LakeVal *apply(LakeCtx *ctx, LakeVal *fnVal, LakeList *args)
{
LakeVal *result = NULL;
if (lake_is_type(TYPE_PRIM, fnVal)) {
LakePrimitive *prim = PRIM(fnVal);
int arity = prim->arity;
if (arity == ARITY_VARARGS || LIST_N(args) == arity) {
result = prim->fn(ctx, args);
}
else {
ERR("%s expects %d params but got %zu", prim->name, arity, LIST_N(args));
result = NULL;
}
}
else if (lake_is_type(TYPE_FN, fnVal)) {
LakeFn *fn = FN(fnVal);
/* Check # of params */
size_t nparams = LIST_N(fn->params);
if (!fn->varargs && LIST_N(args) != nparams) {
ERR("expected %zu params but got %zu", nparams, LIST_N(args));
return NULL;
}
else if (fn->varargs && LIST_N(args) < nparams) {
ERR("expected at least %zu params but got %zu", nparams, LIST_N(args));
return NULL;
}
Env *env = env_make(fn->closure);
/* bind each (param,arg) pair in env */
size_t i;
for (i = 0; i < nparams; ++i) {
env_define(env, SYM(LIST_VAL(fn->params, i)), LIST_VAL(args, i));
}
/* bind varargs */
if (fn->varargs) {
LakeList *remainingArgs = list_make_with_capacity(LIST_N(args) - nparams);
for (; i < LIST_N(args); ++i) {
list_append(remainingArgs, LIST_VAL(args, i));
}
env_define(env, fn->varargs, VAL(remainingArgs));
}
/* evaluate body */
result = eval_exprs1(ctx, env, fn->body);
}
else {
ERR("not a function: %s", lake_repr(fnVal));
}
return result;
}
void el_substandrun_str (stralloc *src, unsigned int srcbase, char const *const *envp, exlsn_t const *info)
{
stralloc dst = STRALLOC_ZERO ;
register int r = el_substitute(&dst, src->s + srcbase, src->len, info->vars.s, info->values.s, genalloc_s(elsubst_t const, &info->data), genalloc_len(elsubst_t const, &info->data)) ;
if (r < 0) strerr_diefu1sys(111, "el_substitute") ;
if (!r) _exit(0) ;
stralloc_free(src) ;
{
char const *v[r + 1] ;
if (!env_make(v, r, dst.s, dst.len)) strerr_diefu1sys(111, "env_make") ;
v[r] = 0 ;
pathexec_r(v, envp, env_len(envp), info->modifs.s, info->modifs.len) ;
}
strerr_dieexec(111, dst.s) ;
}
int env_init() {
int len, i;
struct env *env;
char *res[PACKAGE_ENV_LISTLEN];
char *env_value = getenv(env_name);
INIT_LIST_HEAD(&env_list);
if (!env_value)
return 0;
len = strsplit(env_value, ";", res, PACKAGE_ENV_LISTLEN);
for (i = 0; i < len; i++) {
env = malloc(sizeof(*env));
if (!env)
continue;
env_make(env, res[i]);
INIT_LIST_HEAD(&env->allpackages);
list_add(&env->alllink, &env_list);
free(res[i]);
pkg_makeroot(env);
}
return 0;
}
env *prepare_env() {
env *e = env_make(NULL, 8);
load_core(e);
return e;
}
status_e initenv(void)
{
std_env = env_make( environ ) ;
return( ( std_env == NULL ) ? FAILED : OK ) ;
}