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| -rw-r--r-- | doc/zlib/adler32_combine.3 | 63 |
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diff --git a/doc/zlib/adler32_combine.3 b/doc/zlib/adler32_combine.3 new file mode 100644 index 00000000..55e801e9 --- /dev/null +++ b/doc/zlib/adler32_combine.3 @@ -0,0 +1,63 @@ +.Dd January 15, 2017 +.Dt ADLER32_COMBINE 3 +.Os +. +.Sh NAME +.Nm adler32_combine +.Nd combine Adler-32 checksums +. +.Sh LIBRARY +.Lb libz +. +.Sh SYNOPSIS +.In zlib.h +.Ft uLong +.Fn adler32_combine "uLong adler1" "uLong adler2" "z_off_t len2" +. +.Sh DESCRIPTION +Combine two Adler-32 checksums into one. +For two sequences of bytes, +.Va seq1 +and +.Va seq2 +with lengths +.Va len1 +and +.Va len2 , +Adler-32 checksums were calculated for each, +.Va adler1 +and +.Va adler2 . +.Fn adler32_combine +returns the Adler-32 checksum of +.Va seq1 +and +.Va seq2 +concatenated, +requiring only +.Fa adler1 , +.Fa adler2 , +and +.Fa len2 . +Note that the +.Vt z_off_t +type +.Pq like Vt off_t +is a signed integer. +If +.Fa len2 +is negative, +the result has no meaning or utility. +. +.Sh SEE ALSO +.Xr adler32 3 +. +.Sh HISTORY +This manual page was converted from +.In zlib.h +to mdoc format by +.An June McEnroe Aq Mt june@causal.agency . +. +.Sh AUTHORS +.An Jean-loup Gailly Aq Mt jloup@gzip.org +.An Mark Adler Aq Mt madler@alumni.caltech.edu |