cxx_except.cpp
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:3k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: cxx_except.cpp,v 11.7 2000/09/21 15:05:45 dda Exp $";
- #endif /* not lint */
- #include <string.h>
- #include "db_cxx.h"
- #include "cxx_int.h"
- // tmpString is used to create strings on the stack
- //
- class tmpString
- {
- public:
- tmpString(const char *str1,
- const char *str2 = 0,
- const char *str3 = 0,
- const char *str4 = 0,
- const char *str5 = 0)
- {
- int len = strlen(str1);
- if (str2)
- len += strlen(str2);
- if (str3)
- len += strlen(str3);
- if (str4)
- len += strlen(str4);
- if (str5)
- len += strlen(str5);
- s_ = new char[len+1];
- strcpy(s_, str1);
- if (str2)
- strcat(s_, str2);
- if (str3)
- strcat(s_, str3);
- if (str4)
- strcat(s_, str4);
- if (str5)
- strcat(s_, str5);
- }
- ~tmpString() { delete [] s_; }
- operator const char *() { return (s_); }
- private:
- char *s_;
- };
- // Note: would not be needed if we can inherit from exception
- // It does not appear to be possible to inherit from exception
- // with the current Microsoft library (VC5.0).
- //
- static char *dupString(const char *s)
- {
- char *r = new char[strlen(s)+1];
- strcpy(r, s);
- return (r);
- }
- ////////////////////////////////////////////////////////////////////////
- // //
- // DbException //
- // //
- ////////////////////////////////////////////////////////////////////////
- DbException::~DbException()
- {
- if (what_)
- delete [] what_;
- }
- DbException::DbException(int err)
- : err_(err)
- {
- what_ = dupString(db_strerror(err));
- }
- DbException::DbException(const char *description)
- : err_(0)
- {
- what_ = dupString(tmpString(description));
- }
- DbException::DbException(const char *prefix, int err)
- : err_(err)
- {
- what_ = dupString(tmpString(prefix, ": ", db_strerror(err)));
- }
- DbException::DbException(const char *prefix1, const char *prefix2, int err)
- : err_(err)
- {
- what_ = dupString(tmpString(prefix1, ": ", prefix2, ": ", db_strerror(err)));
- }
- DbException::DbException(const DbException &that)
- : err_(that.err_)
- {
- what_ = dupString(that.what_);
- }
- DbException &DbException::operator = (const DbException &that)
- {
- if (this != &that) {
- err_ = that.err_;
- if (what_)
- delete [] what_;
- what_ = 0; // in case new throws exception
- what_ = dupString(that.what_);
- }
- return (*this);
- }
- int DbException::get_errno() const
- {
- return (err_);
- }
- const char *DbException::what() const
- {
- return (what_);
- }