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gh-103583: Isolate CJK modules, alternative 1 #103868

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24bf1dd
Add codec deinit callback
erlend-aasland Apr 16, 2023
e1713e9
Deinit codecs at cjk module free
erlend-aasland Apr 16, 2023
5b8324d
Proof of concept: put big5 map pointers on heap
erlend-aasland Apr 16, 2023
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Proof of concept: put big5 map pointers on heap
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@erlend-aasland
erlend-aasland committed Apr 25, 2023
commit 5b8324dfb059da887090ea061f02b85911b60935
33 changes: 24 additions & 9 deletions Modules/cjkcodecs/_codecs_hk.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,21 +13,28 @@
* BIG5HKSCS codec
*/

static const encode_map *big5_encmap = NULL;
static const decode_map *big5_decmap = NULL;
typedef struct {
const encode_map *big5_encmap;
const decode_map *big5_decmap;
int initialized;
} big5_state;

CODEC_INIT(big5hkscs)
{
static int initialized = 0;

if (!initialized && IMPORT_MAP(tw, big5, &big5_encmap, &big5_decmap))
big5_state *st = (big5_state *)config;
if (st->initialized) {
return 0;
}
if (IMPORT_MAP(tw, big5, &st->big5_encmap, &st->big5_decmap)) {
return -1;
initialized = 1;
}
st->initialized = 1;
return 0;
}

CODEC_DEINIT(big5hkscs)
{
PyMem_Free((void *)config);
return 0;
}

Expand Down Expand Up @@ -58,6 +65,7 @@ ENCODER(big5hkscs)
insize = 1;
REQUIRE_OUTBUF(2);

big5_state *st = (big5_state *)config;
if (c < 0x10000) {
if (TRYMAP_ENC(big5hkscs_bmp, code, c)) {
if (code == MULTIC) {
Expand Down Expand Up @@ -86,7 +94,7 @@ ENCODER(big5hkscs)
}
}
}
else if (TRYMAP_ENC(big5, code, c))
else if (TRYMAP_ENC_PTR(st->big5_encmap, code, c))
;
else
return 1;
Expand Down Expand Up @@ -127,7 +135,8 @@ DECODER(big5hkscs)
REQUIRE_INBUF(2);

if (0xc6 > c || c > 0xc8 || (c < 0xc7 && INBYTE2 < 0xa1)) {
if (TRYMAP_DEC(big5, decoded, c, INBYTE2)) {
big5_state *st = (big5_state *)config;
if (TRYMAP_DEC_PTR(st->big5_decmap, decoded, c, INBYTE2)) {
OUTCHAR(decoded);
NEXT_IN(2);
continue;
Expand Down Expand Up @@ -189,7 +198,13 @@ BEGIN_MAPPINGS_LIST(3)
END_MAPPINGS_LIST

BEGIN_CODECS_LIST(1)
CODEC_STATELESS_WINIT(big5hkscs)
{
big5_state *config = PyMem_Calloc(1, sizeof(big5_state));
if (config == NULL) {
return -1;
}
CODEC_STATELESS_WINIT(big5hkscs, config)
}
END_CODECS_LIST

I_AM_A_MODULE_FOR(hk)
9 changes: 6 additions & 3 deletions Modules/cjkcodecs/cjkcodecs.h
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Expand Up @@ -208,6 +208,8 @@ get_module_state(PyObject *mod)
(m)->bottom]) != NOCHAR)
#define TRYMAP_ENC(charset, assi, uni) \
_TRYMAP_ENC(&charset##_encmap[(uni) >> 8], assi, (uni) & 0xff)
#define TRYMAP_ENC_PTR(map, assi, uni) \
_TRYMAP_ENC(&(map)[(uni) >> 8], assi, (uni) & 0xff)

#define _TRYMAP_DEC(m, assi, val) \
((m)->map != NULL && \
Expand All @@ -216,6 +218,8 @@ get_module_state(PyObject *mod)
((assi) = (m)->map[(val) - (m)->bottom]) != UNIINV)
#define TRYMAP_DEC(charset, assi, c1, c2) \
_TRYMAP_DEC(&charset##_decmap[c1], assi, c2)
#define TRYMAP_DEC_PTR(map, assi, c1, c2) \
_TRYMAP_DEC(&(map)[c1], assi, c2)

#define BEGIN_MAPPINGS_LIST(NUM) \
static int \
Expand Down Expand Up @@ -273,8 +277,8 @@ add_codecs(cjkcodecs_module_state *st) \
#define CODEC_STATELESS(enc) \
NEXT_CODEC = (MultibyteCodec){#enc, NULL, NULL, NULL, \
_STATELESS_METHODS(enc)};
#define CODEC_STATELESS_WINIT(enc) \
NEXT_CODEC = (MultibyteCodec){#enc, NULL, \
#define CODEC_STATELESS_WINIT(enc, config) \
NEXT_CODEC = (MultibyteCodec){#enc, config, \
enc##_codec_init, enc##_codec_deinit, \
_STATELESS_METHODS(enc)};

Expand Down Expand Up @@ -483,7 +487,6 @@ deinit_codecs(PyObject *mod)
for (int i = 0; i < st->num_codecs; i++) {
const MultibyteCodec *codec = &st->codec_list[i];
if (codec && codec->codecdeinit) {
fprintf(stderr, "- deinit[%d]: %s\n", i, codec->encoding);
if (codec->codecdeinit(codec->config) < 0) {
PyErr_WriteUnraisable(mod);
}
Expand Down
3 changes: 0 additions & 3 deletions Tools/c-analyzer/cpython/globals-to-fix.tsv
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Expand Up @@ -485,9 +485,6 @@ Modules/_decimal/_decimal.c - _py_float_abs -
Modules/_decimal/_decimal.c - _py_long_bit_length -
Modules/_decimal/_decimal.c - _py_float_as_integer_ratio -
Modules/_elementtree.c - expat_capi -
Modules/cjkcodecs/_codecs_hk.c - big5_encmap -
Modules/cjkcodecs/_codecs_hk.c - big5_decmap -
Modules/cjkcodecs/_codecs_hk.c big5hkscs_codec_init initialized -
Modules/cjkcodecs/_codecs_iso2022.c - cp949_encmap -
Modules/cjkcodecs/_codecs_iso2022.c - ksx1001_decmap -
Modules/cjkcodecs/_codecs_iso2022.c - jisxcommon_encmap -
Expand Down