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/* strtab.c: parts containing a string table.
*
* Copyright (C) 1999,2001,2021 by Brian Raiter, under the GNU General
* Public License, version 2. No warranty. See COPYING for details.
*/
#include <stdlib.h>
#include <string.h>
#include <elf.h>
#include "elfparts.h"
#include "elfpartsi.h"
/* Set up the elfpart structure and allocate an empty string table.
*/
static bool strnew(elfpart *part)
{
part->shtype = SHT_STRTAB;
part->shname = ".strtab";
_resizepart(part, 1);
*(char*)part->part = '\0';
return true;
}
/* Set up the elfpart structure for a section header string table.
*/
static bool shnew(elfpart *part)
{
strnew(part);
part->shname = ".shstrtab";
return true;
}
/* Set up the elfpart structure for a dynamic string table.
*/
static bool dynnew(elfpart *part)
{
strnew(part);
part->shname = ".dynstr";
part->flags = PF_R;
return true;
}
/* Adds a string to a string table. The return value is the index
* of the string in the table.
*/
int addtostrtab(elfpart *part, char const *str)
{
char *strtab;
size_t pos, len;
if (!_validate(part->shtype == SHT_STRTAB, "not a string table"))
return -1;
if (!str || !*str)
return 0;
len = strlen(str) + 1;
pos = part->size;
strtab = _resizepart(part, part->size + len);
if (!strtab)
return -1;
memcpy(strtab + pos, str, len);
return pos;
}
/* The string table elfpart structures.
*/
elfpart part_strtab = { strnew, NULL, NULL, NULL };
elfpart part_dynstr = { dynnew, NULL, NULL, NULL };
elfpart part_shstrtab = { shnew, NULL, NULL, NULL };
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