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/Objects/stringlib/partition.h

http://unladen-swallow.googlecode.com/
C++ Header | 111 lines | 83 code | 20 blank | 8 comment | 13 complexity | a29043b23742745fc5af2ff92ecae3b6 MD5 | raw file
  1/* stringlib: partition implementation */
  2
  3#ifndef STRINGLIB_PARTITION_H
  4#define STRINGLIB_PARTITION_H
  5
  6#ifndef STRINGLIB_FASTSEARCH_H
  7#error must include "stringlib/fastsearch.h" before including this module
  8#endif
  9
 10Py_LOCAL_INLINE(PyObject*)
 11stringlib_partition(
 12    PyObject* str_obj, const STRINGLIB_CHAR* str, Py_ssize_t str_len,
 13    PyObject* sep_obj, const STRINGLIB_CHAR* sep, Py_ssize_t sep_len
 14    )
 15{
 16    PyObject* out;
 17    Py_ssize_t pos;
 18
 19    if (sep_len == 0) {
 20        PyErr_SetString(PyExc_ValueError, "empty separator");
 21	return NULL;
 22    }
 23
 24    out = PyTuple_New(3);
 25    if (!out)
 26	return NULL;
 27
 28    pos = fastsearch(str, str_len, sep, sep_len, FAST_SEARCH);
 29
 30    if (pos < 0) {
 31	Py_INCREF(str_obj);
 32	PyTuple_SET_ITEM(out, 0, (PyObject*) str_obj);
 33	Py_INCREF(STRINGLIB_EMPTY);
 34	PyTuple_SET_ITEM(out, 1, (PyObject*) STRINGLIB_EMPTY);
 35	Py_INCREF(STRINGLIB_EMPTY);
 36	PyTuple_SET_ITEM(out, 2, (PyObject*) STRINGLIB_EMPTY);
 37	return out;
 38    }
 39
 40    PyTuple_SET_ITEM(out, 0, STRINGLIB_NEW(str, pos));
 41    Py_INCREF(sep_obj);
 42    PyTuple_SET_ITEM(out, 1, sep_obj);
 43    pos += sep_len;
 44    PyTuple_SET_ITEM(out, 2, STRINGLIB_NEW(str + pos, str_len - pos));
 45
 46    if (PyErr_Occurred()) {
 47	Py_DECREF(out);
 48	return NULL;
 49    }
 50
 51    return out;
 52}
 53
 54Py_LOCAL_INLINE(PyObject*)
 55stringlib_rpartition(
 56    PyObject* str_obj, const STRINGLIB_CHAR* str, Py_ssize_t str_len,
 57    PyObject* sep_obj, const STRINGLIB_CHAR* sep, Py_ssize_t sep_len
 58    )
 59{
 60    PyObject* out;
 61    Py_ssize_t pos, j;
 62
 63    if (sep_len == 0) {
 64        PyErr_SetString(PyExc_ValueError, "empty separator");
 65	return NULL;
 66    }
 67
 68    out = PyTuple_New(3);
 69    if (!out)
 70	return NULL;
 71
 72    /* XXX - create reversefastsearch helper! */
 73        pos = -1;
 74	for (j = str_len - sep_len; j >= 0; --j)
 75            if (STRINGLIB_CMP(str+j, sep, sep_len) == 0) {
 76                pos = j;
 77                break;
 78            }
 79
 80    if (pos < 0) {
 81	Py_INCREF(STRINGLIB_EMPTY);
 82	PyTuple_SET_ITEM(out, 0, (PyObject*) STRINGLIB_EMPTY);
 83	Py_INCREF(STRINGLIB_EMPTY);
 84	PyTuple_SET_ITEM(out, 1, (PyObject*) STRINGLIB_EMPTY);
 85	Py_INCREF(str_obj);        
 86	PyTuple_SET_ITEM(out, 2, (PyObject*) str_obj);
 87	return out;
 88    }
 89
 90    PyTuple_SET_ITEM(out, 0, STRINGLIB_NEW(str, pos));
 91    Py_INCREF(sep_obj);
 92    PyTuple_SET_ITEM(out, 1, sep_obj);
 93    pos += sep_len;
 94    PyTuple_SET_ITEM(out, 2, STRINGLIB_NEW(str + pos, str_len - pos));
 95
 96    if (PyErr_Occurred()) {
 97	Py_DECREF(out);
 98	return NULL;
 99    }
100
101    return out;
102}
103
104#endif
105
106/*
107Local variables:
108c-basic-offset: 4
109indent-tabs-mode: nil
110End:
111*/