##// END OF EJS Templates
implab » ImplabNet
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JSONWriter improvements
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r150:3258399cba83 v2
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@@ -2,6 +2,7
2 2 using System.Collections.Generic;
3 3 using System.IO;
4 4 using System.Globalization;
5 using System.Diagnostics;
5 6
6 7 namespace Implab.JSON {
7 8 public class JSONWriter {
@@ -12,10 +13,15 namespace Implab.JSON {
12 13 Stack<Context> m_contextStack = new Stack<Context>();
13 14 Context m_context;
14 15
16 const int BUFFER_SIZE = 64;
17
15 18 TextWriter m_writer;
16 19 readonly bool m_indent = true;
17 20 readonly int m_indentSize = 4;
21 readonly char[] m_buffer = new char[BUFFER_SIZE];
22 int m_bufferPos;
18 23
24 static readonly char [] _hex = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
19 25 static readonly char [] _escapeBKS,
20 26 _escapeFWD,
21 27 _escapeCR,
@@ -211,7 +217,13 namespace Implab.JSON {
211 217 void Write(bool value) {
212 218 m_writer.Write(value ? "true" : "false");
213 219 }
214
220
221 void FlushBuffer() {
222 if (m_bufferPos > 0) {
223 m_writer.Write(m_buffer, 0, m_bufferPos);
224 m_bufferPos = 0;
225 }
226 }
215 227
216 228 void Write(string value) {
217 229 if (value == null) {
@@ -219,46 +231,73 namespace Implab.JSON {
219 231 return;
220 232 }
221 233
234 Debug.Assert(m_bufferPos == 0);
235
222 236 var chars = value.ToCharArray();
223 m_writer.Write('"');
224
237 m_buffer[m_bufferPos++] = '"';
238
225 239 // Analysis disable once ForCanBeConvertedToForeach
226 240 for (int i = 0; i < chars.Length; i++) {
227 241 var ch = chars[i];
228 242
243 char[] escapeSeq;
244
229 245 switch (ch) {
230 246 case '\b':
231 m_writer.Write(_escapeBKS);
247 escapeSeq = _escapeBKS;
232 248 break;
233 249 case '\f':
234 m_writer.Write(_escapeFWD);
250 escapeSeq = _escapeFWD;
235 251 break;
236 252 case '\r':
237 m_writer.Write(_escapeCR);
253 escapeSeq = _escapeCR;
238 254 break;
239 255 case '\n':
240 m_writer.Write(_escapeNL);
256 escapeSeq = _escapeNL;
241 257 break;
242 258 case '\t':
243 m_writer.Write(_escapeTAB);
259 escapeSeq = _escapeTAB;
244 260 break;
245 261 case '\\':
246 m_writer.Write(_escapeBSLASH);
262 escapeSeq = _escapeBSLASH;
247 263 break;
248 264 case '"':
249 m_writer.Write(_escapeQ);
265 escapeSeq = _escapeQ;
250 266 break;
251 267 default:
252 268 if (ch < 0x20) {
253 m_writer.Write("\\u00{0:x2}",(int)ch);
269 if (m_bufferPos + 6 > BUFFER_SIZE)
270 FlushBuffer();
271
272 m_buffer[m_bufferPos++] = '\\';
273 m_buffer[m_bufferPos++] = 'u';
274 m_buffer[m_bufferPos++] = '0';
275 m_buffer[m_bufferPos++] = '0';
276 m_buffer[m_bufferPos++] = _hex[ch >> 4 & 0xf];
277 m_buffer[m_bufferPos++] = _hex[ch & 0xf];
278
254 279 } else {
255 m_writer.Write(ch);
280 if (m_bufferPos >= BUFFER_SIZE)
281 FlushBuffer();
282 m_buffer[m_bufferPos++] = ch;
256 283 }
257 break;
284 continue;
258 285 }
286
287 if (m_bufferPos + escapeSeq.Length > BUFFER_SIZE)
288 FlushBuffer();
289
290 Array.Copy(escapeSeq, 0, m_buffer, m_bufferPos, escapeSeq.Length);
291 m_bufferPos += escapeSeq.Length;
292
259 293 }
260 294
261 m_writer.Write('"');
295 if (m_bufferPos >= BUFFER_SIZE)
296 FlushBuffer();
297
298 m_buffer[m_bufferPos++] = '"';
299
300 FlushBuffer();
262 301 }
263 302
264 303 void Write(double value) {
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@@ -5,6 +5,8 using Implab;
5 5 using System.Collections.Generic;
6 6 using System.Collections.Concurrent;
7 7 using System.Threading;
8 using Implab.JSON;
9 using System.IO;
8 10
9 11 namespace MonoPlay {
10 12 class MainClass {
@@ -16,25 +18,27 namespace MonoPlay {
16 18
17 19 var t1 = Environment.TickCount;
18 20
19 for (int i = 0; i < 10000000; i++) {
20
21 var p = new Promise<int>();
22 p.On(HandleResult);
23 p.Resolve(i);
21 for(int i =0; i < 1000000; i++)
22 using (var tw = new StringWriter()) {
23 var jw = new JSONWriter(tw);
24
25 jw.WriteValue("\r\nhere\tvalue\u0002\u0003");
26
27 //Console.WriteLine(tw);
24 28 }
25 29
30
31
26 32 var t2 = Environment.TickCount;
27 33 Console.WriteLine("done: {0} ms, {1:.00} Mb, {2} GC", t2 - t1, GC.GetTotalMemory(false) / (1024*1024), GC.CollectionCount(0) );
28 34
29 35 }
30 36
31 static void HandleAction ()
32 {
33
37 static void DoTest() {
38
39
40
34 41 }
35 42
36 static void HandleResult(int x) {
37
38 }
39 43 }
40 44 }
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