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- fixed lookahead assertions (#10, #11, #12)

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- untabified sre_constants.py
This commit is contained in:
Fredrik Lundh 2000-06-30 10:41:31 +00:00
parent a4657f736c
commit 43b3b49b5a
6 changed files with 146 additions and 90 deletions
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25
Modules/_sre.c
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@ -20,6 +20,7 @@
* 00-06-28 fl fixed findall (0.9.1)
* 00-06-29 fl fixed split, added more scanner features (0.9.2)
* 00-06-30 fl tuning, fast search (0.9.3)
* 00-06-30 fl added assert (lookahead) primitives (0.9.4)
*
* Copyright (c) 1997-2000 by Secret Labs AB. All rights reserved.
*
@ -30,7 +31,7 @@
#ifndef SRE_RECURSIVE
char copyright[] = " SRE 0.9.3 Copyright (c) 1997-2000 by Secret Labs AB ";
char copyright[] = " SRE 0.9.4 Copyright (c) 1997-2000 by Secret Labs AB ";
#include "Python.h"
@ -576,11 +577,10 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern)
pattern += pattern[0];
break;
#if 0
case SRE_OP_CALL:
/* match subpattern, without backtracking */
case SRE_OP_ASSERT:
/* assert subpattern */
/* args: <skip> <pattern> */
TRACE(("%8d: subpattern\n", PTR(ptr)));
TRACE(("%8d: assert subpattern\n", PTR(ptr)));
state->ptr = ptr;
i = SRE_MATCH(state, pattern + 1);
if (i < 0)
@ -588,9 +588,20 @@ SRE_MATCH(SRE_STATE* state, SRE_CODE* pattern)
if (!i)
goto failure;
pattern += pattern[0];
ptr = state->ptr;
break;
#endif
case SRE_OP_ASSERT_NOT:
/* assert not subpattern */
/* args: <skip> <pattern> */
TRACE(("%8d: assert not subpattern\n", PTR(ptr)));
state->ptr = ptr;
i = SRE_MATCH(state, pattern + 1);
if (i < 0)
return i;
if (i)
goto failure;
pattern += pattern[0];
break;
#if 0
case SRE_OP_MAX_REPEAT_ONE: