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Unified Diff: src/v8utils.h

Issue 250733004: Enter a description of the change. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 6 years, 8 months ago
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Index: src/v8utils.h
diff --git a/src/v8utils.h b/src/v8utils.h
deleted file mode 100644
index ef3b004c6de4db3ee64daa66dbc58f06847e6f3c..0000000000000000000000000000000000000000
--- a/src/v8utils.h
+++ /dev/null
@@ -1,475 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_V8UTILS_H_
-#define V8_V8UTILS_H_
-
-#include "utils.h"
-#include "platform.h" // For va_list on Solaris.
-
-namespace v8 {
-namespace internal {
-
-// ----------------------------------------------------------------------------
-// I/O support.
-
-#if __GNUC__ >= 4
-// On gcc we can ask the compiler to check the types of %d-style format
-// specifiers and their associated arguments. TODO(erikcorry) fix this
-// so it works on MacOSX.
-#if defined(__MACH__) && defined(__APPLE__)
-#define PRINTF_CHECKING
-#define FPRINTF_CHECKING
-#define PRINTF_METHOD_CHECKING
-#define FPRINTF_METHOD_CHECKING
-#else // MacOsX.
-#define PRINTF_CHECKING __attribute__ ((format (printf, 1, 2)))
-#define FPRINTF_CHECKING __attribute__ ((format (printf, 2, 3)))
-#define PRINTF_METHOD_CHECKING __attribute__ ((format (printf, 2, 3)))
-#define FPRINTF_METHOD_CHECKING __attribute__ ((format (printf, 3, 4)))
-#endif
-#else
-#define PRINTF_CHECKING
-#define FPRINTF_CHECKING
-#define PRINTF_METHOD_CHECKING
-#define FPRINTF_METHOD_CHECKING
-#endif
-
-// Our version of printf().
-void PRINTF_CHECKING PrintF(const char* format, ...);
-void FPRINTF_CHECKING PrintF(FILE* out, const char* format, ...);
-
-// Prepends the current process ID to the output.
-void PRINTF_CHECKING PrintPID(const char* format, ...);
-
-// Our version of fflush.
-void Flush(FILE* out);
-
-inline void Flush() {
- Flush(stdout);
-}
-
-
-// Read a line of characters after printing the prompt to stdout. The resulting
-// char* needs to be disposed off with DeleteArray by the caller.
-char* ReadLine(const char* prompt);
-
-
-// Read and return the raw bytes in a file. the size of the buffer is returned
-// in size.
-// The returned buffer must be freed by the caller.
-byte* ReadBytes(const char* filename, int* size, bool verbose = true);
-
-
-// Append size chars from str to the file given by filename.
-// The file is overwritten. Returns the number of chars written.
-int AppendChars(const char* filename,
- const char* str,
- int size,
- bool verbose = true);
-
-
-// Write size chars from str to the file given by filename.
-// The file is overwritten. Returns the number of chars written.
-int WriteChars(const char* filename,
- const char* str,
- int size,
- bool verbose = true);
-
-
-// Write size bytes to the file given by filename.
-// The file is overwritten. Returns the number of bytes written.
-int WriteBytes(const char* filename,
- const byte* bytes,
- int size,
- bool verbose = true);
-
-
-// Write the C code
-// const char* <varname> = "<str>";
-// const int <varname>_len = <len>;
-// to the file given by filename. Only the first len chars are written.
-int WriteAsCFile(const char* filename, const char* varname,
- const char* str, int size, bool verbose = true);
-
-
-// ----------------------------------------------------------------------------
-// Data structures
-
-template <typename T>
-inline Vector< Handle<Object> > HandleVector(v8::internal::Handle<T>* elms,
- int length) {
- return Vector< Handle<Object> >(
- reinterpret_cast<v8::internal::Handle<Object>*>(elms), length);
-}
-
-
-// ----------------------------------------------------------------------------
-// Memory
-
-// Copies words from |src| to |dst|. The data spans must not overlap.
-template <typename T>
-inline void CopyWords(T* dst, const T* src, size_t num_words) {
- STATIC_ASSERT(sizeof(T) == kPointerSize);
- ASSERT(Min(dst, const_cast<T*>(src)) + num_words <=
- Max(dst, const_cast<T*>(src)));
- ASSERT(num_words > 0);
-
- // Use block copying OS::MemCopy if the segment we're copying is
- // enough to justify the extra call/setup overhead.
- static const size_t kBlockCopyLimit = 16;
-
- if (num_words < kBlockCopyLimit) {
- do {
- num_words--;
- *dst++ = *src++;
- } while (num_words > 0);
- } else {
- OS::MemCopy(dst, src, num_words * kPointerSize);
- }
-}
-
-
-// Copies words from |src| to |dst|. No restrictions.
-template <typename T>
-inline void MoveWords(T* dst, const T* src, size_t num_words) {
- STATIC_ASSERT(sizeof(T) == kPointerSize);
- ASSERT(num_words > 0);
-
- // Use block copying OS::MemCopy if the segment we're copying is
- // enough to justify the extra call/setup overhead.
- static const size_t kBlockCopyLimit = 16;
-
- if (num_words < kBlockCopyLimit &&
- ((dst < src) || (dst >= (src + num_words * kPointerSize)))) {
- T* end = dst + num_words;
- do {
- num_words--;
- *dst++ = *src++;
- } while (num_words > 0);
- } else {
- OS::MemMove(dst, src, num_words * kPointerSize);
- }
-}
-
-
-// Copies data from |src| to |dst|. The data spans must not overlap.
-template <typename T>
-inline void CopyBytes(T* dst, const T* src, size_t num_bytes) {
- STATIC_ASSERT(sizeof(T) == 1);
- ASSERT(Min(dst, const_cast<T*>(src)) + num_bytes <=
- Max(dst, const_cast<T*>(src)));
- if (num_bytes == 0) return;
-
- // Use block copying OS::MemCopy if the segment we're copying is
- // enough to justify the extra call/setup overhead.
- static const int kBlockCopyLimit = OS::kMinComplexMemCopy;
-
- if (num_bytes < static_cast<size_t>(kBlockCopyLimit)) {
- do {
- num_bytes--;
- *dst++ = *src++;
- } while (num_bytes > 0);
- } else {
- OS::MemCopy(dst, src, num_bytes);
- }
-}
-
-
-template <typename T, typename U>
-inline void MemsetPointer(T** dest, U* value, int counter) {
-#ifdef DEBUG
- T* a = NULL;
- U* b = NULL;
- a = b; // Fake assignment to check assignability.
- USE(a);
-#endif // DEBUG
-#if V8_HOST_ARCH_IA32
-#define STOS "stosl"
-#elif V8_HOST_ARCH_X64
-#define STOS "stosq"
-#endif
-#if defined(__native_client__)
- // This STOS sequence does not validate for x86_64 Native Client.
- // Here we #undef STOS to force use of the slower C version.
- // TODO(bradchen): Profile V8 and implement a faster REP STOS
- // here if the profile indicates it matters.
-#undef STOS
-#endif
-
-#if defined(MEMORY_SANITIZER)
- // MemorySanitizer does not understand inline assembly.
-#undef STOS
-#endif
-
-#if defined(__GNUC__) && defined(STOS)
- asm volatile(
- "cld;"
- "rep ; " STOS
- : "+&c" (counter), "+&D" (dest)
- : "a" (value)
- : "memory", "cc");
-#else
- for (int i = 0; i < counter; i++) {
- dest[i] = value;
- }
-#endif
-
-#undef STOS
-}
-
-
-// Simple wrapper that allows an ExternalString to refer to a
-// Vector<const char>. Doesn't assume ownership of the data.
-class AsciiStringAdapter: public v8::String::ExternalAsciiStringResource {
- public:
- explicit AsciiStringAdapter(Vector<const char> data) : data_(data) {}
-
- virtual const char* data() const { return data_.start(); }
-
- virtual size_t length() const { return data_.length(); }
-
- private:
- Vector<const char> data_;
-};
-
-
-// Simple support to read a file into a 0-terminated C-string.
-// The returned buffer must be freed by the caller.
-// On return, *exits tells whether the file existed.
-Vector<const char> ReadFile(const char* filename,
- bool* exists,
- bool verbose = true);
-Vector<const char> ReadFile(FILE* file,
- bool* exists,
- bool verbose = true);
-
-
-template <typename sourcechar, typename sinkchar>
-INLINE(static void CopyCharsUnsigned(sinkchar* dest,
- const sourcechar* src,
- int chars));
-#if defined(V8_HOST_ARCH_ARM)
-INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars));
-INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src, int chars));
-INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars));
-#elif defined(V8_HOST_ARCH_MIPS)
-INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars));
-INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars));
-#endif
-
-// Copy from ASCII/16bit chars to ASCII/16bit chars.
-template <typename sourcechar, typename sinkchar>
-INLINE(void CopyChars(sinkchar* dest, const sourcechar* src, int chars));
-
-template<typename sourcechar, typename sinkchar>
-void CopyChars(sinkchar* dest, const sourcechar* src, int chars) {
- ASSERT(sizeof(sourcechar) <= 2);
- ASSERT(sizeof(sinkchar) <= 2);
- if (sizeof(sinkchar) == 1) {
- if (sizeof(sourcechar) == 1) {
- CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest),
- reinterpret_cast<const uint8_t*>(src),
- chars);
- } else {
- CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest),
- reinterpret_cast<const uint16_t*>(src),
- chars);
- }
- } else {
- if (sizeof(sourcechar) == 1) {
- CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest),
- reinterpret_cast<const uint8_t*>(src),
- chars);
- } else {
- CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest),
- reinterpret_cast<const uint16_t*>(src),
- chars);
- }
- }
-}
-
-template <typename sourcechar, typename sinkchar>
-void CopyCharsUnsigned(sinkchar* dest, const sourcechar* src, int chars) {
- sinkchar* limit = dest + chars;
-#ifdef V8_HOST_CAN_READ_UNALIGNED
- if (sizeof(*dest) == sizeof(*src)) {
- if (chars >= static_cast<int>(OS::kMinComplexMemCopy / sizeof(*dest))) {
- OS::MemCopy(dest, src, chars * sizeof(*dest));
- return;
- }
- // Number of characters in a uintptr_t.
- static const int kStepSize = sizeof(uintptr_t) / sizeof(*dest); // NOLINT
- ASSERT(dest + kStepSize > dest); // Check for overflow.
- while (dest + kStepSize <= limit) {
- *reinterpret_cast<uintptr_t*>(dest) =
- *reinterpret_cast<const uintptr_t*>(src);
- dest += kStepSize;
- src += kStepSize;
- }
- }
-#endif
- while (dest < limit) {
- *dest++ = static_cast<sinkchar>(*src++);
- }
-}
-
-
-#if defined(V8_HOST_ARCH_ARM)
-void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars) {
- switch (static_cast<unsigned>(chars)) {
- case 0:
- break;
- case 1:
- *dest = *src;
- break;
- case 2:
- memcpy(dest, src, 2);
- break;
- case 3:
- memcpy(dest, src, 3);
- break;
- case 4:
- memcpy(dest, src, 4);
- break;
- case 5:
- memcpy(dest, src, 5);
- break;
- case 6:
- memcpy(dest, src, 6);
- break;
- case 7:
- memcpy(dest, src, 7);
- break;
- case 8:
- memcpy(dest, src, 8);
- break;
- case 9:
- memcpy(dest, src, 9);
- break;
- case 10:
- memcpy(dest, src, 10);
- break;
- case 11:
- memcpy(dest, src, 11);
- break;
- case 12:
- memcpy(dest, src, 12);
- break;
- case 13:
- memcpy(dest, src, 13);
- break;
- case 14:
- memcpy(dest, src, 14);
- break;
- case 15:
- memcpy(dest, src, 15);
- break;
- default:
- OS::MemCopy(dest, src, chars);
- break;
- }
-}
-
-
-void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src, int chars) {
- if (chars >= OS::kMinComplexConvertMemCopy) {
- OS::MemCopyUint16Uint8(dest, src, chars);
- } else {
- OS::MemCopyUint16Uint8Wrapper(dest, src, chars);
- }
-}
-
-
-void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars) {
- switch (static_cast<unsigned>(chars)) {
- case 0:
- break;
- case 1:
- *dest = *src;
- break;
- case 2:
- memcpy(dest, src, 4);
- break;
- case 3:
- memcpy(dest, src, 6);
- break;
- case 4:
- memcpy(dest, src, 8);
- break;
- case 5:
- memcpy(dest, src, 10);
- break;
- case 6:
- memcpy(dest, src, 12);
- break;
- case 7:
- memcpy(dest, src, 14);
- break;
- default:
- OS::MemCopy(dest, src, chars * sizeof(*dest));
- break;
- }
-}
-
-
-#elif defined(V8_HOST_ARCH_MIPS)
-void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars) {
- if (chars < OS::kMinComplexMemCopy) {
- memcpy(dest, src, chars);
- } else {
- OS::MemCopy(dest, src, chars);
- }
-}
-
-void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars) {
- if (chars < OS::kMinComplexMemCopy) {
- memcpy(dest, src, chars * sizeof(*dest));
- } else {
- OS::MemCopy(dest, src, chars * sizeof(*dest));
- }
-}
-#endif
-
-
-class StringBuilder : public SimpleStringBuilder {
- public:
- explicit StringBuilder(int size) : SimpleStringBuilder(size) { }
- StringBuilder(char* buffer, int size) : SimpleStringBuilder(buffer, size) { }
-
- // Add formatted contents to the builder just like printf().
- void AddFormatted(const char* format, ...);
-
- // Add formatted contents like printf based on a va_list.
- void AddFormattedList(const char* format, va_list list);
- private:
- DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
-};
-
-} } // namespace v8::internal
-
-#endif // V8_V8UTILS_H_
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