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libcompiler.h

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00001 /*-------------------------------------------------------------------------
00002  *
00003  *   FILE
00004  *      pqxx/libcompiler.h
00005  *
00006  *   DESCRIPTION
00007  *      Compiler deficiency workarounds for libpqxx clients
00008  *
00009  * Copyright (c) 2002-2005, Jeroen T. Vermeulen <jtv@xs4all.nl>
00010  *
00011  * See COPYING for copyright license.  If you did not receive a file called
00012  * COPYING with this source code, please notify the distributor of this mistake,
00013  * or contact the author.
00014  *
00015  *-------------------------------------------------------------------------
00016  */
00017 #ifndef PQXX_LIBCOMPILER_H
00018 #define PQXX_LIBCOMPILER_H
00019 
00020 #ifdef _MSC_VER
00021 
00022 /* Work around a particularly pernicious and deliberate bug in Visual C++:
00023  * min() and max() are defined as macros, which can have some very nasty
00024  * consequences.  This compiler bug can be switched off by defining NOMINMAX.
00025  *
00026  * We don't like making choices for the user and defining environmental macros
00027  * of our own accord, but in this case it's the only way to compile without
00028  * incurring a significant risk of bugs--and there doesn't appear to be any
00029  * downside.  One wonders why this compiler wart is being maintained at all,
00030  * since the introduction of inline functions back in the 20th century.
00031  */
00032 #if defined(min) || defined(max)
00033 #error "Oops: min() and/or max() are defined as preprocessor macros.\
00034   Define NOMINMAX macro before including any system headers!"
00035 #endif
00036 
00037 #ifndef NOMINMAX
00038 #define NOMINMAX
00039 #endif
00040 
00041 #endif
00042 
00043 
00044 // Workarounds & definitions that need to be included even in library's headers
00045 #include "pqxx/config-public-compiler.h"
00046 
00047 
00048 #ifdef PQXX_BROKEN_ITERATOR
00049 #include <cstddef>
00050 #include <cstdlib>
00052 
00060 namespace PGSTD
00061 {
00063 template<typename Cat,
00064          typename T,
00065          typename Dist,
00066          typename Ptr=T*,
00067          typename Ref=T&> struct iterator
00068 {
00069   typedef Cat iterator_category;
00070   typedef T value_type;
00071   typedef Dist difference_type;
00072   typedef Ptr pointer;
00073   typedef Ref reference;
00074 };
00075 }
00076 #else
00077 #include <iterator>
00078 #endif // PQXX_BROKEN_ITERATOR
00079 
00080 #ifndef PQXX_HAVE_CHAR_TRAITS
00081 #include <cstddef>
00082 namespace PGSTD
00083 {
00085 template<typename CHAR> struct char_traits {};
00087 template<> struct char_traits<char>
00088 {
00089   typedef int int_type;
00090   typedef size_t pos_type;
00091   typedef long off_type;
00092   typedef char char_type;
00093 
00094   static int_type eof() { return -1; }
00095 };
00097 template<> struct char_traits<unsigned char>
00098 {
00099   typedef int int_type;
00100   typedef size_t pos_type;
00101   typedef long off_type;
00102   typedef unsigned char char_type;
00103 
00104   static int_type eof() { return -1; }
00105 };
00106 }
00107 #endif
00108 
00109 // Workarounds for SUN Workshop 6
00110 #if defined(__SUNPRO_CC)
00111 #if __SUNPRO_CC_COMPAT < 5
00112 #error "This compiler version is not capable of building libpqxx."
00113 #endif  // __SUNPRO_CC_COMPAT < 5
00114 #endif  // __SUNPRO_CC
00115 
00116 
00117 // Workarounds for Compaq C++ for Alpha
00118 #if defined(__DECCXX_VER)
00119 #define __USE_STD_IOSTREAM
00120 #endif  // __DECCXX_VER
00121 
00122 
00123 // Workarounds for Windows
00124 #ifdef _WIN32
00125 
00126 
00127 /* For now, export DLL symbols if _DLL is defined.  This is done automatically
00128  * by the compiler when linking to the dynamic version of the runtime library,
00129  * according to "gzh"
00130  */
00131 // TODO: Define custom macro to govern how libpqxx will be linked to client
00132 #if !defined(PQXX_LIBEXPORT) && defined(PQXX_SHARED)
00133 #define PQXX_LIBEXPORT __declspec(dllimport)
00134 #endif  // !PQXX_LIBEXPORT && PQXX_SHARED
00135 
00136 
00137 // Workarounds for Microsoft Visual C++
00138 #ifdef _MSC_VER
00139 
00140 #if _MSC_VER < 1300
00141 #error If you're using Visual C++, you'll need at least version 7 (VC.NET)
00142 #elif _MSC_VER < 1310
00143 // Workarounds for pre-2003 Visual C++.NET
00144 #undef PQXX_HAVE_REVERSE_ITERATOR
00145 #define PQXX_NO_PARTIAL_CLASS_TEMPLATE_SPECIALISATION
00146 #define PQXX_TYPENAME
00147 #endif  // _MSC_VER < 1310
00148 
00149 #pragma warning (disable: 4290)
00150 #pragma warning (disable: 4355)
00151 #pragma warning (disable: 4786)
00152 #pragma warning (disable: 4251 4275 4273)
00153 #pragma comment(lib, "libpqdll")
00154 
00156 
00168 #define PQXX_QUIET_DESTRUCTORS
00169 
00170 #endif  // _MSC_VER
00171 #endif  // _WIN32
00172 
00173 #ifndef PQXX_LIBEXPORT
00174 #define PQXX_LIBEXPORT
00175 #endif
00176 
00177 #ifndef PQXX_PRIVATE
00178 #define PQXX_PRIVATE
00179 #endif
00180 
00181 // Some compilers (well, VC) stumble over some required cases of "typename"
00182 #ifndef PQXX_TYPENAME
00183 #define PQXX_TYPENAME typename
00184 #endif
00185 
00186 #endif
00187 

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