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mariadb/bdb/tcl/tcl_dbcursor.c
unknown ec6ae09161 Import changeset
2001-03-04 19:42:05 -05:00

744 lines
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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1999, 2000
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: tcl_dbcursor.c,v 11.26 2001/01/11 18:19:55 bostic Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <tcl.h>
#endif
#include "db_int.h"
#include "tcl_db.h"
/*
* Prototypes for procedures defined later in this file:
*/
static int tcl_DbcDup __P((Tcl_Interp *, int, Tcl_Obj * CONST*, DBC *));
static int tcl_DbcGet __P((Tcl_Interp *, int, Tcl_Obj * CONST*, DBC *));
static int tcl_DbcPut __P((Tcl_Interp *, int, Tcl_Obj * CONST*, DBC *));
/*
* PUBLIC: int dbc_Cmd __P((ClientData, Tcl_Interp *, int, Tcl_Obj * CONST*));
*
* dbc_cmd --
* Implements the cursor command.
*/
int
dbc_Cmd(clientData, interp, objc, objv)
ClientData clientData; /* Cursor handle */
Tcl_Interp *interp; /* Interpreter */
int objc; /* How many arguments? */
Tcl_Obj *CONST objv[]; /* The argument objects */
{
static char *dbccmds[] = {
"close",
"del",
"dup",
"get",
"put",
NULL
};
enum dbccmds {
DBCCLOSE,
DBCDELETE,
DBCDUP,
DBCGET,
DBCPUT
};
DBC *dbc;
DBTCL_INFO *dbip;
int cmdindex, result, ret;
Tcl_ResetResult(interp);
dbc = (DBC *)clientData;
dbip = _PtrToInfo((void *)dbc);
result = TCL_OK;
if (objc <= 1) {
Tcl_WrongNumArgs(interp, 1, objv, "command cmdargs");
return (TCL_ERROR);
}
if (dbc == NULL) {
Tcl_SetResult(interp, "NULL dbc pointer", TCL_STATIC);
return (TCL_ERROR);
}
if (dbip == NULL) {
Tcl_SetResult(interp, "NULL dbc info pointer", TCL_STATIC);
return (TCL_ERROR);
}
/*
* Get the command name index from the object based on the berkdbcmds
* defined above.
*/
if (Tcl_GetIndexFromObj(interp, objv[1], dbccmds, "command",
TCL_EXACT, &cmdindex) != TCL_OK)
return (IS_HELP(objv[1]));
switch ((enum dbccmds)cmdindex) {
case DBCCLOSE:
/*
* No args for this. Error if there are some.
*/
if (objc > 2) {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
return (TCL_ERROR);
}
_debug_check();
ret = dbc->c_close(dbc);
result = _ReturnSetup(interp, ret, "dbc close");
if (result == TCL_OK) {
(void)Tcl_DeleteCommand(interp, dbip->i_name);
_DeleteInfo(dbip);
}
break;
case DBCDELETE:
/*
* No args for this. Error if there are some.
*/
if (objc > 2) {
Tcl_WrongNumArgs(interp, 2, objv, NULL);
return (TCL_ERROR);
}
_debug_check();
ret = dbc->c_del(dbc, 0);
result = _ReturnSetup(interp, ret, "dbc delete");
break;
case DBCDUP:
result = tcl_DbcDup(interp, objc, objv, dbc);
break;
case DBCGET:
result = tcl_DbcGet(interp, objc, objv, dbc);
break;
case DBCPUT:
result = tcl_DbcPut(interp, objc, objv, dbc);
break;
}
return (result);
}
/*
* tcl_DbcPut --
*/
static int
tcl_DbcPut(interp, objc, objv, dbc)
Tcl_Interp *interp; /* Interpreter */
int objc; /* How many arguments? */
Tcl_Obj *CONST objv[]; /* The argument objects */
DBC *dbc; /* Cursor pointer */
{
static char *dbcutopts[] = {
"-after", "-before", "-current",
"-keyfirst", "-keylast", "-nodupdata",
"-partial",
NULL
};
enum dbcutopts {
DBCPUT_AFTER, DBCPUT_BEFORE, DBCPUT_CURRENT,
DBCPUT_KEYFIRST,DBCPUT_KEYLAST, DBCPUT_NODUPDATA,
DBCPUT_PART
};
DB *thisdbp;
DBT key, data;
DBTCL_INFO *dbcip, *dbip;
DBTYPE type;
Tcl_Obj **elemv, *res;
db_recno_t recno;
u_int32_t flag;
int elemc, i, itmp, optindex, result, ret;
result = TCL_OK;
flag = 0;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 2, objv, "?-args? ?key?");
return (TCL_ERROR);
}
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
/*
* Get the command name index from the object based on the options
* defined above.
*/
i = 2;
while (i < (objc - 1)) {
if (Tcl_GetIndexFromObj(interp, objv[i], dbcutopts, "option",
TCL_EXACT, &optindex) != TCL_OK) {
/*
* Reset the result so we don't get
* an errant error message if there is another error.
*/
if (IS_HELP(objv[i]) == TCL_OK) {
result = TCL_OK;
goto out;
}
Tcl_ResetResult(interp);
break;
}
i++;
switch ((enum dbcutopts)optindex) {
case DBCPUT_AFTER:
FLAG_CHECK(flag);
flag = DB_AFTER;
break;
case DBCPUT_BEFORE:
FLAG_CHECK(flag);
flag = DB_BEFORE;
break;
case DBCPUT_CURRENT:
FLAG_CHECK(flag);
flag = DB_CURRENT;
break;
case DBCPUT_KEYFIRST:
FLAG_CHECK(flag);
flag = DB_KEYFIRST;
break;
case DBCPUT_KEYLAST:
FLAG_CHECK(flag);
flag = DB_KEYLAST;
break;
case DBCPUT_NODUPDATA:
FLAG_CHECK(flag);
flag = DB_NODUPDATA;
break;
case DBCPUT_PART:
if (i > (objc - 2)) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-partial {offset length}?");
result = TCL_ERROR;
break;
}
/*
* Get sublist as {offset length}
*/
result = Tcl_ListObjGetElements(interp, objv[i++],
&elemc, &elemv);
if (elemc != 2) {
Tcl_SetResult(interp,
"List must be {offset length}", TCL_STATIC);
result = TCL_ERROR;
break;
}
data.flags |= DB_DBT_PARTIAL;
result = Tcl_GetIntFromObj(interp, elemv[0], &itmp);
data.doff = itmp;
if (result != TCL_OK)
break;
result = Tcl_GetIntFromObj(interp, elemv[1], &itmp);
data.dlen = itmp;
/*
* NOTE: We don't check result here because all we'd
* do is break anyway, and we are doing that. If you
* add code here, you WILL need to add the check
* for result. (See the check for save.doff, a few
* lines above and copy that.)
*/
}
if (result != TCL_OK)
break;
}
if (result != TCL_OK)
goto out;
/*
* We need to determine if we are a recno database or not. If we are,
* then key.data is a recno, not a string.
*/
dbcip = _PtrToInfo(dbc);
if (dbcip == NULL)
type = DB_UNKNOWN;
else {
dbip = dbcip->i_parent;
if (dbip == NULL) {
Tcl_SetResult(interp, "Cursor without parent database",
TCL_STATIC);
result = TCL_ERROR;
return (result);
}
thisdbp = dbip->i_dbp;
type = thisdbp->get_type(thisdbp);
}
/*
* When we get here, we better have:
* 1 arg if -after, -before or -current
* 2 args in all other cases
*/
if (flag == DB_AFTER || flag == DB_BEFORE || flag == DB_CURRENT) {
if (i != (objc - 1)) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-args? data");
result = TCL_ERROR;
goto out;
}
/*
* We want to get the key back, so we need to set
* up the location to get it back in.
*/
if (type == DB_RECNO || type == DB_QUEUE) {
recno = 0;
key.data = &recno;
key.size = sizeof(db_recno_t);
}
} else {
if (i != (objc - 2)) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-args? key data");
result = TCL_ERROR;
goto out;
}
if (type == DB_RECNO || type == DB_QUEUE) {
result = Tcl_GetIntFromObj(interp, objv[objc-2], &itmp);
recno = itmp;
if (result == TCL_OK) {
key.data = &recno;
key.size = sizeof(db_recno_t);
} else
return (result);
} else {
key.data = Tcl_GetByteArrayFromObj(objv[objc-2], &itmp);
key.size = itmp;
}
}
data.data = Tcl_GetByteArrayFromObj(objv[objc-1], &itmp);
data.size = itmp;
_debug_check();
ret = dbc->c_put(dbc, &key, &data, flag);
result = _ReturnSetup(interp, ret, "dbc put");
if (ret == 0 && (flag == DB_AFTER || flag == DB_BEFORE)
&& type == DB_RECNO) {
res = Tcl_NewIntObj(*(db_recno_t *)key.data);
Tcl_SetObjResult(interp, res);
}
out:
return (result);
}
/*
* tcl_dbc_get --
*/
static int
tcl_DbcGet(interp, objc, objv, dbc)
Tcl_Interp *interp; /* Interpreter */
int objc; /* How many arguments? */
Tcl_Obj *CONST objv[]; /* The argument objects */
DBC *dbc; /* Cursor pointer */
{
static char *dbcgetopts[] = {
"-current",
"-first",
"-get_both",
"-get_recno",
"-join_item",
"-last",
"-next",
"-nextdup",
"-nextnodup",
"-partial",
"-prev",
"-prevnodup",
"-rmw",
"-set",
"-set_range",
"-set_recno",
NULL
};
enum dbcgetopts {
DBCGET_CURRENT,
DBCGET_FIRST,
DBCGET_BOTH,
DBCGET_RECNO,
DBCGET_JOIN,
DBCGET_LAST,
DBCGET_NEXT,
DBCGET_NEXTDUP,
DBCGET_NEXTNODUP,
DBCGET_PART,
DBCGET_PREV,
DBCGET_PREVNODUP,
DBCGET_RMW,
DBCGET_SET,
DBCGET_SETRANGE,
DBCGET_SETRECNO
};
DB *thisdbp;
DBT key, data;
DBTCL_INFO *dbcip, *dbip;
DBTYPE type;
Tcl_Obj **elemv, *myobj, *retlist;
db_recno_t recno;
u_int32_t flag;
int elemc, i, itmp, optindex, result, ret;
result = TCL_OK;
flag = 0;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 2, objv, "?-args? ?key?");
return (TCL_ERROR);
}
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
/*
* Get the command name index from the object based on the options
* defined above.
*/
i = 2;
while (i < objc) {
if (Tcl_GetIndexFromObj(interp, objv[i], dbcgetopts,
"option", TCL_EXACT, &optindex) != TCL_OK) {
/*
* Reset the result so we don't get
* an errant error message if there is another error.
*/
if (IS_HELP(objv[i]) == TCL_OK) {
result = TCL_OK;
goto out;
}
Tcl_ResetResult(interp);
break;
}
i++;
switch ((enum dbcgetopts)optindex) {
case DBCGET_RMW:
flag |= DB_RMW;
break;
case DBCGET_CURRENT:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_CURRENT;
break;
case DBCGET_FIRST:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_FIRST;
break;
case DBCGET_LAST:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_LAST;
break;
case DBCGET_NEXT:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_NEXT;
break;
case DBCGET_PREV:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_PREV;
break;
case DBCGET_PREVNODUP:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_PREV_NODUP;
break;
case DBCGET_NEXTNODUP:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_NEXT_NODUP;
break;
case DBCGET_NEXTDUP:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_NEXT_DUP;
break;
case DBCGET_BOTH:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_GET_BOTH;
break;
case DBCGET_RECNO:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_GET_RECNO;
break;
case DBCGET_JOIN:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_JOIN_ITEM;
break;
case DBCGET_SET:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_SET;
break;
case DBCGET_SETRANGE:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_SET_RANGE;
break;
case DBCGET_SETRECNO:
FLAG_CHECK2(flag, DB_RMW);
flag |= DB_SET_RECNO;
break;
case DBCGET_PART:
if (i == objc) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-partial {offset length}?");
result = TCL_ERROR;
break;
}
/*
* Get sublist as {offset length}
*/
result = Tcl_ListObjGetElements(interp, objv[i++],
&elemc, &elemv);
if (elemc != 2) {
Tcl_SetResult(interp,
"List must be {offset length}", TCL_STATIC);
result = TCL_ERROR;
break;
}
data.flags |= DB_DBT_PARTIAL;
result = Tcl_GetIntFromObj(interp, elemv[0], &itmp);
data.doff = itmp;
if (result != TCL_OK)
break;
result = Tcl_GetIntFromObj(interp, elemv[1], &itmp);
data.dlen = itmp;
/*
* NOTE: We don't check result here because all we'd
* do is break anyway, and we are doing that. If you
* add code here, you WILL need to add the check
* for result. (See the check for save.doff, a few
* lines above and copy that.)
*/
break;
}
if (result != TCL_OK)
break;
}
if (result != TCL_OK)
goto out;
/*
* We need to determine if we are a recno database
* or not. If we are, then key.data is a recno, not
* a string.
*/
dbcip = _PtrToInfo(dbc);
if (dbcip == NULL)
type = DB_UNKNOWN;
else {
dbip = dbcip->i_parent;
if (dbip == NULL) {
Tcl_SetResult(interp, "Cursor without parent database",
TCL_STATIC);
result = TCL_ERROR;
goto out;
}
thisdbp = dbip->i_dbp;
type = thisdbp->get_type(thisdbp);
}
/*
* When we get here, we better have:
* 2 args, key and data if GET_BOTH was specified.
* 1 arg if -set, -set_range or -set_recno
* 0 in all other cases.
*/
if ((flag & DB_OPFLAGS_MASK) == DB_GET_BOTH) {
if (i != (objc - 2)) {
Tcl_WrongNumArgs(interp, 2, objv,
"?-args? -get_both key data");
result = TCL_ERROR;
goto out;
} else {
if (type == DB_RECNO || type == DB_QUEUE) {
result = Tcl_GetIntFromObj(
interp, objv[objc-2], &itmp);
recno = itmp;
if (result == TCL_OK) {
key.data = &recno;
key.size = sizeof(db_recno_t);
} else
goto out;
} else {
key.data = Tcl_GetByteArrayFromObj(
objv[objc - 2], &itmp);
key.size = itmp;
}
data.data =
Tcl_GetByteArrayFromObj(objv[objc - 1], &itmp);
data.size = itmp;
}
} else if ((flag & DB_OPFLAGS_MASK) == DB_SET ||
(flag & DB_OPFLAGS_MASK) == DB_SET_RANGE ||
(flag & DB_OPFLAGS_MASK) == DB_SET_RECNO) {
if (i != (objc - 1)) {
Tcl_WrongNumArgs(interp, 2, objv, "?-args? key");
result = TCL_ERROR;
goto out;
}
data.flags |= DB_DBT_MALLOC;
if ((flag & DB_OPFLAGS_MASK) == DB_SET_RECNO ||
type == DB_RECNO || type == DB_QUEUE) {
result = Tcl_GetIntFromObj(interp,
objv[objc - 1], (int *)&recno);
key.data = &recno;
key.size = sizeof(db_recno_t);
} else {
key.data =
Tcl_GetByteArrayFromObj(objv[objc - 1], &itmp);
key.size = itmp;
}
} else {
if (i != objc) {
Tcl_WrongNumArgs(interp, 2, objv, "?-args?");
result = TCL_ERROR;
goto out;
}
key.flags |= DB_DBT_MALLOC;
data.flags |= DB_DBT_MALLOC;
}
_debug_check();
ret = dbc->c_get(dbc, &key, &data, flag);
result = _ReturnSetup(interp, ret, "dbc get");
if (result == TCL_ERROR)
goto out;
retlist = Tcl_NewListObj(0, NULL);
if (ret == DB_NOTFOUND)
goto out1;
if ((flag & DB_OPFLAGS_MASK) == DB_GET_RECNO) {
recno = *((db_recno_t *)data.data);
myobj = Tcl_NewIntObj((int)recno);
result = Tcl_ListObjAppendElement(interp, retlist, myobj);
} else {
if ((type == DB_RECNO || type == DB_QUEUE) && key.data != NULL)
result = _SetListRecnoElem(interp, retlist,
*(db_recno_t *)key.data, data.data, data.size);
else
result = _SetListElem(interp, retlist,
key.data, key.size, data.data, data.size);
}
if (key.flags & DB_DBT_MALLOC)
__os_free(key.data, key.size);
if (data.flags & DB_DBT_MALLOC)
__os_free(data.data, data.size);
out1:
if (result == TCL_OK)
Tcl_SetObjResult(interp, retlist);
out:
return (result);
}
/*
* tcl_DbcDup --
*/
static int
tcl_DbcDup(interp, objc, objv, dbc)
Tcl_Interp *interp; /* Interpreter */
int objc; /* How many arguments? */
Tcl_Obj *CONST objv[]; /* The argument objects */
DBC *dbc; /* Cursor pointer */
{
static char *dbcdupopts[] = {
"-position",
NULL
};
enum dbcdupopts {
DBCDUP_POS
};
DB *thisdbp;
DBC *newdbc;
DBTCL_INFO *dbcip, *newdbcip, *dbip;
Tcl_Obj *res;
u_int32_t flag;
int i, optindex, result, ret;
char newname[MSG_SIZE];
result = TCL_OK;
flag = 0;
res = NULL;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 2, objv, "?-args?");
return (TCL_ERROR);
}
/*
* Get the command name index from the object based on the options
* defined above.
*/
i = 2;
while (i < objc) {
if (Tcl_GetIndexFromObj(interp, objv[i], dbcdupopts,
"option", TCL_EXACT, &optindex) != TCL_OK) {
/*
* Reset the result so we don't get
* an errant error message if there is another error.
*/
if (IS_HELP(objv[i]) == TCL_OK) {
result = TCL_OK;
goto out;
}
Tcl_ResetResult(interp);
break;
}
i++;
switch ((enum dbcdupopts)optindex) {
case DBCDUP_POS:
flag = DB_POSITION;
break;
}
if (result != TCL_OK)
break;
}
if (result != TCL_OK)
goto out;
/*
* We need to determine if we are a recno database
* or not. If we are, then key.data is a recno, not
* a string.
*/
dbcip = _PtrToInfo(dbc);
if (dbcip == NULL) {
Tcl_SetResult(interp, "Cursor without info structure",
TCL_STATIC);
result = TCL_ERROR;
goto out;
} else {
dbip = dbcip->i_parent;
if (dbip == NULL) {
Tcl_SetResult(interp, "Cursor without parent database",
TCL_STATIC);
result = TCL_ERROR;
goto out;
}
thisdbp = dbip->i_dbp;
}
/*
* Now duplicate the cursor. If successful, we need to create
* a new cursor command.
*/
snprintf(newname, sizeof(newname),
"%s.c%d", dbip->i_name, dbip->i_dbdbcid);
newdbcip = _NewInfo(interp, NULL, newname, I_DBC);
if (newdbcip != NULL) {
ret = dbc->c_dup(dbc, &newdbc, flag);
if (ret == 0) {
dbip->i_dbdbcid++;
newdbcip->i_parent = dbip;
Tcl_CreateObjCommand(interp, newname,
(Tcl_ObjCmdProc *)dbc_Cmd,
(ClientData)newdbc, NULL);
res = Tcl_NewStringObj(newname, strlen(newname));
_SetInfoData(newdbcip, newdbc);
Tcl_SetObjResult(interp, res);
} else {
result = _ReturnSetup(interp, ret, "db dup");
_DeleteInfo(newdbcip);
}
} else {
Tcl_SetResult(interp, "Could not set up info", TCL_STATIC);
result = TCL_ERROR;
}
out:
return (result);
}
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