ref: 12fa017f3fc2687d3afb166fd30d9b134abb1da5
dir: /sys/src/cmd/mk/rule.c/
#include "mk.h" static Rule *lr, *lmr; static rcmp(Rule *r, char *target, Word *tail); static int nrules = 0; void addrule(char *head, Word *tail, char *body, Word *ahead, int attr, int hline, char *prog) { Rule *r; Rule *rr; Symtab *sym; int reuse; r = 0; reuse = 0; if(sym = symlook(head, S_TARGET, 0)){ for(r = sym->u.ptr; r; r = r->chain) if(rcmp(r, head, tail) == 0){ reuse = 1; break; } } if(r == 0) r = (Rule *)Malloc(sizeof(Rule)); r->target = head; r->tail = tail; r->recipe = body; r->line = hline; r->file = infile; r->attr = attr; r->alltargets = ahead; r->prog = prog; r->rule = nrules++; if(!reuse){ rr = symlook(head, S_TARGET, r)->u.ptr; if(rr != r){ r->chain = rr->chain; rr->chain = r; } else r->chain = 0; } if(!reuse) r->next = 0; if((attr®EXP) || charin(head, "%&")){ r->attr |= META; if(reuse) return; if(attr®EXP){ patrule = r; r->pat = regcomp(head); } if(metarules == 0) metarules = lmr = r; else { lmr->next = r; lmr = r; } } else { if(reuse) return; r->pat = 0; if(rules == 0) rules = lr = r; else { lr->next = r; lr = r; } } } void dumpr(char *s, Rule *r) { Bprint(&bout, "%s: start=%p\n", s, r); for(; r; r = r->next){ Bprint(&bout, "\tRule %p: %s:%d attr=%x next=%p chain=%p alltarget='%s'", r, r->file, r->line, r->attr, r->next, r->chain, wtos(r->alltargets, ' ')); if(r->prog) Bprint(&bout, " prog='%s'", r->prog); Bprint(&bout, "\n\ttarget=%s: %s\n", r->target, wtos(r->tail,' ')); Bprint(&bout, "\trecipe@%p='%s'\n", r->recipe, r->recipe); } } static int rcmp(Rule *r, char *target, Word *tail) { Word *w; if(strcmp(r->target, target)) return 1; for(w = r->tail; w && tail; w = w->next, tail = tail->next) if(strcmp(w->s, tail->s)) return 1; return(w || tail); } char * rulecnt(void) { char *s; s = Malloc(nrules); memset(s, 0, nrules); return(s); }