Added functions for manipulating bit arrays. One day, an optimized

[libucw.git] / lib / regex.c

diff --git a/lib/regex.c b/lib/regex.c
index 2df8fd043027e421c1c2eaaca86ad873656db83d..ce230848facdd0ba7b1709dc311daa23dd66312b 100644 (file)
--- a/lib/regex.c
+++ b/lib/regex.c
@@ -1,17 +1,23 @@
 /*
  *     Sherlock Library -- Regular Expressions
  *
- *     (c) 1997 Martin Mares, <mj@atrey.karlin.mff.cuni.cz>
+ *     (c) 1997 Martin Mares <mj@ucw.cz>
+ *     (c) 2001 Robert Spalek <robert@ucw.cz>
+ *
+ *     This software may be freely distributed and used according to the terms
+ *     of the GNU Lesser General Public License.
  */
 
+#include "lib/lib.h"
+#include "lib/chartype.h"
+
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include <regex.h>
 
-#include "lib/lib.h"
-
 #define INITIAL_MEM 1024               /* Initial space allocated for each pattern */
+#define CHAR_SET_SIZE 256              /* How many characters in the character set.  */
 
 struct regex {
   struct re_pattern_buffer buf;
@@ -20,14 +26,24 @@ struct regex {
 };
 
 regex *
-rx_compile(byte *p)
+rx_compile(byte *p, int icase)
 {
-  regex *r = xmalloc(sizeof(regex));
+  regex *r = xmalloc_zero(sizeof(regex));
   const char *msg;
 
-  bzero(r, sizeof(struct regex));
   r->buf.buffer = xmalloc(INITIAL_MEM);
   r->buf.allocated = INITIAL_MEM;
+  if (icase)
+    {
+      unsigned i;
+      r->buf.translate = xmalloc (CHAR_SET_SIZE);
+      /* Map uppercase characters to corresponding lowercase ones.  */
+      for (i = 0; i < CHAR_SET_SIZE; i++)
+        r->buf.translate[i] = Cupcase(i);
+    }
+  else
+    r->buf.translate = NULL;
+  re_set_syntax(RE_SYNTAX_POSIX_EXTENDED);
   msg = re_compile_pattern(p, strlen(p), &r->buf);
   if (!msg)
     return r;
@@ -37,8 +53,10 @@ rx_compile(byte *p)
 void
 rx_free(regex *r)
 {
-  free(r->buf.buffer);
-  free(r);
+  xfree(r->buf.buffer);
+  if (r->buf.translate)
+    xfree(r->buf.translate);
+  xfree(r);
 }
 
 int