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gvanrossum committed Dec 26, 1990
1 parent 66a07c0 commit 217a5fa
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176 changes: 176 additions & 0 deletions Lib/dis.py
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# Disassembler

import sys
import string

def dis():
tb = sys.last_traceback
while tb.tb_next: tb = tb.tb_next
distb(tb)

def distb(tb):
disassemble(tb.tb_frame.f_code, tb.tb_lasti)

def disco(co):
disassemble(co, -1)

def disassemble(co, lasti):
code = co.co_code
labels = findlabels(code)
n = len(code)
i = 0
while i < n:
c = code[i]
op = ord(c)
if op = SET_LINENO and i > 0: print # Extra blank line
if i = lasti: print '-->',
else: print ' ',
if i in labels: print '>>',
else: print ' ',
print string.rjust(`i`, 4),
print string.ljust(opname[op], 15),
i = i+1
if op >= HAVE_ARGUMENT:
oparg = ord(code[i]) + ord(code[i+1])*256
i = i+2
print string.rjust(`oparg`, 5),
if op in hasconst:
print '(' + `co.co_consts[oparg]` + ')',
elif op in hasname:
print '(' + co.co_names[oparg] + ')',
elif op in hasjrel:
print '(to ' + `i + oparg` + ')',
print

def findlabels(code):
labels = []
n = len(code)
i = 0
while i < n:
c = code[i]
op = ord(c)
i = i+1
if op >= HAVE_ARGUMENT:
oparg = ord(code[i]) + ord(code[i+1])*256
i = i+2
label = -1
if op in hasjrel:
label = i+oparg
elif op in hasjabs:
label = oparg
if label >= 0:
if label not in labels:
labels.append(label)
return labels

hasconst = []
hasname = []
hasjrel = []
hasjabs = []

opname = range(256)
for op in opname: opname[op] = '<' + `op` + '>'

def def_op(name, op):
opname[op] = name

def name_op(name, op):
opname[op] = name
hasname.append(op)

def jrel_op(name, op):
opname[op] = name
hasjrel.append(op)

def jabs_op(name, op):
opname[op] = name
hasjabs.append(op)

# Instruction opcodes for compiled code

def_op('STOP_CODE', 0)
def_op('POP_TOP', 1)
def_op('ROT_TWO', 2)
def_op('ROT_THREE', 3)
def_op('DUP_TOP', 4)

def_op('UNARY_POSITIVE', 10)
def_op('UNARY_NEGATIVE', 11)
def_op('UNARY_NOT', 12)
def_op('UNARY_CONVERT', 13)
def_op('UNARY_CALL', 14)

def_op('BINARY_MULTIPLY', 20)
def_op('BINARY_DIVIDE', 21)
def_op('BINARY_MODULO', 22)
def_op('BINARY_ADD', 23)
def_op('BINARY_SUBTRACT', 24)
def_op('BINARY_SUBSCR', 25)
def_op('BINARY_CALL', 26)

def_op('SLICE+0', 30)
def_op('SLICE+1', 31)
def_op('SLICE+2', 32)
def_op('SLICE+3', 33)

def_op('STORE_SLICE+0', 40)
def_op('STORE_SLICE+1', 41)
def_op('STORE_SLICE+2', 42)
def_op('STORE_SLICE+3', 43)

def_op('DELETE_SLICE+0', 50)
def_op('DELETE_SLICE+1', 51)
def_op('DELETE_SLICE+2', 52)
def_op('DELETE_SLICE+3', 53)

def_op('STORE_SUBSCR', 60)
def_op('DELETE_SUBSCR', 61)

def_op('PRINT_EXPR', 70)
def_op('PRINT_ITEM', 71)
def_op('PRINT_NEWLINE', 72)

def_op('BREAK_LOOP', 80)
def_op('RAISE_EXCEPTION', 81)
def_op('LOAD_LOCALS', 82)
def_op('RETURN_VALUE', 83)
def_op('REQUIRE_ARGS', 84)
def_op('REFUSE_ARGS', 85)
def_op('BUILD_FUNCTION', 86)
def_op('POP_BLOCK', 87)
def_op('END_FINALLY', 88)
def_op('BUILD_CLASS', 89)

HAVE_ARGUMENT = 90 # Opcodes from here have an argument:

name_op('STORE_NAME', 90) # Index in name list
name_op('DELETE_NAME', 91) # ""
def_op('UNPACK_TUPLE', 92) # Number of tuple items
def_op('UNPACK_LIST', 93) # Number of list items
# unused: 94
name_op('STORE_ATTR', 95) # Index in name list
name_op('DELETE_ATTR', 96) # ""

def_op('LOAD_CONST', 100) # Index in const list
hasconst.append(100)
name_op('LOAD_NAME', 101) # Index in name list
def_op('BUILD_TUPLE', 102) # Number of tuple items
def_op('BUILD_LIST', 103) # Number of list items
def_op('BUILD_MAP', 104) # Always zero for now
name_op('LOAD_ATTR', 105) # Index in name list
def_op('COMPARE_OP', 106) # Comparison operator
name_op('IMPORT_NAME', 107) # Index in name list
name_op('IMPORT_FROM', 108) # Index in name list

jrel_op('JUMP_FORWARD', 110) # Number of bytes to skip
jrel_op('JUMP_IF_FALSE', 111) # ""
jrel_op('JUMP_IF_TRUE', 112) # ""
jabs_op('JUMP_ABSOLUTE', 113) # Target byte offset from beginning of code
jrel_op('FOR_LOOP', 114) # Number of bytes to skip

jrel_op('SETUP_LOOP', 120) # Distance to target address
jrel_op('SETUP_EXCEPT', 121) # ""
jrel_op('SETUP_FINALLY', 122) # ""

def_op('SET_LINENO', 127) # Current line number
SET_LINENO = 127
32 changes: 32 additions & 0 deletions Lib/grep.py
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# 'grep'

import regexp
import string

def grep(expr, filename):
prog = regexp.compile(expr)
fp = open(filename, 'r')
lineno = 0
while 1:
line = fp.readline()
if not line: break
lineno = lineno + 1
res = prog.exec(line)
if res:
#print res
start, end = res[0]
if line[-1:] = '\n': line = line[:-1]
prefix = string.rjust(`lineno`, 3) + ': '
print prefix + line
if 0:
line = line[:start]
if '\t' not in line:
prefix = ' ' * (len(prefix) + start)
else:
prefix = ' ' * len(prefix)
for c in line:
if c <> '\t': c = ' '
prefix = prefix + c
if start = end: prefix = prefix + '\\'
else: prefix = prefix + '^'*(end-start)
print prefix
32 changes: 32 additions & 0 deletions Lib/lib-old/grep.py
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# 'grep'

import regexp
import string

def grep(expr, filename):
prog = regexp.compile(expr)
fp = open(filename, 'r')
lineno = 0
while 1:
line = fp.readline()
if not line: break
lineno = lineno + 1
res = prog.exec(line)
if res:
#print res
start, end = res[0]
if line[-1:] = '\n': line = line[:-1]
prefix = string.rjust(`lineno`, 3) + ': '
print prefix + line
if 0:
line = line[:start]
if '\t' not in line:
prefix = ' ' * (len(prefix) + start)
else:
prefix = ' ' * len(prefix)
for c in line:
if c <> '\t': c = ' '
prefix = prefix + c
if start = end: prefix = prefix + '\\'
else: prefix = prefix + '^'*(end-start)
print prefix
48 changes: 48 additions & 0 deletions Lib/lib-old/packmail.py
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# Module 'packmail' -- create a shell script out of some files.

import mac
import macpath
from stat import ST_MTIME

# Pack one file
def pack(outfp, file, name):
fp = open(file, 'r')
outfp.write('sed "s/^X//" >' + name + ' <<"!"\n')
while 1:
line = fp.readline()
if not line: break
if line[-1:] <> '\n':
line = line + '\n'
outfp.write('X' + line)
outfp.write('!\n')

# Pack some files from a directory
def packsome(outfp, dirname, names):
for name in names:
print name
file = macpath.cat(dirname, name)
pack(outfp, file, name)

# Pack all files from a directory
def packall(outfp, dirname):
names = mac.listdir(dirname)
names.sort()
packsome(outfp, dirname, names)

# Pack all files from a directory that are not older than a give one
def packnotolder(outfp, dirname, oldest):
names = mac.listdir(dirname)
oldest = macpath.cat(dirname, oldest)
st = mac.stat(oldest)
mtime = st[ST_MTIME]
todo = []
for name in names:
print name, '...',
st = mac.stat(macpath.cat(dirname, name))
if st[ST_MTIME] >= mtime:
print 'Yes.'
todo.append(name)
else:
print 'No.'
todo.sort()
packsome(outfp, dirname, todo)

1 comment on commit 217a5fa

@ypankovych
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does it actually work?

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