.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