//static int factor(void)
int factor(void)
{
int r;
switch(tokenizer_token()) {
case TOKENIZER_NUMBER:
r = tokenizer_num();
accept(TOKENIZER_NUMBER);
break;
case TOKENIZER_LEFTPAREN:
accept(TOKENIZER_LEFTPAREN);
r = expr();
accept(TOKENIZER_RIGHTPAREN);
break;
default:
r = varfactor();
break;
}
return r;
}
/*---------------------------------------------------------------------------*/
static int
factor(void)
{
int r;
DEBUG_PRINTF("factor: token %d\n", tokenizer_token());
switch(tokenizer_token()) {
case TOKENIZER_NUMBER:
r = tokenizer_num();
DEBUG_PRINTF("factor: number %d\n", r);
accept(TOKENIZER_NUMBER);
break;
case TOKENIZER_LEFTPAREN:
accept(TOKENIZER_LEFTPAREN);
r = expr();
accept(TOKENIZER_RIGHTPAREN);
break;
default:
r = varfactor();
break;
}
return r;
}
/*---------------------------------------------------------------------------*/
static void factor(struct typevalue *v)
{
uint8_t t = current_token;
int len;
struct typevalue arg[3];
DEBUG_PRINTF("factor: token %d\n", current_token);
switch(t) {
case TOKENIZER_STRING:
v->type = TYPE_STRING;
len = tokenizer_string_len();
v->d.p = string_temp(len);
memcpy(v->d.p + 1, tokenizer_string(), len);
DEBUG_PRINTF("factor: string %p\n", v->d.p);
accept_tok(TOKENIZER_STRING);
break;
case TOKENIZER_NUMBER:
v->d.i = tokenizer_num();
v->type = TYPE_INTEGER;
DEBUG_PRINTF("factor: number %d\n", v->d.i);
accept_tok(TOKENIZER_NUMBER);
break;
case TOKENIZER_LEFTPAREN:
accept_tok(TOKENIZER_LEFTPAREN);
expr(v);
accept_tok(TOKENIZER_RIGHTPAREN);
break;
case TOKENIZER_INTVAR:
case TOKENIZER_STRINGVAR:
varfactor(v);
break;
default:
if (TOKENIZER_NUMEXP(t)) {
accept_tok(t);
switch(t) {
case TOKENIZER_PEEK:
funcexpr(arg,"I");
v->d.i = peek_function(arg[0].d.i);
break;
case TOKENIZER_ABS:
funcexpr(arg,"I");
v->d.i = arg[0].d.i;
if (v->d.i < 0)
v->d.i = -v->d.i;
break;
case TOKENIZER_INT:
funcexpr(arg,"I");
v->d.i = arg[0].d.i;
break;
case TOKENIZER_SGN:
funcexpr(arg,"I");
v->d.i = arg[0].d.i;
if (v->d.i > 1 ) v->d.i = 1;
if (v->d.i < 0) v->d.i = -1;
break;
case TOKENIZER_LEN:
funcexpr(arg,"S");
v->d.i = *arg[0].d.p;
break;
case TOKENIZER_CODE:
funcexpr(arg,"S");
if (*arg[0].d.p)
v->d.i = arg[0].d.p[1];
else
v->d.i = 0;
break;
case TOKENIZER_VAL:
funcexpr(arg,"S");
v->d.i = string_val(&arg[0]);
break;
default:
syntax_error();
}
v->type = TYPE_INTEGER;
}
else if (TOKENIZER_STRINGEXP(t)) {
accept_tok(t);
switch(t) {
case TOKENIZER_LEFTSTR:
funcexpr(arg, "SI");
string_cut(v, &arg[0], 1, arg[1].d.i);
break;
case TOKENIZER_RIGHTSTR:
funcexpr(arg, "SI");
string_cut_r(v, &arg[0], arg[1].d.i);
break;
case TOKENIZER_MIDSTR:
funcexpr(arg, "SII");
string_cut(v, &arg[0], arg[1].d.i, arg[2].d.i);
break;
case TOKENIZER_CHRSTR:
funcexpr(arg, "I");
v->d.p = string_temp(2);
v->d.p[1] = arg[0].d.i;
v->type = TYPE_STRING;
break;
default:
syntax_error();
}
}
else
syntax_error();
}
}