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Improve performance of printf functions

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This commit is contained in:
Justine Tunney 2021-04-24 13:58:34 -07:00
parent b107d2709f
commit dc6d11a031
39 changed files with 577 additions and 650 deletions
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58
net/http/isacceptablehost.c
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@ -19,6 +19,26 @@
#include "libc/str/str.h"
#include "net/http/http.h"
// -_0-9A-Za-z
static const char kHostChars[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x00
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x10
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, // 0x20
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 0x30
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x40
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, // 0x50
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x60
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, // 0x70
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x80
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x90
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xa0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xb0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xc0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xd0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xe0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0xf0
};
/**
* Returns true if host seems legit.
*
@ -49,33 +69,35 @@
*/
bool IsAcceptableHost(const char *s, size_t n) {
size_t i;
bool isip;
int c, b, j;
if (n == -1) n = s ? strlen(s) : 0;
if (!n) return true;
for (isip = true, b = j = i = 0; i < n; ++i) {
for (b = j = i = 0; i < n; ++i) {
c = s[i] & 255;
if (c == '.' && (!i || s[i - 1] == '.')) {
return false;
} else if (!(isalnum(c) || c == '-' || c == '_' || c == '.')) {
return false;
}
if (isip) {
if (isdigit(c)) {
b *= 10;
b += c - '0';
if (b > 255) {
if (isdigit(c)) {
b *= 10;
b += c - '0';
if (b > 255) {
return false;
}
} else if (c == '.') {
if (!i || s[i - 1] == '.') return false;
b = 0;
++j;
} else {
for (;;) {
if (!kHostChars[c] && (c != '.' || (!i || s[i - 1] == '.'))) {
return false;
}
} else if (c == '.') {
b = 0;
++j;
} else {
isip = false;
if (++i < n) {
c = s[i] & 255;
} else {
return true;
}
}
}
}
if (isip && j != 3) return false;
if (j != 3) return false;
if (i && s[i - 1] == '.') return false;
return true;
}