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optimize the most frequent cases

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This commit is contained in:
Igor Sysoev 2006-10-28 12:04:43 +00:00
parent e23b4849b5
commit 0359ba8cc1
1 changed files with 76 additions and 21 deletions
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97
src/http/ngx_http_parse.c
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@ -9,6 +9,24 @@
#include <ngx_http.h>
static uint32_t usual[] =
{ 0xffffdbfe, /* 1111 1111 1111 1111 1101 1011 1111 1110 */
/* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
0x7fff37d6, /* 0111 1111 1111 1111 0011 0111 1101 0110 */
/* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
0xefffffff, /* 1110 1111 1111 1111 1111 1111 1111 1111 */
/* ~}| {zyx wvut srqp onml kjih gfed cba` */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */ };
/* gcc, icc, msvc and others compile these switches as an jump table */
ngx_int_t
@ -225,13 +243,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
/* check "/.", "//", "%", and "\" (Win32) in URI */
case sw_after_slash_in_uri:
c = (u_char) (ch | 0x20);
if (c >= 'a' && c <= 'z') {
state = sw_check_uri;
break;
}
if (ch >= '0' && ch <= '9') {
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
state = sw_check_uri;
break;
}
@ -291,12 +303,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
/* check "/", "%" and "\" (Win32) in URI */
case sw_check_uri:
c = (u_char) (ch | 0x20);
if (c >= 'a' && c <= 'z') {
break;
}
if (ch >= '0' && ch <= '9') {
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
break;
}
@ -350,6 +357,11 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
/* URI */
case sw_uri:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
break;
}
switch (ch) {
case ' ':
r->uri_end = p;
@ -793,6 +805,13 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
switch (state) {
case sw_usual:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
*u++ = ch;
ch = *p++;
break;
}
switch(ch) {
#if (NGX_WIN32)
case '\\':
@ -836,10 +855,19 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
*u++ = ch;
break;
}
ch = *p++;
break;
case sw_slash:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
state = sw_usual;
*u++ = ch;
ch = *p++;
break;
}
switch(ch) {
#if (NGX_WIN32)
case '\\':
@ -866,10 +894,19 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
*u++ = ch;
break;
}
ch = *p++;
break;
case sw_dot:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
state = sw_usual;
*u++ = ch;
ch = *p++;
break;
}
switch(ch) {
#if (NGX_WIN32)
case '\\':
@ -898,10 +935,19 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
*u++ = ch;
break;
}
ch = *p++;
break;
case sw_dot_dot:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
state = sw_usual;
*u++ = ch;
ch = *p++;
break;
}
switch(ch) {
#if (NGX_WIN32)
case '\\':
@ -938,11 +984,20 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
*u++ = ch;
break;
}
ch = *p++;
break;
#if (NGX_WIN32)
case sw_dot_dot_dot:
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
state = sw_usual;
*u++ = ch;
ch = *p++;
break;
}
switch(ch) {
case '\\':
case '/':
@ -977,6 +1032,7 @@ ngx_http_parse_complex_uri(ngx_http_request_t *r)
*u++ = ch;
break;
}
ch = *p++;
break;
#endif
@ -1111,6 +1167,10 @@ ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
ch = *p++;
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
continue;
}
if (ch == '?') {
args->len = len - 1;
args->data = p;
@ -1124,17 +1184,12 @@ ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
continue;
}
if (ch != '/'
if (len > 2 && (ch == '/'
#if (NGX_WIN32)
&& ch != '\\'
|| ch == '\\'
#endif
)
))
{
continue;
}
if (len > 2) {
/* detect "/../" */
if (p[0] == '.' && p[1] == '.' && p[2] == '/') {