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raw_ostream::write_escaped: Add a UseHexEscapes argument.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120200 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-11-27 07:59:50 +00:00
parent 590956f24f
commit 10a049e6cf
2 changed files with 16 additions and 7 deletions
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2
include/llvm/Support/raw_ostream.h
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@ -196,7 +196,7 @@ public:
/// write_escaped - Output \arg Str, turning '\\', '\t', '\n', '"', and
/// anything that doesn't satisfy std::isprint into an escape sequence.
raw_ostream &write_escaped(StringRef Str);
raw_ostream &write_escaped(StringRef Str, bool UseHexEscapes = false);
raw_ostream &write(unsigned char C);
raw_ostream &write(const char *Ptr, size_t Size);

21
lib/Support/raw_ostream.cpp
View File

@ -15,6 +15,7 @@
#include "llvm/Support/Format.h"
#include "llvm/System/Program.h"
#include "llvm/System/Process.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
@ -167,7 +168,8 @@ raw_ostream &raw_ostream::write_hex(unsigned long long N) {
return write(CurPtr, EndPtr-CurPtr);
}
raw_ostream &raw_ostream::write_escaped(StringRef Str) {
raw_ostream &raw_ostream::write_escaped(StringRef Str,
bool UseHexEscapes) {
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
unsigned char c = Str[i];
@ -190,11 +192,18 @@ raw_ostream &raw_ostream::write_escaped(StringRef Str) {
break;
}
// Always expand to a 3-character octal escape.
*this << '\\';
*this << char('0' + ((c >> 6) & 7));
*this << char('0' + ((c >> 3) & 7));
*this << char('0' + ((c >> 0) & 7));
// Write out the escaped representation.
if (UseHexEscapes) {
*this << '\\' << 'x';
*this << hexdigit((c >> 4 & 0xF));
*this << hexdigit((c >> 0) & 0xF);
} else {
// Always use a full 3-character octal escape.
*this << '\\';
*this << char('0' + ((c >> 6) & 7));
*this << char('0' + ((c >> 3) & 7));
*this << char('0' + ((c >> 0) & 7));
}
}
}