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#include "builtins.h"
#include "interp.h"
#include "sexp.h"
SExpRef builtin_list(Interp *interp, SExpRef args) {
return args;
}
SExpRef builtin_car(Interp *interp, SExpRef args) {
if (lisp_length(interp, args) != 1) {
return new_error(interp, "car: wrong argument number.\n");
}
if (ERRORP(args)) return args;
return CAR(CAR(args));
}
SExpRef builtin_cdr(Interp *interp, SExpRef args) {
if (lisp_length(interp, args) != 1) {
return new_error(interp, "cdr: wrong argument number.\n");
}
return CDR(CAR(args));
}
SExpRef builtin_cons(Interp *interp, SExpRef args) {
if (lisp_length(interp, args) != 2) {
return new_error(interp, "cons: wrong argument number.\n");
}
return CONS(CAR(args), CADR(args));
}
static SExp raw_add(SExp a, SExp b) {
if (a.type == kRealSExp || b.type == kRealSExp) {
double result = 0;
if (a.type == kRealSExp) result += a.real;
else result += a.integer;
if (b.type == kRealSExp) result += b.real;
else result += b.integer;
return (SExp){ .type = kRealSExp, .real = result };
} else {
int64_t result;
return (SExp){ .type = kIntegerSExp, .integer= a.integer + b.integer};
}
}
static SExp raw_sub(SExp a, SExp b) {
if (a.type == kRealSExp || b.type == kRealSExp) {
double result = 0;
if (a.type == kRealSExp) result += a.real;
else result += a.integer;
if (b.type == kRealSExp) result -= b.real;
else result -= b.integer;
return (SExp){ .type = kRealSExp, .real = result };
} else {
int64_t result;
return (SExp){ .type = kIntegerSExp, .real = a.integer - b.integer};
}
}
SExpRef builtin_add(Interp *interp, SExpRef args) {
SExpRef ret;
SExp acc = {.type = kIntegerSExp, .integer = 0};
SExpRef cur = args;
while (!NILP(cur)) {
if (REF(CAR(cur))->type != kIntegerSExp && REF(CAR(cur))->type != kRealSExp) {
return new_error(interp, "+: wrong argument type.\n");
}
cur = CDR(cur);
}
cur = args;
while (!NILP(cur)) {
acc = raw_add(acc, *REF(CAR(cur)));
cur = CDR(cur);
}
ret = new_sexp(interp);
*REF(ret) = acc;
return ret;
}
SExpRef builtin_sub(Interp *interp, SExpRef args) {
SExpRef ret;
SExpRef cur = args;
while (!NILP(cur)) {
if (REF(CAR(cur))->type != kIntegerSExp && REF(CAR(cur))->type != kRealSExp) {
return new_error(interp, "-: wrong argument type.\n");
}
cur = CDR(cur);
}
int args_len = lisp_length(interp, args);
if (args_len == 1) {
SExp num = *REF(CAR(args));
if (num.type == kIntegerSExp) {
return new_integer(interp, -num.integer);
}
return new_real(interp, -num.real);
}
if (args_len == 2) {
SExp num = raw_sub(*REF(CAR(args)), *REF(CADR(args)));
ret = new_sexp(interp);
*REF(ret) = num;
return ret;
}
return new_error(interp, "-: wrong argument number.\n");
}
SExpRef builtin_num_equal(Interp *interp, SExpRef args) {
int args_len = lisp_length(interp, args);
if (args_len != 2) return new_error(interp, "=: wrong argument number.\n");
SExpRef lhs = CAR(args);
SExpRef rhs = CADR(args);
if (VALTYPE(lhs) != kRealSExp && VALTYPE(lhs) != kIntegerSExp) {
return new_error(interp, "=: type error.\n");
}
if (VALTYPE(rhs) != kRealSExp && VALTYPE(rhs) != kIntegerSExp) {
return new_error(interp, "=: type error.\n");
}
if (VALTYPE(lhs) == kRealSExp || VALTYPE(rhs) == kRealSExp) {
double flhs, frhs;
if (VALTYPE(lhs) == kIntegerSExp) {
flhs = REF(lhs)->integer;
} else {
flhs = REF(lhs)->real;
}
if (VALTYPE(rhs) == kIntegerSExp) {
frhs = REF(rhs)->integer;
} else {
frhs = REF(rhs)->real;
}
return new_boolean(interp, flhs == frhs);
} else {
return new_boolean(interp, REF(lhs)->integer == REF(rhs)->integer);
}
}
SExpRef builtin_gt(Interp *interp, SExpRef args) {
int args_len = lisp_length(interp, args);
if (args_len != 2) return new_error(interp, ">: wrong argument number.\n");
SExpRef lhs = CAR(args);
SExpRef rhs = CADR(args);
if (VALTYPE(lhs) != kRealSExp && VALTYPE(lhs) != kIntegerSExp) {
return new_error(interp, ">: type error.\n");
}
if (VALTYPE(rhs) != kRealSExp && VALTYPE(rhs) != kIntegerSExp) {
return new_error(interp, ">: type error.\n");
}
if (VALTYPE(lhs) == kRealSExp || VALTYPE(rhs) == kRealSExp) {
double flhs, frhs;
if (VALTYPE(lhs) == kIntegerSExp) {
flhs = REF(lhs)->integer;
} else {
flhs = REF(lhs)->real;
}
if (VALTYPE(rhs) == kIntegerSExp) {
frhs = REF(rhs)->integer;
} else {
frhs = REF(rhs)->real;
}
return new_boolean(interp, flhs > frhs);
} else {
return new_boolean(interp, REF(lhs)->integer > REF(rhs)->integer);
}
}
SExpRef builtin_lt(Interp *interp, SExpRef args) {
int args_len = lisp_length(interp, args);
if (args_len != 2) return new_error(interp, "<: wrong argument number.\n");
SExpRef lhs = CAR(args);
SExpRef rhs = CADR(args);
if (VALTYPE(lhs) != kRealSExp && VALTYPE(lhs) != kIntegerSExp) {
return new_error(interp, "<: type error.\n");
}
if (VALTYPE(rhs) != kRealSExp && VALTYPE(rhs) != kIntegerSExp) {
return new_error(interp, "<: type error.\n");
}
if (VALTYPE(lhs) == kRealSExp || VALTYPE(rhs) == kRealSExp) {
double flhs, frhs;
if (VALTYPE(lhs) == kIntegerSExp) {
flhs = REF(lhs)->integer;
} else {
flhs = REF(lhs)->real;
}
if (VALTYPE(rhs) == kIntegerSExp) {
frhs = REF(rhs)->integer;
} else {
frhs = REF(rhs)->real;
}
return new_boolean(interp, flhs < frhs);
} else {
return new_boolean(interp, REF(lhs)->integer < REF(rhs)->integer);
}
}
SExpRef builtin_ge(Interp *interp, SExpRef args) {
int args_len = lisp_length(interp, args);
if (args_len != 2) return new_error(interp, ">=: wrong argument number.\n");
SExpRef lhs = CAR(args);
SExpRef rhs = CADR(args);
if (VALTYPE(lhs) != kRealSExp && VALTYPE(lhs) != kIntegerSExp) {
return new_error(interp, ">=: type error.\n");
}
if (VALTYPE(rhs) != kRealSExp && VALTYPE(rhs) != kIntegerSExp) {
return new_error(interp, ">=: type error.\n");
}
if (VALTYPE(lhs) == kRealSExp || VALTYPE(rhs) == kRealSExp) {
double flhs, frhs;
if (VALTYPE(lhs) == kIntegerSExp) {
flhs = REF(lhs)->integer;
} else {
flhs = REF(lhs)->real;
}
if (VALTYPE(rhs) == kIntegerSExp) {
frhs = REF(rhs)->integer;
} else {
frhs = REF(rhs)->real;
}
return new_boolean(interp, flhs >= frhs);
} else {
return new_boolean(interp, REF(lhs)->integer >= REF(rhs)->integer);
}
}
SExpRef builtin_le(Interp *interp, SExpRef args) {
int args_len = lisp_length(interp, args);
if (args_len != 2) return new_error(interp, "<=: wrong argument number.\n");
SExpRef lhs = CAR(args);
SExpRef rhs = CADR(args);
if (VALTYPE(lhs) != kRealSExp && VALTYPE(lhs) != kIntegerSExp) {
return new_error(interp, "<=: type error.\n");
}
if (VALTYPE(rhs) != kRealSExp && VALTYPE(rhs) != kIntegerSExp) {
return new_error(interp, "<=: type error.\n");
}
if (VALTYPE(lhs) == kRealSExp || VALTYPE(rhs) == kRealSExp) {
double flhs, frhs;
if (VALTYPE(lhs) == kIntegerSExp) {
flhs = REF(lhs)->integer;
} else {
flhs = REF(lhs)->real;
}
if (VALTYPE(rhs) == kIntegerSExp) {
frhs = REF(rhs)->integer;
} else {
frhs = REF(rhs)->real;
}
return new_boolean(interp, flhs <= frhs);
} else {
return new_boolean(interp, REF(lhs)->integer <= REF(rhs)->integer);
}
}
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