+/********************************/
+/* */
+/* Interface for characters */
+/* */
+/********************************/
+/*
+ valid_char_p (ch):
+ Return whether the given Emchar is valid.
+
+ CHARP (ch):
+ Return whether the given Lisp_Object is a character.
+
+ CHECK_CHAR_COERCE_INT (ch):
+ Signal an error if CH is not a valid character or integer
+ Lisp_Object.
+ If CH is an integer Lisp_Object, convert it to a character
+ Lisp_Object, but merely by repackaging, without performing
+ tests for char validity.
+
+Functions/macros when MULE is defined:
+
+ CHAR_ASCII_P (ch):
+ Return whether the given Emchar is ASCII.
+
+ MAKE_CHAR (CHARSET, B1, B2):
+ Return a character whose coded-charset is CHARSET and
+ position-codes are B1 and B2. 1 byte character ignores B2.
+
+ BREAKUP_CHAR (ch, charset, B1, B2):
+ Break up the given Emchar, and store found coded-charset and
+ position-codes to CHARSET, B1 and B2.
+
+ CHAR_CHARSET (CH):
+ Return coded-charset object of Emchar CH.
+
+ CHAR_LEADING_BYTE (CH):
+ Return Charset-ID of Emchar CH.
+*/
+
+#define CHAR_INTP(x) (INTP (x) && valid_char_p (XINT (x)))
+
+#define CHAR_OR_CHAR_INTP(x) (CHARP (x) || CHAR_INTP (x))
+
+#ifdef ERROR_CHECK_TYPECHECK
+
+INLINE_HEADER Emchar XCHAR_OR_CHAR_INT (Lisp_Object obj);
+INLINE_HEADER Emchar
+XCHAR_OR_CHAR_INT (Lisp_Object obj)
+{
+ assert (CHAR_OR_CHAR_INTP (obj));
+ return CHARP (obj) ? XCHAR (obj) : XINT (obj);
+}
+
+#else
+
+#define XCHAR_OR_CHAR_INT(obj) (CHARP ((obj)) ? XCHAR ((obj)) : XINT ((obj)))
+
+#endif
+
+#define CHECK_CHAR_COERCE_INT(x) do { \
+ if (CHARP (x)) \
+ ; \
+ else if (CHAR_INTP (x)) \
+ x = make_char (XINT (x)); \
+ else \
+ x = wrong_type_argument (Qcharacterp, x); \
+} while (0)
+