All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
$Id: dwarf_formudata.3 3640 2018-10-14 14:09:13Z jkoshy $
.Dd June 21, 2010 .Dt DWARF_FORMUDATA 3 .Os .Sh NAME .Nm dwarf_formudata , .Nm dwarf_formsdata .Nd return the value of a CONSTANT class attribute .Sh LIBRARY .Lb libdwarf .Sh SYNOPSIS n libdwarf.h .Ft int .Fo dwarf_formudata .Fa "Dwarf_Attribute attr" .Fa "Dwarf_Unsigned *ret" .Fa "Dwarf_Error *err" .Fc .Ft int .Fo dwarf_formsdata .Fa "Dwarf_Attribute attr" .Fa "Dwarf_Signed *ret" .Fa "Dwarf_Error *err" .Fc .Sh DESCRIPTION These functions return the value associated with a DWARF attribute describing a constant.
p Function .Fn dwarf_formudata sets the location pointed to by argument .Ar ret to the value of the attribute referenced by argument .Ar attr , treating the value as an unsigned quantity. Argument .Ar attr must have one of the following forms: .Dv DW_FORM_data1 , .Dv DW_FORM_data2 , .Dv DW_FORM_data4 , .Dv DW_FORM_data8 and .Dv DW_FORM_udata .
p Function .Fn dwarf_formsdata sets the location pointed to by argument .Ar ret to the value of the attribute referenced by argument .Ar attr , appropriately sign extended. Argument .Ar attr must have one of the following forms: .Dv DW_FORM_data1 , .Dv DW_FORM_data2 , .Dv DW_FORM_data4 , .Dv DW_FORM_data8 and .Dv DW_FORM_sdata .
p If argument .Ar err is not NULL, it will be used to return an error descriptor in case of an error. .Sh RETURN VALUES These functions return .Dv DW_DLV_OK on success. In case of an error, they return .Dv DW_DLV_ERROR and set argument .Ar err . .Sh ERRORS These functions may fail with the following errors: l -tag -width ".Bq Er DW_DLE_ATTR_FORM_BAD" t Bq Er DW_DLE_ARGUMENT Either of arguments .Ar attr or .Ar ret was NULL. t Bq Er DW_DLE_ATTR_FORM_BAD The attribute referenced by argument .Ar attr was not of a permitted kind. .El .Sh SEE ALSO .Xr dwarf 3 , .Xr dwarf_attr 3 , .Xr dwarf_formblock 3 , .Xr dwarf_formflag 3 , .Xr dwarf_formref 3 , .Xr dwarf_formsig8 3 , .Xr dwarf_formstring 3 , .Xr dwarf_hasattr 3