bug#71525: 30.0.50; Spin in delete-region/interval_deletion_adjustment Spin in delete-region/interval_deletion_adjustment)

[Dmitry Gutov <dmitry@gutov.dev>]

On 14/06/2024 10:13, Eli Zaretskii wrote:
> This is the correct approach, IMO.  But see some minor comments below.
> 
>> @@ -7814,7 +7815,7 @@ encode_coding (struct coding_system *coding)
>>     } while (coding->consumed_char < coding->src_chars);
>>   
>>     if (BUFFERP (coding->dst_object) && coding->produced_char > 0)
>> -    insert_from_gap (coding->produced_char, coding->produced, 0);
>> +    insert_from_gap (coding->produced_char, coding->produced, 0, coding->dst_before_markers);
> Here (and elsewhere in the patch) too-long lines should be broken in
> two.
> 
>> +  /* True to insert before markers in the DST_OBJECT buffer.  */
>> +  bool_bf dst_before_markers : 1;
> I'd call this 'insert_before_markers' instead.  Please also add a
> detailed comment here explaining what this flag is for and where and
> why used.
> 
>>   /* Insert a sequence of NCHARS chars which occupy NBYTES bytes
>>      starting at GAP_END_ADDR - NBYTES (if text_at_gap_tail) and at
>> -   GPT_ADDR (if not text_at_gap_tail).  */
>> +   GPT_ADDR (if not text_at_gap_tail).
>> +
>> +  If BEFORE_MARKERS is true, insert before markers. */
> This commentary should also mention process.c as the single caller
> using this facility in unconventional ways.
> 
>>   extern void insert_from_gap_1 (ptrdiff_t, ptrdiff_t, bool text_at_gap_tail);
>> -extern void insert_from_gap (ptrdiff_t, ptrdiff_t, bool text_at_gap_tail);
>> +extern void insert_from_gap (ptrdiff_t, ptrdiff_t, bool text_at_gap_tail,
>> +			     bool before_markers);
> We don't have names of arguments in prototypes, only their types.
> (Yes, it means the original prototype, and the ones around it, were
> also wrong.)
> 
>> --- a/src/process.c
>> +++ b/src/process.c
>> @@ -6415,6 +6415,7 @@ read_and_insert_process_output (struct Lisp_Process *p, char *buf,
>>         specpdl_ref count1 = SPECPDL_INDEX ();
>>   
>>         XSETBUFFER (curbuf, current_buffer);
>> +      process_coding->dst_before_markers = true;
> Please also add a comment here explaining why this is done.

Thanks! I've pushed the amended patch to master, please see how you like 
the result.