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00018 #include "pqxx/libcompiler.h"
00019
00020 #include <cstdio>
00021 #include <cctype>
00022 #include <sstream>
00023 #include <stdexcept>
00024 #include <string>
00025 #include <typeinfo>
00026 #include <vector>
00027
00048
00049 namespace pqxx {}
00050
00051 #include <pqxx/libpq-forward.hxx>
00052
00053
00054 namespace pqxx
00055 {
00057 const oid oid_none = 0;
00058
00060
00073 template<typename T> void error_unsupported_type_in_string_conversion(T);
00074
00075
00077
00083 template<typename T> PGSTD::string error_ambiguous_string_conversion(T);
00084
00085
00086
00087
00088
00090
00102 template<typename T> void from_string(const char Str[], T &Obj);
00103
00104 template<> void PQXX_LIBEXPORT from_string(const char Str[], long &);
00105 template<>
00106 void PQXX_LIBEXPORT from_string(const char Str[], unsigned long &);
00107 template<> void PQXX_LIBEXPORT from_string(const char Str[], int &);
00108 template<>
00109 void PQXX_LIBEXPORT from_string(const char Str[], unsigned int &);
00110 template<> void PQXX_LIBEXPORT from_string(const char Str[], short &);
00111 template<>
00112 void PQXX_LIBEXPORT from_string(const char Str[], unsigned short &);
00113 template<> void PQXX_LIBEXPORT from_string(const char Str[], float &);
00114 template<> void PQXX_LIBEXPORT from_string(const char Str[], double &);
00115 template<> void PQXX_LIBEXPORT from_string(const char Str[], bool &);
00116 #if defined(PQXX_HAVE_LONG_DOUBLE)
00117 template<>
00118 void PQXX_LIBEXPORT from_string(const char Str[], long double &);
00119 #endif
00120
00121
00122 template<> inline void from_string(const char Str[],PGSTD::string &Obj)
00123 { Obj = Str; }
00124
00125 template<>
00126 inline void from_string(const char Str[], PGSTD::stringstream &Obj)
00127 { Obj.clear(); Obj << Str; }
00128
00129 template<typename T>
00130 inline void from_string(const PGSTD::string &Str, T &Obj)
00131 { from_string(Str.c_str(), Obj); }
00132
00133 template<typename T>
00134 inline void from_string(const PGSTD::stringstream &Str, T &Obj)
00135 { from_string(Str.str(), Obj); }
00136
00137 template<> inline void
00138 from_string(const PGSTD::string &Str, PGSTD::string &Obj)
00139 { Obj = Str; }
00140
00141 template<> inline void
00142 from_string(const char [], const char &Obj)
00143 { error_ambiguous_string_conversion(Obj); }
00144 template<> inline void
00145 from_string(const char [], const signed char &Obj)
00146 { error_ambiguous_string_conversion(Obj); }
00147 template<> inline void
00148 from_string(const char [], const unsigned char &Obj)
00149 { error_ambiguous_string_conversion(Obj); }
00150
00151 template<> inline void
00152 from_string(const PGSTD::string &, const char &Obj)
00153 { error_ambiguous_string_conversion(Obj); }
00154 template<> inline void
00155 from_string(const PGSTD::string &, const signed char &Obj)
00156 { error_ambiguous_string_conversion(Obj); }
00157 template<> inline void
00158 from_string(const PGSTD::string &, const unsigned char &Obj)
00159 { error_ambiguous_string_conversion(Obj); }
00160
00161
00162 namespace internal
00163 {
00165 inline int digit_to_number(char c) throw () { return c-'0'; }
00166 inline char number_to_digit(int i) throw () { return i+'0'; }
00167 }
00168
00169
00171
00175 template<typename T> PGSTD::string to_string(const T &);
00176
00177 template<> PGSTD::string PQXX_LIBEXPORT to_string(const short &);
00178 template<>
00179 PGSTD::string PQXX_LIBEXPORT to_string(const unsigned short &);
00180 template<> PGSTD::string PQXX_LIBEXPORT to_string(const int &);
00181 template<>
00182 PGSTD::string PQXX_LIBEXPORT to_string(const unsigned int &);
00183 template<> PGSTD::string PQXX_LIBEXPORT to_string(const long &);
00184 template<>
00185 PGSTD::string PQXX_LIBEXPORT to_string(const unsigned long &);
00186 template<> PGSTD::string PQXX_LIBEXPORT to_string(const float &);
00187 template<> PGSTD::string PQXX_LIBEXPORT to_string(const double &);
00188 template<> PGSTD::string PQXX_LIBEXPORT to_string(const bool &);
00189 #if defined(PQXX_HAVE_LONG_DOUBLE)
00190 template<> PGSTD::string PQXX_LIBEXPORT to_string(const long double &);
00191 #endif
00192
00193 inline PGSTD::string to_string(const char Obj[])
00194 { return PGSTD::string(Obj); }
00195
00196 inline PGSTD::string to_string(const PGSTD::stringstream &Obj)
00197 { return Obj.str(); }
00198
00199 inline PGSTD::string to_string(const PGSTD::string &Obj) {return Obj;}
00200
00201 template<> PGSTD::string PQXX_LIBEXPORT to_string(const char &);
00202
00203
00204 template<> inline PGSTD::string to_string(const signed char &Obj)
00205 { return error_ambiguous_string_conversion(Obj); }
00206 template<> inline PGSTD::string to_string(const unsigned char &Obj)
00207 { return error_ambiguous_string_conversion(Obj); }
00208
00209
00211
00228 template<typename T=PGSTD::string, typename CONT=PGSTD::vector<T> >
00229 class items : public CONT
00230 {
00231 public:
00233 items() : CONT() {}
00235 explicit items(const T &t) : CONT() { push_back(t); }
00236 items(const T &t1, const T &t2) : CONT()
00237 { push_back(t1); push_back(t2); }
00238 items(const T &t1, const T &t2, const T &t3) : CONT()
00239 { push_back(t1); push_back(t2); push_back(t3); }
00240 items(const T &t1, const T &t2, const T &t3, const T &t4) : CONT()
00241 { push_back(t1); push_back(t2); push_back(t3); push_back(t4); }
00242 items(const T&t1,const T&t2,const T&t3,const T&t4,const T&t5):CONT()
00243 {push_back(t1);push_back(t2);push_back(t3);push_back(t4);push_back(t5);}
00245 items(const CONT &c) : CONT(c) {}
00246
00248 items &operator()(const T &t)
00249 {
00250 push_back(t);
00251 return *this;
00252 }
00253 };
00254
00255
00256 namespace internal
00257 {
00258
00260 template<typename ITER> struct dereference
00261 {
00262 typename ITER::value_type operator()(ITER i) const { return *i; }
00263 };
00264 template<typename T> struct deref_ptr { T operator()(T *i) const {return *i;} };
00265 }
00266
00267
00269 template<typename ITER, typename ACCESS> inline
00270 PGSTD::string separated_list(const PGSTD::string &sep,
00271 ITER begin,
00272 ITER end,
00273 ACCESS access)
00274 {
00275 PGSTD::string result;
00276 if (begin != end)
00277 {
00278 result = to_string(access(begin));
00279 for (++begin; begin != end; ++begin)
00280 {
00281 result += sep;
00282 result += to_string(access(begin));
00283 }
00284 }
00285 return result;
00286 }
00287
00289 template<typename ITER> inline PGSTD::string
00290 separated_list(const PGSTD::string &sep, ITER begin, ITER end)
00291 { return separated_list(sep,begin,end,internal::dereference<ITER>()); }
00292
00293
00295 template<typename OBJ> inline PGSTD::string
00296 separated_list(const PGSTD::string &sep, OBJ *begin, OBJ *end)
00297 { return separated_list(sep,begin,end,internal::deref_ptr<OBJ>()); }
00298
00299
00301 template<typename CONTAINER> inline PGSTD::string
00302 separated_list(const PGSTD::string &sep, const CONTAINER &c)
00303 { return separated_list(sep, c.begin(), c.end()); }
00304
00305
00307
00316 namespace internal
00317 {
00318 typedef unsigned long result_size_type;
00319 typedef long result_difference_type;
00320
00322
00330 template<typename T> inline const char *FmtString(T t)
00331 {
00332 error_unsupported_type_in_string_conversion(t);
00333 return 0;
00334 }
00335
00336 template<> inline const char *FmtString(short) { return "%hd"; }
00337 template<> inline const char *FmtString(unsigned short){ return "%hu"; }
00338 template<> inline const char *FmtString(int) { return "%i"; }
00339 template<> inline const char *FmtString(long) { return "%li"; }
00340 template<> inline const char *FmtString(unsigned) { return "%u"; }
00341 template<> inline const char *FmtString(unsigned long) { return "%lu"; }
00342 template<> inline const char *FmtString(float) { return "%f"; }
00343 template<> inline const char *FmtString(double) { return "%lf"; }
00344 template<> inline const char *FmtString(char) { return "%c"; }
00345 template<> inline const char *FmtString(unsigned char) { return "%c"; }
00346 #if defined(PQXX_HAVE_LONG_DOUBLE)
00347 template<> inline const char *FmtString(long double) { return "%Lf"; }
00348 #endif
00349
00350 }
00351
00353
00361 template<typename T> inline PGSTD::string ToString(const T &Obj)
00362 {
00363
00364 char Buf[500];
00365 sprintf(Buf, internal::FmtString(Obj), Obj);
00366 return PGSTD::string(Buf);
00367 }
00368
00369
00370 template<> inline PGSTD::string ToString(const PGSTD::string &Obj) {return Obj;}
00371 template<> inline PGSTD::string ToString(const char *const &Obj) { return Obj; }
00372 template<> inline PGSTD::string ToString(char *const &Obj) { return Obj; }
00373
00374 template<> inline PGSTD::string ToString(const unsigned char *const &Obj)
00375 {
00376 return reinterpret_cast<const char *>(Obj);
00377 }
00378
00379 template<> inline PGSTD::string ToString(const bool &Obj)
00380 {
00381 return ToString(unsigned(Obj));
00382 }
00383
00384 template<> inline PGSTD::string ToString(const short &Obj)
00385 {
00386 return ToString(int(Obj));
00387 }
00388
00389 template<> inline PGSTD::string ToString(const unsigned short &Obj)
00390 {
00391 return ToString(unsigned(Obj));
00392 }
00393
00394
00396
00404 template<typename T> inline void FromString(const char Str[], T &Obj)
00405 {
00406 if (!Str) throw PGSTD::runtime_error("Attempt to convert NULL string to " +
00407 PGSTD::string(typeid(T).name()));
00408
00409 if (sscanf(Str, internal::FmtString(Obj), &Obj) != 1)
00410 throw PGSTD::runtime_error("Cannot convert value '" +
00411 PGSTD::string(Str) +
00412 "' to " + typeid(T).name());
00413 }
00414
00415
00416 namespace internal
00417 {
00419
00421 void PQXX_LIBEXPORT FromString_string(const char Str[], PGSTD::string &Obj);
00422
00424
00426 void PQXX_LIBEXPORT FromString_ucharptr(const char Str[],
00427 const unsigned char *&Obj);
00428
00430 PGSTD::string PQXX_LIBEXPORT Quote_string(const PGSTD::string &Obj,
00431 bool EmptyIsNull);
00432
00434 PGSTD::string PQXX_LIBEXPORT Quote_charptr(const char Obj[], bool EmptyIsNull);
00435 }
00436
00437
00438 template<> inline void FromString(const char Str[], PGSTD::string &Obj)
00439 {
00440 internal::FromString_string(Str, Obj);
00441 }
00442
00443 template<> inline void FromString(const char Str[], const char *&Obj)
00444 {
00445 if (!Str) throw PGSTD::runtime_error("Attempt to read NULL string");
00446 Obj = Str;
00447 }
00448
00449 template<> inline void FromString(const char Str[], const unsigned char *&Obj)
00450 {
00451 internal::FromString_ucharptr(Str, Obj);
00452 }
00453
00454 template<> inline void FromString(const char Str[], bool &Obj)
00455 {
00456 from_string(Str, Obj);
00457 }
00458
00459
00461
00470 PGSTD::string PQXX_LIBEXPORT sqlesc(const char str[]);
00471
00473
00483 PGSTD::string PQXX_LIBEXPORT sqlesc(const char str[], size_t maxlen);
00484
00486
00492 PGSTD::string PQXX_LIBEXPORT sqlesc(const PGSTD::string &);
00493
00494
00496
00500 template<typename T> PGSTD::string Quote(const T &Obj, bool EmptyIsNull);
00501
00502
00504
00506 template<>
00507 inline PGSTD::string Quote(const PGSTD::string &Obj, bool EmptyIsNull)
00508 {
00509 return internal::Quote_string(Obj, EmptyIsNull);
00510 }
00511
00513
00515 template<> inline PGSTD::string Quote(const char *const & Obj, bool EmptyIsNull)
00516 {
00517 return internal::Quote_charptr(Obj, EmptyIsNull);
00518 }
00519
00520
00522
00527 template<int LEN> inline PGSTD::string Quote(const char (&Obj)[LEN],
00528 bool EmptyIsNull)
00529 {
00530 return internal::Quote_charptr(Obj, EmptyIsNull);
00531 }
00532
00533
00534 template<typename T> inline PGSTD::string Quote(const T &Obj, bool EmptyIsNull)
00535 {
00536 return Quote(ToString(Obj), EmptyIsNull);
00537 }
00538
00539
00541
00544 template<typename T> inline PGSTD::string Quote(T Obj)
00545 {
00546 return Quote(Obj, false);
00547 }
00548
00549
00550 namespace internal
00551 {
00552 void freepqmem(void *);
00553
00555
00567 template<typename T> class PQXX_LIBEXPORT PQAlloc
00568 {
00569 T *m_Obj;
00570 mutable const PQAlloc *m_l, *m_r;
00571 public:
00572 typedef T content_type;
00573
00574 PQAlloc() throw () : m_Obj(0), m_l(this), m_r(this) {}
00575 PQAlloc(const PQAlloc &rhs) throw () :
00576 m_Obj(0), m_l(this), m_r(this) { makeref(rhs); }
00577 ~PQAlloc() throw () { loseref(); }
00578
00579 PQAlloc &operator=(const PQAlloc &rhs) throw ()
00580 { if (&rhs != this) { loseref(); makeref(rhs); } return *this; }
00581
00583
00585 explicit PQAlloc(T *obj) throw () : m_Obj(obj), m_l(this), m_r(this) {}
00586
00587 void swap(PQAlloc &rhs) throw ()
00588 {
00589 PQAlloc tmp(*this);
00590 *this = rhs;
00591 rhs = tmp;
00592 }
00593
00594 PQAlloc &operator=(T *obj) throw () { loseref(); makeref(obj); return *this; }
00595
00597 operator bool() const throw () { return m_Obj != 0; }
00598
00600 bool operator!() const throw () { return !m_Obj; }
00601
00603
00605 T *operator->() const throw (PGSTD::logic_error)
00606 {
00607 if (!m_Obj) throw PGSTD::logic_error("Null pointer dereferenced");
00608 return m_Obj;
00609 }
00610
00612
00614 T &operator*() const throw (PGSTD::logic_error) { return *operator->(); }
00615
00617
00619 T *c_ptr() const throw () { return m_Obj; }
00620
00621 void clear() throw () { loseref(); }
00622
00623 private:
00624 void makeref(T *p) throw () { m_Obj = p; }
00625
00626 void makeref(const PQAlloc &rhs) throw ()
00627 {
00628 m_l = &rhs;
00629 m_r = rhs.m_r;
00630 m_l->m_r = m_r->m_l = this;
00631 m_Obj = rhs.m_Obj;
00632 }
00633
00635 void loseref() throw ()
00636 {
00637 if (m_l == this && m_Obj) freemem();
00638 m_Obj = 0;
00639 m_l->m_r = m_r;
00640 m_r->m_l = m_l;
00641 m_l = m_r = this;
00642 }
00643
00644 void freemem() throw () { freepqmem(m_Obj); }
00645 };
00646
00647
00648 void PQXX_LIBEXPORT freemem_result(pq::PGresult *) throw ();
00649 template<> inline void PQXX_LIBEXPORT PQAlloc<pq::PGresult>::freemem() throw ()
00650 { freemem_result(m_Obj); }
00651
00652 void PQXX_LIBEXPORT freemem_notif(pq::PGnotify *) throw ();
00653 template<> inline void PQXX_LIBEXPORT PQAlloc<pq::PGnotify>::freemem() throw ()
00654 { freemem_notif(m_Obj); }
00655
00656
00657
00658 template<typename T> class scoped_array
00659 {
00660 T *m_ptr;
00661 public:
00662 typedef size_t size_type;
00663 typedef long difference_type;
00664
00665 scoped_array() : m_ptr(0) {}
00666 explicit scoped_array(size_type n) : m_ptr(new T[n]) {}
00667 explicit scoped_array(T *t) : m_ptr(t) {}
00668 ~scoped_array() { delete [] m_ptr; }
00669
00670 T *c_ptr() const throw () { return m_ptr; }
00671 T &operator*() const throw () { return *m_ptr; }
00672 T &operator[](difference_type i) const throw () { return m_ptr[i]; }
00673
00674 scoped_array &operator=(T *t) throw ()
00675 {
00676 if (t != m_ptr)
00677 {
00678 delete [] m_ptr;
00679 m_ptr = t;
00680 }
00681 return *this;
00682 }
00683
00684 private:
00686 scoped_array(const scoped_array &);
00687 scoped_array &operator=(const scoped_array &);
00688 };
00689
00690
00691 class PQXX_LIBEXPORT namedclass
00692 {
00693 public:
00694 namedclass(const PGSTD::string &Name, const PGSTD::string &Classname) :
00695 m_Name(Name),
00696 m_Classname(Classname)
00697 {
00698 }
00699
00700 const PGSTD::string &name() const throw () { return m_Name; }
00701 const PGSTD::string &classname() const throw () {return m_Classname;}
00702 PGSTD::string description() const;
00703
00704 private:
00705 PGSTD::string m_Name, m_Classname;
00706 };
00707
00708
00709 void CheckUniqueRegistration(const namedclass *New, const namedclass *Old);
00710 void CheckUniqueUnregistration(const namedclass *New, const namedclass *Old);
00711
00712
00714
00717 template<typename GUEST>
00718 class unique
00719 {
00720 public:
00721 unique() : m_Guest(0) {}
00722
00723 GUEST *get() const throw () { return m_Guest; }
00724
00725 void Register(GUEST *G)
00726 {
00727 CheckUniqueRegistration(G, m_Guest);
00728 m_Guest = G;
00729 }
00730
00731 void Unregister(GUEST *G)
00732 {
00733 CheckUniqueUnregistration(G, m_Guest);
00734 m_Guest = 0;
00735 }
00736
00737 private:
00738 GUEST *m_Guest;
00739
00741 unique(const unique &);
00743 unique &operator=(const unique &);
00744 };
00745
00747
00750 void PQXX_LIBEXPORT sleep_seconds(int);
00751
00752 }
00753 }
00754