diff options
Diffstat (limited to 'sys/cmd/rc/code.c')
| -rw-r--r-- | sys/cmd/rc/code.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sys/cmd/rc/code.c b/sys/cmd/rc/code.c index 0723279..786f284 100644 --- a/sys/cmd/rc/code.c +++ b/sys/cmd/rc/code.c @@ -163,6 +163,43 @@ walk(Tree *node) } node = n; break; + /* control structures */ + case Twhile: + addr1 = interpreter.i; // head of loop + walk(node->child[0]); + if(addr1 == interpreter.i) + fatal("TODO"); + emitf(Xtrue); + addr2 = emiti(0); // goto end of loop + + walk(node->child[1]); + emitf(Xgoto); + emiti(addr1); // goto top of loop + storepc(addr2); + break; + + case Tfor: + emitf(Xmark); + if(node->child[1]){ // for( x in X ) + walk(node->child[1]); + // emitf(Xglob) + }else{ // for(X) + fatal("TODO"); + } + emitf(Xmark); // null initial value for Xlocal + emitf(Xmark); + walk(node->child[0]); + emitf(Xlocal); + + addr1 = emitf(Xfor); + addr2 = emiti(0); + + walk(node->child[2]); + emitf(Xgoto); + emiti(addr1); + storepc(addr2); + emitf(Xunlocal); + break; /* forks */ case '&': |