diff options
Diffstat (limited to 'iconvdata/iso-2022-jp-3.c')
| -rw-r--r-- | iconvdata/iso-2022-jp-3.c | 67 |
1 files changed, 48 insertions, 19 deletions
diff --git a/iconvdata/iso-2022-jp-3.c b/iconvdata/iso-2022-jp-3.c index de259580c3..047fab8e8d 100644 --- a/iconvdata/iso-2022-jp-3.c +++ b/iconvdata/iso-2022-jp-3.c @@ -67,23 +67,34 @@ enum CURRENT_SEL_MASK = 7 << 3 }; -/* During UCS-4 to ISO-2022-JP-3 conversion, the COUNT element of the state - also contains the last two bytes to be output, shifted by 6 bits, and a - one-bit indicator whether they must be preceded by the shift sequence, - in bit 22. */ +/* During UCS-4 to ISO-2022-JP-3 conversion, the COUNT element of the + state also contains the last two bytes to be output, shifted by 6 + bits, and a one-bit indicator whether they must be preceded by the + shift sequence, in bit 22. During ISO-2022-JP-3 to UCS-4 + conversion, COUNT may also contain a non-zero pending wide + character, shifted by six bits. This happens for certain inputs in + JISX0213_1_2004_set and JISX0213_2_set if the second wide character + in a combining sequence cannot be written because the buffer is + full. */ /* Since this is a stateful encoding we have to provide code which resets the output state to the initial state. This has to be done during the flushing. */ #define EMIT_SHIFT_TO_INIT \ - if ((data->__statep->__count & ~7) != ASCII_set) \ + if (data->__statep->__count != ASCII_set) \ { \ if (FROM_DIRECTION) \ { \ - /* It's easy, we don't have to emit anything, we just reset the \ - state for the input. */ \ - data->__statep->__count &= 7; \ - data->__statep->__count |= ASCII_set; \ + if (__glibc_likely (outbuf + 4 <= outend)) \ + { \ + /* Write out the last character. */ \ + *((uint32_t *) outbuf) = data->__statep->__count >> 6; \ + outbuf += sizeof (uint32_t); \ + data->__statep->__count = ASCII_set; \ + } \ + else \ + /* We don't have enough room in the output buffer. */ \ + status = __GCONV_FULL_OUTPUT; \ } \ else \ { \ @@ -151,7 +162,21 @@ enum #define LOOPFCT FROM_LOOP #define BODY \ { \ - uint32_t ch = *inptr; \ + uint32_t ch; \ + \ + /* Output any pending character. */ \ + ch = set >> 6; \ + if (__glibc_unlikely (ch != 0)) \ + { \ + put32 (outptr, ch); \ + outptr += 4; \ + /* Remove the pending character, but preserve state bits. */ \ + set &= (1 << 6) - 1; \ + continue; \ + } \ + \ + /* Otherwise read the next input byte. */ \ + ch = *inptr; \ \ /* Recognize escape sequences. */ \ if (__glibc_unlikely (ch == ESC)) \ @@ -297,21 +322,25 @@ enum uint32_t u1 = __jisx0213_to_ucs_combining[ch - 1][0]; \ uint32_t u2 = __jisx0213_to_ucs_combining[ch - 1][1]; \ \ + inptr += 2; \ + \ + put32 (outptr, u1); \ + outptr += 4; \ + \ /* See whether we have room for two characters. */ \ - if (outptr + 8 <= outend) \ + if (outptr + 4 <= outend) \ { \ - inptr += 2; \ - put32 (outptr, u1); \ - outptr += 4; \ put32 (outptr, u2); \ outptr += 4; \ continue; \ } \ - else \ - { \ - result = __GCONV_FULL_OUTPUT; \ - break; \ - } \ + \ + /* Otherwise store only the first character now, and \ + put the second one into the queue. */ \ + set |= u2 << 6; \ + /* Tell the caller why we terminate the loop. */ \ + result = __GCONV_FULL_OUTPUT; \ + break; \ } \ \ inptr += 2; \ |