X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/ab5796a9f97180707734a81320e3eb81937281fe..73f0d9965568d40bc84eaa82ca6c3e55eac82e8f:/src/charset.c

diff --git a/src/charset.c b/src/charset.c
index 7015213935..c03107a9c4 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -1,7 +1,7 @@
 /* Basic multilingual character support.
    Copyright (C) 1995, 1997, 1998 Electrotechnical Laboratory, JAPAN.
    Licensed to the Free Software Foundation.
-   Copyright (C) 2001 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2004 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -730,7 +730,7 @@ It includes a generic character for a charset not yet defined.  */)
 
 DEFUN ("get-unused-iso-final-char", Fget_unused_iso_final_char,
        Sget_unused_iso_final_char, 2, 2, 0,
-       doc: /* Return an unsed ISO's final char for a charset of DIMENISION and CHARS.
+       doc: /* Return an unused ISO's final char for a charset of DIMENSION and CHARS.
 DIMENSION is the number of bytes to represent a character: 1 or 2.
 CHARS is the number of characters in a dimension: 94 or 96.
 
@@ -760,17 +760,20 @@ return nil.  */)
 
 DEFUN ("declare-equiv-charset", Fdeclare_equiv_charset, Sdeclare_equiv_charset,
        4, 4, 0,
-       doc: /* Declare a charset of DIMENSION, CHARS, FINAL-CHAR is the same as CHARSET.
-CHARSET should be defined by `defined-charset' in advance.  */)
-     (dimension, chars, final_char, charset_symbol)
-     Lisp_Object dimension, chars, final_char, charset_symbol;
+       doc: /* Declare an equivalent charset for ISO-2022 decoding.
+
+On decoding by an ISO-2022 base coding system, when a charset
+specified by DIMENSION, CHARS, and FINAL-CHAR is designated, behave as
+if CHARSET is designated instead.  */)
+     (dimension, chars, final_char, charset)
+     Lisp_Object dimension, chars, final_char, charset;
 {
-  int charset;
+  int charset_id;
 
   CHECK_NUMBER (dimension);
   CHECK_NUMBER (chars);
   CHECK_NUMBER (final_char);
-  CHECK_SYMBOL (charset_symbol);
+  CHECK_SYMBOL (charset);
 
   if (XINT (dimension) != 1 && XINT (dimension) != 2)
     error ("Invalid DIMENSION %d, it should be 1 or 2", XINT (dimension));
@@ -778,10 +781,10 @@ CHARSET should be defined by `defined-charset' in advance.  */)
     error ("Invalid CHARS %d, it should be 94 or 96", XINT (chars));
   if (XINT (final_char) < '0' || XFASTINT (final_char) > '~')
     error ("Invalid FINAL-CHAR %c, it should be `0'..`~'", XINT (chars));
-  if ((charset = get_charset_id (charset_symbol)) < 0)
-    error ("Invalid charset %s", SDATA (SYMBOL_NAME (charset_symbol)));
+  if ((charset_id = get_charset_id (charset)) < 0)
+    error ("Invalid charset %s", SDATA (SYMBOL_NAME (charset)));
 
-  ISO_CHARSET_TABLE (dimension, chars, final_char) = charset;
+  ISO_CHARSET_TABLE (dimension, chars, final_char) = charset_id;
   return Qnil;
 }
 
@@ -1025,9 +1028,9 @@ Internal use only.  */)
 }
 
 DEFUN ("split-char", Fsplit_char, Ssplit_char, 1, 1, 0,
-       doc: /* Return list of charset and one or two position-codes of CHAR.
-If CHAR is invalid as a character code,
-return a list of symbol `unknown' and CHAR.  */)
+       doc: /* Return list of charset and one or two position-codes of CH.
+If CH is invalid as a character code,
+return a list of symbol `unknown' and CH.  */)
      (ch)
      Lisp_Object ch;
 {
@@ -1045,7 +1048,7 @@ return a list of symbol `unknown' and CHAR.  */)
 }
 
 DEFUN ("char-charset", Fchar_charset, Schar_charset, 1, 1, 0,
-       doc: /* Return charset of CHAR.  */)
+       doc: /* Return charset of CH.  */)
      (ch)
      Lisp_Object ch;
 {
@@ -1176,7 +1179,7 @@ The conversion is done based on `nonascii-translation-table' (which see)
 }
 
 DEFUN ("char-bytes", Fchar_bytes, Schar_bytes, 1, 1, 0,
-       doc: /* Return 1 regardless of the argument CHAR.  */)
+       doc: /* Return 1 regardless of the argument CH.  */)
      (ch)
      Lisp_Object ch;
 {
@@ -1220,7 +1223,7 @@ char_bytes (c)
 	    : 4))))
 
 DEFUN ("char-width", Fchar_width, Schar_width, 1, 1, 0,
-       doc: /* Return width of CHAR when displayed in the current buffer.
+       doc: /* Return width of CH when displayed in the current buffer.
 The width is measured by how many columns it occupies on the screen.
 Tab is taken to occupy `tab-width' columns.  */)
      (ch)
@@ -1403,18 +1406,18 @@ When calculating width of a multibyte character in STRING,
 only the base leading-code is considered; the validity of
 the following bytes is not checked.  Tabs in STRING are always
 taken to occupy `tab-width' columns.  */)
-     (str)
-     Lisp_Object str;
+     (string)
+     Lisp_Object string;
 {
   Lisp_Object val;
 
-  CHECK_STRING (str);
-  XSETFASTINT (val, lisp_string_width (str, -1, NULL, NULL));
+  CHECK_STRING (string);
+  XSETFASTINT (val, lisp_string_width (string, -1, NULL, NULL));
   return val;
 }
 
 DEFUN ("char-direction", Fchar_direction, Schar_direction, 1, 1, 0,
-       doc: /* Return the direction of CHAR.
+       doc: /* Return the direction of CH.
 The returned value is 0 for left-to-right and 1 for right-to-left.  */)
      (ch)
      Lisp_Object ch;
@@ -1642,11 +1645,16 @@ usage: (string &rest CHARACTERS)  */)
      int n;
      Lisp_Object *args;
 {
-  int i;
-  unsigned char *buf = (unsigned char *) alloca (MAX_MULTIBYTE_LENGTH * n);
-  unsigned char *p = buf;
+  int i, bufsize;
+  unsigned char *buf, *p;
   int c;
   int multibyte = 0;
+  Lisp_Object ret;
+  USE_SAFE_ALLOCA;
+
+  bufsize = MAX_MULTIBYTE_LENGTH * n;
+  SAFE_ALLOCA (buf, unsigned char *, bufsize);
+  p = buf;
 
   for (i = 0; i < n; i++)
     {
@@ -1664,7 +1672,10 @@ usage: (string &rest CHARACTERS)  */)
 	*p++ = c;
     }
 
-  return make_string_from_bytes (buf, n, p - buf);
+  ret = make_string_from_bytes (buf, n, p - buf);
+  SAFE_FREE ();
+
+  return ret;
 }
 
 #endif /* emacs */