/* GNU Emacs case conversion functions.
- Copyright (C) 1985, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1994, 1997 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include <config.h>
#include "lisp.h"
#include "buffer.h"
+#include "charset.h"
#include "commands.h"
#include "syntax.h"
enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
+
+Lisp_Object Qidentity;
\f
Lisp_Object
casify_object (flag, obj)
{
register int i, c, len;
register int inword = flag == CASE_DOWN;
+ Lisp_Object tem;
/* If the case table is flagged as modified, rescan it. */
if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1]))
{
if (INTEGERP (obj))
{
- c = XINT (obj);
- if (c >= 0 && c <= 0400)
+ c = DOWNCASE (XFASTINT (obj));
+ if (inword)
+ XSETFASTINT (obj, c);
+ else if (c == XFASTINT (obj))
{
- if (inword)
- XSETFASTINT (obj, DOWNCASE (c));
- else if (!UPPERCASEP (c))
- XSETFASTINT (obj, UPCASE1 (c));
+ c = UPCASE1 (XFASTINT (obj));
+ XSETFASTINT (obj, c);
}
return obj;
}
+
if (STRINGP (obj))
{
+ int multibyte = STRING_MULTIBYTE (obj);
+
obj = Fcopy_sequence (obj);
- len = XSTRING (obj)->size;
- for (i = 0; i < len; i++)
+ len = XSTRING (obj)->size_byte;
+
+ /* Scan all single-byte characters from start of string. */
+ for (i = 0; i < len;)
{
c = XSTRING (obj)->data[i];
+
+ if (multibyte && c >= 0x80)
+ /* A multibyte character can't be handled in this
+ simple loop. */
+ break;
if (inword && flag != CASE_CAPITALIZE_UP)
c = DOWNCASE (c);
else if (!UPPERCASEP (c)
&& (!inword || flag != CASE_CAPITALIZE_UP))
c = UPCASE1 (c);
+ /* If this char won't fit in a single-byte string.
+ fall out to the multibyte case. */
+ if (multibyte ? ! ASCII_BYTE_P (c)
+ : ! SINGLE_BYTE_CHAR_P (c))
+ break;
+
XSTRING (obj)->data[i] = c;
if ((int) flag >= (int) CASE_CAPITALIZE)
inword = SYNTAX (c) == Sword;
+ i++;
+ }
+
+ /* If we didn't do the whole string as single-byte,
+ scan the rest in a more complex way. */
+ if (i < len)
+ {
+ /* The work is not yet finished because of a multibyte
+ character just encountered. */
+ int fromlen, tolen, j = i, j_byte = i;
+ char *buf
+ = (char *) alloca ((len - i) * MAX_LENGTH_OF_MULTI_BYTE_FORM
+ + i);
+ unsigned char *str, workbuf[4];
+
+ /* Copy data already handled. */
+ bcopy (XSTRING (obj)->data, buf, i);
+
+ /* From now on, I counts bytes. */
+ while (i < len)
+ {
+ c = STRING_CHAR_AND_LENGTH (XSTRING (obj)->data + i,
+ len - i, fromlen);
+ if (inword && flag != CASE_CAPITALIZE_UP)
+ c = DOWNCASE (c);
+ else if (!UPPERCASEP (c)
+ && (!inword || flag != CASE_CAPITALIZE_UP))
+ c = UPCASE1 (c);
+ tolen = CHAR_STRING (c, workbuf, str);
+ bcopy (str, buf + j_byte, tolen);
+ i += fromlen;
+ j++;
+ j_byte += tolen;
+ if ((int) flag >= (int) CASE_CAPITALIZE)
+ inword = SYNTAX (c) == Sword;
+ }
+ obj = make_multibyte_string (buf, j, j_byte);
}
return obj;
}
register int i;
register int c;
register int inword = flag == CASE_DOWN;
+ register int multibyte = !NILP (current_buffer->enable_multibyte_characters);
int start, end;
+ int start_byte, end_byte;
+ Lisp_Object ch, downch, val;
if (EQ (b, e))
/* Not modifying because nothing marked */
end = XFASTINT (e);
modify_region (current_buffer, start, end);
record_change (start, end - start);
+ start_byte = CHAR_TO_BYTE (start);
+ end_byte = CHAR_TO_BYTE (end);
- for (i = start; i < end; i++)
+ for (i = start_byte; i < end_byte; i++)
{
- c = FETCH_CHAR (i);
+ c = FETCH_BYTE (i);
+ if (multibyte && c >= 0x80)
+ /* A multibyte character can't be handled in this simple loop. */
+ break;
if (inword && flag != CASE_CAPITALIZE_UP)
c = DOWNCASE (c);
else if (!UPPERCASEP (c)
&& (!inword || flag != CASE_CAPITALIZE_UP))
c = UPCASE1 (c);
- FETCH_CHAR (i) = c;
+ FETCH_BYTE (i) = c;
if ((int) flag >= (int) CASE_CAPITALIZE)
inword = SYNTAX (c) == Sword;
}
+ if (i < end_byte)
+ {
+ /* The work is not yet finished because of a multibyte character
+ just encountered. */
+ int opoint = PT;
+ int opoint_byte = PT_BYTE;
+ int c2;
+
+ while (i < end_byte)
+ {
+ if ((c = FETCH_BYTE (i)) >= 0x80)
+ c = FETCH_MULTIBYTE_CHAR (i);
+ c2 = c;
+ if (inword && flag != CASE_CAPITALIZE_UP)
+ c2 = DOWNCASE (c);
+ else if (!UPPERCASEP (c)
+ && (!inword || flag != CASE_CAPITALIZE_UP))
+ c2 = UPCASE1 (c);
+ if (c != c2)
+ {
+ int fromlen, tolen, j;
+ unsigned char workbuf[4], *str;
+
+ /* Handle the most likely case */
+ if (c < 0400 && c2 < 0400)
+ FETCH_BYTE (i) = c2;
+ else if (fromlen = CHAR_STRING (c, workbuf, str),
+ tolen = CHAR_STRING (c2, workbuf, str),
+ fromlen == tolen)
+ {
+ for (j = 0; j < tolen; ++j)
+ FETCH_BYTE (i + j) = str[j];
+ }
+ else
+ {
+ error ("Can't casify letters that change length");
+#if 0 /* This is approximately what we'd like to be able to do here */
+ if (tolen < fromlen)
+ del_range_1 (i + tolen, i + fromlen, 0);
+ else if (tolen > fromlen)
+ {
+ TEMP_SET_PT (i + fromlen);
+ insert_1 (str + fromlen, tolen - fromlen, 1, 0, 0);
+ }
+#endif
+ }
+ }
+ if ((int) flag >= (int) CASE_CAPITALIZE)
+ inword = SYNTAX (c2) == Sword;
+ INC_POS (i);
+ }
+ TEMP_SET_PT_BOTH (opoint, opoint_byte);
+ }
signal_after_change (start, end - start, end - start);
}
\f
syms_of_casefiddle ()
{
+ Qidentity = intern ("identity");
+ staticpro (&Qidentity);
defsubr (&Supcase);
defsubr (&Sdowncase);
defsubr (&Scapitalize);
HCoop / bpt / emacs.git / blobdiff