Library import 16 (#2433)

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1 files changed, 167 insertions, 0 deletions

diff --git a/contrib/tools/python3/Modules/_sqlite/util.c b/contrib/tools/python3/Modules/_sqlite/util.c
new file mode 100644
index 00000000000..2b3bbfefa3c
--- /dev/null
+++ b/contrib/tools/python3/Modules/_sqlite/util.c
@@ -0,0 +1,167 @@
+/* util.c - various utility functions
+ *
+ * Copyright (C) 2005-2010 Gerhard Häring <[email protected]>
+ *
+ * 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 "module.h"
+#include "connection.h"
+
+// Returns non-NULL if a new exception should be raised
+static PyObject *
+get_exception_class(pysqlite_state *state, int errorcode)
+{
+    switch (errorcode) {
+        case SQLITE_OK:
+            PyErr_Clear();
+            return NULL;
+        case SQLITE_INTERNAL:
+        case SQLITE_NOTFOUND:
+            return state->InternalError;
+        case SQLITE_NOMEM:
+            return PyErr_NoMemory();
+        case SQLITE_ERROR:
+        case SQLITE_PERM:
+        case SQLITE_ABORT:
+        case SQLITE_BUSY:
+        case SQLITE_LOCKED:
+        case SQLITE_READONLY:
+        case SQLITE_INTERRUPT:
+        case SQLITE_IOERR:
+        case SQLITE_FULL:
+        case SQLITE_CANTOPEN:
+        case SQLITE_PROTOCOL:
+        case SQLITE_EMPTY:
+        case SQLITE_SCHEMA:
+            return state->OperationalError;
+        case SQLITE_CORRUPT:
+            return state->DatabaseError;
+        case SQLITE_TOOBIG:
+            return state->DataError;
+        case SQLITE_CONSTRAINT:
+        case SQLITE_MISMATCH:
+            return state->IntegrityError;
+        case SQLITE_MISUSE:
+        case SQLITE_RANGE:
+            return state->InterfaceError;
+        default:
+            return state->DatabaseError;
+    }
+}
+
+static void
+raise_exception(PyObject *type, int errcode, const char *errmsg)
+{
+    PyObject *exc = NULL;
+    PyObject *args[] = { PyUnicode_FromString(errmsg), };
+    if (args[0] == NULL) {
+        goto exit;
+    }
+    exc = PyObject_Vectorcall(type, args, 1, NULL);
+    Py_DECREF(args[0]);
+    if (exc == NULL) {
+        goto exit;
+    }
+
+    PyObject *code = PyLong_FromLong(errcode);
+    if (code == NULL) {
+        goto exit;
+    }
+    int rc = PyObject_SetAttrString(exc, "sqlite_errorcode", code);
+    Py_DECREF(code);
+    if (rc < 0) {
+        goto exit;
+    }
+
+    const char *error_name = pysqlite_error_name(errcode);
+    PyObject *name;
+    if (error_name) {
+        name = PyUnicode_FromString(error_name);
+    }
+    else {
+        name = PyUnicode_InternFromString("unknown");
+    }
+    if (name == NULL) {
+        goto exit;
+    }
+    rc = PyObject_SetAttrString(exc, "sqlite_errorname", name);
+    Py_DECREF(name);
+    if (rc < 0) {
+        goto exit;
+    }
+
+    PyErr_SetObject(type, exc);
+
+exit:
+    Py_XDECREF(exc);
+}
+
+/**
+ * Checks the SQLite error code and sets the appropriate DB-API exception.
+ * Returns the error code (0 means no error occurred).
+ */
+int
+_pysqlite_seterror(pysqlite_state *state, sqlite3 *db)
+{
+    int errorcode = sqlite3_errcode(db);
+    PyObject *exc_class = get_exception_class(state, errorcode);
+    if (exc_class == NULL) {
+        // No new exception need be raised; just pass the error code
+        return errorcode;
+    }
+
+    /* Create and set the exception. */
+    int extended_errcode = sqlite3_extended_errcode(db);
+    const char *errmsg = sqlite3_errmsg(db);
+    raise_exception(exc_class, extended_errcode, errmsg);
+    return extended_errcode;
+}
+
+#ifdef WORDS_BIGENDIAN
+# define IS_LITTLE_ENDIAN 0
+#else
+# define IS_LITTLE_ENDIAN 1
+#endif
+
+sqlite_int64
+_pysqlite_long_as_int64(PyObject * py_val)
+{
+    int overflow;
+    long long value = PyLong_AsLongLongAndOverflow(py_val, &overflow);
+    if (value == -1 && PyErr_Occurred())
+        return -1;
+    if (!overflow) {
+# if SIZEOF_LONG_LONG > 8
+        if (-0x8000000000000000LL <= value && value <= 0x7FFFFFFFFFFFFFFFLL)
+# endif
+            return value;
+    }
+    else if (sizeof(value) < sizeof(sqlite_int64)) {
+        sqlite_int64 int64val;
+        if (_PyLong_AsByteArray((PyLongObject *)py_val,
+                                (unsigned char *)&int64val, sizeof(int64val),
+                                IS_LITTLE_ENDIAN, 1 /* signed */) >= 0) {
+            return int64val;
+        }
+    }
+    PyErr_SetString(PyExc_OverflowError,
+                    "Python int too large to convert to SQLite INTEGER");
+    return -1;
+}