forked from OSchip/llvm-project
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
//===-- StdStringExtractor.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 utility_StdStringExtractor_h_
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#define utility_StdStringExtractor_h_
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#include <stdint.h>
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#include <string>
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// Based on StringExtractor, with the added limitation that this file should not
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// take a dependency on LLVM, as it is used from debugserver.
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class StdStringExtractor {
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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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StdStringExtractor();
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StdStringExtractor(const char *packet_cstr);
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virtual ~StdStringExtractor();
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// Returns true if the file position is still valid for the data
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// contained in 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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const std::string &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(std::string &name, std::string &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(void *dst, size_t dst_len, uint8_t fail_fill_value);
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size_t GetHexBytesAvail(void *dst, size_t dst_len);
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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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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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// For StdStringExtractor only
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std::string m_packet; // The string in which to extract data.
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uint64_t m_index; // When extracting data from a packet, this index
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// will march along as things get extracted. If set
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// to UINT64_MAX the end of the packet data was
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// reached when decoding information
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};
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#endif // utility_StringExtractor_h_
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