1*0a6a1f1dSLionel Sambuc.\" $NetBSD: dwarf_hasattr.3,v 1.2 2014/03/09 16:58:04 christos Exp $ 2*0a6a1f1dSLionel Sambuc.\" 3*0a6a1f1dSLionel Sambuc.\" Copyright (c) 2010 Kai Wang 4*0a6a1f1dSLionel Sambuc.\" All rights reserved. 5*0a6a1f1dSLionel Sambuc.\" 6*0a6a1f1dSLionel Sambuc.\" Redistribution and use in source and binary forms, with or without 7*0a6a1f1dSLionel Sambuc.\" modification, are permitted provided that the following conditions 8*0a6a1f1dSLionel Sambuc.\" are met: 9*0a6a1f1dSLionel Sambuc.\" 1. Redistributions of source code must retain the above copyright 10*0a6a1f1dSLionel Sambuc.\" notice, this list of conditions and the following disclaimer. 11*0a6a1f1dSLionel Sambuc.\" 2. Redistributions in binary form must reproduce the above copyright 12*0a6a1f1dSLionel Sambuc.\" notice, this list of conditions and the following disclaimer in the 13*0a6a1f1dSLionel Sambuc.\" documentation and/or other materials provided with the distribution. 14*0a6a1f1dSLionel Sambuc.\" 15*0a6a1f1dSLionel Sambuc.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*0a6a1f1dSLionel Sambuc.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*0a6a1f1dSLionel Sambuc.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*0a6a1f1dSLionel Sambuc.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*0a6a1f1dSLionel Sambuc.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*0a6a1f1dSLionel Sambuc.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*0a6a1f1dSLionel Sambuc.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*0a6a1f1dSLionel Sambuc.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*0a6a1f1dSLionel Sambuc.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*0a6a1f1dSLionel Sambuc.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*0a6a1f1dSLionel Sambuc.\" SUCH DAMAGE. 26*0a6a1f1dSLionel Sambuc.\" 27*0a6a1f1dSLionel Sambuc.\" Id: dwarf_hasattr.3 2073 2011-10-27 03:30:47Z jkoshy 28*0a6a1f1dSLionel Sambuc.\" 29*0a6a1f1dSLionel Sambuc.Dd April 17, 2010 30*0a6a1f1dSLionel Sambuc.Os 31*0a6a1f1dSLionel Sambuc.Dt DWARF_HASATTR 3 32*0a6a1f1dSLionel Sambuc.Sh NAME 33*0a6a1f1dSLionel Sambuc.Nm dwarf_hasattr 34*0a6a1f1dSLionel Sambuc.Nd check for the presence of an attribute 35*0a6a1f1dSLionel Sambuc.Sh LIBRARY 36*0a6a1f1dSLionel Sambuc.Lb libdwarf 37*0a6a1f1dSLionel Sambuc.Sh SYNOPSIS 38*0a6a1f1dSLionel Sambuc.In libdwarf.h 39*0a6a1f1dSLionel Sambuc.Ft int 40*0a6a1f1dSLionel Sambuc.Fo dwarf_hasattr 41*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Die die" 42*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Half attr" 43*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Bool *ret_bool" 44*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Error *err" 45*0a6a1f1dSLionel Sambuc.Fc 46*0a6a1f1dSLionel Sambuc.Sh DESCRIPTION 47*0a6a1f1dSLionel SambucFunction 48*0a6a1f1dSLionel Sambuc.Fn dwarf_hasattr 49*0a6a1f1dSLionel Sambuctests whether the debugging information entry referenced in argument 50*0a6a1f1dSLionel Sambuc.Ar die 51*0a6a1f1dSLionel Sambuccontains the attribute named by argument 52*0a6a1f1dSLionel Sambuc.Ar attr . 53*0a6a1f1dSLionel SambucLegal values for argument 54*0a6a1f1dSLionel Sambuc.Ar attr 55*0a6a1f1dSLionel Sambucare those denoted by the 56*0a6a1f1dSLionel Sambuc.Dv DW_AT_* 57*0a6a1f1dSLionel Sambucconstants in the DWARF specification. 58*0a6a1f1dSLionel Sambuc.Pp 59*0a6a1f1dSLionel SambucIf the named attribute is present in the debugging information entry, 60*0a6a1f1dSLionel Sambucfunction 61*0a6a1f1dSLionel Sambuc.Fn dwarf_hasattr 62*0a6a1f1dSLionel Sambucreturns a non-zero value in the location pointed to by argument 63*0a6a1f1dSLionel Sambuc.Ar ret_bool . 64*0a6a1f1dSLionel SambucIf the named attribute is not present, a zero is written instead. 65*0a6a1f1dSLionel Sambuc.Pp 66*0a6a1f1dSLionel SambucIf argument 67*0a6a1f1dSLionel Sambuc.Ar err 68*0a6a1f1dSLionel Sambucis not NULL, it will be used to return an error descriptor in case 69*0a6a1f1dSLionel Sambucof an error. 70*0a6a1f1dSLionel Sambuc.Sh RETURN VALUES 71*0a6a1f1dSLionel SambucOn success, function 72*0a6a1f1dSLionel Sambuc.Fn dwarf_hasattr 73*0a6a1f1dSLionel Sambucreturns 74*0a6a1f1dSLionel Sambuc.Dv DW_DLV_OK . 75*0a6a1f1dSLionel SambucIn case of an error, it returns 76*0a6a1f1dSLionel Sambuc.Dv DW_DLV_ERROR 77*0a6a1f1dSLionel Sambucand sets argument 78*0a6a1f1dSLionel Sambuc.Ar err . 79*0a6a1f1dSLionel Sambuc.Sh ERRORS 80*0a6a1f1dSLionel SambucFunction 81*0a6a1f1dSLionel Sambuc.Fn dwarf_hasattr 82*0a6a1f1dSLionel Sambuccan fail with the following error: 83*0a6a1f1dSLionel Sambuc.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT" 84*0a6a1f1dSLionel Sambuc.It Bq Er DW_DLE_ARGUMENT 85*0a6a1f1dSLionel SambucEither of argument 86*0a6a1f1dSLionel Sambuc.Va die 87*0a6a1f1dSLionel Sambucor 88*0a6a1f1dSLionel Sambuc.Va ret_bool 89*0a6a1f1dSLionel Sambucwas NULL. 90*0a6a1f1dSLionel Sambuc.Sh SEE ALSO 91*0a6a1f1dSLionel Sambuc.Xr dwarf 3 , 92*0a6a1f1dSLionel Sambuc.Xr dwarf_attr 3 , 93*0a6a1f1dSLionel Sambuc.Xr dwarf_whatattr 3 94