电脑小白: 汇编 - python 进制转换器

我最近又回到汇编的怀抱，在学习过程涉及不少的 2 进制数目, 16 进制数目, 需要好的进制转换器来帮助学习。

网上有不少进制转换器，但有些 output 是不准确的，有些放太大的数目会不准确/hang掉, 再者，没有分空行， 101111111 连在一起不是人看的。

不准确的 output:

放太大的数目等很久, copy hang掉, 111--..111 也是错误的。

我用 python 撰写了 2, 10, 16 位进制转换器， output 自己喜欢的 style。

#Author: <limkokhole@facebook.com>
#Reference: http://stackoverflow.com/questions/3258330/converting-from-hex-to-binary-without-losing-leading-0s-python

'''
Valid input for all function:
1. No space in between
e.g. b('10 10')
e.g. x('10 10')

Valid input for x():
1. Don't put 0x infront
e.g. x(0x1010), x('0x1010')
2. Always surround by string, bcoz it would error if consists of a, b, c, d, e, f
e.g. x('a')
3. print eflags
e.g. x('1a', f=1)
4. Prettyprint to 3 bits
e.g. x('1a', n=3)
Binary  32 -bit(Pretty): 0000,0000  0000,0000  0000,0000  0001,1010
    become
Binary  32 -bit(Pretty): 00  000  000  000  000  000  000  000  000  011  010

Valid input for b():
'''

def chunks(l, n):
    return [l[i:i+n] for i in range(0, len(l), n)]

def x(h, n=8, f=False):
    #h = 'FA'
    split_token = "  "
    sh = str(h).replace("L", "")
    ii = int('1'+str(sh), 16)
    orig_b = bin(ii)[3:]
    b = orig_b.zfill(32)
    br1 = b[::-1]
    c = split_token.join(chunks(br1, n))
    br2 = c[::-1]
    print "Hex:", h, "\n"
    if n > 4:
        t1 = br2.split(split_token)
        t3 = ""
        for t2 in t1:
            t3 = t3 + ",".join(chunks(t2, 4)) + split_token
        br2 = t3
    print "Binary ", len(orig_b), "-bit:", orig_b, "\n"
    print "Binary ", len(b), "-bit:", b, "\n"
    print "Binary ", len(b), "-bit(Pretty):", br2, "\n"
    print "Decimal:", int(sh, 16), "\n"
    if f:
        print flags

def d(di, n=8, f=False):
    dx = hex(int(di))
    dx = dx.replace("0x", "", 1)
    x(dx, n=n, f=f)
    
def b(bi, n=8, f=False):
    bx = hex(int(str(bi), 2))
    bx = bx.replace("0x", "", 1)
    x(bx, n=n, f=f)

flags = "\
._._ID_VIP  VIF_AC_VM_RF  ._NT_IOPL_IOPL  OF_DF_IF_TF  SF_ZF_._AF  ._PF_._CF \n\
\n\
CF - Carry flag \n\
PF - Parity flag \n\
AF - Adjust flag \n\
ZF - Zero flag \n\
SF - Sign flag \n\
TF - Trap flag(single step) \n\
IF - Interrupt enable flag \n\
DF - Direction flag \n\
OF - Overflow flag \n\
 \n\
IOPL - I/O privilege level (286+ only), always 1 on 8086 and 186 \n\
NT - Nested task flag (286+ only), always 1 on 8086 and 186 \n\
RF - Resume flag \n\
VM - Virtual 8086 mode flag (386+ only) \n\
AC - Alignment check (486SX+ only) \n\
VIF - Virtual interrupt flag (Pentium+) \n\
VIP - Virtual interrupt pending (Pentium+) \n\
ID - Able to use CPUID instruction (Pentium+) \n\
"