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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26818 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2010-03-04 14:20:49 +00:00
parent 6bec06674c
commit ef7d0431a0
1 changed files with 14 additions and 0 deletions
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14
bignum.c
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@ -308,6 +308,19 @@ rb_int2inum(SIGNED_VALUE n)
# error unexpected SIZEOF_LONG : SIZEOF_BDIGITS ratio
#endif
/*
* buf is an array of long integers.
* buf is ordered from least significant word to most significant word.
* buf[0] is the least significant word and
* buf[num_longs-1] is the most significant word.
* This means words in buf is little endian.
* However each word in buf is native endian.
* (buf[i]&1) is the least significant bit and
* (buf[i]&(1<<(SIZEOF_LONG*CHAR_BIT-1))) is the most significant bit
* for each 0 <= i < num_longs.
* So buf is little endian at whole on a little endian machine.
* But buf is mixed endian on a big endian machine.
*/
void
rb_big_pack(VALUE val, unsigned long *buf, long num_longs)
{
@ -349,6 +362,7 @@ rb_big_pack(VALUE val, unsigned long *buf, long num_longs)
}
}
/* See rb_big_pack comment for endianness of buf. */
VALUE
rb_big_unpack(unsigned long *buf, long num_longs)
{