478 lines
12 KiB
C
478 lines
12 KiB
C
/* ------------------------------------------------------------------------
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unicodedata -- Provides access to the Unicode 3.0 data base.
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Data was extracted from the Unicode 3.0 UnicodeData.txt file.
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Written by Marc-Andre Lemburg (mal@lemburg.com).
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Modified for Python 2.0 by Fredrik Lundh (fredrik@pythonware.com)
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Copyright (c) Corporation for National Research Initiatives.
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------------------------------------------------------------------------ */
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#include "Python.h"
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#include "ucnhash.h"
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/* character properties */
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typedef struct {
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const unsigned char category; /* index into
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_PyUnicode_CategoryNames */
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const unsigned char combining; /* combining class value 0 - 255 */
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const unsigned char bidirectional; /* index into
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_PyUnicode_BidirectionalNames */
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const unsigned char mirrored; /* true if mirrored in bidir mode */
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} _PyUnicode_DatabaseRecord;
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/* data file generated by Tools/unicode/makeunicodedata.py */
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#include "unicodedata_db.h"
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static const _PyUnicode_DatabaseRecord*
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_getrecord(PyUnicodeObject* v)
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{
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int code;
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int index;
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code = (int) *PyUnicode_AS_UNICODE(v);
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if (code < 0 || code >= 65536)
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index = 0;
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else {
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index = index1[(code>>SHIFT)];
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index = index2[(index<<SHIFT)+(code&((1<<SHIFT)-1))];
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}
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return &_PyUnicode_Database_Records[index];
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}
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/* --- Module API --------------------------------------------------------- */
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static PyObject *
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unicodedata_decimal(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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PyObject *defobj = NULL;
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long rc;
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if (!PyArg_ParseTuple(args, "O!|O:decimal", &PyUnicode_Type, &v, &defobj))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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rc = Py_UNICODE_TODECIMAL(*PyUnicode_AS_UNICODE(v));
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if (rc < 0) {
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if (defobj == NULL) {
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PyErr_SetString(PyExc_ValueError,
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"not a decimal");
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return NULL;
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}
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else {
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Py_INCREF(defobj);
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return defobj;
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}
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}
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return PyInt_FromLong(rc);
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}
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static PyObject *
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unicodedata_digit(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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PyObject *defobj = NULL;
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long rc;
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if (!PyArg_ParseTuple(args, "O!|O:digit", &PyUnicode_Type, &v, &defobj))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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rc = Py_UNICODE_TODIGIT(*PyUnicode_AS_UNICODE(v));
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if (rc < 0) {
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if (defobj == NULL) {
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PyErr_SetString(PyExc_ValueError, "not a digit");
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return NULL;
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}
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else {
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Py_INCREF(defobj);
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return defobj;
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}
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}
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return PyInt_FromLong(rc);
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}
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static PyObject *
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unicodedata_numeric(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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PyObject *defobj = NULL;
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double rc;
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if (!PyArg_ParseTuple(args, "O!|O:numeric", &PyUnicode_Type, &v, &defobj))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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rc = Py_UNICODE_TONUMERIC(*PyUnicode_AS_UNICODE(v));
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if (rc < 0) {
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if (defobj == NULL) {
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PyErr_SetString(PyExc_ValueError, "not a numeric character");
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return NULL;
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}
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else {
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Py_INCREF(defobj);
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return defobj;
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}
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}
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return PyFloat_FromDouble(rc);
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}
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static PyObject *
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unicodedata_category(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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int index;
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if (!PyArg_ParseTuple(args, "O!:category",
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&PyUnicode_Type, &v))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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index = (int) _getrecord(v)->category;
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return PyString_FromString(_PyUnicode_CategoryNames[index]);
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}
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static PyObject *
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unicodedata_bidirectional(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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int index;
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if (!PyArg_ParseTuple(args, "O!:bidirectional",
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&PyUnicode_Type, &v))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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index = (int) _getrecord(v)->bidirectional;
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return PyString_FromString(_PyUnicode_BidirectionalNames[index]);
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}
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static PyObject *
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unicodedata_combining(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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if (!PyArg_ParseTuple(args, "O!:combining",
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&PyUnicode_Type, &v))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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return PyInt_FromLong((int) _getrecord(v)->combining);
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}
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static PyObject *
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unicodedata_mirrored(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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if (!PyArg_ParseTuple(args, "O!:mirrored",
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&PyUnicode_Type, &v))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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return PyInt_FromLong((int) _getrecord(v)->mirrored);
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}
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static PyObject *
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unicodedata_decomposition(PyObject *self, PyObject *args)
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{
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PyUnicodeObject *v;
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char decomp[256];
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int code, index, count, i;
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if (!PyArg_ParseTuple(args, "O!:decomposition",
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&PyUnicode_Type, &v))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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code = (int) *PyUnicode_AS_UNICODE(v);
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if (code < 0 || code >= 65536)
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index = 0;
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else {
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index = decomp_index1[(code>>DECOMP_SHIFT)];
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index = decomp_index2[(index<<DECOMP_SHIFT)+
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(code&((1<<DECOMP_SHIFT)-1))];
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}
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/* high byte is number of hex bytes (usually one or two), low byte
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is prefix code (from*/
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count = decomp_data[index] >> 8;
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/* XXX: could allocate the PyString up front instead
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(strlen(prefix) + 5 * count + 1 bytes) */
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/* copy prefix */
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i = strlen(decomp_prefix[decomp_data[index] & 255]);
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memcpy(decomp, decomp_prefix[decomp_data[index] & 255], i);
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while (count-- > 0) {
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if (i)
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decomp[i++] = ' ';
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assert((size_t)i < sizeof(decomp));
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PyOS_snprintf(decomp + i, sizeof(decomp) - i, "%04X",
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decomp_data[++index]);
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i += strlen(decomp + i);
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}
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decomp[i] = '\0';
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return PyString_FromString(decomp);
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}
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/* -------------------------------------------------------------------- */
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/* unicode character name tables */
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/* data file generated by Tools/unicode/makeunicodedata.py */
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#include "unicodename_db.h"
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/* -------------------------------------------------------------------- */
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/* database code (cut and pasted from the unidb package) */
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static unsigned long
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_gethash(const char *s, int len, int scale)
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{
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int i;
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unsigned long h = 0;
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unsigned long ix;
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for (i = 0; i < len; i++) {
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h = (h * scale) + (unsigned char) toupper(s[i]);
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ix = h & 0xff000000;
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if (ix)
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h = (h ^ ((ix>>24) & 0xff)) & 0x00ffffff;
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}
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return h;
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}
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static int
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_getucname(Py_UCS4 code, char* buffer, int buflen)
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{
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int offset;
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int i;
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int word;
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unsigned char* w;
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if (code >= 65536)
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return 0;
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/* get offset into phrasebook */
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offset = phrasebook_offset1[(code>>phrasebook_shift)];
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offset = phrasebook_offset2[(offset<<phrasebook_shift) +
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(code&((1<<phrasebook_shift)-1))];
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if (!offset)
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return 0;
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i = 0;
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for (;;) {
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/* get word index */
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word = phrasebook[offset] - phrasebook_short;
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if (word >= 0) {
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word = (word << 8) + phrasebook[offset+1];
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offset += 2;
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} else
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word = phrasebook[offset++];
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if (i) {
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if (i > buflen)
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return 0; /* buffer overflow */
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buffer[i++] = ' ';
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}
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/* copy word string from lexicon. the last character in the
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word has bit 7 set. the last word in a string ends with
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0x80 */
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w = lexicon + lexicon_offset[word];
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while (*w < 128) {
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if (i >= buflen)
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return 0; /* buffer overflow */
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buffer[i++] = *w++;
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}
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if (i >= buflen)
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return 0; /* buffer overflow */
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buffer[i++] = *w & 127;
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if (*w == 128)
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break; /* end of word */
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}
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return 1;
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}
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static int
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_cmpname(int code, const char* name, int namelen)
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{
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/* check if code corresponds to the given name */
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int i;
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char buffer[NAME_MAXLEN];
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if (!_getucname(code, buffer, sizeof(buffer)))
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return 0;
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for (i = 0; i < namelen; i++) {
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if (toupper(name[i]) != buffer[i])
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return 0;
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}
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return buffer[namelen] == '\0';
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}
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static int
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_getcode(const char* name, int namelen, Py_UCS4* code)
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{
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unsigned int h, v;
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unsigned int mask = code_size-1;
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unsigned int i, incr;
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/* the following is the same as python's dictionary lookup, with
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only minor changes. see the makeunicodedata script for more
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details */
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h = (unsigned int) _gethash(name, namelen, code_magic);
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i = (~h) & mask;
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v = code_hash[i];
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if (!v)
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return 0;
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if (_cmpname(v, name, namelen)) {
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*code = v;
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return 1;
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}
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incr = (h ^ (h >> 3)) & mask;
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if (!incr)
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incr = mask;
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for (;;) {
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i = (i + incr) & mask;
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v = code_hash[i];
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if (!v)
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return 0;
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if (_cmpname(v, name, namelen)) {
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*code = v;
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return 1;
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}
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incr = incr << 1;
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if (incr > mask)
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incr = incr ^ code_poly;
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}
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}
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static const _PyUnicode_Name_CAPI hashAPI =
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{
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sizeof(_PyUnicode_Name_CAPI),
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_getucname,
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_getcode
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};
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/* -------------------------------------------------------------------- */
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/* Python bindings */
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static PyObject *
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unicodedata_name(PyObject* self, PyObject* args)
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{
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char name[NAME_MAXLEN];
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PyUnicodeObject* v;
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PyObject* defobj = NULL;
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if (!PyArg_ParseTuple(args, "O!|O:name", &PyUnicode_Type, &v, &defobj))
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return NULL;
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if (PyUnicode_GET_SIZE(v) != 1) {
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PyErr_SetString(PyExc_TypeError,
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"need a single Unicode character as parameter");
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return NULL;
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}
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if (!_getucname((Py_UCS4) *PyUnicode_AS_UNICODE(v),
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name, sizeof(name))) {
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if (defobj == NULL) {
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PyErr_SetString(PyExc_ValueError, "no such name");
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return NULL;
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}
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else {
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Py_INCREF(defobj);
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return defobj;
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}
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}
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return Py_BuildValue("s", name);
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}
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static PyObject *
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unicodedata_lookup(PyObject* self, PyObject* args)
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{
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Py_UCS4 code;
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Py_UNICODE str[1];
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char* name;
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int namelen;
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if (!PyArg_ParseTuple(args, "s#:lookup", &name, &namelen))
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return NULL;
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if (!_getcode(name, namelen, &code)) {
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PyErr_SetString(PyExc_KeyError, "undefined character name");
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return NULL;
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}
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str[0] = (Py_UNICODE) code;
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return PyUnicode_FromUnicode(str, 1);
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}
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/* XXX Add doc strings. */
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static PyMethodDef unicodedata_functions[] = {
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{"decimal", unicodedata_decimal, METH_VARARGS},
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{"digit", unicodedata_digit, METH_VARARGS},
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{"numeric", unicodedata_numeric, METH_VARARGS},
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{"category", unicodedata_category, METH_VARARGS},
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{"bidirectional", unicodedata_bidirectional, METH_VARARGS},
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{"combining", unicodedata_combining, METH_VARARGS},
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{"mirrored", unicodedata_mirrored, METH_VARARGS},
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{"decomposition",unicodedata_decomposition, METH_VARARGS},
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{"name", unicodedata_name, METH_VARARGS},
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{"lookup", unicodedata_lookup, METH_VARARGS},
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{NULL, NULL} /* sentinel */
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};
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PyDoc_STRVAR(unicodedata_docstring, "unicode character database");
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PyMODINIT_FUNC
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initunicodedata(void)
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{
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PyObject *m, *v;
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m = Py_InitModule3(
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"unicodedata", unicodedata_functions, unicodedata_docstring);
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if (!m)
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return;
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/* Export C API */
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v = PyCObject_FromVoidPtr((void *) &hashAPI, NULL);
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if (v != NULL)
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PyModule_AddObject(m, "ucnhash_CAPI", v);
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}
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