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