forked from OSchip/llvm-project
561 lines
20 KiB
C++
561 lines
20 KiB
C++
//===-- StringPrinter.cpp -------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "lldb/DataFormatters/StringPrinter.h"
|
|
|
|
#include "lldb/Core/Debugger.h"
|
|
#include "lldb/Core/ValueObject.h"
|
|
#include "lldb/Target/Language.h"
|
|
#include "lldb/Target/Process.h"
|
|
#include "lldb/Target/Target.h"
|
|
#include "lldb/Utility/Status.h"
|
|
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Support/ConvertUTF.h"
|
|
|
|
#include <cctype>
|
|
#include <locale>
|
|
#include <memory>
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
using namespace lldb_private::formatters;
|
|
using GetPrintableElementType = StringPrinter::GetPrintableElementType;
|
|
using StringElementType = StringPrinter::StringElementType;
|
|
|
|
/// DecodedCharBuffer stores the decoded contents of a single character. It
|
|
/// avoids managing memory on the heap by copying decoded bytes into an in-line
|
|
/// buffer.
|
|
class DecodedCharBuffer {
|
|
public:
|
|
DecodedCharBuffer(std::nullptr_t) {}
|
|
|
|
DecodedCharBuffer(const uint8_t *bytes, size_t size) : m_size(size) {
|
|
if (size > MaxLength)
|
|
llvm_unreachable("unsupported length");
|
|
memcpy(m_data, bytes, size);
|
|
}
|
|
|
|
DecodedCharBuffer(const char *bytes, size_t size)
|
|
: DecodedCharBuffer(reinterpret_cast<const uint8_t *>(bytes), size) {}
|
|
|
|
const uint8_t *GetBytes() const { return m_data; }
|
|
|
|
size_t GetSize() const { return m_size; }
|
|
|
|
private:
|
|
static constexpr unsigned MaxLength = 16;
|
|
|
|
size_t m_size = 0;
|
|
uint8_t m_data[MaxLength] = {0};
|
|
};
|
|
|
|
using EscapingHelper =
|
|
std::function<DecodedCharBuffer(uint8_t *, uint8_t *, uint8_t *&)>;
|
|
|
|
// we define this for all values of type but only implement it for those we
|
|
// care about that's good because we get linker errors for any unsupported type
|
|
template <StringElementType type>
|
|
static DecodedCharBuffer
|
|
GetPrintableImpl(uint8_t *buffer, uint8_t *buffer_end, uint8_t *&next,
|
|
StringPrinter::EscapeStyle escape_style);
|
|
|
|
// Mimic isprint() for Unicode codepoints.
|
|
static bool isprint32(char32_t codepoint) {
|
|
if (codepoint <= 0x1F || codepoint == 0x7F) // C0
|
|
{
|
|
return false;
|
|
}
|
|
if (codepoint >= 0x80 && codepoint <= 0x9F) // C1
|
|
{
|
|
return false;
|
|
}
|
|
if (codepoint == 0x2028 || codepoint == 0x2029) // line/paragraph separators
|
|
{
|
|
return false;
|
|
}
|
|
if (codepoint == 0x200E || codepoint == 0x200F ||
|
|
(codepoint >= 0x202A &&
|
|
codepoint <= 0x202E)) // bidirectional text control
|
|
{
|
|
return false;
|
|
}
|
|
if (codepoint >= 0xFFF9 &&
|
|
codepoint <= 0xFFFF) // interlinears and generally specials
|
|
{
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
DecodedCharBuffer attemptASCIIEscape(llvm::UTF32 c,
|
|
StringPrinter::EscapeStyle escape_style) {
|
|
const bool is_swift_escape_style =
|
|
escape_style == StringPrinter::EscapeStyle::Swift;
|
|
switch (c) {
|
|
case 0:
|
|
return {"\\0", 2};
|
|
case '\a':
|
|
return {"\\a", 2};
|
|
case '\b':
|
|
if (is_swift_escape_style)
|
|
return nullptr;
|
|
return {"\\b", 2};
|
|
case '\f':
|
|
if (is_swift_escape_style)
|
|
return nullptr;
|
|
return {"\\f", 2};
|
|
case '\n':
|
|
return {"\\n", 2};
|
|
case '\r':
|
|
return {"\\r", 2};
|
|
case '\t':
|
|
return {"\\t", 2};
|
|
case '\v':
|
|
if (is_swift_escape_style)
|
|
return nullptr;
|
|
return {"\\v", 2};
|
|
case '\"':
|
|
return {"\\\"", 2};
|
|
case '\'':
|
|
if (is_swift_escape_style)
|
|
return {"\\'", 2};
|
|
return nullptr;
|
|
case '\\':
|
|
return {"\\\\", 2};
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
template <>
|
|
DecodedCharBuffer GetPrintableImpl<StringElementType::ASCII>(
|
|
uint8_t *buffer, uint8_t *buffer_end, uint8_t *&next,
|
|
StringPrinter::EscapeStyle escape_style) {
|
|
// The ASCII helper always advances 1 byte at a time.
|
|
next = buffer + 1;
|
|
|
|
DecodedCharBuffer retval = attemptASCIIEscape(*buffer, escape_style);
|
|
if (retval.GetSize())
|
|
return retval;
|
|
|
|
// Use llvm's locale-independent isPrint(char), instead of the libc
|
|
// implementation which may give different results on different platforms.
|
|
if (llvm::isPrint(*buffer))
|
|
return {buffer, 1};
|
|
|
|
unsigned escaped_len;
|
|
constexpr unsigned max_buffer_size = 7;
|
|
uint8_t data[max_buffer_size];
|
|
switch (escape_style) {
|
|
case StringPrinter::EscapeStyle::CXX:
|
|
// Prints 4 characters, then a \0 terminator.
|
|
escaped_len = sprintf((char *)data, "\\x%02x", *buffer);
|
|
break;
|
|
case StringPrinter::EscapeStyle::Swift:
|
|
// Prints up to 6 characters, then a \0 terminator.
|
|
escaped_len = sprintf((char *)data, "\\u{%x}", *buffer);
|
|
break;
|
|
}
|
|
lldbassert(escaped_len > 0 && "unknown string escape style");
|
|
return {data, escaped_len};
|
|
}
|
|
|
|
template <>
|
|
DecodedCharBuffer GetPrintableImpl<StringElementType::UTF8>(
|
|
uint8_t *buffer, uint8_t *buffer_end, uint8_t *&next,
|
|
StringPrinter::EscapeStyle escape_style) {
|
|
// If the utf8 encoded length is invalid (i.e., not in the closed interval
|
|
// [1;4]), or if there aren't enough bytes to print, or if the subsequence
|
|
// isn't valid utf8, fall back to printing an ASCII-escaped subsequence.
|
|
if (!llvm::isLegalUTF8Sequence(buffer, buffer_end))
|
|
return GetPrintableImpl<StringElementType::ASCII>(buffer, buffer_end, next,
|
|
escape_style);
|
|
|
|
// Convert the valid utf8 sequence to a utf32 codepoint. This cannot fail.
|
|
llvm::UTF32 codepoint = 0;
|
|
const llvm::UTF8 *buffer_for_conversion = buffer;
|
|
llvm::ConversionResult result = llvm::convertUTF8Sequence(
|
|
&buffer_for_conversion, buffer_end, &codepoint, llvm::strictConversion);
|
|
assert(result == llvm::conversionOK &&
|
|
"Failed to convert legal utf8 sequence");
|
|
(void)result;
|
|
|
|
// The UTF8 helper always advances by the utf8 encoded length.
|
|
const unsigned utf8_encoded_len = buffer_for_conversion - buffer;
|
|
next = buffer + utf8_encoded_len;
|
|
|
|
DecodedCharBuffer retval = attemptASCIIEscape(codepoint, escape_style);
|
|
if (retval.GetSize())
|
|
return retval;
|
|
if (isprint32(codepoint))
|
|
return {buffer, utf8_encoded_len};
|
|
|
|
unsigned escaped_len;
|
|
constexpr unsigned max_buffer_size = 13;
|
|
uint8_t data[max_buffer_size];
|
|
switch (escape_style) {
|
|
case StringPrinter::EscapeStyle::CXX:
|
|
// Prints 10 characters, then a \0 terminator.
|
|
escaped_len = sprintf((char *)data, "\\U%08x", codepoint);
|
|
break;
|
|
case StringPrinter::EscapeStyle::Swift:
|
|
// Prints up to 12 characters, then a \0 terminator.
|
|
escaped_len = sprintf((char *)data, "\\u{%x}", codepoint);
|
|
break;
|
|
}
|
|
lldbassert(escaped_len > 0 && "unknown string escape style");
|
|
return {data, escaped_len};
|
|
}
|
|
|
|
// Given a sequence of bytes, this function returns: a sequence of bytes to
|
|
// actually print out + a length the following unscanned position of the buffer
|
|
// is in next
|
|
static DecodedCharBuffer GetPrintable(StringElementType type, uint8_t *buffer,
|
|
uint8_t *buffer_end, uint8_t *&next,
|
|
StringPrinter::EscapeStyle escape_style) {
|
|
if (!buffer || buffer >= buffer_end)
|
|
return {nullptr};
|
|
|
|
switch (type) {
|
|
case StringElementType::ASCII:
|
|
return GetPrintableImpl<StringElementType::ASCII>(buffer, buffer_end, next,
|
|
escape_style);
|
|
case StringElementType::UTF8:
|
|
return GetPrintableImpl<StringElementType::UTF8>(buffer, buffer_end, next,
|
|
escape_style);
|
|
default:
|
|
return {nullptr};
|
|
}
|
|
}
|
|
|
|
static EscapingHelper
|
|
GetDefaultEscapingHelper(GetPrintableElementType elem_type,
|
|
StringPrinter::EscapeStyle escape_style) {
|
|
switch (elem_type) {
|
|
case GetPrintableElementType::UTF8:
|
|
case GetPrintableElementType::ASCII:
|
|
return [escape_style, elem_type](uint8_t *buffer, uint8_t *buffer_end,
|
|
uint8_t *&next) -> DecodedCharBuffer {
|
|
return GetPrintable(elem_type == GetPrintableElementType::UTF8
|
|
? StringElementType::UTF8
|
|
: StringElementType::ASCII,
|
|
buffer, buffer_end, next, escape_style);
|
|
};
|
|
}
|
|
llvm_unreachable("bad element type");
|
|
}
|
|
|
|
/// Read a string encoded in accordance with \tparam SourceDataType from a
|
|
/// host-side LLDB buffer, then pretty-print it to a stream using \p style.
|
|
template <typename SourceDataType>
|
|
static bool DumpEncodedBufferToStream(
|
|
GetPrintableElementType style,
|
|
llvm::ConversionResult (*ConvertFunction)(const SourceDataType **,
|
|
const SourceDataType *,
|
|
llvm::UTF8 **, llvm::UTF8 *,
|
|
llvm::ConversionFlags),
|
|
const StringPrinter::ReadBufferAndDumpToStreamOptions &dump_options) {
|
|
assert(dump_options.GetStream() && "need a Stream to print the string to");
|
|
Stream &stream(*dump_options.GetStream());
|
|
if (dump_options.GetPrefixToken() != nullptr)
|
|
stream.Printf("%s", dump_options.GetPrefixToken());
|
|
if (dump_options.GetQuote() != 0)
|
|
stream.Printf("%c", dump_options.GetQuote());
|
|
auto data(dump_options.GetData());
|
|
auto source_size(dump_options.GetSourceSize());
|
|
if (data.GetByteSize() && data.GetDataStart() && data.GetDataEnd()) {
|
|
const int bufferSPSize = data.GetByteSize();
|
|
if (dump_options.GetSourceSize() == 0) {
|
|
const int origin_encoding = 8 * sizeof(SourceDataType);
|
|
source_size = bufferSPSize / (origin_encoding / 4);
|
|
}
|
|
|
|
const SourceDataType *data_ptr =
|
|
(const SourceDataType *)data.GetDataStart();
|
|
const SourceDataType *data_end_ptr = data_ptr + source_size;
|
|
|
|
const bool zero_is_terminator = dump_options.GetBinaryZeroIsTerminator();
|
|
|
|
if (zero_is_terminator) {
|
|
while (data_ptr < data_end_ptr) {
|
|
if (!*data_ptr) {
|
|
data_end_ptr = data_ptr;
|
|
break;
|
|
}
|
|
data_ptr++;
|
|
}
|
|
|
|
data_ptr = (const SourceDataType *)data.GetDataStart();
|
|
}
|
|
|
|
lldb::WritableDataBufferSP utf8_data_buffer_sp;
|
|
llvm::UTF8 *utf8_data_ptr = nullptr;
|
|
llvm::UTF8 *utf8_data_end_ptr = nullptr;
|
|
|
|
if (ConvertFunction) {
|
|
utf8_data_buffer_sp =
|
|
std::make_shared<DataBufferHeap>(4 * bufferSPSize, 0);
|
|
utf8_data_ptr = (llvm::UTF8 *)utf8_data_buffer_sp->GetBytes();
|
|
utf8_data_end_ptr = utf8_data_ptr + utf8_data_buffer_sp->GetByteSize();
|
|
ConvertFunction(&data_ptr, data_end_ptr, &utf8_data_ptr,
|
|
utf8_data_end_ptr, llvm::lenientConversion);
|
|
if (!zero_is_terminator)
|
|
utf8_data_end_ptr = utf8_data_ptr;
|
|
// needed because the ConvertFunction will change the value of the
|
|
// data_ptr.
|
|
utf8_data_ptr =
|
|
(llvm::UTF8 *)utf8_data_buffer_sp->GetBytes();
|
|
} else {
|
|
// just copy the pointers - the cast is necessary to make the compiler
|
|
// happy but this should only happen if we are reading UTF8 data
|
|
utf8_data_ptr = const_cast<llvm::UTF8 *>(
|
|
reinterpret_cast<const llvm::UTF8 *>(data_ptr));
|
|
utf8_data_end_ptr = const_cast<llvm::UTF8 *>(
|
|
reinterpret_cast<const llvm::UTF8 *>(data_end_ptr));
|
|
}
|
|
|
|
const bool escape_non_printables = dump_options.GetEscapeNonPrintables();
|
|
EscapingHelper escaping_callback;
|
|
if (escape_non_printables)
|
|
escaping_callback =
|
|
GetDefaultEscapingHelper(style, dump_options.GetEscapeStyle());
|
|
|
|
// since we tend to accept partial data (and even partially malformed data)
|
|
// we might end up with no NULL terminator before the end_ptr hence we need
|
|
// to take a slower route and ensure we stay within boundaries
|
|
for (; utf8_data_ptr < utf8_data_end_ptr;) {
|
|
if (zero_is_terminator && !*utf8_data_ptr)
|
|
break;
|
|
|
|
if (escape_non_printables) {
|
|
uint8_t *next_data = nullptr;
|
|
auto printable =
|
|
escaping_callback(utf8_data_ptr, utf8_data_end_ptr, next_data);
|
|
auto printable_bytes = printable.GetBytes();
|
|
auto printable_size = printable.GetSize();
|
|
|
|
// We failed to figure out how to print this string.
|
|
if (!printable_bytes || !next_data)
|
|
return false;
|
|
|
|
for (unsigned c = 0; c < printable_size; c++)
|
|
stream.Printf("%c", *(printable_bytes + c));
|
|
utf8_data_ptr = (uint8_t *)next_data;
|
|
} else {
|
|
stream.Printf("%c", *utf8_data_ptr);
|
|
utf8_data_ptr++;
|
|
}
|
|
}
|
|
}
|
|
if (dump_options.GetQuote() != 0)
|
|
stream.Printf("%c", dump_options.GetQuote());
|
|
if (dump_options.GetSuffixToken() != nullptr)
|
|
stream.Printf("%s", dump_options.GetSuffixToken());
|
|
if (dump_options.GetIsTruncated())
|
|
stream.Printf("...");
|
|
return true;
|
|
}
|
|
|
|
lldb_private::formatters::StringPrinter::ReadStringAndDumpToStreamOptions::
|
|
ReadStringAndDumpToStreamOptions(ValueObject &valobj)
|
|
: ReadStringAndDumpToStreamOptions() {
|
|
SetEscapeNonPrintables(
|
|
valobj.GetTargetSP()->GetDebugger().GetEscapeNonPrintables());
|
|
}
|
|
|
|
lldb_private::formatters::StringPrinter::ReadBufferAndDumpToStreamOptions::
|
|
ReadBufferAndDumpToStreamOptions(ValueObject &valobj)
|
|
: ReadBufferAndDumpToStreamOptions() {
|
|
SetEscapeNonPrintables(
|
|
valobj.GetTargetSP()->GetDebugger().GetEscapeNonPrintables());
|
|
}
|
|
|
|
lldb_private::formatters::StringPrinter::ReadBufferAndDumpToStreamOptions::
|
|
ReadBufferAndDumpToStreamOptions(
|
|
const ReadStringAndDumpToStreamOptions &options)
|
|
: ReadBufferAndDumpToStreamOptions() {
|
|
SetStream(options.GetStream());
|
|
SetPrefixToken(options.GetPrefixToken());
|
|
SetSuffixToken(options.GetSuffixToken());
|
|
SetQuote(options.GetQuote());
|
|
SetEscapeNonPrintables(options.GetEscapeNonPrintables());
|
|
SetBinaryZeroIsTerminator(options.GetBinaryZeroIsTerminator());
|
|
SetEscapeStyle(options.GetEscapeStyle());
|
|
}
|
|
|
|
namespace lldb_private {
|
|
|
|
namespace formatters {
|
|
|
|
template <typename SourceDataType>
|
|
static bool ReadEncodedBufferAndDumpToStream(
|
|
StringElementType elem_type,
|
|
const StringPrinter::ReadStringAndDumpToStreamOptions &options,
|
|
llvm::ConversionResult (*ConvertFunction)(const SourceDataType **,
|
|
const SourceDataType *,
|
|
llvm::UTF8 **, llvm::UTF8 *,
|
|
llvm::ConversionFlags)) {
|
|
assert(options.GetStream() && "need a Stream to print the string to");
|
|
if (!options.GetStream())
|
|
return false;
|
|
|
|
if (options.GetLocation() == 0 ||
|
|
options.GetLocation() == LLDB_INVALID_ADDRESS)
|
|
return false;
|
|
|
|
lldb::TargetSP target_sp = options.GetTargetSP();
|
|
if (!target_sp)
|
|
return false;
|
|
|
|
constexpr int type_width = sizeof(SourceDataType);
|
|
constexpr int origin_encoding = 8 * type_width;
|
|
if (origin_encoding != 8 && origin_encoding != 16 && origin_encoding != 32)
|
|
return false;
|
|
// If not UTF8 or ASCII, conversion to UTF8 is necessary.
|
|
if (origin_encoding != 8 && !ConvertFunction)
|
|
return false;
|
|
|
|
bool needs_zero_terminator = options.GetNeedsZeroTermination();
|
|
|
|
bool is_truncated = false;
|
|
const auto max_size = target_sp->GetMaximumSizeOfStringSummary();
|
|
|
|
uint32_t sourceSize;
|
|
if (elem_type == StringElementType::ASCII && !options.GetSourceSize()) {
|
|
// FIXME: The NSString formatter sets HasSourceSize(true) when the size is
|
|
// actually unknown, as well as SetBinaryZeroIsTerminator(false). IIUC the
|
|
// C++ formatter also sets SetBinaryZeroIsTerminator(false) when it doesn't
|
|
// mean to. I don't see how this makes sense: we should fix the formatters.
|
|
//
|
|
// Until then, the behavior that's expected for ASCII strings with unknown
|
|
// lengths is to read up to the max size and then null-terminate. Do that.
|
|
sourceSize = max_size;
|
|
needs_zero_terminator = true;
|
|
} else if (options.HasSourceSize()) {
|
|
sourceSize = options.GetSourceSize();
|
|
if (!options.GetIgnoreMaxLength()) {
|
|
if (sourceSize > max_size) {
|
|
sourceSize = max_size;
|
|
is_truncated = true;
|
|
}
|
|
}
|
|
} else {
|
|
sourceSize = max_size;
|
|
needs_zero_terminator = true;
|
|
}
|
|
|
|
const int bufferSPSize = sourceSize * type_width;
|
|
lldb::WritableDataBufferSP buffer_sp(new DataBufferHeap(bufferSPSize, 0));
|
|
|
|
// Check if we got bytes. We never get any bytes if we have an empty
|
|
// string, but we still continue so that we end up actually printing
|
|
// an empty string ("").
|
|
if (sourceSize != 0 && !buffer_sp->GetBytes())
|
|
return false;
|
|
|
|
Status error;
|
|
char *buffer = reinterpret_cast<char *>(buffer_sp->GetBytes());
|
|
|
|
if (elem_type == StringElementType::ASCII)
|
|
target_sp->ReadCStringFromMemory(options.GetLocation(), buffer,
|
|
bufferSPSize, error);
|
|
else if (needs_zero_terminator)
|
|
target_sp->ReadStringFromMemory(options.GetLocation(), buffer,
|
|
bufferSPSize, error, type_width);
|
|
else
|
|
target_sp->ReadMemory(options.GetLocation(), buffer, bufferSPSize, error);
|
|
if (error.Fail()) {
|
|
options.GetStream()->Printf("unable to read data");
|
|
return true;
|
|
}
|
|
|
|
StringPrinter::ReadBufferAndDumpToStreamOptions dump_options(options);
|
|
dump_options.SetData(
|
|
DataExtractor(buffer_sp, target_sp->GetArchitecture().GetByteOrder(),
|
|
target_sp->GetArchitecture().GetAddressByteSize()));
|
|
dump_options.SetSourceSize(sourceSize);
|
|
dump_options.SetIsTruncated(is_truncated);
|
|
dump_options.SetNeedsZeroTermination(needs_zero_terminator);
|
|
if (needs_zero_terminator)
|
|
dump_options.SetBinaryZeroIsTerminator(true);
|
|
|
|
GetPrintableElementType print_style = (elem_type == StringElementType::ASCII)
|
|
? GetPrintableElementType::ASCII
|
|
: GetPrintableElementType::UTF8;
|
|
return DumpEncodedBufferToStream(print_style, ConvertFunction, dump_options);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadStringAndDumpToStream<StringElementType::UTF8>(
|
|
const ReadStringAndDumpToStreamOptions &options) {
|
|
return ReadEncodedBufferAndDumpToStream<llvm::UTF8>(StringElementType::UTF8,
|
|
options, nullptr);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadStringAndDumpToStream<StringElementType::UTF16>(
|
|
const ReadStringAndDumpToStreamOptions &options) {
|
|
return ReadEncodedBufferAndDumpToStream<llvm::UTF16>(
|
|
StringElementType::UTF16, options, llvm::ConvertUTF16toUTF8);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadStringAndDumpToStream<StringElementType::UTF32>(
|
|
const ReadStringAndDumpToStreamOptions &options) {
|
|
return ReadEncodedBufferAndDumpToStream<llvm::UTF32>(
|
|
StringElementType::UTF32, options, llvm::ConvertUTF32toUTF8);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadStringAndDumpToStream<StringElementType::ASCII>(
|
|
const ReadStringAndDumpToStreamOptions &options) {
|
|
return ReadEncodedBufferAndDumpToStream<char>(StringElementType::ASCII,
|
|
options, nullptr);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadBufferAndDumpToStream<StringElementType::UTF8>(
|
|
const ReadBufferAndDumpToStreamOptions &options) {
|
|
return DumpEncodedBufferToStream<llvm::UTF8>(GetPrintableElementType::UTF8,
|
|
nullptr, options);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadBufferAndDumpToStream<StringElementType::UTF16>(
|
|
const ReadBufferAndDumpToStreamOptions &options) {
|
|
return DumpEncodedBufferToStream(GetPrintableElementType::UTF8,
|
|
llvm::ConvertUTF16toUTF8, options);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadBufferAndDumpToStream<StringElementType::UTF32>(
|
|
const ReadBufferAndDumpToStreamOptions &options) {
|
|
return DumpEncodedBufferToStream(GetPrintableElementType::UTF8,
|
|
llvm::ConvertUTF32toUTF8, options);
|
|
}
|
|
|
|
template <>
|
|
bool StringPrinter::ReadBufferAndDumpToStream<StringElementType::ASCII>(
|
|
const ReadBufferAndDumpToStreamOptions &options) {
|
|
// Treat ASCII the same as UTF8.
|
|
//
|
|
// FIXME: This is probably not the right thing to do (well, it's debatable).
|
|
// If an ASCII-encoded string happens to contain a sequence of invalid bytes
|
|
// that forms a valid UTF8 character, we'll print out that character. This is
|
|
// good if you're playing fast and loose with encodings (probably good for
|
|
// std::string users), but maybe not so good if you care about your string
|
|
// formatter respecting the semantics of your selected string encoding. In
|
|
// the latter case you'd want to see the character byte sequence ('\x..'), not
|
|
// the UTF8 character itself.
|
|
return ReadBufferAndDumpToStream<StringElementType::UTF8>(options);
|
|
}
|
|
|
|
} // namespace formatters
|
|
|
|
} // namespace lldb_private
|