1 struct re_pattern_buffer {
2     unsigned char *buffer;
3     unsigned long int allocated;
4 };
byte_regex_compile(struct re_pattern_buffer * bufp,unsigned char * begalt,unsigned char * b)5 void byte_regex_compile (struct re_pattern_buffer *bufp,
6 			 unsigned char *begalt, unsigned char *b)
7 {
8   unsigned char *pfrom;
9   unsigned char *pto;
10 
11   while ((unsigned long) (b - bufp->buffer + 3) > bufp->allocated)
12     {
13       unsigned char *old_buffer = bufp->buffer;
14       bufp->allocated <<= 1;
15       if (old_buffer != bufp->buffer)
16 	{
17 	  int incr = bufp->buffer - old_buffer;
18 	  b += incr;
19 	}
20     }
21   pfrom = b;
22   pto = b + 3;
23   while (pfrom != begalt)
24     *--pto = *--pfrom;
25 }
26 
27