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/* This file is part of centaur.
*
* centaur is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License 2 as
* published by the Free Software Foundation.
* centaur is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with centaur. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __LIBELFU_GENERIC_H__
#define __LIBELFU_GENERIC_H__
#include <gelf.h>
#ifndef MIN
#define MIN(x, y) ((x) < (y) ? (x) : (y))
#endif
#ifndef MAX
#define MAX(x, y) ((x) > (y) ? (x) : (y))
#endif
#ifndef ROUNDUP
#define ROUNDUP(x, align) ((x) + ((align) - ((x) % (align))) % (align))
#endif
#define OFFS_END(off, sz) ((off) + (sz))
#define OVERLAPPING(off1, sz1, off2, sz2) \
(!((off1) == (off2) && ((sz1 == 0) || (sz2 == 0))) \
&& (((off1) <= (off2) && (off2) < OFFS_END((off1), (sz1))) \
|| ((off2) <= (off1) && (off1) < OFFS_END((off2), (sz2)))) \
)
#define FULLY_OVERLAPPING(off1, sz1, off2, sz2) \
(((off1) <= (off2) && OFFS_END((off2), (sz2)) <= OFFS_END((off1), (sz1))) \
|| ((off2) <= (off1) && OFFS_END((off1), (sz1)) <= OFFS_END((off2), (sz2))))
#define SCNFILESIZE(shdr) ((shdr)->sh_type == SHT_NOBITS ? 0 : (shdr)->sh_size)
#define PHDR_CONTAINS_SCN_IN_MEMORY(phdr, shdr) \
(((phdr)->p_vaddr) <= ((shdr)->sh_addr) \
&& OFFS_END((shdr)->sh_addr, (shdr)->sh_size) <= OFFS_END((phdr)->p_vaddr, (phdr)->p_memsz))
#define PHDR_CONTAINS_SCN_IN_FILE(phdr, shdr) \
(((phdr)->p_offset) <= ((shdr)->sh_offset) \
&& OFFS_END((shdr)->sh_offset, SCNFILESIZE(shdr)) <= OFFS_END((phdr)->p_offset, (phdr)->p_filesz))
#endif
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