--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/casefiddle.c	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,336 @@
+/* XEmacs case conversion functions.
+   Copyright (C) 1985, 1992, 1993, 1994 Free Software Foundation, Inc.
+
+This file is part of XEmacs.
+
+XEmacs 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 2, or (at your option) any
+later version.
+
+XEmacs 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 XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: FSF 19.30. */
+
+#include <config.h>
+#include "lisp.h"
+
+#include "buffer.h"
+#include "commands.h"
+#include "insdel.h"
+#include "syntax.h"
+
+enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP};
+
+static Lisp_Object
+casify_object (struct buffer *buf, enum case_action flag, Lisp_Object obj)
+{
+  REGISTER Emchar c;
+  REGISTER Charcount i, len;
+  REGISTER int inword = flag == CASE_DOWN;
+  Lisp_Object syntax_table = buf->syntax_table;
+
+  while (1)
+    {
+      if (CHAR_OR_CHAR_INTP (obj))
+	{
+	  CHECK_CHAR_COERCE_INT (obj);
+	  c = XCHAR (obj);
+	  if (IN_TRT_TABLE_DOMAIN (c))
+	    {
+	      if (inword)
+		obj = make_char (DOWNCASE (buf, c));
+	      else if (!UPPERCASEP (buf, c))
+		obj = make_char (UPCASE1 (buf, c));
+	    }
+	  return obj;
+	}
+      if (STRINGP (obj))
+	{
+	  obj = Fcopy_sequence (obj);
+	  len = string_char_length (XSTRING (obj));
+	  for (i = 0; i < len; i++)
+	    {
+	      c = string_char (XSTRING (obj), i);
+	      if (inword)
+		c = DOWNCASE (buf, c);
+	      else if (!UPPERCASEP (buf, c)
+		       && (!inword || flag != CASE_CAPITALIZE_UP))
+		c = UPCASE1 (buf, c);
+	      set_string_char (XSTRING (obj), i, c);
+	      if ((int) flag >= (int) CASE_CAPITALIZE)
+		inword = WORD_SYNTAX_P (syntax_table, c);
+	    }
+	  return obj;
+	}
+      obj = wrong_type_argument (Qchar_or_string_p, obj);
+    }
+}
+
+DEFUN ("upcase", Fupcase, Supcase, 1, 2, 0 /*
+Convert argument to upper case and return that.
+The argument may be a character or string.  The result has the same type.
+The argument object is not altered--the value is a copy.
+See also `capitalize', `downcase' and `upcase-initials'.
+Optional second arg BUFFER specifies which buffer's case tables to use,
+ and defaults to the current buffer.
+*/ )
+  (obj, buffer)
+     Lisp_Object obj, buffer;
+{
+  return casify_object (decode_buffer (buffer, 0), CASE_UP, obj);
+}
+
+DEFUN ("downcase", Fdowncase, Sdowncase, 1, 2, 0 /*
+Convert argument to lower case and return that.
+The argument may be a character or string.  The result has the same type.
+The argument object is not altered--the value is a copy.
+Optional second arg BUFFER specifies which buffer's case tables to use,
+ and defaults to the current buffer.
+*/ )
+  (obj, buffer)
+     Lisp_Object obj, buffer;
+{
+  return casify_object (decode_buffer (buffer, 0), CASE_DOWN, obj);
+}
+
+DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 2, 0 /*
+Convert argument to capitalized form and return that.
+This means that each word's first character is upper case
+and the rest is lower case.
+The argument may be a character or string.  The result has the same type.
+The argument object is not altered--the value is a copy.
+Optional second arg BUFFER specifies which buffer's case tables to use,
+ and defaults to the current buffer.
+*/ )
+  (obj, buffer)
+     Lisp_Object obj, buffer;
+{
+  return casify_object (decode_buffer (buffer, 0), CASE_CAPITALIZE, obj);
+}
+
+/* Like Fcapitalize but change only the initials.  */
+
+DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 2, 0 /*
+Convert the initial of each word in the argument to upper case.
+Do not change the other letters of each word.
+The argument may be a character or string.  The result has the same type.
+The argument object is not altered--the value is a copy.
+Optional second arg BUFFER specifies which buffer's case tables to use,
+ and defaults to the current buffer.
+*/ )
+  (obj, buffer)
+     Lisp_Object obj, buffer;
+{
+  return casify_object (decode_buffer (buffer, 0), CASE_CAPITALIZE_UP, obj);
+}
+
+/* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP.
+   b and e specify range of buffer to operate on. */
+
+static void
+casify_region (struct buffer *buf, enum case_action flag, Lisp_Object b,
+	       Lisp_Object e)
+{
+  /* This function can GC */
+  REGISTER Bufpos i;
+  Bufpos start, end;
+  REGISTER Emchar c;
+  REGISTER int inword = flag == CASE_DOWN;
+  Lisp_Object syntax_table = buf->syntax_table;
+  int mccount;
+
+  if (EQ (b, e))
+    /* Not modifying because nothing marked */
+    return;
+
+  get_buffer_range_char (buf, b, e, &start, &end, 0);
+
+  mccount = begin_multiple_change (buf, start, end);
+  record_change (buf, start, end - start);
+  BUF_MODIFF (buf)++;
+
+  for (i = start; i < end; i++)
+    {
+      c = BUF_FETCH_CHAR (buf, i);
+      if (inword && flag != CASE_CAPITALIZE_UP)
+	c = DOWNCASE (buf, c);
+      else if (!UPPERCASEP (buf, c)
+	       && (!inword || flag != CASE_CAPITALIZE_UP))
+	c = UPCASE1 (buf, c);
+
+      buffer_replace_char (buf, i, c, 1, (i == start));
+      /* !!#### need to revalidate the start and end pointers in case
+	 the buffer was changed */
+      if ((int) flag >= (int) CASE_CAPITALIZE)
+	inword = WORD_SYNTAX_P (syntax_table, c);
+    }
+  end_multiple_change (buf, mccount);
+}
+
+DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 3, "r" /*
+Convert the region to upper case.  In programs, wants two arguments.
+These arguments specify the starting and ending character numbers of
+ the region to operate on.  When used as a command, the text between
+ point and the mark is operated on.
+See also `capitalize-region'.
+Optional third arg BUFFER defaults to the current buffer.
+*/ )
+  (b, e, buffer)
+     Lisp_Object b, e, buffer;
+{
+  /* This function can GC */
+  casify_region (decode_buffer (buffer, 1), CASE_UP, b, e);
+  return Qnil;
+}
+
+DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 3, "r" /*
+Convert the region to lower case.  In programs, wants two arguments.
+These arguments specify the starting and ending character numbers of
+ the region to operate on.  When used as a command, the text between
+ point and the mark is operated on.
+Optional third arg BUFFER defaults to the current buffer.
+*/ )
+  (b, e, buffer)
+     Lisp_Object b, e, buffer;
+{
+  /* This function can GC */
+  casify_region (decode_buffer (buffer, 1), CASE_DOWN, b, e);
+  return Qnil;
+}
+
+DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 3, "r" /*
+Convert the region to capitalized form.
+Capitalized form means each word's first character is upper case
+ and the rest of it is lower case.
+In programs, give two arguments, the starting and ending
+ character positions to operate on.
+Optional third arg BUFFER defaults to the current buffer.
+*/ )
+  (b, e, buffer)
+     Lisp_Object b, e, buffer;
+{
+  /* This function can GC */
+  casify_region (decode_buffer (buffer, 1), CASE_CAPITALIZE, b, e);
+  return Qnil;
+}
+
+/* Like Fcapitalize_region but change only the initials.  */
+
+DEFUN ("upcase-initials-region", Fupcase_initials_region,
+       Supcase_initials_region, 2, 3, "r" /*
+Upcase the initial of each word in the region.
+Subsequent letters of each word are not changed.
+In programs, give two arguments, the starting and ending
+ character positions to operate on.
+Optional third arg BUFFER defaults to the current buffer.
+*/ )
+  (b, e, buffer)
+     Lisp_Object b, e, buffer;
+{
+  casify_region (decode_buffer (buffer, 1), CASE_CAPITALIZE_UP, b, e);
+  return Qnil;
+}
+
+
+static Lisp_Object
+operate_on_word (struct buffer *buf, Lisp_Object arg, int *newpoint)
+{
+  Bufpos farend;
+
+  CHECK_INT (arg);
+  farend = scan_words (buf, BUF_PT (buf), XINT (arg));
+  if (!farend)
+    farend = XINT (arg) > 0 ? BUF_ZV (buf) : BUF_BEGV (buf);
+
+  *newpoint = ((BUF_PT (buf) > farend) ? BUF_PT (buf) : farend);
+  return (make_int (farend));
+}
+
+DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 2, "p" /*
+Convert following word (or ARG words) to upper case, moving over.
+With negative argument, convert previous words but do not move.
+See also `capitalize-word'.
+Optional second arg BUFFER defaults to the current buffer.
+*/ )
+  (arg, buffer)
+     Lisp_Object arg, buffer;
+{
+  /* This function can GC */
+  Lisp_Object beg, end;
+  Bufpos newpoint;
+  struct buffer *buf = decode_buffer (buffer, 1);
+
+  beg = make_int (BUF_PT (buf));
+  end = operate_on_word (buf, arg, &newpoint);
+  casify_region (buf, CASE_UP, beg, end);
+  BUF_SET_PT (buf, newpoint);
+  return Qnil;
+}
+
+DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 2, "p" /*
+Convert following word (or ARG words) to lower case, moving over.
+With negative argument, convert previous words but do not move.
+Optional second arg BUFFER defaults to the current buffer.
+*/ )
+  (arg, buffer)
+     Lisp_Object arg, buffer;
+{
+  /* This function can GC */
+  Lisp_Object beg, end;
+  Bufpos newpoint;
+  struct buffer *buf = decode_buffer (buffer, 1);
+
+  beg = make_int (BUF_PT (buf));
+  end = operate_on_word (buf, arg, &newpoint);
+  casify_region (buf, CASE_DOWN, beg, end);
+  BUF_SET_PT (buf, newpoint);
+  return Qnil;
+}
+
+DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 2, "p" /*
+Capitalize the following word (or ARG words), moving over.
+This gives the word(s) a first character in upper case
+ and the rest lower case.
+With negative argument, capitalize previous words but do not move.
+Optional second arg BUFFER defaults to the current buffer.
+*/ )
+  (arg, buffer)
+     Lisp_Object arg, buffer;
+{
+  /* This function can GC */
+  Lisp_Object beg, end;
+  Bufpos newpoint;
+  struct buffer *buf = decode_buffer (buffer, 1);
+
+  beg = make_int (BUF_PT (buf));
+  end = operate_on_word (buf, arg, &newpoint);
+  casify_region (buf, CASE_CAPITALIZE, beg, end);
+  BUF_SET_PT (buf, newpoint);
+  return Qnil;
+}
+
+
+void
+syms_of_casefiddle (void)
+{
+  defsubr (&Supcase);
+  defsubr (&Sdowncase);
+  defsubr (&Scapitalize);
+  defsubr (&Supcase_initials);
+  defsubr (&Supcase_region);
+  defsubr (&Sdowncase_region);
+  defsubr (&Scapitalize_region);
+  defsubr (&Supcase_initials_region);
+  defsubr (&Supcase_word);
+  defsubr (&Sdowncase_word);
+  defsubr (&Scapitalize_word);
+}