static Scheme_Object *
char_to_integer (int argc, Scheme_Object *argv[])
{
mzchar c;
if (!SCHEME_CHARP(argv[0]))
scheme_wrong_type("char->integer", "character", 0, argc, argv);
c = SCHEME_CHAR_VAL(argv[0]);
return scheme_make_integer_value(c);
}
Scheme_Object *
scheme_checked_char_to_integer (int argc, Scheme_Object *argv[])
{
mzchar c;
if (!SCHEME_CHARP(argv[0]))
scheme_wrong_contract("char->integer", "char?", 0, argc, argv);
c = SCHEME_CHAR_VAL(argv[0]);
return scheme_make_integer_value(c);
}
static Scheme_Object *char_general_category (int argc, Scheme_Object *argv[])
{
mzchar c;
int cat;
if (!SCHEME_CHARP(argv[0]))
scheme_wrong_type("char-general-category", "character", 0, argc, argv);
c = SCHEME_CHAR_VAL(argv[0]);
cat = scheme_general_category(c);
return general_category_symbols[cat];
}
static Scheme_Object *char_utf8_length (int argc, Scheme_Object *argv[])
{
mzchar wc;
if (!SCHEME_CHARP(argv[0]))
scheme_wrong_type("char-utf-8-length", "character", 0, argc, argv);
wc = SCHEME_CHAR_VAL(argv[0]);
if (wc < 0x80) {
return scheme_make_integer(1);
} else if (wc < 0x800) {
return scheme_make_integer(2);
} else if (wc < 0x10000) {
return scheme_make_integer(3);
} else if (wc < 0x200000) {
return scheme_make_integer(4);
} else if (wc < 0x4000000) {
return scheme_make_integer(5);
} else {
return scheme_make_integer(6);
}
}
static Scheme_Object *
char_p (int argc, Scheme_Object *argv[])
{
return (SCHEME_CHARP(argv[0]) ? scheme_true : scheme_false);
}
static Scheme_Object *
interned_char_p (int argc, Scheme_Object *argv[])
{
return (SCHEME_CHARP(argv[0]) && SCHEME_CHAR_VAL(argv[0]) < 256) ? scheme_true : scheme_false;
}