ref: dbead6060a9577e0a013bd98e57d6b592ae4a7e3
dir: /builtins.c/
/*
Extra femtoLisp builtin functions
*/
#include "flisp.h"
#include "operators.h"
#include "cvalues.h"
#include "timefuncs.h"
#include "random.h"
#define DBL_MAXINT (1LL<<53)
#define FLT_MAXINT (1<<24)
size_t
llength(value_t v)
{
size_t n = 0;
while(iscons(v)){
n++;
v = cdr_(v);
}
return n;
}
BUILTIN("nconc", nconc)
{
if(nargs == 0)
return FL(Nil);
value_t lst, first = FL(Nil);
value_t *pcdr = &first;
cons_t *c;
uint32_t i = 0;
while(1){
lst = args[i++];
if(i >= nargs)
break;
if(iscons(lst)){
*pcdr = lst;
c = (cons_t*)ptr(lst);
while(iscons(c->cdr))
c = (cons_t*)ptr(c->cdr);
pcdr = &c->cdr;
}else if(lst != FL(Nil))
type_error("cons", lst);
}
*pcdr = lst;
return first;
}
BUILTIN("assq", assq)
{
argcount(nargs, 2);
value_t item = args[0];
value_t v = args[1];
value_t bind;
while(iscons(v)){
bind = car_(v);
if(iscons(bind) && car_(bind) == item)
return bind;
v = cdr_(v);
}
return FL(f);
}
BUILTIN("memq", memq)
{
argcount(nargs, 2);
value_t v;
cons_t *c;
for(v = args[1]; iscons(v); v = c->cdr){
if((c = ptr(v))->car == args[0])
return v;
}
return FL(f);
}
BUILTIN("length", length)
{
argcount(nargs, 1);
value_t a = args[0];
cvalue_t *cv;
if(isvector(a))
return fixnum(vector_size(a));
if(a == FL(Nil))
return fixnum(0);
if(iscons(a)){
size_t n = 0;
value_t v = a, v2 = a;
do{
n++;
v = cdr_(v);
v2 = cdr_(v2);
if(iscons(v2))
v2 = cdr_(v2);
}while(iscons(v) && iscons(v2) && v != v2);
if(iscons(v2))
return mk_double(D_PINF);
n += llength(v);
return fixnum(n);
}
if(iscprim(a)){
cv = (cvalue_t*)ptr(a);
if(cp_class(cv) == FL(bytetype))
return fixnum(1);
if(cp_class(cv) == FL(runetype))
return fixnum(runelen(*(Rune*)cp_data(cv)));
}
if(iscvalue(a) && cv_class(ptr(a))->eltype != nil)
return size_wrap(cvalue_arraylen(a));
type_error("sequence", a);
}
BUILTIN("raise", raise)
{
argcount(nargs, 1);
fl_raise(args[0]);
}
BUILTIN("exit", exit)
{
if(nargs > 1)
argcount(nargs, 1);
fl_exit(nargs > 0 ? tofixnum(args[0]) : 0);
}
BUILTIN("symbol", symbol)
{
argcount(nargs, 1);
if(__unlikely(!fl_isstring(args[0])))
type_error("string", args[0]);
return symbol(cvalue_data(args[0]));
}
BUILTIN("keyword?", keywordp)
{
argcount(nargs, 1);
return (issymbol(args[0]) &&
iskeyword((symbol_t*)ptr(args[0]))) ? FL(t) : FL(f);
}
BUILTIN("top-level-value", top_level_value)
{
argcount(nargs, 1);
symbol_t *sym = tosymbol(args[0]);
if(sym->binding == UNBOUND)
unbound_error(args[0]);
return sym->binding;
}
BUILTIN("set-top-level-value!", set_top_level_value)
{
argcount(nargs, 2);
symbol_t *sym = tosymbol(args[0]);
if(!isconstant(sym))
sym->binding = args[1];
return args[1];
}
static void
global_env_list(symbol_t *root, value_t *pv)
{
while(root != nil){
if(root->name[0] != ':' && (root->binding != UNBOUND))
*pv = fl_cons(tagptr(root, TAG_SYM), *pv);
global_env_list(root->left, pv);
root = root->right;
}
}
BUILTIN("environment", environment)
{
USED(args);
argcount(nargs, 0);
value_t lst = FL(Nil);
fl_gc_handle(&lst);
global_env_list(FL(symtab), &lst);
fl_free_gc_handles(1);
return lst;
}
BUILTIN("constant?", constantp)
{
argcount(nargs, 1);
if(issymbol(args[0]))
return isconstant((symbol_t*)ptr(args[0])) ? FL(t) : FL(f);
if(iscons(args[0])){
if(car_(args[0]) == FL(quote))
return FL(t);
return FL(f);
}
return FL(t);
}
BUILTIN("integer-valued?", integer_valuedp)
{
argcount(nargs, 1);
value_t v = args[0];
if(isfixnum(v))
return FL(t);
if(iscprim(v)){
numerictype_t nt = cp_numtype((cprim_t*)ptr(v));
if(nt < T_FLOAT)
return FL(t);
void *data = cp_data((cprim_t*)ptr(v));
if(nt == T_FLOAT){
float f = *(float*)data;
if(f < 0)
f = -f;
if(f <= FLT_MAXINT && (float)(int32_t)f == f)
return FL(t);
}else{
assert(nt == T_DOUBLE);
double d = *(double*)data;
if(d < 0)
d = -d;
if(d <= DBL_MAXINT && (double)(int64_t)d == d)
return FL(t);
}
}
return FL(f);
}
BUILTIN("integer?", integerp)
{
argcount(nargs, 1);
value_t v = args[0];
return (isfixnum(v) ||
(iscprim(v) && cp_numtype((cprim_t*)ptr(v)) < T_FLOAT)) ?
FL(t) : FL(f);
}
BUILTIN("bignum?", bignump)
{
argcount(nargs, 1);
value_t v = args[0];
return (iscvalue(v) && cp_numtype((cprim_t*)ptr(v)) == T_MPINT) ?
FL(t) : FL(f);
}
BUILTIN("fixnum", fixnum)
{
argcount(nargs, 1);
value_t v = args[0];
if(isfixnum(v))
return v;
void *p = ptr(v);
if(iscprim(v))
return fixnum(conv_to_int64(cp_data(p), cp_numtype(p)));
if(iscvalue(v) && cp_numtype(p) == T_MPINT)
return fixnum(mptov(*(mpint**)cv_data(p)));
type_error("number", v);
}
BUILTIN("truncate", truncate)
{
argcount(nargs, 1);
if(isfixnum(args[0]))
return args[0];
if(iscprim(args[0])){
cprim_t *cp = (cprim_t*)ptr(args[0]);
void *data = cp_data(cp);
numerictype_t nt = cp_numtype(cp);
double d;
if(nt == T_FLOAT)
d = (double)*(float*)data;
else if(nt == T_DOUBLE)
d = *(double*)data;
else
return args[0];
if(d > 0){
if(d > (double)INT64_MAX)
return args[0];
return return_from_uint64((uint64_t)d);
}
if(d > (double)INT64_MAX || d < (double)INT64_MIN)
return args[0];
return return_from_int64((int64_t)d);
}
type_error("number", args[0]);
}
BUILTIN("vector-alloc", vector_alloc)
{
size_t i, k, a;
value_t f, v;
if(nargs < 1)
argcount(nargs, 1);
i = tosize(args[0]);
v = alloc_vector(i, 0);
a = 1;
for(k = 0; k < i; k++){
f = a < nargs ? args[a] : FL(unspecified);
vector_elt(v, k) = f;
if((a = (a + 1) % nargs) < 1)
a = 1;
}
return v;
}
BUILTIN("time-now", time_now)
{
argcount(nargs, 0);
USED(args);
return mk_double(sec_realtime());
}
double
todouble(value_t a)
{
if(isfixnum(a))
return (double)numval(a);
if(iscprim(a)){
cprim_t *cp = (cprim_t*)ptr(a);
numerictype_t nt = cp_numtype(cp);
return conv_to_double(cp_data(cp), nt);
}
type_error("number", a);
}
BUILTIN("time->string", time_string)
{
argcount(nargs, 1);
double t = todouble(args[0]);
char buf[64];
timestring(t, buf, sizeof(buf));
return string_from_cstr(buf);
}
BUILTIN("string->time", string_time)
{
argcount(nargs, 1);
char *ptr = tostring(args[0]);
double t = parsetime(ptr);
int64_t it = (int64_t)t;
if((double)it == t && fits_fixnum(it))
return fixnum(it);
return mk_double(t);
}
BUILTIN("path-cwd", path_cwd)
{
if(nargs > 1)
argcount(nargs, 1);
if(nargs == 0){
char buf[1024];
getcwd(buf, sizeof(buf));
return string_from_cstr(buf);
}
char *ptr = tostring(args[0]);
if(chdir(ptr))
lerrorf(FL(IOError), "could not cd to %s", ptr);
return FL(t);
}
BUILTIN("path-exists?", path_existsp)
{
argcount(nargs, 1);
char *path = tostring(args[0]);
return access(path, F_OK) == 0 ? FL(t) : FL(f);
}
BUILTIN("os-getenv", os_getenv)
{
argcount(nargs, 1);
char *name = tostring(args[0]);
char *val = getenv(name);
if(val == nil)
return FL(f);
if(*val == 0)
return symbol_value(FL(emptystringsym));
return cvalue_static_cstring(val);
}
BUILTIN("os-setenv", os_setenv)
{
argcount(nargs, 2);
char *name = tostring(args[0]);
int result;
if(args[1] == FL(f))
result = unsetenv(name);
else{
char *val = tostring(args[1]);
result = setenv(name, val, 1);
}
if(result != 0)
lerrorf(FL(ArgError), "invalid environment variable");
return FL(t);
}
BUILTIN("rand", rand)
{
USED(args); USED(nargs);
#ifdef BITS64
uint64_t x = genrand_uint64();
#else
uint32_t x = genrand_uint32();
#endif
return fixnum(x >> 3);
}
BUILTIN("rand-uint32", rand_uint32)
{
USED(args); USED(nargs);
return mk_uint32(genrand_uint32());
}
BUILTIN("rand-uint64", rand_uint64)
{
USED(args); USED(nargs);
return mk_uint64(genrand_uint64());
}
BUILTIN("rand-double", rand_double)
{
USED(args); USED(nargs);
return mk_double(genrand_double());
}
BUILTIN("rand-float", rand_float)
{
USED(args); USED(nargs);
return mk_float(genrand_double());
}
#define BUILTIN_(lname, cname) \
BUILTIN(lname, cname) \
{ \
argcount(nargs, 1); \
return mk_double(cname(todouble(args[0]))); \
}
BUILTIN_("sqrt", sqrt)
BUILTIN_("exp", exp)
BUILTIN_("log", log)
BUILTIN_("log10", log10)
BUILTIN_("sin", sin)
BUILTIN_("cos", cos)
BUILTIN_("tan", tan)
BUILTIN_("asin", asin)
BUILTIN_("acos", acos)
BUILTIN_("atan", atan)
BUILTIN_("floor", floor)
BUILTIN_("ceiling", ceil)
#undef BUILTIN_
#define BUILTIN_(lname, cname) \
BUILTIN(lname, cname) \
{ \
argcount(nargs, 2); \
return mk_double(cname(todouble(args[0]), todouble(args[1]))); \
}
BUILTIN_("pow", pow)