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/*
* pqStubInit.c --
*
* Stubs tables for the foreign PostgreSQL libraries so that
* Tcl extensions can use them without the linker's knowing about them.
*
* @CREATED@ 2015-06-26 12:55:15Z by genExtStubs.tcl from ../generic/pqStubDefs.txt
*
* Copyright (c) 2010 by Kevin B. Kenny.
*
* Please refer to the file, 'license.terms' for the conditions on
* redistribution of this file and for a DISCLAIMER OF ALL WARRANTIES.
*
*-----------------------------------------------------------------------------
*/
#include <tcl.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include "fakepq.h"
/*
* Static data used in this file
*/
/*
* Names of the libraries that might contain the PostgreSQL API
*/
#if defined(__CYGWIN__) && !defined(LIBPREFIX)
# define LIBPREFIX "cyg"
#else
# define LIBPREFIX "lib"
#endif
static const char *const pqStubLibNames[] = {
/* @LIBNAMES@: DO NOT EDIT THESE NAMES */
"pq", NULL
/* @END@ */
};
/* ABI Version numbers of the PostgreSQL API that we can cope with */
static const char pqSuffixes[][4] = {
"", ".5"
};
/* Names of the functions that we need from PostgreSQL */
static const char *const pqSymbolNames[] = {
/* @SYMNAMES@: DO NOT EDIT THESE NAMES */
"pg_encoding_to_char",
"PQclear",
"PQclientEncoding",
"PQcmdTuples",
"PQconnectdb",
"PQerrorMessage",
"PQdescribePrepared",
"PQexec",
"PQexecPrepared",
"PQdb",
"PQfinish",
"PQfname",
"PQfnumber",
"PQftype",
"PQgetisnull",
"PQgetlength",
"PQgetvalue",
"PQhost",
"PQnfields",
"PQnparams",
"PQntuples",
"PQoptions",
"PQparamtype",
"PQpass",
"PQport",
"PQprepare",
"PQresultErrorField",
"PQresultStatus",
"PQsetClientEncoding",
"PQsetNoticeProcessor",
"PQstatus",
"PQuser",
"PQtty",
NULL
/* @END@ */
};
/*
* Table containing pointers to the functions named above.
*/
static pqStubDefs pqStubsTable;
const pqStubDefs* pqStubs = &pqStubsTable;
/*
*-----------------------------------------------------------------------------
*
* PQInitStubs --
*
* Initialize the Stubs table for the PostgreSQL API
*
* Results:
* Returns the handle to the loaded PostgreSQL client library, or NULL
* if the load is unsuccessful. Leaves an error message in the
* interpreter.
*
*-----------------------------------------------------------------------------
*/
MODULE_SCOPE Tcl_LoadHandle
PostgresqlInitStubs(Tcl_Interp* interp)
{
int i;
size_t j;
int status; /* Status of Tcl library calls */
Tcl_Obj* path; /* Path name of a module to be loaded */
Tcl_Obj* shlibext; /* Extension to use for load modules */
Tcl_LoadHandle handle = NULL;
/* Handle to a load module */
/* Determine the shared library extension */
status = Tcl_EvalEx(interp, "::info sharedlibextension", -1,
TCL_EVAL_GLOBAL);
if (status != TCL_OK) return NULL;
shlibext = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(shlibext);
/* Walk the list of possible library names to find an PostgreSQL client */
status = TCL_ERROR;
for (i = 0; status == TCL_ERROR && pqStubLibNames[i] != NULL; ++i) {
for (j = 0; status == TCL_ERROR && (j < sizeof(pqSuffixes)/sizeof(pqSuffixes[0])); ++j) {
path = Tcl_NewStringObj(LIBPREFIX, -1);
Tcl_AppendToObj(path, pqStubLibNames[i], -1);
#ifdef __CYGWIN__
if (*pqSuffixes[j]) {
Tcl_AppendToObj(path, "-", -1);
Tcl_AppendToObj(path, pqSuffixes[j]+1, -1);
}
#endif
Tcl_AppendObjToObj(path, shlibext);
#ifndef __CYGWIN__
Tcl_AppendToObj(path, pqSuffixes[j], -1);
#endif
Tcl_IncrRefCount(path);
/* Try to load a client library and resolve symbols within it. */
Tcl_ResetResult(interp);
status = Tcl_LoadFile(interp, path, pqSymbolNames, 0,
&pqStubsTable, &handle);
Tcl_DecrRefCount(path);
}
}
/*
* Either we've successfully loaded a library (status == TCL_OK),
* or we've run out of library names (in which case status==TCL_ERROR
* and the error message reflects the last unsuccessful load attempt).
*/
Tcl_DecrRefCount(shlibext);
if (status != TCL_OK) {
return NULL;
}
return handle;
}
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