1 //===-- StringExtractor.h ---------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef utility_StringExtractor_h_ 11 #define utility_StringExtractor_h_ 12 13 // C Includes 14 // C++ Includes 15 #include <string> 16 #include <stdint.h> 17 18 // Other libraries and framework includes 19 // Project includes 20 21 class StringExtractor 22 { 23 public: 24 25 enum { 26 BigEndian = 0, 27 LittleEndian = 1 28 }; 29 //------------------------------------------------------------------ 30 // Constructors and Destructors 31 //------------------------------------------------------------------ 32 StringExtractor(); 33 StringExtractor(const char *packet_cstr); 34 StringExtractor(const StringExtractor& rhs); 35 virtual ~StringExtractor(); 36 37 //------------------------------------------------------------------ 38 // Operators 39 //------------------------------------------------------------------ 40 const StringExtractor& 41 operator=(const StringExtractor& rhs); 42 43 // Returns true if the file position is still valid for the data 44 // contained in this string extractor object. 45 bool 46 IsGood() const 47 { 48 return m_index != UINT64_MAX; 49 } 50 51 uint64_t 52 GetFilePos () const 53 { 54 return m_index; 55 } 56 57 void 58 SetFilePos (uint32_t idx) 59 { 60 m_index = idx; 61 } 62 63 void 64 Clear () 65 { 66 m_packet.clear(); 67 m_index = 0; 68 } 69 70 std::string & 71 GetStringRef () 72 { 73 return m_packet; 74 } 75 76 const std::string & 77 GetStringRef () const 78 { 79 return m_packet; 80 } 81 82 bool 83 Empty() 84 { 85 return m_packet.empty(); 86 } 87 88 size_t 89 GetBytesLeft () 90 { 91 if (m_index < m_packet.size()) 92 return m_packet.size() - m_index; 93 return 0; 94 } 95 char 96 GetChar (char fail_value = '\0'); 97 98 uint8_t 99 GetHexU8 (uint8_t fail_value = 0, bool set_eof_on_fail = true); 100 101 bool 102 GetNameColonValue (std::string &name, std::string &value); 103 104 uint32_t 105 GetU32 (uint32_t fail_value, int base = 0); 106 107 uint32_t 108 GetHexMaxU32 (bool little_endian, uint32_t fail_value); 109 110 uint64_t 111 GetHexMaxU64 (bool little_endian, uint64_t fail_value); 112 113 size_t 114 GetHexBytes (void *dst, size_t dst_len, uint8_t fail_fill_value); 115 116 uint64_t 117 GetHexWithFixedSize (uint32_t byte_size, bool little_endian, uint64_t fail_value); 118 119 size_t 120 GetHexByteString (std::string &str); 121 122 const char * 123 Peek () 124 { 125 if (m_index < m_packet.size()) 126 return m_packet.c_str() + m_index; 127 return NULL; 128 } 129 130 protected: 131 //------------------------------------------------------------------ 132 // For StringExtractor only 133 //------------------------------------------------------------------ 134 std::string m_packet; // The string in which to extract data. 135 uint64_t m_index; // When extracting data from a packet, this index 136 // will march along as things get extracted. If set 137 // to UINT64_MAX the end of the packet data was 138 // reached when decoding information 139 }; 140 141 #endif // utility_StringExtractor_h_ 142
