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Add getlineno() routine to account for LINENO optimization.

This commit is contained in:
Ka-Ping Yee 2001-03-01 03:55:35 +00:00
parent abb379e189
commit 59ade08079
1 changed files with 19 additions and 3 deletions
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22
Lib/inspect.py
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@ -560,20 +560,36 @@ def getframeinfo(frame, context=1):
raise TypeError, 'arg is not a frame or traceback object' raise TypeError, 'arg is not a frame or traceback object'
filename = getsourcefile(frame) filename = getsourcefile(frame)
lineno = getlineno(frame)
if context > 0: if context > 0:
start = frame.f_lineno - 1 - context/2 start = lineno - 1 - context/2
try: try:
lines, lnum = findsource(frame) lines, lnum = findsource(frame)
start = max(start, 1) start = max(start, 1)
start = min(start, len(lines) - context) start = min(start, len(lines) - context)
lines = lines[start:start+context] lines = lines[start:start+context]
index = frame.f_lineno - 1 - start index = lineno - 1 - start
except: except:
lines = index = None lines = index = None
else: else:
lines = index = None lines = index = None
return (filename, frame.f_lineno, frame.f_code.co_name, lines, index) return (filename, lineno, frame.f_code.co_name, lines, index)
def getlineno(frame):
"""Get the line number from a frame object, allowing for optimization."""
# Written by Marc-André Lemburg; revised by Jim Hugunin and Fredrik Lundh.
lineno = frame.f_lineno
code = frame.f_code
if hasattr(code, 'co_lnotab'):
table = code.co_lnotab
lineno = code.co_firstlineno
addr = 0
for i in range(0, len(table), 2):
addr = addr + ord(table[i])
if addr > frame.f_lasti: break
lineno = lineno + ord(table[i+1])
return lineno
def getouterframes(frame, context=1): def getouterframes(frame, context=1):
"""Get a list of records for a frame and all higher (calling) frames. """Get a list of records for a frame and all higher (calling) frames.