javaprims.h (_Jv_FormatInt): New declaration.

* gcj/javaprims.h (_Jv_FormatInt):  New declaration.
	* java/lang/natString.cc (_JvFormatInt):  New primitive, with logic
	taken from old Integer.toString code.
	(Integer::valueOf):  Use _Jv_FormatInt.
	* java/lang/Integer.java (toString):  Just use call String.valueOf.
	* java/lang/Long.java (toString):  Fix typo in comment.
	* java/lang/String.java (valueOf(int)):  Make native.
	* java/lang/StringBuffer.java (append(int)):  Make native.
	* java/lang/natStringBuffer.cc:  New file, for append(jint).
	* Makefile.am (ant_source_files):  Add java/lang/natStringBuffer.cc.

From-SVN: r42419

libjava/java/lang/natString.cc

@@ -341,6 +341,52 @@ _Jv_GetStringUTFRegion (jstring str, jsize start, jsize len, char *buf)
   return dptr - buf;
 }
 
+/* Put printed (decimal) representation of NUM in a buffer.
+   BUFEND marks the end of the buffer, which must be at least 11 jchars long.
+   Returns the COUNT of jchars written.  The result is in
+   (BUFEND - COUNT) (inclusive) upto (BUFEND) (exclusive). */
+
+jint
+_Jv_FormatInt (jchar* bufend, jint num)
+{
+  register jchar* ptr = bufend;
+  jboolean isNeg;
+  if (num < 0)
+    {
+      isNeg = true;
+      num = -(num);
+      if (num < 0)
+	{
+	  // Must be MIN_VALUE, so handle this special case.
+	  // FIXME use 'unsigned jint' for num.
+	  *--ptr = '8';
+	  num = 214748364;
+	}
+      }
+    else
+      isNeg = false;
+
+    do
+      {
+        *--ptr = (jchar) ((int) '0' + (num % 10));
+        num /= 10;
+      }
+    while (num > 0);
+
+    if (isNeg)
+      *--ptr = '-';
+    return bufend - ptr;
+}
+
+jstring
+java::lang::String::valueOf (jint num)
+{
+  // Use an array large enough for "-2147483648"; i.e. 11 chars.
+  jchar buffer[11];
+  int i = _Jv_FormatInt (buffer+11, num);
+  return _Jv_NewString (buffer+11-i, i);
+}
+
 jstring
 _Jv_AllocString(jsize len)
 {