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[dragonfly.git] / secure / lib / libcrypto / man / BN_add_word.3
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34'''
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36''' Set up \*(-- to give an unbreakable dash;
37''' string Tr holds user defined translation string.
38''' Bell System Logo is used as a dummy character.
39'''
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42.ds -- \(*W-
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48''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
49''' \*(L" and \*(R", except that they are used on ".xx" lines,
50''' such as .IP and .SH, which do another additional levels of
51''' double-quote interpretation
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64.ds -- \(em\|
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80.\" If the F register is turned on, we'll generate
81.\" index entries out stderr for the following things:
82.\" TH Title
83.\" SH Header
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96.TH BN_add_word 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
984263bc 99.if n .na
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188.\}
189.rm #[ #] #H #V #F C
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190.SH "NAME"
191BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word \- arithmetic
192functions on BIGNUMs with integers
193.SH "SYNOPSIS"
74dab6c2 194.PP
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195.Vb 1
196\& #include <openssl/bn.h>
197.Ve
198.Vb 1
199\& int BN_add_word(BIGNUM *a, BN_ULONG w);
200.Ve
201.Vb 1
202\& int BN_sub_word(BIGNUM *a, BN_ULONG w);
203.Ve
204.Vb 1
205\& int BN_mul_word(BIGNUM *a, BN_ULONG w);
206.Ve
207.Vb 1
208\& BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
209.Ve
210.Vb 1
211\& BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
212.Ve
213.SH "DESCRIPTION"
984263bc 214These functions perform arithmetic operations on BIGNUMs with unsigned
74dab6c2 215integers. They are much more efficient than the normal BIGNUM
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216arithmetic operations.
217.PP
74dab6c2 218\fIBN_add_word()\fR adds \fBw\fR to \fBa\fR (\f(CWa+=w\fR).
984263bc 219.PP
74dab6c2 220\fIBN_sub_word()\fR subtracts \fBw\fR from \fBa\fR (\f(CWa-=w\fR).
984263bc 221.PP
74dab6c2 222\fIBN_mul_word()\fR multiplies \fBa\fR and \fBw\fR (\f(CWa*=b\fR).
984263bc 223.PP
74dab6c2 224\fIBN_div_word()\fR divides \fBa\fR by \fBw\fR (\f(CWa/=w\fR) and returns the remainder.
984263bc 225.PP
74dab6c2 226\fIBN_mod_word()\fR returns the remainder of \fBa\fR divided by \fBw\fR (\f(CWa%m\fR).
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227.PP
228For \fIBN_div_word()\fR and \fIBN_mod_word()\fR, \fBw\fR must not be 0.
229.SH "RETURN VALUES"
74dab6c2 230\fIBN_add_word()\fR, \fIBN_sub_word()\fR and \fIBN_mul_word()\fR return 1 for success, 0
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231on error. The error codes can be obtained by ERR_get_error(3).
232.PP
74dab6c2 233\fIBN_mod_word()\fR and \fIBN_div_word()\fR return \fBa\fR%\fBw\fR.
984263bc 234.SH "SEE ALSO"
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235bn(3), ERR_get_error(3), BN_add(3)
236.SH "HISTORY"
74dab6c2 237\fIBN_add_word()\fR and \fIBN_mod_word()\fR are available in all versions of
984263bc 238SSLeay and OpenSSL. \fIBN_div_word()\fR was added in SSLeay 0.8, and
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239\fIBN_sub_word()\fR and \fIBN_mul_word()\fR in SSLeay 0.9.0.
240
241.rn }` ''
242.IX Title "BN_add_word 3"
243.IX Name "BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic
244functions on BIGNUMs with integers"
245
246.IX Header "NAME"
247
248.IX Header "SYNOPSIS"
249
250.IX Header "DESCRIPTION"
251
252.IX Header "RETURN VALUES"
253
254.IX Header "SEE ALSO"
255
256.IX Header "HISTORY"
257