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#include "markup.h"
#include <util/stream/output.h>
#include <util/stream/mem.h>
#include <util/string/strip.h>
#include <util/string/cast.h>
using namespace NConfig;
#define DBG(x)
namespace {
#define MACHINE_DATA
#include "markupfsm.h"
#undef MACHINE_DATA
class IXmlCB {
public:
inline void DoTagOpen(const TStringBuf& key) {
DBG(Cerr << "topen" << key << Endl);
S_.push_back(key);
OnTagOpen(key);
}
inline void DoTagClose(const TStringBuf& key) {
DBG(Cerr << "tclose" << key << Endl);
if (S_.empty()) {
ythrow yexception() << "unbalanced tag";
}
if (S_.back() != key) {
ythrow yexception() << "unbalanced tag";
}
S_.pop_back();
OnTagClose();
}
inline void DoText(const TStringBuf& text) {
DBG(Cerr << "ttext" << text << Endl);
if (!!text) {
OnText(text);
}
}
inline void DoAttrKey(const TStringBuf& key) {
DBG(Cerr << "tattrkey" << key << Endl);
A_ = key;
}
inline void DoAttrValue(const TStringBuf& key) {
DBG(Cerr << "tattrvalue" << key << Endl);
if (!A_) {
ythrow yexception() << "dangling attribute";
}
OnAttr(A_, key);
A_ = TStringBuf();
}
virtual void OnTagOpen(const TStringBuf& key) = 0;
virtual void OnTagClose() = 0;
virtual void OnText(const TStringBuf& text) = 0;
virtual void OnAttr(const TStringBuf& key, const TStringBuf& value) = 0;
virtual ~IXmlCB() = default;
private:
TVector<TStringBuf> S_;
TStringBuf A_;
};
inline void Parse(TStringBuf s, IXmlCB* cb) {
const char* p = s.data();
const char* pe = s.end();
const char* eof = pe;
const char* l = p;
int cs;
TString cur;
#define MACHINE_INIT
#include "markupfsm.h"
#undef MACHINE_INIT
#define MACHINE_EXEC
#include "markupfsm.h"
#undef MACHINE_EXEC
if (cs < ParseXml_first_final) {
ythrow TConfigParseError() << "can not parse markup data at offset " << (p - s.data());
}
}
inline IValue* SmartValue(const TStringBuf& v) {
try {
return ConstructValue(FromString<ui64>(v));
} catch (...) {
}
try {
return ConstructValue(FromString<i64>(v));
} catch (...) {
}
try {
return ConstructValue(FromString<double>(v));
} catch (...) {
}
try {
return ConstructValue(FromString<bool>(v));
} catch (...) {
}
return ConstructValue(ToString(v));
}
inline TConfig Parse(TStringBuf s0) {
struct TXmlParser: public IXmlCB {
inline TXmlParser()
: Root(ConstructValue(TDict()))
{
S.push_back(&Root);
}
void OnTagOpen(const TStringBuf& key) override {
*Push(key) = ConstructValue(TDict());
}
void OnTagClose() override {
S.pop_back();
}
static inline bool IsWS(char ch) {
switch (ch) {
case ' ':
case '\t':
case '\r':
case '\n':
case ':':
return true;
}
return false;
}
void OnText(const TStringBuf& text) override {
TMemoryInput mi(text.data(), text.size());
TString line;
while (mi.ReadLine(line)) {
DBG(Cerr << line << Endl);
TStringBuf s = StripString(TStringBuf(line));
DBG(Cerr << s << Endl);
if (!s) {
continue;
}
const char* b = s.data();
const char* c = b;
const char* e = s.end();
while (c < e && !IsWS(*c)) {
++c;
}
const TStringBuf key(b, c);
while (c < e && IsWS(*c)) {
++c;
}
const TStringBuf value(c, e);
if (!key) {
continue;
}
DBG(Cerr << key << " " << value << Endl);
SetAttr(key, value);
}
}
void OnAttr(const TStringBuf& key, const TStringBuf& value) override {
SetAttr(key, value);
}
inline void SetAttr(const TStringBuf& key, const TStringBuf& value) {
Dict()[ToString(key)] = SmartValue(value);
}
inline TConfig* Top() {
return S.back();
}
inline TConfig* Push(const TStringBuf& key) {
TDict& d = Dict();
const TString k = ToString(key);
if (d.find(k) == d.end()) {
S.push_back(&d[k]);
} else {
TConfig tmp = d[k];
if (tmp.IsA<TArray>()) {
TArray& arr = d[k].GetNonConstant<TArray>();
arr.push_back(TConfig());
S.push_back(&arr.back());
} else {
d[k] = ConstructValue(TArray());
TArray& arr = d[k].GetNonConstant<TArray>();
arr.push_back(tmp);
arr.push_back(TConfig());
S.push_back(&arr.back());
}
}
return Top();
}
inline TDict& Dict() {
try {
return Top()->GetNonConstant<TDict>();
} catch (...) {
}
return Top()->Get<TArray>().back().GetNonConstant<TDict>();
}
TConfig Root;
TVector<TConfig*> S;
};
TXmlParser cb;
Parse(s0, &cb);
return cb.Root;
}
}
TConfig NConfig::ParseRawMarkup(IInputStream& in) {
return Parse(in.ReadAll());
}
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