Squashed 'src/univalue/' content from commit 9ef5b78

git-subtree-dir: src/univalue
git-subtree-split: 9ef5b78c1998509b8f1ccd76f0aee15140e384be
This commit is contained in:
Jack Grigg
2017-02-10 02:18:44 +00:00
commit a4071034f6
75 changed files with 2340 additions and 0 deletions

2
lib/.gitignore vendored Normal file
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gen
.libs

359
lib/univalue.cpp Normal file
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// 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.data(), s.data() + s.size());
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;
}
bool UniValue::findKey(const std::string& key, size_t& ret) const
{
for (size_t i = 0; i < keys.size(); i++) {
if (keys[i] == key) {
ret = i;
return true;
}
}
return false;
}
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) {
size_t idx;
if (!findKey(it->first, idx))
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;
size_t index;
if (!findKey(key, index))
return NullUniValue;
return values.at(index);
}
const UniValue& UniValue::operator[](size_t 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;
}

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lib/univalue_escapes.h Normal file
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// Automatically generated file. Do not modify.
#ifndef BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H
#define BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H
static const char *escapes[256] = {
"\\u0000",
"\\u0001",
"\\u0002",
"\\u0003",
"\\u0004",
"\\u0005",
"\\u0006",
"\\u0007",
"\\b",
"\\t",
"\\n",
"\\u000b",
"\\f",
"\\r",
"\\u000e",
"\\u000f",
"\\u0010",
"\\u0011",
"\\u0012",
"\\u0013",
"\\u0014",
"\\u0015",
"\\u0016",
"\\u0017",
"\\u0018",
"\\u0019",
"\\u001a",
"\\u001b",
"\\u001c",
"\\u001d",
"\\u001e",
"\\u001f",
NULL,
NULL,
"\\\"",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
"\\\\",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
"\\u007f",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
};
#endif // BITCOIN_UNIVALUE_UNIVALUE_ESCAPES_H

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lib/univalue_read.cpp Normal file
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// Copyright 2014 BitPay Inc.
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <string.h>
#include <vector>
#include <stdio.h>
#include "univalue.h"
#include "univalue_utffilter.h"
using namespace std;
static bool json_isdigit(int ch)
{
return ((ch >= '0') && (ch <= '9'));
}
// convert hexadecimal string to unsigned integer
static const char *hatoui(const char *first, const char *last,
unsigned int& out)
{
unsigned int result = 0;
for (; first != last; ++first)
{
int digit;
if (json_isdigit(*first))
digit = *first - '0';
else if (*first >= 'a' && *first <= 'f')
digit = *first - 'a' + 10;
else if (*first >= 'A' && *first <= 'F')
digit = *first - 'A' + 10;
else
break;
result = 16 * result + digit;
}
out = result;
return first;
}
enum jtokentype getJsonToken(string& tokenVal, unsigned int& consumed,
const char *raw, const char *end)
{
tokenVal.clear();
consumed = 0;
const char *rawStart = raw;
while (raw < end && (json_isspace(*raw))) // skip whitespace
raw++;
if (raw >= end)
return JTOK_NONE;
switch (*raw) {
case '{':
raw++;
consumed = (raw - rawStart);
return JTOK_OBJ_OPEN;
case '}':
raw++;
consumed = (raw - rawStart);
return JTOK_OBJ_CLOSE;
case '[':
raw++;
consumed = (raw - rawStart);
return JTOK_ARR_OPEN;
case ']':
raw++;
consumed = (raw - rawStart);
return JTOK_ARR_CLOSE;
case ':':
raw++;
consumed = (raw - rawStart);
return JTOK_COLON;
case ',':
raw++;
consumed = (raw - rawStart);
return JTOK_COMMA;
case 'n':
case 't':
case 'f':
if (!strncmp(raw, "null", 4)) {
raw += 4;
consumed = (raw - rawStart);
return JTOK_KW_NULL;
} else if (!strncmp(raw, "true", 4)) {
raw += 4;
consumed = (raw - rawStart);
return JTOK_KW_TRUE;
} else if (!strncmp(raw, "false", 5)) {
raw += 5;
consumed = (raw - rawStart);
return JTOK_KW_FALSE;
} else
return JTOK_ERR;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
// part 1: int
string numStr;
const char *first = raw;
const char *firstDigit = first;
if (!json_isdigit(*firstDigit))
firstDigit++;
if ((*firstDigit == '0') && json_isdigit(firstDigit[1]))
return JTOK_ERR;
numStr += *raw; // copy first char
raw++;
if ((*first == '-') && (raw < end) && (!json_isdigit(*raw)))
return JTOK_ERR;
while (raw < end && json_isdigit(*raw)) { // copy digits
numStr += *raw;
raw++;
}
// part 2: frac
if (raw < end && *raw == '.') {
numStr += *raw; // copy .
raw++;
if (raw >= end || !json_isdigit(*raw))
return JTOK_ERR;
while (raw < end && json_isdigit(*raw)) { // copy digits
numStr += *raw;
raw++;
}
}
// part 3: exp
if (raw < end && (*raw == 'e' || *raw == 'E')) {
numStr += *raw; // copy E
raw++;
if (raw < end && (*raw == '-' || *raw == '+')) { // copy +/-
numStr += *raw;
raw++;
}
if (raw >= end || !json_isdigit(*raw))
return JTOK_ERR;
while (raw < end && json_isdigit(*raw)) { // copy digits
numStr += *raw;
raw++;
}
}
tokenVal = numStr;
consumed = (raw - rawStart);
return JTOK_NUMBER;
}
case '"': {
raw++; // skip "
string valStr;
JSONUTF8StringFilter writer(valStr);
while (raw < end) {
if ((unsigned char)*raw < 0x20)
return JTOK_ERR;
else if (*raw == '\\') {
raw++; // skip backslash
if (raw >= end)
return JTOK_ERR;
switch (*raw) {
case '"': writer.push_back('\"'); break;
case '\\': writer.push_back('\\'); break;
case '/': writer.push_back('/'); break;
case 'b': writer.push_back('\b'); break;
case 'f': writer.push_back('\f'); break;
case 'n': writer.push_back('\n'); break;
case 'r': writer.push_back('\r'); break;
case 't': writer.push_back('\t'); break;
case 'u': {
unsigned int codepoint;
if (raw + 1 + 4 >= end ||
hatoui(raw + 1, raw + 1 + 4, codepoint) !=
raw + 1 + 4)
return JTOK_ERR;
writer.push_back_u(codepoint);
raw += 4;
break;
}
default:
return JTOK_ERR;
}
raw++; // skip esc'd char
}
else if (*raw == '"') {
raw++; // skip "
break; // stop scanning
}
else {
writer.push_back(*raw);
raw++;
}
}
if (!writer.finalize())
return JTOK_ERR;
tokenVal = valStr;
consumed = (raw - rawStart);
return JTOK_STRING;
}
default:
return JTOK_ERR;
}
}
enum expect_bits {
EXP_OBJ_NAME = (1U << 0),
EXP_COLON = (1U << 1),
EXP_ARR_VALUE = (1U << 2),
EXP_VALUE = (1U << 3),
EXP_NOT_VALUE = (1U << 4),
};
#define expect(bit) (expectMask & (EXP_##bit))
#define setExpect(bit) (expectMask |= EXP_##bit)
#define clearExpect(bit) (expectMask &= ~EXP_##bit)
bool UniValue::read(const char *raw, size_t size)
{
clear();
uint32_t expectMask = 0;
vector<UniValue*> stack;
string tokenVal;
unsigned int consumed;
enum jtokentype tok = JTOK_NONE;
enum jtokentype last_tok = JTOK_NONE;
const char* end = raw + size;
do {
last_tok = tok;
tok = getJsonToken(tokenVal, consumed, raw, end);
if (tok == JTOK_NONE || tok == JTOK_ERR)
return false;
raw += consumed;
bool isValueOpen = jsonTokenIsValue(tok) ||
tok == JTOK_OBJ_OPEN || tok == JTOK_ARR_OPEN;
if (expect(VALUE)) {
if (!isValueOpen)
return false;
clearExpect(VALUE);
} else if (expect(ARR_VALUE)) {
bool isArrValue = isValueOpen || (tok == JTOK_ARR_CLOSE);
if (!isArrValue)
return false;
clearExpect(ARR_VALUE);
} else if (expect(OBJ_NAME)) {
bool isObjName = (tok == JTOK_OBJ_CLOSE || tok == JTOK_STRING);
if (!isObjName)
return false;
} else if (expect(COLON)) {
if (tok != JTOK_COLON)
return false;
clearExpect(COLON);
} else if (!expect(COLON) && (tok == JTOK_COLON)) {
return false;
}
if (expect(NOT_VALUE)) {
if (isValueOpen)
return false;
clearExpect(NOT_VALUE);
}
switch (tok) {
case JTOK_OBJ_OPEN:
case JTOK_ARR_OPEN: {
VType utyp = (tok == JTOK_OBJ_OPEN ? VOBJ : VARR);
if (!stack.size()) {
if (utyp == VOBJ)
setObject();
else
setArray();
stack.push_back(this);
} else {
UniValue tmpVal(utyp);
UniValue *top = stack.back();
top->values.push_back(tmpVal);
UniValue *newTop = &(top->values.back());
stack.push_back(newTop);
}
if (utyp == VOBJ)
setExpect(OBJ_NAME);
else
setExpect(ARR_VALUE);
break;
}
case JTOK_OBJ_CLOSE:
case JTOK_ARR_CLOSE: {
if (!stack.size() || (last_tok == JTOK_COMMA))
return false;
VType utyp = (tok == JTOK_OBJ_CLOSE ? VOBJ : VARR);
UniValue *top = stack.back();
if (utyp != top->getType())
return false;
stack.pop_back();
clearExpect(OBJ_NAME);
setExpect(NOT_VALUE);
break;
}
case JTOK_COLON: {
if (!stack.size())
return false;
UniValue *top = stack.back();
if (top->getType() != VOBJ)
return false;
setExpect(VALUE);
break;
}
case JTOK_COMMA: {
if (!stack.size() ||
(last_tok == JTOK_COMMA) || (last_tok == JTOK_ARR_OPEN))
return false;
UniValue *top = stack.back();
if (top->getType() == VOBJ)
setExpect(OBJ_NAME);
else
setExpect(ARR_VALUE);
break;
}
case JTOK_KW_NULL:
case JTOK_KW_TRUE:
case JTOK_KW_FALSE: {
UniValue tmpVal;
switch (tok) {
case JTOK_KW_NULL:
// do nothing more
break;
case JTOK_KW_TRUE:
tmpVal.setBool(true);
break;
case JTOK_KW_FALSE:
tmpVal.setBool(false);
break;
default: /* impossible */ break;
}
if (!stack.size()) {
*this = tmpVal;
break;
}
UniValue *top = stack.back();
top->values.push_back(tmpVal);
setExpect(NOT_VALUE);
break;
}
case JTOK_NUMBER: {
UniValue tmpVal(VNUM, tokenVal);
if (!stack.size()) {
*this = tmpVal;
break;
}
UniValue *top = stack.back();
top->values.push_back(tmpVal);
setExpect(NOT_VALUE);
break;
}
case JTOK_STRING: {
if (expect(OBJ_NAME)) {
UniValue *top = stack.back();
top->keys.push_back(tokenVal);
clearExpect(OBJ_NAME);
setExpect(COLON);
} else {
UniValue tmpVal(VSTR, tokenVal);
if (!stack.size()) {
*this = tmpVal;
break;
}
UniValue *top = stack.back();
top->values.push_back(tmpVal);
}
setExpect(NOT_VALUE);
break;
}
default:
return false;
}
} while (!stack.empty ());
/* Check that nothing follows the initial construct (parsed above). */
tok = getJsonToken(tokenVal, consumed, raw, end);
if (tok != JTOK_NONE)
return false;
return true;
}
bool UniValue::read(const char *raw) {
return read(raw, strlen(raw));
}

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// Copyright 2016 Wladimir J. van der Laan
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef UNIVALUE_UTFFILTER_H
#define UNIVALUE_UTFFILTER_H
#include <string>
/**
* Filter that generates and validates UTF-8, as well as collates UTF-16
* surrogate pairs as specified in RFC4627.
*/
class JSONUTF8StringFilter
{
public:
JSONUTF8StringFilter(std::string &s):
str(s), is_valid(true), codepoint(0), state(0), surpair(0)
{
}
// Write single 8-bit char (may be part of UTF-8 sequence)
void push_back(unsigned char ch)
{
if (state == 0) {
if (ch < 0x80) // 7-bit ASCII, fast direct pass-through
str.push_back(ch);
else if (ch < 0xc0) // Mid-sequence character, invalid in this state
is_valid = false;
else if (ch < 0xe0) { // Start of 2-byte sequence
codepoint = (ch & 0x1f) << 6;
state = 6;
} else if (ch < 0xf0) { // Start of 3-byte sequence
codepoint = (ch & 0x0f) << 12;
state = 12;
} else if (ch < 0xf8) { // Start of 4-byte sequence
codepoint = (ch & 0x07) << 18;
state = 18;
} else // Reserved, invalid
is_valid = false;
} else {
if ((ch & 0xc0) != 0x80) // Not a continuation, invalid
is_valid = false;
state -= 6;
codepoint |= (ch & 0x3f) << state;
if (state == 0)
push_back_u(codepoint);
}
}
// Write codepoint directly, possibly collating surrogate pairs
void push_back_u(unsigned int codepoint_)
{
if (state) // Only accept full codepoints in open state
is_valid = false;
if (codepoint_ >= 0xD800 && codepoint_ < 0xDC00) { // First half of surrogate pair
if (surpair) // Two subsequent surrogate pair openers - fail
is_valid = false;
else
surpair = codepoint_;
} else if (codepoint_ >= 0xDC00 && codepoint_ < 0xE000) { // Second half of surrogate pair
if (surpair) { // Open surrogate pair, expect second half
// Compute code point from UTF-16 surrogate pair
append_codepoint(0x10000 | ((surpair - 0xD800)<<10) | (codepoint_ - 0xDC00));
surpair = 0;
} else // Second half doesn't follow a first half - fail
is_valid = false;
} else {
if (surpair) // First half of surrogate pair not followed by second - fail
is_valid = false;
else
append_codepoint(codepoint_);
}
}
// Check that we're in a state where the string can be ended
// No open sequences, no open surrogate pairs, etc
bool finalize()
{
if (state || surpair)
is_valid = false;
return is_valid;
}
private:
std::string &str;
bool is_valid;
// Current UTF-8 decoding state
unsigned int codepoint;
int state; // Top bit to be filled in for next UTF-8 byte, or 0
// Keep track of the following state to handle the following section of
// RFC4627:
//
// To escape an extended character that is not in the Basic Multilingual
// Plane, the character is represented as a twelve-character sequence,
// encoding the UTF-16 surrogate pair. So, for example, a string
// containing only the G clef character (U+1D11E) may be represented as
// "\uD834\uDD1E".
//
// Two subsequent \u.... may have to be replaced with one actual codepoint.
unsigned int surpair; // First half of open UTF-16 surrogate pair, or 0
void append_codepoint(unsigned int codepoint_)
{
if (codepoint_ <= 0x7f)
str.push_back((char)codepoint_);
else if (codepoint_ <= 0x7FF) {
str.push_back((char)(0xC0 | (codepoint_ >> 6)));
str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
} else if (codepoint_ <= 0xFFFF) {
str.push_back((char)(0xE0 | (codepoint_ >> 12)));
str.push_back((char)(0x80 | ((codepoint_ >> 6) & 0x3F)));
str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
} else if (codepoint_ <= 0x1FFFFF) {
str.push_back((char)(0xF0 | (codepoint_ >> 18)));
str.push_back((char)(0x80 | ((codepoint_ >> 12) & 0x3F)));
str.push_back((char)(0x80 | ((codepoint_ >> 6) & 0x3F)));
str.push_back((char)(0x80 | (codepoint_ & 0x3F)));
}
}
};
#endif

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lib/univalue_write.cpp Normal file
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// Copyright 2014 BitPay Inc.
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <iomanip>
#include <sstream>
#include <stdio.h>
#include "univalue.h"
#include "univalue_escapes.h"
using namespace std;
static string json_escape(const string& inS)
{
string outS;
outS.reserve(inS.size() * 2);
for (unsigned int i = 0; i < inS.size(); i++) {
unsigned char ch = inS[i];
const char *escStr = escapes[ch];
if (escStr)
outS += escStr;
else
outS += ch;
}
return outS;
}
string UniValue::write(unsigned int prettyIndent,
unsigned int indentLevel) const
{
string s;
s.reserve(1024);
unsigned int modIndent = indentLevel;
if (modIndent == 0)
modIndent = 1;
switch (typ) {
case VNULL:
s += "null";
break;
case VOBJ:
writeObject(prettyIndent, modIndent, s);
break;
case VARR:
writeArray(prettyIndent, modIndent, s);
break;
case VSTR:
s += "\"" + json_escape(val) + "\"";
break;
case VNUM:
s += val;
break;
case VBOOL:
s += (val == "1" ? "true" : "false");
break;
}
return s;
}
static void indentStr(unsigned int prettyIndent, unsigned int indentLevel, string& s)
{
s.append(prettyIndent * indentLevel, ' ');
}
void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, string& s) const
{
s += "[";
if (prettyIndent)
s += "\n";
for (unsigned int i = 0; i < values.size(); i++) {
if (prettyIndent)
indentStr(prettyIndent, indentLevel, s);
s += values[i].write(prettyIndent, indentLevel + 1);
if (i != (values.size() - 1)) {
s += ",";
}
if (prettyIndent)
s += "\n";
}
if (prettyIndent)
indentStr(prettyIndent, indentLevel - 1, s);
s += "]";
}
void UniValue::writeObject(unsigned int prettyIndent, unsigned int indentLevel, string& s) const
{
s += "{";
if (prettyIndent)
s += "\n";
for (unsigned int i = 0; i < keys.size(); i++) {
if (prettyIndent)
indentStr(prettyIndent, indentLevel, s);
s += "\"" + json_escape(keys[i]) + "\":";
if (prettyIndent)
s += " ";
s += values.at(i).write(prettyIndent, indentLevel + 1);
if (i != (values.size() - 1))
s += ",";
if (prettyIndent)
s += "\n";
}
if (prettyIndent)
indentStr(prettyIndent, indentLevel - 1, s);
s += "}";
}