aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/utils/SkParseColor.cpp
blob: db47aae82ca66a7050bf28eb2c4a79955daf37f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */


#include "SkParse.h"

#ifdef SK_DEBUG
#include "SkString.h"

    // compress names 6 chars per long (packed 5 bits/char )
        // note: little advantage to splitting chars across longs, since 3 longs at 2 unused bits each
        // allow for one additional split char (vs. the 18 unsplit chars in the three longs)
    // use extra two bits to represent:
        // 00 : final 6 (or fewer) chars (if 'a' is 0x01, zero could have special meaning)
        // 01 : not final 6 chars
        // 10 : color
        // 11 : unused, except as debugging sentinal? (could be -1 for easier test)
    // !!! the bit to end the word (last) is at the low bit for binary search
    // lookup first character in offset for quick start
        // offset is 27-entry table of bytes(?) that trims linear search to at most 21 entries ('d')
    // shift match into long; set bit 30 if it all doesn't fit
    // while longs don't match, march forward
        // if they do match, and bit 30 is set, advance match, clearing bit 30 if
        // final chars, and advance to next test
        // if they do match, and bit 30 is clear, get next long (color) and return it
    // stop at lookup of first char + 1
static const struct SkNameRGB {
    const char* name;
    int rgb;
} colorNames[] = {
    { "aliceblue",            0xF0F8FF },
    { "antiquewhite",         0xFAEBD7 },
    { "aqua",                 0x00FFFF },
    { "aquamarine",           0x7FFFD4 },
    { "azure",                0xF0FFFF },
    { "beige",                0xF5F5DC },
    { "bisque",               0xFFE4C4 },
    { "black",                0x000000 },
    { "blanchedalmond",       0xFFEBCD },
    { "blue",                 0x0000FF },
    { "blueviolet",           0x8A2BE2 },
    { "brown",                0xA52A2A },
    { "burlywood",            0xDEB887 },
    { "cadetblue",            0x5F9EA0 },
    { "chartreuse",           0x7FFF00 },
    { "chocolate",            0xD2691E },
    { "coral",                0xFF7F50 },
    { "cornflowerblue",       0x6495ED },
    { "cornsilk",             0xFFF8DC },
    { "crimson",              0xDC143C },
    { "cyan",                 0x00FFFF },
    { "darkblue",             0x00008B },
    { "darkcyan",             0x008B8B },
    { "darkgoldenrod",        0xB8860B },
    { "darkgray",             0xA9A9A9 },
    { "darkgreen",            0x006400 },
    { "darkkhaki",            0xBDB76B },
    { "darkmagenta",          0x8B008B },
    { "darkolivegreen",       0x556B2F },
    { "darkorange",           0xFF8C00 },
    { "darkorchid",           0x9932CC },
    { "darkred",              0x8B0000 },
    { "darksalmon",           0xE9967A },
    { "darkseagreen",         0x8FBC8F },
    { "darkslateblue",        0x483D8B },
    { "darkslategray",        0x2F4F4F },
    { "darkturquoise",        0x00CED1 },
    { "darkviolet",           0x9400D3 },
    { "deeppink",             0xFF1493 },
    { "deepskyblue",          0x00BFFF },
    { "dimgray",              0x696969 },
    { "dodgerblue",           0x1E90FF },
    { "firebrick",            0xB22222 },
    { "floralwhite",          0xFFFAF0 },
    { "forestgreen",          0x228B22 },
    { "fuchsia",              0xFF00FF },
    { "gainsboro",            0xDCDCDC },
    { "ghostwhite",           0xF8F8FF },
    { "gold",                 0xFFD700 },
    { "goldenrod",            0xDAA520 },
    { "gray",                 0x808080 },
    { "green",                0x008000 },
    { "greenyellow",          0xADFF2F },
    { "honeydew",             0xF0FFF0 },
    { "hotpink",              0xFF69B4 },
    { "indianred",            0xCD5C5C },
    { "indigo",               0x4B0082 },
    { "ivory",                0xFFFFF0 },
    { "khaki",                0xF0E68C },
    { "lavender",             0xE6E6FA },
    { "lavenderblush",        0xFFF0F5 },
    { "lawngreen",            0x7CFC00 },
    { "lemonchiffon",         0xFFFACD },
    { "lightblue",            0xADD8E6 },
    { "lightcoral",           0xF08080 },
    { "lightcyan",            0xE0FFFF },
    { "lightgoldenrodyellow", 0xFAFAD2 },
    { "lightgreen",           0x90EE90 },
    { "lightgrey",            0xD3D3D3 },
    { "lightpink",            0xFFB6C1 },
    { "lightsalmon",          0xFFA07A },
    { "lightseagreen",        0x20B2AA },
    { "lightskyblue",         0x87CEFA },
    { "lightslategray",       0x778899 },
    { "lightsteelblue",       0xB0C4DE },
    { "lightyellow",          0xFFFFE0 },
    { "lime",                 0x00FF00 },
    { "limegreen",            0x32CD32 },
    { "linen",                0xFAF0E6 },
    { "magenta",              0xFF00FF },
    { "maroon",               0x800000 },
    { "mediumaquamarine",     0x66CDAA },
    { "mediumblue",           0x0000CD },
    { "mediumorchid",         0xBA55D3 },
    { "mediumpurple",         0x9370DB },
    { "mediumseagreen",       0x3CB371 },
    { "mediumslateblue",      0x7B68EE },
    { "mediumspringgreen",    0x00FA9A },
    { "mediumturquoise",      0x48D1CC },
    { "mediumvioletred",      0xC71585 },
    { "midnightblue",         0x191970 },
    { "mintcream",            0xF5FFFA },
    { "mistyrose",            0xFFE4E1 },
    { "moccasin",             0xFFE4B5 },
    { "navajowhite",          0xFFDEAD },
    { "navy",                 0x000080 },
    { "oldlace",              0xFDF5E6 },
    { "olive",                0x808000 },
    { "olivedrab",            0x6B8E23 },
    { "orange",               0xFFA500 },
    { "orangered",            0xFF4500 },
    { "orchid",               0xDA70D6 },
    { "palegoldenrod",        0xEEE8AA },
    { "palegreen",            0x98FB98 },
    { "paleturquoise",        0xAFEEEE },
    { "palevioletred",        0xDB7093 },
    { "papayawhip",           0xFFEFD5 },
    { "peachpuff",            0xFFDAB9 },
    { "peru",                 0xCD853F },
    { "pink",                 0xFFC0CB },
    { "plum",                 0xDDA0DD },
    { "powderblue",           0xB0E0E6 },
    { "purple",               0x800080 },
    { "red",                  0xFF0000 },
    { "rosybrown",            0xBC8F8F },
    { "royalblue",            0x4169E1 },
    { "saddlebrown",          0x8B4513 },
    { "salmon",               0xFA8072 },
    { "sandybrown",           0xF4A460 },
    { "seagreen",             0x2E8B57 },
    { "seashell",             0xFFF5EE },
    { "sienna",               0xA0522D },
    { "silver",               0xC0C0C0 },
    { "skyblue",              0x87CEEB },
    { "slateblue",            0x6A5ACD },
    { "slategray",            0x708090 },
    { "snow",                 0xFFFAFA },
    { "springgreen",          0x00FF7F },
    { "steelblue",            0x4682B4 },
    { "tan",                  0xD2B48C },
    { "teal",                 0x008080 },
    { "thistle",              0xD8BFD8 },
    { "tomato",               0xFF6347 },
    { "turquoise",            0x40E0D0 },
    { "violet",               0xEE82EE },
    { "wheat",                0xF5DEB3 },
    { "white",                0xFFFFFF },
    { "whitesmoke",           0xF5F5F5 },
    { "yellow",               0xFFFF00 },
    { "yellowgreen",          0x9ACD32 }
};

int colorNamesSize = sizeof(colorNames) / sizeof(colorNames[0]);

#ifdef SK_SUPPORT_UNITTEST
static void CreateTable() {
    SkString comment;
    size_t originalSize = 0;
    int replacement = 0;
    for (int index = 0; index < colorNamesSize; index++) {
        SkNameRGB nameRGB =  colorNames[index];
        const char* name = nameRGB.name;
        size_t len = strlen(name);
        originalSize += len + 9;
        bool first = true;
        bool last = false;
        do {
            int compressed = 0;
            const char* start = name;
            for (int chIndex = 0; chIndex < 6; chIndex++) {
                compressed <<= 5;
                compressed |= *name ? *name++ - 'a' + 1 : 0 ;
            }
            replacement += sizeof(int);
            compressed <<= 1;
            compressed |= 1;
            if (first) {
                compressed |= 0x80000000;
                first = false;
            }
            if (len <= 6) { // last
                compressed &= ~1;
                last = true;
            }
            len -= 6;
            SkDebugf("0x%08x, ", compressed);
            comment.append(start, name - start);
        } while (last == false);
        replacement += sizeof(int);
        SkDebugf("0x%08x, ", nameRGB.rgb);
        SkDebugf("// %s\n", comment.c_str());
        comment.reset();
    }
    SkDebugf("// original = %d : replacement = %d\n", originalSize, replacement);
    SkASSERT(0); // always stop after creating table
}
#endif

#endif

static const unsigned int gColorNames[] = {
0x85891945, 0x32a50000, 0x00f0f8ff, // aliceblue
0x85d44c6b, 0x16e84d0a, 0x00faebd7, // antiquewhite
0x86350800, 0x0000ffff, // aqua
0x86350b43, 0x492e2800, 0x007fffd4, // aquamarine
0x87559140, 0x00f0ffff, // azure
0x88a93940, 0x00f5f5dc, // beige
0x89338d4a, 0x00ffe4c4, // bisque
0x89811ac0, 0x00000000, // black
0x898170d1, 0x1481635f, 0x38800000, 0x00ffebcd, // blanchedalmond
0x89952800, 0x000000ff, // blue
0x89952d93, 0x3d85a000, 0x008a2be2, // blueviolet
0x8a4fbb80, 0x00a52a2a, // brown
0x8ab2666f, 0x3de40000, 0x00deb887, // burlywood
0x8c242d05, 0x32a50000, 0x005f9ea0, // cadetblue
0x8d019525, 0x16b32800, 0x007fff00, // chartreuse
0x8d0f1bd9, 0x06850000, 0x00d2691e, // chocolate
0x8df20b00, 0x00ff7f50, // coral
0x8df27199, 0x3ee59099, 0x54a00000, 0x006495ed, // cornflowerblue
0x8df274d3, 0x31600000, 0x00fff8dc, // cornsilk
0x8e496cdf, 0x38000000, 0x00dc143c, // crimson
0x8f217000, 0x0000ffff, // cyan
0x90325899, 0x54a00000, 0x0000008b, // darkblue
0x903258f3, 0x05c00000, 0x00008b8b, // darkcyan
0x903259df, 0x3085749f, 0x10000000, 0x00b8860b, // darkgoldenrod
0x903259e5, 0x07200000, 0x00a9a9a9, // darkgray
0x903259e5, 0x14ae0000, 0x00006400, // darkgreen
0x90325ad1, 0x05690000, 0x00bdb76b, // darkkhaki
0x90325b43, 0x1caea040, 0x008b008b, // darkmagenta
0x90325bd9, 0x26c53c8b, 0x15c00000, 0x00556b2f, // darkolivegreen
0x90325be5, 0x05c72800, 0x00ff8c00, // darkorange
0x90325be5, 0x0d092000, 0x009932cc, // darkorchid
0x90325c8b, 0x10000000, 0x008b0000, // darkred
0x90325cc3, 0x31af7000, 0x00e9967a, // darksalmon
0x90325ccb, 0x04f2295c, 0x008fbc8f, // darkseagreen
0x90325cd9, 0x0685132b, 0x14000000, 0x00483d8b, // darkslateblue
0x90325cd9, 0x06853c83, 0x64000000, 0x002f4f4f, // darkslategray
0x90325d2b, 0x4a357a67, 0x14000000, 0x0000ced1, // darkturquoise
0x90325d93, 0x3d85a000, 0x009400d3, // darkviolet
0x90a58413, 0x39600000, 0x00ff1493, // deeppink
0x90a584d7, 0x644ca940, 0x0000bfff, // deepskyblue
0x912d3c83, 0x64000000, 0x00696969, // dimgray
0x91e43965, 0x09952800, 0x001e90ff, // dodgerblue
0x993228a5, 0x246b0000, 0x00b22222, // firebrick
0x998f9059, 0x5d09a140, 0x00fffaf0, // floralwhite
0x99f22ce9, 0x1e452b80, 0x00228b22, // forestgreen
0x9aa344d3, 0x04000000, 0x00ff00ff, // fuchsia
0x9c2974c5, 0x3e4f0000, 0x00dcdcdc, // gainsboro
0x9d0f9d2f, 0x21342800, 0x00f8f8ff, // ghostwhite
0x9dec2000, 0x00ffd700, // gold
0x9dec215d, 0x49e40000, 0x00daa520, // goldenrod
0x9e41c800, 0x00808080, // gray
0x9e452b80, 0x00008000, // green
0x9e452bb3, 0x158c7dc0, 0x00adff2f, // greenyellow
0xa1ee2e49, 0x16e00000, 0x00f0fff0, // honeydew
0xa1f4825d, 0x2c000000, 0x00ff69b4, // hotpink
0xa5c4485d, 0x48a40000, 0x00cd5c5c, // indianred
0xa5c449de, 0x004b0082, // indigo
0xa6cf9640, 0x00fffff0, // ivory
0xad015a40, 0x00f0e68c, // khaki
0xb0362b89, 0x16400000, 0x00e6e6fa, // lavender
0xb0362b89, 0x16426567, 0x20000000, 0x00fff0f5, // lavenderblush
0xb03771e5, 0x14ae0000, 0x007cfc00, // lawngreen
0xb0ad7b87, 0x212633dc, 0x00fffacd, // lemonchiffon
0xb1274505, 0x32a50000, 0x00add8e6, // lightblue
0xb1274507, 0x3e416000, 0x00f08080, // lightcoral
0xb1274507, 0x642e0000, 0x00e0ffff, // lightcyan
0xb127450f, 0x3d842ba5, 0x3c992b19, 0x3ee00000, 0x00fafad2, // lightgoldenrodyellow
0xb127450f, 0x48a57000, 0x0090ee90, // lightgreen
0xb127450f, 0x48b90000, 0x00d3d3d3, // lightgrey
0xb1274521, 0x25cb0000, 0x00ffb6c1, // lightpink
0xb1274527, 0x058d7b80, 0x00ffa07a, // lightsalmon
0xb1274527, 0x1427914b, 0x38000000, 0x0020b2aa, // lightseagreen
0xb1274527, 0x2f22654a, 0x0087cefa, // lightskyblue
0xb1274527, 0x303429e5, 0x07200000, 0x00778899, // lightslategray
0xb1274527, 0x50a56099, 0x54a00000, 0x00b0c4de, // lightsteelblue
0xb1274533, 0x158c7dc0, 0x00ffffe0, // lightyellow
0xb12d2800, 0x0000ff00, // lime
0xb12d29e5, 0x14ae0000, 0x0032cd32, // limegreen
0xb12e2b80, 0x00faf0e6, // linen
0xb4272ba9, 0x04000000, 0x00ff00ff, // magenta
0xb4327bdc, 0x00800000, // maroon
0xb4a44d5b, 0x06350b43, 0x492e2800, 0x0066cdaa, // mediumaquamarine
0xb4a44d5b, 0x09952800, 0x000000cd, // mediumblue
0xb4a44d5b, 0x3e434248, 0x00ba55d3, // mediumorchid
0xb4a44d5b, 0x42b2830a, 0x009370db, // mediumpurple
0xb4a44d5b, 0x4ca13c8b, 0x15c00000, 0x003cb371, // mediumseagreen
0xb4a44d5b, 0x4d81a145, 0x32a50000, 0x007b68ee, // mediumslateblue
0xb4a44d5b, 0x4e124b8f, 0x1e452b80, 0x0000fa9a, // mediumspringgreen
0xb4a44d5b, 0x52b28d5f, 0x26650000, 0x0048d1cc, // mediumturquoise
0xb4a44d5b, 0x592f6169, 0x48a40000, 0x00c71585, // mediumvioletred
0xb524724f, 0x2282654a, 0x00191970, // midnightblue
0xb52ea0e5, 0x142d0000, 0x00f5fffa, // mintcream
0xb533a665, 0x3e650000, 0x00ffe4e1, // mistyrose
0xb5e31867, 0x25c00000, 0x00ffe4b5, // moccasin
0xb8360a9f, 0x5d09a140, 0x00ffdead, // navajowhite
0xb836c800, 0x00000080, // navy
0xbd846047, 0x14000000, 0x00fdf5e6, // oldlace
0xbd89b140, 0x00808000, // olive
0xbd89b149, 0x48220000, 0x006b8e23, // olivedrab
0xbe4171ca, 0x00ffa500, // orange
0xbe4171cb, 0x48a40000, 0x00ff4500, // orangered
0xbe434248, 0x00da70d6, // orchid
0xc02c29df, 0x3085749f, 0x10000000, 0x00eee8aa, // palegoldenrod
0xc02c29e5, 0x14ae0000, 0x0098fb98, // palegreen
0xc02c2d2b, 0x4a357a67, 0x14000000, 0x00afeeee, // paleturquoise
0xc02c2d93, 0x3d85a48b, 0x10000000, 0x00db7093, // palevioletred
0xc0300e43, 0x5d098000, 0x00ffefd5, // papayawhip
0xc0a11a21, 0x54c60000, 0x00ffdab9, // peachpuff
0xc0b2a800, 0x00cd853f, // peru
0xc12e5800, 0x00ffc0cb, // pink
0xc1956800, 0x00dda0dd, // plum
0xc1f72165, 0x09952800, 0x00b0e0e6, // powderblue
0xc2b2830a, 0x00800080, // purple
0xc8a40000, 0x00ff0000, // red
0xc9f3c8a5, 0x3eee0000, 0x00bc8f8f, // rosybrown
0xc9f90b05, 0x32a50000, 0x004169e1, // royalblue
0xcc24230b, 0x0a4fbb80, 0x008b4513, // saddlebrown
0xcc2c6bdc, 0x00fa8072, // salmon
0xcc2e2645, 0x49f77000, 0x00f4a460, // sandybrown
0xcca13c8b, 0x15c00000, 0x002e8b57, // seagreen
0xcca19a0b, 0x31800000, 0x00fff5ee, // seashell
0xcd257382, 0x00a0522d, // sienna
0xcd2cb164, 0x00c0c0c0, // silver
0xcd79132b, 0x14000000, 0x0087ceeb, // skyblue
0xcd81a145, 0x32a50000, 0x006a5acd, // slateblue
0xcd81a14f, 0x48390000, 0x00708090, // slategray
0xcdcfb800, 0x00fffafa, // snow
0xce124b8f, 0x1e452b80, 0x0000ff7f, // springgreen
0xce852b05, 0x32a50000, 0x004682b4, // steelblue
0xd02e0000, 0x00d2b48c, // tan
0xd0a16000, 0x00008080, // teal
0xd1099d19, 0x14000000, 0x00d8bfd8, // thistle
0xd1ed0d1e, 0x00ff6347, // tomato
0xd2b28d5f, 0x26650000, 0x0040e0d0, // turquoise
0xd92f6168, 0x00ee82ee, // violet
0xdd050d00, 0x00f5deb3, // wheat
0xdd09a140, 0x00ffffff, // white
0xdd09a167, 0x35eb2800, 0x00f5f5f5, // whitesmoke
0xe4ac63ee, 0x00ffff00, // yellow
0xe4ac63ef, 0x1e452b80, 0x009acd32 // yellowgreen
}; // original = 2505 : replacement = 1616


const char* SkParse::FindNamedColor(const char* name, size_t len, SkColor* color) {
    const char* namePtr = name;
    unsigned int sixMatches[4];
    unsigned int* sixMatchPtr = sixMatches;
    bool first = true;
    bool last = false;
    char ch;
    do {
        unsigned int sixMatch = 0;
        for (int chIndex = 0; chIndex < 6; chIndex++) {
            sixMatch <<= 5;
            ch = *namePtr  | 0x20;
            if (ch < 'a' || ch > 'z')
                ch = 0;
            else {
                ch = ch - 'a' + 1;
                namePtr++;
            }
            sixMatch |= ch ;  // turn 'A' (0x41) into 'a' (0x61);
        }
        sixMatch <<= 1;
        sixMatch |= 1;
        if (first) {
            sixMatch |= 0x80000000;
            first = false;
        }
        ch = *namePtr | 0x20;
        last = ch < 'a' || ch > 'z';
        if (last)
            sixMatch &= ~1;
        len -= 6;
        *sixMatchPtr++ = sixMatch;
    } while (last == false && len > 0);
    const int colorNameSize = sizeof(gColorNames) / sizeof(unsigned int);
    int lo = 0;
    int hi = colorNameSize - 3; // back off to beginning of yellowgreen
    while (lo <= hi) {
        int mid = (hi + lo) >> 1;
        while ((int) gColorNames[mid] >= 0)
            --mid;
        sixMatchPtr = sixMatches;
        while (gColorNames[mid] == *sixMatchPtr) {
            ++mid;
            if ((*sixMatchPtr & 1) == 0) { // last
                *color = gColorNames[mid] | 0xFF000000;
                return namePtr;
            }
            ++sixMatchPtr;
        }
        int sixMask = *sixMatchPtr & ~0x80000000;
        int midMask = gColorNames[mid] & ~0x80000000;
        if (sixMask > midMask) {
            lo = mid + 2;   // skip color
            while ((int) gColorNames[lo] >= 0)
                ++lo;
        } else if (hi == mid)
            return NULL;
        else
            hi = mid;
    }
    return NULL;
}

// !!! move to char utilities
//static int count_separators(const char* str, const char* sep) {
//  char c;
//  int separators = 0;
//  while ((c = *str++) != '\0') {
//      if (strchr(sep, c) == NULL)
//          continue;
//      do {
//          if ((c = *str++) == '\0')
//              goto goHome;
//      } while (strchr(sep, c) != NULL);
//      separators++;
//  }
//goHome:
//  return separators;
//}

static inline unsigned nib2byte(unsigned n)
{
    SkASSERT((n & ~0xF) == 0);
    return (n << 4) | n;
}

const char* SkParse::FindColor(const char* value, SkColor* colorPtr) {
    unsigned int oldAlpha = SkColorGetA(*colorPtr);
    if (value[0] == '#') {
        uint32_t    hex;
        const char* end = SkParse::FindHex(value + 1, &hex);
//      SkASSERT(end);
        if (end == NULL)
            return end;
        size_t len = end - value - 1;
        if (len == 3 || len == 4) {
            unsigned a = len == 4 ? nib2byte(hex >> 12) : oldAlpha;
            unsigned r = nib2byte((hex >> 8) & 0xF);
            unsigned g = nib2byte((hex >> 4) & 0xF);
            unsigned b = nib2byte(hex & 0xF);
            *colorPtr = SkColorSetARGB(a, r, g, b);
            return end;
        } else if (len == 6 || len == 8) {
            if (len == 6)
                hex |= oldAlpha << 24;
            *colorPtr = hex;
            return end;
        } else {
//          SkASSERT(0);
            return NULL;
        }
//  } else if (strchr(value, ',')) {
//      SkScalar array[4];
//      int count = count_separators(value, ",") + 1; // !!! count commas, add 1
//      SkASSERT(count == 3 || count == 4);
//      array[0] = SK_Scalar1 * 255;
//      const char* end = SkParse::FindScalars(value, &array[4 - count], count);
//      if (end == NULL)
//          return NULL;
        // !!! range check for errors?
//      *colorPtr = SkColorSetARGB(SkScalarRound(array[0]), SkScalarRound(array[1]),
//          SkScalarRound(array[2]), SkScalarRound(array[3]));
//      return end;
    } else
        return FindNamedColor(value, strlen(value), colorPtr);
}

#ifdef SK_SUPPORT_UNITTEST
void SkParse::TestColor() {
    if (false)
        CreateTable();  // regenerates data table in the output window
    SkColor result;
    int index;
    for (index = 0; index < colorNamesSize; index++) {
        result = SK_ColorBLACK;
        SkNameRGB nameRGB = colorNames[index];
        SkASSERT(FindColor(nameRGB.name, &result) != NULL);
        SkASSERT(result == (SkColor) (nameRGB.rgb | 0xFF000000));
    }
    for (index = 0; index < colorNamesSize; index++) {
        result = SK_ColorBLACK;
        SkNameRGB nameRGB = colorNames[index];
        char bad[24];
        size_t len = strlen(nameRGB.name);
        memcpy(bad, nameRGB.name, len);
        bad[len - 1] -= 1;
        SkASSERT(FindColor(bad, &result) == false);
        bad[len - 1] += 2;
        SkASSERT(FindColor(bad, &result) == false);
    }
    result = SK_ColorBLACK;
    SkASSERT(FindColor("lightGrey", &result));
    SkASSERT(result == 0xffd3d3d3);
//  SkASSERT(FindColor("12,34,56,78", &result));
//  SkASSERT(result == ((12 << 24) | (34 << 16) | (56 << 8) | (78 << 0)));
    result = SK_ColorBLACK;
    SkASSERT(FindColor("#ABCdef", &result));
    SkASSERT(result == 0XFFABCdef);
    SkASSERT(FindColor("#12ABCdef", &result));
    SkASSERT(result == 0X12ABCdef);
    result = SK_ColorBLACK;
    SkASSERT(FindColor("#123", &result));
    SkASSERT(result == 0Xff112233);
    SkASSERT(FindColor("#abcd", &result));
    SkASSERT(result == 0Xaabbccdd);
    result = SK_ColorBLACK;
//  SkASSERT(FindColor("71,162,253", &result));
//  SkASSERT(result == ((0xFF << 24) | (71 << 16) | (162 << 8) | (253 << 0)));
}
#endif