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Collin Funk
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* bcopy.c -- copy memory.
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Copyright (C) 1992-2026 Free Software Foundation, Inc.
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This file 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
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by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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This file 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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#include <config.h>
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#include <stddef.h>
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/* Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate. */
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void
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bcopy (void const *source0, void *dest0, size_t length)
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{
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char const *source = source0;
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char *dest = dest0;
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if (source < dest)
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/* Moving from low mem to hi mem; start at end. */
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for (source += length, dest += length; length; --length)
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*--dest = *--source;
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else if (source != dest)
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/* Moving from hi mem to low mem; start at beginning. */
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for (; length; --length)
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*dest++ = *source++;
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}
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