src/base/TextException.cc

   1 #include "squid-old.h"
   2 #include "base/TextException.h"
   3 #include "Debug.h"
   4 #include "util.h"
   5
   6 TextException::TextException()
   7 {
   8     message=NULL;
   9     theFileName=NULL;
  10     theLineNo=0;
  11     theId=0;
  12 }
  13
  14 TextException::TextException(const TextException& right) :
  15         message((right.message?xstrdup(right.message):NULL)), theFileName(right.theFileName), theLineNo(right.theLineNo), theId(right.theId)
  16 {
  17 }
  18
  19 TextException::TextException(const char *aMsg, const char *aFileName, int aLineNo, unsigned int anId):
  20         message(xstrdup(aMsg)), theFileName(aFileName), theLineNo(aLineNo), theId(anId)
  21 {}
  22
  23 TextException::~TextException() throw()
  24 {
  25     if (message) xfree(message);
  26 }
  27
  28 TextException& TextException::operator=(const TextException &right)
  29 {
  30     if (this==&right) return *this;
  31     if (message) xfree(message);
  32     message=(right.message?xstrdup(right.message):NULL);
  33     theFileName=right.theFileName;
  34     theLineNo=right.theLineNo;
  35     theId=right.theId;
  36     return *this;
  37 }
  38
  39 const char *TextException::what() const throw()
  40 {
  41     /// \todo add file:lineno
  42     return message ? message : "TextException without a message";
  43 }
  44
  45 unsigned int TextException::FileNameHash(const char *fname)
  46 {
  47     const char *s = NULL;
  48     unsigned int n = 0;
  49     unsigned int j = 0;
  50     unsigned int i = 0;
  51     s = strrchr(fname, '/');
  52
  53     if (s)
  54         ++s;
  55     else
  56         s = fname;
  57
  58     while (*s) {
  59         ++j;
  60         n ^= 271 * (unsigned) *s;
  61         ++s;
  62     }
  63     i = n ^ (j * 271);
  64     /*18bits of a 32 bit integer used  for filename hash (max hash=262143),
  65       and 14 bits for storing line number (16k max).
  66       If you change this policy remember to update the FileNameHash function
  67       in the scripts/calc-must-ids.pl script
  68     */
  69     return i % 262143;
  70 }
  71
  72 void Throw(const char *message, const char *fileName, int lineNo, unsigned int id)
  73 {
  74
  75     // or should we let the exception recepient print the exception instead?
  76
  77     if (fileName) {
  78         debugs(0, 3, fileName << ':' << lineNo << ": exception" <<
  79                (message ? ": " : ".") << (message ? message : ""));
  80     } else {
  81         debugs(0, 3, "exception" <<
  82                (message ? ": " : ".") << (message ? message : ""));
  83     }
  84
  85     throw TextException(message, fileName, lineNo, id);
  86 }