1257 prepare_pats(pat_T *pats, int has_re)  in prepare_pats()  argument
1259     pats->head = pats->pat;  in prepare_pats()
1260     pats->headlen = pats->len;  in prepare_pats()
1265 	if (pats->pat[0] == '^')  in prepare_pats()
1266 	    pats->head = pats->pat + 1;  in prepare_pats()
1267 	else if (pats->pat[0] == '\\' && pats->pat[1] == '<')  in prepare_pats()
1268 	    pats->head = pats->pat + 2;  in prepare_pats()
1269 	if (pats->head == pats->pat)  in prepare_pats()
1270 	    pats->headlen = 0;  in prepare_pats()
1272 	    for (pats->headlen = 0; pats->head[pats->headlen] != NUL;  in prepare_pats()
1273 							      ++pats->headlen)  in prepare_pats()
1275 					   pats->head[pats->headlen]) != NULL)  in prepare_pats()
1277 	if (p_tl != 0 && pats->headlen > p_tl)	// adjust for 'taglength'  in prepare_pats()
1278 	    pats->headlen = p_tl;  in prepare_pats()
1282 	pats->regmatch.regprog = vim_regcomp(pats->pat,  in prepare_pats()
1285 	pats->regmatch.regprog = NULL;  in prepare_pats()