| /* | |
| * cjkcodecs.h: common header for cjkcodecs | |
| * | |
| * Written by Hye-Shik Chang <perky@FreeBSD.org> | |
| */ | |
| #ifndef _CJKCODECS_H_ | |
| #define _CJKCODECS_H_ | |
| #define PY_SSIZE_T_CLEAN | |
| #include "Python.h" | |
| #include "multibytecodec.h" | |
| /* a unicode "undefined" codepoint */ | |
| #define UNIINV 0xFFFE | |
| /* internal-use DBCS codepoints which aren't used by any charsets */ | |
| #define NOCHAR 0xFFFF | |
| #define MULTIC 0xFFFE | |
| #define DBCINV 0xFFFD | |
| /* shorter macros to save source size of mapping tables */ | |
| #define U UNIINV | |
| #define N NOCHAR | |
| #define M MULTIC | |
| #define D DBCINV | |
| struct dbcs_index { | |
| const ucs2_t *map; | |
| unsigned char bottom, top; | |
| }; | |
| typedef struct dbcs_index decode_map; | |
| struct widedbcs_index { | |
| const ucs4_t *map; | |
| unsigned char bottom, top; | |
| }; | |
| typedef struct widedbcs_index widedecode_map; | |
| struct unim_index { | |
| const DBCHAR *map; | |
| unsigned char bottom, top; | |
| }; | |
| typedef struct unim_index encode_map; | |
| struct unim_index_bytebased { | |
| const unsigned char *map; | |
| unsigned char bottom, top; | |
| }; | |
| struct dbcs_map { | |
| const char *charset; | |
| const struct unim_index *encmap; | |
| const struct dbcs_index *decmap; | |
| }; | |
| struct pair_encodemap { | |
| ucs4_t uniseq; | |
| DBCHAR code; | |
| }; | |
| static const MultibyteCodec *codec_list; | |
| static const struct dbcs_map *mapping_list; | |
| #define CODEC_INIT(encoding) \ | |
| static int encoding##_codec_init(const void *config) | |
| #define ENCODER_INIT(encoding) \ | |
| static int encoding##_encode_init( \ | |
| MultibyteCodec_State *state, const void *config) | |
| #define ENCODER(encoding) \ | |
| static Py_ssize_t encoding##_encode( \ | |
| MultibyteCodec_State *state, const void *config, \ | |
| const Py_UNICODE **inbuf, Py_ssize_t inleft, \ | |
| unsigned char **outbuf, Py_ssize_t outleft, int flags) | |
| #define ENCODER_RESET(encoding) \ | |
| static Py_ssize_t encoding##_encode_reset( \ | |
| MultibyteCodec_State *state, const void *config, \ | |
| unsigned char **outbuf, Py_ssize_t outleft) | |
| #define DECODER_INIT(encoding) \ | |
| static int encoding##_decode_init( \ | |
| MultibyteCodec_State *state, const void *config) | |
| #define DECODER(encoding) \ | |
| static Py_ssize_t encoding##_decode( \ | |
| MultibyteCodec_State *state, const void *config, \ | |
| const unsigned char **inbuf, Py_ssize_t inleft, \ | |
| Py_UNICODE **outbuf, Py_ssize_t outleft) | |
| #define DECODER_RESET(encoding) \ | |
| static Py_ssize_t encoding##_decode_reset( \ | |
| MultibyteCodec_State *state, const void *config) | |
| #if Py_UNICODE_SIZE == 4 | |
| #define UCS4INVALID(code) \ | |
| if ((code) > 0xFFFF) \ | |
| return 1; | |
| #else | |
| #define UCS4INVALID(code) \ | |
| if (0) ; | |
| #endif | |
| #define NEXT_IN(i) \ | |
| (*inbuf) += (i); \ | |
| (inleft) -= (i); | |
| #define NEXT_OUT(o) \ | |
| (*outbuf) += (o); \ | |
| (outleft) -= (o); | |
| #define NEXT(i, o) \ | |
| NEXT_IN(i) NEXT_OUT(o) | |
| #define REQUIRE_INBUF(n) \ | |
| if (inleft < (n)) \ | |
| return MBERR_TOOFEW; | |
| #define REQUIRE_OUTBUF(n) \ | |
| if (outleft < (n)) \ | |
| return MBERR_TOOSMALL; | |
| #define IN1 ((*inbuf)[0]) | |
| #define IN2 ((*inbuf)[1]) | |
| #define IN3 ((*inbuf)[2]) | |
| #define IN4 ((*inbuf)[3]) | |
| #define OUT1(c) ((*outbuf)[0]) = (c); | |
| #define OUT2(c) ((*outbuf)[1]) = (c); | |
| #define OUT3(c) ((*outbuf)[2]) = (c); | |
| #define OUT4(c) ((*outbuf)[3]) = (c); | |
| #define WRITE1(c1) \ | |
| REQUIRE_OUTBUF(1) \ | |
| (*outbuf)[0] = (c1); | |
| #define WRITE2(c1, c2) \ | |
| REQUIRE_OUTBUF(2) \ | |
| (*outbuf)[0] = (c1); \ | |
| (*outbuf)[1] = (c2); | |
| #define WRITE3(c1, c2, c3) \ | |
| REQUIRE_OUTBUF(3) \ | |
| (*outbuf)[0] = (c1); \ | |
| (*outbuf)[1] = (c2); \ | |
| (*outbuf)[2] = (c3); | |
| #define WRITE4(c1, c2, c3, c4) \ | |
| REQUIRE_OUTBUF(4) \ | |
| (*outbuf)[0] = (c1); \ | |
| (*outbuf)[1] = (c2); \ | |
| (*outbuf)[2] = (c3); \ | |
| (*outbuf)[3] = (c4); | |
| #if Py_UNICODE_SIZE == 2 | |
| # define WRITEUCS4(c) \ | |
| REQUIRE_OUTBUF(2) \ | |
| (*outbuf)[0] = 0xd800 + (((c) - 0x10000) >> 10); \ | |
| (*outbuf)[1] = 0xdc00 + (((c) - 0x10000) & 0x3ff); \ | |
| NEXT_OUT(2) | |
| #else | |
| # define WRITEUCS4(c) \ | |
| REQUIRE_OUTBUF(1) \ | |
| **outbuf = (Py_UNICODE)(c); \ | |
| NEXT_OUT(1) | |
| #endif | |
| #define _TRYMAP_ENC(m, assi, val) \ | |
| ((m)->map != NULL && (val) >= (m)->bottom && \ | |
| (val)<= (m)->top && ((assi) = (m)->map[(val) - \ | |
| (m)->bottom]) != NOCHAR) | |
| #define TRYMAP_ENC_COND(charset, assi, uni) \ | |
| _TRYMAP_ENC(&charset##_encmap[(uni) >> 8], assi, (uni) & 0xff) | |
| #define TRYMAP_ENC(charset, assi, uni) \ | |
| if TRYMAP_ENC_COND(charset, assi, uni) | |
| #define _TRYMAP_DEC(m, assi, val) \ | |
| ((m)->map != NULL && (val) >= (m)->bottom && \ | |
| (val)<= (m)->top && ((assi) = (m)->map[(val) - \ | |
| (m)->bottom]) != UNIINV) | |
| #define TRYMAP_DEC(charset, assi, c1, c2) \ | |
| if _TRYMAP_DEC(&charset##_decmap[c1], assi, c2) | |
| #define _TRYMAP_ENC_MPLANE(m, assplane, asshi, asslo, val) \ | |
| ((m)->map != NULL && (val) >= (m)->bottom && \ | |
| (val)<= (m)->top && \ | |
| ((assplane) = (m)->map[((val) - (m)->bottom)*3]) != 0 && \ | |
| (((asshi) = (m)->map[((val) - (m)->bottom)*3 + 1]), 1) && \ | |
| (((asslo) = (m)->map[((val) - (m)->bottom)*3 + 2]), 1)) | |
| #define TRYMAP_ENC_MPLANE(charset, assplane, asshi, asslo, uni) \ | |
| if _TRYMAP_ENC_MPLANE(&charset##_encmap[(uni) >> 8], \ | |
| assplane, asshi, asslo, (uni) & 0xff) | |
| #define TRYMAP_DEC_MPLANE(charset, assi, plane, c1, c2) \ | |
| if _TRYMAP_DEC(&charset##_decmap[plane][c1], assi, c2) | |
| #if Py_UNICODE_SIZE == 2 | |
| #define DECODE_SURROGATE(c) \ | |
| if (c >> 10 == 0xd800 >> 10) { /* high surrogate */ \ | |
| REQUIRE_INBUF(2) \ | |
| if (IN2 >> 10 == 0xdc00 >> 10) { /* low surrogate */ \ | |
| c = 0x10000 + ((ucs4_t)(c - 0xd800) << 10) + \ | |
| ((ucs4_t)(IN2) - 0xdc00); \ | |
| } \ | |
| } | |
| #define GET_INSIZE(c) ((c) > 0xffff ? 2 : 1) | |
| #else | |
| #define DECODE_SURROGATE(c) {;} | |
| #define GET_INSIZE(c) 1 | |
| #endif | |
| #define BEGIN_MAPPINGS_LIST static const struct dbcs_map _mapping_list[] = { | |
| #define MAPPING_ENCONLY(enc) {#enc, (void*)enc##_encmap, NULL}, | |
| #define MAPPING_DECONLY(enc) {#enc, NULL, (void*)enc##_decmap}, | |
| #define MAPPING_ENCDEC(enc) {#enc, (void*)enc##_encmap, (void*)enc##_decmap}, | |
| #define END_MAPPINGS_LIST \ | |
| {"", NULL, NULL} }; \ | |
| static const struct dbcs_map *mapping_list = \ | |
| (const struct dbcs_map *)_mapping_list; | |
| #define BEGIN_CODECS_LIST static const MultibyteCodec _codec_list[] = { | |
| #define _STATEFUL_METHODS(enc) \ | |
| enc##_encode, \ | |
| enc##_encode_init, \ | |
| enc##_encode_reset, \ | |
| enc##_decode, \ | |
| enc##_decode_init, \ | |
| enc##_decode_reset, | |
| #define _STATELESS_METHODS(enc) \ | |
| enc##_encode, NULL, NULL, \ | |
| enc##_decode, NULL, NULL, | |
| #define CODEC_STATEFUL(enc) { \ | |
| #enc, NULL, NULL, \ | |
| _STATEFUL_METHODS(enc) \ | |
| }, | |
| #define CODEC_STATELESS(enc) { \ | |
| #enc, NULL, NULL, \ | |
| _STATELESS_METHODS(enc) \ | |
| }, | |
| #define CODEC_STATELESS_WINIT(enc) { \ | |
| #enc, NULL, \ | |
| enc##_codec_init, \ | |
| _STATELESS_METHODS(enc) \ | |
| }, | |
| #define END_CODECS_LIST \ | |
| {"", NULL,} }; \ | |
| static const MultibyteCodec *codec_list = \ | |
| (const MultibyteCodec *)_codec_list; | |
| static PyObject * | |
| getmultibytecodec(void) | |
| { | |
| static PyObject *cofunc = NULL; | |
| if (cofunc == NULL) { | |
| PyObject *mod = PyImport_ImportModuleNoBlock("_multibytecodec"); | |
| if (mod == NULL) | |
| return NULL; | |
| cofunc = PyObject_GetAttrString(mod, "__create_codec"); | |
| Py_DECREF(mod); | |
| } | |
| return cofunc; | |
| } | |
| static PyObject * | |
| getcodec(PyObject *self, PyObject *encoding) | |
| { | |
| PyObject *codecobj, *r, *cofunc; | |
| const MultibyteCodec *codec; | |
| const char *enc; | |
| if (!PyString_Check(encoding)) { | |
| PyErr_SetString(PyExc_TypeError, | |
| "encoding name must be a string."); | |
| return NULL; | |
| } | |
| cofunc = getmultibytecodec(); | |
| if (cofunc == NULL) | |
| return NULL; | |
| enc = PyString_AS_STRING(encoding); | |
| for (codec = codec_list; codec->encoding[0]; codec++) | |
| if (strcmp(codec->encoding, enc) == 0) | |
| break; | |
| if (codec->encoding[0] == '\0') { | |
| PyErr_SetString(PyExc_LookupError, | |
| "no such codec is supported."); | |
| return NULL; | |
| } | |
| codecobj = PyCapsule_New((void *)codec, PyMultibyteCodec_CAPSULE_NAME, NULL); | |
| if (codecobj == NULL) | |
| return NULL; | |
| r = PyObject_CallFunctionObjArgs(cofunc, codecobj, NULL); | |
| Py_DECREF(codecobj); | |
| return r; | |
| } | |
| static struct PyMethodDef __methods[] = { | |
| {"getcodec", (PyCFunction)getcodec, METH_O, ""}, | |
| {NULL, NULL}, | |
| }; | |
| static int | |
| register_maps(PyObject *module) | |
| { | |
| const struct dbcs_map *h; | |
| for (h = mapping_list; h->charset[0] != '\0'; h++) { | |
| char mhname[256] = "__map_"; | |
| int r; | |
| strcpy(mhname + sizeof("__map_") - 1, h->charset); | |
| r = PyModule_AddObject(module, mhname, | |
| PyCapsule_New((void *)h, PyMultibyteCodec_CAPSULE_NAME, NULL)); | |
| if (r == -1) | |
| return -1; | |
| } | |
| return 0; | |
| } | |
| #ifdef USING_BINARY_PAIR_SEARCH | |
| static DBCHAR | |
| find_pairencmap(ucs2_t body, ucs2_t modifier, | |
| const struct pair_encodemap *haystack, int haystacksize) | |
| { | |
| int pos, min, max; | |
| ucs4_t value = body << 16 | modifier; | |
| min = 0; | |
| max = haystacksize; | |
| for (pos = haystacksize >> 1; min != max; pos = (min + max) >> 1) | |
| if (value < haystack[pos].uniseq) { | |
| if (max == pos) break; | |
| else max = pos; | |
| } | |
| else if (value > haystack[pos].uniseq) { | |
| if (min == pos) break; | |
| else min = pos; | |
| } | |
| else | |
| break; | |
| if (value == haystack[pos].uniseq) | |
| return haystack[pos].code; | |
| else | |
| return DBCINV; | |
| } | |
| #endif | |
| #ifdef USING_IMPORTED_MAPS | |
| #define IMPORT_MAP(locale, charset, encmap, decmap) \ | |
| importmap("_codecs_" #locale, "__map_" #charset, \ | |
| (const void**)encmap, (const void**)decmap) | |
| static int | |
| importmap(const char *modname, const char *symbol, | |
| const void **encmap, const void **decmap) | |
| { | |
| PyObject *o, *mod; | |
| mod = PyImport_ImportModule((char *)modname); | |
| if (mod == NULL) | |
| return -1; | |
| o = PyObject_GetAttrString(mod, (char*)symbol); | |
| if (o == NULL) | |
| goto errorexit; | |
| else if (!PyCapsule_IsValid(o, PyMultibyteCodec_CAPSULE_NAME)) { | |
| PyErr_SetString(PyExc_ValueError, | |
| "map data must be a Capsule."); | |
| goto errorexit; | |
| } | |
| else { | |
| struct dbcs_map *map; | |
| map = PyCapsule_GetPointer(o, PyMultibyteCodec_CAPSULE_NAME); | |
| if (encmap != NULL) | |
| *encmap = map->encmap; | |
| if (decmap != NULL) | |
| *decmap = map->decmap; | |
| Py_DECREF(o); | |
| } | |
| Py_DECREF(mod); | |
| return 0; | |
| errorexit: | |
| Py_DECREF(mod); | |
| return -1; | |
| } | |
| #endif | |
| #define I_AM_A_MODULE_FOR(loc) \ | |
| void \ | |
| init_codecs_##loc(void) \ | |
| { \ | |
| PyObject *m = Py_InitModule("_codecs_" #loc, __methods);\ | |
| if (m != NULL) \ | |
| (void)register_maps(m); \ | |
| } | |
| #endif |