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/**************************************************************************
*
* Copyright 2015 VMware, Inc
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
#include "state_writer.hpp"
#include <string.h>
#include <stdint.h>
#include "ubjson.hpp"
namespace {
using namespace ubjson;
class UBJSONStateWriter : public StateWriter
{
private:
std::ostream &os;
public:
UBJSONStateWriter(std::ostream &_os) :
os(_os)
{
beginObject();
}
~UBJSONStateWriter()
{
endObject();
}
void
beginObject(void) override {
os.put(MARKER_OBJECT_BEGIN);
}
void
endObject(void) override {
os.put(MARKER_OBJECT_END);
}
inline void
_writeString(const char *s, size_t len) {
writeUInt(len);
// TODO: convert string from locale encoding to UTF-8
for (size_t i = 0; i < len; ++i) {
char c = s[i];
os.put((signed char)c >= 0 ? c : '?');
}
}
void
_writeString(const char *s) {
}
void
beginMember(const char * name) override {
size_t len = strlen(name);
_writeString(name, len);
}
void
endMember(void) override {
}
void
beginArray(void) override {
os.put(MARKER_ARRAY_BEGIN);
}
void
endArray(void) override {
os.put(MARKER_ARRAY_END);
}
void
writeString(const char *s) override {
size_t len = strlen(s);
if (len == 1 && (signed char)s[0] >= 0) {
os.put(MARKER_CHAR);
os.put(s[0]);
return;
}
os.put(MARKER_STRING);
_writeString(s, len);
}
void
writeBlob(const void *bytes, size_t size) override {
// Encode as a strongly-typed array of uint8 values
// http://ubjson.org/type-reference/binary-data/
// http://ubjson.org/type-reference/container-types/#optimized-format
beginArray();
os.put(MARKER_TYPE);
os.put(MARKER_UINT8);
os.put(MARKER_COUNT);
writeUInt(size);
os.write((const char *)bytes, size);
}
void
writeNull(void) override {
os.put(MARKER_NULL);
}
void
writeBool(bool b) override {
os.put(b ? MARKER_TRUE : MARKER_FALSE);
}
void
writeSInt(signed long long i) override {
if (INT8_MIN <= i && i <= INT8_MAX) {
os.put(MARKER_INT8);
os.put((char)i);
return;
}
if (0 <= i && i <= UINT8_MAX) {
os.put(MARKER_UINT8);
os.put((char)i);
return;
}
if (INT16_MIN <= i && i <= INT16_MAX) {
os.put(MARKER_INT16);
uint16_t u16 = bigEndian16((int16_t)i);
os.write((const char *)&u16, sizeof u16);
return;
}
if (INT32_MIN <= i && i <= INT32_MAX) {
os.put(MARKER_INT32);
uint32_t u32 = bigEndian32((int32_t)i);
os.write((const char *)&u32, sizeof u32);
return;
}
os.put(MARKER_INT64);
uint64_t u64 = bigEndian64(i);
os.write((const char *)&u64, sizeof u64);
}
void
writeUInt(unsigned long long u) override {
if (u <= UINT8_MAX) {
os.put(MARKER_UINT8);
uint8_t u8 = u;
os.put(u8);
return;
}
if (u <= INT16_MAX) {
os.put(MARKER_INT16);
uint16_t u16 = bigEndian16(u);
os.write((const char *)&u16, sizeof u16);
return;
}
if (u <= INT32_MAX) {
os.put(MARKER_INT32);
uint32_t u32 = bigEndian32(u);
os.write((const char *)&u32, sizeof u32);
return;
}
os.put(MARKER_INT64);
u = bigEndian64(u);
// XXX: We should fall back to high-precision when INT64_MAX < u <= UINT64_MAX?
os.write((const char *)&u, sizeof u);
}
void
writeFloat(float f) override {
os.put(MARKER_FLOAT32);
Float32 u;
u.f = f;
u.i = bigEndian32(u.i);
os.write((const char *)&u.i, sizeof u.i);
}
void
writeFloat(double f) override {
os.put(MARKER_FLOAT64);
Float64 u;
u.f = f;
u.i = bigEndian64(u.i);
os.write((const char *)&u.i, sizeof u.i);
}
};
}
StateWriter *
createUBJSONStateWriter(std::ostream &os)
{
return new UBJSONStateWriter(os);
}
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