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());
SetLanguage(options.GetLanguage());
}
bool
StringPrinter::ReadStringAndDumpToStream<StringPrinter::StringElementType::ASCII> (const ReadStringAndDumpToStreamOptions& options)
{
assert(options.GetStream() && "need a Stream to print the string to");
Error my_error;
ProcessSP process_sp(options.GetProcessSP());
if (process_sp.get() == nullptr || options.GetLocation() == 0)
return false;
size_t size;
const auto max_size = process_sp->GetTarget().GetMaximumSizeOfStringSummary();
bool is_truncated = false;
if (options.GetSourceSize() == 0)
size = max_size;
else if (!options.GetIgnoreMaxLength())
{
size = options.GetSourceSize();
if (size > max_size)
{
size = max_size;
is_truncated = true;
}
}
else
size = options.GetSourceSize();
lldb::DataBufferSP buffer_sp(new DataBufferHeap(size,0));
process_sp->ReadCStringFromMemory(options.GetLocation(), (char*)buffer_sp->GetBytes(), size, my_error);
if (my_error.Fail())
return false;
const char* prefix_token = options.GetPrefixToken();
char quote = options.GetQuote();
if (prefix_token != 0)
options.GetStream()->Printf("%s%c",prefix_token,quote);
else if (quote != 0)
options.GetStream()->Printf("%c",quote);
uint8_t* data_end = buffer_sp->GetBytes()+buffer_sp->GetByteSize();
const bool escape_non_printables = options.GetEscapeNonPrintables();
lldb_private::formatters::StringPrinter::EscapingHelper escaping_callback;
if (escape_non_printables)
{
if (Language *language = Language::FindPlugin(options.GetLanguage()))
escaping_callback = language->GetStringPrinterEscapingHelper(lldb_private::formatters::StringPrinter::GetPrintableElementType::ASCII);
else
escaping_callback = lldb_private::formatters::StringPrinter::GetDefaultEscapingHelper(lldb_private::formatters::StringPrinter::GetPrintableElementType::ASCII);
}
// 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 (uint8_t* data = buffer_sp->GetBytes(); *data && (data < data_end);)
{
if (escape_non_printables)
{
uint8_t* next_data = nullptr;
auto printable = escaping_callback(data, data_end, next_data);
auto printable_bytes = printable.GetBytes();
auto printable_size = printable.GetSize();
if (!printable_bytes || !next_data)
{
// GetPrintable() failed on us - print one byte in a desperate resync attempt
printable_bytes = data;
printable_size = 1;
next_data = data+1;
}
for (unsigned c = 0; c < printable_size; c++)
options.GetStream()->Printf("%c", *(printable_bytes+c));
data = (uint8_t*)next_data;
}
else
{
options.GetStream()->Printf("%c",*data);
data++;
}
}
const char* suffix_token = options.GetSuffixToken();
if (suffix_token != 0)
options.GetStream()->Printf("%c%s",quote, suffix_token);
else if (quote != 0)
options.GetStream()->Printf("%c",quote);
if (is_truncated)
options.GetStream()->Printf("...");
return true;
}