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diff --git a/inflateMark.3 b/inflateMark.3 new file mode 100644 index 00000000..2d15993d --- /dev/null +++ b/inflateMark.3 @@ -0,0 +1,88 @@ +.Dd January 15, 2017 +.Dt INFLATEMARK 3 +.Os +. +.Sh NAME +.Nm inflateMark +.Nd mark location for random access +. +.Sh LIBRARY +.Lb libz +. +.Sh SYNOPSIS +.In zlib.h +.Ft long +.Fn inflateMark "z_streamp strm" +. +.Sh DESCRIPTION +This function returns two values, +one in the lower 16 bits of the return value, +and the other in the remaining upper bits, +obtained by shifting the return value down 16 bits. +If the upper value is -1 +and the lower value is zero, +then +.Xr inflate 3 +is currently decoding information outside of a block. +If the upper value is -1 +and the lower value is non-zero, +then +.Xr inflate 3 +is in the middle of a stored block, +with the lower value equaling +the number of bytes from the input remaining to copy. +If the upper value is not -1, +then it is the number of bits +back from the current bit position +in the input of the code +(literal of length/distance pair) +currently being processed. +In that case the lower value +is the number of bytes +already emitted for that code. +. +.Pp +A code is being processed if +.Xr inflate 3 +is waiting for more input to complete +decoding of the code, +or if it has completed decoding +but is waiting for more output space +to write the literal or match data. +. +.Pp +.Fn inflateMark +is used to mark locations in the input data +for random access, +which may be at bit positions, +and to note those cases where +the output of a code may span boundaries +of random access blocks. +The current location in the input stream +can be determined from +.Fa avail_in +and +.Fa data_type +as noted in the description for the +.Dv Z_BLOCK +.Fa flush +parameter for +.Xr inflate 3 . +. +.Sh RETURN VALUES +.Fn inflateMark +returns the value noted above, +or -65536 if the provided source stream state was inconsistent. +. +.Sh SEE ALSO +.Xr inflate 3 +. +.Sh HISTORY +This manual page was converted from +.In zlib.h +to mdoc format by +.An C. 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 |