1.\" $NetBSD: dwarf_formflag.3,v 1.6 2024/03/03 17:37:31 christos Exp $ 2.\" 3.\" Copyright (c) 2010 Joseph Koshy 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" Id: dwarf_formflag.3 3962 2022-03-12 15:56:10Z jkoshy 28.\" 29.Dd June 21, 2010 30.Dt DWARF_FORMFLAG 3 31.Os 32.Sh NAME 33.Nm dwarf_formflag 34.Nd return the value of a BOOLEAN class attribute 35.Sh LIBRARY 36.Lb libdwarf 37.Sh SYNOPSIS 38.In libdwarf.h 39.Ft int 40.Fo dwarf_formflag 41.Fa "Dwarf_Attribute attr" 42.Fa "Dwarf_Bool *ret" 43.Fa "Dwarf_Error *err" 44.Fc 45.Sh DESCRIPTION 46Function 47.Fn dwarf_formflag 48sets the location pointed to by argument 49.Fa ret 50to 1 if the attribute referenced by argument 51.Fa attr 52has a non-zero value, or 0 otherwise. 53The form of argument 54.Fa attr 55must be one of 56.Dv DW_FORM_flag 57or 58.Dv DW_FORM_flag_present . 59.Pp 60If argument 61.Fa err 62is not 63.Dv NULL , 64it will be used to return an error descriptor in case of an error. 65.Sh RETURN VALUES 66Function 67.Fn dwarf_formflag 68returns 69.Dv DW_DLV_OK 70on success. 71In case of an error, it returns 72.Dv DW_DLV_ERROR 73and sets argument 74.Fa err . 75.Sh ERRORS 76Function 77.Fn dwarf_formflag 78may fail with the following errors: 79.Bl -tag -width ".Bq Er DW_DLE_ATTR_FORM_BAD" 80.It Bq Er DW_DLE_ARGUMENT 81Either of arguments 82.Fa attr 83or 84.Fa ret 85was 86.Dv NULL . 87.It Bq Er DW_DLE_ATTR_FORM_BAD 88The attribute referenced by argument 89.Fa attr 90was not of a permitted kind. 91.El 92.Sh SEE ALSO 93.Xr dwarf 3 , 94.Xr dwarf_attr 3 , 95.Xr dwarf_formblock 3 , 96.Xr dwarf_formref 3 , 97.Xr dwarf_formsdata 3 , 98.Xr dwarf_formsig8 3 , 99.Xr dwarf_formstring 3 , 100.Xr dwarf_formudata 3 , 101.Xr dwarf_hasattr 3 102