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basic_parser optimizations

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This commit is contained in:
Vinnie Falco
2017-07-20 08:15:29 -07:00
parent b9597e21a4
commit f3eaa409d1
4 changed files with 107 additions and 63 deletions
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include/beast/http/impl/basic_parser.ipp
+48 -12
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@@ -21,6 +21,40 @@
namespace beast {
namespace http {
namespace detail {
template<class FwdIt>
inline
FwdIt
skip_ows2(FwdIt it, FwdIt const& end)
{
while(it != end)
{
if(*it != ' ' && *it != '\t')
break;
++it;
}
return it;
}
template<class RanIt>
inline
RanIt
skip_ows_rev2(
RanIt it, RanIt const& first)
{
while(it != first)
{
auto const c = it[-1];
if(c != ' ' && c != '\t')
break;
--it;
}
return it;
}
} // detail
template<bool isRequest, class Derived>
template<class OtherDerived>
basic_parser<isRequest, Derived>::
@@ -265,10 +299,8 @@ parse_header(char const*& p,
ec = http::error::need_more;
return;
}
auto const term = find_eom(
p + skip_, p + n, ec);
if(ec)
return;
auto const term =
find_eom(p + skip_, p + n);
if(! term)
{
skip_ = n - 3;
@@ -328,7 +360,13 @@ parse_header(char const*& p, char const* term,
}
auto const version = parse_version(p);
if(version < 0 || ! parse_crlf(p))
if(version < 0)
{
ec = error::bad_version;
return;
}
if(! parse_crlf(p))
{
ec = error::bad_version;
return;
@@ -595,9 +633,7 @@ parse_chunk_header(char const*& p0,
BOOST_ASSERT(! ec);
}
auto eom = find_eom(p0 + skip_, pend, ec);
if(ec)
return;
auto eom = find_eom(p0 + skip_, pend);
if(! eom)
{
BOOST_ASSERT(n >= 3);
@@ -688,8 +724,8 @@ parse_fields(char const*& p,
*term != '\t')
{
auto it2 = term - 2;
detail::skip_ows(p, it2);
detail::skip_ows_rev(it2, p);
p = detail::skip_ows2(p, it2);
it2 = detail::skip_ows_rev2(it2, p);
auto const f = string_to_field(name);
auto const value = make_string(p, it2);
do_field(f, value, ec);
@@ -706,7 +742,7 @@ parse_fields(char const*& p,
for(;;)
{
auto const it2 = term - 2;
detail::skip_ows(p, it2);
p = detail::skip_ows2(p, it2);
if(p != it2)
break;
p = term;
@@ -729,7 +765,7 @@ parse_fields(char const*& p,
if(*p != ' ' && *p != '\t')
break;
s.push_back(' ');
detail::skip_ows(p, term - 2);
p = detail::skip_ows2(p, term - 2);
term = find_eol(p, last, ec);
if(ec)
return;