/*      $NetBSD: dwarf_lineno.c,v 1.5 2024/03/03 17:37:31 christos Exp $        */

/*-
* Copyright (c) 2009,2011 Kai Wang
* 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.
*/

#include "_libdwarf.h"

__RCSID("$NetBSD: dwarf_lineno.c,v 1.5 2024/03/03 17:37:31 christos Exp $");
ELFTC_VCSID("Id: dwarf_lineno.c 2983 2014-02-09 00:24:31Z kaiwang27");

int
dwarf_srclines(Dwarf_Die die, Dwarf_Line **linebuf, Dwarf_Signed *linecount,
   Dwarf_Error *error)
{
       Dwarf_LineInfo li;
       Dwarf_Debug dbg;
       Dwarf_Line ln;
       Dwarf_CU cu;
       Dwarf_Attribute at;
       int i;

       dbg = die != NULL ? die->die_dbg : NULL;

       if (die == NULL || linebuf == NULL || linecount == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       if ((at = _dwarf_attr_find(die, DW_AT_stmt_list)) == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       cu = die->die_cu;
       if (cu->cu_lineinfo == NULL) {
               if (_dwarf_lineno_init(die, at->u[0].u64, error) !=
                   DW_DLE_NONE)
                       return (DW_DLV_ERROR);
       }
       if (cu->cu_lineinfo == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       li = cu->cu_lineinfo;
       *linecount = (Dwarf_Signed) li->li_lnlen;

       if (*linecount == 0) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       if (li->li_lnarray != NULL) {
               *linebuf = li->li_lnarray;
               return (DW_DLV_OK);
       }

       if ((li->li_lnarray = malloc(*linecount * sizeof(Dwarf_Line))) ==
           NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
               return (DW_DLV_ERROR);
       }

       for (i = 0, ln = STAILQ_FIRST(&li->li_lnlist);
            i < *linecount && ln != NULL; i++, ln = STAILQ_NEXT(ln, ln_next))
               li->li_lnarray[i] = ln;

       *linebuf = li->li_lnarray;

       return (DW_DLV_OK);
}

int
dwarf_srcfiles(Dwarf_Die die, char ***srcfiles, Dwarf_Signed *srccount,
   Dwarf_Error *error)
{
       Dwarf_LineInfo li;
       Dwarf_LineFile lf;
       Dwarf_Debug dbg;
       Dwarf_CU cu;
       Dwarf_Attribute at;
       int i;

       dbg = die != NULL ? die->die_dbg : NULL;

       if (die == NULL || srcfiles == NULL || srccount == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       if ((at = _dwarf_attr_find(die, DW_AT_stmt_list)) == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       cu = die->die_cu;
       if (cu->cu_lineinfo == NULL) {
               if (_dwarf_lineno_init(die, at->u[0].u64, error) !=
                   DW_DLE_NONE)
                       return (DW_DLV_ERROR);
       }
       if (cu->cu_lineinfo == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       li = cu->cu_lineinfo;
       *srccount = (Dwarf_Signed) li->li_lflen;

       if (*srccount == 0) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
               return (DW_DLV_NO_ENTRY);
       }

       if (li->li_lfnarray != NULL) {
               *srcfiles = li->li_lfnarray;
               return (DW_DLV_OK);
       }

       if ((li->li_lfnarray = malloc(*srccount * sizeof(char *))) == NULL) {
               DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
               return (DW_DLV_ERROR);
       }

       for (i = 0, lf = STAILQ_FIRST(&li->li_lflist);
            i < *srccount && lf != NULL; i++, lf = STAILQ_NEXT(lf, lf_next)) {
               if (lf->lf_fullpath)
                       li->li_lfnarray[i] = lf->lf_fullpath;
               else
                       li->li_lfnarray[i] = lf->lf_fname;
       }

       *srcfiles = li->li_lfnarray;

       return (DW_DLV_OK);
}

int
dwarf_linebeginstatement(Dwarf_Line ln, Dwarf_Bool *ret_bool,
   Dwarf_Error *error)
{

       if (ln == NULL || ret_bool == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_bool = ln->ln_stmt;

       return (DW_DLV_OK);
}

int
dwarf_lineendsequence(Dwarf_Line ln, Dwarf_Bool *ret_bool, Dwarf_Error *error)
{

       if (ln == NULL || ret_bool == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_bool = ln->ln_endseq;

       return (DW_DLV_OK);
}

int
dwarf_lineno(Dwarf_Line ln, Dwarf_Unsigned *ret_lineno, Dwarf_Error *error)
{

       if (ln == NULL || ret_lineno == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_lineno = ln->ln_lineno;

       return (DW_DLV_OK);
}

int
dwarf_line_srcfileno(Dwarf_Line ln, Dwarf_Unsigned *ret_fileno,
   Dwarf_Error *error)
{

       if (ln == NULL || ret_fileno == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_fileno = ln->ln_fileno;

       return (DW_DLV_OK);
}

int
dwarf_lineaddr(Dwarf_Line ln, Dwarf_Addr *ret_lineaddr, Dwarf_Error *error)
{

       if (ln == NULL || ret_lineaddr == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_lineaddr = ln->ln_addr;

       return (DW_DLV_OK);
}

int
dwarf_lineoff(Dwarf_Line ln, Dwarf_Signed *ret_lineoff, Dwarf_Error *error)
{

       if (ln == NULL || ret_lineoff == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       if (ln->ln_column == 0)
               *ret_lineoff = -1;
       else
               *ret_lineoff = (Dwarf_Signed) ln->ln_column;

       return (DW_DLV_OK);
}

int
dwarf_linesrc(Dwarf_Line ln, char **ret_linesrc, Dwarf_Error *error)
{
       Dwarf_LineInfo li;
       Dwarf_LineFile lf;
       int i;

       if (ln == NULL || ret_linesrc == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       li = ln->ln_li;
       assert(li != NULL);

       for (i = 1, lf = STAILQ_FIRST(&li->li_lflist);
            (Dwarf_Unsigned) i < ln->ln_fileno && lf != NULL;
            i++, lf = STAILQ_NEXT(lf, lf_next))
               ;

       if (lf == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_LINE_FILE_NUM_BAD);
               return (DW_DLV_ERROR);
       }

       if (lf->lf_fullpath) {
               *ret_linesrc = (char *) lf->lf_fullpath;
               return (DW_DLV_OK);
       }

       *ret_linesrc = lf->lf_fname;

       return (DW_DLV_OK);
}

int
dwarf_lineblock(Dwarf_Line ln, Dwarf_Bool *ret_bool, Dwarf_Error *error)
{

       if (ln == NULL || ret_bool == NULL) {
               DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
               return (DW_DLV_ERROR);
       }

       *ret_bool = ln->ln_bblock;

       return (DW_DLV_OK);
}

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