src/String.cci

   1 /*
   2  * $Id: String.cci,v 1.12 2008/02/11 23:01:23 amosjeffries Exp $
   3  *
   4  * DEBUG: section 67    String
   5  * AUTHOR: Duane Wessels
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  */
  34
  35 #include "assert.h"
  36
  37 String::String() : size_(0), len_(0), buf_ (NULL)
  38 {
  39 #if DEBUGSTRINGS
  40     StringRegistry::Instance().add(this);
  41 #endif
  42 }
  43
  44 int
  45 String::size() const
  46 {
  47     return len_;
  48 }
  49
  50 char const *
  51 String::buf() const
  52 {
  53     return buf_;
  54 }
  55
  56 char&
  57 String::operator [](unsigned int pos)
  58 {
  59     assert(pos < size_);
  60
  61     return buf_[pos];
  62 }
  63
  64 const char *
  65 String::pos(char const *aString) const
  66 {
  67     return strstr(buf(), aString);
  68 }
  69
  70 const char *
  71 String::pos(char const ch) const
  72 {
  73     return strchr(buf(), ch);
  74 }
  75
  76 const char *
  77 String::rpos(char const ch) const
  78 {
  79     return strrchr(buf(), (ch));
  80 }
  81
  82 int
  83 String::cmp (char const *aString) const
  84 {
  85     /* strcmp fails on NULLS */
  86
  87     if (size() == 0 && (aString == NULL || aString[0] == '\0'))
  88         return 0;
  89
  90     if (size() == 0)
  91         return -1;
  92
  93     if (aString == NULL || aString[0] == '\0')
  94         return 1;
  95
  96     return strcmp(buf(), aString);
  97 }
  98
  99 int
 100 String::cmp (char const *aString, size_t count) const
 101 {
 102     /* always the same at length 0 */
 103
 104     if (count == 0)
 105         return 0;
 106
 107     if (size() == 0 && (aString == NULL || aString[0] == '\0'))
 108         return 0;
 109
 110     if (size() == 0)
 111         return -1;
 112
 113     if (aString == NULL || aString[0] == '\0')
 114         return 1;
 115
 116     return strncmp(buf(), aString, count);
 117 }
 118
 119 int
 120 String::cmp (String const &aString) const
 121 {
 122     /* strcmp fails on NULLS */
 123
 124     if (size() == 0 && aString.size() == 0)
 125         return 0;
 126
 127     if (size() == 0)
 128         return -1;
 129
 130     if (aString.size() == 0)
 131         return 1;
 132
 133     return strcmp(buf(), aString.buf());
 134 }
 135
 136 int
 137 String::caseCmp(char const *aString) const
 138 {
 139     return strcasecmp(buf(), aString);
 140 }
 141
 142 int
 143 String::caseCmp(char const *aString, size_t count) const
 144 {
 145     return strncasecmp(buf(), aString, count);
 146 }
 147
 148 void
 149 String::set(char const *loc, char const ch)
 150 {
 151     if(loc < buf_ || loc > (buf_ + size_) ) return;
 152
 153     buf_[loc-buf_] = ch;
 154 }
 155
 156 void
 157 String::cut(size_t newLength)
 158 {
 159     if(newLength < 0 || newLength > len_) return;
 160
 161     len_ = newLength;
 162
 163     // buf_ may be NULL on zero-length strings.
 164     if(len_ == 0 && buf_ == NULL) return;
 165
 166     buf_[newLength] = '\0';
 167 }
 168
 169 void
 170 String::cutPointer(char const *loc)
 171 {
 172     if(loc < buf_ || loc > (buf_ + size_) ) return;
 173
 174     len_ = loc-buf_;
 175     buf_[len_] = '\0';
 176 }
 177
 178 std::ostream &
 179 operator<<(std::ostream& os, String const &aString)
 180 {
 181     os << aString.buf();
 182     return os;
 183 }