--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Modules/_sqlite/cursor.c	Sat Apr 01 00:57:31 2006 +0000
@@ -0,0 +1,1067 @@
+/* cursor.c - the cursor type
+ *
+ * Copyright (C) 2004-2006 Gerhard Häring <gh@ghaering.de>
+ *
+ * This file is part of pysqlite.
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ */
+
+#include "cursor.h"
+#include "module.h"
+#include "util.h"
+#include "microprotocols.h"
+#include "prepare_protocol.h"
+
+/* used to decide wether to call PyInt_FromLong or PyLong_FromLongLong */
+#define INT32_MIN (-2147483647 - 1)
+#define INT32_MAX 2147483647
+
+PyObject* cursor_iternext(Cursor *self);
+
+static StatementKind detect_statement_type(char* statement)
+{
+    char buf[20];
+    char* src;
+    char* dst;
+
+    src = statement;
+    /* skip over whitepace */
+    while (*src == '\r' || *src == '\n' || *src == ' ' || *src == '\t') {
+        src++;
+    }
+
+    if (*src == 0)
+        return STATEMENT_INVALID;
+
+    dst = buf;
+    *dst = 0;
+    while (isalpha(*src) && dst - buf < sizeof(buf) - 2) {
+        *dst++ = tolower(*src++);
+    }
+
+    *dst = 0;
+
+    if (!strcmp(buf, "select")) {
+        return STATEMENT_SELECT;
+    } else if (!strcmp(buf, "insert")) {
+        return STATEMENT_INSERT;
+    } else if (!strcmp(buf, "update")) {
+        return STATEMENT_UPDATE;
+    } else if (!strcmp(buf, "delete")) {
+        return STATEMENT_DELETE;
+    } else if (!strcmp(buf, "replace")) {
+        return STATEMENT_REPLACE;
+    } else {
+        return STATEMENT_OTHER;
+    }
+}
+
+int cursor_init(Cursor* self, PyObject* args, PyObject* kwargs)
+{
+    Connection* connection;
+
+    if (!PyArg_ParseTuple(args, "O!", &ConnectionType, &connection))
+    {
+        return -1; 
+    }
+
+    Py_INCREF(connection);
+    self->connection = connection;
+    self->statement = NULL;
+    self->next_row = NULL;
+
+    self->row_cast_map = PyList_New(0);
+
+    Py_INCREF(Py_None);
+    self->description = Py_None;
+
+    Py_INCREF(Py_None);
+    self->lastrowid= Py_None;
+
+    self->arraysize = 1;
+
+    self->rowcount = PyInt_FromLong(-1L);
+
+    Py_INCREF(Py_None);
+    self->row_factory = Py_None;
+
+    if (!check_thread(self->connection)) {
+        return -1;
+    }
+
+    return 0;
+}
+
+void cursor_dealloc(Cursor* self)
+{
+    int rc;
+
+    /* Reset the statement if the user has not closed the cursor */
+    if (self->statement) {
+        rc = statement_reset(self->statement);
+        Py_DECREF(self->statement);
+    }
+
+    Py_XDECREF(self->connection);
+    Py_XDECREF(self->row_cast_map);
+    Py_XDECREF(self->description);
+    Py_XDECREF(self->lastrowid);
+    Py_XDECREF(self->rowcount);
+    Py_XDECREF(self->row_factory);
+    Py_XDECREF(self->next_row);
+
+    self->ob_type->tp_free((PyObject*)self);
+}
+
+void build_row_cast_map(Cursor* self)
+{
+    int i;
+    const char* type_start = (const char*)-1;
+    const char* pos;
+
+    const char* colname;
+    const char* decltype;
+    PyObject* py_decltype;
+    PyObject* converter;
+    PyObject* key;
+
+    if (!self->connection->detect_types) {
+        return;
+    }
+
+    Py_DECREF(self->row_cast_map);
+    self->row_cast_map = PyList_New(0);
+
+    for (i = 0; i < sqlite3_column_count(self->statement->st); i++) {
+        converter = NULL;
+
+        if (self->connection->detect_types | PARSE_COLNAMES) {
+            colname = sqlite3_column_name(self->statement->st, i);
+
+            for (pos = colname; *pos != 0; pos++) {
+                if (*pos == '[') {
+                    type_start = pos + 1;
+                } else if (*pos == ']' && type_start != (const char*)-1) {
+                    key = PyString_FromStringAndSize(type_start, pos - type_start);
+                    converter = PyDict_GetItem(converters, key);
+                    Py_DECREF(key);
+                    break;
+                }
+
+            }
+        }
+
+        if (!converter && self->connection->detect_types | PARSE_DECLTYPES) {
+            decltype = sqlite3_column_decltype(self->statement->st, i);
+            if (decltype) {
+                for (pos = decltype;;pos++) {
+                    if (*pos == ' ' || *pos == 0) {
+                        py_decltype = PyString_FromStringAndSize(decltype, pos - decltype);
+                        break;
+                    }
+                }
+
+                converter = PyDict_GetItem(converters, py_decltype);
+                Py_DECREF(py_decltype);
+            }
+        }
+
+        if (converter) {
+            PyList_Append(self->row_cast_map, converter);
+        } else {
+            PyList_Append(self->row_cast_map, Py_None);
+        }
+    }
+}
+
+int _bind_parameter(Cursor* self, int pos, PyObject* parameter)
+{
+    int rc = SQLITE_OK;
+    long longval;
+#ifdef HAVE_LONG_LONG
+    PY_LONG_LONG longlongval;
+#endif
+    const char* buffer;
+    char* string;
+    int buflen;
+    PyObject* stringval;
+
+    if (parameter == Py_None) {
+        rc = sqlite3_bind_null(self->statement->st, pos);
+    } else if (PyInt_Check(parameter)) {
+        longval = PyInt_AsLong(parameter);
+        rc = sqlite3_bind_int64(self->statement->st, pos, (sqlite_int64)longval);
+#ifdef HAVE_LONG_LONG
+    } else if (PyLong_Check(parameter)) {
+        longlongval = PyLong_AsLongLong(parameter);
+        /* in the overflow error case, longlongval is -1, and an exception is set */
+        rc = sqlite3_bind_int64(self->statement->st, pos, (sqlite_int64)longlongval);
+#endif
+    } else if (PyFloat_Check(parameter)) {
+        rc = sqlite3_bind_double(self->statement->st, pos, PyFloat_AsDouble(parameter));
+    } else if (PyBuffer_Check(parameter)) {
+        if (PyObject_AsCharBuffer(parameter, &buffer, &buflen) == 0) {
+            rc = sqlite3_bind_blob(self->statement->st, pos, buffer, buflen, SQLITE_TRANSIENT);
+        } else {
+            PyErr_SetString(PyExc_ValueError, "could not convert BLOB to buffer");
+            rc = -1;
+        }
+    } else if PyString_Check(parameter) {
+        string = PyString_AsString(parameter);
+        rc = sqlite3_bind_text(self->statement->st, pos, string, -1, SQLITE_TRANSIENT);
+    } else if PyUnicode_Check(parameter) {
+        stringval = PyUnicode_AsUTF8String(parameter);
+        string = PyString_AsString(stringval);
+        rc = sqlite3_bind_text(self->statement->st, pos, string, -1, SQLITE_TRANSIENT);
+        Py_DECREF(stringval);
+    } else {
+        rc = -1;
+    }
+
+    return rc;
+}
+
+PyObject* _build_column_name(const char* colname)
+{
+    const char* pos;
+
+    for (pos = colname;; pos++) {
+        if (*pos == 0 || *pos == ' ') {
+            return PyString_FromStringAndSize(colname, pos - colname);
+        }
+    }
+}
+
+PyObject* unicode_from_string(const char* val_str, int optimize)
+{
+    const char* check;
+    int is_ascii = 0;
+
+    if (optimize) {
+        is_ascii = 1;
+
+        check = val_str;
+        while (*check) {
+            if (*check & 0x80) {
+                is_ascii = 0;
+                break;
+            }
+
+            check++;
+        }
+    }
+
+    if (is_ascii) {
+        return PyString_FromString(val_str);
+    } else {
+        return PyUnicode_DecodeUTF8(val_str, strlen(val_str), NULL);
+    }
+}
+
+/*
+ * Returns a row from the currently active SQLite statement
+ *
+ * Precondidition:
+ * - sqlite3_step() has been called before and it returned SQLITE_ROW.
+ */
+PyObject* _fetch_one_row(Cursor* self)
+{
+    int i, numcols;
+    PyObject* row;
+    PyObject* item = NULL;
+    int coltype;
+    PY_LONG_LONG intval;
+    PyObject* converter;
+    PyObject* converted;
+    int nbytes;
+    PyObject* buffer;
+    void* raw_buffer;
+    const char* val_str;
+    char buf[200];
+
+    Py_BEGIN_ALLOW_THREADS
+    numcols = sqlite3_data_count(self->statement->st);
+    Py_END_ALLOW_THREADS
+
+    row = PyTuple_New(numcols);
+
+    for (i = 0; i < numcols; i++) {
+        if (self->connection->detect_types) {
+            converter = PyList_GetItem(self->row_cast_map, i);
+            if (!converter) {
+                converter = Py_None;
+            }
+        } else {
+            converter = Py_None;
+        }
+
+        if (converter != Py_None) {
+            val_str = (const char*)sqlite3_column_text(self->statement->st, i);
+            if (!val_str) {
+                Py_INCREF(Py_None);
+                converted = Py_None;
+            } else {
+                item = PyString_FromString(val_str);
+                converted = PyObject_CallFunction(converter, "O", item);
+                if (!converted) {
+                    /* TODO: have a way to log these errors */
+                    Py_INCREF(Py_None);
+                    converted = Py_None;
+                    PyErr_Clear();
+                }
+                Py_DECREF(item);
+            }
+        } else {
+            Py_BEGIN_ALLOW_THREADS
+            coltype = sqlite3_column_type(self->statement->st, i);
+            Py_END_ALLOW_THREADS
+            if (coltype == SQLITE_NULL) {
+                Py_INCREF(Py_None);
+                converted = Py_None;
+            } else if (coltype == SQLITE_INTEGER) {
+                intval = sqlite3_column_int64(self->statement->st, i);
+                if (intval < INT32_MIN || intval > INT32_MAX) {
+                    converted = PyLong_FromLongLong(intval);
+                } else {
+                    converted = PyInt_FromLong((long)intval);
+                }
+            } else if (coltype == SQLITE_FLOAT) {
+                converted = PyFloat_FromDouble(sqlite3_column_double(self->statement->st, i));
+            } else if (coltype == SQLITE_TEXT) {
+                val_str = (const char*)sqlite3_column_text(self->statement->st, i);
+                if ((self->connection->text_factory == (PyObject*)&PyUnicode_Type)
+                    || (self->connection->text_factory == OptimizedUnicode)) {
+
+                    converted = unicode_from_string(val_str,
+                        self->connection->text_factory == OptimizedUnicode ? 1 : 0);
+
+                    if (!converted) {
+                        PyOS_snprintf(buf, sizeof(buf) - 1, "Could not decode to UTF-8 column %s with text %s",
+                                    sqlite3_column_name(self->statement->st, i), val_str);
+                        PyErr_SetString(OperationalError, buf);
+                    }
+                } else if (self->connection->text_factory == (PyObject*)&PyString_Type) {
+                    converted = PyString_FromString(val_str);
+                } else {
+                    converted = PyObject_CallFunction(self->connection->text_factory, "s", val_str);
+                }
+            } else {
+                /* coltype == SQLITE_BLOB */
+                nbytes = sqlite3_column_bytes(self->statement->st, i);
+                buffer = PyBuffer_New(nbytes);
+                if (!buffer) {
+                    break;
+                }
+                if (PyObject_AsWriteBuffer(buffer, &raw_buffer, &nbytes)) {
+                    break;
+                }
+                memcpy(raw_buffer, sqlite3_column_blob(self->statement->st, i), nbytes);
+                converted = buffer;
+            }
+        }
+
+        PyTuple_SetItem(row, i, converted);
+    }
+
+    if (PyErr_Occurred()) {
+        Py_DECREF(row);
+        row = NULL;
+    }
+
+    return row;
+}
+
+PyObject* _query_execute(Cursor* self, int multiple, PyObject* args)
+{
+    PyObject* operation;
+    PyObject* operation_bytestr = NULL;
+    char* operation_cstr;
+    PyObject* parameters_list = NULL;
+    PyObject* parameters_iter = NULL;
+    PyObject* parameters = NULL;
+    int num_params;
+    int i;
+    int rc;
+    PyObject* func_args;
+    PyObject* result;
+    int numcols;
+    PY_LONG_LONG lastrowid;
+    int statement_type;
+    PyObject* descriptor;
+    PyObject* current_param;
+    PyObject* adapted;
+    PyObject* second_argument = NULL;
+    int num_params_needed;
+    const char* binding_name;
+    long rowcount = 0;
+
+    if (!check_thread(self->connection) || !check_connection(self->connection)) {
+        return NULL;
+    }
+
+    Py_XDECREF(self->next_row);
+    self->next_row = NULL;
+
+    if (multiple) {
+        /* executemany() */
+        if (!PyArg_ParseTuple(args, "OO", &operation, &second_argument)) {
+            return NULL; 
+        }
+
+        if (!PyString_Check(operation) && !PyUnicode_Check(operation)) {
+            PyErr_SetString(PyExc_ValueError, "operation parameter must be str or unicode");
+            return NULL;
+        }
+
+        if (PyIter_Check(second_argument)) {
+            /* iterator */
+            Py_INCREF(second_argument);
+            parameters_iter = second_argument;
+        } else {
+            /* sequence */
+            parameters_iter = PyObject_GetIter(second_argument);
+            if (PyErr_Occurred())
+            {
+                return NULL;
+            }
+        }
+    } else {
+        /* execute() */
+        if (!PyArg_ParseTuple(args, "O|O", &operation, &second_argument)) {
+            return NULL; 
+        }
+
+        if (!PyString_Check(operation) && !PyUnicode_Check(operation)) {
+            PyErr_SetString(PyExc_ValueError, "operation parameter must be str or unicode");
+            return NULL;
+        }
+
+        parameters_list = PyList_New(0);
+        if (!parameters_list) {
+            return NULL;
+        }
+
+        if (second_argument == NULL) {
+            second_argument = PyTuple_New(0);
+        } else {
+            Py_INCREF(second_argument);
+        }
+        PyList_Append(parameters_list, second_argument);
+        Py_DECREF(second_argument);
+
+        parameters_iter = PyObject_GetIter(parameters_list);
+    }
+
+    if (self->statement != NULL) {
+        /* There is an active statement */
+        rc = statement_reset(self->statement);
+    }
+
+    if (PyString_Check(operation)) {
+        operation_cstr = PyString_AsString(operation);
+    } else {
+        operation_bytestr = PyUnicode_AsUTF8String(operation);
+        if (!operation_bytestr) {
+            goto error;
+        }
+
+        operation_cstr = PyString_AsString(operation_bytestr);
+    }
+
+    /* reset description and rowcount */
+    Py_DECREF(self->description);
+    Py_INCREF(Py_None);
+    self->description = Py_None;
+
+    Py_DECREF(self->rowcount);
+    self->rowcount = PyInt_FromLong(-1L);
+
+    statement_type = detect_statement_type(operation_cstr);
+    if (self->connection->begin_statement) {
+        switch (statement_type) {
+            case STATEMENT_UPDATE:
+            case STATEMENT_DELETE:
+            case STATEMENT_INSERT:
+            case STATEMENT_REPLACE:
+                if (!self->connection->inTransaction) {
+                    result = _connection_begin(self->connection);
+                    if (!result) {
+                        goto error;
+                    }
+                    Py_DECREF(result);
+                }
+                break;
+            case STATEMENT_OTHER:
+                /* it's a DDL statement or something similar
+                   - we better COMMIT first so it works for all cases */
+                if (self->connection->inTransaction) {
+                    func_args = PyTuple_New(0);
+                    result = connection_commit(self->connection, func_args);
+                    Py_DECREF(func_args);
+                    if (!result) {
+                        goto error;
+                    }
+                    Py_DECREF(result);
+                }
+                break;
+            case STATEMENT_SELECT:
+                if (multiple) {
+                    PyErr_SetString(ProgrammingError,
+                                "You cannot execute SELECT statements in executemany().");
+                    goto error;
+                }
+        }
+    }
+
+    func_args = PyTuple_New(1);
+    Py_INCREF(operation);
+    PyTuple_SetItem(func_args, 0, operation);
+
+    if (self->statement) {
+        (void)statement_reset(self->statement);
+        Py_DECREF(self->statement);
+    }
+
+    self->statement = (Statement*)cache_get(self->connection->statement_cache, func_args);
+    Py_DECREF(func_args);
+
+    if (!self->statement) {
+        goto error;
+    }
+
+    if (self->statement->in_use) {
+        Py_DECREF(self->statement);
+        self->statement = PyObject_New(Statement, &StatementType);
+        rc = statement_create(self->statement, self->connection, operation);
+        if (rc != SQLITE_OK) {
+            self->statement = 0;
+            goto error;
+        }
+    }
+
+    statement_reset(self->statement);
+    statement_mark_dirty(self->statement);
+
+    Py_BEGIN_ALLOW_THREADS
+    num_params_needed = sqlite3_bind_parameter_count(self->statement->st);
+    Py_END_ALLOW_THREADS
+
+    while (1) {
+        parameters = PyIter_Next(parameters_iter);
+        if (!parameters) {
+            break;
+        }
+
+        statement_mark_dirty(self->statement);
+
+        if (PyDict_Check(parameters)) {
+            /* parameters passed as dictionary */
+            for (i = 1; i <= num_params_needed; i++) {
+                Py_BEGIN_ALLOW_THREADS
+                binding_name = sqlite3_bind_parameter_name(self->statement->st, i);
+                Py_END_ALLOW_THREADS
+                if (!binding_name) {
+                    PyErr_Format(ProgrammingError, "Binding %d has no name, but you supplied a dictionary (which has only names).", i);
+                    goto error;
+                }
+
+                binding_name++; /* skip first char (the colon) */
+                current_param = PyDict_GetItemString(parameters, binding_name);
+                if (!current_param) {
+                    PyErr_Format(ProgrammingError, "You did not supply a value for binding %d.", i);
+                    goto error;
+                }
+
+                Py_INCREF(current_param);
+                adapted = microprotocols_adapt(current_param, (PyObject*)&SQLitePrepareProtocolType, NULL);
+                if (adapted) {
+                    Py_DECREF(current_param);
+                } else {
+                    PyErr_Clear();
+                    adapted = current_param;
+                }
+
+                rc = _bind_parameter(self, i, adapted);
+                Py_DECREF(adapted);
+
+                if (rc != SQLITE_OK) {
+                    PyErr_Format(InterfaceError, "Error binding parameter :%s - probably unsupported type.", binding_name);
+                    goto error;
+               }
+            }
+        } else {
+            /* parameters passed as sequence */
+            num_params = PySequence_Length(parameters);
+            if (num_params != num_params_needed) {
+                PyErr_Format(ProgrammingError, "Incorrect number of bindings supplied. The current statement uses %d, and there are %d supplied.",
+                             num_params_needed, num_params);
+                goto error;
+            }
+            for (i = 0; i < num_params; i++) {
+                current_param = PySequence_GetItem(parameters, i);
+                if (!current_param) {
+                    goto error;
+                }
+                adapted = microprotocols_adapt(current_param, (PyObject*)&SQLitePrepareProtocolType, NULL);
+
+                if (adapted) {
+                    Py_DECREF(current_param);
+                } else {
+                    PyErr_Clear();
+                    adapted = current_param;
+                }
+
+                rc = _bind_parameter(self, i + 1, adapted);
+                Py_DECREF(adapted);
+
+                if (rc != SQLITE_OK) {
+                    PyErr_Format(InterfaceError, "Error binding parameter %d - probably unsupported type.", i);
+                    goto error;
+                }
+            }
+        }
+
+        build_row_cast_map(self);
+
+        rc = _sqlite_step_with_busyhandler(self->statement->st, self->connection);
+        if (rc != SQLITE_DONE && rc != SQLITE_ROW) {
+            rc = statement_reset(self->statement);
+            if (rc == SQLITE_SCHEMA) {
+                rc = statement_recompile(self->statement);
+                if (rc == SQLITE_OK) {
+                    rc = _sqlite_step_with_busyhandler(self->statement->st, self->connection);
+                } else {
+                    _seterror(self->connection->db);
+                    goto error;
+                }
+            } else {
+                _seterror(self->connection->db);
+                goto error;
+            }
+        }
+
+        if (rc == SQLITE_ROW || (rc == SQLITE_DONE && statement_type == STATEMENT_SELECT)) {
+            Py_BEGIN_ALLOW_THREADS
+            numcols = sqlite3_column_count(self->statement->st);
+            Py_END_ALLOW_THREADS
+
+            if (self->description == Py_None) {
+                Py_DECREF(self->description);
+                self->description = PyTuple_New(numcols);
+                for (i = 0; i < numcols; i++) {
+                    descriptor = PyTuple_New(7);
+                    PyTuple_SetItem(descriptor, 0, _build_column_name(sqlite3_column_name(self->statement->st, i)));
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 1, Py_None);
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 2, Py_None);
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 3, Py_None);
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 4, Py_None);
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 5, Py_None);
+                    Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 6, Py_None);
+                    PyTuple_SetItem(self->description, i, descriptor);
+                }
+            }
+        }
+
+        if (rc == SQLITE_ROW) {
+            if (multiple) {
+                PyErr_SetString(ProgrammingError, "executemany() can only execute DML statements.");
+                goto error;
+            }
+
+            self->next_row = _fetch_one_row(self);
+        } else if (rc == SQLITE_DONE && !multiple) {
+            statement_reset(self->statement);
+            Py_DECREF(self->statement);
+            self->statement = 0;
+        }
+
+        switch (statement_type) {
+            case STATEMENT_UPDATE:
+            case STATEMENT_DELETE:
+            case STATEMENT_INSERT:
+            case STATEMENT_REPLACE:
+                Py_BEGIN_ALLOW_THREADS
+                rowcount += (long)sqlite3_changes(self->connection->db);
+                Py_END_ALLOW_THREADS
+                Py_DECREF(self->rowcount);
+                self->rowcount = PyInt_FromLong(rowcount);
+        }
+
+        Py_DECREF(self->lastrowid);
+        if (statement_type == STATEMENT_INSERT) {
+            Py_BEGIN_ALLOW_THREADS
+            lastrowid = sqlite3_last_insert_rowid(self->connection->db);
+            Py_END_ALLOW_THREADS
+            self->lastrowid = PyInt_FromLong((long)lastrowid);
+        } else {
+            Py_INCREF(Py_None);
+            self->lastrowid = Py_None;
+        }
+
+        if (multiple) {
+            rc = statement_reset(self->statement);
+        }
+        Py_XDECREF(parameters);
+    }
+
+error:
+    Py_XDECREF(operation_bytestr);
+    Py_XDECREF(parameters);
+    Py_DECREF(parameters_iter);
+    Py_XDECREF(parameters_list);
+
+    if (PyErr_Occurred()) {
+        return NULL;
+    } else {
+        Py_INCREF(Py_None);
+        return Py_None;
+    }
+}
+
+PyObject* cursor_execute(Cursor* self, PyObject* args)
+{
+    return _query_execute(self, 0, args);
+}
+
+PyObject* cursor_executemany(Cursor* self, PyObject* args)
+{
+    return _query_execute(self, 1, args);
+}
+
+PyObject* cursor_executescript(Cursor* self, PyObject* args)
+{
+    PyObject* script_obj;
+    PyObject* script_str = NULL;
+    const char* script_cstr;
+    sqlite3_stmt* statement;
+    int rc;
+    PyObject* func_args;
+    PyObject* result;
+    int statement_completed = 0;
+
+    if (!PyArg_ParseTuple(args, "O", &script_obj)) {
+        return NULL; 
+    }
+
+    if (!check_thread(self->connection) || !check_connection(self->connection)) {
+        return NULL;
+    }
+
+    if (PyString_Check(script_obj)) {
+        script_cstr = PyString_AsString(script_obj);
+    } else if (PyUnicode_Check(script_obj)) {
+        script_str = PyUnicode_AsUTF8String(script_obj);
+        if (!script_obj) {
+            return NULL;
+        }
+
+        script_cstr = PyString_AsString(script_str);
+    } else {
+        PyErr_SetString(PyExc_ValueError, "script argument must be unicode or string.");
+        return NULL;
+    }
+
+    /* commit first */
+    func_args = PyTuple_New(0);
+    result = connection_commit(self->connection, func_args);
+    Py_DECREF(func_args);
+    if (!result) {
+        goto error;
+    }
+    Py_DECREF(result);
+
+    while (1) {
+        if (!sqlite3_complete(script_cstr)) {
+            break;
+        }
+        statement_completed = 1;
+
+        rc = sqlite3_prepare(self->connection->db,
+                             script_cstr,
+                             -1,
+                             &statement,
+                             &script_cstr);
+        if (rc != SQLITE_OK) {
+            _seterror(self->connection->db);
+            goto error;
+        }
+
+        /* execute statement, and ignore results of SELECT statements */
+        rc = SQLITE_ROW;
+        while (rc == SQLITE_ROW) {
+            rc = _sqlite_step_with_busyhandler(statement, self->connection);
+        }
+
+        if (rc != SQLITE_DONE) {
+            (void)sqlite3_finalize(statement);
+            _seterror(self->connection->db);
+            goto error;
+        }
+
+        rc = sqlite3_finalize(statement);
+        if (rc != SQLITE_OK) {
+            _seterror(self->connection->db);
+            goto error;
+        }
+    }
+
+error:
+    Py_XDECREF(script_str);
+
+    if (!statement_completed) {
+        PyErr_SetString(ProgrammingError, "you did not provide a complete SQL statement");
+    }
+
+    if (PyErr_Occurred()) {
+        return NULL;
+    } else {
+        Py_INCREF(Py_None);
+        return Py_None;
+    }
+}
+
+PyObject* cursor_getiter(Cursor *self)
+{
+    Py_INCREF(self);
+    return (PyObject*)self;
+}
+
+PyObject* cursor_iternext(Cursor *self)
+{
+    PyObject* next_row_tuple;
+    PyObject* next_row;
+    int rc;
+
+    if (!check_thread(self->connection) || !check_connection(self->connection)) {
+        return NULL;
+    }
+
+    if (!self->next_row) {
+         if (self->statement) {
+            (void)statement_reset(self->statement);
+            Py_DECREF(self->statement);
+            self->statement = NULL;
+        }
+        return NULL;
+    }
+
+    next_row_tuple = self->next_row;
+    self->next_row = NULL;
+
+    if (self->row_factory != Py_None) {
+        next_row = PyObject_CallFunction(self->row_factory, "OO", self, next_row_tuple);
+        Py_DECREF(next_row_tuple);
+    } else {
+        next_row = next_row_tuple;
+    }
+
+    rc = _sqlite_step_with_busyhandler(self->statement->st, self->connection);
+    if (rc != SQLITE_DONE && rc != SQLITE_ROW) {
+        Py_DECREF(next_row);
+        _seterror(self->connection->db);
+        return NULL;
+    }
+
+    if (rc == SQLITE_ROW) {
+        self->next_row = _fetch_one_row(self);
+    }
+
+    return next_row;
+}
+
+PyObject* cursor_fetchone(Cursor* self, PyObject* args)
+{
+    PyObject* row;
+
+    row = cursor_iternext(self);
+    if (!row && !PyErr_Occurred()) {
+        Py_INCREF(Py_None);
+        return Py_None;
+    }
+
+    return row;
+}
+
+PyObject* cursor_fetchmany(Cursor* self, PyObject* args)
+{
+    PyObject* row;
+    PyObject* list;
+    int maxrows = self->arraysize;
+    int counter = 0;
+
+    if (!PyArg_ParseTuple(args, "|i", &maxrows)) {
+        return NULL; 
+    }
+
+    list = PyList_New(0);
+
+    /* just make sure we enter the loop */
+    row = (PyObject*)1;
+
+    while (row) {
+        row = cursor_iternext(self);
+        if (row) {
+            PyList_Append(list, row);
+            Py_DECREF(row);
+        } else {
+            break;
+        }
+
+        if (++counter == maxrows) {
+            break;
+        }
+    }
+
+    if (PyErr_Occurred()) {
+        Py_DECREF(list);
+        return NULL;
+    } else {
+        return list;
+    }
+}
+
+PyObject* cursor_fetchall(Cursor* self, PyObject* args)
+{
+    PyObject* row;
+    PyObject* list;
+
+    list = PyList_New(0);
+
+    /* just make sure we enter the loop */
+    row = (PyObject*)1;
+
+    while (row) {
+        row = cursor_iternext(self);
+        if (row) {
+            PyList_Append(list, row);
+            Py_DECREF(row);
+        }
+    }
+
+    if (PyErr_Occurred()) {
+        Py_DECREF(list);
+        return NULL;
+    } else {
+        return list;
+    }
+}
+
+PyObject* pysqlite_noop(Connection* self, PyObject* args)
+{
+    /* don't care, return None */
+    Py_INCREF(Py_None);
+    return Py_None;
+}
+
+PyObject* cursor_close(Cursor* self, PyObject* args)
+{
+    if (!check_thread(self->connection) || !check_connection(self->connection)) {
+        return NULL;
+    }
+
+    if (self->statement) {
+        (void)statement_reset(self->statement);
+        Py_DECREF(self->statement);
+        self->statement = 0;
+    }
+
+    Py_INCREF(Py_None);
+    return Py_None;
+}
+
+static PyMethodDef cursor_methods[] = {
+    {"execute", (PyCFunction)cursor_execute, METH_VARARGS,
+        PyDoc_STR("Executes a SQL statement.")},
+    {"executemany", (PyCFunction)cursor_executemany, METH_VARARGS,
+        PyDoc_STR("Repeatedly executes a SQL statement.")},
+    {"executescript", (PyCFunction)cursor_executescript, METH_VARARGS,
+        PyDoc_STR("Executes a multiple SQL statements at once. Non-standard.")},
+    {"fetchone", (PyCFunction)cursor_fetchone, METH_NOARGS,
+        PyDoc_STR("Fetches several rows from the resultset.")},
+    {"fetchmany", (PyCFunction)cursor_fetchmany, METH_VARARGS,
+        PyDoc_STR("Fetches all rows from the resultset.")},
+    {"fetchall", (PyCFunction)cursor_fetchall, METH_NOARGS,
+        PyDoc_STR("Fetches one row from the resultset.")},
+    {"close", (PyCFunction)cursor_close, METH_NOARGS,
+        PyDoc_STR("Closes the cursor.")},
+    {"setinputsizes", (PyCFunction)pysqlite_noop, METH_VARARGS,
+        PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
+    {"setoutputsize", (PyCFunction)pysqlite_noop, METH_VARARGS,
+        PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
+    {NULL, NULL}
+};
+
+static struct PyMemberDef cursor_members[] =
+{
+    {"connection", T_OBJECT, offsetof(Cursor, connection), RO},
+    {"description", T_OBJECT, offsetof(Cursor, description), RO},
+    {"arraysize", T_INT, offsetof(Cursor, arraysize), 0},
+    {"lastrowid", T_OBJECT, offsetof(Cursor, lastrowid), RO},
+    {"rowcount", T_OBJECT, offsetof(Cursor, rowcount), RO},
+    {"row_factory", T_OBJECT, offsetof(Cursor, row_factory), 0},
+    {NULL}
+};
+
+PyTypeObject CursorType = {
+        PyObject_HEAD_INIT(NULL)
+        0,                                              /* ob_size */
+        "pysqlite2.dbapi2.Cursor",                      /* tp_name */
+        sizeof(Cursor),                                 /* tp_basicsize */
+        0,                                              /* tp_itemsize */
+        (destructor)cursor_dealloc,                     /* 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|Py_TPFLAGS_HAVE_ITER|Py_TPFLAGS_BASETYPE, /* tp_flags */
+        0,                                              /* tp_doc */
+        0,                                              /* tp_traverse */
+        0,                                              /* tp_clear */
+        0,                                              /* tp_richcompare */
+        0,                                              /* tp_weaklistoffset */
+        (getiterfunc)cursor_getiter,                    /* tp_iter */
+        (iternextfunc)cursor_iternext,                  /* tp_iternext */
+        cursor_methods,                                 /* tp_methods */
+        cursor_members,                                 /* tp_members */
+        0,                                              /* tp_getset */
+        0,                                              /* tp_base */
+        0,                                              /* tp_dict */
+        0,                                              /* tp_descr_get */
+        0,                                              /* tp_descr_set */
+        0,                                              /* tp_dictoffset */
+        (initproc)cursor_init,                          /* tp_init */
+        0,                                              /* tp_alloc */
+        0,                                              /* tp_new */
+        0                                               /* tp_free */
+};
+
+extern int cursor_setup_types(void)
+{
+    CursorType.tp_new = PyType_GenericNew;
+    return PyType_Ready(&CursorType);
+}