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Copy pathVariable.c
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962 lines (848 loc) · 32.7 KB
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//-----------------------------------------------------------------------------
// Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
//
// Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
//
// Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
// Canada. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Variable.c
// Defines Python types for Oracle variables.
//-----------------------------------------------------------------------------
#include "ObjectType.c"
//-----------------------------------------------------------------------------
// define structure common to all variables
//-----------------------------------------------------------------------------
typedef struct {
PyObject_HEAD
dpiVar *handle;
dpiData *data;
udt_Connection *connection;
PyObject *inConverter;
PyObject *outConverter;
udt_ObjectType *objectType;
uint32_t allocatedElements;
uint32_t size;
uint32_t bufferSize;
int isArray;
struct _udt_VariableType *type;
} udt_Variable;
//-----------------------------------------------------------------------------
// define function types for the common actions that take place on a variable
//-----------------------------------------------------------------------------
typedef int (*SetValueProc)(udt_Variable*, uint32_t, dpiData*, PyObject*);
typedef PyObject * (*GetValueProc)(udt_Variable*, dpiData*);
//-----------------------------------------------------------------------------
// define structure for the common actions that take place on a variable
//-----------------------------------------------------------------------------
typedef struct _udt_VariableType {
SetValueProc setValueProc;
GetValueProc getValueProc;
PyTypeObject *pythonType;
dpiOracleTypeNum oracleTypeNum;
dpiNativeTypeNum nativeTypeNum;
uint32_t size;
} udt_VariableType;
//-----------------------------------------------------------------------------
// Declaration of common variable functions.
//-----------------------------------------------------------------------------
static void Variable_Free(udt_Variable *);
static int Variable_SetValueBytes(udt_Variable *, uint32_t, dpiData *,
PyObject *);
static PyObject *Variable_Repr(udt_Variable *);
static PyObject *Variable_ExternalCopy(udt_Variable *, PyObject *);
static PyObject *Variable_ExternalSetValue(udt_Variable *, PyObject *);
static PyObject *Variable_ExternalGetValue(udt_Variable *, PyObject *,
PyObject *);
static PyObject *Variable_ExternalGetActualElements(udt_Variable*, void*);
static PyObject *Variable_ExternalGetValues(udt_Variable*, void*);
//-----------------------------------------------------------------------------
// declaration of members for variables
//-----------------------------------------------------------------------------
static PyMemberDef g_VariableMembers[] = {
{ "bufferSize", T_INT, offsetof(udt_Variable, bufferSize), READONLY },
{ "inconverter", T_OBJECT, offsetof(udt_Variable, inConverter), 0 },
{ "numElements", T_INT, offsetof(udt_Variable, allocatedElements),
READONLY },
{ "outconverter", T_OBJECT, offsetof(udt_Variable, outConverter), 0 },
{ "size", T_INT, offsetof(udt_Variable, size), READONLY },
{ "type", T_OBJECT, offsetof(udt_Variable, objectType), READONLY },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of calculated members for variables
//-----------------------------------------------------------------------------
static PyGetSetDef g_VariableCalcMembers[] = {
{ "actualElements", (getter) Variable_ExternalGetActualElements, 0, 0, 0 },
{ "values", (getter) Variable_ExternalGetValues, 0, 0, 0 },
{ NULL }
};
//-----------------------------------------------------------------------------
// declaration of methods for variables
//-----------------------------------------------------------------------------
static PyMethodDef g_VariableMethods[] = {
{ "copy", (PyCFunction) Variable_ExternalCopy, METH_VARARGS },
{ "setvalue", (PyCFunction) Variable_ExternalSetValue, METH_VARARGS },
{ "getvalue", (PyCFunction) Variable_ExternalGetValue,
METH_VARARGS | METH_KEYWORDS },
{ NULL }
};
#include "BooleanVar.c"
#include "StringVar.c"
#include "LongVar.c"
#include "NumberVar.c"
#include "DateTimeVar.c"
#include "LobVar.c"
#include "CursorVar.c"
#include "ObjectVar.c"
#include "IntervalVar.c"
//-----------------------------------------------------------------------------
// VarType_FromQueryInfo()
// Return a variable type given query metadata, or NULL indicating that the
// data indicated by the query metadata is not supported.
//-----------------------------------------------------------------------------
static udt_VariableType *VarType_FromQueryInfo(dpiQueryInfo *info)
{
char message[120];
switch (info->oracleTypeNum) {
case DPI_ORACLE_TYPE_VARCHAR:
return &vt_String;
case DPI_ORACLE_TYPE_NVARCHAR:
return &vt_NationalCharString;
case DPI_ORACLE_TYPE_CHAR:
return &vt_FixedChar;
case DPI_ORACLE_TYPE_NCHAR:
return &vt_FixedNationalChar;
case DPI_ORACLE_TYPE_ROWID:
return &vt_Rowid;
case DPI_ORACLE_TYPE_RAW:
return &vt_Binary;
case DPI_ORACLE_TYPE_NATIVE_FLOAT:
case DPI_ORACLE_TYPE_NATIVE_DOUBLE:
return &vt_NativeFloat;
case DPI_ORACLE_TYPE_NUMBER:
if (info->scale == 0 ||
(info->scale == -127 && info->precision == 0)) {
if (info->precision > 0 &&
info->precision <= DPI_MAX_INT64_PRECISION)
return &vt_NumberAsInteger;
return &vt_NumberAsLongInteger;
}
return &vt_NumberAsFloat;
case DPI_ORACLE_TYPE_NATIVE_INT:
return &vt_NativeInteger;
case DPI_ORACLE_TYPE_DATE:
return &vt_DateTime;
case DPI_ORACLE_TYPE_TIMESTAMP:
return &vt_Timestamp;
case DPI_ORACLE_TYPE_TIMESTAMP_TZ:
case DPI_ORACLE_TYPE_TIMESTAMP_LTZ:
return &vt_TimestampLTZ;
case DPI_ORACLE_TYPE_INTERVAL_DS:
return &vt_Interval;
case DPI_ORACLE_TYPE_CLOB:
return &vt_CLOB;
case DPI_ORACLE_TYPE_NCLOB:
return &vt_NCLOB;
case DPI_ORACLE_TYPE_BLOB:
return &vt_BLOB;
case DPI_ORACLE_TYPE_BFILE:
return &vt_BFILE;
case DPI_ORACLE_TYPE_STMT:
return &vt_Cursor;
case DPI_ORACLE_TYPE_OBJECT:
return &vt_Object;
case DPI_ORACLE_TYPE_LONG_VARCHAR:
return &vt_LongString;
case DPI_ORACLE_TYPE_LONG_RAW:
return &vt_LongBinary;
default:
sprintf(message, "Oracle type %d not supported.",
info->oracleTypeNum);
PyErr_SetString(g_NotSupportedErrorException, message);
return NULL;
}
}
//-----------------------------------------------------------------------------
// Variable_New()
// Allocate a new variable.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_New(udt_Cursor *cursor, uint32_t numElements,
udt_VariableType *type, uint32_t size, int isArray,
udt_ObjectType *objType)
{
dpiObjectType *typeHandle = NULL;
udt_Variable *self;
// attempt to allocate the object
self = (udt_Variable*) type->pythonType->tp_alloc(type->pythonType, 0);
if (!self)
return NULL;
// perform basic initialization
Py_INCREF(cursor->connection);
self->connection = cursor->connection;
if (objType) {
Py_INCREF(objType);
self->objectType = objType;
typeHandle = objType->handle;
}
if (numElements == 0)
numElements = 1;
self->allocatedElements = numElements;
self->type = type;
self->size = (size == 0) ? type->size : size;
self->isArray = isArray;
// acquire and initialize DPI variable
if (dpiConn_newVar(cursor->connection->handle, type->oracleTypeNum,
type->nativeTypeNum, numElements, self->size, 0, isArray,
typeHandle, &self->handle, &self->data) < 0) {
Error_RaiseAndReturnNull();
Py_DECREF(self);
return NULL;
}
// get buffer size for information
if (dpiVar_getSizeInBytes(self->handle, &self->bufferSize) < 0) {
Error_RaiseAndReturnNull();
Py_DECREF(self);
return NULL;
}
return self;
}
//-----------------------------------------------------------------------------
// Variable_Free()
// Free an existing variable.
//-----------------------------------------------------------------------------
static void Variable_Free(udt_Variable *self)
{
if (self->handle) {
Py_BEGIN_ALLOW_THREADS
dpiVar_release(self->handle);
Py_END_ALLOW_THREADS
self->handle = NULL;
}
Py_CLEAR(self->connection);
Py_CLEAR(self->inConverter);
Py_CLEAR(self->outConverter);
Py_CLEAR(self->objectType);
Py_TYPE(self)->tp_free((PyObject*) self);
}
//-----------------------------------------------------------------------------
// Variable_SetValueBytes()
// Transfer the value to DPI as bytes. The Python value is transformed into
// an object from which bytes can be extracted.
//-----------------------------------------------------------------------------
static int Variable_SetValueBytes(udt_Variable *var, uint32_t pos,
dpiData *data, PyObject *value)
{
dpiData *tempVarData, *sourceData;
dpiVar *tempVarHandle;
udt_Buffer buffer;
uint32_t i;
int status;
if (cxBuffer_FromObject(&buffer, value,
var->connection->encodingInfo.encoding) < 0)
return -1;
if (var->type->size > 0 && buffer.size > var->bufferSize) {
if (dpiConn_newVar(var->connection->handle, var->type->oracleTypeNum,
var->type->nativeTypeNum, var->allocatedElements,
buffer.size, 0, var->isArray, NULL, &tempVarHandle,
&tempVarData) < 0) {
cxBuffer_Clear(&buffer);
return Error_RaiseAndReturnInt();
}
for (i = 0; i < var->allocatedElements; i++) {
sourceData = &var->data[i];
if (i == pos || sourceData->isNull)
continue;
if (dpiVar_setFromBytes(tempVarHandle, i,
sourceData->value.asBytes.ptr,
sourceData->value.asBytes.length) < 0) {
cxBuffer_Clear(&buffer);
dpiVar_release(tempVarHandle);
return Error_RaiseAndReturnInt();
}
}
dpiVar_release(var->handle);
var->handle = tempVarHandle;
var->data = tempVarData;
var->size = buffer.numCharacters;
var->bufferSize = buffer.size;
}
status = dpiVar_setFromBytes(var->handle, pos, buffer.ptr, buffer.size);
cxBuffer_Clear(&buffer);
if (status < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Variable_Check()
// Returns a boolean indicating if the object is a variable.
//-----------------------------------------------------------------------------
static int Variable_Check(PyObject *object)
{
PyTypeObject *objectType = Py_TYPE(object);
return (objectType == &g_CursorVarType ||
objectType == &g_DateTimeVarType ||
objectType == &g_BFILEVarType ||
objectType == &g_BLOBVarType ||
objectType == &g_CLOBVarType ||
objectType == &g_LongStringVarType ||
objectType == &g_LongBinaryVarType ||
objectType == &g_NumberVarType ||
objectType == &g_StringVarType ||
objectType == &g_FixedCharVarType ||
objectType == &g_NCLOBVarType ||
objectType == &g_NCharVarType ||
objectType == &g_FixedNCharVarType ||
objectType == &g_RowidVarType ||
objectType == &g_BinaryVarType ||
objectType == &g_TimestampVarType ||
objectType == &g_IntervalVarType ||
objectType == &g_ObjectVarType ||
objectType == &g_BooleanVarType ||
objectType == &g_NativeFloatVarType ||
objectType == &g_NativeIntVarType);
}
//-----------------------------------------------------------------------------
// Variable_TypeByPythonType()
// Return a variable type given a Python type object or NULL if the Python
// type does not have a corresponding variable type.
//-----------------------------------------------------------------------------
static udt_VariableType *Variable_TypeByPythonType(udt_Cursor* cursor,
PyObject* type)
{
if (type == (PyObject*) &g_StringVarType)
return &vt_String;
if (type == (PyObject*) cxString_Type)
return &vt_String;
if (type == (PyObject*) &g_FixedCharVarType)
return &vt_FixedChar;
if (type == (PyObject*) &g_NCharVarType)
return &vt_NationalCharString;
#if PY_MAJOR_VERSION < 3
if (type == (PyObject*) &PyUnicode_Type)
return &vt_NationalCharString;
#endif
if (type == (PyObject*) &g_FixedNCharVarType)
return &vt_FixedNationalChar;
if (type == (PyObject*) &g_NCLOBVarType)
return &vt_NCLOB;
if (type == (PyObject*) &g_RowidVarType)
return &vt_Rowid;
if (type == (PyObject*) &g_BinaryVarType)
return &vt_Binary;
if (type == (PyObject*) &cxBinary_Type)
return &vt_Binary;
if (type == (PyObject*) &g_LongStringVarType)
return &vt_LongString;
if (type == (PyObject*) &g_LongBinaryVarType)
return &vt_LongBinary;
if (type == (PyObject*) &g_BFILEVarType)
return &vt_BFILE;
if (type == (PyObject*) &g_BLOBVarType)
return &vt_BLOB;
if (type == (PyObject*) &g_CLOBVarType)
return &vt_CLOB;
if (type == (PyObject*) &g_NumberVarType)
return &vt_NumberAsFloat;
if (type == (PyObject*) &PyFloat_Type)
return &vt_NumberAsFloat;
#if PY_MAJOR_VERSION < 3
if (type == (PyObject*) &PyInt_Type)
return &vt_NumberAsInteger;
#endif
if (type == (PyObject*) &PyLong_Type)
return &vt_NumberAsLongInteger;
if (type == (PyObject*) g_DecimalType)
return &vt_NumberAsDecimal;
if (type == (PyObject*) &g_BooleanVarType)
return &vt_Boolean;
if (type == (PyObject*) &PyBool_Type)
return &vt_Boolean;
if (type == (PyObject*) &g_DateTimeVarType)
return &vt_DateTime;
if (type == (PyObject*) PyDateTimeAPI->DateType)
return &vt_Date;
if (type == (PyObject*) PyDateTimeAPI->DateTimeType)
return &vt_DateTime;
if (type == (PyObject*) &g_IntervalVarType)
return &vt_Interval;
if (type == (PyObject*) PyDateTimeAPI->DeltaType)
return &vt_Interval;
if (type == (PyObject*) &g_TimestampVarType)
return &vt_Timestamp;
if (type == (PyObject*) &g_CursorVarType)
return &vt_Cursor;
if (type == (PyObject*) &g_NativeFloatVarType)
return &vt_NativeFloat;
if (type == (PyObject*) &g_NativeIntVarType)
return &vt_NativeInteger;
if (type == (PyObject*) &g_ObjectVarType)
return &vt_Object;
if (type == (PyObject*) &g_ObjectType)
return &vt_Object;
PyErr_SetString(g_NotSupportedErrorException,
"Variable_TypeByPythonType(): unhandled data type");
return NULL;
}
//-----------------------------------------------------------------------------
// Variable_TypeByValue()
// Return a variable type given a Python object or NULL if the Python
// object does not have a corresponding variable type.
//-----------------------------------------------------------------------------
static udt_VariableType *Variable_TypeByValue(PyObject* value, uint32_t* size,
uint32_t *numElements)
{
udt_VariableType *varType;
PyObject *elementValue;
char buffer[200];
int i, result;
// handle scalars
if (value == Py_None) {
*size = 1;
return &vt_String;
}
if (cxString_Check(value)) {
*size = (uint32_t) cxString_GetSize(value);
return &vt_String;
}
if (PyBool_Check(value))
return &vt_Boolean;
#if PY_MAJOR_VERSION < 3
if (PyUnicode_Check(value)) {
*size = (uint32_t) PyUnicode_GET_SIZE(value);
return &vt_NationalCharString;
}
if (PyInt_Check(value))
return &vt_NumberAsInteger;
#else
if (PyBytes_Check(value)) {
*size = (uint32_t) PyBytes_GET_SIZE(value);
return &vt_Binary;
}
#endif
if (PyLong_Check(value))
return &vt_NumberAsLongInteger;
if (PyFloat_Check(value))
return &vt_NumberAsFloat;
if (cxBinary_Check(value)) {
udt_Buffer temp;
if (cxBuffer_FromObject(&temp, value, NULL) < 0)
return NULL;
*size = temp.size;
cxBuffer_Clear(&temp);
return &vt_Binary;
}
if (PyDateTime_Check(value))
return &vt_DateTime;
if (PyDate_Check(value))
return &vt_DateTime;
if (PyDelta_Check(value))
return &vt_Interval;
result = PyObject_IsInstance(value, (PyObject*) &g_CursorType);
if (result < 0)
return NULL;
if (result)
return &vt_Cursor;
if (Py_TYPE(value) == g_DecimalType)
return &vt_NumberAsDecimal;
if (Py_TYPE(value) == &g_ObjectType)
return &vt_Object;
// handle arrays
if (PyList_Check(value)) {
elementValue = Py_None;
for (i = 0; i < PyList_GET_SIZE(value); i++) {
elementValue = PyList_GET_ITEM(value, i);
if (elementValue != Py_None)
break;
}
varType = Variable_TypeByValue(elementValue, size, numElements);
if (!varType)
return NULL;
*numElements = (uint32_t) PyList_GET_SIZE(value);
*size = varType->size;
return varType;
}
sprintf(buffer, "Variable_TypeByValue(): unhandled data type %.*s", 150,
Py_TYPE(value)->tp_name);
PyErr_SetString(g_NotSupportedErrorException, buffer);
return NULL;
}
//-----------------------------------------------------------------------------
// Variable_DefaultNewByValue()
// Default method for determining the type of variable to use for the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_DefaultNewByValue(udt_Cursor *cursor,
PyObject *value, uint32_t numElements)
{
udt_ObjectType *objType = NULL;
udt_VariableType *varType;
uint32_t size = 0;
udt_Object *obj;
varType = Variable_TypeByValue(value, &size, &numElements);
if (!varType)
return NULL;
if (varType == &vt_Object) {
obj = (udt_Object*) value;
objType = obj->objectType;
}
return Variable_New(cursor, numElements, varType, size,
PyList_Check(value), objType);
}
//-----------------------------------------------------------------------------
// Variable_NewByInputTypeHandler()
// Allocate a new variable by looking at the type of the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByInputTypeHandler(udt_Cursor *cursor,
PyObject *inputTypeHandler, PyObject *value, uint32_t numElements)
{
PyObject *var;
var = PyObject_CallFunction(inputTypeHandler, "OOi", cursor, value,
numElements);
if (!var)
return NULL;
if (var != Py_None) {
if (!Variable_Check(var)) {
Py_DECREF(var);
PyErr_SetString(PyExc_TypeError,
"expecting variable from input type handler");
return NULL;
}
return (udt_Variable*) var;
}
Py_DECREF(var);
return Variable_DefaultNewByValue(cursor, value, numElements);
}
//-----------------------------------------------------------------------------
// Variable_NewByValue()
// Allocate a new variable by looking at the type of the data.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByValue(udt_Cursor *cursor, PyObject *value,
uint32_t numElements)
{
if (cursor->inputTypeHandler && cursor->inputTypeHandler != Py_None)
return Variable_NewByInputTypeHandler(cursor, cursor->inputTypeHandler,
value, numElements);
if (cursor->connection->inputTypeHandler &&
cursor->connection->inputTypeHandler != Py_None)
return Variable_NewByInputTypeHandler(cursor,
cursor->connection->inputTypeHandler, value, numElements);
return Variable_DefaultNewByValue(cursor, value, numElements);
}
//-----------------------------------------------------------------------------
// Variable_NewArrayByType()
// Allocate a new PL/SQL array by looking at the Python data type.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewArrayByType(udt_Cursor *cursor,
PyObject *value)
{
PyObject *typeObj, *numElementsObj;
udt_VariableType *varType;
uint32_t numElements;
if (PyList_GET_SIZE(value) != 2) {
PyErr_SetString(g_ProgrammingErrorException,
"expecting an array of two elements [type, numelems]");
return NULL;
}
typeObj = PyList_GET_ITEM(value, 0);
numElementsObj = PyList_GET_ITEM(value, 1);
if (!PyInt_Check(numElementsObj)) {
PyErr_SetString(g_ProgrammingErrorException,
"number of elements must be an integer");
return NULL;
}
varType = Variable_TypeByPythonType(cursor, typeObj);
if (!varType)
return NULL;
numElements = PyInt_AsLong(numElementsObj);
if (PyErr_Occurred())
return NULL;
return Variable_New(cursor, numElements, varType, varType->size, 1, NULL);
}
//-----------------------------------------------------------------------------
// Variable_NewByType()
// Allocate a new variable by looking at the Python data type.
//-----------------------------------------------------------------------------
static udt_Variable *Variable_NewByType(udt_Cursor *cursor, PyObject *value,
uint32_t numElements)
{
udt_VariableType *varType;
int size;
// passing an integer is assumed to be a string
if (PyInt_Check(value)) {
size = PyInt_AsLong(value);
if (PyErr_Occurred())
return NULL;
varType = &vt_String;
return Variable_New(cursor, numElements, varType, size, 0, NULL);
}
// passing an array of two elements to define an array
if (PyList_Check(value))
return Variable_NewArrayByType(cursor, value);
// handle directly bound variables
if (Variable_Check(value)) {
Py_INCREF(value);
return (udt_Variable*) value;
}
// everything else ought to be a Python type
varType = Variable_TypeByPythonType(cursor, value);
if (!varType)
return NULL;
return Variable_New(cursor, numElements, varType, varType->size, 0, NULL);
}
//-----------------------------------------------------------------------------
// Variable_Bind()
// Allocate a variable and bind it to the given statement.
//-----------------------------------------------------------------------------
static int Variable_Bind(udt_Variable *var, udt_Cursor *cursor, PyObject *name,
uint32_t pos)
{
udt_Buffer nameBuffer;
int status;
// perform the bind
if (name) {
if (cxBuffer_FromObject(&nameBuffer, name,
cursor->connection->encodingInfo.encoding) < 0)
return -1;
status = dpiStmt_bindByName(cursor->handle, (char*) nameBuffer.ptr,
nameBuffer.size, var->handle);
cxBuffer_Clear(&nameBuffer);
} else {
status = dpiStmt_bindByPos(cursor->handle, pos, var->handle);
}
if (status < 0)
return Error_RaiseAndReturnInt();
return 0;
}
//-----------------------------------------------------------------------------
// Variable_GetSingleValue()
// Return the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetSingleValue(udt_Variable *var, uint32_t arrayPos)
{
PyObject *value, *result;
dpiData *data;
data = &var->data[arrayPos];
if (data->isNull)
Py_RETURN_NONE;
value = (*var->type->getValueProc)(var, data);
if (value && var->outConverter && var->outConverter != Py_None) {
result = PyObject_CallFunctionObjArgs(var->outConverter, value, NULL);
Py_DECREF(value);
return result;
}
return value;
}
//-----------------------------------------------------------------------------
// Variable_GetArrayValue()
// Return the value of the variable as an array.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetArrayValue(udt_Variable *var,
uint32_t numElements)
{
PyObject *value, *singleValue;
uint32_t i;
value = PyList_New(numElements);
if (!value)
return NULL;
for (i = 0; i < numElements; i++) {
singleValue = Variable_GetSingleValue(var, i);
if (!singleValue) {
Py_DECREF(value);
return NULL;
}
PyList_SET_ITEM(value, i, singleValue);
}
return value;
}
//-----------------------------------------------------------------------------
// Variable_GetValue()
// Return the value of the variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_GetValue(udt_Variable *var, uint32_t arrayPos)
{
uint32_t numElements;
if (var->isArray) {
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return Variable_GetArrayValue(var, numElements);
}
return Variable_GetSingleValue(var, arrayPos);
}
//-----------------------------------------------------------------------------
// Variable_SetSingleValue()
// Set a single value in the variable.
//-----------------------------------------------------------------------------
static int Variable_SetSingleValue(udt_Variable *var, uint32_t arrayPos,
PyObject *value)
{
PyObject *convertedValue = NULL;
int result = 0;
dpiData *data;
// convert value, if necessary
if (var->inConverter && var->inConverter != Py_None) {
convertedValue = PyObject_CallFunctionObjArgs(var->inConverter, value,
NULL);
if (!convertedValue)
return -1;
value = convertedValue;
}
// set up for transformation from Python to value expected by DPI
data = &var->data[arrayPos];
data->isNull = (value == Py_None);
if (!data->isNull)
result = (*var->type->setValueProc)(var, arrayPos, data, value);
Py_XDECREF(convertedValue);
return result;
}
//-----------------------------------------------------------------------------
// Variable_SetArrayValue()
// Set all of the array values for the variable.
//-----------------------------------------------------------------------------
static int Variable_SetArrayValue(udt_Variable *var, PyObject *value)
{
uint32_t numElements, i;
// ensure we have an array to set
if (!PyList_Check(value)) {
PyErr_SetString(PyExc_TypeError, "expecting array data");
return -1;
}
// set the number of actual elements
numElements = (uint32_t) PyList_GET_SIZE(value);
if (dpiVar_setNumElementsInArray(var->handle, numElements) < 0)
return Error_RaiseAndReturnInt();
// set all of the values
for (i = 0; i < numElements; i++) {
if (Variable_SetSingleValue(var, i, PyList_GET_ITEM(value, i)) < 0)
return -1;
}
return 0;
}
//-----------------------------------------------------------------------------
// Variable_SetValue()
// Set the value of the variable.
//-----------------------------------------------------------------------------
static int Variable_SetValue(udt_Variable *var, uint32_t arrayPos,
PyObject *value)
{
if (var->isArray) {
if (arrayPos > 0) {
PyErr_SetString(g_NotSupportedErrorException,
"arrays of arrays are not supported by the OCI");
return -1;
}
return Variable_SetArrayValue(var, value);
}
return Variable_SetSingleValue(var, arrayPos, value);
}
//-----------------------------------------------------------------------------
// Variable_ExternalCopy()
// Copy the contents of the source variable to the destination variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalCopy(udt_Variable *targetVar, PyObject *args)
{
uint32_t sourcePos, targetPos;
udt_Variable *sourceVar;
if (!PyArg_ParseTuple(args, "Oii", &sourceVar, &sourcePos, &targetPos))
return NULL;
if (Py_TYPE(targetVar) != Py_TYPE(sourceVar)) {
PyErr_SetString(g_ProgrammingErrorException,
"source and target variable type must match");
return NULL;
}
if (dpiVar_copyData(targetVar->handle, targetPos, sourceVar->handle,
sourcePos) < 0)
return Error_RaiseAndReturnNull();
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Variable_ExternalSetValue()
// Set the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalSetValue(udt_Variable *var, PyObject *args)
{
PyObject *value;
uint32_t pos;
if (!PyArg_ParseTuple(args, "iO", &pos, &value))
return NULL;
if (Variable_SetValue(var, pos, value) < 0)
return NULL;
Py_RETURN_NONE;
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetValue()
// Return the value of the variable at the given position.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetValue(udt_Variable *var, PyObject *args,
PyObject *keywordArgs)
{
static char *keywordList[] = { "pos", NULL };
uint32_t pos = 0;
if (!PyArg_ParseTupleAndKeywords(args, keywordArgs, "|i", keywordList,
&pos))
return NULL;
return Variable_GetValue(var, pos);
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetActualElements()
// Return the values of the variable at all positions as a list.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetActualElements(udt_Variable *var,
void *unused)
{
uint32_t numElements;
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return PyInt_FromLong(numElements);
}
//-----------------------------------------------------------------------------
// Variable_ExternalGetValues()
// Return the values of the variable at all positions as a list.
//-----------------------------------------------------------------------------
static PyObject *Variable_ExternalGetValues(udt_Variable *var, void *unused)
{
uint32_t numElements;
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
return Variable_GetArrayValue(var, numElements);
}
//-----------------------------------------------------------------------------
// Variable_Repr()
// Return a string representation of the variable.
//-----------------------------------------------------------------------------
static PyObject *Variable_Repr(udt_Variable *var)
{
PyObject *value, *module, *name, *result, *format, *formatArgs;
uint32_t numElements;
if (var->isArray) {
if (dpiVar_getNumElementsInArray(var->handle, &numElements) < 0)
return Error_RaiseAndReturnNull();
value = Variable_GetArrayValue(var, numElements);
} else if (var->allocatedElements == 1)
value = Variable_GetSingleValue(var, 0);
else value = Variable_GetArrayValue(var, var->allocatedElements);
if (!value)
return NULL;
format = cxString_FromAscii("<%s.%s with value %r>");
if (!format) {
Py_DECREF(value);
return NULL;
}
if (GetModuleAndName(Py_TYPE(var), &module, &name) < 0) {
Py_DECREF(value);
Py_DECREF(format);
return NULL;
}
formatArgs = PyTuple_Pack(3, module, name, value);
Py_DECREF(module);
Py_DECREF(name);
Py_DECREF(value);
if (!formatArgs) {
Py_DECREF(format);
return NULL;
}
result = cxString_Format(format, formatArgs);
Py_DECREF(format);
Py_DECREF(formatArgs);
return result;
}
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