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