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Implemented and/or

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This commit is contained in:
Brandon Rozek 2018-06-12 19:06:17 -04:00
parent 8f26cd847e
commit da94105307
3 changed files with 52 additions and 1 deletions
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41
lval/conditionals.c
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@ -1,6 +1,7 @@
#include "conditionals.h"
#include "numbers.h"
#include "operations.h"
#include "expressions.h"
#include "error.h"
lval* builtin_gt(lenv* e, lval* a) {
@ -97,6 +98,17 @@ lval* builtin_cmp(lenv* e, lval* a, char* op) {
if (strcmp(op, "!=") == 0) {
r = !lval_eq(a->cell[0], a->cell[1]);
}
if (strcmp(op, "or") == 0) {
LASSERT_TYPE("or", a, 0, LVAL_LONG)
LASSERT_TYPE("or", a, 1, LVAL_LONG)
r = (a->cell[0]->data.num || a->cell[1]->data.num);
}
if (strcmp(op, "and") == 0) {
LASSERT_TYPE("and", a, 0, LVAL_LONG)
LASSERT_TYPE("and", a, 1, LVAL_LONG)
r = (a->cell[0]->data.num && a->cell[1]->data.num);
}
lval_del(a);
return lval_long(r);
}
@ -108,3 +120,32 @@ lval* builtin_eq(lenv* e, lval* a) {
lval* builtin_ne(lenv* e, lval* a) {
return builtin_cmp(e, a, "!=");
}
lval* builtin_or(lenv* e, lval* a) {
return builtin_cmp(e, a, "or");
}
lval* builtin_and(lenv* e, lval* a) {
return builtin_cmp(e, a, "and");
}
lval* builtin_if(lenv* e, lval* a) {
LASSERT_NUM("if", a, 3)
LASSERT_TYPE("if", a, 0, LVAL_LONG)
LASSERT_TYPE("if", a, 1, LVAL_QEXPR)
LASSERT_TYPE("if", a, 2, LVAL_QEXPR)
// Mark both expressions as evaluable
lval* x;
a->cell[1]->type = LVAL_SEXPR;
a->cell[2]->type = LVAL_SEXPR;
if (a->cell[0]->data.num) {
x = lval_eval(e, lval_pop(a, 1));
} else {
x = lval_eval(e, lval_pop(a, 2));
}
// Delete the argument list and return
lval_del(a);
return x;
}

3
lval/conditionals.h
View file

@ -15,5 +15,8 @@ lval* builtin_cmp(lenv* e, lval* a, char* op);
lval* builtin_eq(lenv* e, lval* a);
lval* builtin_ne(lenv* e, lval* a);
lval* builtin_if(lenv* e, lval* a);
lval* builtin_and(lenv* e, lval* a);
lval* builtin_or(lenv* e, lval* a);
#endif

7
lval/environment.c
View file

@ -136,6 +136,13 @@ void lenv_add_builtins(lenv* e) {
lenv_add_builtin(e, "==", builtin_eq);
lenv_add_builtin(e, "!=", builtin_ne);
lenv_add_builtin(e, "if", builtin_if);
lenv_add_builtin(e, "and", builtin_and);
lenv_add_builtin(e, "&&", builtin_and);
lenv_add_builtin(e, "or", builtin_or);
lenv_add_builtin(e, "||", builtin_or);
}
lval* builtin_ls(lenv* e, lval* a) {