2 * Copyright 2006 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkUtils_DEFINED
9 #define SkUtils_DEFINED
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.
20 void sk_memset16(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.
29 void sk_memset32(uint32_t dst[], uint32_t value, int count);
30 typedef void (*SkMemset32Proc)(uint32_t dst[], uint32_t value, int count);
31 SkMemset32Proc SkMemset32GetPlatformProc();
33 ///////////////////////////////////////////////////////////////////////////////
35 #define kMaxBytesInUTF8Sequence 4
38 int SkUTF8_LeadByteToCount(unsigned c);
40 #define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1)
43 inline int SkUTF8_CountUTF8Bytes(const char utf8[]) {
45 return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8);
48 int SkUTF8_CountUnichars(const char utf8[]);
49 int SkUTF8_CountUnichars(const char utf8[], size_t byteLength);
50 SkUnichar SkUTF8_ToUnichar(const char utf8[]);
51 SkUnichar SkUTF8_NextUnichar(const char**);
52 SkUnichar SkUTF8_PrevUnichar(const char**);
54 /** Return the number of bytes need to convert a unichar
55 into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence,
56 or 0 if uni is illegal.
58 size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL);
60 ///////////////////////////////////////////////////////////////////////////////
62 #define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800)
63 #define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00)
65 int SkUTF16_CountUnichars(const uint16_t utf16[]);
66 int SkUTF16_CountUnichars(const uint16_t utf16[], int numberOf16BitValues);
67 // returns the current unichar and then moves past it (*p++)
68 SkUnichar SkUTF16_NextUnichar(const uint16_t**);
69 // this guy backs up to the previus unichar value, and returns it (*--p)
70 SkUnichar SkUTF16_PrevUnichar(const uint16_t**);
71 size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL);
73 size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues,
76 inline bool SkUnichar_IsVariationSelector(SkUnichar uni) {
77 /* The 'true' ranges are:
78 * 0x180B <= uni <= 0x180D
79 * 0xFE00 <= uni <= 0xFE0F
80 * 0xE0100 <= uni <= 0xE01EF
82 if (uni < 0x180B || uni > 0xE01EF) {
85 if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) {
91 ///////////////////////////////////////////////////////////////////////////////
95 /** NOTE: label contents are not copied, just the ptr is
96 retained, so DON'T DELETE IT.
98 SkAutoTrace(const char label[]) : fLabel(label) {
99 SkDebugf("--- trace: %s Enter\n", fLabel);
102 SkDebugf("--- trace: %s Leave\n", fLabel);
107 #define SkAutoTrace(...) SK_REQUIRE_LOCAL_VAR(SkAutoTrace)