reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SkUtils_DEFINED |
| 18 | #define SkUtils_DEFINED |
| 19 | |
| 20 | #include "SkTypes.h" |
| 21 | |
| 22 | /////////////////////////////////////////////////////////////////////////// |
| 23 | |
| 24 | /** Similar to memset(), but it assigns a 16bit value into the buffer. |
| 25 | @param buffer The memory to have value copied into it |
| 26 | @param value The 16bit value to be copied into buffer |
| 27 | @param count The number of times value should be copied into the buffer. |
| 28 | */ |
| 29 | void sk_memset16_portable(uint16_t dst[], uint16_t value, int count); |
| 30 | |
| 31 | /** Similar to memset(), but it assigns a 32bit value into the buffer. |
| 32 | @param buffer The memory to have value copied into it |
| 33 | @param value The 32bit value to be copied into buffer |
| 34 | @param count The number of times value should be copied into the buffer. |
| 35 | */ |
| 36 | void sk_memset32_portable(uint32_t dst[], uint32_t value, int count); |
| 37 | |
| 38 | #ifdef ANDROID |
| 39 | #include "cutils/memory.h" |
| 40 | |
| 41 | #define sk_memset16(dst, value, count) android_memset16(dst, value, (count) << 1) |
| 42 | #define sk_memset32(dst, value, count) android_memset32(dst, value, (count) << 2) |
| 43 | #endif |
| 44 | |
| 45 | #ifndef sk_memset16 |
| 46 | #define sk_memset16(dst, value, count) sk_memset16_portable(dst, value, count) |
| 47 | #endif |
| 48 | |
| 49 | #ifndef sk_memset32 |
| 50 | #define sk_memset32(dst, value, count) sk_memset32_portable(dst, value, count) |
| 51 | #endif |
| 52 | |
| 53 | |
| 54 | /////////////////////////////////////////////////////////////////////////// |
| 55 | |
| 56 | #define kMaxBytesInUTF8Sequence 4 |
| 57 | |
| 58 | #ifdef SK_DEBUG |
| 59 | int SkUTF8_LeadByteToCount(unsigned c); |
| 60 | #else |
| 61 | #define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1) |
| 62 | #endif |
| 63 | |
| 64 | inline int SkUTF8_CountUTF8Bytes(const char utf8[]) |
| 65 | { |
| 66 | SkASSERT(utf8); |
| 67 | return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8); |
| 68 | } |
| 69 | |
| 70 | int SkUTF8_CountUnichars(const char utf8[]); |
| 71 | int SkUTF8_CountUnichars(const char utf8[], size_t byteLength); |
| 72 | SkUnichar SkUTF8_ToUnichar(const char utf8[]); |
| 73 | SkUnichar SkUTF8_NextUnichar(const char**); |
| 74 | SkUnichar SkUTF8_PrevUnichar(const char**); |
| 75 | |
| 76 | /** Return the number of bytes need to convert a unichar |
| 77 | into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence, |
| 78 | or 0 if uni is illegal. |
| 79 | */ |
| 80 | size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL); |
| 81 | |
| 82 | /////////////////////////////////////////////////////////////////////////////// |
| 83 | |
| 84 | #define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800) |
| 85 | #define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00) |
| 86 | |
| 87 | int SkUTF16_CountUnichars(const uint16_t utf16[]); |
| 88 | int SkUTF16_CountUnichars(const uint16_t utf16[], |
| 89 | int numberOf16BitValues); |
| 90 | // returns the current unichar and then moves past it (*p++) |
| 91 | SkUnichar SkUTF16_NextUnichar(const uint16_t**); |
| 92 | // this guy backs up to the previus unichar value, and returns it (*--p) |
| 93 | SkUnichar SkUTF16_PrevUnichar(const uint16_t**); |
| 94 | size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL); |
| 95 | |
| 96 | size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues, |
| 97 | char utf8[] = NULL); |
| 98 | |
| 99 | class SkUtils { |
| 100 | public: |
| 101 | #ifdef SK_DEBUG |
| 102 | static void UnitTest(); |
| 103 | #endif |
| 104 | }; |
| 105 | |
| 106 | /////////////////////////////////////////////////////////////////////////////// |
| 107 | |
| 108 | class SkAutoTrace { |
| 109 | public: |
| 110 | /** NOTE: label contents are not copied, just the ptr is |
| 111 | retained, so DON'T DELETE IT. |
| 112 | */ |
| 113 | SkAutoTrace(const char label[]) : fLabel(label) { |
| 114 | SkDebugf("--- trace: %s Enter\n", fLabel); |
| 115 | } |
| 116 | ~SkAutoTrace() { |
| 117 | SkDebugf("--- trace: %s Leave\n", fLabel); |
| 118 | } |
| 119 | private: |
| 120 | const char* fLabel; |
| 121 | }; |
| 122 | |
| 123 | /////////////////////////////////////////////////////////////////////////////// |
| 124 | |
| 125 | class SkAutoMemoryUsageProbe { |
| 126 | public: |
| 127 | /** Record memory usage in constructor, and dump the result |
| 128 | (delta and current total) in the destructor, with the optional |
| 129 | label. NOTE: label contents are not copied, just the ptr is |
| 130 | retained, so DON'T DELETE IT. |
| 131 | */ |
| 132 | SkAutoMemoryUsageProbe(const char label[]); |
| 133 | ~SkAutoMemoryUsageProbe(); |
| 134 | private: |
| 135 | const char* fLabel; |
| 136 | size_t fBytesAllocated; |
| 137 | }; |
| 138 | |
| 139 | #endif |
| 140 | |