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
|
/*
* 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"
#include <stdlib.h>
static inline bool is_between(int c, int min, int max)
{
return (unsigned)(c - min) <= (unsigned)(max - min);
}
static inline bool is_ws(int c)
{
return is_between(c, 1, 32);
}
static inline bool is_digit(int c)
{
return is_between(c, '0', '9');
}
static inline bool is_sep(int c)
{
return is_ws(c) || c == ',' || c == ';';
}
static int to_hex(int c)
{
if (is_digit(c))
return c - '0';
c |= 0x20; // make us lower-case
if (is_between(c, 'a', 'f'))
return c + 10 - 'a';
else
return -1;
}
static inline bool is_hex(int c)
{
return to_hex(c) >= 0;
}
static const char* skip_ws(const char str[])
{
SkASSERT(str);
while (is_ws(*str))
str++;
return str;
}
static const char* skip_sep(const char str[])
{
SkASSERT(str);
while (is_sep(*str))
str++;
return str;
}
int SkParse::Count(const char str[])
{
char c;
int count = 0;
goto skipLeading;
do {
count++;
do {
if ((c = *str++) == '\0')
goto goHome;
} while (is_sep(c) == false);
skipLeading:
do {
if ((c = *str++) == '\0')
goto goHome;
} while (is_sep(c));
} while (true);
goHome:
return count;
}
int SkParse::Count(const char str[], char separator)
{
char c;
int count = 0;
goto skipLeading;
do {
count++;
do {
if ((c = *str++) == '\0')
goto goHome;
} while (c != separator);
skipLeading:
do {
if ((c = *str++) == '\0')
goto goHome;
} while (c == separator);
} while (true);
goHome:
return count;
}
const char* SkParse::FindHex(const char str[], uint32_t* value)
{
SkASSERT(str);
str = skip_ws(str);
if (!is_hex(*str))
return nullptr;
uint32_t n = 0;
int max_digits = 8;
int digit;
while ((digit = to_hex(*str)) >= 0)
{
if (--max_digits < 0)
return nullptr;
n = (n << 4) | digit;
str += 1;
}
if (*str == 0 || is_ws(*str))
{
if (value)
*value = n;
return str;
}
return nullptr;
}
const char* SkParse::FindS32(const char str[], int32_t* value)
{
SkASSERT(str);
str = skip_ws(str);
int sign = 0;
if (*str == '-')
{
sign = -1;
str += 1;
}
if (!is_digit(*str))
return nullptr;
int n = 0;
while (is_digit(*str))
{
n = 10*n + *str - '0';
str += 1;
}
if (value)
*value = (n ^ sign) - sign;
return str;
}
const char* SkParse::FindMSec(const char str[], SkMSec* value)
{
SkASSERT(str);
str = skip_ws(str);
int sign = 0;
if (*str == '-')
{
sign = -1;
str += 1;
}
if (!is_digit(*str))
return nullptr;
int n = 0;
while (is_digit(*str))
{
n = 10*n + *str - '0';
str += 1;
}
int remaining10s = 3;
if (*str == '.') {
str++;
while (is_digit(*str))
{
n = 10*n + *str - '0';
str += 1;
if (--remaining10s == 0)
break;
}
}
while (--remaining10s >= 0)
n *= 10;
if (value)
*value = (n ^ sign) - sign;
return str;
}
const char* SkParse::FindScalar(const char str[], SkScalar* value) {
SkASSERT(str);
str = skip_ws(str);
char* stop;
float v = (float)strtod(str, &stop);
if (str == stop) {
return nullptr;
}
if (value) {
*value = v;
}
return stop;
}
const char* SkParse::FindScalars(const char str[], SkScalar value[], int count)
{
SkASSERT(count >= 0);
if (count > 0)
{
for (;;)
{
str = SkParse::FindScalar(str, value);
if (--count == 0 || str == nullptr)
break;
// keep going
str = skip_sep(str);
if (value)
value += 1;
}
}
return str;
}
static bool lookup_str(const char str[], const char** table, int count)
{
while (--count >= 0)
if (!strcmp(str, table[count]))
return true;
return false;
}
bool SkParse::FindBool(const char str[], bool* value)
{
static const char* gYes[] = { "yes", "1", "true" };
static const char* gNo[] = { "no", "0", "false" };
if (lookup_str(str, gYes, SK_ARRAY_COUNT(gYes)))
{
if (value) *value = true;
return true;
}
else if (lookup_str(str, gNo, SK_ARRAY_COUNT(gNo)))
{
if (value) *value = false;
return true;
}
return false;
}
int SkParse::FindList(const char target[], const char list[])
{
size_t len = strlen(target);
int index = 0;
for (;;)
{
const char* end = strchr(list, ',');
size_t entryLen;
if (end == nullptr) // last entry
entryLen = strlen(list);
else
entryLen = end - list;
if (entryLen == len && memcmp(target, list, len) == 0)
return index;
if (end == nullptr)
break;
list = end + 1; // skip the ','
index += 1;
}
return -1;
}
#ifdef SK_SUPPORT_UNITTEST
void SkParse::UnitTest()
{
// !!! additional parse tests go here
SkParse::TestColor();
}
#endif
|
