static HRESULT compile_if_statement(compile_ctx_t *ctx, if_statement_t *stat)
{
unsigned cnd_jmp, endif_label = -1;
elseif_decl_t *elseif_decl;
HRESULT hres;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
cnd_jmp = push_instr(ctx, OP_jmp_false);
if(cnd_jmp == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, stat->if_stat);
if(FAILED(hres))
return hres;
if(stat->else_stat || stat->elseifs) {
endif_label = alloc_label(ctx);
if(endif_label == -1)
return E_OUTOFMEMORY;
hres = push_instr_addr(ctx, OP_jmp, endif_label);
if(FAILED(hres))
return hres;
}
for(elseif_decl = stat->elseifs; elseif_decl; elseif_decl = elseif_decl->next) {
instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
hres = compile_expression(ctx, elseif_decl->expr);
if(FAILED(hres))
return hres;
cnd_jmp = push_instr(ctx, OP_jmp_false);
if(cnd_jmp == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, elseif_decl->stat);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, OP_jmp, endif_label);
if(FAILED(hres))
return hres;
}
instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
if(stat->else_stat) {
hres = compile_statement(ctx, stat->else_stat);
if(FAILED(hres))
return hres;
}
if(endif_label != -1)
label_set_addr(ctx, endif_label);
return S_OK;
}
static HRESULT compile_dowhile_statement(compile_ctx_t *ctx, while_statement_t *stat)
{
unsigned start_addr, prev_label;
HRESULT hres;
start_addr = ctx->instr_cnt;
prev_label = ctx->while_end_label;
if((ctx->while_end_label = alloc_label(ctx)) == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, stat->body);
if(FAILED(hres))
return hres;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, stat->stat.type == STAT_DOUNTIL ? OP_jmp_false : OP_jmp_true, start_addr);
if(FAILED(hres))
return hres;
label_set_addr(ctx, ctx->while_end_label);
ctx->while_end_label = prev_label;
return S_OK;
}
static HRESULT compile_exitdo_statement(compile_ctx_t *ctx)
{
statement_ctx_t *iter;
unsigned pop_cnt = 0;
for(iter = ctx->stat_ctx; iter; iter = iter->next) {
pop_cnt += iter->stack_use;
if(iter->while_end_label)
break;
}
if(!iter) {
FIXME("Exit Do outside Do Loop\n");
return E_FAIL;
}
if(pop_cnt) {
HRESULT hres;
hres = push_instr_uint(ctx, OP_pop, pop_cnt);
if(FAILED(hres))
return hres;
}
return push_instr_addr(ctx, OP_jmp, iter->while_end_label);
}
static HRESULT compile_foreach_statement(compile_ctx_t *ctx, foreach_statement_t *stat)
{
statement_ctx_t loop_ctx = {1};
unsigned loop_start;
HRESULT hres;
hres = compile_expression(ctx, stat->group_expr);
if(FAILED(hres))
return hres;
if(!push_instr(ctx, OP_newenum))
return E_OUTOFMEMORY;
loop_start = ctx->instr_cnt;
if(!(loop_ctx.for_end_label = alloc_label(ctx)))
return E_OUTOFMEMORY;
hres = push_instr_uint_bstr(ctx, OP_enumnext, loop_ctx.for_end_label, stat->identifier);
if(FAILED(hres))
return hres;
hres = compile_statement(ctx, &loop_ctx, stat->body);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, OP_jmp, loop_start);
if(FAILED(hres))
return hres;
label_set_addr(ctx, loop_ctx.for_end_label);
return S_OK;
}
static HRESULT compile_dowhile_statement(compile_ctx_t *ctx, while_statement_t *stat)
{
statement_ctx_t loop_ctx = {0};
unsigned start_addr;
vbsop_t jmp_op;
HRESULT hres;
start_addr = ctx->instr_cnt;
if(!(loop_ctx.while_end_label = alloc_label(ctx)))
return E_OUTOFMEMORY;
hres = compile_statement(ctx, &loop_ctx, stat->body);
if(FAILED(hres))
return hres;
if(stat->expr) {
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
jmp_op = stat->stat.type == STAT_DOUNTIL ? OP_jmp_false : OP_jmp_true;
}else {
jmp_op = OP_jmp;
}
hres = push_instr_addr(ctx, jmp_op, start_addr);
if(FAILED(hres))
return hres;
label_set_addr(ctx, loop_ctx.while_end_label);
return S_OK;
}
static HRESULT compile_exitprop_statement(compile_ctx_t *ctx)
{
if(ctx->prop_end_label == -1) {
FIXME("Exit Property outside Property?\n");
return E_FAIL;
}
return push_instr_addr(ctx, OP_jmp, ctx->prop_end_label);
}
static HRESULT compile_exitfunc_statement(compile_ctx_t *ctx)
{
if(ctx->func_end_label == -1) {
FIXME("Exit Function outside Function?\n");
return E_FAIL;
}
return push_instr_addr(ctx, OP_jmp, ctx->func_end_label);
}
static HRESULT compile_exitsub_statement(compile_ctx_t *ctx)
{
if(ctx->sub_end_label == -1) {
FIXME("Exit Sub outside Sub?\n");
return E_FAIL;
}
return push_instr_addr(ctx, OP_jmp, ctx->sub_end_label);
}
static HRESULT compile_exitdo_statement(compile_ctx_t *ctx)
{
if(ctx->while_end_label == -1) {
FIXME("Exit Do outside Do Loop\n");
return E_FAIL;
}
return push_instr_addr(ctx, OP_jmp, ctx->while_end_label);
}
static HRESULT compile_exitfor_statement(compile_ctx_t *ctx)
{
if(!ctx->for_end_label) {
FIXME("Exit For outside For Loop\n");
return E_FAIL;
}
return push_instr_addr(ctx, OP_jmp, ctx->for_end_label);
}
static HRESULT exit_label(compile_ctx_t *ctx, unsigned jmp_label)
{
statement_ctx_t *iter;
unsigned pop_cnt = 0;
for(iter = ctx->stat_ctx; iter; iter = iter->next)
pop_cnt += iter->stack_use;
if(pop_cnt) {
HRESULT hres;
hres = push_instr_uint(ctx, OP_pop, pop_cnt);
if(FAILED(hres))
return hres;
}
return push_instr_addr(ctx, OP_jmp, jmp_label);
}
static HRESULT compile_while_statement(compile_ctx_t *ctx, while_statement_t *stat)
{
statement_ctx_t stat_ctx = {0}, *loop_ctx;
unsigned start_addr;
unsigned jmp_end;
HRESULT hres;
start_addr = ctx->instr_cnt;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
jmp_end = push_instr(ctx, stat->stat.type == STAT_UNTIL ? OP_jmp_true : OP_jmp_false);
if(!jmp_end)
return E_OUTOFMEMORY;
if(stat->stat.type == STAT_WHILE) {
loop_ctx = NULL;
}else {
if(!(stat_ctx.while_end_label = alloc_label(ctx)))
return E_OUTOFMEMORY;
loop_ctx = &stat_ctx;
}
hres = compile_statement(ctx, loop_ctx, stat->body);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, OP_jmp, start_addr);
if(FAILED(hres))
return hres;
instr_ptr(ctx, jmp_end)->arg1.uint = ctx->instr_cnt;
if(loop_ctx)
label_set_addr(ctx, stat_ctx.while_end_label);
return S_OK;
}
static HRESULT compile_while_statement(compile_ctx_t *ctx, while_statement_t *stat)
{
unsigned start_addr, prev_label;
unsigned jmp_end;
HRESULT hres;
start_addr = ctx->instr_cnt;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
jmp_end = push_instr(ctx, stat->stat.type == STAT_UNTIL ? OP_jmp_true : OP_jmp_false);
if(jmp_end == -1)
return E_OUTOFMEMORY;
prev_label = ctx->while_end_label;
if(stat->stat.type != STAT_WHILE && (ctx->while_end_label = alloc_label(ctx)) == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, stat->body);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, OP_jmp, start_addr);
if(FAILED(hres))
return hres;
instr_ptr(ctx, jmp_end)->arg1.uint = ctx->instr_cnt;
if(stat->stat.type != STAT_WHILE) {
label_set_addr(ctx, ctx->while_end_label);
ctx->while_end_label = prev_label;
}
return S_OK;
}
static HRESULT compile_select_statement(compile_ctx_t *ctx, select_statement_t *stat)
{
unsigned end_label, case_cnt = 0, *case_labels = NULL, i;
case_clausule_t *case_iter;
expression_t *expr_iter;
HRESULT hres;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
if(!push_instr(ctx, OP_val))
return E_OUTOFMEMORY;
end_label = alloc_label(ctx);
if(!end_label)
return E_OUTOFMEMORY;
for(case_iter = stat->case_clausules; case_iter; case_iter = case_iter->next)
case_cnt++;
if(case_cnt) {
case_labels = heap_alloc(case_cnt*sizeof(*case_labels));
if(!case_labels)
return E_OUTOFMEMORY;
}
for(case_iter = stat->case_clausules, i=0; case_iter; case_iter = case_iter->next, i++) {
case_labels[i] = alloc_label(ctx);
if(!case_labels[i]) {
hres = E_OUTOFMEMORY;
break;
}
if(!case_iter->expr)
break;
for(expr_iter = case_iter->expr; expr_iter; expr_iter = expr_iter->next) {
hres = compile_expression(ctx, expr_iter);
if(FAILED(hres))
break;
hres = push_instr_addr(ctx, OP_case, case_labels[i]);
if(FAILED(hres))
break;
}
}
if(FAILED(hres)) {
heap_free(case_labels);
return hres;
}
hres = push_instr_uint(ctx, OP_pop, 1);
if(FAILED(hres)) {
heap_free(case_labels);
return hres;
}
hres = push_instr_addr(ctx, OP_jmp, case_iter ? case_labels[i] : end_label);
if(FAILED(hres)) {
heap_free(case_labels);
return hres;
}
for(case_iter = stat->case_clausules, i=0; case_iter; case_iter = case_iter->next, i++) {
label_set_addr(ctx, case_labels[i]);
hres = compile_statement(ctx, NULL, case_iter->stat);
if(FAILED(hres))
break;
if(!case_iter->next)
break;
hres = push_instr_addr(ctx, OP_jmp, end_label);
if(FAILED(hres))
break;
}
heap_free(case_labels);
if(FAILED(hres))
return hres;
label_set_addr(ctx, end_label);
return S_OK;
}
static HRESULT compile_forto_statement(compile_ctx_t *ctx, forto_statement_t *stat)
{
statement_ctx_t loop_ctx = {2};
unsigned step_instr, instr;
BSTR identifier;
HRESULT hres;
identifier = alloc_bstr_arg(ctx, stat->identifier);
if(!identifier)
return E_OUTOFMEMORY;
hres = compile_expression(ctx, stat->from_expr);
if(FAILED(hres))
return hres;
instr = push_instr(ctx, OP_assign_ident);
if(!instr)
return E_OUTOFMEMORY;
instr_ptr(ctx, instr)->arg1.bstr = identifier;
instr_ptr(ctx, instr)->arg2.uint = 0;
hres = compile_expression(ctx, stat->to_expr);
if(FAILED(hres))
return hres;
if(!push_instr(ctx, OP_val))
return E_OUTOFMEMORY;
if(stat->step_expr) {
hres = compile_expression(ctx, stat->step_expr);
if(FAILED(hres))
return hres;
if(!push_instr(ctx, OP_val))
return E_OUTOFMEMORY;
}else {
hres = push_instr_int(ctx, OP_short, 1);
if(FAILED(hres))
return hres;
}
loop_ctx.for_end_label = alloc_label(ctx);
if(!loop_ctx.for_end_label)
return E_OUTOFMEMORY;
step_instr = push_instr(ctx, OP_step);
if(!step_instr)
return E_OUTOFMEMORY;
instr_ptr(ctx, step_instr)->arg2.bstr = identifier;
instr_ptr(ctx, step_instr)->arg1.uint = loop_ctx.for_end_label;
hres = compile_statement(ctx, &loop_ctx, stat->body);
if(FAILED(hres))
return hres;
instr = push_instr(ctx, OP_incc);
if(!instr)
return E_OUTOFMEMORY;
instr_ptr(ctx, instr)->arg1.bstr = identifier;
hres = push_instr_addr(ctx, OP_jmp, step_instr);
if(FAILED(hres))
return hres;
hres = push_instr_uint(ctx, OP_pop, 2);
if(FAILED(hres))
return hres;
label_set_addr(ctx, loop_ctx.for_end_label);
return S_OK;
}