#ifndef LLVM_SUPPORT_LEB128_H
#define LLVM_SUPPORT_LEB128_H
#include "llvm/Support/raw_ostream.h"
namespace llvm {
inline void encodeSLEB128(int64_t Value, raw_ostream &OS) {
bool More;
do {
uint8_t Byte = Value & 0x7f;
Value >>= 7;
More = !((((Value == 0 ) && ((Byte & 0x40) == 0)) ||
((Value == -1) && ((Byte & 0x40) != 0))));
if (More)
Byte |= 0x80; OS << char(Byte);
} while (More);
}
inline void encodeULEB128(uint64_t Value, raw_ostream &OS,
unsigned Padding = 0) {
do {
uint8_t Byte = Value & 0x7f;
Value >>= 7;
if (Value != 0 || Padding != 0)
Byte |= 0x80; OS << char(Byte);
} while (Value != 0);
if (Padding != 0) {
for (; Padding != 1; --Padding)
OS << '\x80';
OS << '\x00';
}
}
inline unsigned encodeULEB128(uint64_t Value, uint8_t *p,
unsigned Padding = 0) {
uint8_t *orig_p = p;
do {
uint8_t Byte = Value & 0x7f;
Value >>= 7;
if (Value != 0 || Padding != 0)
Byte |= 0x80; *p++ = Byte;
} while (Value != 0);
if (Padding != 0) {
for (; Padding != 1; --Padding)
*p++ = '\x80';
*p++ = '\x00';
}
return (unsigned)(p - orig_p);
}
inline uint64_t decodeULEB128(const uint8_t *p, unsigned *n = nullptr) {
const uint8_t *orig_p = p;
uint64_t Value = 0;
unsigned Shift = 0;
do {
Value += uint64_t(*p & 0x7f) << Shift;
Shift += 7;
} while (*p++ >= 128);
if (n)
*n = (unsigned)(p - orig_p);
return Value;
}
extern unsigned getULEB128Size(uint64_t Value);
extern unsigned getSLEB128Size(int64_t Value);
}
#endif // LLVM_SYSTEM_LEB128_H