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Add a method to get the list of available transliterators in ICU

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Kovid Goyal 2012-08-24 22:32:14 +05:30
parent e05c862dd0
commit 016ec7ade3
1 changed files with 51 additions and 1 deletions
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52
src/calibre/utils/icu.c
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@ -7,7 +7,25 @@
#include <unicode/ucoleitr.h>
#include <unicode/ustring.h>
#include <unicode/usearch.h>
#include <unicode/utrans.h>
static PyObject* uchar_to_unicode(const UChar *src, int32_t len) {
wchar_t *buf = NULL;
PyObject *ans = NULL;
UErrorCode status = U_ZERO_ERROR;
if (len < 0) { len = u_strlen(src); }
buf = (wchar_t *)calloc(4*len, sizeof(wchar_t));
if (buf == NULL) return PyErr_NoMemory();
u_strToWCS(buf, 4*len, NULL, src, len, &status);
if (U_SUCCESS(status)) {
ans = PyUnicode_FromWideChar(buf, wcslen(buf));
if (ans == NULL) PyErr_NoMemory();
} else PyErr_SetString(PyExc_TypeError, "Failed to convert UChar* to wchar_t*");
free(buf);
return ans;
}
// Collator object definition {{{
typedef struct {
@ -610,7 +628,6 @@ icu_title(PyObject *self, PyObject *args) {
return ret;
} // }}}
// set_default_encoding {{{
static PyObject *
icu_set_default_encoding(PyObject *self, PyObject *args) {
@ -625,6 +642,35 @@ icu_set_default_encoding(PyObject *self, PyObject *args) {
}
// }}}
// set_default_encoding {{{
static PyObject *
icu_get_available_transliterators(PyObject *self, PyObject *args) {
PyObject *ans, *l;
UErrorCode status = U_ZERO_ERROR;
const UChar *id = NULL;
UEnumeration *i;
ans = PyList_New(0);
if (ans == NULL) return PyErr_NoMemory();
i = utrans_openIDs(&status);
if (i == NULL || U_FAILURE(status)) {Py_DECREF(ans); PyErr_SetString(PyExc_RuntimeError, "Failed to create enumerator"); return NULL; }
do {
id = uenum_unext(i, NULL, &status);
if (U_SUCCESS(status) && id != NULL) {
l = uchar_to_unicode(id, -1);
if (l == NULL) break;
PyList_Append(ans, l);
Py_DECREF(l);
}
} while(id != NULL);
uenum_close(i);
return ans;
}
// }}}
static PyMethodDef icu_methods[] = {
{"upper", icu_upper, METH_VARARGS,
"upper(locale, unicode object) -> upper cased unicode object using locale rules."
@ -642,6 +688,10 @@ static PyMethodDef icu_methods[] = {
"set_default_encoding(encoding) -> Set the default encoding for the python unicode implementation."
},
{"get_available_transliterators", icu_get_available_transliterators, METH_VARARGS,
"get_available_transliterators() -> Return list of available transliterators. This list is rather limited on OS X."
},
{NULL} /* Sentinel */
};