diff options
Diffstat (limited to 'transcode.c')
| -rw-r--r-- | transcode.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/transcode.c b/transcode.c index c1323e3ac7..dd57f0809d 100644 --- a/transcode.c +++ b/transcode.c @@ -368,6 +368,8 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, unsigned char *out_p; int readlen; const BYTE_LOOKUP *next_table; + VALUE next_info; + unsigned char next_byte; unsigned char empty_buf; unsigned char *empty_ptr = &empty_buf; @@ -386,6 +388,8 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, out_p = *out_pos; readlen = my_transcoding->readlen; next_table = my_transcoding->next_table; + next_info = my_transcoding->next_info; + next_byte = my_transcoding->next_byte; #define SUSPEND(ret, num) \ do { \ @@ -399,6 +403,8 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, *out_pos = out_p; \ my_transcoding->readlen = readlen; \ my_transcoding->next_table = next_table; \ + my_transcoding->next_info = next_info; \ + my_transcoding->next_byte = next_byte; \ return ret; \ resume_label ## num:; \ } while (0) @@ -422,9 +428,6 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, } while (1) { - unsigned char next_byte; - VALUE next_info; - if (in_stop <= in_p) { if (!(opt & PARTIAL_INPUT)) break; @@ -460,7 +463,6 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, readlen++; next_table = (const BYTE_LOOKUP *)next_info; goto follow_byte; - /* maybe rewrite the following cases to use fallthrough???? */ case ZERObt: /* drop input */ continue; case ONEbt: @@ -509,21 +511,32 @@ transcode_restartable(const unsigned char **in_pos, unsigned char **out_pos, } case INVALID: { + int step; if (readlen <= unitlen) { while ((opt & PARTIAL_INPUT) && readlen + (in_stop - in_p) < unitlen) { - readlen += in_stop - in_p; + step = in_stop - in_p; + readlen += step; in_p = in_stop; SUSPEND(transcode_ibuf_empty, 8); } - if (readlen + (in_stop - in_p) <= unitlen) + if (readlen + (in_stop - in_p) <= unitlen) { + step = in_stop - in_p; + readlen += step; in_p = in_stop; - else - in_p += unitlen - readlen; + } + else { + step = unitlen - readlen; + readlen = unitlen; + in_p += step; + } } else { - /* xxx: possibly in_p is lesser than *in_pos + /* xxx: step may be negative. + * possibly in_p is lesser than *in_pos. * caller may want to access readbuf. */ - in_p += ((readlen - 1) / unitlen) * unitlen - readlen; + step = ((readlen - 1) / unitlen) * unitlen - readlen; + in_p += step; + readlen += step; } goto invalid; } |