cosmopolitan/test/libc/nexgen32e/lz4decode_test.c
Justine Tunney a4b455185b
Bring back gc() function
Renaming gc() to _gc() was a mistake since the better thing to do is put
it behind the _COSMO_SOURCE macro. We need this change because I haven't
wanted to use my amazing garbage collector ever since we renamed it. You
now need to define _COSMO_SOURCE yourself when using amalgamation header
and cosmocc users need to pass the -mcosmo flag to get the gc() function

Some other issues relating to cancelation have been fixed along the way.
We're also now putting cosmocc in a folder named `.cosmocc` so it can be
more safely excluded by grep --exclude-dir=.cosmocc --exclude-dir=o etc.
2024-01-08 10:26:28 -08:00

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/intrin/safemacros.internal.h"
#include "libc/log/check.h"
#include "libc/mem/gc.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/kompressor.h"
#include "libc/nexgen32e/lz4.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
TEST(lz4, decompress_emptyStringWithoutChecksum) {
/* lz4 -9 --content-size --no-frame-crc /tmp/empty - | hexdump -C */
static char kLz4Data[] = {0x04, 0x22, 0x4d, 0x18, 0x60, 0x40,
0x82, 0x00, 0x00, 0x00, 0x00};
char *src = memcpy(malloc(sizeof(kLz4Data)), kLz4Data, sizeof(kLz4Data));
char *dst = malloc(1);
*dst = 'z';
ASSERT_EQ(dst, lz4decode(dst, src));
ASSERT_EQ('z', *dst);
free(dst);
free(src);
}
TEST(lz4, decompress_oneLetterWithoutChecksum) {
/* printf a >oneletter */
/* lz4 -9 --content-size --no-frame-crc oneletter /dev/stdout | hexdump -C */
static char kLz4Data[] = {0x04, 0x22, 0x4d, 0x18, 0x68, 0x40, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x01,
0x00, 0x00, 0x80, 0x61, 0x00, 0x00, 0x00, 0x00};
char *src = memcpy(malloc(sizeof(kLz4Data)), kLz4Data, sizeof(kLz4Data));
char *dst = malloc(1);
ASSERT_EQ(dst + 1, lz4decode(dst, src));
ASSERT_EQ('a', *dst);
free(dst);
free(src);
}
TEST(lz4, decompress_runLengthDecode) {
/* printf aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >/tmp/a */
/* lz4 -9 --content-size --no-frame-crc /tmp/a - | hexdump -vC */
static char kLz4Data[] = {
0x04, 0x22, 0x4d, 0x18, 0x68, 0x40, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x30, 0x0b, 0x00, 0x00, 0x00, 0x1f, 0x61, 0x01, 0x00, 0x07,
0x50, 0x61, 0x61, 0x61, 0x61, 0x61, 0x00, 0x00, 0x00, 0x00};
char *src = memcpy(malloc(sizeof(kLz4Data)), kLz4Data, sizeof(kLz4Data));
const char *want = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
char *dst = malloc(strlen(want));
ASSERT_EQ(dst + strlen(want), lz4decode(dst, src));
ASSERT_STREQN(want, dst, strlen(want));
free(dst);
free(src);
}
TEST(lz4, zoneFileGmt) {
if (!fileexists("usr/share/zoneinfo.dict.lz4")) return;
char *dict = gc(xslurp("usr/share/zoneinfo.dict.lz4", 0));
char *gmt = gc(xslurp("usr/share/zoneinfo/GMT.lz4", 0));
size_t mapsize, gmtsize;
char *mapping, *gmtdata;
lz4decode(
(gmtdata = lz4decode(
(mapping = _mapanon(
(mapsize = roundup(
LZ4_FRAME_BLOCKCONTENTSIZE(lz4check(dict)) +
(gmtsize = LZ4_FRAME_BLOCKCONTENTSIZE(lz4check(gmt))),
FRAMESIZE)))),
dict)),
gmt);
ASSERT_BINEQ(
u"TZif2                                         GMT   TZif2   "
u"                               ♦°              GMT   ◙GMT0◙",
gmtdata);
munmap(mapping, mapsize);
}