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Add fixes performance and static web server

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This commit is contained in:
Justine Tunney 2020-10-05 23:11:49 -07:00
parent b6793d42d5
commit c45e46f871
108 changed files with 2927 additions and 819 deletions
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30
libc/alg/memmem.c
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@ -71,27 +71,25 @@ static size_t KnuthMorrisPratt(m, T, W, n, S)
* @param needlelen is its character count
* @return pointer to first result or NULL if not found
*/
void *(memmem)(const void *haystack_, size_t haystacklen, const void *needle_,
void *(memmem)(const void *haystackp, size_t haystacklen, const void *needlep,
size_t needlelen) {
long *T;
size_t i;
const char *haystack, *needle, *h;
haystack = haystack_;
needle = needle_;
needle = needlep;
haystack = haystackp;
if (needlelen > haystacklen) return NULL;
if (!needlelen) return (/*unconst*/ void *)haystack;
if (!needlelen) return haystack;
h = memchr(haystack, *needle, haystacklen);
if (!h || needlelen == 1) return (/*unconst*/ void *)h;
if (!h || needlelen == 1) return h;
haystacklen -= h - haystack;
long stacktmp[16];
void *freeme = NULL;
long *T = (needlelen + 1 < ARRAYLEN(stacktmp))
? &stacktmp[0]
: (freeme = malloc((needlelen + 1) * sizeof(long)));
KnuthMorrisPrattInit(needlelen, T, needle);
size_t i = KnuthMorrisPratt(needlelen, T, needle, haystacklen, h);
free(freeme);
if (i < haystacklen) {
return (/*unconst*/ char *)h + i * sizeof(char);
if (needlelen < haystacklen && memcmp(h, needle, needlelen) == 0) {
return h;
} else {
return NULL;
T = malloc((needlelen + 1) * sizeof(long));
KnuthMorrisPrattInit(needlelen, T, needle);
i = KnuthMorrisPratt(needlelen, T, needle, haystacklen, h);
free(T);
return i < haystacklen ? h + i * sizeof(char) : NULL;
}
}