6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
122 lines
3.1 KiB
C++
122 lines
3.1 KiB
C++
//===-- StringExtractor.h ---------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_UTILITY_STRINGEXTRACTOR_H
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#define LLDB_UTILITY_STRINGEXTRACTOR_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include <cstddef>
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#include <cstdint>
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#include <string>
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class StringExtractor {
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public:
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enum { BigEndian = 0, LittleEndian = 1 };
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// Constructors and Destructors
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StringExtractor();
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StringExtractor(llvm::StringRef packet_str);
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StringExtractor(const char *packet_cstr);
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virtual ~StringExtractor();
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void Reset(llvm::StringRef str) {
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m_packet = std::string(str);
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m_index = 0;
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}
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// Returns true if the file position is still valid for the data contained in
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// this string extractor object.
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bool IsGood() const { return m_index != UINT64_MAX; }
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uint64_t GetFilePos() const { return m_index; }
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void SetFilePos(uint32_t idx) { m_index = idx; }
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void Clear() {
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m_packet.clear();
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m_index = 0;
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}
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void SkipSpaces();
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llvm::StringRef GetStringRef() const { return m_packet; }
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bool Empty() { return m_packet.empty(); }
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size_t GetBytesLeft() {
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if (m_index < m_packet.size())
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return m_packet.size() - m_index;
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return 0;
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}
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char GetChar(char fail_value = '\0');
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char PeekChar(char fail_value = '\0') {
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const char *cstr = Peek();
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if (cstr)
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return cstr[0];
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return fail_value;
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}
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int DecodeHexU8();
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uint8_t GetHexU8(uint8_t fail_value = 0, bool set_eof_on_fail = true);
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bool GetHexU8Ex(uint8_t &ch, bool set_eof_on_fail = true);
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bool GetNameColonValue(llvm::StringRef &name, llvm::StringRef &value);
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int32_t GetS32(int32_t fail_value, int base = 0);
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uint32_t GetU32(uint32_t fail_value, int base = 0);
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int64_t GetS64(int64_t fail_value, int base = 0);
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uint64_t GetU64(uint64_t fail_value, int base = 0);
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uint32_t GetHexMaxU32(bool little_endian, uint32_t fail_value);
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uint64_t GetHexMaxU64(bool little_endian, uint64_t fail_value);
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size_t GetHexBytes(llvm::MutableArrayRef<uint8_t> dest,
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uint8_t fail_fill_value);
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size_t GetHexBytesAvail(llvm::MutableArrayRef<uint8_t> dest);
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size_t GetHexByteString(std::string &str);
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size_t GetHexByteStringFixedLength(std::string &str, uint32_t nibble_length);
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size_t GetHexByteStringTerminatedBy(std::string &str, char terminator);
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bool ConsumeFront(const llvm::StringRef &str);
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const char *Peek() {
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if (m_index < m_packet.size())
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return m_packet.c_str() + m_index;
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return nullptr;
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}
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protected:
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bool fail() {
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m_index = UINT64_MAX;
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return false;
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}
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/// The string in which to extract data.
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std::string m_packet;
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/// When extracting data from a packet, this index will march along as things
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/// get extracted. If set to UINT64_MAX the end of the packet data was
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/// reached when decoding information.
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uint64_t m_index = 0;
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};
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#endif // LLDB_UTILITY_STRINGEXTRACTOR_H
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