Kevacoin source tree
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

357 lines
7.9 KiB

// Copyright 2014 BitPay Inc.
// Copyright 2015 Bitcoin Core Developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <stdint.h>
#include <errno.h>
#include <iomanip>
#include <limits>
#include <sstream>
#include <stdexcept>
#include <stdlib.h>
#include <string.h>
#include "univalue.h"
namespace
{
static bool ParsePrechecks(const std::string& str)
{
if (str.empty()) // No empty string allowed
return false;
if (str.size() >= 1 && (json_isspace(str[0]) || json_isspace(str[str.size()-1]))) // No padding allowed
return false;
if (str.size() != strlen(str.c_str())) // No embedded NUL characters allowed
return false;
return true;
}
bool ParseInt32(const std::string& str, int32_t *out)
{
if (!ParsePrechecks(str))
return false;
char *endp = NULL;
errno = 0; // strtol will not set errno if valid
long int n = strtol(str.c_str(), &endp, 10);
if(out) *out = (int32_t)n;
// Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow
// we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
// platforms the size of these types may be different.
return endp && *endp == 0 && !errno &&
n >= std::numeric_limits<int32_t>::min() &&
n <= std::numeric_limits<int32_t>::max();
}
bool ParseInt64(const std::string& str, int64_t *out)
{
if (!ParsePrechecks(str))
return false;
char *endp = NULL;
errno = 0; // strtoll will not set errno if valid
long long int n = strtoll(str.c_str(), &endp, 10);
if(out) *out = (int64_t)n;
// Note that strtoll returns a *long long int*, so even if strtol doesn't report a over/underflow
// we still have to check that the returned value is within the range of an *int64_t*.
return endp && *endp == 0 && !errno &&
n >= std::numeric_limits<int64_t>::min() &&
n <= std::numeric_limits<int64_t>::max();
}
bool ParseDouble(const std::string& str, double *out)
{
if (!ParsePrechecks(str))
return false;
if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed
return false;
std::istringstream text(str);
text.imbue(std::locale::classic());
double result;
text >> result;
if(out) *out = result;
return text.eof() && !text.fail();
}
}
using namespace std;
const UniValue NullUniValue;
void UniValue::clear()
{
typ = VNULL;
val.clear();
keys.clear();
values.clear();
}
bool UniValue::setNull()
{
clear();
return true;
}
bool UniValue::setBool(bool val_)
{
clear();
typ = VBOOL;
if (val_)
val = "1";
return true;
}
static bool validNumStr(const string& s)
{
string tokenVal;
unsigned int consumed;
enum jtokentype tt = getJsonToken(tokenVal, consumed, s.c_str());
return (tt == JTOK_NUMBER);
}
bool UniValue::setNumStr(const string& val_)
{
if (!validNumStr(val_))
return false;
clear();
typ = VNUM;
val = val_;
return true;
}
bool UniValue::setInt(uint64_t val_)
{
ostringstream oss;
oss << val_;
return setNumStr(oss.str());
}
bool UniValue::setInt(int64_t val_)
{
ostringstream oss;
oss << val_;
return setNumStr(oss.str());
}
bool UniValue::setFloat(double val_)
{
ostringstream oss;
oss << std::setprecision(16) << val_;
bool ret = setNumStr(oss.str());
typ = VNUM;
return ret;
}
bool UniValue::setStr(const string& val_)
{
clear();
typ = VSTR;
val = val_;
return true;
}
bool UniValue::setArray()
{
clear();
typ = VARR;
return true;
}
bool UniValue::setObject()
{
clear();
typ = VOBJ;
return true;
}
bool UniValue::push_back(const UniValue& val_)
{
if (typ != VARR)
return false;
values.push_back(val_);
return true;
}
bool UniValue::push_backV(const std::vector<UniValue>& vec)
{
if (typ != VARR)
return false;
values.insert(values.end(), vec.begin(), vec.end());
return true;
}
bool UniValue::pushKV(const std::string& key, const UniValue& val_)
{
if (typ != VOBJ)
return false;
keys.push_back(key);
values.push_back(val_);
return true;
}
bool UniValue::pushKVs(const UniValue& obj)
{
if (typ != VOBJ || obj.typ != VOBJ)
return false;
for (unsigned int i = 0; i < obj.keys.size(); i++) {
keys.push_back(obj.keys[i]);
values.push_back(obj.values.at(i));
}
return true;
}
int UniValue::findKey(const std::string& key) const
{
for (unsigned int i = 0; i < keys.size(); i++) {
if (keys[i] == key)
return (int) i;
}
return -1;
}
bool UniValue::checkObject(const std::map<std::string,UniValue::VType>& t)
{
for (std::map<std::string,UniValue::VType>::const_iterator it = t.begin();
it != t.end(); ++it) {
int idx = findKey(it->first);
if (idx < 0)
return false;
if (values.at(idx).getType() != it->second)
return false;
}
return true;
}
const UniValue& UniValue::operator[](const std::string& key) const
{
if (typ != VOBJ)
return NullUniValue;
int index = findKey(key);
if (index < 0)
return NullUniValue;
return values.at(index);
}
const UniValue& UniValue::operator[](unsigned int index) const
{
if (typ != VOBJ && typ != VARR)
return NullUniValue;
if (index >= values.size())
return NullUniValue;
return values.at(index);
}
const char *uvTypeName(UniValue::VType t)
{
switch (t) {
case UniValue::VNULL: return "null";
case UniValue::VBOOL: return "bool";
case UniValue::VOBJ: return "object";
case UniValue::VARR: return "array";
case UniValue::VSTR: return "string";
case UniValue::VNUM: return "number";
}
// not reached
return NULL;
}
const UniValue& find_value(const UniValue& obj, const std::string& name)
{
for (unsigned int i = 0; i < obj.keys.size(); i++)
if (obj.keys[i] == name)
return obj.values.at(i);
return NullUniValue;
}
const std::vector<std::string>& UniValue::getKeys() const
{
if (typ != VOBJ)
throw std::runtime_error("JSON value is not an object as expected");
return keys;
}
const std::vector<UniValue>& UniValue::getValues() const
{
if (typ != VOBJ && typ != VARR)
throw std::runtime_error("JSON value is not an object or array as expected");
return values;
}
bool UniValue::get_bool() const
{
if (typ != VBOOL)
throw std::runtime_error("JSON value is not a boolean as expected");
return getBool();
}
const std::string& UniValue::get_str() const
{
if (typ != VSTR)
throw std::runtime_error("JSON value is not a string as expected");
return getValStr();
}
int UniValue::get_int() const
{
if (typ != VNUM)
throw std::runtime_error("JSON value is not an integer as expected");
int32_t retval;
if (!ParseInt32(getValStr(), &retval))
throw std::runtime_error("JSON integer out of range");
return retval;
}
int64_t UniValue::get_int64() const
{
if (typ != VNUM)
throw std::runtime_error("JSON value is not an integer as expected");
int64_t retval;
if (!ParseInt64(getValStr(), &retval))
throw std::runtime_error("JSON integer out of range");
return retval;
}
double UniValue::get_real() const
{
if (typ != VNUM)
throw std::runtime_error("JSON value is not a number as expected");
double retval;
if (!ParseDouble(getValStr(), &retval))
throw std::runtime_error("JSON double out of range");
return retval;
}
const UniValue& UniValue::get_obj() const
{
if (typ != VOBJ)
throw std::runtime_error("JSON value is not an object as expected");
return *this;
}
const UniValue& UniValue::get_array() const
{
if (typ != VARR)
throw std::runtime_error("JSON value is not an array as expected");
return *this;
}