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 */
7
8 #ifndef SkUtils_DEFINED
9 #define SkUtils_DEFINED
10
11 #include "SkOpts.h"
12 #include "SkTypeface.h"
13 #include "../utils/SkUTF.h"
14
15 /** Similar to memset(), but it assigns a 16, 32, or 64-bit value into the buffer.
16 @param buffer The memory to have value copied into it
17 @param value The value to be copied into buffer
18 @param count The number of times value should be copied into the buffer.
19 */
sk_memset16(uint16_t buffer[],uint16_t value,int count)20 static inline void sk_memset16(uint16_t buffer[], uint16_t value, int count) {
21 SkOpts::memset16(buffer, value, count);
22 }
sk_memset32(uint32_t buffer[],uint32_t value,int count)23 static inline void sk_memset32(uint32_t buffer[], uint32_t value, int count) {
24 SkOpts::memset32(buffer, value, count);
25 }
sk_memset64(uint64_t buffer[],uint64_t value,int count)26 static inline void sk_memset64(uint64_t buffer[], uint64_t value, int count) {
27 SkOpts::memset64(buffer, value, count);
28 }
29
30 ///////////////////////////////////////////////////////////////////////////////
31
32 // Unlike the functions in SkUTF.h, these two functions do not take an array
33 // length parameter. When possible, use SkUTF::NextUTF{8,16} instead.
34 SkUnichar SkUTF8_NextUnichar(const char**);
35 SkUnichar SkUTF16_NextUnichar(const uint16_t**);
36
37 ///////////////////////////////////////////////////////////////////////////////
38
SkUTF16_IsLeadingSurrogate(uint16_t c)39 static inline bool SkUTF16_IsLeadingSurrogate(uint16_t c) { return ((c) & 0xFC00) == 0xD800; }
40
SkUTF16_IsTrailingSurrogate(uint16_t c)41 static inline bool SkUTF16_IsTrailingSurrogate (uint16_t c) { return ((c) & 0xFC00) == 0xDC00; }
42
43 ///////////////////////////////////////////////////////////////////////////////
44
SkUTFN_CountUnichars(SkTypeface::Encoding enc,const void * utfN,size_t bytes)45 static inline int SkUTFN_CountUnichars(SkTypeface::Encoding enc, const void* utfN, size_t bytes) {
46 switch (enc) {
47 case SkTypeface::kUTF8_Encoding: return SkUTF::CountUTF8((const char*)utfN, bytes);
48 case SkTypeface::kUTF16_Encoding: return SkUTF::CountUTF16((const uint16_t*)utfN, bytes);
49 case SkTypeface::kUTF32_Encoding: return SkUTF::CountUTF32((const int32_t*)utfN, bytes);
50 default: SkDEBUGFAIL("unknown text encoding"); return -1;
51 }
52 }
53
SkUTFN_Next(SkTypeface::Encoding enc,const void ** ptr,const void * stop)54 static inline SkUnichar SkUTFN_Next(SkTypeface::Encoding enc,
55 const void** ptr, const void* stop) {
56 switch (enc) {
57 case SkTypeface::kUTF8_Encoding:
58 return SkUTF::NextUTF8((const char**)ptr, (const char*)stop);
59 case SkTypeface::kUTF16_Encoding:
60 return SkUTF::NextUTF16((const uint16_t**)ptr, (const uint16_t*)stop);
61 case SkTypeface::kUTF32_Encoding:
62 return SkUTF::NextUTF32((const int32_t**)ptr, (const int32_t*)stop);
63 default: SkDEBUGFAIL("unknown text encoding"); return -1;
64 }
65 }
66
67 ///////////////////////////////////////////////////////////////////////////////
68
69 namespace SkHexadecimalDigits {
70 extern const char gUpper[16]; // 0-9A-F
71 extern const char gLower[16]; // 0-9a-f
72 }
73
74 #endif
75