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- /*
- * 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 "include/core/SkFontTypes.h"
- #include "src/core/SkOpts.h"
- #include "src/utils/SkUTF.h"
- /** Similar to memset(), but it assigns a 16, 32, or 64-bit value into the buffer.
- @param buffer The memory to have value copied into it
- @param value The value to be copied into buffer
- @param count The number of times value should be copied into the buffer.
- */
- static inline void sk_memset16(uint16_t buffer[], uint16_t value, int count) {
- SkOpts::memset16(buffer, value, count);
- }
- static inline void sk_memset32(uint32_t buffer[], uint32_t value, int count) {
- SkOpts::memset32(buffer, value, count);
- }
- static inline void sk_memset64(uint64_t buffer[], uint64_t value, int count) {
- SkOpts::memset64(buffer, value, count);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // Unlike the functions in SkUTF.h, these two functions do not take an array
- // length parameter. When possible, use SkUTF::NextUTF{8,16} instead.
- SkUnichar SkUTF8_NextUnichar(const char**);
- SkUnichar SkUTF16_NextUnichar(const uint16_t**);
- ///////////////////////////////////////////////////////////////////////////////
- static inline bool SkUTF16_IsLeadingSurrogate(uint16_t c) { return ((c) & 0xFC00) == 0xD800; }
- static inline bool SkUTF16_IsTrailingSurrogate (uint16_t c) { return ((c) & 0xFC00) == 0xDC00; }
- ///////////////////////////////////////////////////////////////////////////////
- static inline int SkUTFN_CountUnichars(SkTextEncoding enc, const void* utfN, size_t bytes) {
- switch (enc) {
- case SkTextEncoding::kUTF8: return SkUTF::CountUTF8((const char*)utfN, bytes);
- case SkTextEncoding::kUTF16: return SkUTF::CountUTF16((const uint16_t*)utfN, bytes);
- case SkTextEncoding::kUTF32: return SkUTF::CountUTF32((const int32_t*)utfN, bytes);
- default: SkDEBUGFAIL("unknown text encoding"); return -1;
- }
- }
- static inline SkUnichar SkUTFN_Next(SkTextEncoding enc, const void** ptr, const void* stop) {
- switch (enc) {
- case SkTextEncoding::kUTF8:
- return SkUTF::NextUTF8((const char**)ptr, (const char*)stop);
- case SkTextEncoding::kUTF16:
- return SkUTF::NextUTF16((const uint16_t**)ptr, (const uint16_t*)stop);
- case SkTextEncoding::kUTF32:
- return SkUTF::NextUTF32((const int32_t**)ptr, (const int32_t*)stop);
- default: SkDEBUGFAIL("unknown text encoding"); return -1;
- }
- }
- ///////////////////////////////////////////////////////////////////////////////
- namespace SkHexadecimalDigits {
- extern const char gUpper[16]; // 0-9A-F
- extern const char gLower[16]; // 0-9a-f
- }
- ///////////////////////////////////////////////////////////////////////////////
- // If T is an 8-byte GCC or Clang vector extension type, it would naturally
- // pass or return in the MMX mm0 register on 32-bit x86 builds. This has the
- // fun side effect of clobbering any state in the x87 st0 register. (There is
- // no ABI governing who should preserve mm?/st? registers, so no one does!)
- //
- // We force-inline sk_unaligned_load() and sk_unaligned_store() to avoid that,
- // making them safe to use for all types on all platforms, thus solving the
- // problem once and for all!
- template <typename T, typename P>
- static SK_ALWAYS_INLINE T sk_unaligned_load(const P* ptr) {
- // TODO: static_assert desirable things about T here so as not to be totally abused.
- T val;
- memcpy(&val, ptr, sizeof(val));
- return val;
- }
- template <typename T, typename P>
- static SK_ALWAYS_INLINE void sk_unaligned_store(P* ptr, T val) {
- // TODO: ditto
- memcpy(ptr, &val, sizeof(val));
- }
- #endif
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