vsnprintf.c: initialize cp

* vsnprintf.c (BSD_vfprintf): initialize cp so that size is 0 in the
  commented case.  fix an accidental bug at r16716.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42977 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 62 insertions, 0 deletions

diff --git a/ext/-test-/printf/printf.c b/ext/-test-/printf/printf.c
index 28a158beb4..53aad85f19 100644
--- a/ext/-test-/printf/printf.c
+++ b/ext/-test-/printf/printf.c
@@ -27,6 +27,67 @@ printf_test_q(VALUE self, VALUE obj)
     return rb_enc_sprintf(rb_usascii_encoding(), "[% "PRIsVALUE"]", obj);
 }
 
+static char *
+utoa(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;
+    char format[sizeof(int) * 6 + 8], *p = format, cnv;
+    int n;
+
+    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': break;
+      default: rb_raise(rb_eArgError, "wrong conversion(%c)", cnv);
+    }
+    n = NUM2INT(num);
+    *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 = utoa(p, format + sizeof(format), NUM2UINT(v));
+	}
+	if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("prec"))))) {
+	    *p++ = '.';
+	    if (FIXNUM_P(v))
+		p = utoa(p, p + sizeof(format), NUM2UINT(v));
+	}
+    }
+    *p++ = cnv;
+    *p++ = '\0';
+    return rb_assoc_new(rb_enc_sprintf(rb_usascii_encoding(), format, n),
+			rb_usascii_str_new_cstr(format));
+}
+
 void
 Init_printf(void)
 {
@@ -35,4 +96,5 @@ Init_printf(void)
     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);
 }