+ static int int8(int[] bytes, int i) {
+ return (int) (byte) bytes[i];
+ }
+
+ static int uint8(int[] bytes, int i) {
+ return bytes[i];
+ }
+
+ static int int16(int[] bytes, int i) {
+ return (int) (short) (bytes[i] + (bytes[i+1] << 8));
+ }
+
+ static int uint16(int[] bytes, int i) {
+ return bytes[i] + (bytes[i+1] << 8);
+ }
+
+ static int uint32(int[] bytes, int i) {
+ return bytes[i] +
+ (bytes[i+1] << 8) +
+ (bytes[i+2] << 16) +
+ (bytes[i+3] << 24);
+ }
+
+ static final Charset unicode_set = Charset.forName("UTF-8");
+
+ static String string(int[] bytes, int s, int l) {
+ if (s + l > bytes.length) {
+ if (s > bytes.length) {
+ s = bytes.length;
+ l = 0;
+ } else {
+ l = bytes.length - s;
+ }
+ }
+
+ int i;
+ for (i = l - 1; i >= 0; i--)
+ if (bytes[s+i] != 0)
+ break;
+
+ l = i + 1;
+ byte[] b = new byte[l];
+
+ for (i = 0; i < l; i++)
+ b[i] = (byte) bytes[s+i];
+ String n = new String(b, unicode_set);
+ return n;
+ }
+
+ static int hexbyte(String s, int i) {
+ int c0, c1;
+
+ if (s.length() < i + 2)
+ throw new NumberFormatException(String.format("invalid hex \"%s\"", s));
+ c0 = s.charAt(i);
+ if (!Altos.ishex(c0))
+ throw new NumberFormatException(String.format("invalid hex \"%c\"", c0));
+ c1 = s.charAt(i+1);
+ if (!Altos.ishex(c1))
+ throw new NumberFormatException(String.format("invalid hex \"%c\"", c1));
+ return Altos.fromhex(c0) * 16 + Altos.fromhex(c1);
+ }
+
+ static int[] hexbytes(String s) {
+ int n;
+ int[] r;
+ int i;
+
+ if ((s.length() & 1) != 0)
+ throw new NumberFormatException(String.format("invalid line \"%s\"", s));
+ n = s.length() / 2;
+ r = new int[n];
+ for (i = 0; i < n; i++)
+ r[i] = Altos.hexbyte(s, i * 2);
+ return r;
+ }
+