gfx/skia/trunk/include/core/SkUtils.h@129ffea94266
gfx/skia/trunk/include/core/SkUtils.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
8 #ifndef SkUtils_DEFINED
9 #define SkUtils_DEFINED
11 #include "SkTypes.h"
13 ///////////////////////////////////////////////////////////////////////////////
15 /** Similar to memset(), but it assigns a 16bit value into the buffer.
16 @param buffer The memory to have value copied into it
17 @param value The 16bit value to be copied into buffer
18 @param count The number of times value should be copied into the buffer.
19 */
20 void sk_memset16_portable(uint16_t dst[], uint16_t value, int count);
21 typedef void (*SkMemset16Proc)(uint16_t dst[], uint16_t value, int count);
22 SkMemset16Proc SkMemset16GetPlatformProc();
24 /** Similar to memset(), but it assigns a 32bit value into the buffer.
25 @param buffer The memory to have value copied into it
26 @param value The 32bit value to be copied into buffer
27 @param count The number of times value should be copied into the buffer.
28 */
29 void sk_memset32_portable(uint32_t dst[], uint32_t value, int count);
30 typedef void (*SkMemset32Proc)(uint32_t dst[], uint32_t value, int count);
31 SkMemset32Proc SkMemset32GetPlatformProc();
33 #ifndef sk_memset16
34 extern SkMemset16Proc sk_memset16;
35 #endif
37 #ifndef sk_memset32
38 extern SkMemset32Proc sk_memset32;
39 #endif
41 ///////////////////////////////////////////////////////////////////////////////
43 #define kMaxBytesInUTF8Sequence 4
45 #ifdef SK_DEBUG
46 int SkUTF8_LeadByteToCount(unsigned c);
47 #else
48 #define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1)
49 #endif
51 inline int SkUTF8_CountUTF8Bytes(const char utf8[]) {
52 SkASSERT(utf8);
53 return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8);
54 }
56 int SkUTF8_CountUnichars(const char utf8[]);
57 int SkUTF8_CountUnichars(const char utf8[], size_t byteLength);
58 SkUnichar SkUTF8_ToUnichar(const char utf8[]);
59 SkUnichar SkUTF8_NextUnichar(const char**);
60 SkUnichar SkUTF8_PrevUnichar(const char**);
62 /** Return the number of bytes need to convert a unichar
63 into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence,
64 or 0 if uni is illegal.
65 */
66 size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL);
68 ///////////////////////////////////////////////////////////////////////////////
70 #define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800)
71 #define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00)
73 int SkUTF16_CountUnichars(const uint16_t utf16[]);
74 int SkUTF16_CountUnichars(const uint16_t utf16[], int numberOf16BitValues);
75 // returns the current unichar and then moves past it (*p++)
76 SkUnichar SkUTF16_NextUnichar(const uint16_t**);
77 // this guy backs up to the previus unichar value, and returns it (*--p)
78 SkUnichar SkUTF16_PrevUnichar(const uint16_t**);
79 size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL);
81 size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues,
82 char utf8[] = NULL);
84 inline bool SkUnichar_IsVariationSelector(SkUnichar uni) {
85 /* The 'true' ranges are:
86 * 0x180B <= uni <= 0x180D
87 * 0xFE00 <= uni <= 0xFE0F
88 * 0xE0100 <= uni <= 0xE01EF
89 */
90 if (uni < 0x180B || uni > 0xE01EF) {
91 return false;
92 }
93 if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) {
94 return false;
95 }
96 return true;
97 }
99 ///////////////////////////////////////////////////////////////////////////////
101 class SkAutoTrace {
102 public:
103 /** NOTE: label contents are not copied, just the ptr is
104 retained, so DON'T DELETE IT.
105 */
106 SkAutoTrace(const char label[]) : fLabel(label) {
107 SkDebugf("--- trace: %s Enter\n", fLabel);
108 }
109 ~SkAutoTrace() {
110 SkDebugf("--- trace: %s Leave\n", fLabel);
111 }
112 private:
113 const char* fLabel;
114 };
115 #define SkAutoTrace(...) SK_REQUIRE_LOCAL_VAR(SkAutoTrace)
117 #endif
