1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
#include "logTypes.hpp"
namespace {
namespace {
constexpr auto BS_MAP = []() {
std::array<char, 'v' + 1> map {};
map.at('b') = '\b';
map.at('f') = '\f';
map.at('n') = '\n';
map.at('r') = '\r';
map.at('t') = '\t';
map.at('v') = '\v';
map.at('"') = '"';
map.at('\\') = '\\';
return map;
}();
scn::scan_expected<scn::ContextType::iterator>
parseEscapedString(std::string & value, scn::ContextType & ctx, const auto & start)
{
ctx.advance_to(start->begin());
while (true) {
if (auto closeQuote = scn::scan<>(ctx.range(), R"(")")) {
return closeQuote->begin();
}
if (auto plain = scn::scan<std::string>(ctx.range(), R"({:[^\"]})")) {
value.append(plain->value());
ctx.advance_to(plain->begin());
}
else if (auto hex = scn::scan<unsigned char>(ctx.range(), R"HEX(\x{:.2x})HEX")) {
value.append(1, static_cast<char>(hex->value()));
ctx.advance_to(hex->begin());
}
else if (auto escaped = scn::scan<std::string>(ctx.range(), R"ESC(\{:.1[bfnrtv"\]})ESC")) {
value.append(1, BS_MAP.at(static_cast<unsigned char>(escaped->value().front())));
ctx.advance_to(escaped->begin());
}
else {
return scn::unexpected(start.error());
}
}
return scn::unexpected(start.error());
}
}
}
namespace scn {
scan_expected<ContextType::iterator>
scanner<WebStat::QuotedString>::scan(WebStat::QuotedString & value, ContextType & ctx)
{
if (auto empty = scn::scan<>(ctx.range(), R"("")")) {
return empty->begin();
}
auto simple = scn::scan<std::string>(ctx.range(), R"("{:[^\"]}")");
if (simple) {
value = std::move(simple->value());
return simple->begin();
}
if (auto openQuote = scn::scan<>(ctx.range(), R"(")")) {
return parseEscapedString(value, ctx, openQuote);
}
return unexpected(simple.error());
}
scan_expected<ContextType::iterator>
scanner<WebStat::QueryString>::scan(WebStat::QueryString & value, ContextType & ctx)
{
if (auto null = scn::scan<>(ctx.range(), R"("")")) {
return null->begin();
}
auto empty = scn::scan<>(ctx.range(), R"("?")");
if (empty) {
value.emplace();
return empty->begin();
}
if (auto openQuoteQM = scn::scan<>(ctx.range(), R"("?)")) {
value.emplace();
return parseEscapedString(*value, ctx, openQuoteQM);
}
return unexpected(empty.error());
}
scan_expected<ContextType::iterator>
scanner<WebStat::CLFString>::scan(WebStat::CLFString & value, ContextType & ctx)
{
if (auto null = scn::scan<>(ctx.range(), R"("-")")) {
return null->begin();
}
return scn::scanner<WebStat::QuotedString>::scan(value.emplace(), ctx);
}
}
|
