111 lines
5.5 KiB
C
111 lines
5.5 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/alg/alg.h"
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#include "libc/bits/bits.h"
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#include "libc/str/str.h"
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#include "libc/testlib/testlib.h"
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TEST(comparator, testByteCompare) {
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char *b1 = tmalloc(1);
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char *b2 = tmalloc(1);
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/* sign doesn't matter */
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EXPECT_EQ(cmpsb(memcpy(b1, "a", 1), memcpy(b2, "a", 1)), 0);
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EXPECT_LT(cmpsb(memcpy(b1, "a", 1), memcpy(b2, "z", 1)), 0);
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EXPECT_GT(cmpsb(memcpy(b1, "z", 1), memcpy(b2, "a", 1)), 0);
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EXPECT_EQ(cmpub(memcpy(b1, "a", 1), memcpy(b2, "a", 1)), 0);
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EXPECT_LT(cmpub(memcpy(b1, "a", 1), memcpy(b2, "z", 1)), 0);
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EXPECT_GT(cmpub(memcpy(b1, "z", 1), memcpy(b2, "a", 1)), 0);
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/* sign matters */
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EXPECT_EQ(cmpsb(memcpy(b1, "\xf0", 1), memcpy(b2, "\xf0", 1)), 0);
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EXPECT_LT(cmpsb(memcpy(b1, "\xf0", 1), memcpy(b2, "\x10", 1)), 0);
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EXPECT_GT(cmpsb(memcpy(b1, "\x10", 1), memcpy(b2, "\xf0", 1)), 0);
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EXPECT_EQ(cmpub(memcpy(b1, "\xf0", 1), memcpy(b2, "\xf0", 1)), 0);
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EXPECT_GT(cmpub(memcpy(b1, "\xf0", 1), memcpy(b2, "\x10", 1)), 0);
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EXPECT_LT(cmpub(memcpy(b1, "\x10", 1), memcpy(b2, "\xf0", 1)), 0);
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/* two's complement bane */
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EXPECT_GT(cmpsb(memcpy(b1, "\x7f", 1), memcpy(b2, "\x80", 1)), 0);
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EXPECT_LT(cmpub(memcpy(b1, "\x7f", 1), memcpy(b2, "\x80", 1)), 0);
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tfree(b2);
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tfree(b1);
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}
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TEST(comparator, testWordCompare) {
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char *b1 = tmalloc(2);
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char *b2 = tmalloc(2);
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EXPECT_EQ(cmpsw(memcpy(b1, "\x00\x80", 2), memcpy(b2, "\x00\x80", 2)), 0);
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EXPECT_GT(cmpsw(memcpy(b1, "\x00\x7f", 2), memcpy(b2, "\x00\x80", 2)), 0);
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EXPECT_LT(cmpsw(memcpy(b1, "\x00\x80", 2), memcpy(b2, "\x00\x7f", 2)), 0);
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EXPECT_EQ(cmpuw(memcpy(b1, "\x00\x80", 2), memcpy(b2, "\x00\x80", 2)), 0);
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EXPECT_LT(cmpuw(memcpy(b1, "\x00\x7f", 2), memcpy(b2, "\x00\x80", 2)), 0);
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EXPECT_GT(cmpuw(memcpy(b1, "\x00\x80", 2), memcpy(b2, "\x00\x7f", 2)), 0);
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tfree(b2);
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tfree(b1);
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}
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TEST(comparator, testDoublewordCompare) {
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char *b1 = tmalloc(4);
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char *b2 = tmalloc(4);
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EXPECT_EQ(cmpsl(memcpy(b1, "\x00\x00\x00\x80", 4),
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memcpy(b2, "\x00\x00\x00\x80", 4)),
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0);
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EXPECT_GT(cmpsl(memcpy(b1, "\x00\x00\x00\x7f", 4),
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memcpy(b2, "\x00\x00\x00\x80", 4)),
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0);
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EXPECT_LT(cmpsl(memcpy(b1, "\x00\x00\x00\x80", 4),
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memcpy(b2, "\x00\x00\x00\x7f", 4)),
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0);
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EXPECT_EQ(cmpul(memcpy(b1, "\x00\x00\x00\x80", 4),
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memcpy(b2, "\x00\x00\x00\x80", 4)),
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0);
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EXPECT_LT(cmpul(memcpy(b1, "\x00\x00\x00\x7f", 4),
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memcpy(b2, "\x00\x00\x00\x80", 4)),
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0);
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EXPECT_GT(cmpul(memcpy(b1, "\x00\x00\x00\x80", 4),
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memcpy(b2, "\x00\x00\x00\x7f", 4)),
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0);
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tfree(b2);
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tfree(b1);
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}
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TEST(comparator, testQuadwordCompare) {
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char *b1 = tmalloc(8);
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char *b2 = tmalloc(8);
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EXPECT_EQ(cmpsq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x80", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x80", 8)),
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0);
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EXPECT_GT(cmpsq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x7f", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x80", 8)),
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0);
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EXPECT_LT(cmpsq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x80", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x7f", 8)),
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0);
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EXPECT_EQ(cmpuq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x80", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x80", 8)),
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0);
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EXPECT_LT(cmpuq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x7f", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x80", 8)),
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0);
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EXPECT_GT(cmpuq(memcpy(b1, "\x00\x00\x00\x00\x00\x00\x00\x80", 8),
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memcpy(b2, "\x00\x00\x00\x00\x00\x00\x00\x7f", 8)),
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0);
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tfree(b2);
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tfree(b1);
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}
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