| 1 | /* stringlib: partition implementation */
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| 2 |
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| 3 | #ifndef STRINGLIB_PARTITION_H
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| 4 | #define STRINGLIB_PARTITION_H
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| 5 |
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| 6 | #ifndef STRINGLIB_FASTSEARCH_H
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| 7 | #error must include "stringlib/fastsearch.h" before including this module
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| 8 | #endif
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| 9 |
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| 10 | Py_LOCAL_INLINE(PyObject*)
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| 11 | stringlib_partition(
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| 12 | PyObject* str_obj, const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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| 13 | PyObject* sep_obj, const STRINGLIB_CHAR* sep, Py_ssize_t sep_len
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| 14 | )
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| 15 | {
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| 16 | PyObject* out;
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| 17 | Py_ssize_t pos;
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| 18 |
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| 19 | if (sep_len == 0) {
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| 20 | PyErr_SetString(PyExc_ValueError, "empty separator");
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| 21 | return NULL;
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| 22 | }
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| 23 |
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| 24 | out = PyTuple_New(3);
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| 25 | if (!out)
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| 26 | return NULL;
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| 27 |
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| 28 | pos = fastsearch(str, str_len, sep, sep_len, FAST_SEARCH);
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| 29 |
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| 30 | if (pos < 0) {
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| 31 | Py_INCREF(str_obj);
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| 32 | PyTuple_SET_ITEM(out, 0, (PyObject*) str_obj);
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| 33 | Py_INCREF(STRINGLIB_EMPTY);
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| 34 | PyTuple_SET_ITEM(out, 1, (PyObject*) STRINGLIB_EMPTY);
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| 35 | Py_INCREF(STRINGLIB_EMPTY);
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| 36 | PyTuple_SET_ITEM(out, 2, (PyObject*) STRINGLIB_EMPTY);
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| 37 | return out;
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| 38 | }
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| 39 |
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| 40 | PyTuple_SET_ITEM(out, 0, STRINGLIB_NEW(str, pos));
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| 41 | Py_INCREF(sep_obj);
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| 42 | PyTuple_SET_ITEM(out, 1, sep_obj);
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| 43 | pos += sep_len;
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| 44 | PyTuple_SET_ITEM(out, 2, STRINGLIB_NEW(str + pos, str_len - pos));
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| 45 |
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| 46 | if (PyErr_Occurred()) {
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| 47 | Py_DECREF(out);
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| 48 | return NULL;
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| 49 | }
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| 50 |
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| 51 | return out;
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| 52 | }
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| 53 |
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| 54 | Py_LOCAL_INLINE(PyObject*)
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| 55 | stringlib_rpartition(
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| 56 | PyObject* str_obj, const STRINGLIB_CHAR* str, Py_ssize_t str_len,
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| 57 | PyObject* sep_obj, const STRINGLIB_CHAR* sep, Py_ssize_t sep_len
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| 58 | )
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| 59 | {
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| 60 | PyObject* out;
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| 61 | Py_ssize_t pos, j;
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| 62 |
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| 63 | if (sep_len == 0) {
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| 64 | PyErr_SetString(PyExc_ValueError, "empty separator");
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| 65 | return NULL;
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| 66 | }
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| 67 |
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| 68 | out = PyTuple_New(3);
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| 69 | if (!out)
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| 70 | return NULL;
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| 71 |
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| 72 | /* XXX - create reversefastsearch helper! */
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| 73 | pos = -1;
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| 74 | for (j = str_len - sep_len; j >= 0; --j)
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| 75 | if (STRINGLIB_CMP(str+j, sep, sep_len) == 0) {
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| 76 | pos = j;
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| 77 | break;
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| 78 | }
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| 79 |
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| 80 | if (pos < 0) {
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| 81 | Py_INCREF(STRINGLIB_EMPTY);
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| 82 | PyTuple_SET_ITEM(out, 0, (PyObject*) STRINGLIB_EMPTY);
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| 83 | Py_INCREF(STRINGLIB_EMPTY);
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| 84 | PyTuple_SET_ITEM(out, 1, (PyObject*) STRINGLIB_EMPTY);
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| 85 | Py_INCREF(str_obj);
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| 86 | PyTuple_SET_ITEM(out, 2, (PyObject*) str_obj);
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| 87 | return out;
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| 88 | }
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| 89 |
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| 90 | PyTuple_SET_ITEM(out, 0, STRINGLIB_NEW(str, pos));
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| 91 | Py_INCREF(sep_obj);
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| 92 | PyTuple_SET_ITEM(out, 1, sep_obj);
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| 93 | pos += sep_len;
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| 94 | PyTuple_SET_ITEM(out, 2, STRINGLIB_NEW(str + pos, str_len - pos));
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| 95 |
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| 96 | if (PyErr_Occurred()) {
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| 97 | Py_DECREF(out);
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| 98 | return NULL;
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| 99 | }
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| 100 |
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| 101 | return out;
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| 102 | }
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| 103 |
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| 104 | #endif
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| 105 |
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| 106 | /*
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| 107 | Local variables:
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| 108 | c-basic-offset: 4
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| 109 | indent-tabs-mode: nil
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| 110 | End:
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| 111 | */
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