Home | History | Annotate | Line # | Download | only in libdwarf
dwarf_str.c revision 1.1 
      1 /*-
      2  * Copyright (c) 2009 Kai Wang
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     24  * SUCH DAMAGE.
     25  */
     26 
     27 #include "_libdwarf.h"
     28 
     29 ELFTC_VCSID("Id: dwarf_str.c 2075 2011-10-27 03:47:28Z jkoshy ");
     30 
     31 int
     32 dwarf_get_str(Dwarf_Debug dbg, Dwarf_Off offset, char **string,
     33     Dwarf_Signed *ret_strlen, Dwarf_Error *error)
     34 {
     35 	Dwarf_Section *ds;
     36 
     37 	if (dbg == NULL || offset < 0 || string == NULL || ret_strlen == NULL) {
     38 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
     39 		return (DW_DLV_ERROR);
     40 	}
     41 
     42 	ds = _dwarf_find_section(dbg, ".debug_str");
     43 	if (ds == NULL) {
     44 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
     45 		return (DW_DLV_NO_ENTRY);
     46 	}
     47 
     48 	if ((Dwarf_Unsigned) offset > ds->ds_size) {
     49 		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
     50 		return (DW_DLV_ERROR);
     51 	}
     52 
     53 	if ((Dwarf_Unsigned) offset == ds->ds_size) {
     54 		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
     55 		return (DW_DLV_NO_ENTRY);
     56 	}
     57 
     58 	*string = (char *) ds->ds_data + offset;
     59 	*ret_strlen = strlen(*string);
     60 
     61 	return (DW_DLV_OK);
     62 }
     63