move StringToOffsetTable out to its own header.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81740 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp
index aee4653..8f8f89a 100644
--- a/utils/TableGen/AsmWriterEmitter.cpp
+++ b/utils/TableGen/AsmWriterEmitter.cpp
@@ -15,68 +15,13 @@
#include "AsmWriterEmitter.h"
#include "CodeGenTarget.h"
#include "Record.h"
+#include "StringToOffsetTable.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
using namespace llvm;
-/// StringToOffsetTable - This class uniques a bunch of nul-terminated strings
-/// and keeps track of their offset in a massive contiguous string allocation.
-/// It can then output this string blob and use indexes into the string to
-/// reference each piece.
-class StringToOffsetTable {
- StringMap<unsigned> StringOffset;
- std::string AggregateString;
-public:
-
- unsigned GetOrAddStringOffset(StringRef Str) {
- unsigned &Entry = StringOffset[Str];
- if (Entry == 0) {
- // Add the string to the aggregate if this is the first time found.
- Entry = AggregateString.size();
- AggregateString.append(Str.begin(), Str.end());
- AggregateString += '\0';
- }
-
- return Entry;
- }
-
- void EmitString(raw_ostream &O) {
- O << " \"";
- unsigned CharsPrinted = 0;
- EscapeString(AggregateString);
- for (unsigned i = 0, e = AggregateString.size(); i != e; ++i) {
- if (CharsPrinted > 70) {
- O << "\"\n \"";
- CharsPrinted = 0;
- }
- O << AggregateString[i];
- ++CharsPrinted;
-
- // Print escape sequences all together.
- if (AggregateString[i] != '\\')
- continue;
-
- assert(i+1 < AggregateString.size() && "Incomplete escape sequence!");
- if (isdigit(AggregateString[i+1])) {
- assert(isdigit(AggregateString[i+2]) &&
- isdigit(AggregateString[i+3]) &&
- "Expected 3 digit octal escape!");
- O << AggregateString[++i];
- O << AggregateString[++i];
- O << AggregateString[++i];
- CharsPrinted += 3;
- } else {
- O << AggregateString[++i];
- ++CharsPrinted;
- }
- }
- O << "\"";
- }
-};
-
static bool isIdentChar(char C) {
return (C >= 'a' && C <= 'z') ||