LEB128UNSIGNEDDECODE64(3E) LEB128UNSIGNEDDECODE64(3E) NAME leb128unsigneddecode64: leb128signeddecode64: leb128unsigneddecode32: leb128signeddecode32 - decode leb128 integers SYNOPSIS #include <cmplrs/leb128.h> int leb128unsigneddecode64(char* data, uint64t* value); int leb128signeddecode64(char* data, int64t* value); int leb128unsigneddecode32(char* data, uint32t* value); int leb128signeddecode32(char* data, int32t* value); DESCRIPTION These routines decode leb128 numbers into the integers they encode. The leb128 format is a variable-length encoding extensively used in the DWARF debugging information format and is described in the DWARF documentation. The caller must know if the leb128 number data in hand is 32 or 64 bit and if it is signed or unsigned: nothing in the leb128 format makes it possible to determine this from the input data itself. If a data points to a number which fits in 32 bits either the 32bit or 64bit decoding routine may be called: the correct value is returned through the value pointer. If data points at a number too large to fit in 32 bits both the returned-value *and* the number of bytes returned by either of the 32-bit functions will be incorrect. The decoded number is placed into data and the number of bytes of data which held the number is returned. Link with the option -lelfutil to link in these routines. The arguments are as follows: data is a pointer to the input number to be converted from leb128 format into an integer. value is a pointer to properly aligned space (provided by the caller) to which the called routine writes the decoded integer value. FILES /usr/include/cmplrs/leb128.h /usr/lib/libelfutil.a /usr/lib32/libelfutil.a /usr/lib64/libelfutil.a Page 1
LEB128UNSIGNEDDECODE64(3E) LEB128UNSIGNEDDECODE64(3E) DIAGNOSTICS Returns the number of bytes found and used in decoding the number. The returned value will be in the range 1 to 5 for the 32-bit number input versions. The returned value will be in the range 1 to 10 for the 64-bit number input versions. If a number is erroneously encoded for the call (if the decoded value will not fit in the provided value pointed to) there is no error indication: instead a value is returned and the length returned is 5 (for the 32bit versions) or 10 (for the 64bit versions). SEE ALSO libelfutil(5), xlate(4), _leb128_unsigned_encode64, _leb128_unsigned_encode32, _leb128_signed_encode64, _leb128_signed_encode32, DWARF Debugging Information Format , A Consumer Library Interface to DWARF Page 2