svn commit: r368356 - head/lib/libc/regex

[Kyle Evans]

Author: kevans
Date: Sat Dec  5 02:23:11 2020
New Revision: 368356
URL: https://svnweb.freebsd.org/changeset/base/368356

Log:
  libc: regex: factor out ISBOW/ISEOW macros
  
  These will be reused for \b (word boundary, which matches both sides).
  
  No functional change.

Modified:
  head/lib/libc/regex/engine.c

Modified: head/lib/libc/regex/engine.c
==============================================================================
--- head/lib/libc/regex/engine.c        Sat Dec  5 02:21:58 2020        
(r368355)
+++ head/lib/libc/regex/engine.c        Sat Dec  5 02:23:11 2020        
(r368356)
@@ -589,6 +589,17 @@ dissect(struct match *m,
        return(sp);
 }
 
+#define        ISBOW(m, sp)                                    \
+    (sp < m->endp && ISWORD(*sp) &&                    \
+    ((sp == m->beginp && !(m->eflags&REG_NOTBOL)) ||   \
+    (sp > m->offp && !ISWORD(*(sp-1)))))
+#define        ISEOW(m, sp)                                    \
+    (((sp == m->endp && !(m->eflags&REG_NOTEOL)) ||    \
+    (sp < m->endp && *sp == '\n' &&                    \
+    (m->g->cflags&REG_NEWLINE)) ||                     \
+    (sp < m->endp && !ISWORD(*sp)) ) &&                        \
+    (sp > m->beginp && ISWORD(*(sp-1))))               \
+
 /*
  - backref - figure out what matched what, figuring in back references
  == static const char *backref(struct match *m, const char *start, \
@@ -663,19 +674,13 @@ backref(struct match *m,
                                return(NULL);
                        break;
                case OBOW:
-                       if (sp < m->endp && ISWORD(*sp) &&
-                           ((sp == m->beginp && !(m->eflags&REG_NOTBOL)) ||
-                           (sp > m->offp && !ISWORD(*(sp-1)))))
+                       if (ISBOW(m, sp))
                                { /* yes */ }
                        else
                                return(NULL);
                        break;
                case OEOW:
-                       if (( (sp == m->endp && !(m->eflags&REG_NOTEOL)) ||
-                                       (sp < m->endp && *sp == '\n' &&
-                                               (m->g->cflags&REG_NEWLINE)) ||
-                                       (sp < m->endp && !ISWORD(*sp)) ) &&
-                                       (sp > m->beginp && ISWORD(*(sp-1))) )
+                       if (ISEOW(m, sp))
                                { /* yes */ }
                        else
                                return(NULL);
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