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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.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// StringVar.c
// Defines the routines specific to the string type.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// String type
//-----------------------------------------------------------------------------
typedef struct {
Variable_HEAD
char *data;
} udt_StringVar;
//-----------------------------------------------------------------------------
// Declaration of string variable functions.
//-----------------------------------------------------------------------------
static int StringVar_Initialize(udt_StringVar*, udt_Cursor*);
static int StringVar_SetValue(udt_StringVar*, unsigned, PyObject*);
static PyObject *StringVar_GetValue(udt_StringVar*, unsigned);
static int StringVar_PostDefine(udt_StringVar*);
static ub4 StringVar_GetBufferSize(udt_StringVar*);
//-----------------------------------------------------------------------------
// Python type declarations
//-----------------------------------------------------------------------------
static PyTypeObject g_StringVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.STRING", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
static PyTypeObject g_NCharVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.NCHAR", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
static PyTypeObject g_FixedCharVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.FIXED_CHAR", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
static PyTypeObject g_FixedNCharVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.FIXED_NCHAR", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
static PyTypeObject g_RowidVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.ROWID", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
static PyTypeObject g_BinaryVarType = {
PyVarObject_HEAD_INIT(NULL, 0)
"cx_Oracle.BINARY", // tp_name
sizeof(udt_StringVar), // tp_basicsize
0, // tp_itemsize
0, // tp_dealloc
0, // tp_print
0, // tp_getattr
0, // tp_setattr
0, // tp_compare
0, // tp_repr
0, // tp_as_number
0, // tp_as_sequence
0, // tp_as_mapping
0, // tp_hash
0, // tp_call
0, // tp_str
0, // tp_getattro
0, // tp_setattro
0, // tp_as_buffer
Py_TPFLAGS_DEFAULT, // tp_flags
0 // tp_doc
};
//-----------------------------------------------------------------------------
// variable type declarations
//-----------------------------------------------------------------------------
static udt_VariableType vt_String = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) NULL,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) StringVar_GetBufferSize,
&g_StringVarType, // Python type
SQLT_CHR, // Oracle type
SQLCS_IMPLICIT, // charset form
4000, // element length (default)
1, // is character data
1, // is variable length
1, // can be copied
1 // can be in array
};
static udt_VariableType vt_NationalCharString = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) StringVar_PostDefine,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) StringVar_GetBufferSize,
&g_NCharVarType, // Python type
SQLT_CHR, // Oracle type
SQLCS_NCHAR, // charset form
4000, // element length (default)
1, // is character data
1, // is variable length
1, // can be copied
1 // can be in array
};
static udt_VariableType vt_FixedChar = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) NULL,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) StringVar_GetBufferSize,
&g_FixedCharVarType, // Python type
SQLT_AFC, // Oracle type
SQLCS_IMPLICIT, // charset form
2000, // element length (default)
1, // is character data
1, // is variable length
1, // can be copied
1 // can be in array
};
static udt_VariableType vt_FixedNationalChar = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) StringVar_PostDefine,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) StringVar_GetBufferSize,
&g_FixedNCharVarType, // Python type
SQLT_AFC, // Oracle type
SQLCS_NCHAR, // charset form
2000, // element length (default)
1, // is character data
1, // is variable length
1, // can be copied
1 // can be in array
};
static udt_VariableType vt_Rowid = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) NULL,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) StringVar_GetBufferSize,
&g_RowidVarType, // Python type
SQLT_CHR, // Oracle type
SQLCS_IMPLICIT, // charset form
18, // element length (default)
1, // is character data
0, // is variable length
1, // can be copied
1 // can be in array
};
static udt_VariableType vt_Binary = {
(InitializeProc) StringVar_Initialize,
(FinalizeProc) NULL,
(PreDefineProc) NULL,
(PostDefineProc) NULL,
(PostBindProc) NULL,
(PreFetchProc) NULL,
(IsNullProc) NULL,
(SetValueProc) StringVar_SetValue,
(GetValueProc) StringVar_GetValue,
(GetBufferSizeProc) NULL,
&g_BinaryVarType, // Python type
SQLT_BIN, // Oracle type
SQLCS_IMPLICIT, // charset form
4000, // element length (default)
0, // is character data
1, // is variable length
1, // can be copied
1 // can be in array
};
//-----------------------------------------------------------------------------
// StringVar_Initialize()
// Initialize the variable.
//-----------------------------------------------------------------------------
static int StringVar_Initialize(
udt_StringVar *var, // variable to initialize
udt_Cursor *cursor) // cursor to use
{
ub4 i;
var->actualLength = (ACTUAL_LENGTH_TYPE *)
PyMem_Malloc(var->allocatedElements * sizeof(ACTUAL_LENGTH_TYPE));
if (!var->actualLength) {
PyErr_NoMemory();
return -1;
}
for (i = 0; i < var->allocatedElements; i++)
var->actualLength[i] = 0;
return 0;
}
//-----------------------------------------------------------------------------
// StringVar_SetValue()
// Set the value of the variable.
//-----------------------------------------------------------------------------
static int StringVar_SetValue(
udt_StringVar *var, // variable to set value for
unsigned pos, // array position to set
PyObject *value) // value to set
{
udt_Buffer buffer;
char *encoding;
// determine which encoding should be used
if (var->type->charsetForm == SQLCS_NCHAR)
encoding = var->environment->nencoding;
else encoding = var->environment->encoding;
// populate the buffer and confirm the maximum size is not exceeded
if (cxBuffer_FromObject(&buffer, value, encoding) < 0)
return -1;
// ensure that the buffer is large enough
if (buffer.size > var->bufferSize) {
if (Variable_Resize( (udt_Variable*) var,
(unsigned) buffer.numCharacters) < 0) {
cxBuffer_Clear(&buffer);
return -1;
}
}
// keep a copy of the string
var->actualLength[pos] = (ACTUAL_LENGTH_TYPE) buffer.size;
if (buffer.size)
memcpy(var->data + var->bufferSize * pos, buffer.ptr, buffer.size);
cxBuffer_Clear(&buffer);
return 0;
}
//-----------------------------------------------------------------------------
// StringVar_GetValue()
// Returns the value stored at the given array position.
//-----------------------------------------------------------------------------
static PyObject *StringVar_GetValue(
udt_StringVar *var, // variable to determine value for
unsigned pos) // array position
{
char *data;
data = var->data + pos * var->bufferSize;
if (var->type == &vt_Binary)
return PyBytes_FromStringAndSize(data, var->actualLength[pos]);
if (var->type == &vt_FixedNationalChar
|| var->type == &vt_NationalCharString)
return PyUnicode_Decode(data, var->actualLength[pos],
var->environment->nencoding, NULL);
return cxString_FromEncodedString(data, var->actualLength[pos],
var->environment->encoding);
}
//-----------------------------------------------------------------------------
// StringVar_PostDefine()
// Set the character set information when values are fetched from this
// variable.
//-----------------------------------------------------------------------------
static int StringVar_PostDefine(
udt_StringVar *var) // variable to initialize
{
sword status;
status = OCIAttrSet(var->defineHandle, OCI_HTYPE_DEFINE,
&var->type->charsetForm, 0, OCI_ATTR_CHARSET_FORM,
var->environment->errorHandle);
if (Environment_CheckForError(var->environment, status,
"StringVar_PostDefine(): setting charset form") < 0)
return -1;
return 0;
}
//-----------------------------------------------------------------------------
// StringVar_GetBufferSize()
// Returns the buffer size to use for the variable.
//-----------------------------------------------------------------------------
static ub4 StringVar_GetBufferSize(
udt_StringVar* self) // variable to get buffer size for
{
if (self->type->isCharacterData)
return self->size * self->environment->maxBytesPerCharacter;
return self->size;
}
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