| 1 | /* |
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| 2 | * pymigemo.c - C/Migemo Python binding |
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| 3 | * Copyright(C) 2005-2012, Atzm WATANABE <atzm@atzm.org> |
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| 4 | * |
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| 5 | * $Id$ |
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| 6 | */ |
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| 7 | |
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| 8 | #include <Python.h> |
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| 9 | #include <structmember.h> |
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| 10 | #include <migemo.h> |
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| 11 | #include <stdbool.h> |
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| 12 | #include <string.h> |
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| 13 | #include <stdlib.h> |
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| 14 | #include <errno.h> |
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| 15 | #include <sys/types.h> |
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| 16 | #include <sys/stat.h> |
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| 17 | #include <fcntl.h> |
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| 18 | #include <unistd.h> |
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| 19 | |
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| 20 | #define PYMIGEMO_VERSION "0.4" |
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| 21 | |
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| 22 | #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 1) || PY_MAJOR_VERSION > 3 |
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| 23 | # define PYTHON3 |
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| 24 | #endif |
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| 25 | |
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| 26 | #ifndef Py_TYPE |
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| 27 | # define Py_TYPE(ob) (((PyObject *)(ob))->ob_type) |
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| 28 | #endif |
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| 29 | |
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| 30 | /* for dereference migemo object members */ |
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| 31 | struct _migemo { |
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| 32 | int enable; |
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| 33 | void *mtree; |
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| 34 | int charset; |
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| 35 | void *roma2hira; |
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| 36 | void *hira2kata; |
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| 37 | void *han2zen; |
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| 38 | void *zen2han; |
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| 39 | void *rx; |
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| 40 | void *addword; |
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| 41 | void *char2int; |
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| 42 | }; |
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| 43 | |
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| 44 | typedef struct { |
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| 45 | PyObject_HEAD |
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| 46 | migemo *migemo_obj; |
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| 47 | } Migemo; |
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| 48 | |
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| 49 | static bool |
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| 50 | get_encoding(unsigned char *encoding, size_t size, int charset) |
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| 51 | { |
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| 52 | unsigned char *enc; |
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| 53 | |
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| 54 | switch(charset) { |
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| 55 | case 1: |
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| 56 | enc = "cp932"; |
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| 57 | break; |
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| 58 | case 2: |
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| 59 | enc = "euc_jp"; |
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| 60 | break; |
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| 61 | case 3: |
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| 62 | enc = "utf_8"; |
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| 63 | break; |
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| 64 | default: |
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| 65 | enc = "ascii"; |
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| 66 | } |
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| 67 | |
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| 68 | if (strlen(enc) < size) { |
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| 69 | strcpy(encoding, enc); |
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| 70 | return true; |
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| 71 | } |
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| 72 | |
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| 73 | return false; |
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| 74 | } |
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| 75 | |
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| 76 | static unsigned char * |
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| 77 | trans_string(PyObject *pystr, const unsigned char *encoding) |
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| 78 | { |
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| 79 | unsigned char *str; |
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| 80 | |
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| 81 | if (PyUnicode_Check(pystr)) { |
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| 82 | PyObject *tmp = PyUnicode_AsEncodedString(pystr, encoding, "strict"); |
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| 83 | |
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| 84 | if (tmp == NULL) { |
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| 85 | return NULL; |
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| 86 | } |
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| 87 | |
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| 88 | str = strdup(PyBytes_AS_STRING(tmp)); |
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| 89 | Py_DECREF(tmp); |
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| 90 | |
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| 91 | if (str == NULL) { |
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| 92 | PyErr_NoMemory(); |
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| 93 | return NULL; |
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| 94 | } |
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| 95 | return str; |
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| 96 | } |
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| 97 | |
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| 98 | if (PyBytes_Check(pystr)) { |
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| 99 | if ((str = strdup(PyBytes_AS_STRING(pystr))) == NULL) { |
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| 100 | PyErr_NoMemory(); |
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| 101 | return NULL; |
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| 102 | } |
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| 103 | return str; |
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| 104 | } |
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| 105 | |
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| 106 | PyErr_SetString(PyExc_TypeError, "argument must be string"); |
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| 107 | return NULL; |
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| 108 | } |
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| 109 | |
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| 110 | static int |
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| 111 | isloadable(const unsigned char *path) |
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| 112 | { |
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| 113 | struct stat st; |
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| 114 | |
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| 115 | int ret = 0; |
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| 116 | int fd = open(path, O_RDONLY); |
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| 117 | |
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| 118 | if (fd < 0) { |
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| 119 | return errno; |
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| 120 | } |
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| 121 | |
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| 122 | if (fstat(fd, &st) < 0) { |
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| 123 | ret = errno; |
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| 124 | goto isloadable_end; |
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| 125 | } |
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| 126 | if (S_ISDIR(st.st_mode)) { |
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| 127 | ret = EISDIR; |
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| 128 | goto isloadable_end; |
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| 129 | } |
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| 130 | |
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| 131 | isloadable_end: |
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| 132 | if (close(fd) < 0) { |
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| 133 | ret = errno; |
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| 134 | } |
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| 135 | return ret; |
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| 136 | } |
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| 137 | |
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| 138 | static void |
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| 139 | Migemo_dealloc(Migemo *self) |
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| 140 | { |
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| 141 | if (self->migemo_obj) { |
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| 142 | migemo_close(self->migemo_obj); |
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| 143 | } |
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| 144 | |
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| 145 | Py_TYPE(self)->tp_free((PyObject *)self); |
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| 146 | } |
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| 147 | |
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| 148 | static PyObject * |
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| 149 | Migemo_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
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| 150 | { |
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| 151 | Migemo *self = (Migemo *)type->tp_alloc(type, 0); |
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| 152 | |
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| 153 | if (self != NULL) { |
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| 154 | self->migemo_obj = NULL; |
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| 155 | } |
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| 156 | |
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| 157 | return (PyObject *)self; |
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| 158 | } |
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| 159 | |
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| 160 | static int |
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| 161 | Migemo_init(Migemo *self, PyObject *args, PyObject *kwds) |
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| 162 | { |
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| 163 | migemo *migemo_obj; |
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| 164 | unsigned char *dictionary; |
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| 165 | |
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| 166 | static char *kwlist[] = {"dictionary", NULL}; |
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| 167 | |
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| 168 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &dictionary)) { |
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| 169 | return -1; |
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| 170 | } |
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| 171 | |
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| 172 | if (dictionary) { |
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| 173 | int ret = isloadable(dictionary); |
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| 174 | |
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| 175 | if (ret != 0) { |
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| 176 | PyErr_SetString(PyExc_OSError, strerror(ret)); |
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| 177 | return -1; |
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| 178 | } |
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| 179 | |
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| 180 | if (self->migemo_obj) { |
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| 181 | migemo_close(self->migemo_obj); |
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| 182 | } |
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| 183 | |
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| 184 | migemo_obj = migemo_open(dictionary); |
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| 185 | |
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| 186 | if (migemo_obj) { |
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| 187 | self->migemo_obj = migemo_obj; |
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| 188 | } |
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| 189 | else { |
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| 190 | PyErr_SetString(PyExc_AssertionError, "migemo_open() failed"); |
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| 191 | return -1; |
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| 192 | } |
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| 193 | } |
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| 194 | |
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| 195 | return 0; |
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| 196 | } |
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| 197 | |
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| 198 | static PyObject * |
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| 199 | Migemo_get_encoding(Migemo *self) |
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| 200 | { |
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| 201 | unsigned char encoding[7]; |
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| 202 | |
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| 203 | if (!get_encoding(encoding, sizeof(encoding), self->migemo_obj->charset)) { |
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| 204 | PyErr_SetString(PyExc_AssertionError, "get_encoding() failed"); |
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| 205 | return NULL; |
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| 206 | } |
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| 207 | |
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| 208 | return PyUnicode_FromString(encoding); |
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| 209 | } |
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| 210 | |
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| 211 | static PyObject * |
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| 212 | Migemo_query(Migemo *self, PyObject *args, PyObject *kwds) |
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| 213 | { |
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| 214 | PyObject *result, *pyquery, *pyrestr; |
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| 215 | unsigned char *query, *regex, encoding[7]; |
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| 216 | |
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| 217 | static char *kwlist[] = {"query", NULL}; |
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| 218 | |
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| 219 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O", kwlist, &pyquery)) { |
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| 220 | return NULL; |
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| 221 | } |
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| 222 | |
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| 223 | if (!get_encoding(encoding, sizeof(encoding), self->migemo_obj->charset)) { |
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| 224 | PyErr_SetString(PyExc_AssertionError, "get_encoding() failed"); |
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| 225 | return NULL; |
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| 226 | } |
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| 227 | |
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| 228 | if ((query = trans_string(pyquery, encoding)) == NULL) { |
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| 229 | return NULL; |
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| 230 | } |
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| 231 | |
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| 232 | regex = migemo_query(self->migemo_obj, query); |
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| 233 | free(query); |
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| 234 | if (regex == NULL) { |
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| 235 | PyErr_SetString(PyExc_AssertionError, "migemo_query() failed"); |
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| 236 | return NULL; |
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| 237 | } |
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| 238 | |
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| 239 | pyrestr = PyBytes_FromString(regex); |
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| 240 | migemo_release(self->migemo_obj, regex); |
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| 241 | if (pyrestr == NULL) { |
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| 242 | return NULL; |
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| 243 | } |
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| 244 | |
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| 245 | result = PyUnicode_FromEncodedObject(pyrestr, encoding, "strict"); |
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| 246 | Py_DECREF(pyrestr); |
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| 247 | return result; |
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| 248 | } |
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| 249 | |
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| 250 | static PyObject * |
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| 251 | Migemo_set_operator(Migemo *self, PyObject *args, PyObject *kwds) |
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| 252 | { |
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| 253 | PyObject *result, *pyop; |
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| 254 | unsigned char *op, encoding[7]; |
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| 255 | int index; |
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| 256 | |
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| 257 | static char *kwlist[] = {"index", "op", NULL}; |
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| 258 | |
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| 259 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "iO", kwlist, &index, &pyop)) { |
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| 260 | return NULL; |
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| 261 | } |
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| 262 | |
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| 263 | if (!get_encoding(encoding, sizeof(encoding), self->migemo_obj->charset)) { |
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| 264 | PyErr_SetString(PyExc_AssertionError, "get_encoding() failed"); |
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| 265 | return NULL; |
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| 266 | } |
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| 267 | |
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| 268 | if ((op = trans_string(pyop, encoding)) == NULL) { |
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| 269 | return NULL; |
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| 270 | } |
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| 271 | |
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| 272 | result = PyBool_FromLong((long)migemo_set_operator(self->migemo_obj, index, op)); |
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| 273 | free(op); |
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| 274 | return result; |
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| 275 | } |
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| 276 | |
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| 277 | static PyObject * |
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| 278 | Migemo_get_operator(Migemo *self, PyObject *args, PyObject *kwds) |
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| 279 | { |
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| 280 | PyObject *result; |
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| 281 | const unsigned char *op; |
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| 282 | unsigned char encoding[7]; |
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| 283 | int index; |
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| 284 | |
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| 285 | static char *kwlist[] = {"index", NULL}; |
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| 286 | |
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| 287 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "i", kwlist, &index)) { |
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| 288 | return NULL; |
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| 289 | } |
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| 290 | |
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| 291 | if (!get_encoding(encoding, sizeof(encoding), self->migemo_obj->charset)) { |
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| 292 | PyErr_SetString(PyExc_AssertionError, "get_encoding() failed"); |
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| 293 | return NULL; |
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| 294 | } |
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| 295 | |
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| 296 | if (op = migemo_get_operator(self->migemo_obj, index)) { |
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| 297 | PyObject *tmp = PyBytes_FromString(op); |
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| 298 | |
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| 299 | if (tmp == NULL) { |
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| 300 | return NULL; |
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| 301 | } |
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| 302 | |
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| 303 | result = PyUnicode_FromEncodedObject(tmp, encoding, "strict"); |
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| 304 | Py_DECREF(tmp); |
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| 305 | return result; |
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| 306 | } |
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| 307 | |
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| 308 | PyErr_SetString(PyExc_ValueError, "invalid opindex"); |
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| 309 | return NULL; |
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| 310 | } |
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| 311 | |
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| 312 | static PyObject * |
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| 313 | Migemo_load(Migemo *self, PyObject *args, PyObject *kwds) |
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| 314 | { |
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| 315 | unsigned char *dict_file; |
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| 316 | int dict_id; |
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| 317 | |
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| 318 | static char *kwlist[] = {"dict_id", "dict_file", NULL}; |
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| 319 | |
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| 320 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "is", kwlist, &dict_id, &dict_file)) { |
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| 321 | return NULL; |
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| 322 | } |
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| 323 | |
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| 324 | if (dict_file) { |
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| 325 | int ret = isloadable(dict_file); |
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| 326 | |
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| 327 | if (ret != 0) { |
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| 328 | PyErr_SetString(PyExc_OSError, strerror(ret)); |
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| 329 | return NULL; |
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| 330 | } |
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| 331 | |
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| 332 | return PyLong_FromLong((long)migemo_load(self->migemo_obj, dict_id, dict_file)); |
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| 333 | } |
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| 334 | |
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| 335 | PyErr_SetString(PyExc_AssertionError, "dict_file is NULL"); |
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| 336 | return NULL; |
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| 337 | } |
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| 338 | |
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| 339 | static PyObject * |
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| 340 | Migemo_is_enable(Migemo *self) |
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| 341 | { |
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| 342 | return PyBool_FromLong((long)migemo_is_enable(self->migemo_obj)); |
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| 343 | } |
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| 344 | |
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| 345 | static PyMethodDef Migemo_methods[] = { |
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| 346 | {"query", (PyCFunction)Migemo_query, METH_VARARGS | METH_KEYWORDS, |
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| 347 | "return regex from string\n\ |
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| 348 | \n\ |
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| 349 | def query(query)\n\ |
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| 350 | query: string\n\ |
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| 351 | \n\ |
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| 352 | returns: regex string"}, |
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| 353 | {"set_operator", (PyCFunction)Migemo_set_operator, METH_VARARGS | METH_KEYWORDS, |
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| 354 | "set operator string as the meta character of regex\n\ |
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| 355 | \n\ |
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| 356 | def set_operator(index, op):\n\ |
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| 357 | index: (OPINDEX_NEST_IN|OPINDEX_NEST_OUT|OPINDEX_NEWLINE|\n\ |
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| 358 | OPINDEX_OR|OPINDEX_SELECT_IN|OPINDEX_SELECT_OUT)\n\ |
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| 359 | op: operator string\n\ |
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| 360 | \n\ |
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| 361 | returns: boolean value"}, |
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| 362 | {"get_operator", (PyCFunction)Migemo_get_operator, METH_VARARGS | METH_KEYWORDS, |
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| 363 | "get operator string as the meta character of regex\n\ |
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| 364 | \n\ |
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| 365 | def get_operator(index)\n\ |
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| 366 | index: (OPINDEX_NEST_IN|OPINDEX_NEST_OUT|OPINDEX_NEWLINE|\n\ |
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| 367 | OPINDEX_OR|OPINDEX_SELECT_IN|OPINDEX_SELECT_OUT)\n\ |
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| 368 | \n\ |
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| 369 | returns: operator string"}, |
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| 370 | {"load", (PyCFunction)Migemo_load, METH_VARARGS | METH_KEYWORDS, |
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| 371 | "add dictionary to Migemo object\n\ |
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| 372 | \n\ |
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| 373 | def load(dict_id, dict_file)\n\ |
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| 374 | dict_id: (DICTID_HAN2ZEN|DICTID_HIRA2KATA|DICTID_MIGEMO|\n\ |
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| 375 | DICTID_ROMA2HIRA|DICTID_ZEN2HAN)\n\ |
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| 376 | dict_file: path to dictionary file\n\ |
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| 377 | \n\ |
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| 378 | returns: ID of loaded dictionary"}, |
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| 379 | {"is_enable", (PyCFunction)Migemo_is_enable, METH_NOARGS, |
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| 380 | "check internal migemo_dict\n\ |
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| 381 | \n\ |
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| 382 | def is_enable()\n\ |
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| 383 | returns: boolean value"}, |
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| 384 | {"get_encoding", (PyCFunction)Migemo_get_encoding, METH_NOARGS, |
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| 385 | "get dictionary encoding\n\ |
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| 386 | \n\ |
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| 387 | def get_encoding()\n\ |
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| 388 | returns: encoding string"}, |
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| 389 | {NULL} /* Sentinel */ |
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| 390 | }; |
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| 391 | |
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| 392 | static PyMemberDef Migemo_members[] = { |
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| 393 | {NULL} /* Sentinel */ |
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| 394 | }; |
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| 395 | |
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| 396 | #ifndef PyVarObject_HEAD_INIT |
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| 397 | # define PyVarObject_HEAD_INIT(type, size) PyObject_HEAD_INIT(type) size, |
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| 398 | #endif |
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| 399 | |
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| 400 | static PyTypeObject MigemoType = { |
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| 401 | PyVarObject_HEAD_INIT(NULL, 0) |
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| 402 | "migemo.Migemo", /*tp_name*/ |
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| 403 | sizeof(Migemo), /*tp_basicsize*/ |
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| 404 | 0, /*tp_itemsize*/ |
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| 405 | (destructor)Migemo_dealloc, /*tp_dealloc*/ |
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| 406 | 0, /*tp_print*/ |
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| 407 | 0, /*tp_getattr*/ |
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| 408 | 0, /*tp_setattr*/ |
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| 409 | 0, /*tp_compare*/ |
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| 410 | 0, /*tp_repr*/ |
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| 411 | 0, /*tp_as_number*/ |
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| 412 | 0, /*tp_as_sequence*/ |
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| 413 | 0, /*tp_as_mapping*/ |
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| 414 | 0, /*tp_hash */ |
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| 415 | 0, /*tp_call*/ |
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| 416 | 0, /*tp_str*/ |
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| 417 | 0, /*tp_getattro*/ |
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| 418 | 0, /*tp_setattro*/ |
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| 419 | 0, /*tp_as_buffer*/ |
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| 420 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
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| 421 | "", /* tp_doc */ |
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| 422 | 0, /* tp_traverse */ |
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| 423 | 0, /* tp_clear */ |
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| 424 | 0, /* tp_richcompare */ |
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| 425 | 0, /* tp_weaklistoffset */ |
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| 426 | 0, /* tp_iter */ |
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| 427 | 0, /* tp_iternext */ |
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| 428 | Migemo_methods, /* tp_methods */ |
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| 429 | Migemo_members, /* tp_members */ |
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| 430 | 0, /* tp_getset */ |
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| 431 | 0, /* tp_base */ |
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| 432 | 0, /* tp_dict */ |
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| 433 | 0, /* tp_descr_get */ |
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| 434 | 0, /* tp_descr_set */ |
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| 435 | 0, /* tp_dictoffset */ |
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| 436 | (initproc)Migemo_init, /* tp_init */ |
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| 437 | 0, /* tp_alloc */ |
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| 438 | Migemo_new, /* tp_new */ |
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| 439 | }; |
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| 440 | |
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| 441 | #define PYMIGEMO_MODULEDOC "C/Migemo Python binding" |
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| 442 | |
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| 443 | static PyMethodDef module_methods[] = { |
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| 444 | {NULL} /* Sentinel */ |
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| 445 | }; |
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| 446 | |
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| 447 | #ifdef PYTHON3 |
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| 448 | static struct PyModuleDef moduledef = { |
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| 449 | PyModuleDef_HEAD_INIT, |
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| 450 | "migemo", /* m_name */ |
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| 451 | PYMIGEMO_MODULEDOC, /* m_doc */ |
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| 452 | -1, /* m_size */ |
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| 453 | module_methods, /* m_methods */ |
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| 454 | NULL, /* m_reload */ |
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| 455 | NULL, /* m_traverse */ |
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| 456 | NULL, /* m_clear */ |
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| 457 | NULL, /* m_free */ |
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| 458 | }; |
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| 459 | #endif |
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| 460 | |
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| 461 | #ifdef PYTHON3 |
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| 462 | # define MOD_INIT(name) PyObject *PyInit_##name(void) |
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| 463 | #else |
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| 464 | # define MOD_INIT(name) void init##name(void) |
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| 465 | #endif |
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| 466 | |
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| 467 | MOD_INIT(migemo) |
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| 468 | { |
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| 469 | PyObject* m; |
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| 470 | |
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| 471 | if (PyType_Ready(&MigemoType) < 0) |
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| 472 | return; |
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| 473 | |
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| 474 | #ifdef PYTHON3 |
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| 475 | m = PyModule_Create(&moduledef); |
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| 476 | #else |
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| 477 | m = Py_InitModule3("migemo", module_methods, PYMIGEMO_MODULEDOC); |
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| 478 | #endif |
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| 479 | |
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| 480 | if (m == NULL) { |
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| 481 | #ifdef PYTHON3 |
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| 482 | return NULL; |
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| 483 | #else |
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| 484 | return; |
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| 485 | #endif |
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| 486 | } |
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| 487 | |
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| 488 | Py_INCREF(&MigemoType); |
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| 489 | PyModule_AddObject(m, "Migemo", (PyObject *)&MigemoType); |
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| 490 | PyModule_AddObject(m, "PYMIGEMO_VERSION", Py_BuildValue("s", PYMIGEMO_VERSION)); |
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| 491 | |
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| 492 | PyModule_AddObject(m, "MIGEMO_VERSION", Py_BuildValue("s", MIGEMO_VERSION)); |
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| 493 | |
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| 494 | PyModule_AddObject(m, "DICTID_INVALID", Py_BuildValue("i", MIGEMO_DICTID_INVALID)); |
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| 495 | PyModule_AddObject(m, "DICTID_MIGEMO", Py_BuildValue("i", MIGEMO_DICTID_MIGEMO)); |
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| 496 | PyModule_AddObject(m, "DICTID_ROMA2HIRA", Py_BuildValue("i", MIGEMO_DICTID_ROMA2HIRA)); |
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| 497 | PyModule_AddObject(m, "DICTID_HIRA2KATA", Py_BuildValue("i", MIGEMO_DICTID_HIRA2KATA)); |
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| 498 | PyModule_AddObject(m, "DICTID_HAN2ZEN", Py_BuildValue("i", MIGEMO_DICTID_HAN2ZEN)); |
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| 499 | PyModule_AddObject(m, "DICTID_ZEN2HAN", Py_BuildValue("i", MIGEMO_DICTID_ZEN2HAN)); |
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| 500 | |
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| 501 | PyModule_AddObject(m, "OPINDEX_OR", Py_BuildValue("i", MIGEMO_OPINDEX_OR)); |
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| 502 | PyModule_AddObject(m, "OPINDEX_NEST_IN", Py_BuildValue("i", MIGEMO_OPINDEX_NEST_IN)); |
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| 503 | PyModule_AddObject(m, "OPINDEX_NEST_OUT", Py_BuildValue("i", MIGEMO_OPINDEX_NEST_OUT)); |
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| 504 | PyModule_AddObject(m, "OPINDEX_SELECT_IN", Py_BuildValue("i", MIGEMO_OPINDEX_SELECT_IN)); |
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| 505 | PyModule_AddObject(m, "OPINDEX_SELECT_OUT", Py_BuildValue("i", MIGEMO_OPINDEX_SELECT_OUT)); |
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| 506 | PyModule_AddObject(m, "OPINDEX_NEWLINE", Py_BuildValue("i", MIGEMO_OPINDEX_NEWLINE)); |
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| 507 | |
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| 508 | #ifdef PYTHON3 |
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| 509 | return m; |
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| 510 | #endif |
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| 511 | } |
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