57 lines
2.8 KiB
C
57 lines
2.8 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program 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; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ 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 this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/bits.h"
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#include "libc/bits/safemacros.h"
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#include "libc/str/str.h"
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#include "libc/testlib/testlib.h"
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#define N 256
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#define S 7
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TEST(memmove, overlapping) {
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for (size_t i = 0; i < N; i += S) {
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for (size_t j = 10; j < N; j += S) {
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char *b1 = tmalloc(N);
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char *b2 = tmalloc(N);
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size_t n = min(N - i, N - j);
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memcpy(b2, b1 + i, n);
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ASSERT_EQ(b1 + j, memmove(b1 + j, b1 + i, n));
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ASSERT_EQ(0, memcmp(b1 + j, b2, n));
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tfree(b2);
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tfree(b1);
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}
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}
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}
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TEST(memmove, overlappingDirect) {
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for (size_t i = 0; i < N; i += S) {
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for (size_t j = 10; j < N; j += S) {
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char *b1 = tmalloc(N);
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char *b2 = tmalloc(N);
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size_t n = min(N - i, N - j);
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memcpy(b2, b1 + i, n);
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ASSERT_EQ(b1 + j, (memmove)(b1 + j, b1 + i, n));
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ASSERT_EQ(0, memcmp(b1 + j, b2, n));
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tfree(b2);
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tfree(b1);
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}
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}
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}
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