java/src/main/java/com/jsoniter/output/StreamImplString.java at master · iCodeIN/java · GitHub

History

237 lines (220 loc) · 9.1 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

this implementations contains significant code from https://github.com/ngs-doo/dsl-json/blob/master/LICENSE

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,

this list of conditions and the following disclaimer in the documentation

and/or other materials provided with the distribution.

* Neither the name of Nova Generacija Softvera d.o.o. nor the names of its

contributors may be used to endorse or promote products derived from this

software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package com.jsoniter.output;

import com.jsoniter.spi.JsonException;

import java.io.IOException;

class StreamImplString {

private static final byte[] ITOA = new byte[]{

'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',

'a', 'b', 'c', 'd', 'e', 'f'};

private static final boolean[] CAN_DIRECT_WRITE = new boolean[128];

private final static int SURR1_FIRST = 0xD800;

private final static int SURR1_LAST = 0xDBFF;

private final static int SURR2_FIRST = 0xDC00;

private final static int SURR2_LAST = 0xDFFF;

static {

for (int i = 0; i < CAN_DIRECT_WRITE.length; i++) {

if (i > 31 && i < 126 && i != '"' && i != '\\') {

CAN_DIRECT_WRITE[i] = true;

}

public static final void writeString(final JsonStream stream, final String val) throws IOException {

int i = 0;

int valLen = val.length();

int toWriteLen = valLen;

int bufLengthMinusTwo = stream.buf.length - 2; // make room for the quotes

if (stream.count + toWriteLen > bufLengthMinusTwo) {

toWriteLen = bufLengthMinusTwo - stream.count;

}

if (toWriteLen < 0) {

stream.ensure(32);

if (stream.count + toWriteLen > bufLengthMinusTwo) {

toWriteLen = bufLengthMinusTwo - stream.count;

}

int n = stream.count;

stream.buf[n++] = '"';

// write string, the fast path, without utf8 and escape support

for (; i < toWriteLen; i++) {

char c = val.charAt(i);

try {

if (CAN_DIRECT_WRITE[c]) {

stream.buf[n++] = (byte) c;

} else {

break;

}

} catch (ArrayIndexOutOfBoundsException e) {

break;

}

if (i == valLen) {

stream.buf[n++] = '"';

stream.count = n;

return;

}

stream.count = n;

// for the remaining parts, we process them char by char

writeStringSlowPath(stream, val, i, valLen);

stream.write('"');

}

public static final void writeStringWithoutQuote(final JsonStream stream, final String val) throws IOException {

int i = 0;

int valLen = val.length();

int toWriteLen = valLen;

int bufLen = stream.buf.length;

if (stream.count + toWriteLen > bufLen) {

toWriteLen = bufLen - stream.count;

}

if (toWriteLen < 0) {

stream.ensure(32);

if (stream.count + toWriteLen > bufLen) {

toWriteLen = bufLen - stream.count;

}

int n = stream.count;

// write string, the fast path, without utf8 and escape support

for (; i < toWriteLen; i++) {

char c = val.charAt(i);

if (c > 31 && c != '"' && c != '\\' && c < 126) {

stream.buf[n++] = (byte) c;

} else {

break;

}

if (i == valLen) {

stream.count = n;

return;

}

stream.count = n;

// for the remaining parts, we process them char by char

writeStringSlowPath(stream, val, i, valLen);

}

private static void writeStringSlowPath(JsonStream stream, String val, int i, int valLen) throws IOException {

boolean escapeUnicode = stream.currentConfig().escapeUnicode();

if (escapeUnicode) {

for (; i < valLen; i++) {

int c = val.charAt(i);

if (c > 125) {

writeAsSlashU(stream, c);

} else {

writeAsciiChar(stream, c);

}

} else {

writeStringSlowPathWithoutEscapeUnicode(stream, val, i, valLen);

}

private static void writeStringSlowPathWithoutEscapeUnicode(JsonStream stream, String val, int i, int valLen) throws IOException {

int _surrogate;

for (; i < valLen; i++) {

int c = val.charAt(i);

if (c > 125) {

if (c < 0x800) { // 2-byte

stream.write(

(byte) (0xc0 | (c >> 6)),

(byte) (0x80 | (c & 0x3f))

);

} else { // 3 or 4 bytes

// Surrogates?

if (c < SURR1_FIRST || c > SURR2_LAST) {

stream.write(

(byte) (0xe0 | (c >> 12)),

(byte) (0x80 | ((c >> 6) & 0x3f)),

(byte) (0x80 | (c & 0x3f))

);

continue;

}

// Yup, a surrogate:

if (c > SURR1_LAST) { // must be from first range

throw new JsonException("illegalSurrogate");

}

_surrogate = c;

// and if so, followed by another from next range

if (i >= valLen) { // unless we hit the end?

break;

}

int firstPart = _surrogate;

_surrogate = 0;

// Ok, then, is the second part valid?

if (c < SURR2_FIRST || c > SURR2_LAST) {

throw new JsonException("Broken surrogate pair: first char 0x" + Integer.toHexString(firstPart) + ", second 0x" + Integer.toHexString(c) + "; illegal combination");

}

c = 0x10000 + ((firstPart - SURR1_FIRST) << 10) + (c - SURR2_FIRST);

if (c > 0x10FFFF) { // illegal in JSON as well as in XML

throw new JsonException("illegalSurrogate");

}

stream.write(

(byte) (0xf0 | (c >> 18)),

(byte) (0x80 | ((c >> 12) & 0x3f)),

(byte) (0x80 | ((c >> 6) & 0x3f)),

(byte) (0x80 | (c & 0x3f))

);

}

} else {

writeAsciiChar(stream, c);

}

private static void writeAsciiChar(JsonStream stream, int c) throws IOException {

switch (c) {

case '"':

stream.write((byte) '\\', (byte) '"');

break;

case '\\':

stream.write((byte) '\\', (byte) '\\');

break;

case '\b':

stream.write((byte) '\\', (byte) 'b');

break;

case '\f':

stream.write((byte) '\\', (byte) 'f');

break;

case '\n':

stream.write((byte) '\\', (byte) 'n');

break;

case '\r':

stream.write((byte) '\\', (byte) 'r');

break;

case '\t':

stream.write((byte) '\\', (byte) 't');

break;

default:

if (c < 32) {

writeAsSlashU(stream, c);

} else {

stream.write(c);

}

private static void writeAsSlashU(JsonStream stream, int c) throws IOException {

byte b4 = (byte) (c & 0xf);

byte b3 = (byte) (c >> 4 & 0xf);

byte b2 = (byte) (c >> 8 & 0xf);

byte b1 = (byte) (c >> 12 & 0xf);

stream.write((byte) '\\', (byte) 'u', ITOA[b1], ITOA[b2], ITOA[b3], ITOA[b4]);

}

java/src/main/java/com/jsoniter/output/StreamImplString.java at master · iCodeIN/java · GitHub

Uh oh!

Expand file tree

Breadcrumbs

StreamImplString.java

Latest commit

History

Breadcrumbs

StreamImplString.java

File metadata and controls