+/* Read an unsigned leb128 value from P, store the value in VAL, return
+ P incremented past the value. We assume that a word is large enough to
+ hold any value so encoded; if it is smaller than a pointer on some target,
+ pointers should not be leb128 encoded on that target. */
+
+static const unsigned char *
+read_uleb128 (const unsigned char *p, _uleb128_t *val)
+{
+ unsigned int shift = 0;
+ unsigned char byte;
+ _uleb128_t result;
+
+ result = 0;
+ do
+ {
+ byte = *p++;
+ result |= ((_uleb128_t)byte & 0x7f) << shift;
+ shift += 7;
+ }
+ while (byte & 0x80);
+
+ *val = result;
+ return p;
+}
+
+/* Similar, but read a signed leb128 value. */
+
+static const unsigned char *
+read_sleb128 (const unsigned char *p, _sleb128_t *val)
+{
+ unsigned int shift = 0;
+ unsigned char byte;
+ _uleb128_t result;
+
+ result = 0;
+ do
+ {
+ byte = *p++;
+ result |= ((_uleb128_t)byte & 0x7f) << shift;
+ shift += 7;
+ }
+ while (byte & 0x80);
+
+ /* Sign-extend a negative value. */
+ if (shift < 8 * sizeof(result) && (byte & 0x40) != 0)
+ result |= -(((_uleb128_t)1L) << shift);
+
+ *val = (_sleb128_t) result;
+ return p;
+}
+