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- /* GNU Emacs case conversion functions.
- Copyright (C) 1985, 1990 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include "config.h"
- #include "lisp.h"
- #include "buffer.h"
- #include "commands.h"
- #include "syntax.h"
-
- enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
-
- Lisp_Object
- casify_object (flag, obj)
- enum case_action flag;
- Lisp_Object obj;
- {
- register int i, c, len;
- register int inword = flag == CASE_DOWN;
-
- while (1)
- {
- if (XTYPE (obj) == Lisp_Int)
- {
- c = XINT (obj);
- if (c >= 0 && c <= 0400)
- {
- if (inword)
- XFASTINT (obj) = DOWNCASE (c);
- else if (!UPPERCASEP (c))
- XFASTINT (obj) = UPCASE1 (c);
- }
- return obj;
- }
- if (XTYPE (obj) == Lisp_String)
- {
- obj = Fcopy_sequence (obj);
- len = XSTRING (obj)->size;
- for (i = 0; i < len; i++)
- {
- c = XSTRING (obj)->data[i];
- if (inword)
- c = DOWNCASE (c);
- else if (!UPPERCASEP (c))
- c = UPCASE1 (c);
- XSTRING (obj)->data[i] = c;
- if (flag == CASE_CAPITALIZE)
- inword = SYNTAX (c) == Sword;
- }
- return obj;
- }
- obj = wrong_type_argument (Qchar_or_string_p, obj, 0);
- }
- }
-
- DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0,
- "One arg, a character or string. Convert it to upper case and return that.")
- (obj)
- Lisp_Object obj;
- {
- return casify_object (CASE_UP, obj);
- }
-
- DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0,
- "One arg, a character or string. Convert it to lower case and return that.")
- (obj)
- Lisp_Object obj;
- {
- return casify_object (CASE_DOWN, obj);
- }
-
- DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0,
- "One arg, a character or string. Convert it to capitalized form and return that.\n\
- This means that each word's first character is upper case and the rest is lower case.")
- (obj)
- Lisp_Object obj;
- {
- return casify_object (CASE_CAPITALIZE, obj);
- }
-
- /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
- b and e specify range of buffer to operate on. */
-
- casify_region (flag, b, e)
- enum case_action flag;
- Lisp_Object b, e;
- {
- register int i;
- register int c;
- register int inword = flag == CASE_DOWN;
-
- validate_region (&b, &e);
- prepare_to_modify_buffer ();
- record_change (XFASTINT (b), XFASTINT (e) - XFASTINT (b));
-
- for (i = XFASTINT (b); i < XFASTINT (e); i++)
- {
- c = FETCH_CHAR (i);
- 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;
- if ((int) flag >= (int) CASE_CAPITALIZE)
- inword = SYNTAX (c) == Sword;
- }
-
- modify_region (XFASTINT (b), XFASTINT (e));
- }
-
- DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r",
- "Convert the region to upper case. In programs, wants two arguments.\n\
- These arguments specify the starting and ending character numbers of\n\
- the region to operate on. When used as a command, the text between\n\
- point and the mark is operated on.")
- (b, e)
- Lisp_Object b, e;
- {
- casify_region (CASE_UP, b, e);
- return Qnil;
- }
-
- DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r",
- "Convert the region to lower case. In programs, wants two arguments.\n\
- These arguments specify the starting and ending character numbers of\n\
- the region to operate on. When used as a command, the text between\n\
- point and the mark is operated on.")
- (b, e)
- Lisp_Object b, e;
- {
- casify_region (CASE_DOWN, b, e);
- return Qnil;
- }
-
- DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r",
- "Convert the region to upper case. In programs, wants two arguments.\n\
- These arguments specify the starting and ending character numbers of\n\
- the region to operate on. When used as a command, the text between\n\
- point and the mark is operated on.\n\
- Capitalized form means each word's first character is upper case\n\
- and the rest of it is lower case.")
- (b, e)
- Lisp_Object b, e;
- {
- casify_region (CASE_CAPITALIZE, b, e);
- return Qnil;
- }
-
- /* Like Fcapitalize but change only the initials. */
-
- Lisp_Object
- upcase_initials_region (b, e)
- Lisp_Object b, e;
- {
- casify_region (CASE_CAPITALIZE_UP, b, e);
- return Qnil;
- }
-
- Lisp_Object
- operate_on_word (arg)
- Lisp_Object arg;
- {
- Lisp_Object end, val;
- int farend;
-
- CHECK_NUMBER (arg, 0);
- farend = scan_words (point, XINT (arg));
- if (!farend)
- farend = XINT (arg) > 0 ? ZV : BEGV;
- end = point > farend ? point : farend;
- SET_PT (end);
- XFASTINT (val) = farend;
- return val;
- }
-
- DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p",
- "Convert following word (or ARG words) to upper case, moving over.\n\
- With negative argument, convert previous words but do not move.")
- (arg)
- Lisp_Object arg;
- {
- Lisp_Object opoint;
- XFASTINT (opoint) = point;
- casify_region (CASE_UP, opoint, operate_on_word (arg));
- return Qnil;
- }
-
- DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p",
- "Convert following word (or ARG words) to lower case, moving over.\n\
- With negative argument, convert previous words but do not move.")
- (arg)
- Lisp_Object arg;
- {
- Lisp_Object opoint;
- XFASTINT (opoint) = point;
- casify_region (CASE_DOWN, opoint, operate_on_word (arg));
- return Qnil;
- }
-
- DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p",
- "Capitalize the following word (or ARG words), moving over.\n\
- This gives the word(s) a first character in upper case\n\
- and the rest lower case.\n\
- With negative argument, capitalize previous words but do not move.")
- (arg)
- Lisp_Object arg;
- {
- Lisp_Object opoint;
- XFASTINT (opoint) = point;
- casify_region (CASE_CAPITALIZE, opoint, operate_on_word (arg));
- return Qnil;
- }
-
- syms_of_casefiddle ()
- {
- defsubr (&Supcase);
- defsubr (&Sdowncase);
- defsubr (&Scapitalize);
- defsubr (&Supcase_region);
- defsubr (&Sdowncase_region);
- defsubr (&Scapitalize_region);
- defsubr (&Supcase_word);
- defsubr (&Sdowncase_word);
- defsubr (&Scapitalize_word);
- }
-
- keys_of_casefiddle ()
- {
- ndefkey (Vctl_x_map, Ctl('U'), "upcase-region");
- ndefkey (Vctl_x_map, Ctl('L'), "downcase-region");
- ndefkey (Vesc_map, 'u', "upcase-word");
- ndefkey (Vesc_map, 'l', "downcase-word");
- ndefkey (Vesc_map, 'c', "capitalize-word");
- }
-