#$@%#$%!

Ngiler SH3LL 360
: / opt / alt / alt-nodejs18 / root / usr / include / unicode /

Information Server
MySQL : OFF Perl : OFF CURL : ON WGET : OFF PKEXEC : OFF

Directive	Local Value
IP Address	162.0.209.101
System	Linux premium169.web-hosting.com 4.18.0-553.50.1.lve.el8.x86_64 #1 SMP Thu Apr 17 19:10:24 UTC 2025 x86_64
User	luxeelil
PHP Version	8.0.30
Software	LiteSpeed
Doc root	Writable

Edit File : bytestream.h \| Size : 10.75 KB
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html // Copyright (C) 2009-2012, International Business Machines // Corporation and others. All Rights Reserved. // // Copyright 2007 Google Inc. All Rights Reserved. // Author: sanjay@google.com (Sanjay Ghemawat) // // Abstract interface that consumes a sequence of bytes (ByteSink). // // Used so that we can write a single piece of code that can operate // on a variety of output string types. // // Various implementations of this interface are provided: // ByteSink: // CheckedArrayByteSink Write to a flat array, with bounds checking // StringByteSink Write to an STL string // This code is a contribution of Google code, and the style used here is // a compromise between the original Google code and the ICU coding guidelines. // For example, data types are ICU-ified (size_t,int->int32_t), // and API comments doxygen-ified, but function names and behavior are // as in the original, if possible. // Assertion-style error handling, not available in ICU, was changed to // parameter "pinning" similar to UnicodeString. // // In addition, this is only a partial port of the original Google code, // limited to what was needed so far. The (nearly) complete original code // is in the ICU svn repository at icuhtml/trunk/design/strings/contrib // (see ICU ticket 6765, r25517). #ifndef __BYTESTREAM_H__ #define __BYTESTREAM_H__ /** * \file * \brief C++ API: Interface for writing bytes, and implementation classes. / #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/uobject.h" #include "unicode/std_string.h" U_NAMESPACE_BEGIN /* * A ByteSink can be filled with bytes. * @stable ICU 4.2 / class U_COMMON_API ByteSink : public UMemory { public: /* * Default constructor. * @stable ICU 4.2 / ByteSink() { } /* * Virtual destructor. * @stable ICU 4.2 / virtual ~ByteSink(); /* * Append "bytes[0,n-1]" to this. * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 4.2 / virtual void Append(const char bytes, int32_t n) = 0; /** * Appends n bytes to this. Same as Append(). * Call AppendU8() with u8"string literals" which are const char * in C++11 * but const char8_t * in C++20. * If the compiler does support char8_t as a distinct type, * then an AppendU8() overload for that is defined and will be chosen. * * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 67 / inline void AppendU8(const char bytes, int32_t n) { Append(bytes, n); } #if defined(__cpp_char8_t) \|\| defined(U_IN_DOXYGEN) /** * Appends n bytes to this. Same as Append() but for a const char8_t * pointer. * Call AppendU8() with u8"string literals" which are const char * in C++11 * but const char8_t * in C++20. * If the compiler does support char8_t as a distinct type, * then this AppendU8() overload for that is defined and will be chosen. * * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 67 / inline void AppendU8(const char8_t bytes, int32_t n) { Append(reinterpret_cast<const char>(bytes), n); } #endif /* * Returns a writable buffer for appending and writes the buffer's capacity to * result_capacity. Guarantees result_capacity>=min_capacity. * May return a pointer to the caller-owned scratch buffer which must have * scratch_capacity>=min_capacity. * The returned buffer is only valid until the next operation * on this ByteSink. * * After writing at most result_capacity bytes, call Append() with the pointer returned from this function and the number of bytes written. * Many Append() implementations will avoid copying bytes if this function * returned an internal buffer. * * Partial usage example: * int32_t capacity; * char* buffer = sink->GetAppendBuffer(..., &capacity); * ... Write n bytes into buffer, with n <= capacity. * sink->Append(buffer, n); * In many implementations, that call to Append will avoid copying bytes. * * If the ByteSink allocates or reallocates an internal buffer, it should use * the desired_capacity_hint if appropriate. * If a caller cannot provide a reasonable guess at the desired capacity, * it should pass desired_capacity_hint=0. * * If a non-scratch buffer is returned, the caller may only pass * a prefix to it to Append(). * That is, it is not correct to pass an interior pointer to Append(). * * The default implementation always returns the scratch buffer. * * @param min_capacity required minimum capacity of the returned buffer; * must be non-negative * @param desired_capacity_hint desired capacity of the returned buffer; * must be non-negative * @param scratch default caller-owned buffer * @param scratch_capacity capacity of the scratch buffer * @param result_capacity pointer to an integer which will be set to the * capacity of the returned buffer * @return a buffer with result_capacity>=min_capacity @stable ICU 4.2 / virtual char GetAppendBuffer(int32_t min_capacity, int32_t desired_capacity_hint, char* scratch, int32_t scratch_capacity, int32_t* result_capacity); /** * Flush internal buffers. * Some byte sinks use internal buffers or provide buffering * and require calling Flush() at the end of the stream. * The ByteSink should be ready for further Append() calls after Flush(). * The default implementation of Flush() does nothing. * @stable ICU 4.2 / virtual void Flush(); private: ByteSink(const ByteSink &) = delete; ByteSink &operator=(const ByteSink &) = delete; }; // ------------------------------------------------------------- // Some standard implementations /* * Implementation of ByteSink that writes to a flat byte array, * with bounds-checking: * This sink will not write more than capacity bytes to outbuf. * If more than capacity bytes are Append()ed, then excess bytes are ignored, * and Overflowed() will return true. * Overflow does not cause a runtime error. * @stable ICU 4.2 / class U_COMMON_API CheckedArrayByteSink : public ByteSink { public: /* * Constructs a ByteSink that will write to outbuf[0..capacity-1]. * @param outbuf buffer to write to * @param capacity size of the buffer * @stable ICU 4.2 / CheckedArrayByteSink(char outbuf, int32_t capacity); /** * Destructor. * @stable ICU 4.2 / virtual ~CheckedArrayByteSink(); /* * Returns the sink to its original state, without modifying the buffer. * Useful for reusing both the buffer and the sink for multiple streams. * Resets the state to NumberOfBytesWritten()=NumberOfBytesAppended()=0 * and Overflowed()=false. * @return this @stable ICU 4.6 / virtual CheckedArrayByteSink& Reset(); /* * Append "bytes[0,n-1]" to this. * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 4.2 / virtual void Append(const char bytes, int32_t n) override; /** * Returns a writable buffer for appending and writes the buffer's capacity to * result_capacity. For details see the base class documentation. @param min_capacity required minimum capacity of the returned buffer; * must be non-negative * @param desired_capacity_hint desired capacity of the returned buffer; * must be non-negative * @param scratch default caller-owned buffer * @param scratch_capacity capacity of the scratch buffer * @param result_capacity pointer to an integer which will be set to the * capacity of the returned buffer * @return a buffer with result_capacity>=min_capacity @stable ICU 4.2 / virtual char GetAppendBuffer(int32_t min_capacity, int32_t desired_capacity_hint, char* scratch, int32_t scratch_capacity, int32_t* result_capacity) override; /** * Returns the number of bytes actually written to the sink. * @return number of bytes written to the buffer * @stable ICU 4.2 / int32_t NumberOfBytesWritten() const { return size_; } /* * Returns true if any bytes were discarded, i.e., if there was an * attempt to write more than 'capacity' bytes. * @return true if more than 'capacity' bytes were Append()ed * @stable ICU 4.2 / UBool Overflowed() const { return overflowed_; } /* * Returns the number of bytes appended to the sink. * If Overflowed() then NumberOfBytesAppended()>NumberOfBytesWritten() * else they return the same number. * @return number of bytes written to the buffer * @stable ICU 4.6 / int32_t NumberOfBytesAppended() const { return appended_; } private: char outbuf_; const int32_t capacity_; int32_t size_; int32_t appended_; UBool overflowed_; CheckedArrayByteSink() = delete; CheckedArrayByteSink(const CheckedArrayByteSink &) = delete; CheckedArrayByteSink &operator=(const CheckedArrayByteSink &) = delete; }; /** * Implementation of ByteSink that writes to a "string". * The StringClass is usually instantiated with a std::string. * @stable ICU 4.2 / template<typename StringClass> class StringByteSink : public ByteSink { public: /* * Constructs a ByteSink that will append bytes to the dest string. * @param dest pointer to string object to append to * @stable ICU 4.2 / StringByteSink(StringClass dest) : dest_(dest) { } /** * Constructs a ByteSink that reserves append capacity and will append bytes to the dest string. * * @param dest pointer to string object to append to * @param initialAppendCapacity capacity beyond dest->length() to be reserve()d * @stable ICU 60 / StringByteSink(StringClass dest, int32_t initialAppendCapacity) : dest_(dest) { if (initialAppendCapacity > 0 && (uint32_t)initialAppendCapacity > (dest->capacity() - dest->length())) { dest->reserve(dest->length() + initialAppendCapacity); } } /** * Append "bytes[0,n-1]" to this. * @param data the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 4.2 / virtual void Append(const char data, int32_t n) override { dest_->append(data, n); } private: StringClass* dest_; StringByteSink() = delete; StringByteSink(const StringByteSink &) = delete; StringByteSink &operator=(const StringByteSink &) = delete; }; U_NAMESPACE_END #endif /* U_SHOW_CPLUSPLUS_API */ #endif // __BYTESTREAM_H__ Back

Edit File : bytestream.h | Size : 10.75 KB

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// Copyright (C) 2009-2012, International Business Machines
// Corporation and others. All Rights Reserved.
//
// Copyright 2007 Google Inc. All Rights Reserved.
// Author: sanjay@google.com (Sanjay Ghemawat)
//
// Abstract interface that consumes a sequence of bytes (ByteSink).
//
// Used so that we can write a single piece of code that can operate
// on a variety of output string types.
//
// Various implementations of this interface are provided:
//   ByteSink:
//      CheckedArrayByteSink    Write to a flat array, with bounds checking
//      StringByteSink          Write to an STL string

// This code is a contribution of Google code, and the style used here is
// a compromise between the original Google code and the ICU coding guidelines.
// For example, data types are ICU-ified (size_t,int->int32_t),
// and API comments doxygen-ified, but function names and behavior are
// as in the original, if possible.
// Assertion-style error handling, not available in ICU, was changed to
// parameter "pinning" similar to UnicodeString.
//
// In addition, this is only a partial port of the original Google code,
// limited to what was needed so far. The (nearly) complete original code
// is in the ICU svn repository at icuhtml/trunk/design/strings/contrib
// (see ICU ticket 6765, r25517).

#ifndef __BYTESTREAM_H__
#define __BYTESTREAM_H__

/**
 * \file
 * \brief C++ API: Interface for writing bytes, and implementation classes.
 */

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/uobject.h"
#include "unicode/std_string.h"

U_NAMESPACE_BEGIN

/**
 * A ByteSink can be filled with bytes.
 * @stable ICU 4.2
 */
class U_COMMON_API ByteSink : public UMemory {
public:
  /**
   * Default constructor.
   * @stable ICU 4.2
   */
  ByteSink() { }
  /**
   * Virtual destructor.
   * @stable ICU 4.2
   */
  virtual ~ByteSink();

/**
   * Append "bytes[0,n-1]" to this.
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* bytes, int32_t n) = 0;

/**
   * Appends n bytes to this. Same as Append().
   * Call AppendU8() with u8"string literals" which are const char * in C++11
   * but const char8_t * in C++20.
   * If the compiler does support char8_t as a distinct type,
   * then an AppendU8() overload for that is defined and will be chosen.
   *
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 67
   */
  inline void AppendU8(const char* bytes, int32_t n) {
    Append(bytes, n);
  }

#if defined(__cpp_char8_t) || defined(U_IN_DOXYGEN)
  /**
   * Appends n bytes to this. Same as Append() but for a const char8_t * pointer.
   * Call AppendU8() with u8"string literals" which are const char * in C++11
   * but const char8_t * in C++20.
   * If the compiler does support char8_t as a distinct type,
   * then this AppendU8() overload for that is defined and will be chosen.
   *
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 67
   */
  inline void AppendU8(const char8_t* bytes, int32_t n) {
    Append(reinterpret_cast<const char*>(bytes), n);
  }
#endif

/**
   * Returns a writable buffer for appending and writes the buffer's capacity to
   * *result_capacity. Guarantees *result_capacity>=min_capacity.
   * May return a pointer to the caller-owned scratch buffer which must have
   * scratch_capacity>=min_capacity.
   * The returned buffer is only valid until the next operation
   * on this ByteSink.
   *
   * After writing at most *result_capacity bytes, call Append() with the
   * pointer returned from this function and the number of bytes written.
   * Many Append() implementations will avoid copying bytes if this function
   * returned an internal buffer.
   *
   * Partial usage example:
   *  int32_t capacity;
   *  char* buffer = sink->GetAppendBuffer(..., &capacity);
   *  ... Write n bytes into buffer, with n <= capacity.
   *  sink->Append(buffer, n);
   * In many implementations, that call to Append will avoid copying bytes.
   *
   * If the ByteSink allocates or reallocates an internal buffer, it should use
   * the desired_capacity_hint if appropriate.
   * If a caller cannot provide a reasonable guess at the desired capacity,
   * it should pass desired_capacity_hint=0.
   *
   * If a non-scratch buffer is returned, the caller may only pass
   * a prefix to it to Append().
   * That is, it is not correct to pass an interior pointer to Append().
   *
   * The default implementation always returns the scratch buffer.
   *
   * @param min_capacity required minimum capacity of the returned buffer;
   *                     must be non-negative
   * @param desired_capacity_hint desired capacity of the returned buffer;
   *                              must be non-negative
   * @param scratch default caller-owned buffer
   * @param scratch_capacity capacity of the scratch buffer
   * @param result_capacity pointer to an integer which will be set to the
   *                        capacity of the returned buffer
   * @return a buffer with *result_capacity>=min_capacity
   * @stable ICU 4.2
   */
  virtual char* GetAppendBuffer(int32_t min_capacity,
                                int32_t desired_capacity_hint,
                                char* scratch, int32_t scratch_capacity,
                                int32_t* result_capacity);

/**
   * Flush internal buffers.
   * Some byte sinks use internal buffers or provide buffering
   * and require calling Flush() at the end of the stream.
   * The ByteSink should be ready for further Append() calls after Flush().
   * The default implementation of Flush() does nothing.
   * @stable ICU 4.2
   */
  virtual void Flush();

private:
  ByteSink(const ByteSink &) = delete;
  ByteSink &operator=(const ByteSink &) = delete;
};

// -------------------------------------------------------------
// Some standard implementations

/** 
 * Implementation of ByteSink that writes to a flat byte array,
 * with bounds-checking:
 * This sink will not write more than capacity bytes to outbuf.
 * If more than capacity bytes are Append()ed, then excess bytes are ignored,
 * and Overflowed() will return true.
 * Overflow does not cause a runtime error.
 * @stable ICU 4.2
 */
class U_COMMON_API CheckedArrayByteSink : public ByteSink {
public:
  /**
   * Constructs a ByteSink that will write to outbuf[0..capacity-1].
   * @param outbuf buffer to write to
   * @param capacity size of the buffer
   * @stable ICU 4.2
   */
  CheckedArrayByteSink(char* outbuf, int32_t capacity);
  /**
   * Destructor.
   * @stable ICU 4.2
   */
  virtual ~CheckedArrayByteSink();
  /**
   * Returns the sink to its original state, without modifying the buffer.
   * Useful for reusing both the buffer and the sink for multiple streams.
   * Resets the state to NumberOfBytesWritten()=NumberOfBytesAppended()=0
   * and Overflowed()=false.
   * @return *this
   * @stable ICU 4.6
   */
  virtual CheckedArrayByteSink& Reset();
  /**
   * Append "bytes[0,n-1]" to this.
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* bytes, int32_t n) override;
  /**
   * Returns a writable buffer for appending and writes the buffer's capacity to
   * *result_capacity. For details see the base class documentation.
   * @param min_capacity required minimum capacity of the returned buffer;
   *                     must be non-negative
   * @param desired_capacity_hint desired capacity of the returned buffer;
   *                              must be non-negative
   * @param scratch default caller-owned buffer
   * @param scratch_capacity capacity of the scratch buffer
   * @param result_capacity pointer to an integer which will be set to the
   *                        capacity of the returned buffer
   * @return a buffer with *result_capacity>=min_capacity
   * @stable ICU 4.2
   */
  virtual char* GetAppendBuffer(int32_t min_capacity,
                                int32_t desired_capacity_hint,
                                char* scratch, int32_t scratch_capacity,
                                int32_t* result_capacity) override;
  /**
   * Returns the number of bytes actually written to the sink.
   * @return number of bytes written to the buffer
   * @stable ICU 4.2
   */
  int32_t NumberOfBytesWritten() const { return size_; }
  /**
   * Returns true if any bytes were discarded, i.e., if there was an
   * attempt to write more than 'capacity' bytes.
   * @return true if more than 'capacity' bytes were Append()ed
   * @stable ICU 4.2
   */
  UBool Overflowed() const { return overflowed_; }
  /**
   * Returns the number of bytes appended to the sink.
   * If Overflowed() then NumberOfBytesAppended()>NumberOfBytesWritten()
   * else they return the same number.
   * @return number of bytes written to the buffer
   * @stable ICU 4.6
   */
  int32_t NumberOfBytesAppended() const { return appended_; }
private:
  char* outbuf_;
  const int32_t capacity_;
  int32_t size_;
  int32_t appended_;
  UBool overflowed_;

CheckedArrayByteSink() = delete;
  CheckedArrayByteSink(const CheckedArrayByteSink &) = delete;
  CheckedArrayByteSink &operator=(const CheckedArrayByteSink &) = delete;
};

/** 
 * Implementation of ByteSink that writes to a "string".
 * The StringClass is usually instantiated with a std::string.
 * @stable ICU 4.2
 */
template<typename StringClass>
class StringByteSink : public ByteSink {
 public:
  /**
   * Constructs a ByteSink that will append bytes to the dest string.
   * @param dest pointer to string object to append to
   * @stable ICU 4.2
   */
  StringByteSink(StringClass* dest) : dest_(dest) { }
  /**
   * Constructs a ByteSink that reserves append capacity and will append bytes to the dest string.
   * 
   * @param dest pointer to string object to append to
   * @param initialAppendCapacity capacity beyond dest->length() to be reserve()d
   * @stable ICU 60
   */
  StringByteSink(StringClass* dest, int32_t initialAppendCapacity) : dest_(dest) {
    if (initialAppendCapacity > 0 &&
        (uint32_t)initialAppendCapacity > (dest->capacity() - dest->length())) {
      dest->reserve(dest->length() + initialAppendCapacity);
    }
  }
  /**
   * Append "bytes[0,n-1]" to this.
   * @param data the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* data, int32_t n) override { dest_->append(data, n); }
 private:
  StringClass* dest_;

StringByteSink() = delete;
  StringByteSink(const StringByteSink &) = delete;
  StringByteSink &operator=(const StringByteSink &) = delete;
};

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif  // __BYTESTREAM_H__

Back