#define READ_BUF_SIZE (64 << 10)
#endif
-/* This function is called when a function bound to
- Vset_auto_coding_function causes some error. At that time, a text
- of a file has already been inserted in the current buffer, but,
- markers has not yet been adjusted. Thus we must adjust markers
- here. We are sure that the buffer was empty before the text of the
- file was inserted. */
-
-static Lisp_Object
-set_auto_coding_unwind (multibyte)
- Lisp_Object multibyte;
-{
- int inserted = Z_BYTE - BEG_BYTE;
-
- if (!NILP (multibyte))
- inserted = multibyte_chars_in_text (GPT_ADDR - inserted, inserted);
- adjust_after_insert (PT, PT_BYTE, Z, Z_BYTE, inserted);
-
- return Qnil;
-}
-
DEFUN ("insert-file-contents", Finsert_file_contents, Sinsert_file_contents,
1, 5, 0,
"Insert contents of file FILENAME after point.\n\
unsigned char buffer[1 << 14];
int replace_handled = 0;
int set_coding_system = 0;
- int coding_system_decided = 0;
if (current_buffer->base_buffer && ! NILP (visit))
error ("Cannot do file visiting in an indirect buffer");
}
}
- if (BEG < Z)
- {
- /* Decide the coding system to use for reading the file now
- because we can't use an optimized method for handling
- `coding:' tag if the current buffer is not empty. */
- Lisp_Object val;
- val = Qnil;
-
- if (!NILP (Vcoding_system_for_read))
- val = Vcoding_system_for_read;
- else if (! NILP (replace))
- /* In REPLACE mode, we can use the same coding system
- that was used to visit the file. */
- val = current_buffer->buffer_file_coding_system;
- else
- {
- /* Don't try looking inside a file for a coding system
- specification if it is not seekable. */
- if (! not_regular && ! NILP (Vset_auto_coding_function))
- {
- /* Find a coding system specified in the heading two
- lines or in the tailing several lines of the file.
- We assume that the 1K-byte and 3K-byte for heading
- and tailing respectively are sufficient fot this
- purpose. */
- int how_many, nread;
-
- if (st.st_size <= (1024 * 4))
+ /* Decide the coding-system of the file. */
+ {
+ Lisp_Object val;
+ val = Qnil;
+
+ if (!NILP (Vcoding_system_for_read))
+ val = Vcoding_system_for_read;
+ else if (! NILP (replace))
+ /* In REPLACE mode, we can use the same coding system
+ that was used to visit the file. */
+ val = current_buffer->buffer_file_coding_system;
+ else if (! not_regular)
+ {
+ /* Don't try looking inside a file for a coding system specification
+ if it is not seekable. */
+ if (! NILP (Vset_auto_coding_function))
+ {
+ /* Find a coding system specified in the heading two lines
+ or in the tailing several lines of the file. We assume
+ that the 1K-byte and 3K-byte for heading and tailing
+ respectively are sufficient fot this purpose. */
+ int nread;
+ int beginning_of_end, end_of_beginning;
+
+ if (st.st_size <= (1024 * 4))
+ {
nread = read (fd, read_buf, 1024 * 4);
- else
- {
- nread = read (fd, read_buf, 1024);
- if (nread >= 0)
- {
- if (lseek (fd, st.st_size - (1024 * 3), 0) < 0)
- report_file_error ("Setting file position",
- Fcons (orig_filename, Qnil));
- nread += read (fd, read_buf + nread, 1024 * 3);
- }
- }
+ end_of_beginning = nread;
+ beginning_of_end = 0;
+ }
+ else
+ {
+ nread = read (fd, read_buf, 1024);
+ end_of_beginning = nread;
+ beginning_of_end = nread;
+ if (nread >= 0)
+ {
+ if (lseek (fd, st.st_size - (1024 * 3), 0) < 0)
+ report_file_error ("Setting file position",
+ Fcons (orig_filename, Qnil));
+ nread += read (fd, read_buf + nread, 1024 * 3);
+ }
+ }
- if (nread < 0)
- error ("IO error reading %s: %s",
- XSTRING (orig_filename)->data, strerror (errno));
- else if (nread > 0)
- {
- int count = specpdl_ptr - specpdl;
- struct buffer *prev = current_buffer;
-
- record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
- temp_output_buffer_setup (" *code-converting-work*");
- set_buffer_internal (XBUFFER (Vstandard_output));
- current_buffer->enable_multibyte_characters = Qnil;
- insert_1_both (read_buf, nread, nread, 0, 0, 0);
- TEMP_SET_PT_BOTH (BEG, BEG_BYTE);
- val = call1 (Vset_auto_coding_function, make_number (nread));
- set_buffer_internal (prev);
- /* Discard the unwind protect for recovering the
- current buffer. */
- specpdl_ptr--;
-
- /* Rewind the file for the actual read done later. */
- if (lseek (fd, 0, 0) < 0)
- report_file_error ("Setting file position",
- Fcons (orig_filename, Qnil));
- }
- }
+ if (nread < 0)
+ error ("IO error reading %s: %s",
+ XSTRING (orig_filename)->data, strerror (errno));
+ else if (nread > 0)
+ {
+ int i;
+ int possible_spec = 0;
+ unsigned char *p, *p1;
+ Lisp_Object tem;
+ unsigned char *copy = (unsigned char *) alloca (nread + 1);
+
+ /* Make a copy of the contents of read_buf in COPY,
+ and convert it to lower case so we can compare
+ more efficiently. */
+ bcopy (read_buf, copy, nread);
+ for (i = 0; i < nread; i++)
+ copy[i] = DOWNCASE (copy[i]);
+ /* Ensure various comparisons fail at end of data. */
+ copy[nread] = 0;
+
+ /* Now test quickly whether the file contains a -*- line. */
+ p = copy;
+ while (*p != '\n' && p - copy < end_of_beginning)
+ p++;
+ if (copy[0] == '#' && copy[1] == '!')
+ while (*p != '\n' && p - copy < end_of_beginning)
+ p++;
+ p1 = copy;
+ while (p - p1 >= 3)
+ {
+ if (p1[0] == '-' && p1[1] == '*' && p1[2] == '-')
+ {
+ while (p - p1 >= 7)
+ {
+ if (! bcmp ("coding:", p1, 7))
+ {
+ possible_spec = 1;
+ goto win;
+ }
+ p1++;
+ }
+ break;
+ }
+ p1++;
+ }
- if (NILP (val))
- {
- /* If we have not yet decided a coding system, check
- file-coding-system-alist. */
- Lisp_Object args[6], coding_systems;
-
- args[0] = Qinsert_file_contents, args[1] = orig_filename;
- args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace;
- coding_systems = Ffind_operation_coding_system (6, args);
- if (CONSP (coding_systems))
- val = XCONS (coding_systems)->car;
- }
- }
+ /* Test quickly whether the file
+ contains a local variables list. */
+ p = ©[nread - 1];
+ p1 = ©[beginning_of_end];
+ while (p > p1)
+ {
+ if (p[0] == '\n' && p[1] == '\f')
+ break;
+ p--;
+ }
+ p1 = ©[nread];
+ while (p1 - p >= 16)
+ {
+ if (! bcmp ("local variables:", p, 16))
+ {
+ possible_spec = 1;
+ break;
+ }
+ p++;
+ }
+ win:
- setup_coding_system (Fcheck_coding_system (val), &coding);
+ if (possible_spec)
+ {
+ /* Always make this a unibyte string
+ because we have not yet decoded it. */
+ tem = make_unibyte_string (read_buf, nread);
+ val = call1 (Vset_auto_coding_function, tem);
+ }
- if (NILP (Vcoding_system_for_read)
- && NILP (current_buffer->enable_multibyte_characters))
- {
- /* We must suppress all text conversion except for end-of-line
- conversion. */
- int eol_type;
+ /* Rewind the file for the actual read done later. */
+ if (lseek (fd, 0, 0) < 0)
+ report_file_error ("Setting file position",
+ Fcons (orig_filename, Qnil));
+ }
+ }
+ if (NILP (val))
+ {
+ Lisp_Object args[6], coding_systems;
- eol_type = coding.eol_type;
- setup_coding_system (Qraw_text, &coding);
- coding.eol_type = eol_type;
- }
+ args[0] = Qinsert_file_contents, args[1] = orig_filename;
+ args[2] = visit, args[3] = beg, args[4] = end, args[5] = replace;
+ coding_systems = Ffind_operation_coding_system (6, args);
+ if (CONSP (coding_systems))
+ val = XCONS (coding_systems)->car;
+ }
+ }
- coding_system_decided = 1;
- }
+ if (NILP (Vcoding_system_for_read)
+ && NILP (current_buffer->enable_multibyte_characters))
+ {
+ /* We must suppress all text conversion except for end-of-line
+ conversion. */
+ struct coding_system coding_temp;
+
+ setup_coding_system (Fcheck_coding_system (val), &coding_temp);
+ setup_coding_system (Qraw_text, &coding);
+ coding.eol_type = coding_temp.eol_type;
+ }
+ else
+ setup_coding_system (Fcheck_coding_system (val), &coding);
- /* Ensure we always set Vlast_coding_system_used. */
- set_coding_system = 1;
+ /* Ensure we always set Vlast_coding_system_used. */
+ set_coding_system = 1;
+ }
/* If requested, replace the accessible part of the buffer
with the file contents. Avoid replacing text at the
But if we discover the need for conversion, we give up on this method
and let the following if-statement handle the replace job. */
if (!NILP (replace)
- && BEGV < ZV
&& ! CODING_REQUIRE_DECODING (&coding)
&& (coding.eol_type == CODING_EOL_UNDECIDED
|| coding.eol_type == CODING_EOL_LF))
is needed, in a simple way that needs a lot of memory.
The preceding if-statement handles the case of no conversion
in a more optimized way. */
- if (!NILP (replace) && ! replace_handled && BEGV < ZV)
+ if (!NILP (replace) && ! replace_handled)
{
int same_at_start = BEGV_BYTE;
int same_at_end = ZV_BYTE;
if (inserted > 0)
{
- if (! coding_system_decided)
- {
- /* The coding system is not yet decided. Decide it by an
- optimized method for handling `coding:' tag. */
- Lisp_Object val;
- val = Qnil;
-
- if (!NILP (Vcoding_system_for_read))
- val = Vcoding_system_for_read;
- else
- {
- if (! NILP (Vset_auto_coding_function))
- {
- /* Since we are sure that the current buffer was
- empty before the insertion, we can toggle
- enable-multibyte-characters directly here without
- taking care of marker adjustment and byte
- combining problem. */
- Lisp_Object prev_multibyte;
- int count = specpdl_ptr - specpdl;
-
- prev_multibyte = current_buffer->enable_multibyte_characters;
- current_buffer->enable_multibyte_characters = Qnil;
- record_unwind_protect (set_auto_coding_unwind,
- prev_multibyte);
- val = call1 (Vset_auto_coding_function,
- make_number (inserted));
- /* Discard the unwind protect for recovering the
- error of Vset_auto_coding_function. */
- specpdl_ptr--;
- current_buffer->enable_multibyte_characters = prev_multibyte;
- TEMP_SET_PT_BOTH (BEG, BEG_BYTE);
- }
-
- if (NILP (val))
- {
- /* If the coding system is not yet decided, check
- file-coding-system-alist. */
- Lisp_Object args[6], coding_systems;
-
- args[0] = Qinsert_file_contents, args[1] = orig_filename;
- args[2] = visit, args[3] = beg, args[4] = end, args[5] = Qnil;
- coding_systems = Ffind_operation_coding_system (6, args);
- if (CONSP (coding_systems))
- val = XCONS (coding_systems)->car;
- }
- }
-
- setup_coding_system (Fcheck_coding_system (val), &coding);
-
- if (NILP (Vcoding_system_for_read)
- && NILP (current_buffer->enable_multibyte_characters))
- {
- /* We must suppress all text conversion except for
- end-of-line conversion. */
- int eol_type;
-
- eol_type = coding.eol_type;
- setup_coding_system (Qraw_text, &coding);
- coding.eol_type = eol_type;
- }
- }
-
if (CODING_MAY_REQUIRE_DECODING (&coding))
{
/* Here, we don't have to consider byte combining (see the
projects / emacs.git / commitdiff