summary refs log tree commit diff
path: root/doc
diff options
context:
space:
mode:
authorC. McEnroe <june@causal.agency>2020-12-27 22:11:35 -0500
committerC. McEnroe <june@causal.agency>2020-12-27 22:11:35 -0500
commit98ea1a27fc5e0377b13213e009f0c236f5fe73b4 (patch)
tree94c59aaaca157159510c1f81edba1d5e66cfdd64 /doc
parentAdd "this commit" option to switch form (diff)
parentReplace Makefile with portable one (diff)
downloadsrc-98ea1a27fc5e0377b13213e009f0c236f5fe73b4.tar.gz
src-98ea1a27fc5e0377b13213e009f0c236f5fe73b4.zip
Add 'doc/zlib/' from commit '38f010d3972db4262e7e0bcd7d6b9814f95d3538'
git-subtree-dir: doc/zlib
git-subtree-mainline: db652695744cc54584296b54289166b4b21ac407
git-subtree-split: 38f010d3972db4262e7e0bcd7d6b9814f95d3538
Diffstat (limited to 'doc')
-rw-r--r--doc/zlib/Makefile87
-rw-r--r--doc/zlib/adler32.365
-rw-r--r--doc/zlib/adler32_combine.363
-rw-r--r--doc/zlib/compress.384
-rw-r--r--doc/zlib/compressBound.344
-rw-r--r--doc/zlib/crc32.366
-rw-r--r--doc/zlib/crc32_combine.354
-rw-r--r--doc/zlib/deflate.3370
-rw-r--r--doc/zlib/deflateBound.371
-rw-r--r--doc/zlib/deflateCopy.366
-rw-r--r--doc/zlib/deflateEnd.350
-rw-r--r--doc/zlib/deflateGetDictionary.379
-rw-r--r--doc/zlib/deflateInit.3178
-rw-r--r--doc/zlib/deflateInit2.3227
-rw-r--r--doc/zlib/deflateParams.3123
-rw-r--r--doc/zlib/deflatePending.356
-rw-r--r--doc/zlib/deflatePrime.364
-rw-r--r--doc/zlib/deflateReset.357
-rw-r--r--doc/zlib/deflateSetDictionary.3142
-rw-r--r--doc/zlib/deflateSetHeader.3180
-rw-r--r--doc/zlib/deflateTune.370
-rw-r--r--doc/zlib/gzbuffer.359
-rw-r--r--doc/zlib/gzclose.397
-rw-r--r--doc/zlib/gzdirect.385
-rw-r--r--doc/zlib/gzeof.363
-rw-r--r--doc/zlib/gzerror.375
-rw-r--r--doc/zlib/gzflush.373
-rw-r--r--doc/zlib/gzfread.3107
-rw-r--r--doc/zlib/gzfwrite.375
-rw-r--r--doc/zlib/gzgetc.355
-rw-r--r--doc/zlib/gzgets.367
-rw-r--r--doc/zlib/gzoffset.351
-rw-r--r--doc/zlib/gzopen.3261
-rw-r--r--doc/zlib/gzprintf.371
-rw-r--r--doc/zlib/gzputc.343
-rw-r--r--doc/zlib/gzputs.341
-rw-r--r--doc/zlib/gzread.3115
-rw-r--r--doc/zlib/gzseek.3108
-rw-r--r--doc/zlib/gzsetparams.351
-rw-r--r--doc/zlib/gzungetc.367
-rw-r--r--doc/zlib/gzwrite.339
-rw-r--r--doc/zlib/inflate.3398
-rw-r--r--doc/zlib/inflateBack.3285
-rw-r--r--doc/zlib/inflateBackEnd.343
-rw-r--r--doc/zlib/inflateBackInit.384
-rw-r--r--doc/zlib/inflateCopy.359
-rw-r--r--doc/zlib/inflateEnd.344
-rw-r--r--doc/zlib/inflateGetDictionary.369
-rw-r--r--doc/zlib/inflateGetHeader.3170
-rw-r--r--doc/zlib/inflateInit.3101
-rw-r--r--doc/zlib/inflateInit2.3181
-rw-r--r--doc/zlib/inflateMark.388
-rw-r--r--doc/zlib/inflatePrime.373
-rw-r--r--doc/zlib/inflateReset.381
-rw-r--r--doc/zlib/inflateSetDictionary.385
-rw-r--r--doc/zlib/inflateSync.372
-rw-r--r--doc/zlib/uncompress.392
-rw-r--r--doc/zlib/zlibCompileFlags.3163
-rw-r--r--doc/zlib/zlibVersion.345
59 files changed, 5932 insertions, 0 deletions
diff --git a/doc/zlib/Makefile b/doc/zlib/Makefile
new file mode 100644
index 0000000..6cfd4a4
--- /dev/null
+++ b/doc/zlib/Makefile
@@ -0,0 +1,87 @@
+PREFIX ?= ~/.local
+MANDIR ?= ${PREFIX}/share/man
+
+MAN += adler32.3
+MAN += adler32_combine.3
+MAN += compress.3
+MAN += compressBound.3
+MAN += crc32.3
+MAN += crc32_combine.3
+MAN += deflate.3
+MAN += deflateBound.3
+MAN += deflateCopy.3
+MAN += deflateEnd.3
+MAN += deflateGetDictionary.3
+MAN += deflateInit.3
+MAN += deflateInit2.3
+MAN += deflateParams.3
+MAN += deflatePending.3
+MAN += deflatePrime.3
+MAN += deflateReset.3
+MAN += deflateSetDictionary.3
+MAN += deflateSetHeader.3
+MAN += deflateTune.3
+MAN += gzbuffer.3
+MAN += gzclose.3
+MAN += gzdirect.3
+MAN += gzeof.3
+MAN += gzerror.3
+MAN += gzflush.3
+MAN += gzfread.3
+MAN += gzfwrite.3
+MAN += gzgetc.3
+MAN += gzgets.3
+MAN += gzoffset.3
+MAN += gzopen.3
+MAN += gzprintf.3
+MAN += gzputc.3
+MAN += gzputs.3
+MAN += gzread.3
+MAN += gzseek.3
+MAN += gzsetparams.3
+MAN += gzungetc.3
+MAN += gzwrite.3
+MAN += inflate.3
+MAN += inflateBack.3
+MAN += inflateBackEnd.3
+MAN += inflateBackInit.3
+MAN += inflateCopy.3
+MAN += inflateEnd.3
+MAN += inflateGetDictionary.3
+MAN += inflateGetHeader.3
+MAN += inflateInit.3
+MAN += inflateInit2.3
+MAN += inflateMark.3
+MAN += inflatePrime.3
+MAN += inflateReset.3
+MAN += inflateSetDictionary.3
+MAN += inflateSync.3
+MAN += uncompress.3
+MAN += zlibCompileFlags.3
+MAN += zlibVersion.3
+
+MLINKS += adler32.3 adler32_z.3
+MLINKS += compress.3 compress2.3
+MLINKS += crc32.3 crc32_z.3
+MLINKS += gzclose.3 gzclose_r.3
+MLINKS += gzclose.3 gzclose_w.3
+MLINKS += gzerror.3 gzclearerr.3
+MLINKS += gzopen.3 gzdopen.3
+MLINKS += gzseek.3 gzrewind.3
+MLINKS += gzseek.3 gztell.3
+MLINKS += inflateReset.3 inflateReset2.3
+MLINKS += uncompress.3 uncompress2.3
+
+lint:
+	mandoc -T lint ${MAN} | grep -v 'referenced manual not found'
+
+install:
+	install -d ${MANDIR}/man3
+	install -m 644 ${MAN} ${MANDIR}/man3
+	set -- ${MLINKS}; while [ -n "$$*" ]; do \
+		ln -fs $$1 ${MANDIR}/man3/$$2; shift 2; done
+
+uninstall:
+	rm -f ${MAN:%=${MANDIR}/man3/%}
+	set -- ${MLINKS}; while [ -n "$$*" ]; do \
+		rm -f ${MANDIR}/man3/$$2; shift 2; done
diff --git a/doc/zlib/adler32.3 b/doc/zlib/adler32.3
new file mode 100644
index 0000000..d713d95
--- /dev/null
+++ b/doc/zlib/adler32.3
@@ -0,0 +1,65 @@
+.Dd January 15, 2017
+.Dt ADLER32 3
+.Os
+.
+.Sh NAME
+.Nm adler32 ,
+.Nm adler32_z
+.Nd update Adler-32 checksum
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn adler32 "uLong adler" "const Bytef *buf" "uInt len"
+.Ft uLong
+.Fn adler32_z "uLong adler" "const Bytef *buf" "z_size_t len"
+.
+.Sh DESCRIPTION
+Update a running Adler-32 checksum with the bytes
+.Fa "buf[0..len-1]"
+and return the updated checksum.
+If
+.Fa buf
+is
+.Dv Z_NULL ,
+this function returns
+the required initial value for the checksum.
+.
+.Pp
+An Adler-32 checksum is almost as reliable as a CRC-32
+but can be computed much faster.
+.
+.Pp
+.Fn adler32_z
+is the same as
+.Fn adler32 ,
+but with a
+.Vt size_t
+length.
+.
+.Sh EXAMPLES
+.Bd -literal -offset indent
+uLong adler = adler32(0L, Z_NULL, 0);
+
+while (read_buffer(buffer, length) != EOF) {
+	adler = adler32(adler, buffer, length);
+}
+if (adler != original_adler) error();
+.Ed
+.
+.Sh SEE ALSO
+.Xr adler32_combine 3 ,
+.Xr crc32 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
diff --git a/doc/zlib/adler32_combine.3 b/doc/zlib/adler32_combine.3
new file mode 100644
index 0000000..861f235
--- /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 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
diff --git a/doc/zlib/compress.3 b/doc/zlib/compress.3
new file mode 100644
index 0000000..22b229e
--- /dev/null
+++ b/doc/zlib/compress.3
@@ -0,0 +1,84 @@
+.Dd January 15, 2017
+.Dt COMPRESS 3
+.Os
+.
+.Sh NAME
+.Nm compress ,
+.Nm compress2
+.Nd compress source buffer into destination buffer
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.
+.Ft int
+.Fo compress
+.Fa "Bytef *dest"
+.Fa "uLongf *destLen"
+.Fa "const Bytef *source"
+.Fa "uLong sourceLen"
+.Fc
+.
+.Ft int
+.Fo compress2
+.Fa "Bytef *dest"
+.Fa "uLongf *destLen"
+.Fa "const Bytef *source"
+.Fa "uLong sourceLen"
+.Fa "int level"
+.Fc
+.
+.Sh DESCRIPTION
+Compresses the source buffer into the destination buffer.
+.Fa sourceLen
+is the byte length of the source buffer.
+Upon entry,
+.Fa destLen
+is the total size of the destination buffer,
+which must be at least the value returned by
+.Fn compressBound sourceLen .
+Upon exit,
+.Fa destLen
+is the actual size of the compressed data.
+.
+.Pp
+.Fn compress
+is equivalent to
+.Fn compress2
+with a
+.Fa level
+parameter of
+.Dv Z_DEFAULT_COMPRESSION .
+.
+.Sh RETURN VALUES
+.Fn compress
+and
+.Fn compress2
+return
+.Dv Z_OK
+on success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_BUF_ERROR
+if there was not enough room in the output buffer,
+.Dv Z_STREAM_ERROR
+if the
+.Fa level
+parameter is invalid.
+.
+.Sh SEE ALSO
+.Xr compressBound 3 ,
+.Xr deflateInit 3 ,
+.Xr uncompress 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
diff --git a/doc/zlib/compressBound.3 b/doc/zlib/compressBound.3
new file mode 100644
index 0000000..5800e2b
--- /dev/null
+++ b/doc/zlib/compressBound.3
@@ -0,0 +1,44 @@
+.Dd January 15, 2017
+.Dt COMPRESSBOUND 3
+.Os
+.
+.Sh NAME
+.Nm compressBound
+.Nd compressed size upper bound
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn compressBound "uLong sourceLen"
+.
+.Sh DESCRIPTION
+.Fn compressBound
+returns an upper bound on the compressed size after
+.Xr compress 3
+or
+.Xr compress2 3
+on
+.Fa sourceLen
+bytes.
+It would be used before a
+.Xr compress 3
+or
+.Xr compress2 3
+call to allocate the destination buffer.
+.
+.Sh SEE ALSO
+.Xr compress 3 ,
+.Xr deflateBound 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
diff --git a/doc/zlib/crc32.3 b/doc/zlib/crc32.3
new file mode 100644
index 0000000..3c9cc8c
--- /dev/null
+++ b/doc/zlib/crc32.3
@@ -0,0 +1,66 @@
+.Dd January 15, 2017
+.Dt CRC32 3
+.Os
+.
+.Sh NAME
+.Nm crc32 ,
+.Nm crc32_z
+.Nd update CRC-32 checksum
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn crc32 "uLong crc" "const Bytef *buf" "uInt len"
+.Ft uLong
+.Fn crc32_z "uLong crc" "const Bytef *buf" "z_size_t len"
+.
+.Sh DESCRIPTION
+Update a running CRC-32 with the bytes
+.Fa "buf[0..len-1]"
+and return the updated CRC-32.
+If
+.Fa buf
+is
+.Dv Z_NULL ,
+this function returns
+the required initial value for the CRC.
+Pre- and post-conditioning
+(one's complement)
+is performed within this function
+so it shouldn't be done
+by the application.
+.
+.Pp
+.Fn crc32_z
+is the same as
+.Fn crc32 ,
+but with a
+.Vt size_t
+length.
+.
+.Sh EXAMPLES
+.Bd -literal -offset indent
+uLong crc = crc32(0L, Z_NULL, 0);
+
+while (read_buffer(buffer, length) != EOF) {
+	crc = crc32(crc, buffer, length);
+}
+if (crc != original_crc) error();
+.Ed
+.
+.Sh SEE ALSO
+.Xr adler32 3 ,
+.Xr crc32_combine 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
diff --git a/doc/zlib/crc32_combine.3 b/doc/zlib/crc32_combine.3
new file mode 100644
index 0000000..2f79f62
--- /dev/null
+++ b/doc/zlib/crc32_combine.3
@@ -0,0 +1,54 @@
+.Dd January 15, 2017
+.Dt CRC32_COMBINE 3
+.Os
+.
+.Sh NAME
+.Nm crc32_combine
+.Nd combine CRC-32 checksums
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn crc32_combine "uLong crc1" "uLong crc2" "z_off_t len2"
+.
+.Sh DESCRIPTION
+Combine two CRC-32 check values into one.
+For two sequences of bytes,
+.Va seq1
+and
+.Va seq2
+with lengths
+.Va len1
+and
+.Va len2 ,
+CRC-32 check values were calculated for each,
+.Va crc1
+and
+.Va crc2 .
+.Fn crc32_combine
+returns the CRC-32 check value of
+.Va seq1
+and
+.Va seq2
+concatenated,
+requiring only
+.Fa crc1 ,
+.Fa crc2 ,
+and
+.Fa len2 .
+.
+.Sh SEE ALSO
+.Xr crc32 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
diff --git a/doc/zlib/deflate.3 b/doc/zlib/deflate.3
new file mode 100644
index 0000000..7df313e
--- /dev/null
+++ b/doc/zlib/deflate.3
@@ -0,0 +1,370 @@
+.Dd January 15, 2017
+.Dt DEFLATE 3
+.Os
+.
+.Sh NAME
+.Nm deflate
+.Nd deflate compression
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflate "z_streamp strm" "int flush"
+.
+.Sh DESCRIPTION
+.Fn deflate
+compresses as much data as possible,
+and stops when the input buffer becomes empty
+or the output buffer becomes full.
+It may introduce some output latency
+(reading input without producing any output)
+except when forced the flush.
+.
+.Pp
+The detailed semantics are as follows.
+.Fn deflate
+performs one or both of the following actions:
+.
+.Bl -dash
+.It
+Compress more input starting at
+.Fa next_in
+and update
+.Fa next_in
+and
+.Fa avail_in
+accordingly.
+If not all input can be processed
+(because there is not enough room in the output buffer),
+.Fa next_in
+and
+.Fa avail_in
+are updated
+and processing will resume at this point
+for the next call of
+.Fn deflate .
+.
+.It
+Generate more output starting at
+.Fa next_out
+and update
+.Fa next_out
+and
+.Fa avail_out
+accordingly.
+This action is forced if the parameter
+.Fa flush
+is non-zero.
+Forcing flush frequently degrades the compression ratio,
+so this parameter should be set only when necessary.
+Some output may be provided even if
+.Fa flush
+is zero.
+.El
+.
+.Pp
+Before the call of
+.Fn deflate ,
+the application should ensure that
+at least one of the actions is possible,
+by providing more input
+and/or consuming more output,
+and updating
+.Fa avail_in
+or
+.Fa avail_out
+accordingly;
+.Fa avail_out
+should never be zero before the call.
+The application can consume the compressed output
+when it wants,
+for example when the output buffer is full
+.Po
+.Fa avail_out
+== 0
+.Pc ,
+or after each call of
+.Fn deflate .
+If
+.Fn deflate
+returns
+.Dv Z_OK
+and with zero
+.Fa avail_out ,
+it must be called again after making room in the output buffer
+because there might be more output pending.
+See
+.Xr deflatePending 3 ,
+which can be used if desired to determine
+whether or not there is more output in that case.
+.
+.Pp
+Normally the parameter
+.Fa flush
+is set to
+.Dv Z_NO_FLUSH ,
+which allows
+.Fn deflate
+to decide how much data to accumulate before producing output,
+in order to maximize compression.
+.
+.Pp
+If the parameter
+.Fa flush
+is set to
+.Dv Z_SYNC_FLUSH ,
+all pending output is flushed to the output buffer
+and the output is aligned on a byte boundary,
+so that the decompressor can get all input data available so far.
+.Po
+In particular
+.Fa avail_in
+is zero after the call if enough output space
+has been provided before the call.
+.Pc \&
+Flushing may degrade compression for some compression algorithms
+and so it should be used only when necessary.
+This completes the current deflate block
+and follows it with an empty stored block
+that is three bits plus filler bits to the next byte,
+followed by four bytes
+(00 00 ff ff).
+.
+.Pp
+If
+.Fa flush
+is set to
+.Dv Z_PARTIAL_FLUSH ,
+all pending output is flushed to the output buffer,
+but the output is not aligned to a byte boundary.
+All of the input data so far will be available to the decompressor,
+as for
+.Dv Z_SYNC_FLUSH .
+This completes the current deflate block
+and follows it with an empty fixed codes block
+that is 10 bits long.
+This assures that enough bytes are output
+in order for the decompressor to finish the block
+before the empty fixed codes block.
+.
+.Pp
+If
+.Fa flush
+is set to
+.Dv Z_BLOCK ,
+a deflate block is completed and emitted,
+as for
+.Dv Z_SYNC_FLUSH ,
+but the output is not aligned on a byte boundary,
+and up to seven bits of the current block
+are held to be written as the next byte
+after the next deflate block is completed.
+In this case,
+the decompressor may not be provided enough bits
+at this point in order to complete decompression
+of the data provided so far to the compressor.
+It may need to wait for the next block to be emitted.
+This is for advanced applications
+that need to control the emission of deflate blocks.
+.
+.Pp
+If
+.Fa flush
+is set to
+.Dv Z_FULL_FLUSH ,
+all output is flushed as with
+.Dv Z_SYNC_FLUSH ,
+and the compression state is reset
+so that decompression can restart from this point
+if previous compressed data has been damaged
+or if random access is desired.
+Using
+.Dv Z_FULL_FLUSH
+too often can seriously degrade compression.
+.
+.Pp
+If
+.Fn deflate
+returns with
+.Fa avail_out
+== 0,
+this function must be called again
+with the same value of the
+.Fa flush
+parameter
+and more output space
+.Po
+updated
+.Fa avail_out
+.Pc ,
+until the flush is complete
+.Po
+.Fn deflate
+returns with non-zero
+.Fa avail_out
+.Pc .
+In the case of a
+.Dv Z_FULL_FLUSH
+or
+.Dv Z_SYNC_FLUSH ,
+make sure that
+.Fa avail_out
+is greater than six
+to avoid repeated flush markers
+due to
+.Fa avail_out
+== 0
+on return.
+.
+.Pp
+If the parameter
+.Fa flush
+is set to
+.Dv Z_FINISH ,
+pending input is processed,
+pending output is flushed and
+.Fn deflate
+returns with
+.Dv Z_STREAM_END
+if there was enough output space.
+If
+.Fn deflate
+returns with
+.Dv Z_OK
+or
+.Dv Z_BUF_ERROR ,
+this function must be called again with
+.Dv Z_FINISH
+and more output space
+.Pq updated Fa avail_out
+but no more input data,
+until it returns with
+.Dv Z_STREAM_END
+or an error.
+After
+.Fn deflate
+has returned
+.Dv Z_STREAM_END ,
+the only possible operations on the stream are
+.Xr deflateReset 3
+or
+.Xr deflateEnd 3 .
+.
+.Pp
+.Dv Z_FINISH
+can be used in the first
+.Fn deflate
+call after
+.Xr deflateInit 3
+if all the compression is to be done in a single step.
+In order to complete in one call,
+.Fa avail_out
+must be at least the value returned by
+.Xr deflateBound 3 .
+Then
+.Fn deflate
+is guaranteed to return
+.Dv Z_STREAM_END .
+If not enough output space is provided,
+.Fn deflate
+will not return
+.Dv Z_STREAM_END ,
+and it must be called again as described above.
+.
+.Pp
+.Fn deflate
+sets
+.Fa strm->adler
+to the Adler-32 checksum
+of all input read so far
+.Po
+that is,
+.Fa total_in
+bytes
+.Pc .
+If a gzip stream is being generated,
+then
+.Fa strm->adler
+will be the CRC-32 checksum of the input read so far.
+See
+.Xr deflateInit2 3 .
+.
+.Pp
+.Fn deflate
+may update
+.Fa strm->data_type
+if it can make a good guess
+about the input data type
+.Po
+.Dv Z_BINARY
+or
+.Dv Z_TEXT
+.Pc .
+If in doubt,
+the date is considered binary.
+This field is only for information purposes
+and does not affect the compression algorithm in any manner.
+.
+.Sh RETURN VALUES
+.Fn deflate
+returns
+.Dv Z_OK
+if some progress has been made
+(more input processed or more output produced),
+.Dv Z_STREAM_END
+if all input has been consumed
+and all output has been produced
+.Po
+only when
+.Fa flush
+is set to
+.Dv Z_FINISH
+.Pc ,
+.Dv Z_STREAM_ERROR
+if the stream state was inconsistent
+.Po
+for example if
+.Fa next_in
+or
+.Fa next_out
+was
+.Dv Z_NULL
+or the state was inadvertently written over
+by the application
+.Pc ,
+or
+.Dv Z_BUF_ERROR
+if no progress is possible
+.Po
+for example
+.Fa avail_in
+or
+.Fa avail_out
+was zero
+.Pc .
+Note that
+.Dv Z_BUF_ERROR
+is not fatal,
+and
+.Fn deflate
+can be called again with more input and more output space
+to continue compressing.
+.
+.Sh SEE ALSO
+.Xr deflateEnd 3 ,
+.Xr deflateInit 3 ,
+.Xr deflatePending 3 ,
+.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
diff --git a/doc/zlib/deflateBound.3 b/doc/zlib/deflateBound.3
new file mode 100644
index 0000000..63e8024
--- /dev/null
+++ b/doc/zlib/deflateBound.3
@@ -0,0 +1,71 @@
+.Dd January 15, 2017
+.Dt DEFLATEBOUND 3
+.Os
+.
+.Sh NAME
+.Nm deflateBound
+.Nd compressed size upper bound
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn deflateBound "z_streamp strm" "uLong sourceLen"
+.
+.Sh DESCRIPTION
+.Fn deflateBound
+returns an upper bound
+on the compressed size
+after deflation of
+.Fa sourceLen
+bytes.
+It must be called after
+.Xr deflateInit 3
+or
+.Xr deflateInit2 3 ,
+and after
+.Xr deflateSetHeader 3 ,
+if used.
+This would be used
+to allocate an output buffer
+for deflation in a single pass,
+and so would be called before
+.Xr deflate 3 .
+If that first
+.Fn deflate
+call is provided the
+.Fa sourceLen
+input bytes,
+an output buffer allocated
+to the size returned by
+.Fn deflateBound ,
+and the flush value
+.Dv Z_FINISH ,
+then
+.Fn deflate
+is guaranteed to return
+.Dv Z_STREAM_END .
+Note that it is possible
+for the compressed size
+to be larger than the value returned by
+.Fn deflateBound
+if flush options other than
+.Dv Z_FINISH
+or
+.Dv Z_NO_FLUSH
+are used.
+.
+.Sh SEE ALSO
+.Xr compressBound 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
diff --git a/doc/zlib/deflateCopy.3 b/doc/zlib/deflateCopy.3
new file mode 100644
index 0000000..f30d630
--- /dev/null
+++ b/doc/zlib/deflateCopy.3
@@ -0,0 +1,66 @@
+.Dd January 15, 2017
+.Dt DEFLATECOPY 3
+.Os
+.
+.Sh NAME
+.Nm deflateCopy
+.Nd copy deflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflateCopy "z_streamp dest" "z_streamp source"
+.
+.Sh DESCRIPTION
+Sets the destination stream
+as a complete copy of the source stream.
+.
+.Pp
+This function can be useful when
+several compression strategies will be tried,
+for example when there are several ways of
+pre-processing the input data with a filter.
+The streams that will be discarded
+should then be freed by calling
+.Xr deflateEnd 3 .
+Note that
+.Fn deflateCopy
+duplicates the internal compression state
+which can be quite large,
+so this strategy is slow
+and can consume lots of memory.
+.
+.Sh RETURN VALUES
+.Fn deflateCopy
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent
+.Po
+such as
+.Fa zalloc
+being
+.Dv Z_NULL
+.Pc .
+.Fa msg
+is left unchanged
+in both source and destination.
+.
+.Sh SEE ALSO
+.Xr deflateInit 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
diff --git a/doc/zlib/deflateEnd.3 b/doc/zlib/deflateEnd.3
new file mode 100644
index 0000000..e24259a
--- /dev/null
+++ b/doc/zlib/deflateEnd.3
@@ -0,0 +1,50 @@
+.Dd January 15, 2017
+.Dt DEFLATEEND 3
+.Os
+.
+.Sh NAME
+.Nm deflateEnd
+.Nd free deflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflateEnd "z_streamp strm"
+.
+.Sh DESCRIPTION
+All dynamically allocated data structures
+for this stream are freed.
+This function discards any unprocessed input
+and does not flush any pending output.
+.
+.Sh RETURN VALUES
+.Fn deflateEnd
+returns
+.Dv Z_OK
+if success,
+.Dv Z_STREAM_ERROR
+if the stream state was inconsistent,
+.Dv Z_DATA_ERROR
+if the stream was freed prematurely
+(some input or output was discarded).
+In the error case,
+.Fa msg
+may be set but then points to a static string
+(which must not be deallocated).
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.Xr deflateInit 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
diff --git a/doc/zlib/deflateGetDictionary.3 b/doc/zlib/deflateGetDictionary.3
new file mode 100644
index 0000000..403f6d1
--- /dev/null
+++ b/doc/zlib/deflateGetDictionary.3
@@ -0,0 +1,79 @@
+.Dd January 15, 2017
+.Dt DEFLATEGETDICTIONARY 3
+.Os
+.
+.Sh NAME
+.Nm deflateGetDictionary
+.Nd deflate sliding dictionary
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo deflateGetDictionary
+.Fa "z_streamp strm"
+.Fa "Bytef *dictionary"
+.Fa "uInt *dictLength"
+.Fc
+.
+.Sh DESCRIPTION
+Returns the sliding dictionary
+being maintained by deflate.
+.Fa dictLength
+is set to the number of bytes in the dictionary,
+and that many bytes are copied to
+.Fa dictionary .
+.Fa dictionary
+must have enough space,
+where 32768 bytes is always enough.
+If
+.Fn deflateGetDictionary
+is called with
+.Fa dictionary
+equal to
+.Dv Z_NULL ,
+then only the dictionary length is returned,
+and nothing is copied.
+Similarly,
+if
+.Fa dictLength
+is
+.Dv Z_NULL ,
+then it is not set.
+.
+.Pp
+.Fn deflateGetDictionary
+may return a length less than the window size,
+even when more than the window size in input
+has been provided.
+It may return up to 258 bytes less in that case,
+due to how zlib's implementation of deflate
+manages the sliding window and lookahead for matches,
+where matches can be up to 258 bytes long.
+If the application needs the last window-size bytes of input,
+then that would need to be saved by the application
+outside of zlib.
+.
+.Sh RETURN VALUES
+.Fn deflateGetDictionary
+returns
+.Dv Z_OK
+on success,
+or
+.Dv Z_STREAM_ERROR
+if the stream state is inconsistent.
+.
+.Sh SEE ALSO
+.Xr deflateSetDictionary 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
diff --git a/doc/zlib/deflateInit.3 b/doc/zlib/deflateInit.3
new file mode 100644
index 0000000..a893dd9
--- /dev/null
+++ b/doc/zlib/deflateInit.3
@@ -0,0 +1,178 @@
+.Dd January 15, 2017
+.Dt DEFLATEINIT 3
+.Os
+.
+.Sh NAME
+.Nm deflateInit
+.Nd initialize deflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.
+.Ft typedef voidpf
+.Fo (*alloc_func)
+.Fa "voidpf opaque"
+.Fa "uInt items"
+.Fa "uInt size"
+.Fc
+.
+.Ft typedef void
+.Fo (*free_func)
+.Fa "voidpf opaque"
+.Fa "voidpf address"
+.Fc
+.
+.Bd -literal
+typedef struct z_stream_s {
+	z_const Bytef *next_in;
+	uInt     avail_in;
+	uLong    total_in;
+
+	Bytef    *next_out;
+	uInt     avail_out;
+	uLong    total_out;
+
+	z_const char *msg;
+	struct internal_state FAR *state;
+
+	alloc_func zalloc;
+	free_func  zfree;
+	voidpf     opaque;
+
+	int     data_type;
+	uLong   adler;
+	uLong   reserved;
+} z_stream;
+.Ed
+.
+.Pp
+.Vt typedef z_stream FAR *z_streamp;
+.
+.Ft int
+.Fn deflateInit "z_streamp strm" "int level"
+.
+.Sh DESCRIPTION
+Initializes the internal stream state for compression.
+The fields
+.Fa zalloc ,
+.Fa zfree
+and
+.Fa opaque
+must be initialized before by the caller.
+If
+.Fa zalloc
+and
+.Fa zfree
+are set to
+.Dv Z_NULL ,
+.Fn deflateInit
+updates them to use default allocation functions.
+.Fn deflateInit
+does not perform any compression:
+this will be done by
+.Xr deflate 3 .
+.
+.Pp
+The compression
+.Fa level
+must be
+.Dv Z_DEFAULT_COMPRESSION ,
+or between 0 and 9:
+1 gives best speed,
+9 gives best compression,
+0 gives no compression at all
+(the input data is simply copied a block at a time).
+.Dv Z_DEFAULT_COMPRESSION
+requests a default compromise between speed and compression
+(currently equivalent to level 6).
+.
+.Pp
+The fields of
+.Vt z_stream
+are as follows:
+.
+.Bl -tag -width "data_type"
+.It Fa next_in
+next input byte
+.It Fa avail_in
+number of bytes available at
+.Fa next_in
+.It Fa total_in
+total number of input bytes read so far
+.It Fa next_out
+next output byte will go here
+.It Fa avail_out
+remaining free space at
+.Fa next_out
+.It Fa total_out
+total number of bytes output so far
+.It Fa msg
+last error message,
+.Dv NULL
+if no error
+.It Fa state
+not visible by applications
+.It Fa zalloc
+used to allocate the internal state
+.It Fa zfree
+used to free the internal state
+.It Fa opaque
+private data object passed to
+.Fa zalloc
+and
+.Fa zfree
+.It data_type
+best guess about the data type:
+binary or text for
+.Xr deflate 3 ,
+or the decoding state for
+.Xr inflate 3
+.It adler
+Adler-32 or CRC-32 value of the uncompressed data
+.It reserved
+reserved for future use
+.El
+.
+.Sh RETURN VALUES
+.Fn deflateInit
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_STREAM_ERROR
+if
+.Fa level
+is not a valid compression level,
+or
+.Dv Z_VERSION_ERROR
+if the zlib library version
+.Pq Xr zlibVersion 3
+is incompatible with the version assumed by the caller
+.Pq Dv ZLIB_VERSION .
+.Fa msg
+is set to null
+if there is no error message.
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.Xr deflateCopy 3 ,
+.Xr deflateEnd 3 ,
+.Xr deflateInit2 3 ,
+.Xr deflatePrime 3 ,
+.Xr deflateReset 3 ,
+.Xr deflateSetDictionary 3 ,
+.Xr deflateTune 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
diff --git a/doc/zlib/deflateInit2.3 b/doc/zlib/deflateInit2.3
new file mode 100644
index 0000000..6a581ef
--- /dev/null
+++ b/doc/zlib/deflateInit2.3
@@ -0,0 +1,227 @@
+.Dd January 15, 2017
+.Dt DEFLATEINIT2 3
+.Os
+.
+.Sh NAME
+.Nm deflateInit2
+.Nd deflate compression options
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo deflateInit2
+.Fa "z_streamp strm"
+.Fa "int level"
+.Fa "int method"
+.Fa "int windowBits"
+.Fa "int memLevel"
+.Fa "int strategy"
+.Fc
+.
+.Sh DESCRIPTION
+This is another version of
+.Xr deflateInit 3
+with more compression options.
+The fields
+.Fa next_in ,
+.Fa zalloc ,
+.Fa zfree
+and
+.Fa opaque
+must be initialized before by the caller.
+.
+.Pp
+The
+.Fa method
+parameter is the compression method.
+It must be
+.Dv Z_DEFLATED
+in this version of the library.
+.
+.Pp
+The
+.Fa windowBits
+parameter is the base two logarithm
+of the window size
+(the size of the history buffer).
+It should be in the range 8..15
+for this version of the library.
+Larger values of this parameter
+result in better compression
+at the expense of memory usage.
+The default value is 15 if
+.Xr deflateInit 3
+is used instead.
+.
+.Pp
+For the current implementation of
+.Xr deflate 3 ,
+a
+.Fa windowBits
+value of 8
+(a window size of 256 bytes)
+is not supported.
+As a result,
+a request for 8
+will result in 9
+(a 512-byte window).
+In that case,
+providing 8 to
+.Xr inflateInit2 3
+will result in an error
+when the zlib header with 9
+is checked against the initialization of
+.Xr inflate 3 .
+The remedy is to not use 8 with
+.Fn deflateInit2
+with this initialization,
+or at least in that case use 9 with
+.Xr inflateInit2 3 .
+.
+.Pp
+.Fa windowBits
+can also be -8..-15 for raw deflate.
+In this case,
+.Fa -windowBits
+determines the window size.
+.Xr deflate 3
+will then generate raw deflate data
+with no zlib header or trailer,
+and will not compute a check value.
+.
+.Pp
+.Fa windowBits
+can also be greater than 15
+for optional gzip encoding.
+Add 16 to
+.Fa windowBits
+to write a simple gzip header and trailer
+around the compressed data
+instead of a zlib wrapper.
+The gzip header will have
+no file name,
+no extra data,
+no comment,
+no modification time (set to zero),
+no header CRC,
+and the operating system will be set
+to the appropriate value,
+if the operating system was determined at compile time.
+If a gzip stream is being written,
+.Fa strm->adler
+is a CRC-32 instead of an Adler-32.
+.
+.Pp
+For raw deflate or gzip encoding,
+a request for a 256-byte window
+is rejected as invalid,
+since only the zlib header provides
+a means of transmitting the window size
+to the decompressor.
+.
+.Pp
+The
+.Fa memLevel
+parameter specifies how much memory should be allocated
+for the internal compression state.
+.Fa memLevel=1
+uses minimum memory
+but is slow and reduces compression ratio;
+.Fa memLevel=9
+uses maximum memory for optimal speed.
+The default value is 8.
+See
+.In zconf.h
+for total memory usage
+as a function of
+.Fa windowBits
+and
+.Fa memLevel .
+.
+.Pp
+The
+.Fa strategy
+parameter is used to tune the compression algorithm.
+Use the value
+.Dv Z_DEFAULT_STRATEGY
+for normal data,
+.Dv Z_FILTERED
+for data produced by a filter
+(or predictor),
+.Dv Z_HUFFMAN_ONLY
+to force Huffman encoding only
+(no string match),
+or
+.Dv Z_RLE
+to limit match distances to one
+(run-length encoding).
+Filtered data consists mostly of small values
+with a somewhat random distribution.
+In this case,
+the compression algorithm
+is tuned to compress them better.
+The effect of
+.Dv Z_FILTERED
+is to force more Huffman coding
+and less string matching;
+it is somewhat intermediate between
+.Dv Z_DEFAULT_STRATEGY
+and
+.Dv Z_HUFFMAN_ONLY .
+.Dv Z_RLE
+is designed to be almost as fast as
+.Dv Z_HUFFMAN_ONLY ,
+but give better compression for PNG image data.
+The
+.Fa strategy
+parameter only affects the compression ratio
+but not the correctness of the compressed output
+even if it is not set appropriately.
+.Dv Z_FIXED
+prevents the use of dynamic Huffman codes,
+allowing for a simpler decoder
+for special applications.
+.
+.Pp
+.Fn deflateInit2
+does not perform any compression:
+this will be done by
+.Xr deflate 3 .
+.
+.Sh RETURN VALUES
+.Fn deflateInit2
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_STREAM_ERROR
+if any parameter is invalid
+(such as invalid method),
+or
+.Dv Z_VERSION_ERROR
+if the zlib library version
+.Pq Xr zlibVersion 3
+is incompatible with the version assumed by the caller
+.Pq Dv ZLIB_VERSION .
+.Fa msg
+is set to null if there is no error message.
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.Xr deflateInit 3 ,
+.Xr deflateParams 3 ,
+.Xr deflateSetHeader 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
diff --git a/doc/zlib/deflateParams.3 b/doc/zlib/deflateParams.3
new file mode 100644
index 0000000..8e770d4
--- /dev/null
+++ b/doc/zlib/deflateParams.3
@@ -0,0 +1,123 @@
+.Dd January 15, 2017
+.Dt DEFLATEPARAMS 3
+.Os
+.
+.Sh NAME
+.Nm deflateParams
+.Nd update compression level and strategy
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflateParams "z_streamp strm" "int level" "int strategy"
+.
+.Sh DESCRIPTION
+Dynamically update the compression level
+and compression strategy.
+The interpretation of
+.Fa level
+and
+.Fa strategy
+is as in
+.Xr deflateInit2 3 .
+This can be used to switch between compression
+and straight copy of the input data,
+or to switch to a different kind of input data
+requiring a different strategy.
+If the compression approach
+(which is a function of the level)
+or the strategy is changed,
+and if any input has been consumed
+in a previous
+.Xr deflate 3
+call,
+then the input available so far is compressed
+with the old level and strategy using
+.Fn deflate strm Z_BLOCK .
+There are three approaches
+for the compression levels
+0, 1..3, and 4..9 respectively.
+The new level and strategy
+will take effect at the next call of
+.Xr deflate 3 .
+.
+.Pp
+If a
+.Fn deflate strm Z_BLOCK
+is performed by
+.Fn deflateParams ,
+and it does not have enough output space to complete,
+then the parameter change will not take effect.
+In this case,
+.Fn deflateParams
+can be called again
+with the same parameters
+and more output space
+to try again.
+.
+.Pp
+In order to assure a change in the parameters
+on the first try,
+the deflate stream should be flushed using
+.Xr deflate 3
+with
+.Dv Z_BLOCK
+or other flush request until
+.Fa strm.avail_out
+is not zero,
+before calling
+.Fn deflateParams .
+Then no more input data
+should be provided before the
+.Fn deflateParams
+call.
+If this is done,
+the old level and strategy
+will be applied
+to the data compressed before
+.Fn deflateParams ,
+and the new level and strategy
+will be applied
+to the data compressed after
+.Fn deflateParams .
+.
+.Sh RETURN VALUES
+.Fn deflateParams
+returns
+.Dv Z_OK
+on success,
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent
+or if a parameter was invalid,
+or
+.Dv Z_BUF_ERROR
+if there was not enough output space
+to complete the compression
+of the available input data
+before a change in the strategy or approach.
+Note that in the case of a
+.Dv Z_BUF_ERROR ,
+the parameters are not changed.
+A return value of
+.Dv Z_BUF_ERROR
+is not fatal,
+in which case
+.Fn deflateParams
+can be retried
+with more output space.
+.
+.Sh SEE ALSO
+.Xr deflateInit2 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
diff --git a/doc/zlib/deflatePending.3 b/doc/zlib/deflatePending.3
new file mode 100644
index 0000000..1ce40fc
--- /dev/null
+++ b/doc/zlib/deflatePending.3
@@ -0,0 +1,56 @@
+.Dd January 15, 2017
+.Dt DEFLATEPENDING 3
+.Os
+.
+.Sh NAME
+.Nm deflatePending
+.Nd pending deflate output
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflatePending "z_streamp strm" "unsigned *pending" "int *bits"
+.
+.Sh DESCRIPTION
+.Fn deflatePending
+returns the number of bytes and bits
+of output that have been generated,
+but not yet provided in the available output.
+The bytes not provided would be due to
+the available output space having been consumed.
+The number of bits of output not provided
+are between 0 and 7,
+where they await more bits to join them
+in order to fill out a full byte.
+If
+.Fa pending
+or
+.Fa bits
+are
+.Dv Z_NULL ,
+then those values are not set.
+.
+.Sh RETURN VALUES
+.Fn deflatePending
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr deflate 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
diff --git a/doc/zlib/deflatePrime.3 b/doc/zlib/deflatePrime.3
new file mode 100644
index 0000000..639e715
--- /dev/null
+++ b/doc/zlib/deflatePrime.3
@@ -0,0 +1,64 @@
+.Dd January 15, 2017
+.Dt DEFLATEPRIME 3
+.Os
+.
+.Sh NAME
+.Nm deflatePrime
+.Nd insert bits in deflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflatePrime "z_streamp strm" "int bits" "int value"
+.
+.Sh DESCRIPTION
+.Fn deflatePrime
+inserts bits in the deflate output stream.
+The intent is that this function
+is used to start off the deflate output
+with the bits leftover
+from a previous deflate stream
+when appending to it.
+As such,
+this function can only be used for raw deflate,
+and must be used before the first
+.Xr deflate 3
+call
+after a
+.Xr deflateInit2 3
+or
+.Xr deflateReset 3 .
+.Fa bits
+must be less than or equal to 16,
+and that many of the least significant bits of
+.Fa value
+will be inserted in the output.
+.
+.Sh RETURN VALUES
+.Fn deflatePrime
+returns
+.Dv Z_OK
+if success,
+.Dv Z_BUF_ERROR
+if there was not enough room
+in the internal buffer
+to insert the bits,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr deflateInit2 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
diff --git a/doc/zlib/deflateReset.3 b/doc/zlib/deflateReset.3
new file mode 100644
index 0000000..7309ac1
--- /dev/null
+++ b/doc/zlib/deflateReset.3
@@ -0,0 +1,57 @@
+.Dd January 15, 2017
+.Dt DEFLATERESET 3
+.Os
+.
+.Sh NAME
+.Nm deflateReset
+.Nd reset deflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn deflateReset "z_streamp strm"
+.
+.Sh DESCRIPTION
+This function is equivalent to
+.Xr deflateEnd 3
+followed by
+.Xr deflateInit 3 ,
+but does not free and reallocate
+the internal compression state.
+The stream will leave the compression level
+and any other attributes
+that may have been set unchanged.
+.
+.Sh RETURN VALUES
+.Fn deflateReset
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent
+.Po
+such as
+.Fa zalloc
+or
+.Fa state
+being
+.Dv Z_NULL
+.Pc .
+.
+.Sh SEE ALSO
+.Xr deflateEnd 3 ,
+.Xr deflateInit 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
diff --git a/doc/zlib/deflateSetDictionary.3 b/doc/zlib/deflateSetDictionary.3
new file mode 100644
index 0000000..c2c9d7c
--- /dev/null
+++ b/doc/zlib/deflateSetDictionary.3
@@ -0,0 +1,142 @@
+.Dd January 15, 2017
+.Dt DEFLATESETDICTIONARY 3
+.Os
+.
+.Sh NAME
+.Nm deflateSetDictionary
+.Nd initialize compression dictionary
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo deflateSetDictionary
+.Fa "z_streamp strm"
+.Fa "const Bytef *dictionary"
+.Fa "uInt dictLength"
+.Fc
+.
+.Sh DESCRIPTION
+.Fn deflateSetDictionary
+initializes the compression dictionary
+from the given byte sequence
+without producing any compressed output.
+When using the zlib format,
+this function must be called immediately after
+.Xr deflateInit 3 ,
+.Xr deflateInit2 3 ,
+or
+.Xr deflateReset 3 ,
+and before any call of
+.Xr deflate 3 .
+When doing raw deflate,
+this function must be called
+either before any call of
+.Xr deflate 3 ,
+or immediately after the completion of a deflate block,
+i.e. after all input has been consumed
+and all output has been delivered
+when using any of the flush options
+.Dv Z_BLOCK ,
+.Dv Z_PARTIAL_FLUSH ,
+.Dv Z_SYNC_FLUSH ,
+or
+.Dv Z_FULL_FLUSH .
+The compressor and decompressor
+must use exactly the same dictionary
+.Po
+see
+.Xr inflateSetDictionary 3
+.Pc .
+.
+.Pp
+The dictionary should consist of strings
+(byte sequences)
+that are likely to be encountered later
+in the data to be compressed,
+with the most commonly used strings
+preferably put towards the end of the dictionary.
+Using a dictionary is most useful
+when the data to be compressed is short
+and can be predicted with good accuracy;
+the data can then be compressed better than
+with the default empty dictionary.
+.
+.Pp
+Depending on the size of
+the compression data structures selected by
+.Xr deflateInit 3
+or
+.Xr deflateInit2 3 ,
+a part of the dictionary may in effect be discarded,
+for example if the dictionary is larger
+than the window size provided in
+.Xr deflateInit 3
+or
+.Xr deflateInit2 3 .
+Thus the strings most likely to be useful
+should be put at the end of the dictionary,
+not at the front.
+In addition,
+the current implementation of deflate
+will use at most the window size minus 262 bytes
+of the provided dictionary.
+.
+.Pp
+Upon return of this function,
+.Fa strm->adler
+is set to the Adler-32 value
+of the dictionary;
+the decompressor may later use this value
+to determine which dictionary has been used
+by the compressor.
+(The Adler-32 value applies to the whole dictionary
+even if only a subset of the dictionary
+is actually used by the compressor.)
+If a raw deflate was requested,
+then the Adler-32 value is not computed and
+.Fa strm->adler
+is not set.
+.
+.Pp
+.Fn deflateSetDictionary
+does not perform any compression:
+this will be done by
+.Xr deflate 3 .
+.
+.Sh RETURN VALUES
+.Fn deflateSetDictionary
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if a parameter is invalid
+.Po
+e.g. dictionary being
+.Dv Z_NULL
+.Pc
+or the stream state is inconsistent
+.Po
+for example if
+.Xr deflate 3
+has already been called for this stream
+or if not at a block boundary
+for raw deflate
+.Pc .
+.
+.Sh SEE ALSO
+.Xr deflateGetDictionary 3 ,
+.Xr inflateSetDictionary 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
diff --git a/doc/zlib/deflateSetHeader.3 b/doc/zlib/deflateSetHeader.3
new file mode 100644
index 0000000..6fec645
--- /dev/null
+++ b/doc/zlib/deflateSetHeader.3
@@ -0,0 +1,180 @@
+.Dd January 15, 2017
+.Dt DEFLATESETHEADER 3
+.Os
+.
+.Sh NAME
+.Nm deflateSetHeader
+.Nd set gzip header
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.
+.Bd -literal
+typedef struct gz_header_s {
+	int     text;
+	uLong   time;
+	int     xflags;
+	int     os;
+	Bytef   *extra;
+	uInt    extra_len;
+	uInt    extra_max;
+	Bytef   *name;
+	uInt    name_max;
+	Bytef   *comment;
+	uInt    comm_max;
+	int     hcrc;
+	int     done;
+} gz_header;
+.Ed
+.
+.Pp
+.Vt typedef gz_header FAR *gz_headerp;
+.
+.Ft int
+.Fn deflateSetHeader "z_streamp strm" "gz_headerp head"
+.
+.Sh DESCRIPTION
+.Fn deflateSetHeader
+provides gzip header information
+for when a gzip stream
+is requested by
+.Xr deflateInit2 3 .
+.Fn deflateSetHeader
+may be called after
+.Xr deflateInit2 3
+or
+.Xr deflateReset 3
+and before the first call of
+.Xr deflate 3 .
+The
+text,
+time,
+OS,
+extra field,
+name,
+and comment
+information in the provided
+.Vt gz_header
+structure
+are written to the gzip header
+.Po
+.Fa xflag
+is ignored \(em
+the extra flags are set
+according to the compression level
+.Pc .
+The caller must assure that,
+if not
+.Dv Z_NULL ,
+.Fa name
+and
+.Fa comment
+are terminated with a zero byte,
+and that if
+.Fa extra
+is not
+.Dv Z_NULL ,
+that
+.Fa extra_len
+bytes are available there.
+If
+.Fa hcrc
+is true,
+a gzip header CRC is included.
+Note that the current versions
+of the command-line version of
+.Xr gzip 1
+(up through version 1.3.x)
+do not support header CRCs,
+and will report that it is a
+"multi-part gzip file"
+and give up.
+.
+.Pp
+If
+.Fn deflateSetHeader
+is not used,
+the default gzip header has
+text false,
+the time set to zero,
+and OS set to 255,
+with no extra, name, or comment fields.
+The gzip header is returned
+to the default state by
+.Xr deflateReset 3 .
+.
+.Pp
+The fields of
+.Vt gz_header
+are as follows:
+.
+.Bl -tag -width "extra_len"
+.It Fa text
+true if compressed data believed to be text
+.It Fa time
+modification time
+.It Fa xflags
+extra flags
+(not used when writing a gzip file)
+.It Fa os
+operating system
+.It Fa extra
+pointer to extra field or
+.Dv Z_NULL
+if none
+.It Fa extra_len
+extra field length
+.Po
+valid if
+.Fa extra
+!=
+.Dv Z_NULL
+.Pc
+.It Fa extra_max
+space at extra
+(only when reading header)
+.It Fa name
+pointer to zero-terminated file name or
+.Dv Z_NULL
+.It Fa name_max
+space at
+.Fa name
+(only when reading header)
+.It Fa comment
+pointer to zero-terminated comment or
+.Dv Z_NULL
+.It Fa comm_max
+space at comment
+(only when reading header)
+.It Fa hcrc
+true if there was or will be a header CRC
+.It Fa done
+true when done reading gzip header
+(not used when writing a gzip file)
+.El
+.
+.Sh RETURN VALUES
+.Fn deflateSetHeader
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr gzip 1 ,
+.Xr deflateInit2 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
diff --git a/doc/zlib/deflateTune.3 b/doc/zlib/deflateTune.3
new file mode 100644
index 0000000..7269dec
--- /dev/null
+++ b/doc/zlib/deflateTune.3
@@ -0,0 +1,70 @@
+.Dd January 15, 2017
+.Dt DEFLATETUNE 3
+.Os
+.
+.Sh NAME
+.Nm deflateTune
+.Nd fine tune compression parameters
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo deflateTune
+.Fa "z_streamp strm"
+.Fa "int good_length"
+.Fa "int max_lazy"
+.Fa "int nice_length"
+.Fa "int max_chain"
+.Fc
+.
+.Sh DESCRIPTION
+Fine tune deflate's internal compression parameters.
+This should only be used
+by someone who understands the algorithm
+used by zlib's deflate
+for searching for the best matching string,
+and even then only by the most fanatic optimizer
+trying to squeeze out the last compressed bit
+for their specific input data.
+Read the
+.Pa deflate.c
+source code for the meaning of the
+.Fa max_lazy ,
+.Fa good_length ,
+.Fa nice_length ,
+and
+.Fa max_chain
+parameters.
+.
+.Pp
+.Fn deflateTune
+can be called after
+.Xr deflateInit 3
+or
+.Xr deflateInit2 3 .
+.
+.Sh RETURN VALUES
+.Fn deflateTune
+returns
+.Dv Z_OK
+on success,
+or
+.Dv Z_STREAM_ERROR
+for an invalid deflate stream.
+.
+.Sh SEE ALSO
+.Xr deflateInit 3 ,
+.Xr deflateInit2 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
diff --git a/doc/zlib/gzbuffer.3 b/doc/zlib/gzbuffer.3
new file mode 100644
index 0000000..de7c706
--- /dev/null
+++ b/doc/zlib/gzbuffer.3
@@ -0,0 +1,59 @@
+.Dd January 15, 2017
+.Dt GZBUFFER 3
+.Os
+.
+.Sh NAME
+.Nm gzbuffer
+.Nd set buffer size
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzbuffer "gzFile file" "unsigned size"
+.
+.Sh DESCRIPTION
+Set the internal buffer size
+used by this library's functions.
+The default buffer size is 8192 bytes.
+This function must be called after
+.Xr gzopen 3
+or
+.Xr gzdopen 3 ,
+and before any other calls
+that read or write the file.
+The buffer memory allocation
+is always deferred to the first read or write.
+Three times that size in buffer space is allocated.
+A larger buffer size of,
+for example,
+64K or 128K bytes
+will noticeably increase the speed
+of decompression (reading).
+.
+.Pp
+The new buffer size also affects
+the maximum length for
+.Xr gzprintf 3 .
+.
+.Sh RETURN VALUES
+.Fn gzbuffer
+returns 0 on success,
+or -1 on failure,
+such as being called too late.
+.
+.Sh SEE ALSO
+.Xr gzopen 3 ,
+.Xr gzprintf 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
diff --git a/doc/zlib/gzclose.3 b/doc/zlib/gzclose.3
new file mode 100644
index 0000000..77eae11
--- /dev/null
+++ b/doc/zlib/gzclose.3
@@ -0,0 +1,97 @@
+.Dd January 15, 2017
+.Dt GZCLOSE 3
+.Os
+.
+.Sh NAME
+.Nm gzclose ,
+.Nm gzclose_r ,
+.Nm gzclose_w
+.Nd close compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzclose "gzFile file"
+.Ft int
+.Fn gzclose_r "gzFile file"
+.Ft int
+.Fn gzclose_w "gzFile file"
+.
+.Sh DESCRIPTION
+Flushes all pending output if necessary,
+closes the compressed file
+and deallocates the (de)compression state.
+Note that once
+.Fa file
+is closed,
+you cannot call
+.Xr gzerror 3
+with
+.Fa file ,
+since its structures
+have been deallocated.
+.Fn gzclose
+must not be called more than once
+on the same file,
+just as
+.Xr free 3
+must not be called more than once
+on the same allocation.
+.
+.Pp
+.Fn gzclose_r
+and
+.Fn gzclose_w
+are the same as
+.Fn gzclose ,
+but
+.Fn gzclose_r
+is only for use when reading,
+and
+.Fn gzclose_w
+is only for use when writing or appending.
+The advantage to using these instead of
+.Fn gzclose
+is that they avoid linking in
+zlib compression or decompression code
+that is not used when only reading
+or only writing respectively.
+If
+.Fn gzclose
+is used,
+then both compression and decompression code
+will be included in the application
+when linking to a static zlib library.
+.
+.Sh RETURN VALUES
+.Fn gzclose
+will return
+.Dv Z_STREAM_ERROR
+if
+.Fa file
+is not valid,
+.Dv Z_ERRNO
+on a file operator error,
+.Dv Z_MEM_ERROR
+if out of memory,
+.Dv Z_BUF_ERROR
+if the last read ended in the middle of a gzip stream,
+or
+.Dv Z_OK
+on success.
+.
+.Sh SEE ALSO
+.Xr gzopen 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
diff --git a/doc/zlib/gzdirect.3 b/doc/zlib/gzdirect.3
new file mode 100644
index 0000000..8fa26aa
--- /dev/null
+++ b/doc/zlib/gzdirect.3
@@ -0,0 +1,85 @@
+.Dd January 15, 2017
+.Dt GZDIRECT 3
+.Os
+.
+.Sh NAME
+.Nm gzdirect
+.Nd check direct copy
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzdirect "gzFile file"
+.
+.Sh DESCRIPTION
+Returns true (1) if
+.Fa file
+is being copied directly while reading,
+or false (0) if
+.Fa file
+is a gzip stream being decompressed.
+.
+.Pp
+If the input file is empty,
+.Fn gzdirect
+will return true,
+since the input does not contain a gzip stream.
+.
+.Pp
+If
+.Fn gzdirect
+is used immediately after
+.Xr gzopen 3
+or
+.Xr gzdopen 3
+it will cause buffers to be allocated
+to allow reading the file
+to determine if it is a gzip file.
+Therefore if
+.Xr gzbuffer 3
+is used,
+it should be called before
+.Fn gzdirect .
+.
+.Pp
+When writing,
+.Fn gzdirect
+returns true (1)
+if transparent writing was requested
+.Po
+.Dq wT
+for the
+.Xr gzopen 3
+mode
+.Pc ,
+or false (0) otherwise.
+.Po
+Note:
+.Fn gzdirect
+is not needed when writing.
+Transparent writing
+must be explicitly requested,
+so the application already knows the answer.
+When linking statically,
+using
+.Fn gzdirect
+will include all of the zlib code
+for gzip file reading and decompression,
+which may not be desired.
+.Pc
+.
+.Sh SEE ALSO
+.Xr gzopen 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
diff --git a/doc/zlib/gzeof.3 b/doc/zlib/gzeof.3
new file mode 100644
index 0000000..26c415f
--- /dev/null
+++ b/doc/zlib/gzeof.3
@@ -0,0 +1,63 @@
+.Dd January 15, 2017
+.Dt GZEOF 3
+.Os
+.
+.Sh NAME
+.Nm gzeof
+.Nd check end-of-file indicator
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzeof "gzFile file"
+.
+.Sh DESCRIPTION
+Returns true (1)
+if the end-of-file indicator
+has been set while reading,
+false (0) otherwise.
+Note that the end-of-file indicator
+is set only if the read
+tried to go past the end of the input,
+but came up short.
+Therefore,
+just like
+.Xr feof 3 ,
+.Fn gzeof
+may return false
+even if there is no more data to read,
+in the event that the last read request
+was for the exact number of bytes
+remaining in the input file.
+This will happen if the input file size
+is an exact multiple of the buffer size.
+.
+.Pp
+If
+.Fn gzeof
+returns true,
+then the read functions
+will return no more data,
+unless the end-of-file indicator
+is reset by
+.Xr gzclearerr 3
+and the input file
+has grown since the previous
+end of file was detected.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzread 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
diff --git a/doc/zlib/gzerror.3 b/doc/zlib/gzerror.3
new file mode 100644
index 0000000..13dcddd
--- /dev/null
+++ b/doc/zlib/gzerror.3
@@ -0,0 +1,75 @@
+.Dd January 15, 2017
+.Dt GZERROR 3
+.Os
+.
+.Sh NAME
+.Nm gzerror ,
+.Nm gzclearerr
+.Nd check and reset compressed file error
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft const char *
+.Fn gzerror "gzFile file" "int *errnum"
+.Ft void
+.Fn gzclearerr "gzFile file"
+.
+.Sh DESCRIPTION
+.Fn gzerror
+returns the error message for the last error
+which occured on the given compressed file.
+.Fa errnum
+is set to the zlib error number.
+If an error occurred in the file system
+and not in the compression library,
+.Fa errnum
+is set to
+.Dv Z_ERRNO
+and the application may consult
+.Va errno
+to get the exact error code.
+.
+.Pp
+The application must not modify the returned string.
+Future calls to this function
+may invalidate the previously returned string.
+If
+.Fa file
+is closed,
+then the string previously returned by
+.Fn gzerror
+will no longer be available.
+.
+.Pp
+.Fn gzerror
+should be used to distinguish errors from end-of-file
+for those functions that do not distinguish those cases
+in their return values.
+.
+.Pp
+.Fn gzclearerr
+clears the error and end-of-file for
+.Fa file .
+This is analogous to the
+.Xr clearerr 3
+function in stdio.
+This is useful for continuing to read a gzip file
+that is being written concurrently.
+.
+.Sh SEE ALSO
+.Xr gzeof 3 ,
+.Xr gzread 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzflush.3 b/doc/zlib/gzflush.3
new file mode 100644
index 0000000..b93c03e
--- /dev/null
+++ b/doc/zlib/gzflush.3
@@ -0,0 +1,73 @@
+.Dd January 15, 2017
+.Dt GZFLUSH 3
+.Os
+.
+.Sh NAME
+.Nm gzflush
+.Nd flush output to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzflush "gzFile file" "int flush"
+.
+.Sh DESCRIPTION
+Flushes all pending output
+into the compressed file.
+The parameter
+.Fa flush
+is as in the
+.Xr deflate 3
+function.
+.Fn gzflush
+is only permitted when writing.
+.
+.Pp
+If the
+.Fa flush
+parameter is
+.Dv Z_FINISH ,
+the remaining data is written
+and the gzip stream
+is completed in the output.
+If
+.Xr gzwrite 3
+is called again,
+a new gzip stream
+will be started in the output.
+.Xr gzread 3
+is able to read
+such concatenated gzip streams.
+.
+.Pp
+.Fn gzflush
+should be called only when strictly necessary
+because it will degrade compression
+if called too often.
+.
+.Sh RETURN VALUES
+The return value
+is the zlib error number
+.Po
+see function
+.Xr gzerror 3
+.Pc .
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.Xr gzerror 3 ,
+.Xr gzread 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzfread.3 b/doc/zlib/gzfread.3
new file mode 100644
index 0000000..66231cc
--- /dev/null
+++ b/doc/zlib/gzfread.3
@@ -0,0 +1,107 @@
+.Dd January 15, 2017
+.Dt GZFREAD 3
+.Os
+.
+.Sh NAME
+.Nm gzfread
+.Nd read from compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft z_size_t
+.Fn gzfread "voidp buf" "z_size_t size" "z_size_t nitems" "gzFile file"
+.
+.Sh DESCRIPTION
+Read up to
+.Fa nitems
+of size
+.Fa size
+from
+.Fa file
+to
+.Fa buf ,
+otherwise operating as
+.Xr gzread 3
+does.
+This duplicates the interface of stdio's
+.Xr fread 3 ,
+with
+.Vt size_t
+request and return types.
+If the library defines
+.Vt size_t ,
+then
+.Vt z_size_t
+is identical to
+.Vt size_t .
+If not,
+then
+.Vt z_size_t
+is an unsigned integer type
+that can contain a pointer.
+.
+.Pp
+In the event that the end of file is reached
+and only a partial item is available at the end,
+i.e. the remaining uncompressed data length
+is not a multiple of
+.Fa size ,
+then the file partial item
+is nevertheless read into
+.Fa buf
+and the end-of-file flag is set.
+The length of the partial item read
+is not provided,
+but could be inferred from the result of
+.Xr gztell 3 .
+This behavior is the same as the behavior of
+.Xr fread 3
+implementations in common libraries,
+but it prevents the direct use of
+.Fn gzfread
+to read a concurrently written file,
+reseting and retrying on end-of-file,
+when
+.Fa size
+is not 1.
+.
+.Sh RETURN VALUES
+.Fn gzfread
+returns the number of full items read of size
+.Fa size ,
+or zero if the end of the file was reached
+and a full item could not be read,
+or if there was an error.
+.Xr gzerror 3
+must be consulted if zero is returned
+in order to determine if there was an error.
+If the multiplication of
+.Fa size
+and
+.Fa nitems
+overflows,
+i.e. the product does not fit in
+.Vt z_size_t ,
+then nothing is read,
+zero is returned,
+and the error state is set to
+.Dv Z_STREAM_ERROR .
+.
+.Sh SEE ALSO
+.Xr gzeof 3 ,
+.Xr gzerror 3 ,
+.Xr gzopen 3 ,
+.Xr gzread 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
diff --git a/doc/zlib/gzfwrite.3 b/doc/zlib/gzfwrite.3
new file mode 100644
index 0000000..38383a3
--- /dev/null
+++ b/doc/zlib/gzfwrite.3
@@ -0,0 +1,75 @@
+.Dd January 15, 2017
+.Dt GZFWRITE 3
+.Os
+.
+.Sh NAME
+.Nm gzfwrite
+.Nd write to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft z_size_t
+.Fn gzfwrite "voidpc buf" "z_size_t size" "z_size_t nitems" "gzFile file"
+.
+.Sh DESCRIPTION
+.Fn gzfwrite
+writes
+.Fa nitems
+items of size
+.Fa size
+from
+.Fa buf
+to
+.Fa file ,
+duplicating the interface of stdio's
+.Xr fwrite 3 ,
+with
+.Vt size_t
+request and return types.
+If the library defines
+.Vt size_t ,
+then
+.Vt z_size_t
+is identical to
+.Vt size_t .
+If not,
+then
+.Vt z_size_t
+is an unsigned integer type
+that can contain a pointer.
+.
+.Sh RETURN VALUES
+.Fn gzfwrite
+returns the number of full items
+written of size
+.Fa size ,
+or zero if there was an error.
+If the multiplication of
+.Fa size
+and
+.Fa nitems
+overflows,
+i.e. the product does not fit in a
+.Vt z_size_t ,
+then nothing is written,
+zero is returned,
+and the error state is set to
+.Dv Z_STREAM_ERROR .
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzopen 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzgetc.3 b/doc/zlib/gzgetc.3
new file mode 100644
index 0000000..93a90ed
--- /dev/null
+++ b/doc/zlib/gzgetc.3
@@ -0,0 +1,55 @@
+.Dd January 15, 2017
+.Dt GZGETC 3
+.Os
+.
+.Sh NAME
+.Nm gzgetc
+.Nd get character from compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzgetc "gzFile file"
+.
+.Sh DESCRIPTION
+Reads one byte from the compressed file.
+This is implemented as a macro for speed.
+As such,
+it does not do all of the checking
+the other functions do.
+I.e.\&
+it does not check to see if
+.Fa file
+is
+.Dv NULL ,
+nor whether the structure
+.Fa file
+points to has been clobbered or not.
+.
+.Sh RETURN VALUES
+.Fn gzgetc
+returns the byte
+or -1 in case of
+end of file
+or error.
+.
+.Sh SEE ALSO
+.Xr gzeof 3 ,
+.Xr gzerror 3 ,
+.Xr gzgets 3 ,
+.Xr gzopen 3 ,
+.Xr gzread 3 ,
+.Xr gzungetc 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
diff --git a/doc/zlib/gzgets.3 b/doc/zlib/gzgets.3
new file mode 100644
index 0000000..2a329e9
--- /dev/null
+++ b/doc/zlib/gzgets.3
@@ -0,0 +1,67 @@
+.Dd January 15, 2017
+.Dt GZGETS 3
+.Os
+.
+.Sh NAME
+.Nm gzgets
+.Nd read line from compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft char *
+.Fn gzgets "gzFile file" "char *buf" "int len"
+.
+.Sh DESCRIPTION
+Reads bytes from the compressed file
+until
+.Fa len-1
+characters are read,
+or a newline character
+is read and transferred to
+.Fa buf ,
+or an end-of-file condition
+is encountered.
+If any characters are read or if
+.Fa len
+== 1,
+the string is terminated
+with a null character.
+If no characters are read
+due to an end-of-file or
+.Fa len
+< 1,
+then the buffer is left untouched.
+.
+.Sh RETURN VALUES
+.Fn gzgets
+returns
+.Fa buf
+which is a null-terminated string,
+or it returns
+.Dv NULL
+for end-of-file
+or in case of error.
+If there was an error,
+the contents at
+.Fa buf
+are indeterminate.
+.
+.Sh SEE ALSO
+.Xr gzeof 3 ,
+.Xr gzerror 3 ,
+.Xr gzgetc 3 ,
+.Xr gzopen 3 ,
+.Xr gzread 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
diff --git a/doc/zlib/gzoffset.3 b/doc/zlib/gzoffset.3
new file mode 100644
index 0000000..cbb78a7
--- /dev/null
+++ b/doc/zlib/gzoffset.3
@@ -0,0 +1,51 @@
+.Dd January 15, 2017
+.Dt GZOFFSET 3
+.Os
+.
+.Sh NAME
+.Nm gzoffset
+.Nd offset in compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft z_off_t
+.Fn gzoffset "gzFile file"
+.
+.Sh DESCRIPTION
+Returns the current offset
+in the file being read or written.
+This offset includes
+the count of bytes
+that precede the gzip stream,
+for example when appending
+or when using
+.Xr gzdopen 3
+for reading.
+When reading,
+the offset does not include
+as yet unused buffered input.
+This information can be used
+for a progress indicator.
+.
+.Sh RETURN VALUES
+On error,
+.Fn gzoffset
+returns -1.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzopen 3 ,
+.Xr gzseek 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
diff --git a/doc/zlib/gzopen.3 b/doc/zlib/gzopen.3
new file mode 100644
index 0000000..e3cb4cb
--- /dev/null
+++ b/doc/zlib/gzopen.3
@@ -0,0 +1,261 @@
+.Dd January 15, 2017
+.Dt GZOPEN 3
+.Os
+.
+.Sh NAME
+.Nm gzopen ,
+.Nm gzdopen
+.Nd open gzip file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft gzFile
+.Fn gzopen "const char *path" "const char *mode"
+.Ft gzFile
+.Fn gzdopen "int fd" "const char *mode"
+.
+.Sh DESCRIPTION
+Opens a gzip (.gz) file
+for reading or writing.
+The
+.Fa mode
+parameter is as in
+.Xr fopen 3
+.Po
+.Dq rb
+or
+.Dq wb
+.Pc
+but can also include a compression level
+.Pq Dq wb9
+or a strategy:
+.Sq f
+for filtered data as in
+.Dq wb6f ,
+.Sq h
+for Huffman-only compression as in
+.Dq wb1h ,
+.Sq R
+for run-length encoding as in
+.Dq wb1R ,
+or
+.Sq F
+for fixed code compression as in
+.Dq wb9F .
+.Po
+See the description of
+.Xr deflateInit2 3
+for more information about the
+.Fa strategy
+parameter.
+.Pc \&
+.Sq T
+will request transparent writing or appending
+with no compression
+and not using the gzip format.
+.
+.Pp
+.Dq a
+can be used instead of
+.Dq w
+to request that the gzip stream
+that will be written
+be appended to the file.
+.Dq +
+will result in an error,
+since reading and writing
+to the same gzip file
+is not supported.
+The addition of
+.Dq x
+when writing will create the file exclusively,
+which fails if the file already exists.
+On systems that support it,
+the addition of
+.Dq e
+when reading or writing
+will set the flag to close the file on an
+.Xr execve 2
+call.
+.
+.Pp
+These functions,
+as well as
+.Xr gzip 1 ,
+will read and decode
+a sequence of gzip streams in a file.
+The append function of
+.Fn gzopen
+can be used to create such a file.
+.Po
+Also see
+.Xr gzflush 3
+for another way to do this.
+.Pc \&
+When appending,
+.Fn gzopen
+does not test whether the file begins with a gzip stream,
+nor does it look for the end of the gzip streams
+to begin appending.
+.Fn gzopen
+will simply append a gzip stream
+to the existing file.
+.
+.Pp
+.Fn gzopen
+can be used to read a file which is not in gzip format;
+in this case
+.Xr gzread 3
+will directly read from the file without decompression.
+When reading,
+this will be detected automatically
+by looking for the magic two-byte gzip header.
+.
+.Pp
+.Fn gzdopen
+associates at
+.Vt gzFile
+with the file descriptor
+.Fa fd .
+File descriptors
+are obtained from calls like
+.Xr open 2 ,
+.Xr dup 2 ,
+.Xr creat 2 ,
+.Xr pipe 2
+or
+.Xr fileno 3
+.Po
+if the file has been previously opened with
+.Xr fopen 3
+.Pc .
+The
+.Fa mode
+parameter is as in
+.Fn gzopen .
+.
+.Pp
+The next call of
+.Xr gzclose 3
+on the returned
+.Vt gzFile
+will also close the file descriptor
+.Fa fd ,
+just like
+.Xr fclose 3 .
+If you want to keep
+.Fa fd
+open,
+use
+.Li "fd = dup(fd_keep); gz = gzdopen(fd, mode)" .
+The duplicated descriptor should be saved
+to avoid a leak,
+since
+.Fn gzdopen
+does not close
+.Fa fd
+if it fails.
+If you are using
+.Xr fileno 3
+to get the file descriptor from a
+.Vt FILE * ,
+then you will have to use
+.Xr dup 2
+to avoid double-closing
+the file descriptor.
+Both
+.Xr gzclose 3
+and
+.Xr flcose 3
+will close the associated file descriptor,
+so they need to have different file descriptors.
+.
+.Sh RETURN VALUES
+.Fn gzopen
+and
+.Fn gzdopen
+return
+.Dv NULL
+if the file could not be opened,
+if there was insufficient memory
+to allocate the
+.Vt gzFile
+state,
+or if an invalid
+.Fa mode
+was specified
+.Po
+an
+.Sq r ,
+.Sq w ,
+or
+.Sq a
+was not provided,
+or
+.Sq +
+was provided
+.Pc ,
+or if
+.Fa fd
+is -1.
+The file descriptor
+is not used until the next
+gz* read, write, seek, or close operation,
+so
+.Fn gzdopen
+will not detect if
+.Fa fd
+is invalid
+.Po
+unless
+.Fa fd
+is -1
+.Pc .
+.Va errno
+can be checked
+to determine if the reason
+.Fn gzopen
+failed was that the file
+could not be opened.
+.
+.Sh ERRORS
+The
+.Fn gzopen
+function may fail and set
+.Va errno
+for any of the errors specified
+for the routine
+.Xr fopen 3 .
+.
+.Sh SEE ALSO
+.Xr deflateInit2 3 ,
+.Xr fopen 3 ,
+.Xr gzbuffer 3 ,
+.Xr gzclose 3 ,
+.Xr gzdirect 3 ,
+.Xr gzeof 3 ,
+.Xr gzerror 3 ,
+.Xr gzflush 3 ,
+.Xr gzgetc 3 ,
+.Xr gzgets 3 ,
+.Xr gzoffset 3 ,
+.Xr gzprintf 3 ,
+.Xr gzputc 3 ,
+.Xr gzputs 3 ,
+.Xr gzread 3 ,
+.Xr gzseek 3 ,
+.Xr gzsetparams 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzprintf.3 b/doc/zlib/gzprintf.3
new file mode 100644
index 0000000..26961f3
--- /dev/null
+++ b/doc/zlib/gzprintf.3
@@ -0,0 +1,71 @@
+.Dd January 15, 2017
+.Dt GZPRINTF 3
+.Os
+.
+.Sh NAME
+.Nm gzprintf
+.Nd format output to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzprintf "gzFile file" "const char *format" "..."
+.
+.Sh DESCRIPTION
+Converts, formats, and writes the arguments
+to the compressed file
+under control of the format string,
+as in
+.Xr fprintf 3 .
+.
+.Sh RETURN VALUES
+.Fn gzprintf
+returns the number of
+uncompressed bytes actually written,
+or a negative zlib error code
+in case of error.
+The number of uncompressed bytes written
+is limited to 8191,
+or one less than the buffer size given to
+.Xr gzbuffer 3 .
+The caller should assure that
+this limit is not exceeded.
+If it is exceeded,
+then
+.Fn gzprintf
+will return an error (0)
+with nothing written.
+In this case,
+there may also be a buffer overflow
+with unpredictable consequences,
+which is possibly only if zlib
+was compiled with the insecure functions
+.Xr sprintf 3
+or
+.Xr vsprintf 3
+because the secure
+.Xr snprintf 3
+or
+.Xr vsnprintf 3
+functions
+were not available.
+This can be determined using
+.Xr zlibCompileFlags 3 .
+.
+.Sh SEE ALSO
+.Xr fprintf 3 ,
+.Xr gzerror 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/gzputc.3 b/doc/zlib/gzputc.3
new file mode 100644
index 0000000..161e563
--- /dev/null
+++ b/doc/zlib/gzputc.3
@@ -0,0 +1,43 @@
+.Dd January 15, 2017
+.Dt GZPUTC 3
+.Os
+.
+.Sh NAME
+.Nm gzputc
+.Nd write character to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzputc "gzFile file" "int c"
+.
+.Sh DESCRIPTION
+Writes
+.Fa c ,
+converted to an
+.Vt unsigned char ,
+into the compressed file.
+.
+.Sh RETURN VALUES
+.Fn gzputc
+returns the value that was written,
+or -1 in case of error.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzopen 3 ,
+.Xr gzputs 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzputs.3 b/doc/zlib/gzputs.3
new file mode 100644
index 0000000..f5d1fd8
--- /dev/null
+++ b/doc/zlib/gzputs.3
@@ -0,0 +1,41 @@
+.Dd January 15, 2017
+.Dt GZPUTS 3
+.Os
+.
+.Sh NAME
+.Nm gzputs
+.Nd write string to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzputs "gzFile file" "const char *s"
+.
+.Sh DESCRIPTION
+Writes the given null-terminated string
+to the compressed file,
+excluding the terminating null character.
+.
+.Sh RETURN VALUES
+.Fn gzputs
+returns the number of characters written,
+or -1 in case of error.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzopen 3 ,
+.Xr gzputc 3 ,
+.Xr gzwrite 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
diff --git a/doc/zlib/gzread.3 b/doc/zlib/gzread.3
new file mode 100644
index 0000000..84439ea
--- /dev/null
+++ b/doc/zlib/gzread.3
@@ -0,0 +1,115 @@
+.Dd January 15, 2017
+.Dt GZREAD 3
+.Os
+.
+.Sh NAME
+.Nm gzread
+.Nd read from compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzread "gzFile file" "voidp buf" "unsigned len"
+.
+.Sh DESCRIPTION
+Reads the given number of uncompressed bytes
+from the compressed file.
+If the input file
+is not in gzip format,
+.Fn gzread
+copies the given number of bytes
+into the buffer directly from the file.
+.
+.Pp
+After reaching the end of a gzip stream
+in the input,
+.Fn gzread
+will continue to read,
+looking for another gzip stream.
+Any number of gzip streams
+may be concatenated in the input file,
+and will all be decompressed by
+.Fn gzread .
+If something other than a gzip stream
+is encountered after a gzip stream,
+that remaining trailing garbage is ignored
+(and no error is returned).
+.
+.Pp
+.Fn gzread
+can be used to read a gzip file
+that is being concurrently written.
+Upon reaching the end of the input,
+.Fn gzread
+will return with the available data.
+If the error code returned by
+.Xr gzerror 3
+is
+.Dv Z_OK
+or
+.Dv Z_BUF_ERROR ,
+then
+.Xr gzclearerr 3
+can be used
+to clear the end of file indicator
+in order to permit
+.Fn gzread
+to be tried again.
+.Dv Z_OK
+indicates that a gzip stream was completed
+on the last
+.Fn gzread .
+.Dv Z_BUF_ERROR
+indicates that the input file
+ended in the middle of a gzip stream.
+Note that
+.Fn gzread
+does not return -1
+in the event of an incomplete gzip stream.
+This error is deferred until
+.Xr gzclose 3 ,
+which will return
+.Dv Z_BUF_ERROR
+if the last
+.Fn gzread
+ended in the middle of a gzip stream.
+Alternatively,
+.Xr gzerror 3
+can be used before
+.Xr gzclose 3
+to detect this case.
+.
+.Sh RETURN VALUES
+.Fn gzread
+returns the number of uncompressed bytes actually read,
+less than
+.Fa len
+for end of file,
+or -1 for error.
+If
+.Fa len
+is too large to fit in an
+.Vt int ,
+then nothing is read,
+-1 is returned,
+and the error state is set to
+.Dv Z_STREAM_ERROR .
+.
+.Sh SEE ALSO
+.Xr gzeof 3 ,
+.Xr gzerror 3 ,
+.Xr gzfread 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/gzseek.3 b/doc/zlib/gzseek.3
new file mode 100644
index 0000000..cd85fd4
--- /dev/null
+++ b/doc/zlib/gzseek.3
@@ -0,0 +1,108 @@
+.Dd January 15, 2017
+.Dt GZSEEK 3
+.Os
+.
+.Sh NAME
+.Nm gzseek ,
+.Nm gzrewind ,
+.Nm gztell
+.Nd seek compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft z_off_t
+.Fn gzseek "gzFile file" "z_off_t offset" "int whence"
+.Ft int
+.Fn gzrewind "gzFile file"
+.Ft z_off_t
+.Fn gztell "gzFile file"
+.
+.Sh DESCRIPTION
+Sets the starting position
+for the next
+.Xr gzread 3
+or
+.Xr gzwrite 3
+on the given compressed file.
+The
+.Fa offset
+represents a number of bytes
+in the uncompressed data stream.
+The
+.Fa whence
+parameter
+is defined as in
+.Xr lseek 2 ;
+the value
+.Dv SEEK_END
+is not supported.
+.
+.Pp
+If the file is opened for reading,
+this function is emulated
+but can be extremely slow.
+If the file is opened for writing,
+only forward seeks are supported;
+.Fn gzseek
+then compresses a sequence of zeroes
+up to the new starting position.
+.
+.Pp
+.Fn gzrewind
+rewinds the given file.
+This function is supported
+only for reading.
+.
+.Pp
+.Fn gzrewind file
+is equivalent to
+.Li (int) Ns Fn gzseek file 0L SEEK_SET .
+.
+.Pp
+.Fn gztell
+returns the starting position
+for the next
+.Xr gzread 3
+or
+.Xr gzwrite 3
+on the given compressed file.
+This position represents a number of bytes
+in the uncompressed data stream,
+and is zero when starting,
+even if appending or reading
+a gzip stream from the middle of a file using
+.Xr gzdopen 3 .
+.
+.Pp
+.Fn gztell file
+is equivalent to
+.Fn gzseek file 0L SEEK_CUR .
+.
+.Sh RETURN VALUES
+.Fn gzseek
+returns the resulting offset location
+as measured in bytes
+from the beginning of the uncompressed stream,
+or -1 in case of error,
+in particular if the file
+is opened for writing
+and the new starting position
+would be before the current position.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzoffset 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/gzsetparams.3 b/doc/zlib/gzsetparams.3
new file mode 100644
index 0000000..ff544d2
--- /dev/null
+++ b/doc/zlib/gzsetparams.3
@@ -0,0 +1,51 @@
+.Dd January 15, 2017
+.Dt GZSETPARAMS 3
+.Os
+.
+.Sh NAME
+.Nm gzsetparams
+.Nd set compression level and strategy
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzsetparams "gzFile file" "int level" "int strategy"
+.
+.Sh DESCRIPTION
+Dynamically update the compression level or strategy.
+See the description of
+.Xr deflateInit2 3
+for the meaning
+of these parameters.
+Previously provided data is flushed
+before the parameter change.
+.
+.Sh RETURN VALUES
+.Fn gzsetparams
+returns
+.Dv Z_OK
+if success,
+.Dv Z_STREAM_ERROR
+if the file was not opened for writing,
+.Dv Z_ERRNO
+if there is an error writing the flushed data,
+or
+.Dv Z_MEM_ERROR
+if there is a memory allocation error.
+.
+.Sh SEE ALSO
+.Xr deflateInit2 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/gzungetc.3 b/doc/zlib/gzungetc.3
new file mode 100644
index 0000000..90cdafc
--- /dev/null
+++ b/doc/zlib/gzungetc.3
@@ -0,0 +1,67 @@
+.Dd January 15, 2017
+.Dt GZUNGETC 3
+.Os
+.
+.Sh NAME
+.Nm gzungetc
+.Nd un-get character from compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzungetc "int c" "gzFile file"
+.
+.Sh DESCRIPTION
+Push one character back onto the stream
+to be read as the first character
+on the next read.
+At least one character of push-back
+is allowed.
+.Fn gzungetc
+will fail if
+.Fa c
+is -1,
+and may fail if a character
+has been pushed
+but not read yet.
+If
+.Fn gzungetc
+is used immediately after
+.Xr gzopen 3
+or
+.Xr gzdopen 3 ,
+at least the output buffer size
+of pushed characters is allowed.
+.Po
+See
+.Xr gzbuffer 3 .
+.Pc \&
+The pushed character will be discarded
+if the stream is repositioned with
+.Xr gzseek 3
+or
+.Xr gzrewind 3 .
+.
+.Sh RETURN VALUES
+.Fn gzungetc
+returns the character pushed,
+or -1 on failure.
+.
+.Sh SEE ALSO
+.Xr gzbuffer 3 ,
+.Xr gzerror 3 ,
+.Xr gzgetc 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/gzwrite.3 b/doc/zlib/gzwrite.3
new file mode 100644
index 0000000..606d89f
--- /dev/null
+++ b/doc/zlib/gzwrite.3
@@ -0,0 +1,39 @@
+.Dd January 15, 2017
+.Dt GZWRITE 3
+.Os
+.
+.Sh NAME
+.Nm gzwrite
+.Nd write to compressed file
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn gzwrite "gzFile file" "voidpc buf" "unsigned len"
+.
+.Sh DESCRIPTION
+Writes the given number of uncompressed bytes
+into the compressed file.
+.
+.Sh RETURN VALUES
+.Fn gzwrite
+returns the number of uncompressed bytes written
+or 0 in case of error.
+.
+.Sh SEE ALSO
+.Xr gzerror 3 ,
+.Xr gzfwrite 3 ,
+.Xr gzopen 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
diff --git a/doc/zlib/inflate.3 b/doc/zlib/inflate.3
new file mode 100644
index 0000000..ca90c27
--- /dev/null
+++ b/doc/zlib/inflate.3
@@ -0,0 +1,398 @@
+.Dd January 15, 2017
+.Dt INFLATE 3
+.Os
+.
+.Sh NAME
+.Nm inflate
+.Nd deflate decompression
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflate "z_streamp strm" "int flush"
+.
+.Sh DESCRIPTION
+.Fn inflate
+decompresses as much data as possible,
+and stops when the input buffer becomes empty
+or the output buffer becomes full.
+It may introduce some output latency
+(reading input without producing any output)
+except when forced to flush.
+.
+.Pp
+The detailed semantics are as follows.
+.Fn inflate
+performs one or both of the following actions:
+.
+.Bl -dash
+.It
+Decompress more input starting at
+.Fa next_in
+and update
+.Fa next_in
+and
+.Fa avail_in
+accordingly.
+If not all input can be processed
+(because there is not enough room in the output buffer),
+then
+.Fa next_in
+and
+.Fa avail_in
+are updated accordingly,
+and processing will resume at this point
+for the next call of
+.Fn inflate .
+.
+.It
+Generate more output starting at
+.Fa next_out
+and update
+.Fa next_out
+and
+.Fa avail_out
+accordingly.
+.Fn inflate
+provides as much output as possible,
+until there is no more input data
+or no more space in the output buffer
+.Po
+see below about the
+.Fa flush
+parameter
+.Pc .
+.El
+.
+.Pp
+Before the call of
+.Fn inflate ,
+the application should ensure that
+at least one of the actions is possible,
+by providing more input
+and/or consuming more output,
+and updating the
+.Fa next_*
+and
+.Fa avail_*
+values accordingly.
+If the caller of
+.Fn inflate
+does not provide both available input
+and available output space,
+it is possible that there will be no progress made.
+The application can consume the uncompressed output
+when it wants,
+for example when the output buffer is full
+.Po
+.Fa avail_out
+== 0
+.Pc ,
+or after each call of
+.Fn inflate .
+If
+.Fn inflate
+returns
+.Dv Z_OK
+and with zero
+.Fa avail)out ,
+it must be called again after making room
+in the output buffer
+because there might be more output pending.
+.
+.Pp
+The
+.Fa flush
+parameter of
+.Fn inflate
+can be
+.Dv Z_NO_FLUSH ,
+.Dv Z_SYNC_FLUSH ,
+.Dv Z_FINISH ,
+.Dv Z_BLOCK ,
+or
+.Dv Z_TREES .
+.Dv Z_SYNC_FLUSH
+requests that
+.Fn inflate
+flush as much output as possible
+to the output buffer.
+.Dv Z_BLOCK
+requests that
+.Fn inflate
+stop if and when it gets to the next deflate block boundary.
+When decoding the zlib or gzip format,
+this will cause
+.Fn inflate
+to return immediately after the header
+and before the first block.
+When doing a raw inflate,
+.Fn inflate
+will go ahead and process the first block,
+and will return when it gets to the end of that block,
+or when it runs out of data.
+.
+.Pp
+The
+.Dv Z_BLOCK
+option assists in appending to
+or combining deflate streams.
+To assist in this,
+on return
+.Fn inflate
+always sets
+.Fa strm->data_type
+to the number of unused bits
+in the last byte taken from
+.Fa strm->next_in ,
+plus 64 if
+.Fn inflate
+is currently decoding the last block in the deflate stream,
+plus 128 if
+.Fn inflate
+returned immediately after decoding an end-of-block code
+or decoding the complete header up to
+just before the first byte of the deflate stream.
+The end-of-block will not be indicated
+until all of the uncompressed data
+from that block has been written to
+.Fa strm->next_out .
+The number of unused bits may in general be greater than seven,
+except when bit 7 of
+.Fa data_type
+is set,
+in which case the number of unused bits
+will be less than eight.
+.Fa data_type
+is set as noted here every time
+.Fn inflate
+returns for all flush options,
+and so can be used to determine
+the amount of currently consumed input in bits.
+.
+.Pp
+The
+.Dv Z_TREES
+option behaves as
+.Dv Z_BLOCK
+does,
+but it also returns
+when the end of each deflate block header is reached,
+before any actual data in that block is decoded.
+This allows the caller to determine
+the length of the deflate block header
+for later use in random access
+within a deflate block.
+256 is added to the value of
+.Fa strm->data_type
+when
+.Fn inflate
+returns immediately after reaching
+the end of the deflate block header.
+.
+.Pp
+.Fn inflate
+should normally be called until it returns
+.Dv Z_STREAM_END
+or an error.
+However if all decompression is to be performed
+in a single step
+.Po
+a single call of
+.Fn inflate
+.Pc ,
+the parameter
+.Fa flush
+should be set to
+.Dv Z_FINISH .
+In this case all pending input is processed
+and all pending output is flushed;
+.Fa avail_out
+must be large enough to hold all of
+the uncompressed data for the operation to complete.
+(The size of the uncompressed data
+may have been saved by the compressor for this purpose.)
+The use of
+.Dv Z_FINISH
+is not required to perform inflation in one step.
+However it may be used to inform
+.Fn inflate
+that a faster approach can be used for the single
+.Fn inflate
+call.
+.Dv Z_FINISH also informs
+.Fn inflate
+to not maintain a sliding window
+if the stream completes,
+which reduces
+.Fn inflate Ap s
+memory footprint.
+If the stream does not complete,
+either because not all of the stream is provided
+or not enough output space is provided,
+then a sliding window will be allocated and
+.Fn inflate
+can be called again to continue the operation as if
+.Dv Z_NO_FLUSH
+had been used.
+.
+.Pp
+In this implementation,
+.Fn inflate
+always flushes as much output as possible
+to the output buffer,
+and always uses the faster approach
+on the first call.
+So the effects of the
+.Fa flush
+parameter in this implementation
+are on the return value of
+.Fn inflate
+as noted below,
+when
+.Fn inflate
+returns early when
+.Dv Z_BLOCK
+or
+.Dv Z_TREES
+is used,
+and when
+.Fn inflate
+avoids the allocation of memory
+for a sliding window when
+.Dv Z_FINISH
+is used.
+.
+.Pp
+If a preset dictionary is needed after this call
+.Po
+see
+.Xr inflateSetDictionary 3
+.Pc ,
+.Fn inflate
+sets
+.Fa strm->adler
+to the Adler-32 checksum of the dictionary
+chosen by the compressor
+and returns
+.Dv Z_NEED_DICT ;
+otherwise it sets
+.Fa strm->adler
+to the Adler-32 checksum
+of all output produced so far
+.Po
+that is,
+.Fa total_out
+bytes
+.Pc
+and returns
+.Dv Z_OK ,
+.Dv Z_STREAM_END
+or an error code
+as described in
+.Sx RETURN VALUES .
+At the end of the stream,
+.Fn inflate
+checks that its computed Adler-32 checksum
+is equal to that saved by the compressor
+and returns
+.Dv Z_STREAM_END
+only if the checksum is correct.
+.
+.Pp
+.Fn inflate
+can decompress and check
+either zlib-wrapped or gzip-wrapped
+deflate data.
+The header type is detected automatically,
+if requested when initializing with
+.Xr inflateInit2 3 .
+Any information contained in the gzip header
+is not retained unless
+.Xr inflateGetHeader 3
+is used.
+When processing gzip-wrapped deflate data,
+.Fa strm->adler32
+is set to the CRC-32
+of the output produced so far.
+The CRC-32 is checked against the gzip trailer,
+as is the uncompressed length,
+modulo 2^32.
+.
+.Sh RETURN VALUES
+.Fn inflate
+returns
+.Dv Z_OK
+if some progress has been made
+(more input processed or more output produced),
+.Dv Z_STREAM_END
+if the end of the compressed data has been reached
+and all uncompressed output has been produced,
+.Dv Z_NEED_DICT
+if a preset dictionary is needed at this point,
+.Dv Z_DATA_ERROR
+if the input data was corrupted
+.Po
+input stream not conforming to the zlib format
+or incorrect check value,
+in which case
+.Fa strm->msg
+points to a string with a more specific error
+.Pc ,
+.Dv Z_STREAM_ERROR
+if the stream structure was inconsistent
+.Po
+for example
+.Fa next_in
+or
+.Fa next_out
+was
+.Dv Z_NULL ,
+or the state was inadvertently written over
+by the application
+.Pc ,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_BUF_ERROR
+if no progress was possible
+or if there was not enough room
+in the output buffer when
+.Dv Z_FINISH
+is used.
+Note that
+.Dv Z_BUF_ERROR
+is not fatal,
+and
+.Fn inflate
+can be called again with more input
+and more output space
+to continue decompressing.
+If
+.Dv Z_DATA_ERROR
+is returned,
+the application may then call
+.Xr inflateSync 3
+to look for a good compression block
+if a partial recovery of the data
+is to be attempted.
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.Xr inflateBack 3 ,
+.Xr inflateEnd 3 ,
+.Xr inflateInit 3 ,
+.Xr inflateMark 3 ,
+.Xr inflateSync 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
diff --git a/doc/zlib/inflateBack.3 b/doc/zlib/inflateBack.3
new file mode 100644
index 0000000..59d5f8c
--- /dev/null
+++ b/doc/zlib/inflateBack.3
@@ -0,0 +1,285 @@
+.Dd January 15, 2017
+.Dt INFLATEBACK 3
+.Os
+.
+.Sh NAME
+.Nm inflateBack
+.Nd inflate call-back interface
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.
+.Ft typedef unsigned
+.Fo (*in_func)
+.Fa "void FAR *"
+.Fa "z_const unsigned char FAR * FAR *"
+.Fc
+.
+.Ft typedef int
+.Fo (*out_func)
+.Fa "void FAR *"
+.Fa "unsigned char FAR *"
+.Fa "unsigned"
+.Fc
+.
+.Ft int
+.Fo inflateBack
+.Fa "z_streamp strm"
+.Fa "in_func in"
+.Fa "void FAR *in_desc"
+.Fa "out_func out"
+.Fa "void FAR *out_desc"
+.Fc
+.
+.Sh DESCRIPTION
+.Fn inflateBack
+does a raw inflate
+with a single call
+using a call-back interface
+for input and output.
+This is potentially more efficient than
+.Xr inflate 3
+for file I/O applications,
+in that it avoids copying between the output
+and the sliding window
+by simply making the window itself the output buffer.
+.Xr inflate 3
+can be faster on modern CPUs
+when used with large buffers.
+.Fn inflateBack
+trusts the application to not change
+the output buffer passed by the output function,
+at least until
+.Fn inflateBack
+returns.
+.
+.Pp
+.Xr inflateBackInit 3
+must be called first
+to allocate the internal state
+and to initialize the state
+with the user-provided window buffer.
+.Fn inflateBack
+may then be used multiple times
+to inflate a complete,
+raw deflate stream
+with each call.
+.Xr inflateBackEnd 3
+is then called to free the allocated state.
+.
+.Pp
+A raw deflate stream
+is one with no zlib or gzip header or trailer.
+This routine would normally be used
+in a utility that reads zip or gzip files
+and write out uncompressed files.
+The utility would decode the header
+and process the trailer on its own,
+hence this routine expects only
+the raw deflate stream to decompress.
+This is different from the default behaviour of
+.Xr inflate 3 ,
+which expects a zlib header and trailer
+around the deflate stream.
+.
+.Pp
+.Fn inflateBack
+uses two subroutines
+supplied by the caller
+that are then called by
+.Fn inflateBack
+for input and output.
+.Fn inflateBack
+calls those routines
+until it reads a complete deflate stream
+and writes out all of the uncompressed data,
+or until it encounters an error.
+The function's parameters and return types
+are defined above in the
+.Vt in_func
+and
+.Vt out_func
+typedefs.
+.Fn inflateBack
+will call
+.Fn in in_desc &buf
+which should return
+the number of bytes of provided input,
+and a pointer to that input in
+.Fa buf .
+If there is no input available,
+.Fn in
+must return zero \(em
+.Fa buf
+is ignored in that case \(em
+and
+.Fn inflateBack
+will return a buffer error.
+.Fn inflateBack
+will call
+.Fn out out_desc buf len
+to write the uncompressed data
+.Fa buf[0..len-1] .
+.Fn out
+should return zero on success,
+or non-zero on failure.
+If
+.Fn out
+returns non-zero,
+.Fn inflateBack
+will return with an error.
+Neither
+.Fn in
+nor
+.Fn out
+are permitted to change
+the contents of the window provided to
+.Xr inflateBackInit 3 ,
+which is also the buffer that
+.Fn out
+uses to write from.
+The length written by
+.Fn out
+will be at most the window size.
+Any non-zero amount of input
+may be provided by
+.Fn in .
+.
+.Pp
+For convenience,
+.Fn inflateBack
+can be provided input on the first call
+by setting
+.Fa strm->next_in
+and
+.Fa strm->avail_in .
+If that input is exhausted,
+then
+.Fn in
+will be called.
+Therefore
+.Fa strm->next_in
+must be initialized before calling
+.Fn inflateBack .
+If
+.Fa strm->next_in
+is
+.Dv Z_NULL ,
+then
+.Fn in
+will be called immediately for input.
+If
+.Fa strm->next_in
+is not
+.Dv Z_NULL ,
+then
+.Fa strm->avail_in
+must also be initialized,
+and then if
+.Fa strm->avail_in
+is not zero,
+input will initially be taken from
+.Fa "strm->next_in[0 .. strm->avail_in - 1]" .
+.
+.Pp
+The
+.Fa in_desc
+and
+.Fa out_desc
+parameters of
+.Fn inflateBack
+is passed as the first parameter of
+.Fn in
+and
+.Fn out
+respectively when they are called.
+These descriptors can be optionally used
+to pass any information that the caller-supplied
+.Fn in
+and
+.Fn out
+functions need to do their job.
+.
+.Sh RETURN VALUES
+On return,
+.Fn inflateBack
+will set
+.Fa strm->next_in
+and
+.Fa strm->avail_in
+to pass back any unused input
+that was provided by the last
+.Fn in
+call.
+The return values of
+.Fn inflateBack
+can be
+.Dv Z_STREAM_END
+on success,
+.Dv Z_BUF_ERROR
+if
+.Fn in
+or
+.Fn out
+returned an error,
+.Dv Z_DATA_ERROR
+if there was a format error
+in the deflate stream
+.Po
+in which case
+.Fa strm->msg
+is set to indicate the nature of the error
+.Pc ,
+or
+.Dv Z_STREAM_ERROR
+if the stream was not properly initialized.
+In the case of
+.Dv Z_BUF_ERROR ,
+an input or output error can be distinguished using
+.Fa strm->next_in
+which will be
+.Dv Z_NULL
+only if
+.Fn in
+returned an error.
+If
+.Fa strm->next_in
+is not
+.Dv Z_NULL ,
+then the
+.Dv Z_BUF_ERROR
+was due to
+.Fn out
+returning non-zero.
+.Po
+.Fn in
+will always be called before
+.Fn out ,
+so
+.Fa strm->next_in
+is assured to be defined if
+.Fa out
+returns non-zero.
+.Pc \&
+Note that
+.Fn inflateBack
+cannot return
+.Dv Z_OK .
+.
+.Sh SEE ALSO
+.Xr inflate 3 ,
+.Xr inflateBackEnd 3 ,
+.Xr inflateBackInit 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
diff --git a/doc/zlib/inflateBackEnd.3 b/doc/zlib/inflateBackEnd.3
new file mode 100644
index 0000000..eeb8863
--- /dev/null
+++ b/doc/zlib/inflateBackEnd.3
@@ -0,0 +1,43 @@
+.Dd January 15, 2017
+.Dt INFLATEBACKEND 3
+.Os
+.
+.Sh NAME
+.Nm inflateBackEnd
+.Nd free inflateBack stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateBackEnd "z_streamp strm"
+.
+.Sh DESCRIPTION
+All memory allocated by
+.Xr inflateBackInit 3
+is freed.
+.
+.Sh RETURN VALUES
+.Fn inflateBackEnd
+returns
+.Dv Z_OK
+on success,
+or
+.Dv Z_STREAM_ERROR
+if the stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr inflateBack 3 ,
+.Xr inflateBackInit 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
diff --git a/doc/zlib/inflateBackInit.3 b/doc/zlib/inflateBackInit.3
new file mode 100644
index 0000000..483edda
--- /dev/null
+++ b/doc/zlib/inflateBackInit.3
@@ -0,0 +1,84 @@
+.Dd January 15, 2017
+.Dt INFLATEBACKINIT 3
+.Os
+.
+.Sh NAME
+.Nm inflateBackInit
+.Nd initialize inflateBack stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo inflateBackInit
+.Fa "z_streamp strm"
+.Fa "int windowBits"
+.Fa "unsigned char FAR *window"
+.Fc
+.
+.Sh DESCRIPTION
+Initialize the internal stream state
+for decompression using
+.Xr inflateBack 3
+calls.
+The fields
+.Fa zalloc ,
+.Fa zfree
+and
+.Fa opaque
+in
+.Fa strm
+must be initialized before the call.
+If
+.Fa zalloc
+and
+.Fa zfree
+are
+.Dv Z_NULL ,
+then the default
+library-derived memory allocation routines are used.
+.Fa windowBits
+is the base two logarithm of the window size,
+in the range 8..15.
+.Fa window
+is a caller supplied buffer of that size.
+Except for special applications
+where it is assured that deflate
+was used with small window sizes,
+.Fa windowBits
+must be 15
+and a 32K byte
+.Fa window
+must be supplied
+to be able to decompress general deflate streams.
+.
+.Sh RETURN VALUES
+.Fn inflateBackInit
+will return
+.Dv Z_OK
+on success,
+.Dv Z_STREAM_ERROR
+if any of the parameters are invalid,
+.Dv Z_MEM_ERROR
+if the internal state could not be allocated,
+or
+.Dv Z_VERSION_ERROR
+if the version of the library
+does not match the version of the header file.
+.
+.Sh SEE ALSO
+.Xr inflateBack 3 ,
+.Xr inflateBackEnd 3 ,
+.Xr inflateInit 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
diff --git a/doc/zlib/inflateCopy.3 b/doc/zlib/inflateCopy.3
new file mode 100644
index 0000000..53b30ed
--- /dev/null
+++ b/doc/zlib/inflateCopy.3
@@ -0,0 +1,59 @@
+.Dd January 15, 2017
+.Dt INFLATECOPY 3
+.Os
+.
+.Sh NAME
+.Nm inflateCopy
+.Nd copy inflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateCopy "z_streamp dest" "z_streamp source"
+.
+.Sh DESCRIPTION
+Sets the destination stream
+as a complete copy of the source stream.
+.
+.Pp
+This function can be useful
+when randomly accessing a large stream.
+The first pass through the stream
+can periodically record the inflate state,
+allowing restarting inflate at those points
+when randomly accessing the stream.
+.
+.Sh RETURN VALUES
+.Fn inflateCopy
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent
+.Po
+such as
+.Fa zalloc
+being
+.Dv Z_NULL
+.Pc .
+.Fa msg
+is left unchanged
+in both source and destination.
+.
+.Sh SEE ALSO
+.Xr inflateInit 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
diff --git a/doc/zlib/inflateEnd.3 b/doc/zlib/inflateEnd.3
new file mode 100644
index 0000000..9b18226
--- /dev/null
+++ b/doc/zlib/inflateEnd.3
@@ -0,0 +1,44 @@
+.Dd January 15, 2017
+.Dt INFLATEEND 3
+.Os
+.
+.Sh NAME
+.Nm inflateEnd
+.Nd free inflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateEnd "z_streamp strm"
+.
+.Sh DESCRIPTION
+All dynamically allocated data structures
+for this stream are feed.
+This function discards any unprocessed input
+and does not flush any pending output.
+.
+.Sh RETURN VALUES
+.Fn inflateEnd
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr inflate 3 ,
+.Xr inflateInit 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
diff --git a/doc/zlib/inflateGetDictionary.3 b/doc/zlib/inflateGetDictionary.3
new file mode 100644
index 0000000..e70ee73
--- /dev/null
+++ b/doc/zlib/inflateGetDictionary.3
@@ -0,0 +1,69 @@
+.Dd January 15, 2017
+.Dt INFLATEGETDICTIONARY 3
+.Os
+.
+.Sh NAME
+.Nm inflateGetDictionary
+.Nd inflate sliding dictionary
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo inflateGetDictionary
+.Fa "z_streamp strm"
+.Fa "Bytef *dictionary"
+.Fa "uInt *dictLength"
+.Fc
+.
+.Sh DESCRIPTION
+Returns the sliding dictionary
+being maintained by
+.Xr inflate 3 .
+.Fa dictLength
+is set to the number of bytes
+in the dictionary,
+and that many bytes are copied to
+.Fa dictionary .
+.Fa dictionary
+must have enough space,
+where 32768 bytes is always enough.
+If
+.Fn inflateGetDictionary
+is called with
+.Fa dictionary
+equal to
+.Dv Z_NULL ,
+then only the dictionary length is returned,
+and nothing is copied.
+Similarly,
+if
+.Fa dictLength
+is
+.Dv Z_NULL ,
+then it is not set.
+.
+.Sh RETURN VALUES
+.Fn inflateGetDictionary
+returns
+.Dv Z_OK
+on success,
+or
+.Dv Z_STREAM_ERROR
+if the stream state is inconsistent.
+.
+.Sh SEE ALSO
+.Xr deflateSetDictionary 3 ,
+.Xr inflateSetDictionary 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
diff --git a/doc/zlib/inflateGetHeader.3 b/doc/zlib/inflateGetHeader.3
new file mode 100644
index 0000000..f77670f
--- /dev/null
+++ b/doc/zlib/inflateGetHeader.3
@@ -0,0 +1,170 @@
+.Dd January 15, 2017
+.Dt INFLATEGETHEADER 3
+.Os
+.
+.Sh NAME
+.Nm inflateGetHeader
+.Nd get gzip header
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateGetHeader "z_streamp strm" "gz_headerp head"
+.
+.Sh DESCRIPTION
+.Fn inflateGetHeader
+requests that gzip header information
+be stored in the provided
+.Vt gz_header
+structure.
+.Fn inflateGetHeader
+may be called after
+.Xr inflateInit2 3
+or
+.Xr inflateReset 3 ,
+and before the first call of
+.Xr inflate 3 .
+As
+.Xr inflate 3
+processes the gzip stream,
+.Fa head->done
+is zero until the header is completed,
+at which time
+.Fa head->done
+is set to one.
+If a zlib stream is being decoded,
+then
+.Fa head->done
+is set to -1 to indicate that
+there will be no gzip header information forthcoming.
+Note that
+.Dv Z_BLOCK
+or
+.Dv Z_TREES
+can be used to force
+.Xr inflate 3
+to return immediately after
+header processing is complete
+and before any actual data is decompressed.
+.
+.Pp
+The
+.Fa text ,
+.Fa time ,
+.Fa xflags ,
+and
+.Fa os
+fields are filled in with the gzip header contents.
+.Fa hcrc
+is set to true if there is a header CRC.
+.Po
+The header CRC was valid if
+.Fa done
+is set to one.
+.Pc \&
+If
+.Fa extra
+is not
+.Dv Z_NULL ,
+then
+.Fa extra_max
+contains the maximum number of bytes to write to
+.Fa extra .
+Once
+.Fa done
+is true,
+.Fa extra_len
+contains the actual extra field length,
+and
+.Fa extra
+contains the extra field,
+or that field truncated if
+.Fa extra_max
+is less than
+.Fa extra_len .
+If
+.Fa name
+is not
+.Dv Z_NULL ,
+then up to
+.Fa name_max
+characters are written there,
+terminated with a zero
+unless the length is greater than
+.Fa name_max .
+If
+.Fa comment
+is not
+.Dv Z_NULL ,
+then up to
+.Fa comm_max
+characters are written there,
+terminated with a zero
+unless the length is greater than
+.Fa comm_max .
+When any of
+.Fa extra ,
+.Fa name ,
+or
+.Fa comment
+are not
+.Dv Z_NULL
+and the respective field
+is not present in the header,
+then that field is set to
+.Dv Z_NULL
+to signal its absence.
+This allows the use of
+.Xr deflateSetHeader 3
+with the returned structure
+to duplicate the header.
+However if those fields are set to allocated memory,
+then the application will need to
+save those pointers elsewhere
+so that they can be eventually feed.
+.
+.Pp
+If
+.Fn inflateGetHeader
+is not used,
+then the header information is simply discarded.
+The header is always checked for validity,
+including the header CRC if present.
+.Xr inflateReset 3
+will reset the process to discard the header information.
+The application would need to call
+.Fn inflateGetHeader
+again to retrieve the header from the next gzip stream.
+.
+.Pp
+The
+.Vt gz_headerp
+type is documented in
+.Xr deflateSetHeader 3 .
+.
+.Sh RETURN VALUES
+.Fn inflateGetHeader
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr gzip 1 ,
+.Xr deflateSetHeader 3 ,
+.Xr inflateInit2 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
diff --git a/doc/zlib/inflateInit.3 b/doc/zlib/inflateInit.3
new file mode 100644
index 0000000..186b058
--- /dev/null
+++ b/doc/zlib/inflateInit.3
@@ -0,0 +1,101 @@
+.Dd January 15, 2017
+.Dt INFLATEINIT 3
+.Os
+.
+.Sh NAME
+.Nm inflateInit
+.Nd initialize inflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateInit "z_streamp strm"
+.
+.Sh DESCRIPTION
+Initializes the internal stream state for decompression.
+The fields
+.Fa next_in ,
+.Fa avail_in ,
+.Fa zalloc ,
+.Fa zfree
+and
+.Fa opaque
+must be initialized before by the caller.
+In the current version of
+.Fn inflateInit ,
+the provided input is not read or consumed.
+The allocation of a sliding window
+will be deferred to the first call of
+.Xr inflate 3
+(if the decompression does not complete on the first call).
+If
+.Fa zalloc
+and
+.Fa zfree
+are set to
+.Dv Z_NULL ,
+.Fn inflateInit
+updates them to use default allocation functions.
+.
+.Pp
+.Fn inflateInit
+does not perform any decompression.
+Actual decompression will be done by
+.Xr inflate 3 .
+So
+.Fa next_in ,
+.Fa avail_in ,
+.Fa next_out
+and
+.Fa avail_out
+are unused and unchanged.
+The current implementation of
+.Fn inflateInit
+does not process any header information \(em
+that is deferred until
+.Xr inflate 3
+is called.
+.
+.Pp
+The
+.Vt z_streamp
+type is documented in
+.Xr deflateInit 3 .
+.
+.Sh RETURN VALUES
+.Fn inflateInit
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_VERSION_ERROR
+if the zlib library version
+is incompatible with the version assumed by the caller,
+or
+.Dv Z_STREAM_ERROR
+if the parameters are invalid,
+such as a null pointer to the structure.
+.Fa msg
+is set to null if there is no error message.
+.
+.Sh SEE ALSO
+.Xr inflate 3 ,
+.Xr inflateBackInit 3 ,
+.Xr inflateCopy 3 ,
+.Xr inflateEnd 3 ,
+.Xr inflateInit2 3 ,
+.Xr inflateSetDictionary 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
diff --git a/doc/zlib/inflateInit2.3 b/doc/zlib/inflateInit2.3
new file mode 100644
index 0000000..a630f12
--- /dev/null
+++ b/doc/zlib/inflateInit2.3
@@ -0,0 +1,181 @@
+.Dd January 15, 2017
+.Dt INFLATEINIT2 3
+.Os
+.
+.Sh NAME
+.Nm inflateInit2
+.Nd inflate compression options
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateInit2 "z_streamp strm" "int windowBits"
+.
+.Sh DESCRIPTION
+This is another version of
+.Xr inflateInit 3
+with an extra parameter.
+The fields
+.Fa next_in ,
+.Fa avail_in ,
+.Fa zalloc ,
+.Fa zfree
+and
+.Fa opaque
+must be initialized before by the caller.
+.
+.Pp
+The
+.Fa windowBits
+parameter is the base two logarithm
+of the maximum window size
+(the size of the history buffer).
+It should be in the range 8..15
+for this version of the library.
+The default value is 15 if
+.Xr inflateInit 3
+is used instead.
+.Fa windowBits
+must be greater than or equal to the
+.Fa windowBits
+value provided to
+.Xr deflateInit2 3
+while compressing,
+or it must be equal to 15 if
+.Xr deflateInit2 3
+was not used.
+If a compressed stream with a larger window size
+is given as input,
+.Xr inflate 3
+will return with the error code
+.Dv Z_DATA_ERROR
+instead of trying to allocate a larger window.
+.
+.Pp
+.Fa windowBits
+can also be zero
+to request that
+.Xr inflate 3
+use the window size
+in the zlib header
+of the compressed stream.
+.
+.Pp
+.Fa windowBits
+can also be -8..-15
+for raw inflate.
+In this case,
+.Fa -windowBits
+determines the window size.
+.Xr inflate 3
+will then process raw deflate data,
+not looking for a zlib or gzip header,
+not generating a check value,
+and not looking for any check values
+for comparison at the end of the stream.
+This is for use with other formats
+that use the deflate compressed data format
+such as zip.
+Those formats provide their own check values.
+If a custom format is developed
+using the raw deflate format for compressed data,
+it is recommended that a check value
+such as an Adler-32 or a CRC-32
+be applied to the uncompressed data
+as is done in the zlib, gzip and zip formats.
+For most applications,
+the zlib format should be used as is.
+Note that comments above on the use in
+.Xr deflateInit2 3
+applies to the magnitude of
+.Fa windowBits .
+.
+.Pp
+.Fa windowBits
+can also be greater than 15
+for optional gzip decoding.
+Add 32 to
+.Fa windowBits
+to enable zlib and gzip decoding
+with automatic header detection,
+or add 16 to decode only the gzip format
+.Po
+the zlib format will return a
+.Dv Z_DATA_ERROR
+.Pc .
+If a gzip stream is being decoded,
+.Fa strm->adler
+is a CRC-32 instead of an Adler-32.
+Unlike the
+.Xr gunzip 1
+utility and
+.Xr gzread 3 ,
+.Xr inflate 3
+will not automatically decode
+concatenated gzip streams.
+.Xr inflate 3
+will return
+.Dv Z_STREAM_END
+at the end of the gzip stream.
+The state would need to be reset
+to continue decoding a subsequent gzip stream.
+.
+.Pp
+.Fn inflateInit2
+does not perform any decompression
+apart from possibly reading the zlib header if present:
+actual decompression will be done by
+.Xr inflate 3 .
+.Po
+So
+.Fa next_in
+and
+.Fa avail_in
+may be modified,
+but
+.Fa next_out
+and
+.Fa avail_out
+are unused and unchanged.
+.Pc \&
+The current implementation of
+.Fn inflateInit2
+does not process any header information \(em
+that is deferred until
+.Xr inflate 3
+is called.
+.
+.Sh RETURN VALUES
+.Fn inflateInit2
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_VERSION_ERROR
+if the zlib library version
+is incompatible with the version assumed by the caller,
+or
+.Dv Z_STREAM_ERROR
+if the parameters are invalid,
+such as a null pointer to the structure.
+.Fa msg
+is set to null if there is no error message.
+.
+.Sh SEE ALSO
+.Xr deflateInit2 3 ,
+.Xr inflateInit 3 ,
+.Xr inflatePrime 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
diff --git a/doc/zlib/inflateMark.3 b/doc/zlib/inflateMark.3
new file mode 100644
index 0000000..2d15993
--- /dev/null
+++ b/doc/zlib/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
diff --git a/doc/zlib/inflatePrime.3 b/doc/zlib/inflatePrime.3
new file mode 100644
index 0000000..c89dc2c
--- /dev/null
+++ b/doc/zlib/inflatePrime.3
@@ -0,0 +1,73 @@
+.Dd January 15, 2017
+.Dt INFLATEPRIME 3
+.Os
+.
+.Sh NAME
+.Nm inflatePrime
+.Nd insert bits in inflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflatePrime "z_streamp strm" "int bits" "int value"
+.
+.Sh DESCRIPTION
+This function inserts bits
+in the inflate input stream.
+The intent is that this function
+is used to start inflating
+at a bit position
+in the middle of a byte.
+The provided bits will be used
+before any bytes are used from
+.Fa next_in .
+This function should only be used with raw inflate,
+and should be used before the first
+.Xr inflate 3
+call after
+.Xr inflateInit2 3
+or
+.Xr inflateReset 3 .
+.Fa bits
+must be less than or equal to 16,
+and that many of the least significant bits of
+.Fa value
+will be inserted in the input.
+.
+.Pp
+If
+.Fa bits
+is negative,
+then the input stream bit buffer is emptied.
+Then
+.Fn inflatePrime
+can be called again
+to put bits in the buffer.
+This is used to clear out bits leftover
+after feeding inflate a block description
+prior to feeding inflate codes.
+.
+.Sh RETURN VALUES
+.Fn inflatePrime
+returns
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent.
+.
+.Sh SEE ALSO
+.Xr inflateInit2 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
diff --git a/doc/zlib/inflateReset.3 b/doc/zlib/inflateReset.3
new file mode 100644
index 0000000..a8d2e21
--- /dev/null
+++ b/doc/zlib/inflateReset.3
@@ -0,0 +1,81 @@
+.Dd January 15, 2017
+.Dt INFLATERESET 3
+.Os
+.
+.Sh NAME
+.Nm inflateReset ,
+.Nm inflateReset2
+.Nd reset inflate stream
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateReset "z_streamp strm"
+.Ft int
+.Fn inflateReset2 "z_streamp strm" "int windowBits"
+.
+.Sh DESCRIPTION
+This function is equivalent to
+.Xr inflateEnd 3
+followed by
+.Xr inflateInit 3 ,
+but does not free and reallocate
+the internal decompression state.
+The stream will keep attributes
+that may have been set by
+.Xr inflateInit2 3 .
+.
+.Pp
+.Fn inflateReset2
+is the same as
+.Fn inflateReset ,
+but it also permits changing
+the wrap and window size requests.
+The
+.Fa windowBits
+parameter is interpreted the same as it is for
+.Xr inflateInit2 3 .
+If the window size is changed,
+then the memory allocated for the window is freed,
+and the window will be reallocated by
+.Xr inflate 3
+if needed.
+.
+.Sh RETURN VALUES
+.Fn inflateReset
+and
+.Fn inflateReset2
+return
+.Dv Z_OK
+if success,
+or
+.Dv Z_STREAM_ERROR
+if the source stream state was inconsistent
+.Po
+such as
+.Fa zalloc
+or
+.Fa state
+being
+.Dv Z_NULL
+.Pc ,
+or if the
+.Fa windowBits
+parameter is invalid.
+.
+.Sh SEE ALSO
+.Xr inflateEnd 3 ,
+.Xr inflateInit 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
diff --git a/doc/zlib/inflateSetDictionary.3 b/doc/zlib/inflateSetDictionary.3
new file mode 100644
index 0000000..0e3c60c
--- /dev/null
+++ b/doc/zlib/inflateSetDictionary.3
@@ -0,0 +1,85 @@
+.Dd January 15, 2017
+.Dt INFLATESETDICTIONARY 3
+.Os
+.
+.Sh NAME
+.Nm inflateSetDictionary
+.Nd initialize decompression dictionary
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fo inflateSetDictionary
+.Fa "z_streamp strm"
+.Fa "const Bytef *dictionary"
+.Fa "uInt dictLength"
+.Fc
+.
+.Sh DESCRIPTION
+Initializes the decompression dictionary
+from the given uncompressed byte sequence.
+This function must be called
+immediately after a call of
+.Xr inflate 3 ,
+if that call returned
+.Dv Z_NEED_DICT .
+The dictionary chosen by the compressor
+can be determined from the Adler-32 value
+returned by that call of
+.Xr inflate 3 .
+The compressor and decompressor
+must use exactly the same dictionary
+.Po
+see
+.Xr deflateSetDictionary 3
+.Pc .
+For raw inflate,
+this function can be called at any time
+to set the dictionary.
+If the provided dictionary
+is smaller than the window
+and there is already data in the window,
+then the provided dictionary
+will amend what's there.
+The application must insure that the dictionary
+that was used for compression is provided.
+.
+.Pp
+.Fn inflateSetDictionary
+does not perform any decompression:
+this will be done by subsequent calls of
+.Xr inflate 3 .
+.
+.Sh RETURN VALUES
+.Fn inflateSetDictionary
+returns
+.Dv Z_OK
+if success,
+.Dv Z_STREAM_ERROR
+if a parameter is invalid
+.Po
+e.g. dictionary being
+.Dv Z_NULL
+.Pc
+or the stream state is inconsistent,
+.Dv Z_DATA_ERROR
+if the given dictionary
+doesn't match the expected one
+(incorrect Adler-32 value).
+.
+.Sh SEE ALSO
+.Xr deflateGetDictionary 3 ,
+.Xr inflateGetDictionary 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
diff --git a/doc/zlib/inflateSync.3 b/doc/zlib/inflateSync.3
new file mode 100644
index 0000000..35264dd
--- /dev/null
+++ b/doc/zlib/inflateSync.3
@@ -0,0 +1,72 @@
+.Dd January 15, 2017
+.Dt INFLATESYNC 3
+.Os
+.
+.Sh NAME
+.Nm inflateSync
+.Nd skip invalid data
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft int
+.Fn inflateSync "z_streamp strm"
+.
+.Sh DESCRIPTION
+Skips invalid compressed data
+until a possible full flush point
+.Po
+see
+.Xr deflate 3
+for the description of
+.Dv Z_FULL_FLUSH
+.Pc
+can be found,
+or until all available input is skipped.
+No output is provided.
+.
+.Pp
+.Fn inflateSync
+searches for a 00 00 FF FF pattern
+in the compressed data.
+All full flush points have this pattern,
+but not all occurrences of this pattern
+are full flush points.
+.
+.Sh RETURN VALUES
+.Fn inflateSync
+returns
+.Dv Z_OK
+if a possible full flush point has been found,
+.Dv Z_BUF_ERROR
+if no more input was provided,
+.Dv Z_DATA_ERROR
+if no flush point has been found,
+or
+.Dv Z_STREAM_ERROR
+if the stream structure was inconsistent.
+In the success case,
+the application may save the current value of
+.Fa total_in
+which indicates where valid compressed data was found.
+In the error case,
+the application may repeatedly call
+.Fn inflateSync ,
+providing more input each time,
+until success or the end of the input data.
+.
+.Sh SEE ALSO
+.Xr deflate 3 ,
+.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
diff --git a/doc/zlib/uncompress.3 b/doc/zlib/uncompress.3
new file mode 100644
index 0000000..d951da9
--- /dev/null
+++ b/doc/zlib/uncompress.3
@@ -0,0 +1,92 @@
+.Dd January 15, 2017
+.Dt UNCOMPRESS 3
+.Os
+.
+.Sh NAME
+.Nm uncompress ,
+.Nm uncompress2
+.Nd decompress source buffer into destination buffer
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.
+.Ft int
+.Fo uncompress
+.Fa "Bytef *dest"
+.Fa "uLongf *destLen"
+.Fa "const Bytef *source"
+.Fa "uLong sourceLen"
+.Fc
+.
+.Ft int
+.Fo uncompress2
+.Fa "Bytef *dest"
+.Fa "uLongf *destLen"
+.Fa "const Bytef *source"
+.Fa "uLong *sourceLen"
+.Fc
+.
+.Sh DESCRIPTION
+Decompresses the source buffer into the destination buffer.
+.Fa sourceLen
+is the byte length of the source buffer.
+Upon entry,
+.Fa destLen
+is the total size of the destination buffer,
+which must be large enough to hold the entire uncompressed data.
+.Po
+The size of the uncompressed data
+must have been saved previously by the compressor
+and transmitted to the decompressor
+by some mechanism outside the scope of this compression library.
+.Pc \&
+Upon exit,
+.Fa destLen
+is the actual size of the uncompressed data.
+.
+.Pp
+.Fn uncompress2
+is the same as
+.Fn uncompress ,
+except that
+.Fa sourceLen
+is a pointer,
+where the length of the source is
+.Fa *sourceLen .
+On return,
+.Fa *sourceLen
+is the number of source bytes consumed.
+.
+.Sh RETURN VALUES
+.Fn uncompress
+returns
+.Dv Z_OK
+if success,
+.Dv Z_MEM_ERROR
+if there was not enough memory,
+.Dv Z_BUF_ERROR
+if there was not enough room in the output buffer,
+or
+.Dv Z_DATA_ERROR
+if the input data was corrupted or incomplete.
+In the case where there is not enough room,
+.Fn uncompress
+will fill the output buffer
+with the uncompressed data up to that point.
+.
+.Sh SEE ALSO
+.Xr compress 3 ,
+.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
diff --git a/doc/zlib/zlibCompileFlags.3 b/doc/zlib/zlibCompileFlags.3
new file mode 100644
index 0000000..465195c
--- /dev/null
+++ b/doc/zlib/zlibCompileFlags.3
@@ -0,0 +1,163 @@
+.Dd January 15, 2017
+.Dt ZLIBCOMPILEFLAGS 3
+.Os
+.
+.Sh NAME
+.Nm zlibCompileFlags
+.Nd zlib compile-time options
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Ft uLong
+.Fn zlibCompileFlags void
+.
+.Sh DESCRIPTION
+Return flags indicating compile-time options.
+.
+.Ss Type sizes
+Two bits each,
+00 = 16 bits,
+01 = 32 bits,
+10 = 64 bits,
+11 = other.
+.
+.Pp
+.Bl -tag -width Ds -compact
+.It 1.0
+size of
+.Vt uInt
+.It 3.2
+size of
+.Vt uLong
+.It 5.4
+size of
+.Vt voidpf
+(pointer)
+.It 7.6
+size of
+.Vt z_off_t
+.El
+.
+.Ss Compiler, assembler, and debug options
+.Bl -tag -width Ds -compact
+.It 8
+.Dv ZLIB_DEBUG
+.It 9
+.Dv ASMV
+or
+.Dv ASMINF
+\(em
+use ASM code
+.It 10
+.Dv ZLIB_WINAPI
+\(em
+exported functions use the WINAPI calling convention
+.It 11
+0 (reserved)
+.El
+.
+.Ss One-time table building
+Smaller code,
+but not thread-safe if true.
+.
+.Pp
+.Bl -tag -width Ds -compact
+.It 12
+.Dv BUILDFIXED
+\(em
+build static block decoding tables when needed
+.It 13
+.Dv DYNAMIC_CRC_TABLE
+\(em
+build CRC calculation tables when needed
+.It 14,15
+0 (reserved)
+.El
+.
+.Ss Library content
+Indicates missing functionality.
+.
+.Pp
+.Bl -tag -width Ds -compact
+.It 16
+.Dv NO_GZCOMPRESS
+\(em
+gz* functions cannot compress
+(to avoid linking deflate code when not needed)
+.It 17
+.Dv NO_GZIP
+\(em
+.Xr deflate 3
+can't write gzip streams,
+and
+.Xr inflate 3
+can't detect and decode gzip streams
+(to avoid linking crc code)
+.It 18-19
+0 (reserved)
+.El
+.
+.Ss Operation variations
+Changes in library functionality.
+.
+.Pp
+.Bl -tag -width Ds -compact
+.It 20
+.Dv PKZIP_BUG_WORKAROUND
+\(em
+slightly more permissive
+.Xr inflate 3
+.It 21
+.Dv FASTEST
+\(em
+deflate algorithm with only one,
+lowest compression level
+.It 22,23
+0 (reserved)
+.El
+.
+.Ss sprintf variant used by gzprintf
+Zero is best.
+.
+.Pp
+.Bl -tag -width Ds -compact
+.It 24
+0 = vs*,
+1 = s*
+\(em
+1 means limited to 20 arguments after the format
+.It 25
+0 = *nprintf,
+1 = *printf
+\(em
+1 means
+.Xr gzprintf 3
+not secure!
+.It 26
+0 = returns value,
+1 = void
+\(em
+1 means inferred string length returned
+.El
+.
+.Ss Remainder
+.Bl -tag -width Ds -compact
+.It 27-31
+0 (reserved)
+.El
+.
+.Sh SEE ALSO
+.Xr zlibVersion 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
diff --git a/doc/zlib/zlibVersion.3 b/doc/zlib/zlibVersion.3
new file mode 100644
index 0000000..35a9854
--- /dev/null
+++ b/doc/zlib/zlibVersion.3
@@ -0,0 +1,45 @@
+.Dd January 15, 2017
+.Dt ZLIBVERSION 3
+.Os
+.
+.Sh NAME
+.Nm zlibVersion
+.Nd check zlib version
+.
+.Sh LIBRARY
+.Lb libz
+.
+.Sh SYNOPSIS
+.In zlib.h
+.Fd #define ZLIB_VERSION \(dq1.2.11\(dq
+.Ft "const char *"
+.Fn zlibVersion void
+.
+.Sh DESCRIPTION
+The application can compare
+.Fn zlibVersion
+and
+.Dv ZLIB_VERSION
+for consistency.
+If the first character differs,
+the library code actually used
+is not compatible with the
+.In zlib.h
+header file used by the application.
+This check is automatically made by
+.Xr deflateInit 3
+and
+.Xr inflateInit 3 .
+.
+.Sh SEE ALSO
+.Xr zlibCompileFlags 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