idc.py 文件源码

def GetPrevConst(enum_id, value, bmask):
    """
    Get prev constant in the enum

    @param enum_id: id of enum
    @param bmask  : bitmask of the constant
              ordinary enums accept only -1 as a bitmask
    @param value: value of the current constant

    @return: value of a constant with value lower than the specified
        value. -1 no such constants exist.
        All constants are sorted by their values as unsigned longs.
    """
    if bmask < 0:
        bmask &= BADADDR
    return idaapi.get_prev_enum_member(enum_id, value, bmask)