shithub: femtolisp

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add function `char-alphabetic?`

--- a/string.c

+++ b/string.c

@@ -242,6 +242,15 @@

     return mk_wchar(towlower(*(int32_t*)cp_data(cp)));

 }

+value_t fl_char_alpha(value_t *args, u_int32_t nargs)

+{

+    argcount("char-alphabetic?", nargs, 1);

+    cprim_t *cp = (cprim_t*)ptr(args[0]);

+    if (!iscprim(args[0]) || cp_class(cp) != wchartype)

+        type_error("char-alphabetic?", "wchar", args[0]);

+    return iswalpha(*(int32_t*)cp_data(cp)) ? FL_T : FL_F;

+}

+

 static value_t mem_find_byte(char *s, char c, size_t start, size_t len)

 {

     char *p = memchr(s+start, c, len-start);

@@ -412,6 +421,7 @@

     { "char.upcase", fl_char_upcase },

     { "char.downcase", fl_char_downcase },

+    { "char-alphabetic?", fl_char_alpha },

     { "number->string", fl_numbertostring },

     { "string->number", fl_stringtonumber },