Fixed two issues in the type encoding parser:
- A correctness issue: with assertions disabled, ReadQuotedString would misbehave; and - A performance issue: BuildType used a long chain of if()s; I changed that to two switch statements. That also makes the code much nicer to step through when debugging it. llvm-svn: 221651
This commit is contained in:
Sean Callanan
parent
0becd57044
commit
f37ccc181d
|
|
@ -43,7 +43,8 @@ AppleObjCTypeEncodingParser::ReadQuotedString(lldb_utility::StringLexer& type)
|
|||
StreamString buffer;
|
||||
while (type.HasAtLeast(1) && type.Peek() != '"')
|
||||
buffer.Printf("%c",type.Next());
|
||||
assert(type.Next() == '"');
|
||||
StringLexer::Character next = type.Next();
|
||||
assert (next == '"');
|
||||
return buffer.GetString();
|
||||
}
|
||||
|
||||
|
|
@ -198,7 +199,7 @@ AppleObjCTypeEncodingParser::BuildObjCObjectPointerType (clang::ASTContext &ast_
|
|||
{
|
||||
default:
|
||||
// roll back
|
||||
type.PutBack(name.length() + 1);
|
||||
type.PutBack(name.length() + 2); // undo our consumption of the string and of the quotes
|
||||
name.clear();
|
||||
break;
|
||||
case '}':
|
||||
|
|
@ -258,85 +259,78 @@ AppleObjCTypeEncodingParser::BuildType (clang::ASTContext &ast_ctx, StringLexer&
|
|||
if (!type.HasAtLeast(1))
|
||||
return clang::QualType();
|
||||
|
||||
if (type.NextIf('c'))
|
||||
switch (type.Peek())
|
||||
{
|
||||
default:
|
||||
break;
|
||||
case '{':
|
||||
return BuildStruct(ast_ctx, type, for_expression);
|
||||
case '[':
|
||||
return BuildArray(ast_ctx, type, for_expression);
|
||||
case '(':
|
||||
return BuildUnion(ast_ctx, type, for_expression);
|
||||
case '@':
|
||||
return BuildObjCObjectPointerType(ast_ctx, type, for_expression);
|
||||
}
|
||||
|
||||
switch (type.Next())
|
||||
{
|
||||
default:
|
||||
type.PutBack(1);
|
||||
return clang::QualType();
|
||||
case 'c':
|
||||
return ast_ctx.CharTy;
|
||||
if (type.NextIf('i'))
|
||||
case 'i':
|
||||
return ast_ctx.IntTy;
|
||||
if (type.NextIf('s'))
|
||||
case 's':
|
||||
return ast_ctx.ShortTy;
|
||||
if (type.NextIf('l'))
|
||||
{
|
||||
ClangASTContext *lldb_ctx = ClangASTContext::GetASTContext(&ast_ctx);
|
||||
if (!lldb_ctx)
|
||||
return clang::QualType();
|
||||
return lldb_ctx->GetIntTypeFromBitSize(32, true).GetQualType();
|
||||
}
|
||||
if (type.NextIf('q'))
|
||||
case 'l':
|
||||
return ast_ctx.getIntTypeForBitwidth(32, true);
|
||||
// this used to be done like this:
|
||||
// ClangASTContext *lldb_ctx = ClangASTContext::GetASTContext(&ast_ctx);
|
||||
// if (!lldb_ctx)
|
||||
// return clang::QualType();
|
||||
// return lldb_ctx->GetIntTypeFromBitSize(32, true).GetQualType();
|
||||
// which uses one of the constants if one is available, but we don't think all this work is necessary.
|
||||
case 'q':
|
||||
return ast_ctx.LongLongTy;
|
||||
if (type.NextIf('C'))
|
||||
case 'C':
|
||||
return ast_ctx.UnsignedCharTy;
|
||||
if (type.NextIf('I'))
|
||||
case 'I':
|
||||
return ast_ctx.UnsignedIntTy;
|
||||
if (type.NextIf('S'))
|
||||
case 'S':
|
||||
return ast_ctx.UnsignedShortTy;
|
||||
if (type.NextIf('L'))
|
||||
{
|
||||
ClangASTContext *lldb_ctx = ClangASTContext::GetASTContext(&ast_ctx);
|
||||
if (!lldb_ctx)
|
||||
return clang::QualType();
|
||||
return lldb_ctx->GetIntTypeFromBitSize(32, false).GetQualType();
|
||||
}
|
||||
if (type.NextIf('Q'))
|
||||
case 'L':
|
||||
return ast_ctx.getIntTypeForBitwidth(32, false);
|
||||
// see note for 'l'
|
||||
case 'Q':
|
||||
return ast_ctx.UnsignedLongLongTy;
|
||||
if (type.NextIf('f'))
|
||||
case 'f':
|
||||
return ast_ctx.FloatTy;
|
||||
if (type.NextIf('d'))
|
||||
case 'd':
|
||||
return ast_ctx.DoubleTy;
|
||||
if (type.NextIf('B'))
|
||||
case 'B':
|
||||
return ast_ctx.BoolTy;
|
||||
if (type.NextIf('v'))
|
||||
case 'v':
|
||||
return ast_ctx.VoidTy;
|
||||
if (type.NextIf('*'))
|
||||
case '*':
|
||||
return ast_ctx.getPointerType(ast_ctx.CharTy);
|
||||
if (type.NextIf('#'))
|
||||
case '#':
|
||||
return ast_ctx.getObjCClassType();
|
||||
if (type.NextIf(':'))
|
||||
case ':':
|
||||
return ast_ctx.getObjCSelType();
|
||||
|
||||
if (type.NextIf('b'))
|
||||
{
|
||||
uint32_t size = ReadNumber(type);
|
||||
if (bitfield_bit_size)
|
||||
case 'b':
|
||||
{
|
||||
*bitfield_bit_size = size;
|
||||
return ast_ctx.UnsignedIntTy; // FIXME: the spec is fairly vague here.
|
||||
uint32_t size = ReadNumber(type);
|
||||
if (bitfield_bit_size)
|
||||
{
|
||||
*bitfield_bit_size = size;
|
||||
return ast_ctx.UnsignedIntTy; // FIXME: the spec is fairly vague here.
|
||||
}
|
||||
else
|
||||
return clang::QualType();
|
||||
}
|
||||
else
|
||||
return clang::QualType();
|
||||
}
|
||||
|
||||
if (type.NextIf('r'))
|
||||
{
|
||||
clang::QualType target_type = BuildType(ast_ctx, type, for_expression);
|
||||
if (target_type.isNull())
|
||||
return clang::QualType();
|
||||
else if (target_type == ast_ctx.UnknownAnyTy)
|
||||
return ast_ctx.UnknownAnyTy;
|
||||
else
|
||||
return ast_ctx.getConstType(target_type);
|
||||
}
|
||||
|
||||
if (type.NextIf('^'))
|
||||
{
|
||||
if (!for_expression && type.NextIf('?'))
|
||||
{
|
||||
// if we are not supporting the concept of unknownAny, but what is being created here is an unknownAny*, then
|
||||
// we can just get away with a void*
|
||||
// this is theoretically wrong (in the same sense as 'theoretically nothing exists') but is way better than outright failure
|
||||
// in many practical cases
|
||||
return ast_ctx.VoidPtrTy;
|
||||
}
|
||||
else
|
||||
case 'r':
|
||||
{
|
||||
clang::QualType target_type = BuildType(ast_ctx, type, for_expression);
|
||||
if (target_type.isNull())
|
||||
|
|
@ -344,26 +338,32 @@ AppleObjCTypeEncodingParser::BuildType (clang::ASTContext &ast_ctx, StringLexer&
|
|||
else if (target_type == ast_ctx.UnknownAnyTy)
|
||||
return ast_ctx.UnknownAnyTy;
|
||||
else
|
||||
return ast_ctx.getPointerType(target_type);
|
||||
return ast_ctx.getConstType(target_type);
|
||||
}
|
||||
}
|
||||
|
||||
if (type.NextIf('?'))
|
||||
case '^':
|
||||
{
|
||||
if (!for_expression && type.NextIf('?'))
|
||||
{
|
||||
// if we are not supporting the concept of unknownAny, but what is being created here is an unknownAny*, then
|
||||
// we can just get away with a void*
|
||||
// this is theoretically wrong (in the same sense as 'theoretically nothing exists') but is way better than outright failure
|
||||
// in many practical cases
|
||||
return ast_ctx.VoidPtrTy;
|
||||
}
|
||||
else
|
||||
{
|
||||
clang::QualType target_type = BuildType(ast_ctx, type, for_expression);
|
||||
if (target_type.isNull())
|
||||
return clang::QualType();
|
||||
else if (target_type == ast_ctx.UnknownAnyTy)
|
||||
return ast_ctx.UnknownAnyTy;
|
||||
else
|
||||
return ast_ctx.getPointerType(target_type);
|
||||
}
|
||||
}
|
||||
case '?':
|
||||
return for_expression ? ast_ctx.UnknownAnyTy : clang::QualType();
|
||||
|
||||
if (type.Peek() == '{')
|
||||
return BuildStruct(ast_ctx, type, for_expression);
|
||||
|
||||
if (type.Peek() == '[')
|
||||
return BuildArray(ast_ctx, type, for_expression);
|
||||
|
||||
if (type.Peek() == '(')
|
||||
return BuildUnion(ast_ctx, type, for_expression);
|
||||
|
||||
if (type.Peek() == '@')
|
||||
return BuildObjCObjectPointerType(ast_ctx, type, for_expression);
|
||||
|
||||
return clang::QualType();
|
||||
}
|
||||
}
|
||||
|
||||
ClangASTType
|
||||
|
|
|
|||
Loading…
Reference in New Issue