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-rw-r--r--ace/Env_Value_T.h158
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diff --git a/ace/Env_Value_T.h b/ace/Env_Value_T.h
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-/* This may look like C, but it's really -*- C++ -*- */
-// $Id$
-
-// ============================================================================
-//
-// = LIBRARY
-// ACE
-//
-// = DESCRIPTION
-// Template to encapsulate getting a value from an environment variable
-// and using a supplied default value if not in the environment.
-//
-// = AUTHOR
-// Chris Cleeland (derived from work by Carlos O'Ryan)
-//
-// ============================================================================
-
-#ifndef ACE_ENV_VALUE_T_H
-#define ACE_ENV_VALUE_T_H
-#include "ace/pre.h"
-
-#include "ace/OS.h" // Need to get ACE_static_cast definition
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-template <class T>
-class ACE_Env_Value
-{
- // = TITLE
- // Enviroment Variable Value
- //
- // = DESCRIPTION
- // Reads a variable from the user enviroment, providing a default
- // value.
- //
- // = AUTHOR
- // Chris Cleeland, Carlos O'Ryan
-public:
- ACE_Env_Value (void);
- // Default constructor which isn't bound to a specific environment
- // variable name or a default value. Before being useful it must
- // <open>'d.
-
- ACE_Env_Value (const ACE_TCHAR *varname,
- const T &vardefault);
- // Constructor that calls <open>.
-
- ~ACE_Env_Value (void);
- // Destroy the value.
-
- operator T (void);
- // Returns the value as type T.
-
- void open (const ACE_TCHAR *varname, const T &defval);
- // The constructor, read <varname> from the enviroment, using
- // <vardefault> as its value if it is not defined.
-
- const ACE_TCHAR *varname (void) const;
- // Returns the name of the variable being tracked.
-
-private:
- ACE_UNIMPLEMENTED_FUNC (ACE_Env_Value(const ACE_Env_Value<T> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Env_Value<T> operator=(const ACE_Env_Value<T> &))
- // Disallow copying and assignment.
-
- void fetch_value (void);
-
- const ACE_TCHAR *varname_;
- T value_;
-};
-
-template <class T> void ACE_Convert (const ACE_TCHAR *s, T &t);
-// Function to convert a string <s> into type <T>.
-
-#if defined (__ACE_INLINE__)
-#include "ace/Env_Value_T.i"
-#endif /* __ACE_INLINE__ */
-
-#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
-#include "ace/Env_Value_T.cpp"
-#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
-
-
-// Default calls a CTOR on type T of the form 'T::T(const char*)', but
-// users can feel free to create their own specialized conversion
-// functions if necessary, as shown below. Note that for 'char*' the
-// default is used because a simple cast will be performed and no
-// conversion will be necessary.
-
-template <class T> inline void
-ACE_Convert (const ACE_TCHAR *s, T &t)
-{
- t = T (s);
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, ACE_TCHAR *&v)
-{
- v = (ACE_TCHAR *) s;
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, const ACE_TCHAR *&v)
-{
- v = (const ACE_TCHAR *) s;
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, short &si)
-{
- si = ACE_static_cast (short, ACE_OS::strtol (s, 0, 10));
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, u_short &us)
-{
- us = ACE_static_cast (u_short, ACE_OS::strtol (s, 0, 10));
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, u_int &i)
-{
- i = ACE_static_cast (u_int,
- ACE_OS::strtol (s, 0, 10));
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, long &l)
-{
- l = ACE_OS::strtol (s, 0, 10);
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, int &i)
-{
- i = ACE_static_cast (int, ACE_OS::strtol (s, 0, 10));
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, u_long &ul)
-{
- ul = ACE_OS::strtoul (s, 0, 10);
-}
-
-inline void
-ACE_Convert (const ACE_TCHAR *s, double &d)
-{
- d = ACE_OS::strtod (s, 0);
-}
-
-#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
-#pragma implementation ("Env_Value_T.cpp")
-#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
-
-#include "ace/post.h"
-#endif /* ACE_ENV_VALUE_T_H */