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(Fwrite_region): Add 7th optional arg

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CODING_SYSTEM.  Move gap after a newline code if we are encoding
in a coding system which requires designation sequences to be put
at beginning of line.  Set coding.last_block to 1 before calling
a_write for an empty file.
(build_annotations): Code tuned up for handling
pre_write_conversion of a coding system.
(e_write): Delete code for handling carryover of code conversion.
It is now handled in encode_coding.
(auto_save_1): Supply 7th new arg CODING_SYSTEM as Qnil to
Fwrite_region.
This commit is contained in:
Kenichi Handa 1997-05-10 03:37:01 +00:00
parent 477f8642b9
commit cdfb0f1d9b
1 changed files with 60 additions and 56 deletions
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116
src/fileio.c
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@ -3746,8 +3746,8 @@ build_annotations_unwind (buf)
return Qnil;
}
DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 6,
"r\nFWrite region to file: ",
DEFUN ("write-region", Fwrite_region, Swrite_region, 3, 7,
"r\nFWrite region to file: \ni\ni\ni\nZCoding system: ",
"Write current region into specified file.\n\
When called from a program, takes three arguments:\n\
START, END and FILENAME. START and END are buffer positions.\n\
@ -3763,13 +3763,17 @@ If VISIT is neither t nor nil nor a string,\n\
that means do not print the \"Wrote file\" message.\n\
The optional sixth arg LOCKNAME, if non-nil, specifies the name to\n\
use for locking and unlocking, overriding FILENAME and VISIT.\n\
The optional seventh arg CODING-SYSTEM, if non-nil, specifies the coding\n\
system to be used for encoding characters. For interactive use,\n\
you can specify it by giving a prefix argument. If no coding system\n\
is specified, the current region is encoded according to the value of\n\
`coding-system-for-write' or `coding-system-alist'. The variable\n\
`last-coding-system-used' is set the coding system actually used.\n\
Kludgy feature: if START is a string, then that string is written\n\
to the file, instead of any buffer contents, and END is ignored.\n\
This does code conversion according to the value of\n\
`coding-system-for-write' or `coding-system-alist', and sets the variable\n\
`last-coding-system-used' to the coding system actually used.")
(start, end, filename, append, visit, lockname)
to the file, instead of any buffer contents, and END is ignored.")
(start, end, filename, append, visit, lockname, coding_system_symbol)
Lisp_Object start, end, filename, append, visit, lockname;
Lisp_Object coding_system_symbol;
{
register int desc;
int failure;
@ -3800,7 +3804,42 @@ This does code conversion according to the value of\n\
if (!NILP (start) && !STRINGP (start))
validate_region (&start, &end);
GCPRO4 (start, filename, visit, lockname);
GCPRO5 (start, filename, visit, lockname, coding_system_symbol);
/* Decide the coding-system to be encoded to. */
{
Lisp_Object val;
if (auto_saving || NILP (current_buffer->enable_multibyte_characters))
val = Qnil;
else if (!NILP (coding_system_symbol))
val = coding_system_symbol;
else if (!NILP (Vcoding_system_for_write))
val = Vcoding_system_for_write;
else if (!NILP (Flocal_variable_if_set_p (Qbuffer_file_coding_system,
Qnil)))
val = Fsymbol_value (Qbuffer_file_coding_system);
else
{
Lisp_Object args[7], coding_systems;
args[0] = Qwrite_region, args[1] = start, args[2] = end,
args[3] = filename, args[4] = append, args[5] = visit,
args[6] = lockname;
coding_systems = Ffind_coding_system (7, args);
val = (CONSP (coding_systems)
? XCONS (coding_systems)->cdr
: Fsymbol_value (Qbuffer_file_coding_system));
}
setup_coding_system (Fcheck_coding_system (val), &coding);
if (!STRINGP (start) && !NILP (current_buffer->selective_display))
coding.selective = 1;
#ifdef DOS_NT
if (!NILP (current_buffer->buffer_file_type))
coding.eol_type = CODING_EOL_LF;
#endif /* DOS_NT */
}
filename = Fexpand_file_name (filename, Qnil);
if (STRINGP (visit))
visit_file = Fexpand_file_name (visit, Qnil);
@ -3841,38 +3880,6 @@ This does code conversion according to the value of\n\
return val;
}
/* Decide the coding-system to be encoded to. */
{
Lisp_Object val;
if (auto_saving || NILP (current_buffer->enable_multibyte_characters))
val = Qnil;
else if (!NILP (Vcoding_system_for_write))
val = Vcoding_system_for_write;
else if (!NILP (Flocal_variable_if_set_p (Qbuffer_file_coding_system,
Qnil)))
val = Fsymbol_value (Qbuffer_file_coding_system);
else
{
Lisp_Object args[7], coding_systems;
args[0] = Qwrite_region, args[1] = start, args[2] = end,
args[3] = filename, args[4] = append, args[5] = visit,
args[6] = lockname;
coding_systems = Ffind_coding_system (7, args);
val = (CONSP (coding_systems)
? XCONS (coding_systems)->cdr
: Fsymbol_value (Qbuffer_file_coding_system));
}
setup_coding_system (Fcheck_coding_system (val), &coding);
if (!STRINGP (start) && !NILP (current_buffer->selective_display))
coding.selective = 1;
#ifdef DOS_NT
if (!NILP (current_buffer->buffer_file_type))
coding.eol_type = CODING_EOL_LF;
#endif /* DOS_NT */
}
/* Special kludge to simplify auto-saving. */
if (NILP (start))
{
@ -4009,6 +4016,14 @@ This does code conversion according to the value of\n\
*/
if (GPT > BEG && GPT_ADDR[-1] != '\n')
move_gap (find_next_newline (GPT, 1));
#else
/* Whether VMS or not, we must move the gap to the next of newline
when we must put designation sequences at beginning of line. */
if (INTEGERP (start)
&& coding.type == coding_type_iso2022
&& coding.flags & CODING_FLAG_ISO_DESIGNATE_AT_BOL
&& GPT > BEG && GPT_ADDR[-1] != '\n')
move_gap (find_next_newline (GPT, 1));
#endif
failure = 0;
@ -4047,6 +4062,7 @@ This does code conversion according to the value of\n\
else
{
/* If file was empty, still need to write the annotations */
coding.last_block = 1;
failure = 0 > a_write (desc, "", 0, XINT (start), &annotations, &coding);
save_errno = errno;
}
@ -4227,14 +4243,10 @@ build_annotations (start, end, pre_write_conversion)
struct buffer *given_buffer = current_buffer;
Vwrite_region_annotations_so_far = annotations;
res = call2 (pre_write_conversion, start, end);
if (current_buffer != given_buffer)
{
start = BEGV;
end = ZV;
annotations = Qnil;
}
Flength (res);
annotations = merge (annotations, res, Qcar_less_than_car);
annotations = (current_buffer != given_buffer
? res
: merge (annotations, res, Qcar_less_than_car));
}
UNGCPRO;
@ -4309,14 +4321,6 @@ e_write (desc, addr, len, coding)
produced = encode_coding (coding, addr, buf, len, WRITE_BUF_SIZE,
&consumed);
len -= consumed, addr += consumed;
if (produced == 0 && len > 0)
{
/* There was a carry over because of invalid codes in the source.
We just write out them as is. */
bcopy (addr, buf, len);
produced = len;
len = 0;
}
if (produced > 0)
{
produced -= write (desc, buf, produced);
@ -4453,7 +4457,7 @@ auto_save_1 ()
return
Fwrite_region (Qnil, Qnil,
current_buffer->auto_save_file_name,
Qnil, Qlambda, Qnil);
Qnil, Qlambda, Qnil, Qnil);
}
static Lisp_Object