diff options
Diffstat (limited to 'iconv/gconv_simple.c')
| -rw-r--r-- | iconv/gconv_simple.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c index 197a3d1..478c0dc 100644 --- a/iconv/gconv_simple.c +++ b/iconv/gconv_simple.c @@ -76,6 +76,234 @@ __gconv_transform_dummy (struct gconv_step *step, struct gconv_step_data *data, } +/* Convert from ISO 646-IRV to ISO 10646/UCS4. */ +int +__gconv_transform_ascii_ucs4 (struct gconv_step *step, + struct gconv_step_data *data, const char *inbuf, + size_t *inlen, size_t *written, int do_flush) +{ + struct gconv_step *next_step = step + 1; + struct gconv_step_data *next_data = data + 1; + gconv_fct fct = next_step->fct; + size_t do_write; + int result; + + /* If the function is called with no input this means we have to reset + to the initial state. The possibly partly converted input is + dropped. */ + if (do_flush) + { + /* Clear the state. */ + memset (data->statep, '\0', sizeof (mbstate_t)); + do_write = 0; + + /* Call the steps down the chain if there are any. */ + if (data->is_last) + result = GCONV_OK; + else + { + struct gconv_step *next_step = step + 1; + struct gconv_step_data *next_data = data + 1; + + result = (*fct) (next_step, next_data, NULL, 0, written, 1); + + /* Clear output buffer. */ + data->outbufavail = 0; + } + } + else + { + int save_errno = errno; + do_write = 0; + + result = GCONV_OK; + do + { + const unsigned char *newinbuf = inbuf; + size_t actually = 0; + size_t cnt = 0; + + while (data->outbufavail + sizeof (wchar_t) <= data->outbufsize + && cnt < *inlen) + { + if (*newinbuf > '\x7f') + { + /* This is no correct ANSI_X3.4-1968 character. */ + result = GCONV_ILLEGAL_INPUT; + break; + } + + /* It's an one byte sequence. */ + *(wchar_t *) &data->outbuf[data->outbufavail++] + = (wchar_t) *newinbuf; + ++actually; + + ++newinbuf; + ++cnt; + } + + /* Remember how much we converted. */ + do_write += cnt * sizeof (wchar_t); + *inlen -= cnt; + + /* Check whether an illegal character appeared. */ + if (result != GCONV_OK) + break; + + if (data->is_last) + { + /* This is the last step. */ + result = (*inlen == 0 ? GCONV_EMPTY_INPUT : GCONV_FULL_OUTPUT); + break; + } + + /* Status so far. */ + result = GCONV_EMPTY_INPUT; + + if (data->outbufavail > 0) + { + /* Call the functions below in the chain. */ + size_t newavail = data->outbufavail; + + result = (*fct) (next_step, next_data, data->outbuf, &newavail, + written, 0); + + /* Correct the output buffer. */ + if (newavail != data->outbufavail && newavail > 0) + { + memmove (data->outbuf, + &data->outbuf[data->outbufavail - newavail], + newavail); + data->outbufavail = newavail; + } + } + } + while (*inlen > 0 && result == GCONV_EMPTY_INPUT); + + __set_errno (save_errno); + } + + if (written != NULL && data->is_last) + *written = do_write / sizeof (wchar_t); + + return result; +} + + +/* Convert from ISO 10646/UCS to ISO 646-IRV. */ +int +__gconv_transform_ucs4_ascii (struct gconv_step *step, + struct gconv_step_data *data, const char *inbuf, + size_t *inlen, size_t *written, int do_flush) +{ + struct gconv_step *next_step = step + 1; + struct gconv_step_data *next_data = data + 1; + gconv_fct fct = next_step->fct; + size_t do_write; + int result; + + /* If the function is called with no input this means we have to reset + to the initial state. The possibly partly converted input is + dropped. */ + if (do_flush) + { + /* Clear the state. */ + memset (data->statep, '\0', sizeof (mbstate_t)); + do_write = 0; + + /* Call the steps down the chain if there are any. */ + if (data->is_last) + result = GCONV_OK; + else + { + struct gconv_step *next_step = step + 1; + struct gconv_step_data *next_data = data + 1; + + result = (*fct) (next_step, next_data, NULL, 0, written, 1); + + /* Clear output buffer. */ + data->outbufavail = 0; + } + } + else + { + int save_errno = errno; + do_write = 0; + + result = GCONV_OK; + do + { + const wchar_t *newinbuf = (const wchar_t *) inbuf; + size_t actually = 0; + size_t cnt = 0; + + while (data->outbufavail < data->outbufsize + && cnt + sizeof (wchar_t) <= *inlen) + { + if (*newinbuf < L'\0' || *newinbuf > L'\x7f') + { + /* This is no correct ANSI_X3.4-1968 character. */ + result = GCONV_ILLEGAL_INPUT; + break; + } + + /* It's an one byte sequence. */ + data->outbuf[data->outbufavail++] = (char) *newinbuf; + ++actually; + + ++newinbuf; + ++cnt; + } + + /* Remember how much we converted. */ + do_write += cnt; + *inlen -= cnt * sizeof (wchar_t); + + /* Check whether an illegal character appeared. */ + if (result != GCONV_OK) + break; + + if (data->is_last) + { + /* This is the last step. */ + result = (*inlen < sizeof (wchar_t) + ? GCONV_EMPTY_INPUT : GCONV_FULL_OUTPUT); + break; + } + + /* Status so far. */ + result = GCONV_EMPTY_INPUT; + + if (data->outbufavail > 0) + { + /* Call the functions below in the chain. */ + size_t newavail = data->outbufavail; + + result = (*fct) (next_step, next_data, data->outbuf, &newavail, + written, 0); + + /* Correct the output buffer. */ + if (newavail != data->outbufavail && newavail > 0) + { + memmove (data->outbuf, + &data->outbuf[data->outbufavail - newavail], + newavail); + data->outbufavail = newavail; + } + } + } + while (*inlen > 0 && result == GCONV_EMPTY_INPUT); + + __set_errno (save_errno); + } + + if (written != NULL && data->is_last) + *written = do_write; + + return result; +} + + int __gconv_transform_ucs4_utf8 (struct gconv_step *step, struct gconv_step_data *data, const char *inbuf, |