pcre.c, etc.: Support the PCRE2 library.

[anag] / pcre.c

diff --git a/pcre.c b/pcre.c
index 5c5994c..b30fc9b 100644 (file)
--- a/pcre.c
+++ b/pcre.c
@@ -28,17 +28,30 @@
 
 #include "anag.h"
 
-#include <pcre.h>
+#ifdef HAVE_PCRE2
+#  define PCRE2_CODE_UNIT_WIDTH 8
+#  include <pcre2.h>
+#endif
+
+#ifdef HAVE_PCRE
+#  include <pcre.h>
+#endif
 
 /*----- Data structures ---------------------------------------------------*/
 
 typedef struct node_pcre {
   node n;
   const char *s;
+#ifdef HAVE_PCRE2
+  pcre2_code *rx;
+  pcre2_match_data *m;
+#endif
+#ifdef HAVE_PCRE
   pcre *rx;
   pcre_extra *rx_study;
   int *ovec;
   int ovecsz;
+#endif
 } node_pcre;
 
 /*----- Main code ---------------------------------------------------------*/
@@ -48,12 +61,30 @@ typedef struct node_pcre {
 static int n_pcre(node *nn, const char *p, size_t sz)
 {
   node_pcre *n = (node_pcre *)nn;
+#ifdef HAVE_PCRE2
+  char buf[128];
+  int rc;
+#endif
+#ifdef HAVE_PCRE
   int e;
-
+#endif
+
+#ifdef HAVE_PCRE2
+  rc = pcre2_match(n->rx, (PCRE2_SPTR)p, sz, 0, 0, n->m, 0);
+  if (rc >= 0) return (1);
+  else switch (rc) {
+    case PCRE2_ERROR_NOMATCH: return (0);
+    default:
+      rc = pcre2_get_error_message(rc, (PCRE2_UCHAR *)buf, sizeof(buf));
+      assert(!rc); die("pcre2 matching failed': %s", buf);
+  }
+#endif
+#ifdef HAVE_PCRE
   e = pcre_exec(n->rx, n->rx_study, p, sz, 0, 0, n->ovec, n->ovecsz);
   if (e >= 0) return (1);
   if (e == PCRE_ERROR_NOMATCH) return (0);
   die("unexpected PCRE error code %d", e);
+#endif
 }
 
 /* --- Node creation --- */
@@ -61,12 +92,37 @@ static int n_pcre(node *nn, const char *p, size_t sz)
 node *pcrenode(const char *const *av)
 {
   node_pcre *n = xmalloc(sizeof(*n));
+#ifdef HAVE_PCRE2
+  char buf[128];
+  int err;
+  PCRE2_SIZE eo;
+  uint32_t c;
+#endif
+#ifdef HAVE_PCRE
   const char *e;
   int eo;
   int c;
+#endif
 
   n->n.func = n_pcre;
 
+#ifdef HAVE_PCRE2
+  n->rx = pcre2_compile((PCRE2_SPTR)av[0], strlen(av[0]), PCRE2_CASELESS,
+                       &err, &eo, 0);
+  if (!n->rx) {
+    err = pcre2_get_error_message(err, (PCRE2_UCHAR *)buf, sizeof(buf));
+    assert(!err); die("bad regular expression `%s': %s", av[0], buf);
+  }
+  err = pcre2_pattern_info(n->rx, PCRE2_INFO_BACKREFMAX, &c);
+  assert(!err);
+  n->m = pcre2_match_data_create_from_pattern(n->rx, 0);
+  if (!n->m) {
+    err = pcre2_get_error_message(err, (PCRE2_UCHAR *)buf, sizeof(buf));
+    assert(!err); die("failed to allocate match data: %s", buf);
+  }
+  pcre2_jit_compile(n->rx, PCRE2_JIT_COMPLETE);
+#endif
+#ifdef HAVE_PCRE
   n->rx = pcre_compile(av[0], PCRE_CASELESS, &e, &eo, 0);
   if (!n->rx) die("bad regular expression `%s': %s", av[0], e);
   n->rx_study = pcre_study(n->rx, 0, &e);
@@ -74,6 +130,7 @@ node *pcrenode(const char *const *av)
   pcre_fullinfo(n->rx, n->rx_study, PCRE_INFO_CAPTURECOUNT, &c);
   n->ovecsz = 2*c;
   n->ovec = xmalloc(n->ovecsz*sizeof(*n->ovec));
+#endif
 
   return (&n->n);
 }