1 //===-- llvm/Support/FormattedStream.cpp - Formatted streams ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the implementation of formatted_raw_ostream.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/FormattedStream.h"
17 /// ComputeColumn - Examine the current output and figure out which
18 /// column we end up in after output.
20 void formatted_raw_ostream::ComputeColumn(const char *Ptr, unsigned Size) {
21 // Keep track of the current column by scanning the string for
24 for (const char *epos = Ptr + Size; Ptr != epos; ++Ptr) {
26 if (*Ptr == '\n' || *Ptr == '\r')
28 else if (*Ptr == '\t')
29 Column += (8 - (Column & 0x7)) & 0x7;
33 /// PadToColumn - Align the output to some column number.
35 /// \param NewCol - The column to move to.
36 /// \param MinPad - The minimum space to give after the most recent
37 /// I/O, even if the current column + minpad > newcol.
39 void formatted_raw_ostream::PadToColumn(unsigned NewCol, unsigned MinPad) {
42 // Output spaces until we reach the desired column.
43 unsigned num = NewCol - Column;
44 if (NewCol < Column || num < MinPad)
47 // TODO: Write a whole string at a time.
52 /// fouts() - This returns a reference to a formatted_raw_ostream for
53 /// standard output. Use it like: fouts() << "foo" << "bar";
54 formatted_raw_ostream &llvm::fouts() {
55 static formatted_raw_ostream S(outs());
59 /// ferrs() - This returns a reference to a formatted_raw_ostream for
60 /// standard error. Use it like: ferrs() << "foo" << "bar";
61 formatted_raw_ostream &llvm::ferrs() {
62 static formatted_raw_ostream S(errs());