diff options
Diffstat (limited to 'iconv/gconv_simple.c')
| -rw-r--r-- | iconv/gconv_simple.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c index 6f399ccd1a..280ecf57b5 100644 --- a/iconv/gconv_simple.c +++ b/iconv/gconv_simple.c @@ -20,6 +20,7 @@ #include <errno.h> #include <gconv.h> +#include <stdint.h> #include <stdlib.h> #include <string.h> #include <wchar.h> @@ -289,3 +290,253 @@ __gconv_transform_utf8_ucs4 (struct gconv_step *step, return result; } + + +int +__gconv_transform_ucs2_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->data, '\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); + } + } + else + { + int save_errno = errno; + do_write = 0; + + do + { + const uint16_t *newinbuf = (const uint16_t *) inbuf; + wchar_t *outbuf = (wchar_t *) &data->outbuf[data->outbufavail]; + size_t actually = 0; + + errno = 0; + + while (data->outbufavail + 4 <= data->outbufsize + && *inlen >= 2) + { + outbuf[actually++] = *newinbuf++; + data->outbufavail += 4; + *inlen -= 2; + } + + if (*inlen != 1) + { + /* We have an incomplete input character. */ + mbstate_t *state = (mbstate_t *) data->data; + state->count = 1; + state->value = *(uint8_t *) newinbuf; + --*inlen; + } + + /* Remember how much we converted. */ + do_write += actually * sizeof (wchar_t); + + /* Check whether an illegal character appeared. */ + if (errno != 0) + { + result = GCONV_ILLEGAL_INPUT; + break; + } + + if (*inlen == 0 && !mbsinit ((mbstate_t *) data->data)) + { + /* We have an incomplete character at the end. */ + result = GCONV_INCOMPLETE_INPUT; + break; + } + + if (data->is_last) + { + /* This is the last step. */ + result = (data->outbufavail + sizeof (wchar_t) > data->outbufsize + ? GCONV_FULL_OUTPUT : GCONV_EMPTY_INPUT); + 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_ucs2 (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->data, '\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; + + do + { + const wchar_t *newinbuf = (const wchar_t *) inbuf; + uint16_t *outbuf = (uint16_t *) &data->outbuf[data->outbufavail]; + size_t actually = 0; + + errno = 0; + + while (data->outbufavail + 2 <= data->outbufsize + && *inlen >= 4) + { + if (*newinbuf >= 0x10000) + { + __set_errno (EILSEQ); + break; + } + outbuf[actually++] = (wchar_t) *newinbuf; + *inlen -= 4; + data->outbufavail += 2; + } + + if (*inlen < 4) + { + /* We have an incomplete input character. */ + mbstate_t *state = (mbstate_t *) data->data; + state->count = *inlen; + state->value = 0; + while (*inlen > 0) + { + state->value <<= 8; + state->value += *(uint8_t *) newinbuf; + --*inlen; + } + } + + /* Remember how much we converted. */ + do_write += (const char *) newinbuf - inbuf; + + /* Check whether an illegal character appeared. */ + if (errno != 0) + { + result = GCONV_ILLEGAL_INPUT; + break; + } + + if (*inlen == 0 && !mbsinit ((mbstate_t *) data->data)) + { + /* We have an incomplete character at the end. */ + result = GCONV_INCOMPLETE_INPUT; + 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; +} |