diff options
Diffstat (limited to 'binutils-2.22/gold/int_encoding.h')
-rw-r--r-- | binutils-2.22/gold/int_encoding.h | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/binutils-2.22/gold/int_encoding.h b/binutils-2.22/gold/int_encoding.h index 6485a93..467d224 100644 --- a/binutils-2.22/gold/int_encoding.h +++ b/binutils-2.22/gold/int_encoding.h @@ -38,16 +38,48 @@ namespace gold // // Read a ULEB 128 encoded integer from BUFFER. Return the length of the -// encoded integer at the location PLEN. +// encoded integer at the location PLEN. The common case of a single-byte +// value is handled inline, and multi-byte values are processed by the _x +// routine, where BYTE is the first byte of the value. uint64_t -read_unsigned_LEB_128(const unsigned char* buffer, size_t* plen); +read_unsigned_LEB_128_x(const unsigned char* buffer, size_t* plen, + unsigned char byte); + +inline uint64_t +read_unsigned_LEB_128(const unsigned char* buffer, size_t* plen) +{ + unsigned char byte = *buffer++; + + if ((byte & 0x80) != 0) + return read_unsigned_LEB_128_x(buffer, plen, byte); + + *plen = 1; + return static_cast<uint64_t>(byte); +} // Read an SLEB 128 encoded integer from BUFFER. Return the length of the -// encoded integer at the location PLEN. +// encoded integer at the location PLEN. The common case of a single-byte +// value is handled inline, and multi-byte values are processed by the _x +// routine, where BYTE is the first byte of the value. int64_t -read_signed_LEB_128(const unsigned char* buffer, size_t* plen); +read_signed_LEB_128_x(const unsigned char* buffer, size_t* plen, + unsigned char byte); + +inline int64_t +read_signed_LEB_128(const unsigned char* buffer, size_t* plen) +{ + unsigned char byte = *buffer++; + + if ((byte & 0x80) != 0) + return read_signed_LEB_128_x(buffer, plen, byte); + + *plen = 1; + if (byte & 0x40) + return -(static_cast<int64_t>(1) << 7) | static_cast<int64_t>(byte); + return static_cast<int64_t>(byte); +} // Write a ULEB 128 encoded VALUE to BUFFER. |