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(setup_coding_system): Initialize

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coding->spec.ccl.eight_bit_carryover.
(ccl_coding_driver): Pay attention to carried over 8-bit bytes.
This commit is contained in:
Kenichi Handa 2000-12-28 07:03:56 +00:00
parent 898f33125f
commit 1c3478b085
1 changed files with 56 additions and 2 deletions
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58
src/coding.c
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@ -3710,6 +3710,7 @@ setup_coding_system (coding_system, coding)
}
coding->common_flags |= CODING_REQUIRE_FLUSHING_MASK;
coding->spec.ccl.cr_carryover = 0;
coding->spec.ccl.eight_bit_carryover[0] = 0;
break;
case 5:
@ -4422,6 +4423,7 @@ ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep)
struct ccl_program *ccl
= encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder;
int result;
unsigned char *dst = destination;
ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK;
if (encodep)
@ -4434,8 +4436,21 @@ ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep)
ccl->cr_consumed = coding->spec.ccl.cr_carryover;
}
ccl->multibyte = coding->src_multibyte;
coding->produced = ccl_driver (ccl, source, destination,
src_bytes, dst_bytes, &(coding->consumed));
if (coding->spec.ccl.eight_bit_carryover[0] != 0)
{
/* Move carryover bytes to DESTINATION. */
unsigned char *p = coding->spec.ccl.eight_bit_carryover;
while (*p)
*dst++ = *p++;
coding->spec.ccl.eight_bit_carryover[0] = 0;
if (dst_bytes)
dst_bytes -= dst - destination;
}
coding->produced = (ccl_driver (ccl, source, dst, src_bytes, dst_bytes,
&(coding->consumed))
+ dst - destination);
if (encodep)
{
coding->produced_char = coding->produced;
@ -4443,8 +4458,47 @@ ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep)
}
else
{
/* On decoding, the destination should always multibyte. But,
CCL program might have been generated an invalid multibyte
sequence. Here we make such a sequence valid as
multibyte. */
int bytes
= dst_bytes ? dst_bytes : source + coding->consumed - destination;
if ((coding->consumed < src_bytes
|| !ccl->last_block)
&& coding->produced >= 1
&& destination[coding->produced - 1] >= 0x80)
{
/* We should not convert the tailing 8-bit codes to
multibyte form even if they doesn't form a valid
multibyte sequence. They may form a valid sequence in
the next call. */
int carryover = 0;
if (destination[coding->produced - 1] < 0xA0)
carryover = 1;
else if (coding->produced >= 2)
{
if (destination[coding->produced - 2] >= 0x80)
{
if (destination[coding->produced - 2] < 0xA0)
carryover = 2;
else if (coding->produced >= 3
&& destination[coding->produced - 3] >= 0x80
&& destination[coding->produced - 3] < 0xA0)
carryover = 3;
}
}
if (carryover > 0)
{
BCOPY_SHORT (destination + coding->produced - carryover,
coding->spec.ccl.eight_bit_carryover,
carryover);
coding->spec.ccl.eight_bit_carryover[carryover] = 0;
coding->produced -= carryover;
}
}
coding->produced = str_as_multibyte (destination, bytes,
coding->produced,
&(coding->produced_char));