/**
* non-declaration statement
*/
do_statement () {
if (amatch ("if", 2)) {
doif ();
lastst = STIF;
} else if (amatch ("while", 5)) {
dowhile ();
lastst = STWHILE;
} else if (amatch ("switch", 6)) {
doswitch ();
lastst = STSWITCH;
} else if (amatch ("do", 2)) {
dodo ();
need_semicolon ();
lastst = STDO;
} else if (amatch ("for", 3)) {
dofor ();
lastst = STFOR;
} else if (amatch ("return", 6)) {
doreturn ();
need_semicolon ();
lastst = STRETURN;
} else if (amatch ("break", 5)) {
dobreak ();
need_semicolon ();
lastst = STBREAK;
} else if (amatch ("continue", 8)) {
docont ();
need_semicolon ();
lastst = STCONT;
} else if (match (";"))
;
else if (amatch ("case", 4)) {
docase ();
lastst = statement (NO);
} else if (amatch ("default", 7)) {
dodefault ();
lastst = statement (NO);
} else if (match ("__asm__")) {
doasm ();
lastst = STASM;
} else if (match("#")) {
kill();
} else if (match ("{"))
do_compound (NO);
else {
expression (YES);
/* if (match (":")) {
dolabel ();
lastst = statement (NO);
} else {
*/ need_semicolon ();
lastst = STEXP;
/* }
*/ }
}
static void
stmt(Node *n)
{
switch(n->t){
case NDECL:
decl(n);
out(".text\n");
break;
case NRETURN:
ereturn(n);
break;
case NIF:
eif(n);
break;
case NWHILE:
ewhile(n);
break;
case NFOR:
efor(n);
break;
case NDOWHILE:
dowhile(n);
break;
case NBLOCK:
block(n);
break;
case NSWITCH:
eswitch(n);
break;
case NGOTO:
outi("jmp %s\n", n->Goto.l);
break;
case NCASE:
out("%s:\n", n->Case.l);
stmt(n->Case.stmt);
break;
case NLABELED:
out("%s:\n", n->Labeled.l);
stmt(n->Labeled.stmt);
break;
case NEXPRSTMT:
if(n->ExprStmt.expr)
expr(n->ExprStmt.expr);
break;
default:
errorf("unimplemented emit stmt %d\n", n->t);
}
}
int stmt() { int c;
if(istoken('{')) {while(istoken('}')==0) stmt();}
else if(istoken(T_IF)) doif();
else if(istoken(T_DO)) dodo();
else if(istoken(T_WHILE)) dowhile();
else if(istoken(T_GOTO)) {prs("\n jmp @@");name1();prs(symbol);expect(';');}
else if(token==T_ASM) {prs("\n"); c=next();
while(c != '\n') { prc(c); c=next(); }; token=getlex(); }
else if(istoken(T_ASMBLOCK)) {prs("\n"); expect('{'); c=next();
while(c!= '}') { prc(c); c=next(); }; token=getlex(); }
else if(istoken(T_EMIT)) doemit();
else if(istoken(';')) { }
else if(istoken(T_RETURN)){if (token!=';') expr();
prs("\n jmp @@retn"); nreturn++; expect(';'); }
else if(thechar==':') {prs("\n@@"); /*Label*/
prs(symbol); prc(':'); expect(T_NAME); expect(':'); }
else {expr(); expect(';'); } }