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#include <ruby.h>
#include <ruby/encoding.h>
static VALUE
printf_test_s(VALUE self, VALUE obj)
{
return rb_enc_sprintf(rb_usascii_encoding(), "<%"PRIsVALUE">", obj);
}
static VALUE
printf_test_v(VALUE self, VALUE obj)
{
return rb_enc_sprintf(rb_usascii_encoding(), "{%+"PRIsVALUE"}", obj);
}
static VALUE
printf_test_q(VALUE self, VALUE obj)
{
return rb_enc_sprintf(rb_usascii_encoding(), "[% "PRIsVALUE"]", obj);
}
static char *
uint_to_str(char *p, char *e, unsigned int x)
{
char *e0 = e;
if (e <= p) return p;
do {
*--e = x % 10 + '0';
} while ((x /= 10) != 0 && e > p);
memmove(p, e, e0 - e);
return p + (e0 - e);
}
static VALUE
printf_test_call(int argc, VALUE *argv, VALUE self)
{
VALUE opt, type, num, result;
char format[sizeof(int) * 6 + 8], *p = format, cnv;
int n = 0;
const char *s = 0;
rb_scan_args(argc, argv, "2:", &type, &num, &opt);
Check_Type(type, T_STRING);
if (RSTRING_LEN(type) != 1) rb_raise(rb_eArgError, "wrong length(%ld)", RSTRING_LEN(type));
switch (cnv = RSTRING_PTR(type)[0]) {
case 'd': case 'x': case 'o': case 'X':
n = NUM2INT(num);
break;
case 's':
s = StringValueCStr(num);
break;
default: rb_raise(rb_eArgError, "wrong conversion(%c)", cnv);
}
*p++ = '%';
if (!NIL_P(opt)) {
VALUE v;
Check_Type(opt, T_HASH);
if (RTEST(rb_hash_aref(opt, ID2SYM(rb_intern("space"))))) {
*p++ = ' ';
}
if (RTEST(rb_hash_aref(opt, ID2SYM(rb_intern("hash"))))) {
*p++ = '#';
}
if (RTEST(rb_hash_aref(opt, ID2SYM(rb_intern("plus"))))) {
*p++ = '+';
}
if (RTEST(rb_hash_aref(opt, ID2SYM(rb_intern("minus"))))) {
*p++ = '-';
}
if (RTEST(rb_hash_aref(opt, ID2SYM(rb_intern("zero"))))) {
*p++ = '0';
}
if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("width"))))) {
p = uint_to_str(p, format + sizeof(format), NUM2UINT(v));
}
if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("prec"))))) {
*p++ = '.';
if (FIXNUM_P(v))
p = uint_to_str(p, format + sizeof(format), NUM2UINT(v));
}
}
*p++ = cnv;
*p++ = '\0';
if (cnv == 's') {
result = rb_enc_sprintf(rb_usascii_encoding(), format, s);
}
else {
result = rb_enc_sprintf(rb_usascii_encoding(), format, n);
}
return rb_assoc_new(result, rb_usascii_str_new_cstr(format));
}
void
Init_printf(void)
{
VALUE m = rb_define_module_under(rb_define_module("Bug"), "Printf");
rb_define_singleton_method(m, "s", printf_test_s, 1);
rb_define_singleton_method(m, "v", printf_test_v, 1);
rb_define_singleton_method(m, "q", printf_test_q, 1);
rb_define_singleton_method(m, "call", printf_test_call, -1);
}
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