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/*
* multibytecodec.c: Common Multibyte Codec Implementation
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
*/
#include "multibytecodec.h"
#include "cjkcodecs.h"
#include "codecs_cn.h"
#include "codecs_hk.h"
#include "codecs_jp.h"
#include "codecs_kr.h"
#include "codecs_tw.h"
#include "codecs_iso2022.h"
#include <stddef.h>
#include <string.h>
#define MBCM_MAX 7
struct MultibyteCodecModule {
const char *name;
const struct dbcs_map *mappings;
const MultibyteCodec *codecs;
};
static struct MultibyteCodecModule *
mbcms_init(struct MultibyteCodecModule mbcs[])
{
size_t i = 0;
#define MBCM_SET(mod) \
do { \
mbcs[i].name = #mod; \
mbcs[i].mappings = mod##_mapping_list; \
mbcs[i].codecs = mod##_codec_list; \
i++; \
} while(0);
#define MBCM_END() \
do { \
mbcs[i].name = NULL; \
mbcs[i].mappings = NULL; \
mbcs[i].codecs = NULL; \
i++; \
} while(0);
MBCM_SET(cn);
MBCM_SET(hk);
MBCM_SET(kr);
MBCM_SET(jp);
MBCM_SET(tw);
MBCM_SET(iso2022);
MBCM_END()
return mbcs;
}
struct MultibyteCodecModule*
mbc_find(struct MultibyteCodecModule *mbcms,
const char *modname)
{
int i;
for (i = 0; mbcms[i].name; i++)
if (!strcmp (mbcms[i].name, modname))
return &mbcms[i];
return NULL;
}
static const MultibyteCodec*
mbc_module_find_codec(struct MultibyteCodecModule* module,
const char *encoding)
{
int i;
for (i = 0; module->codecs[i].encoding && module->codecs[i].encoding[0]; i++)
if (!strcmp (module->codecs[i].encoding, encoding))
return &module->codecs[i];
return NULL;
}
int
mbc_importmap(const char *modname, const char *symbol,
const void **encmap, const void **decmap)
{
struct MultibyteCodecModule mbcms[MBCM_MAX];
struct MultibyteCodecModule* module;
const struct dbcs_map *map;
module = mbc_find(mbcms_init(mbcms), modname);
if (!module)
return -1;
map = module->mappings;
for (; map->charset; map++)
if (!strcmp (map->charset, symbol))
break;
if (!map->charset)
return -1;
if (encmap != NULL)
*encmap = map->encmap;
if (decmap != NULL)
*decmap = map->decmap;
return 0;
}
int
mbcs_init(MultibyteCodecState *state,
const char *modname,
const char* encoding)
{
struct MultibyteCodecModule mbcms[MBCM_MAX];
struct MultibyteCodecModule* module;
memset(state, 0, sizeof(MultibyteCodecState));
module = mbc_find(mbcms_init(mbcms), modname);
if (!module)
return -1;
state->codec = mbc_module_find_codec(module, encoding);
if (!state->codec)
return -1;
if (state->codec->codecinit && state->codec->codecinit(state->codec->config))
return -1;
mbcs_decode_init(state);
return 0;
}
int
mbcs_decode(MultibyteCodecState *state,
const char** inbuf, size_t inlen,
ucs4_t** outbuf, size_t outlen)
{
return state->codec->decode(&state->state, state->codec->config,
(const unsigned char**)inbuf, inlen,
outbuf, outlen);
}
void
mbcs_decode_init(MultibyteCodecState *state)
{
if (state->codec->decinit)
state->codec->decinit(&state->state, state->codec->config);
}
int
mbcs_decode_reset(MultibyteCodecState *state)
{
if (state->codec->decreset)
return state->codec->decreset(&state->state,
state->codec->config);
return 0;
}
int
mbcs_encode(MultibyteCodecState *state,
const ucs4_t** inbuf, size_t inlen,
char** outbuf, size_t outlen,
int flags)
{
return state->codec->encode(&state->state,
state->codec->config,
inbuf, inlen,
(unsigned char **)outbuf, outlen,
flags);
}
void
mbcs_encode_init(MultibyteCodecState *state)
{
if (state->codec->encinit)
state->codec->encinit(&state->state, state->codec->config);
}
int
mbcs_encode_reset(MultibyteCodecState *state,
char **outbuf, int outleft)
{
if (state->codec->encreset)
return state->codec->encreset(&state->state, state->codec->config,
(unsigned char **)outbuf, outleft);
return 0;
}
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