1.\" Copyright (c) 2010 Joseph Koshy 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $Id: dwarf_formflag.3 3640 2018-10-14 14:09:13Z jkoshy $ 26.\" 27.Dd June 21, 2010 28.Dt DWARF_FORMFLAG 3 29.Os 30.Sh NAME 31.Nm dwarf_formflag 32.Nd return the value of a BOOLEAN class attribute 33.Sh LIBRARY 34.Lb libdwarf 35.Sh SYNOPSIS 36.In libdwarf.h 37.Ft int 38.Fo dwarf_formflag 39.Fa "Dwarf_Attribute attr" 40.Fa "Dwarf_Bool *ret" 41.Fa "Dwarf_Error *err" 42.Fc 43.Sh DESCRIPTION 44Function 45.Fn dwarf_formflag 46sets the location pointed to by argument 47.Ar ret 48to 1 if the attribute referenced by argument 49.Ar attr 50has a non-zero value, or 0 otherwise. 51The form of argument 52.Ar attr 53must be one of 54.Dv DW_FORM_flag 55or 56.Dv DW_FORM_flag_present . 57.Pp 58If argument 59.Ar err 60is not NULL, it will be used to return an error descriptor in case 61of an error. 62.Sh RETURN VALUES 63Function 64.Fn dwarf_formflag 65returns 66.Dv DW_DLV_OK 67on success. 68In case of an error, it returns 69.Dv DW_DLV_ERROR 70and sets argument 71.Ar err . 72.Sh ERRORS 73Function 74.Fn dwarf_formflag 75may fail with the following errors: 76.Bl -tag -width ".Bq Er DW_DLE_ATTR_FORM_BAD" 77.It Bq Er DW_DLE_ARGUMENT 78Either of arguments 79.Ar attr 80or 81.Ar ret 82was NULL. 83.It Bq Er DW_DLE_ATTR_FORM_BAD 84The attribute referenced by argument 85.Ar attr 86was not of a permitted kind. 87.El 88.Sh SEE ALSO 89.Xr dwarf 3 , 90.Xr dwarf_attr 3 , 91.Xr dwarf_formblock 3 , 92.Xr dwarf_formref 3 , 93.Xr dwarf_formsdata 3 , 94.Xr dwarf_formsig8 3 , 95.Xr dwarf_formstring 3 , 96.Xr dwarf_formudata 3 , 97.Xr dwarf_hasattr 3 98