1 #include	"mk.h"
2 
3 static Rule *lr, *lmr;
4 static int rcmp(Rule *r, char *target, Word *tail);
5 static int nrules = 0;
6 
7 void
8 addrule(char *head, Word *tail, char *body, Word *ahead, int attr, int hline, char *prog)
9 {
10 	Rule *r;
11 	Rule *rr;
12 	Symtab *sym;
13 	int reuse;
14 
15 	r = 0;
16 	reuse = 0;
17 	if(sym = symlook(head, S_TARGET, 0)){
18 		for(r = sym->u.ptr; r; r = r->chain)
19 			if(rcmp(r, head, tail) == 0){
20 				reuse = 1;
21 				break;
22 			}
23 	}
24 	if(r == 0)
25 		r = (Rule *)Malloc(sizeof(Rule));
26 	r->shellt = shellt;
27 	r->shellcmd = shellcmd;
28 	r->target = head;
29 	r->tail = tail;
30 	r->recipe = body;
31 	r->line = hline;
32 	r->file = infile;
33 	r->attr = attr;
34 	r->alltargets = ahead;
35 	r->prog = prog;
36 	r->rule = nrules++;
37 	if(!reuse){
38 		rr = symlook(head, S_TARGET, (void *)r)->u.ptr;
39 		if(rr != r){
40 			r->chain = rr->chain;
41 			rr->chain = r;
42 		} else
43 			r->chain = 0;
44 	}
45 	if(!reuse)
46 		r->next = 0;
47 	if((attr&REGEXP) || shellt->charin(head, "%&")){
48 		r->attr |= META;
49 		if(reuse)
50 			return;
51 		if(attr&REGEXP){
52 			patrule = r;
53 			r->pat = regcomp(head);
54 		}
55 		if(metarules == 0)
56 			metarules = lmr = r;
57 		else {
58 			lmr->next = r;
59 			lmr = r;
60 		}
61 	} else {
62 		if(reuse)
63 			return;
64 		r->pat = 0;
65 		if(rules == 0)
66 			rules = lr = r;
67 		else {
68 			lr->next = r;
69 			lr = r;
70 		}
71 	}
72 }
73 
74 void
75 dumpr(char *s, Rule *r)
76 {
77 	if(r == nil)
78 		return;
79 	Bprint(&bout, "%s: start=%ld shelltype=%s shellcmd=%s\n", 
80 		s, r, r->shellt->name, wtos(r->shellcmd, ' '));
81 	for(; r; r = r->next){
82 		Bprint(&bout, "\tRule %ld: %s[%d] attr=%x next=%ld chain=%ld alltarget='%s'",
83 			r, r->file, r->line, r->attr, r->next, r->chain, wtos(r->alltargets, ' '));
84 		if(r->prog)
85 			Bprint(&bout, " prog='%s'", r->prog);
86 		Bprint(&bout, "\n\ttarget=%s: %s\n", r->target, wtos(r->tail, ' '));
87 		Bprint(&bout, "\trecipe@%ld='%s'\n", r->recipe, r->recipe);
88 	}
89 }
90 
91 static int
92 rcmp(Rule *r, char *target, Word *tail)
93 {
94 	Word *w;
95 
96 	if(strcmp(r->target, target))
97 		return 1;
98 	for(w = r->tail; w && tail; w = w->next, tail = tail->next)
99 		if(strcmp(w->s, tail->s))
100 			return 1;
101 	return(w || tail);
102 }
103 
104 char *
105 rulecnt(void)
106 {
107 	char *s;
108 
109 	s = Malloc(nrules);
110 	memset(s, 0, nrules);
111 	return(s);
112 }