mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-23 13:52:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Add more missing libc functionality

Browse source
This commit is contained in:
Justine Tunney 2022-08-06 09:56:17 -07:00
parent cf93ecbbb2
commit a8cf0f7e89
74 changed files with 6981 additions and 105 deletions
Download patch file Download diff file Expand all files Collapse all files

36
test/libc/str/strstr_test.c
View file

@ -30,8 +30,19 @@
#define MAKESTRING(NAME, VALUE) \
char *NAME = strcpy(malloc(sizeof(VALUE) + 16), VALUE)
char *strstr_kmp(const char *haystak, const char *needle) {
return memmem(haystak, strlen(haystak), needle, strlen(needle));
char *strstr_naive(const char *haystack, const char *needle) {
size_t i;
unsigned k, m;
if (haystack == needle || !*needle) return haystack;
for (;;) {
for (i = 0;; ++i) {
if (!needle[i]) return (/*unconst*/ char *)haystack;
if (!haystack[i]) break;
if (needle[i] != haystack[i]) break;
}
if (!*haystack++) break;
}
return 0;
}
TEST(strstr, test_emptyString_isFoundAtBeginning) {
@ -84,7 +95,28 @@ TEST(strstr, test) {
ASSERT_STREQ("x", strstr("x", "x"));
}
/*
* strstr naive l: 103,057c 33,287ns m: 47,035c 15,192ns
* strstr l: 3,186c 1,029ns m: 3,218c 1,039ns
* strstr torture 1 l: 27c 9ns m: 61c 20ns
* strstr torture 2 l: 2,322c 750ns m: 2,362c 763ns
* strstr torture 4 l: 2,407c 777ns m: 2,448c 791ns
* strstr torture 8 l: 2,803c 905ns m: 2,862c 924ns
* strstr torture 16 l: 4,559c 1,473ns m: 3,614c 1,167ns
* strstr torture 32 l: 5,324c 1,720ns m: 5,577c 1,801ns
*
* strcasestr naive l: 129,908c 41,959ns m: 155,420c 50,200ns
* strcasestr l: 33,464c 10,809ns m: 31,636c 10,218ns
* strcasestr tort 1 l: 38c 12ns m: 69c 22ns
* strcasestr tort 2 l: 2,544c 822ns m: 2,580c 833ns
* strcasestr tort 4 l: 2,745c 887ns m: 2,767c 894ns
* strcasestr tort 8 l: 4,198c 1,356ns m: 4,216c 1,362ns
* strcasestr tort 16 l: 7,402c 2,391ns m: 7,487c 2,418ns
* strcasestr tort 32 l: 13,772c 4,448ns m: 12,945c 4,181ns
*/
BENCH(strstr, bench) {
EZBENCH2("strstr naive", donothing,
EXPROPRIATE(strstr_naive(kHyperion, "THE END")));
EZBENCH2("strstr", donothing, EXPROPRIATE(strstr(kHyperion, "THE END")));
EZBENCH2("strstr torture 1", donothing,
EXPROPRIATE(strstr(