diff options
Diffstat (limited to 'iconvdata/8bit-generic.c')
| -rw-r--r-- | iconvdata/8bit-generic.c | 236 |
1 files changed, 53 insertions, 183 deletions
diff --git a/iconvdata/8bit-generic.c b/iconvdata/8bit-generic.c index 19194ad..2ea3331 100644 --- a/iconvdata/8bit-generic.c +++ b/iconvdata/8bit-generic.c @@ -18,186 +18,56 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <gconv.h> -#include <string.h> - -/* We use three objects to describe the operation mode. */ -static int from_8bit_object; -static int to_8bit_object; - - -int -gconv_init (struct gconv_step *step) -{ - /* Determine which direction. */ - if (strcasestr (step->from_name, NAME) != NULL) - step->data = &from_8bit_object; - else if (strcasestr (step->to_name, NAME) != NULL) - step->data = &to_8bit_object; - else - return GCONV_NOCONV; - - return GCONV_OK; -} - - -void -gconv_end (struct gconv_step *data) -{ - /* Nothing to do. */ -} - - -int -gconv (struct gconv_step *step, struct gconv_step_data *data, - const char *inbuf, size_t *inbufsize, 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) - { - 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 - { - do_write = 0; - - do - { - result = GCONV_OK; - - if (step->data == &from_8bit_object) - { - size_t inchars = *inbufsize; - size_t outwchars = data->outbufavail; - char *outbuf = data->outbuf; - size_t cnt = 0; - - while (cnt < inchars - && (outwchars + sizeof (wchar_t) <= data->outbufsize)) - { - wchar_t ch = to_ucs4[((unsigned char *) inbuf)[cnt]]; - - if (ch == L'\0' && inbuf[cnt] != '\0') - { - /* This is an illegal character. */ - result = GCONV_ILLEGAL_INPUT; - break; - } - - *((wchar_t *) (outbuf + outwchars)) = ch; - ++do_write; - outwchars += sizeof (wchar_t); - ++cnt; - } - *inbufsize -= cnt; - inbuf += cnt; - data->outbufavail = outwchars; - } - else - { - size_t inwchars = *inbufsize; - size_t outchars = data->outbufavail; - char *outbuf = data->outbuf; - size_t cnt = 0; - - while (inwchars >= cnt + sizeof (wchar_t) - && outchars < data->outbufsize) - { - int ch = *((wchar_t *) (inbuf + cnt)); - - if (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]) - || ch < 0 || (from_ucs4[ch] == '\0' && ch != 0)) - break; - - outbuf[outchars] = from_ucs4[ch]; - ++do_write; - ++outchars; - cnt += sizeof (wchar_t); - } - *inbufsize -= cnt; - inbuf += cnt; - data->outbufavail = outchars; - - if (outchars < data->outbufsize) - { - /* If there is still room in the output buffer something - is wrong with the input. */ - if (inwchars >= cnt + sizeof (wchar_t)) - { - /* An error occurred. */ - result = GCONV_ILLEGAL_INPUT; - break; - } - if (inwchars != cnt) - { - /* There are some unprocessed bytes at the end of the - input buffer. */ - result = GCONV_INCOMPLETE_INPUT; - break; - } - } - } - - if (result != GCONV_OK) - break; - - if (data->is_last) - { - /* This is the last step. */ - result = (*inbufsize > (step->data == &from_8bit_object - ? 0 : sizeof (wchar_t) - 1) - ? 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 (*inbufsize > 0 && result == GCONV_EMPTY_INPUT); - } - - if (written != NULL && data->is_last) - *written = do_write; - - return result; -} +#define FROM_LOOP from_generic +#define TO_LOOP to_generic +#define DEFINE_INIT 1 +#define DEFINE_FINI 1 +#define MIN_NEEDED_FROM 1 +#define MIN_NEEDED_TO 4 + + +/* First define the conversion function from the 8bit charset to UCS4. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_FROM +#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO +#define LOOPFCT FROM_LOOP +#define BODY \ + { \ + uint32_t ch = to_ucs4[*inptr]; \ + \ + if (HAS_HOLES && ch == L'\0' && *inptr != '\0') \ + { \ + /* This is an illegal character. */ \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + \ + *((uint32_t *) outptr)++ = ch; \ + ++inptr; \ + } +#include <iconv/loop.c> + + +/* Next, define the other direction. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_TO +#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM +#define LOOPFCT TO_LOOP +#define BODY \ + { \ + uint32_t ch = *((uint32_t *) inptr); \ + \ + if (ch >= sizeof (from_ucs4) / sizeof (from_ucs4[0]) \ + || (ch != 0 && from_ucs4[ch] == '\0')) \ + { \ + /* This is an illegal character. */ \ + result = GCONV_ILLEGAL_INPUT; \ + break; \ + } \ + \ + *outptr++ = from_ucs4[ch]; \ + inptr += 4; \ + } +#include <iconv/loop.c> + + +/* Now define the toplevel functions. */ +#include <iconv/skeleton.c> |