uint64_t Value = 0;
unsigned Shift = 0;
do {
- Value += (*p & 0x7f) << Shift;
+ Value += uint64_t(*p & 0x7f) << Shift;
Shift += 7;
} while (*p++ >= 128);
if (n)
return Value;
}
+/// Utility function to decode a SLEB128 value.
+inline int64_t decodeSLEB128(const uint8_t *p, unsigned *n = nullptr) {
+ const uint8_t *orig_p = p;
+ int64_t Value = 0;
+ unsigned Shift = 0;
+ uint8_t Byte;
+ do {
+ Byte = *p++;
+ Value |= ((Byte & 0x7f) << Shift);
+ Shift += 7;
+ } while (Byte >= 128);
+ // Sign extend negative numbers.
+ if (Byte & 0x40)
+ Value |= (-1ULL) << Shift;
+ if (n)
+ *n = (unsigned)(p - orig_p);
+ return Value;
+}
+
+
/// Utility function to get the size of the ULEB128-encoded value.
extern unsigned getULEB128Size(uint64_t Value);