зеркало из https://github.com/mozilla/pjs.git
144 строки
4.6 KiB
C++
144 строки
4.6 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkUtils_DEFINED
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#define SkUtils_DEFINED
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#include "SkTypes.h"
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///////////////////////////////////////////////////////////////////////////////
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/** Similar to memset(), but it assigns a 16bit value into the buffer.
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@param buffer The memory to have value copied into it
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@param value The 16bit value to be copied into buffer
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@param count The number of times value should be copied into the buffer.
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*/
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void sk_memset16_portable(uint16_t dst[], uint16_t value, int count);
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typedef void (*SkMemset16Proc)(uint16_t dst[], uint16_t value, int count);
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SkMemset16Proc SkMemset16GetPlatformProc();
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/** Similar to memset(), but it assigns a 32bit value into the buffer.
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@param buffer The memory to have value copied into it
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@param value The 32bit value to be copied into buffer
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@param count The number of times value should be copied into the buffer.
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*/
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void sk_memset32_portable(uint32_t dst[], uint32_t value, int count);
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typedef void (*SkMemset32Proc)(uint32_t dst[], uint32_t value, int count);
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SkMemset32Proc SkMemset32GetPlatformProc();
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#if defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_ANDROID_NDK)
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#include "cutils/memory.h"
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#define sk_memset16(dst, value, count) android_memset16(dst, value, (count) << 1)
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#define sk_memset32(dst, value, count) android_memset32(dst, value, (count) << 2)
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#endif
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#ifndef sk_memset16
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extern SkMemset16Proc sk_memset16;
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#endif
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#ifndef sk_memset32
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extern SkMemset32Proc sk_memset32;
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#endif
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///////////////////////////////////////////////////////////////////////////////
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#define kMaxBytesInUTF8Sequence 4
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#ifdef SK_DEBUG
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int SkUTF8_LeadByteToCount(unsigned c);
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#else
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#define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1)
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#endif
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inline int SkUTF8_CountUTF8Bytes(const char utf8[]) {
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SkASSERT(utf8);
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return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8);
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}
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int SkUTF8_CountUnichars(const char utf8[]);
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int SkUTF8_CountUnichars(const char utf8[], size_t byteLength);
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SkUnichar SkUTF8_ToUnichar(const char utf8[]);
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SkUnichar SkUTF8_NextUnichar(const char**);
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SkUnichar SkUTF8_PrevUnichar(const char**);
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/** Return the number of bytes need to convert a unichar
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into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence,
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or 0 if uni is illegal.
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*/
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size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL);
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///////////////////////////////////////////////////////////////////////////////
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#define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800)
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#define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00)
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int SkUTF16_CountUnichars(const uint16_t utf16[]);
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int SkUTF16_CountUnichars(const uint16_t utf16[],
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int numberOf16BitValues);
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// returns the current unichar and then moves past it (*p++)
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SkUnichar SkUTF16_NextUnichar(const uint16_t**);
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// this guy backs up to the previus unichar value, and returns it (*--p)
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SkUnichar SkUTF16_PrevUnichar(const uint16_t**);
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size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL);
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size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues,
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char utf8[] = NULL);
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inline bool SkUnichar_IsVariationSelector(SkUnichar uni) {
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/* The 'true' ranges are:
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* 0x180B <= uni <= 0x180D
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* 0xFE00 <= uni <= 0xFE0F
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* 0xE0100 <= uni <= 0xE01EF
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*/
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if (uni < 0x180B || uni > 0xE01EF) {
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return false;
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}
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if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) {
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return false;
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}
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return true;
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}
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///////////////////////////////////////////////////////////////////////////////
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class SkAutoTrace {
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public:
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/** NOTE: label contents are not copied, just the ptr is
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retained, so DON'T DELETE IT.
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*/
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SkAutoTrace(const char label[]) : fLabel(label) {
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SkDebugf("--- trace: %s Enter\n", fLabel);
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}
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~SkAutoTrace() {
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SkDebugf("--- trace: %s Leave\n", fLabel);
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}
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private:
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const char* fLabel;
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};
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///////////////////////////////////////////////////////////////////////////////
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class SkAutoMemoryUsageProbe {
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public:
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/** Record memory usage in constructor, and dump the result
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(delta and current total) in the destructor, with the optional
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label. NOTE: label contents are not copied, just the ptr is
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retained, so DON'T DELETE IT.
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*/
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SkAutoMemoryUsageProbe(const char label[]);
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~SkAutoMemoryUsageProbe();
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private:
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const char* fLabel;
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size_t fBytesAllocated;
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};
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#endif
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