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optimize HTTP method parsing for i386 and amd64

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This commit is contained in:
Igor Sysoev 2007-05-07 06:27:14 +00:00
parent c95f9970c5
commit b85f823e94
1 changed files with 80 additions and 30 deletions
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110
src/http/ngx_http_parse.c
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@ -32,6 +32,71 @@ static uint32_t usual[] = {
};
#if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
#define ngx_str3_cmp(m, c0, c1, c2, c3) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
#define ngx_str3Ocmp(m, c0, c1, c2, c3) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
#define ngx_str4cmp(m, c0, c1, c2, c3) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
#define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
&& m[4] == c4
#define ngx_str6cmp(m, c0, c1, c2, c3, c4, c5) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
&& (((uint32_t *) m)[1] & 0xffff) == ((c5 << 8) | c4)
#define ngx_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
&& ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
#define ngx_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
&& ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
#define ngx_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8) \
*(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
&& ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4) \
&& m[8] == c8
#else /* !(NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) */
#define ngx_str3_cmp(m, c0, c1, c2, c3) \
m[0] == c0 && m[1] == c1 && m[2] == c2
#define ngx_str3Ocmp(m, c0, c1, c2, c3) \
m[0] == c0 && m[2] == c2 && m[3] == c3
#define ngx_str4cmp(m, c0, c1, c2, c3) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3
#define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 && m[4] == c4
#define ngx_str6cmp(m, c0, c1, c2, c3, c4, c5) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
&& m[4] == c4 && m[5] == c5
#define ngx_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
&& m[4] == c4 && m[5] == c5 && m[6] == c6
#define ngx_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
&& m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7
#define ngx_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8) \
m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
&& m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7 && m[8] == c8
#endif
/* gcc, icc, msvc and others compile these switches as an jump table */
ngx_int_t
@ -92,12 +157,12 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
switch (p - m) {
case 3:
if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
if (ngx_str3_cmp(m, 'G', 'E', 'T', ' ')) {
r->method = NGX_HTTP_GET;
break;
}
if (m[0] == 'P' && m[1] == 'U' && m[2] == 'T') {
if (ngx_str3_cmp(m, 'P', 'U', 'T', ' ')) {
r->method = NGX_HTTP_PUT;
break;
}
@ -107,31 +172,29 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
case 4:
if (m[1] == 'O') {
if (m[0] == 'P' && m[2] == 'S' && m[3] == 'T') {
if (ngx_str3Ocmp(m, 'P', 'O', 'S', 'T')) {
r->method = NGX_HTTP_POST;
break;
}
if (m[0] == 'C' && m[2] == 'P' && m[3] == 'Y') {
if (ngx_str3Ocmp(m, 'C', 'O', 'P', 'Y')) {
r->method = NGX_HTTP_COPY;
break;
}
if (m[0] == 'M' && m[2] == 'V' && m[3] == 'E') {
if (ngx_str3Ocmp(m, 'M', 'O', 'V', 'E')) {
r->method = NGX_HTTP_MOVE;
break;
}
if (m[0] == 'L' && m[2] == 'C' && m[3] == 'K') {
if (ngx_str3Ocmp(m, 'L', 'O', 'C', 'K')) {
r->method = NGX_HTTP_LOCK;
break;
}
} else {
if (m[0] == 'H' && m[1] == 'E'
&& m[2] == 'A' && m[3] == 'D')
{
if (ngx_str4cmp(m, 'H', 'E', 'A', 'D')) {
r->method = NGX_HTTP_HEAD;
break;
}
@ -140,31 +203,23 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
break;
case 5:
if (m[0] == 'M' && m[1] == 'K'
&& m[2] == 'C' && m[3] == 'O' && m[4] == 'L')
{
if (ngx_str5cmp(m, 'M', 'K', 'C', 'O', 'L')) {
r->method = NGX_HTTP_MKCOL;
}
if (m[0] == 'T' && m[1] == 'R'
&& m[2] == 'A' && m[3] == 'C' && m[4] == 'E')
{
if (ngx_str5cmp(m, 'T', 'R', 'A', 'C', 'E')) {
r->method = NGX_HTTP_TRACE;
}
break;
case 6:
if (m[0] == 'D' && m[1] == 'E' && m[2] == 'L'
&& m[3] == 'E' && m[4] == 'T' && m[5] == 'E')
{
if (ngx_str6cmp(m, 'D', 'E', 'L', 'E', 'T', 'E')) {
r->method = NGX_HTTP_DELETE;
break;
}
if (m[0] == 'U' && m[1] == 'N' && m[2] == 'L'
&& m[3] == 'O' && m[4] == 'C' && m[5] == 'K')
{
if (ngx_str6cmp(m, 'U', 'N', 'L', 'O', 'C', 'K')) {
r->method = NGX_HTTP_UNLOCK;
break;
}
@ -172,9 +227,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
break;
case 7:
if (m[0] == 'O' && m[1] == 'P'
&& m[2] == 'T' && m[3] == 'I'
&& m[4] == 'O' && m[5] == 'N' && m[6] == 'S')
if (ngx_str7_cmp(m, 'O', 'P', 'T', 'I', 'O', 'N', 'S', ' '))
{
r->method = NGX_HTTP_OPTIONS;
}
@ -182,9 +235,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
break;
case 8:
if (m[0] == 'P' && m[1] == 'R'
&& m[2] == 'O' && m[3] == 'P' && m[4] == 'F'
&& m[5] == 'I' && m[6] == 'N' && m[7] == 'D')
if (ngx_str8cmp(m, 'P', 'R', 'O', 'P', 'F', 'I', 'N', 'D'))
{
r->method = NGX_HTTP_PROPFIND;
}
@ -192,9 +243,8 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
break;
case 9:
if (m[0] == 'P' && m[1] == 'R' && m[2] == 'O'
&& m[3] == 'P' && m[4] == 'P' && m[5] == 'A'
&& m[6] == 'T' && m[7] == 'C' && m[8] == 'H')
if (ngx_str9cmp(m,
'P', 'R', 'O', 'P', 'P', 'A', 'T', 'C', 'H'))
{
r->method = NGX_HTTP_PROPPATCH;
}