From e5fc4ed9fb277d92ee24cd8e1bf5e305eb8e18f4 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Thu, 3 May 2018 22:53:01 +0100
Subject: implemented REGEXP match on addresses

---
 buff.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

(limited to 'buff.c')

diff --git a/buff.c b/buff.c
index 89ca82f..aa66a67 100644
--- a/buff.c
+++ b/buff.c
@@ -1,4 +1,5 @@
 #include "buff.h"
+#include <regex.h>
 
 line_t* __search_pos(int addr){
   
@@ -108,6 +109,8 @@ void print_lines(char lineno){
 
 int move_to_line(int addr, char print){
 
+  fprintf(stderr, " >>>> move_to_line: addr: %d pos: %d\n", addr, pos);
+  
   if (addr > num)
     return -1;
   else if (addr >= 0){
@@ -307,3 +310,59 @@ int write_lines(){
   printf("%d\n", tot);
   return 0;
 }
+
+/* match either forward (bw=0) or backward (bw=1)*/
+int match(char **c, char bw){
+  
+  char sep = **c, *tmp;
+  line_t *ptr;
+  regex_t re;
+  int l;
+
+  if (bw)
+    tmp = strtok(*c, "?\n");
+  else
+    tmp = strtok(*c, "/\n");
+  fprintf(stderr, "  >>>> string to match: \"%s\" bw: %d\n", tmp, bw);
+  if (!tmp)
+    return -1;
+
+  if (regcomp(&re, tmp, REG_EXTENDED)){
+    return -1;
+  }
+  *c += strlen(tmp);
+  l = pos;
+  ptr = cur;
+  do {
+    fprintf(stderr, ".");
+    if (bw){
+      ptr = ptr->prev;
+      l = (l-1 + num) % num;
+      if (!ptr){
+        /* FIXME: if we keep b_end updated we can avoid this search */
+        ptr = __search_pos(num);
+        l = num;
+      }
+    }
+    else{
+      ptr = ptr->next;
+      l = (l+1) % num;
+      if (! ptr){
+        ptr = b_start;
+        l = 1;
+      }
+    }
+    if (!l) l = num;
+    if (!regexec(&re, (char *) ptr->c , (size_t) 0, NULL, 0)){
+      regfree(&re);
+      return l;
+    }
+    fprintf(stderr, "     %d\n", l);
+  } while(l != pos);
+  fprintf(stderr, "    >>>> match: returning\n");
+  regfree(&re);
+  return -1;
+}
+
+
+
-- 
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