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2008-07-27 Bean <bean123ch@gmail.com>

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* commands/crc.c: New file.

	* lib/crc.c: Likewise.

	* include/grub/lib/crc.h: Likewise.

	* util/grub-fstest.c: grub/hexdump.h => grub/lib/hexdump.h.

	* commands/hexdump.c: grub/hexdump.h => grub/lib/hexdump.h.
	(hexdump): Move this function to ...

	* lib/hexdump.c: ... here.

	* include/grub/hexdump.h: Renamed to ...

	* include/grub/lib/hexdump.h: ... this.

	* commands/loadenv.c: grub/envblk.h => grub/lib/envblk.h

	* util/grub-editenv.c: Likewise.

	* include/envblk.h: Renamed to ...

	* include/lib/envblk.h: ... this.

	* util/envblk.c: Renamed to ...

	* lib/envblk.c: ... this.

	* conf/common.rmk (grub_fstest_SOURCES): commands/hexdump.c =>
	lib/hexdump.c.
	(grub_editenv_SOURCES): util/envblk.c => lib/envblk.c
	(pkglib_MODULES): Add crc.mod.
	(hexdump_mod_SOURCES): Add lib/hexdump.c.
	(loadenv_mod_SOURCES): util/envblk.c => lib/envblk.c.
	(crc_mod_SOURCES): New macro.
	(crc_mod_CFLAGS): Likewise.
	(crc_mod_LDFLAGS): Likewise.

	* conf/i386-coreboot.rmk (grub_emu_SOURCES): Add lib/hexdump.c.

	* conf/i386-efi.rmk (grub_emu_SOURCES): Likewise.

	* conf/i386-pc.rmk (grub_emu_SOURCES): Likewise.

	* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Likewise.

	* conf/x86_64-efi.rmk (grub_emu_SOURCES): Likewise.
This commit is contained in:
bean 2008-07-27 13:51:30 +00:00
parent 8749e9e524
commit a85cd5a0b5
26 changed files with 479 additions and 125 deletions
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75
lib/crc.c Normal file
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@ -0,0 +1,75 @@
/* crc.c - crc function */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/types.h>
#include <grub/lib/crc.h>
static grub_uint32_t crc32_table [256];
static void
init_crc32_table (void)
{
auto grub_uint32_t reflect (grub_uint32_t ref, int len);
grub_uint32_t reflect (grub_uint32_t ref, int len)
{
grub_uint32_t result = 0;
int i;
for (i = 1; i <= len; i++)
{
if (ref & 1)
result |= 1 << (len - i);
ref >>= 1;
}
return result;
}
grub_uint32_t polynomial = 0x04c11db7;
int i, j;
for(i = 0; i < 256; i++)
{
crc32_table[i] = reflect(i, 8) << 24;
for (j = 0; j < 8; j++)
crc32_table[i] = (crc32_table[i] << 1) ^
(crc32_table[i] & (1 << 31) ? polynomial : 0);
crc32_table[i] = reflect(crc32_table[i], 32);
}
}
grub_uint32_t
grub_getcrc32 (grub_uint32_t crc, void *buf, int size)
{
int i;
grub_uint8_t *data = buf;
if (! crc32_table[1])
init_crc32_table ();
crc^= 0xffffffff;
for (i = 0; i < size; i++)
{
crc = (crc >> 8) ^ crc32_table[(crc & 0xFF) ^ *data];
data++;
}
return crc ^ 0xffffffff;
}