94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/decompressor.h>
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void *
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grub_memset (void *s, int c, grub_size_t len)
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{
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grub_uint8_t *ptr;
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for (ptr = s; len; ptr++, len--)
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*ptr = c;
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return s;
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}
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void *
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grub_memmove (void *dest, const void *src, grub_size_t n)
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{
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char *d = (char *) dest;
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const char *s = (const char *) src;
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if (d < s)
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while (n--)
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*d++ = *s++;
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else
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{
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d += n;
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s += n;
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while (n--)
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*--d = *--s;
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}
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return dest;
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}
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int
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grub_memcmp (const void *s1, const void *s2, grub_size_t n)
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{
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const unsigned char *t1 = s1;
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const unsigned char *t2 = s2;
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while (n--)
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{
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if (*t1 != *t2)
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return (int) *t1 - (int) *t2;
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t1++;
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t2++;
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}
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return 0;
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}
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void *grub_decompressor_scratch;
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void
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find_scratch (void *src, void *dst, unsigned long srcsize,
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unsigned long dstsize)
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{
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#ifdef _mips
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/* Decoding from ROM. */
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if (((grub_addr_t) src & 0x10000000))
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{
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grub_decompressor_scratch = (void *) ALIGN_UP((grub_addr_t) dst + dstsize,
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256);
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return;
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}
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#endif
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if ((char *) src + srcsize > (char *) dst + dstsize)
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grub_decompressor_scratch = (void *) ALIGN_UP ((grub_addr_t) src + srcsize,
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256);
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else
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grub_decompressor_scratch = (void *) ALIGN_UP ((grub_addr_t) dst + dstsize,
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256);
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return;
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}
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