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//===-- StdStringExtractor.h ------------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_STDSTRINGEXTRACTOR_H
#define LLDB_TOOLS_DEBUGSERVER_SOURCE_STDSTRINGEXTRACTOR_H
#include <cstdint>
#include <string>
// Based on StringExtractor, with the added limitation that this file should not
// take a dependency on LLVM, as it is used from debugserver.
class StdStringExtractor {
public:
enum { BigEndian = 0, LittleEndian = 1 };
// Constructors and Destructors
StdStringExtractor();
StdStringExtractor(const char *packet_cstr);
virtual ~StdStringExtractor();
// Returns true if the file position is still valid for the data
// contained in this string extractor object.
bool IsGood() const { return m_index != UINT64_MAX; }
uint64_t GetFilePos() const { return m_index; }
void SetFilePos(uint32_t idx) { m_index = idx; }
void Clear() {
m_packet.clear();
m_index = 0;
}
void SkipSpaces();
const std::string &GetStringRef() const { return m_packet; }
bool Empty() { return m_packet.empty(); }
size_t GetBytesLeft() {
if (m_index < m_packet.size())
return m_packet.size() - m_index;
return 0;
}
char GetChar(char fail_value = '\0');
char PeekChar(char fail_value = '\0') {
const char *cstr = Peek();
if (cstr)
return cstr[0];
return fail_value;
}
int DecodeHexU8();
uint8_t GetHexU8(uint8_t fail_value = 0, bool set_eof_on_fail = true);
bool GetHexU8Ex(uint8_t &ch, bool set_eof_on_fail = true);
bool GetNameColonValue(std::string &name, std::string &value);
int32_t GetS32(int32_t fail_value, int base = 0);
uint32_t GetU32(uint32_t fail_value, int base = 0);
int64_t GetS64(int64_t fail_value, int base = 0);
uint64_t GetU64(uint64_t fail_value, int base = 0);
uint32_t GetHexMaxU32(bool little_endian, uint32_t fail_value);
uint64_t GetHexMaxU64(bool little_endian, uint64_t fail_value);
size_t GetHexBytes(void *dst, size_t dst_len, uint8_t fail_fill_value);
size_t GetHexBytesAvail(void *dst, size_t dst_len);
size_t GetHexByteString(std::string &str);
size_t GetHexByteStringFixedLength(std::string &str, uint32_t nibble_length);
size_t GetHexByteStringTerminatedBy(std::string &str, char terminator);
const char *Peek() {
if (m_index < m_packet.size())
return m_packet.c_str() + m_index;
return nullptr;
}
protected:
// For StdStringExtractor only
std::string m_packet; // The string in which to extract data.
uint64_t m_index; // When extracting data from a packet, this index
// will march along as things get extracted. If set
// to UINT64_MAX the end of the packet data was
// reached when decoding information
};
#endif // LLDB_TOOLS_DEBUGSERVER_SOURCE_STDSTRINGEXTRACTOR_H