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+.Dd November 13, 2018
+.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.