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Geoff suggested a more succinct description for "top".

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This commit is contained in:
Ulf Möller 2003-11-07 01:33:00 +00:00
parent e6e81c5894
commit d18b993c43
1 changed files with 6 additions and 6 deletions
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12
doc/crypto/bn_internal.pod
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@ -72,19 +72,19 @@ applications.
typedef struct bignum_st
{
int top; /* index of last used d (most significant word) + 1 */
BN_ULONG *d; /* pointer to an array of 'BITS2' bit chunks */
int top; /* number of words used in d */
BN_ULONG *d; /* pointer to an array containing the integer value */
int max; /* size of the d array */
int neg; /* sign */
} BIGNUM;
The big number is stored in B<d>, a malloc()ed array of B<BN_ULONG>s,
least significant first. A B<BN_ULONG> can be either 16, 32 or 64 bits
in size (B<BITS2>), depending on the 'number of bits' specified in
The integer value is stored in B<d>, a malloc()ed array of words (B<BN_ULONG>),
least significant word first. A B<BN_ULONG> can be either 16, 32 or 64 bits
in size, depending on the 'number of bits' (B<BITS2>) specified in
C<openssl/bn.h>.
B<max> is the size of the B<d> array that has been allocated. B<top>
is the 'last' entry being used plus one, so for a value of 4, bn.d[0]=4 and
is the number of words being used, so for a value of 4, bn.d[0]=4 and
bn.top=1. B<neg> is 1 if the number is negative. When a B<BIGNUM> is
B<0>, the B<d> field can be B<NULL> and B<top> == B<0>.