rule.c - 9base - revived minimalist port of Plan 9 userland to Unix
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rule.c (2110B)
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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®EXP) || shellt->charin(head, "%&")){
48 r->attr |= META;
49 if(reuse)
50 return;
51 if(attr®EXP){
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 }