12de3b87aSKai Wang.\" Copyright (c) 2010 Kai Wang 22de3b87aSKai Wang.\" All rights reserved. 32de3b87aSKai Wang.\" 42de3b87aSKai Wang.\" Redistribution and use in source and binary forms, with or without 52de3b87aSKai Wang.\" modification, are permitted provided that the following conditions 62de3b87aSKai Wang.\" are met: 72de3b87aSKai Wang.\" 1. Redistributions of source code must retain the above copyright 82de3b87aSKai Wang.\" notice, this list of conditions and the following disclaimer. 92de3b87aSKai Wang.\" 2. Redistributions in binary form must reproduce the above copyright 102de3b87aSKai Wang.\" notice, this list of conditions and the following disclaimer in the 112de3b87aSKai Wang.\" documentation and/or other materials provided with the distribution. 122de3b87aSKai Wang.\" 132de3b87aSKai Wang.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 142de3b87aSKai Wang.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 152de3b87aSKai Wang.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 162de3b87aSKai Wang.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 172de3b87aSKai Wang.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 182de3b87aSKai Wang.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 192de3b87aSKai Wang.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 202de3b87aSKai Wang.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 212de3b87aSKai Wang.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 222de3b87aSKai Wang.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 232de3b87aSKai Wang.\" SUCH DAMAGE. 242de3b87aSKai Wang.\" 25*ae500c1fSEd Maste.\" $Id: dwarf_hasattr.3 3640 2018-10-14 14:09:13Z jkoshy $ 262de3b87aSKai Wang.\" 272de3b87aSKai Wang.Dd April 17, 2010 282de3b87aSKai Wang.Dt DWARF_HASATTR 3 29*ae500c1fSEd Maste.Os 302de3b87aSKai Wang.Sh NAME 312de3b87aSKai Wang.Nm dwarf_hasattr 322de3b87aSKai Wang.Nd check for the presence of an attribute 332de3b87aSKai Wang.Sh LIBRARY 342de3b87aSKai Wang.Lb libdwarf 352de3b87aSKai Wang.Sh SYNOPSIS 362de3b87aSKai Wang.In libdwarf.h 372de3b87aSKai Wang.Ft int 382de3b87aSKai Wang.Fo dwarf_hasattr 392de3b87aSKai Wang.Fa "Dwarf_Die die" 402de3b87aSKai Wang.Fa "Dwarf_Half attr" 412de3b87aSKai Wang.Fa "Dwarf_Bool *ret_bool" 422de3b87aSKai Wang.Fa "Dwarf_Error *err" 432de3b87aSKai Wang.Fc 442de3b87aSKai Wang.Sh DESCRIPTION 452de3b87aSKai WangFunction 462de3b87aSKai Wang.Fn dwarf_hasattr 472de3b87aSKai Wangtests whether the debugging information entry referenced in argument 482de3b87aSKai Wang.Ar die 492de3b87aSKai Wangcontains the attribute named by argument 502de3b87aSKai Wang.Ar attr . 512de3b87aSKai WangLegal values for argument 522de3b87aSKai Wang.Ar attr 532de3b87aSKai Wangare those denoted by the 542de3b87aSKai Wang.Dv DW_AT_* 552de3b87aSKai Wangconstants in the DWARF specification. 562de3b87aSKai Wang.Pp 572de3b87aSKai WangIf the named attribute is present in the debugging information entry, 582de3b87aSKai Wangfunction 592de3b87aSKai Wang.Fn dwarf_hasattr 602de3b87aSKai Wangreturns a non-zero value in the location pointed to by argument 612de3b87aSKai Wang.Ar ret_bool . 622de3b87aSKai WangIf the named attribute is not present, a zero is written instead. 632de3b87aSKai Wang.Pp 642de3b87aSKai WangIf argument 652de3b87aSKai Wang.Ar err 662de3b87aSKai Wangis not NULL, it will be used to return an error descriptor in case 672de3b87aSKai Wangof an error. 682de3b87aSKai Wang.Sh RETURN VALUES 692de3b87aSKai WangOn success, function 702de3b87aSKai Wang.Fn dwarf_hasattr 712de3b87aSKai Wangreturns 722de3b87aSKai Wang.Dv DW_DLV_OK . 732de3b87aSKai WangIn case of an error, it returns 742de3b87aSKai Wang.Dv DW_DLV_ERROR 752de3b87aSKai Wangand sets argument 762de3b87aSKai Wang.Ar err . 772de3b87aSKai Wang.Sh ERRORS 782de3b87aSKai WangFunction 792de3b87aSKai Wang.Fn dwarf_hasattr 802de3b87aSKai Wangcan fail with the following error: 812de3b87aSKai Wang.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT" 822de3b87aSKai Wang.It Bq Er DW_DLE_ARGUMENT 832de3b87aSKai WangEither of argument 842de3b87aSKai Wang.Va die 852de3b87aSKai Wangor 862de3b87aSKai Wang.Va ret_bool 872de3b87aSKai Wangwas NULL. 88df7f007fSBaptiste Daroussin.El 892de3b87aSKai Wang.Sh SEE ALSO 902de3b87aSKai Wang.Xr dwarf 3 , 912de3b87aSKai Wang.Xr dwarf_attr 3 , 922de3b87aSKai Wang.Xr dwarf_whatattr 3 93