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/*-------------------------------------------------------------------------
*
* pgtclId.c--
* useful routines to convert between strings and pointers
* Needed because everything in tcl is a string, but we want pointers
* to data structures
*
* ASSUMPTION: sizeof(long) >= sizeof(void*)
*
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclId.c,v 1.3 1996/11/11 12:14:45 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#include <stdlib.h>
#include <string.h>
#include <tcl.h>
#include "postgres.h"
#include "pgtclCmds.h"
#include "pgtclId.h"
/*
* Create the Id for a new connection and hash it
*/
void
PgSetConnectionId(Pg_clientData *cd, char *id, PGconn *conn)
{
Tcl_HashEntry *hent;
Pg_ConnectionId *connid;
int hnew;
connid = (Pg_ConnectionId *)ckalloc(sizeof(Pg_ConnectionId));
connid->conn = conn;
Tcl_InitHashTable(&(connid->res_hash), TCL_STRING_KEYS);
sprintf(connid->id, "pgc%ld", cd->dbh_count++);
strcpy(id, connid->id);
hent = Tcl_CreateHashEntry(&(cd->dbh_hash), connid->id, &hnew);
Tcl_SetHashValue(hent, (ClientData)connid);
}
/*
* Get back the connection from the Id
*/
PGconn *
PgGetConnectionId(Pg_clientData *cd, char *id)
{
Tcl_HashEntry *hent;
Pg_ConnectionId *connid;
hent = Tcl_FindHashEntry(&(cd->dbh_hash), id);
if(hent == NULL) {
return (PGconn *)NULL;
}
connid = (Pg_ConnectionId *)Tcl_GetHashValue(hent);
return connid->conn;
}
/*
* Remove a connection Id from the hash table and
* close all portals the user forgot.
*/
void
PgDelConnectionId(Pg_clientData *cd, char *id)
{
Tcl_HashEntry *hent;
Tcl_HashEntry *hent2;
Tcl_HashEntry *hent3;
Tcl_HashSearch hsearch;
Pg_ConnectionId *connid;
Pg_ResultId *resid;
hent = Tcl_FindHashEntry(&(cd->dbh_hash), id);
if(hent == NULL) {
return;
}
connid = (Pg_ConnectionId *)Tcl_GetHashValue(hent);
hent2 = Tcl_FirstHashEntry(&(connid->res_hash), &hsearch);
while(hent2 != NULL) {
resid = (Pg_ResultId *)Tcl_GetHashValue(hent2);
PQclear(resid->result);
hent3 = Tcl_FindHashEntry(&(cd->res_hash), resid->id);
if(hent3 != NULL) {
Tcl_DeleteHashEntry(hent3);
}
ckfree(resid);
hent2 = Tcl_NextHashEntry(&hsearch);
}
Tcl_DeleteHashTable(&(connid->res_hash));
Tcl_DeleteHashEntry(hent);
ckfree(connid);
}
/*
* Create a new result Id and hash it
*/
void
PgSetResultId(Pg_clientData *cd, char *id, char *connid_c, PGresult *res)
{
Tcl_HashEntry *hent;
Pg_ConnectionId *connid;
Pg_ResultId *resid;
int hnew;
hent = Tcl_FindHashEntry(&(cd->dbh_hash), connid_c);
if(hent == NULL) {
connid = NULL;
} else {
connid = (Pg_ConnectionId *)Tcl_GetHashValue(hent);
}
resid = (Pg_ResultId *)ckalloc(sizeof(Pg_ResultId));
resid->result = res;
resid->connection = connid;
sprintf(resid->id, "pgr%ld", cd->res_count++);
strcpy(id, resid->id);
hent = Tcl_CreateHashEntry(&(cd->res_hash), resid->id, &hnew);
Tcl_SetHashValue(hent, (ClientData)resid);
if(connid != NULL) {
hent = Tcl_CreateHashEntry(&(connid->res_hash), resid->id, &hnew);
Tcl_SetHashValue(hent, (ClientData)resid);
}
}
/*
* Get back the result pointer from the Id
*/
PGresult *
PgGetResultId(Pg_clientData *cd, char *id)
{
Tcl_HashEntry *hent;
Pg_ResultId *resid;
hent = Tcl_FindHashEntry(&(cd->res_hash), id);
if(hent == NULL) {
return (PGresult *)NULL;
}
resid = (Pg_ResultId *)Tcl_GetHashValue(hent);
return resid->result;
}
/*
* Remove a result Id from the hash tables
*/
void
PgDelResultId(Pg_clientData *cd, char *id)
{
Tcl_HashEntry *hent;
Tcl_HashEntry *hent2;
Pg_ResultId *resid;
hent = Tcl_FindHashEntry(&(cd->res_hash), id);
if(hent == NULL) {
return;
}
resid = (Pg_ResultId *)Tcl_GetHashValue(hent);
if (resid->connection != NULL) {
hent2 = Tcl_FindHashEntry(&(resid->connection->res_hash), id);
if(hent2 != NULL) {
Tcl_DeleteHashEntry(hent2);
}
}
Tcl_DeleteHashEntry(hent);
ckfree(resid);
}
/*
* Get the connection Id from the result Id
*/
void
PgGetConnByResultId(Pg_clientData *cd, char *id, char *resid_c)
{
Tcl_HashEntry *hent;
Pg_ResultId *resid;
hent = Tcl_FindHashEntry(&(cd->res_hash), id);
if(hent == NULL) {
return;
}
resid = (Pg_ResultId *)Tcl_GetHashValue(hent);
if (resid->connection != NULL) {
strcpy(id, resid->connection->id);
}
}
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