diff options
Diffstat (limited to 'abs/core/grep/10-dfa-optional.patch')
| -rw-r--r-- | abs/core/grep/10-dfa-optional.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/abs/core/grep/10-dfa-optional.patch b/abs/core/grep/10-dfa-optional.patch new file mode 100644 index 0000000..784eba9 --- /dev/null +++ b/abs/core/grep/10-dfa-optional.patch @@ -0,0 +1,67 @@ +--- grep-2.5.1a/src/search.c.dfa-optional 2005-01-07 14:58:45.714869815 +0000 ++++ grep-2.5.1a/src/search.c 2005-01-07 14:58:45.725867716 +0000 +@@ -327,12 +327,34 @@ + int backref, start, len; + struct kwsmatch kwsm; + size_t i, ret_val; ++ static int use_dfa; ++ static int use_dfa_checked = 0; + #ifdef MBS_SUPPORT + int mb_cur_max = MB_CUR_MAX; + mbstate_t mbs; + memset (&mbs, '\0', sizeof (mbstate_t)); + #endif /* MBS_SUPPORT */ + ++ if (!use_dfa_checked) ++ { ++ char *grep_use_dfa = getenv ("GREP_USE_DFA"); ++ if (!grep_use_dfa) ++ { ++#ifdef MBS_SUPPORT ++ /* Turn off DFA when processing multibyte input. */ ++ use_dfa = (MB_CUR_MAX == 1); ++#else ++ use_dfa = 1; ++#endif /* MBS_SUPPORT */ ++ } ++ else ++ { ++ use_dfa = atoi (grep_use_dfa); ++ } ++ ++ use_dfa_checked = 1; ++ } ++ + buflim = buf + size; + + for (beg = end = buf; end < buflim; beg = end) +@@ -400,7 +422,8 @@ + #endif /* MBS_SUPPORT */ + (kwsm.index < kwset_exact_matches)) + goto success_in_beg_and_end; +- if (dfaexec (&dfa, beg, end - beg, &backref) == (size_t) -1) ++ if (use_dfa && ++ dfaexec (&dfa, beg, end - beg, &backref) == (size_t) -1) + continue; + } + else +@@ -409,7 +432,9 @@ + #ifdef MBS_SUPPORT + size_t bytes_left = 0; + #endif /* MBS_SUPPORT */ +- size_t offset = dfaexec (&dfa, beg, buflim - beg, &backref); ++ size_t offset = 0; ++ if (use_dfa) ++ offset = dfaexec (&dfa, beg, buflim - beg, &backref); + if (offset == (size_t) -1) + break; + /* Narrow down to the line we've found. */ +@@ -451,7 +476,7 @@ + --beg; + } + /* Successful, no backreferences encountered! */ +- if (!backref) ++ if (use_dfa && !backref) + goto success_in_beg_and_end; + } + else |