diff options
Diffstat (limited to 'Src/pattern.c')
| -rw-r--r-- | Src/pattern.c | 84 |
1 files changed, 50 insertions, 34 deletions
diff --git a/Src/pattern.c b/Src/pattern.c index fa9fefb79..4e2f2369f 100644 --- a/Src/pattern.c +++ b/Src/pattern.c @@ -537,14 +537,9 @@ patcompile(char *exp, int inflags, char **endexp) Upat pscan; char *lng, *strp = NULL; Patprog p; - int savpatflags, savpatglobflags; queue_signals(); - /* In case called from a signal handler before queuing */ - savpatflags = patflags; - savpatglobflags = patglobflags; - startoff = sizeof(struct patprog); /* Ensure alignment of start of program string */ startoff = (startoff + sizeof(union upat) - 1) & ~(sizeof(union upat) - 1); @@ -608,8 +603,6 @@ patcompile(char *exp, int inflags, char **endexp) /* No, do normal compilation. */ strp = NULL; if (patcompswitch(0, &flags) == 0) { - patflags = savpatflags; - patglobflags = savpatglobflags; unqueue_signals(); return NULL; } @@ -745,8 +738,6 @@ patcompile(char *exp, int inflags, char **endexp) if (endexp) *endexp = patparse; - patflags = savpatflags; - patglobflags = savpatglobflags; unqueue_signals(); return p; } @@ -1847,7 +1838,8 @@ pattail(long p, long val) /* do pattail, but on operand of first argument; nop if operandless */ /**/ -static void patoptail(long p, long val) +static void +patoptail(long p, long val) { Upat ptr = (Upat)patout + p; int op = P_OP(ptr); @@ -1863,19 +1855,34 @@ static void patoptail(long p, long val) /* * Run a pattern. */ -static char *patinstart; /* Start of input string */ -static char *patinend; /* End of input string */ -static char *patinput; /* String input pointer */ -static char *patinpath; /* Full path for use with ~ exclusions */ -static int patinlen; /* Length of last successful match. +struct rpat { + char *patinstart; /* Start of input string */ + char *patinend; /* End of input string */ + char *patinput; /* String input pointer */ + char *patinpath; /* Full path for use with ~ exclusions */ + int patinlen; /* Length of last successful match. * Includes count of Meta characters. */ -static char *patbeginp[NSUBEXP]; /* Pointer to backref beginnings */ -static char *patendp[NSUBEXP]; /* Pointer to backref ends */ -static int parsfound; /* parentheses (with backrefs) found */ + char *patbeginp[NSUBEXP]; /* Pointer to backref beginnings */ + char *patendp[NSUBEXP]; /* Pointer to backref ends */ + int parsfound; /* parentheses (with backrefs) found */ + + int globdots; /* Glob initial dots? */ +}; + +static struct rpat pattrystate; + +#define patinstart (pattrystate.patinstart) +#define patinend (pattrystate.patinend) +#define patinput (pattrystate.patinput) +#define patinpath (pattrystate.patinpath) +#define patinlen (pattrystate.patinlen) +#define patbeginp (pattrystate.patbeginp) +#define patendp (pattrystate.patendp) +#define parsfound (pattrystate.parsfound) +#define globdots (pattrystate.globdots) -static int globdots; /* Glob initial dots? */ /* * Character functions operating on unmetafied strings. @@ -2268,9 +2275,6 @@ pattryrefs(Patprog prog, char *string, int stringlen, int unmetalenin, char *progstr = (char *)prog + prog->startoff; struct patstralloc patstralloc_struct; - /* In case called from a signal handler */ - int savpatflags = patflags, savpatglobflags = patglobflags; - if (nump) { maxnpos = *nump; *nump = 0; @@ -2417,8 +2421,6 @@ pattryrefs(Patprog prog, char *string, int stringlen, int unmetalenin, } } } else { - int q = queue_signal_level(); - /* * Test for a `must match' string, unless we're scanning for a match * in which case we don't need to do this each time. @@ -2450,11 +2452,8 @@ pattryrefs(Patprog prog, char *string, int stringlen, int unmetalenin, ret = 0; } } - if (!ret) { - patflags = savpatflags; - patglobflags = savpatglobflags; + if (!ret) return 0; - } patglobflags = prog->globflags; if (!(patflags & PAT_FILE)) { @@ -2466,8 +2465,6 @@ pattryrefs(Patprog prog, char *string, int stringlen, int unmetalenin, patinput = patinstart; - dont_queue_signals(); - if (patmatch((Upat)progstr)) { /* * we were lazy and didn't save the globflags if an exclusion @@ -2606,12 +2603,8 @@ pattryrefs(Patprog prog, char *string, int stringlen, int unmetalenin, ret = 1; } else ret = 0; - - restore_queue_signals(q); } - patflags = savpatflags; - patglobflags = savpatglobflags; return ret; } @@ -2688,6 +2681,26 @@ patmatch(Upat prog) int savglobflags, op, no, min, fail = 0, saverrsfound; zrange_t from, to, comp; patint_t nextch; + int q = queue_signal_level(); + + /* + * To avoid overhead of saving state if there are no queued signals + * waiting, we pierce the signals.h veil and examine queue state. + */ +#define check_for_signals() do if (queue_front != queue_rear) { \ + int savpatflags = patflags, savpatglobflags = patglobflags; \ + char *savexactpos = exactpos, *savexactend = exactend; \ + struct rpat savpattrystate = pattrystate; \ + dont_queue_signals(); \ + restore_queue_signals(q); \ + exactpos = savexactpos; \ + exactend = savexactend; \ + patflags = savpatflags; \ + patglobflags = savpatglobflags; \ + pattrystate = savpattrystate; \ + } while (0) + + check_for_signals(); while (scan && !errflag) { next = PATNEXT(scan); @@ -3522,6 +3535,9 @@ patmatch(Upat prog) } scan = next; + + /* Allow handlers to run once per loop */ + check_for_signals(); } return 0; |