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/* Helper functions for form handling.
Copyright (C) 2000, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <dwarf.h>
#include <string.h>
#include <libdwarfP.h>
int
internal_function
__libdwarf_form_val_len (Dwarf_Debug dbg, Dwarf_CU_Info cu, Dwarf_Word form,
Dwarf_Small *valp, size_t *len, Dwarf_Error *error)
{
Dwarf_Small *saved;
Dwarf_Word u128;
switch (form)
{
case DW_FORM_addr:
case DW_FORM_strp:
case DW_FORM_ref_addr:
*len = cu->address_size;
break;
case DW_FORM_block1:
*len = *valp + 1;
break;
case DW_FORM_block2:
*len = read_2ubyte_unaligned (dbg, valp) + 2;
break;
case DW_FORM_block4:
*len = read_4ubyte_unaligned (dbg, valp) + 4;
break;
case DW_FORM_block:
saved = valp;
get_uleb128 (u128, valp);
*len = u128 + (valp - saved);
break;
case DW_FORM_ref1:
case DW_FORM_data1:
case DW_FORM_flag:
*len = 1;
break;
case DW_FORM_data2:
case DW_FORM_ref2:
*len = 2;
break;
case DW_FORM_data4:
case DW_FORM_ref4:
*len = 4;
break;
case DW_FORM_data8:
case DW_FORM_ref8:
*len = 8;
break;
case DW_FORM_string:
*len = strlen ((char *) valp) + 1;
break;
case DW_FORM_sdata:
case DW_FORM_udata:
case DW_FORM_ref_udata:
saved = valp;
get_uleb128 (u128, valp);
*len = valp - saved;
break;
case DW_FORM_indirect:
saved = valp;
get_uleb128 (u128, valp);
if (__libdwarf_form_val_len (dbg, cu, u128, valp, len, error)
!= DW_DLV_OK)
return DW_DLV_ERROR;
*len += valp - saved;
break;
default:
__libdwarf_error (dbg, error, DW_E_INVALID_DWARF);
return DW_DLV_ERROR;
}
return DW_DLV_OK;
}
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