1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 // -*- c++ -*- 19 // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 20 21 // P V S T R I N G C L A S S 22 23 // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 24 25 // - - Inclusion - - - - - - - - - - - - - - - - - - - - - - - - - - - - 26 27 #include "pv_string.h" 28 #include "oscl_mem.h" 29 30 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 31 32 String::String() 33 { 34 rep = OSCL_NEW(Srep, (0, "")); 35 } 36 37 String::String(const String& src) 38 { 39 src.rep->mutex.Lock(); 40 src.rep->refcnt++; 41 rep = src.rep; 42 src.rep->mutex.Unlock(); 43 } 44 45 String::~String() 46 { 47 rep->mutex.Lock(); 48 if (--rep->refcnt == 0) 49 { 50 OSCL_DELETE(rep); 51 } 52 else rep->mutex.Unlock(); 53 } 54 55 String& String::operator=(const String & src) 56 { 57 58 if (rep == src.rep) 59 { 60 return *this; // protect against "str = str" 61 } 62 src.rep->mutex.Lock(); 63 src.rep->refcnt++; 64 rep->mutex.Lock(); 65 if (--rep->refcnt == 0) 66 { 67 OSCL_DELETE(rep); 68 } 69 else 70 { 71 rep->mutex.Unlock(); 72 } 73 74 rep = src.rep; 75 src.rep->mutex.Unlock(); 76 return *this; 77 78 } 79 80 String& String::operator+=(const char * src) 81 { 82 Srep *new_rep; 83 int new_size = rep->size + oscl_strlen(src); 84 new_rep = OSCL_NEW(Srep, (new_size, rep->buffer)); 85 oscl_strcat(new_rep->buffer, src); 86 rep->mutex.Lock(); 87 if (--rep->refcnt == 0) 88 { 89 OSCL_DELETE(rep); 90 } 91 else 92 { 93 rep->mutex.Unlock(); 94 } 95 rep = new_rep; 96 return *this; 97 } 98 99 String& String::operator+=(const String & src) 100 { 101 Srep *new_rep; 102 int new_size = rep->size + src.rep->size; 103 new_rep = OSCL_NEW(Srep, (new_size, rep->buffer)); 104 105 oscl_strcat(new_rep->buffer, src.rep->buffer); 106 rep->mutex.Lock(); 107 if (--rep->refcnt == 0) 108 { 109 OSCL_DELETE(rep); 110 } 111 else 112 { 113 rep->mutex.Unlock(); 114 } 115 rep = new_rep; 116 return *this; 117 } 118 119 String & String::operator+=(const char c) 120 { 121 char tmp_str[2]; 122 tmp_str[0] = c; 123 tmp_str[1] = '\0'; 124 125 return ((*this) += tmp_str); 126 } 127 128 129 130 String::String(const char *src) 131 { 132 rep = OSCL_NEW(Srep, (oscl_strlen(src), src)); 133 } 134 135 String::String(const char *src, int length) 136 { 137 rep = OSCL_NEW(Srep, (length, src)); 138 } 139 140 141 String& String::operator=(const char * src) 142 { 143 rep->mutex.Lock(); 144 if (rep->refcnt == 1) 145 { 146 rep->assign(oscl_strlen(src), src); 147 rep->mutex.Unlock(); 148 } 149 else 150 { 151 rep->refcnt--; 152 rep->mutex.Unlock(); 153 rep = OSCL_NEW(Srep, (oscl_strlen(src), src)); 154 } 155 156 return *this; 157 } 158 159 160 161 char String::operator[](int index) const 162 { 163 if (index < 0 || index >= rep->size) 164 return '\0'; 165 return rep->buffer[index]; 166 } 167 168 169 char String::hash() const 170 { 171 unsigned long h = 0; 172 char uc = 0; 173 int ii; 174 char *ptr; 175 176 for (ii = 0, ptr = rep->buffer ; ii < rep->size; ++ii, ++ptr) 177 { 178 h = 5 * h + *ptr; 179 } 180 181 for (ii = 0; ii < 4; ++ii) 182 { 183 uc ^= h & 0xFF; 184 h >>= 8; 185 } 186 return uc; 187 } 188