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Document all the hash and checksum functions.

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Dag-Erling Smørgrav 2016-09-17 17:30:13 +02:00
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3
lib/hash/Makefile.am
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@ -13,5 +13,8 @@ libcryb_hash_la_SOURCES = \
cryb_hash.c
dist_man3_MANS = \
cryb_adler32.3 \
cryb_fletcher.3 \
cryb_pearson.3 \
\
cryb_hash.3

78
lib/hash/cryb_adler32.3 Normal file
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@ -0,0 +1,78 @@
.\"-
.\" Copyright (c) 2015-2016 Universitetet i Oslo
.\" Copyright (c) 2016 Dag-Erling Smørgrav
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. The name of the author may not be used to endorse or promote
.\" products derived from this software without specific prior written
.\" permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd January 8, 2016
.Dt CRYB_ADLER32 3
.Os
.Sh NAME
.Nm cryb_adler32_hash
.Nd hash functions
.Sh LIBRARY
.Lb libcryb-hash
.Sh SYNOPSIS
.In stddef.h
.In stdint.h
.In cryb/hash.h
.Ft uint32_t
.Fn cryb_adler32_hash "const void *data" "size_t len"
.Sh DESCRIPTION
The
.Fn cryb_adler32_hash
function returns a 32-bit checksum of the
.Va len
first bytes of the object pointed to by
.Va data
using the Adler-32 algorithm described in RFC 1950.
.Pp
Unlike the Pearson hash implemented by
.Fn cryb_pearson_hash
or cryptographic message digests such as the SHA family, these
checksums are suitable for error detection.
.Sh IMPLEMENTATION NOTES
The
.In cryb/hash.h
header provides macros which allows these functions to be referred to
without their
.Dq Li cryb_
prefix.
.Sh SEE ALSO
.Xr cryb_hash 3
.Sh REFERENCES
.Rs
.%A "Deutsch, P."
.%A "Gailly, J.-L."
.%D "May 1996"
.%R "ZLIB Compressed Data Format Specification version 3.3"
.%O "RFC 1950"
.Re
.Sh AUTHORS
The
.Fn cryb_adler32_hash
function and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq Mt des@des.no .

5
lib/hash/cryb_fletcher.3
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@ -37,6 +37,7 @@
.Sh LIBRARY
.Lb libcryb-hash
.Sh SYNOPSIS
.In stddef.h
.In stdint.h
.In cryb/hash.h
.Ft uint16_t
@ -57,7 +58,7 @@ first bytes of the object pointed to by
.Va data .
.Pp
Unlike the Pearson hash implemented by
.Fn cryb_hash
.Fn cryb_pearson_hash
or cryptographic message digests such as the SHA family, these
checksums are suitable for error detection.
.Sh IMPLEMENTATION NOTES
@ -72,7 +73,7 @@ caller should take care to either pad the input or truncate the
argument before calling the checksum function.
.Sh SEE ALSO
.Xr cryb_hash 3
.\".Sh REFERENCES
.Sh STANDARDS
.Rs
.%A "Fletcher, John G."
.%D "January 1982"

82
lib/hash/cryb_hash.3
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@ -1,5 +1,5 @@
.\"-
.\" Copyright (c) 2015-2016 Universitetet i Oslo
.\" Copyright (c) 2016 Dag-Erling Smørgrav
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@ -26,55 +26,67 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd January 8, 2016
.Dd September 17, 2016
.Dt CRYB_HASH 3
.Os
.Sh NAME
.Nm cryb_hash ,
.Nm cryb_strhash
.Nd hash functions
.Nm cryb_hash_version ,
.Nm cryb_adler32_hash ,
.Nm cryb_fletcher16_hash ,
.Nm cryb_fletcher32_hash ,
.Nm cryb_fletcher64_hash ,
.Nm cryb_pearson_hash ,
.Nm cryb_pearson_hash_str
.Nd hash and checksum functions
.Sh LIBRARY
.Lb libcryb-hash
.Sh SYNOPSIS
.In stddef.h
.In stdint.h
.In cryb/hash.h
.Ft const char *
.Fn cryb_hash_version "void"
.Ft uint32_t
.Fn cryb_adler32_hash "const void *data" "size_t len"
.Ft uint16_t
.Fn fletcher16_hash "const void *data" "size_t len"
.Ft uint32_t
.Fn fletcher32_hash "const void *data" "size_t len"
.Ft uint64_t
.Fn fletcher64_hash "const void *data" "size_t len"
.Ft uint8_t
.Fn cryb_hash "const void *data" "size_t len"
.Fn cryb_pearson_hash "const void *data" "size_t len"
.Ft uint8_t
.Fn cryb_strhash "const char *str"
.Fn cryb_pearson_hash_str "const char *str"
.Sh DESCRIPTION
The
.Fn cryb_hash
function returns an 8-bit hash of the
.Va len
first bytes of the object pointed to by
.Va data .
.Fn cryb_hash_version
function returns a pointer to a string containing the specific version
of the
.Lb libcryb-hash
library.
.Pp
The
.Fn cryb_strhash
function returns an 8-bit hash of the NUL-terminated string pointed to
by
.Va str ,
not including the terminating NUL.
It is equivalent to calling
.Li cryb_hash(str, strlen(str)) .
For descriptions of the other functions in this library, see their
respective manual pages.
.Sh SEE ALSO
.Xr cryb_sha1 3
.Sh REFERENCES
.Rs
.%A "Pearson, Peter K."
.%D "June 1990"
.%T "Fast Hashing of Variable-Length Text Strings"
.%J "Communications of the ACM"
.%V "33"
.%N "6"
.%P "677"
.%O "doi:10.1145/78973.78978"
.Re
.Xr cryb_adler32 3 ,
.Xr cryb_fletcher 3 ,
.Xr cryb_pearson 3
.Sh AUTHORS
The
.Fn cryb_hash
.Fn cryb_hash_version ,
.Fn cryb_adler32_hash ,
.Fn cryb_fletcher16 ,
.Fn cryb_fletcher32
and
.Fn cryb_strhash
functions and this manual page were written for the University of Oslo by
.Fn cryb_fletcher64
functions and corresponding manual pages were written by
.An Dag-Erling Sm\(/orgrav Aq Mt des@des.no .
.Pp
The
.Fn cryb_pearson_hash
and
.Fn cryb_pearson_hash_str
functions and corresponding manual pages were written for the
University of Oslo by
.An Dag-Erling Sm\(/orgrav Aq Mt d.e.smorgrav@usit.uio.no .

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lib/hash/cryb_pearson.3 Normal file
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@ -0,0 +1,89 @@
.\"-
.\" Copyright (c) 2015-2016 Universitetet i Oslo
.\" Copyright (c) 2016 Dag-Erling Smørgrav
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. The name of the author may not be used to endorse or promote
.\" products derived from this software without specific prior written
.\" permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd September 17, 2016
.Dt CRYB_PEARSON_HASH 3
.Os
.Sh NAME
.Nm cryb_pearson_hash ,
.Nm cryb_pearson_hash_str
.Nd hash functions
.Sh LIBRARY
.Lb libcryb-hash
.Sh SYNOPSIS
.In stddef.h
.In stdint.h
.In cryb/hash.h
.Ft uint8_t
.Fn cryb_pearson_hash "const void *data" "size_t len"
.Ft uint8_t
.Fn cryb_pearson_hash_str "const char *str"
.Sh DESCRIPTION
The
.Fn cryb_pearson_hash
function returns an 8-bit hash of the
.Va len
first bytes of the object pointed to by
.Va data .
.Pp
The
.Fn cryb_pearson_hash_str
function returns an 8-bit hash of the NUL-terminated string pointed to
by
.Va str ,
not including the terminating NUL.
It is equivalent to calling
.Li cryb_pearson_hash(str, strlen(str)) .
.Sh IMPLEMENTATION NOTES
The
.In cryb/hash.h
header provides macros which allows these functions to be referred to
without their
.Dq Li cryb_
prefix.
.Sh SEE ALSO
.Xr cryb_hash 3
.Sh STANDARDS
.Rs
.%A "Pearson, Peter K."
.%D "June 1990"
.%T "Fast Hashing of Variable-Length Text Strings"
.%J "Communications of the ACM"
.%V "33"
.%N "6"
.%P "677"
.%O "doi:10.1145/78973.78978"
.Re
.Sh AUTHORS
The
.Fn cryb_pearson_hash
and
.Fn cryb_pearson_hash_str
functions and this manual page were written for the University of Oslo by
.An Dag-Erling Sm\(/orgrav Aq Mt d.e.smorgrav@usit.uio.no .