz((int)x << (sizeof(int) - 4) * 8);
else if (sizeof(long int) >= 4)
return __builtin_clzl((long int)x << (sizeof(long int) - 4) * 8);
else
pm_error("Long int is less than 32 bits on this machine");
}
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