mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 21:29:28 +00:00
str() mirrors the same method in std::ostringstream. str() flushes the buffered stream contents to string and returns a reference to the string. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55370 91177308-0d34-0410-b5e6-96231b3b80d8
252 lines
7.6 KiB
C++
252 lines
7.6 KiB
C++
//===--- raw_ostream.h - Raw output stream --------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the raw_ostream class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SUPPORT_RAW_OSTREAM_H
|
|
#define LLVM_SUPPORT_RAW_OSTREAM_H
|
|
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include <cassert>
|
|
#include <cstring>
|
|
#include <string>
|
|
#include <iosfwd>
|
|
|
|
namespace llvm {
|
|
class format_object_base;
|
|
template <typename T>
|
|
class SmallVectorImpl;
|
|
|
|
/// raw_ostream - This class implements an extremely fast bulk output stream
|
|
/// that can *only* output to a stream. It does not support seeking, reopening,
|
|
/// rewinding, line buffered disciplines etc. It is a simple buffer that outputs
|
|
/// a chunk at a time.
|
|
class raw_ostream {
|
|
protected:
|
|
char *OutBufStart, *OutBufEnd, *OutBufCur;
|
|
public:
|
|
raw_ostream() {
|
|
// Start out ready to flush.
|
|
OutBufStart = OutBufEnd = OutBufCur = 0;
|
|
}
|
|
virtual ~raw_ostream() {}
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// Configuration Interface
|
|
//===--------------------------------------------------------------------===//
|
|
|
|
/// SetBufferSize - Set the internal buffer size to the specified amount
|
|
/// instead of the default.
|
|
void SetBufferSize(unsigned Size) {
|
|
assert(Size >= 64 &&
|
|
"Buffer size must be somewhat large for invariants to hold");
|
|
flush();
|
|
|
|
delete [] OutBufStart;
|
|
OutBufStart = new char[Size];
|
|
OutBufEnd = OutBufStart+Size;
|
|
OutBufCur = OutBufStart;
|
|
}
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// Data Output Interface
|
|
//===--------------------------------------------------------------------===//
|
|
|
|
void flush() {
|
|
if (OutBufCur != OutBufStart)
|
|
flush_impl();
|
|
}
|
|
|
|
raw_ostream &operator<<(char C) {
|
|
if (OutBufCur >= OutBufEnd)
|
|
flush_impl();
|
|
*OutBufCur++ = C;
|
|
return *this;
|
|
}
|
|
|
|
raw_ostream &operator<<(unsigned char C) {
|
|
if (OutBufCur >= OutBufEnd)
|
|
flush_impl();
|
|
*OutBufCur++ = C;
|
|
return *this;
|
|
}
|
|
|
|
raw_ostream &operator<<(signed char C) {
|
|
if (OutBufCur >= OutBufEnd)
|
|
flush_impl();
|
|
*OutBufCur++ = C;
|
|
return *this;
|
|
}
|
|
|
|
raw_ostream &operator<<(const char *Str) {
|
|
return write(Str, strlen(Str));
|
|
}
|
|
|
|
raw_ostream &operator<<(const std::string& Str) {
|
|
return write(Str.data(), Str.length());
|
|
}
|
|
|
|
raw_ostream &operator<<(unsigned long N);
|
|
raw_ostream &operator<<(long N);
|
|
raw_ostream &operator<<(unsigned long long N);
|
|
raw_ostream &operator<<(long long N);
|
|
raw_ostream &operator<<(const void *P);
|
|
raw_ostream &operator<<(unsigned int N) {
|
|
return this->operator<<(static_cast<unsigned long>(N));
|
|
}
|
|
|
|
raw_ostream &operator<<(int N) {
|
|
return this->operator<<(static_cast<long>(N));
|
|
}
|
|
|
|
raw_ostream &operator<<(double N) {
|
|
return this->operator<<(ftostr(N));
|
|
}
|
|
|
|
raw_ostream &write(const char *Ptr, unsigned Size);
|
|
|
|
// Formatted output, see the format() function in Support/Format.h.
|
|
raw_ostream &operator<<(const format_object_base &Fmt);
|
|
|
|
//===--------------------------------------------------------------------===//
|
|
// Subclass Interface
|
|
//===--------------------------------------------------------------------===//
|
|
|
|
protected:
|
|
|
|
/// flush_impl - The is the piece of the class that is implemented by
|
|
/// subclasses. This outputs the currently buffered data and resets the
|
|
/// buffer to empty.
|
|
virtual void flush_impl() = 0;
|
|
|
|
/// HandleFlush - A stream's implementation of flush should call this after
|
|
/// emitting the bytes to the data sink.
|
|
void HandleFlush() {
|
|
if (OutBufStart == 0)
|
|
SetBufferSize(4096);
|
|
OutBufCur = OutBufStart;
|
|
}
|
|
private:
|
|
// An out of line virtual method to provide a home for the class vtable.
|
|
virtual void handle();
|
|
};
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// File Output Streams
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// raw_fd_ostream - A raw_ostream that writes to a file descriptor.
|
|
///
|
|
class raw_fd_ostream : public raw_ostream {
|
|
int FD;
|
|
bool ShouldClose;
|
|
public:
|
|
/// raw_fd_ostream - Open the specified file for writing. If an error occurs,
|
|
/// information about the error is put into ErrorInfo, and the stream should
|
|
/// be immediately destroyed.
|
|
raw_fd_ostream(const char *Filename, std::string &ErrorInfo);
|
|
|
|
/// raw_fd_ostream ctor - FD is the file descriptor that this writes to. If
|
|
/// ShouldClose is true, this closes the file when
|
|
raw_fd_ostream(int fd, bool shouldClose) : FD(fd), ShouldClose(shouldClose) {}
|
|
|
|
~raw_fd_ostream();
|
|
|
|
/// flush_impl - The is the piece of the class that is implemented by
|
|
/// subclasses. This outputs the currently buffered data and resets the
|
|
/// buffer to empty.
|
|
virtual void flush_impl();
|
|
};
|
|
|
|
/// raw_stdout_ostream - This is a stream that always prints to stdout.
|
|
///
|
|
class raw_stdout_ostream : public raw_fd_ostream {
|
|
// An out of line virtual method to provide a home for the class vtable.
|
|
virtual void handle();
|
|
public:
|
|
raw_stdout_ostream();
|
|
};
|
|
|
|
/// raw_stderr_ostream - This is a stream that always prints to stderr.
|
|
///
|
|
class raw_stderr_ostream : public raw_fd_ostream {
|
|
// An out of line virtual method to provide a home for the class vtable.
|
|
virtual void handle();
|
|
public:
|
|
raw_stderr_ostream();
|
|
};
|
|
|
|
/// outs() - This returns a reference to a raw_ostream for standard output.
|
|
/// Use it like: outs() << "foo" << "bar";
|
|
raw_ostream &outs();
|
|
|
|
/// errs() - This returns a reference to a raw_ostream for standard error.
|
|
/// Use it like: errs() << "foo" << "bar";
|
|
raw_ostream &errs();
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Output Stream Adaptors
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// raw_os_ostream - A raw_ostream that writes to an std::ostream. This is a
|
|
/// simple adaptor class.
|
|
class raw_os_ostream : public raw_ostream {
|
|
std::ostream &OS;
|
|
public:
|
|
raw_os_ostream(std::ostream &O) : OS(O) {}
|
|
~raw_os_ostream();
|
|
|
|
/// flush_impl - The is the piece of the class that is implemented by
|
|
/// subclasses. This outputs the currently buffered data and resets the
|
|
/// buffer to empty.
|
|
virtual void flush_impl();
|
|
};
|
|
|
|
/// raw_string_ostream - A raw_ostream that writes to an std::string. This is a
|
|
/// simple adaptor class.
|
|
class raw_string_ostream : public raw_ostream {
|
|
std::string &OS;
|
|
public:
|
|
raw_string_ostream(std::string &O) : OS(O) {}
|
|
~raw_string_ostream();
|
|
|
|
/// str - Flushes the stream contents to the target string and returns
|
|
/// the strings reference.
|
|
std::string& str() {
|
|
flush();
|
|
return OS;
|
|
}
|
|
|
|
/// flush_impl - The is the piece of the class that is implemented by
|
|
/// subclasses. This outputs the currently buffered data and resets the
|
|
/// buffer to empty.
|
|
virtual void flush_impl();
|
|
};
|
|
|
|
/// raw_svector_ostream - A raw_ostream that writes to an SmallVector or
|
|
/// SmallString. This is a simple adaptor class.
|
|
class raw_svector_ostream : public raw_ostream {
|
|
SmallVectorImpl<char> &OS;
|
|
public:
|
|
raw_svector_ostream(SmallVectorImpl<char> &O) : OS(O) {}
|
|
~raw_svector_ostream();
|
|
|
|
/// flush_impl - The is the piece of the class that is implemented by
|
|
/// subclasses. This outputs the currently buffered data and resets the
|
|
/// buffer to empty.
|
|
virtual void flush_impl();
|
|
};
|
|
|
|
} // end llvm namespace
|
|
|
|
#endif
|