static int
exec_minus(node_ctx* ctx, int argc, strm_value* args, strm_value* ret)
{
if (argc == 1) {
if (strm_int_p(args[0])) {
*ret = strm_int_value(-strm_value_int(args[0]));
return 0;
}
if (strm_flt_p(args[0])) {
*ret = strm_flt_value(-strm_value_flt(args[0]));
return 0;
}
return 1;
}
assert(argc == 2);
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])-strm_value_int(args[1]));
return 0;
}
else if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])-strm_value_flt(args[1]));
return 0;
}
return 1;
}
static int
exec_minus(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
if (argc == 1) {
if (strm_int_p(args[0])) {
*ret = strm_int_value(-strm_value_int(args[0]));
return STRM_OK;
}
if (strm_flt_p(args[0])) {
*ret = strm_flt_value(-strm_value_flt(args[0]));
return STRM_OK;
}
return STRM_NG;
}
assert(argc == 2);
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])-strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])-strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
static int
exec_plus(strm_state* state, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_str_p(*args)) {
strm_string *str1 = strm_value_str(args[0]);
strm_string *str2 = strm_value_str(args[1]);
strm_string *str3 = strm_str_new(NULL, str1->len + str2->len);
char *p;
p = (char*)str3->ptr;
memcpy(p, str1->ptr, str1->len);
memcpy(p+str1->len, str2->ptr, str2->len);
p[str3->len] = '\0';
*ret = strm_ptr_value(str3);
return STRM_OK;
}
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])+strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])+strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
static int
exec_plus(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_string_p(*args)) {
strm_string str1 = strm_value_str(args[0]);
strm_string str2 = strm_value_str(args[1]);
strm_string str3 = strm_str_new(NULL, strm_str_len(str1) + strm_str_len(str2));
char *p;
p = (char*)strm_str_ptr(str3);
memcpy(p, strm_str_ptr(str1), strm_str_len(str1));
memcpy(p+strm_str_len(str1), strm_str_ptr(str2), strm_str_len(str2));
p[strm_str_len(str3)] = '\0';
*ret = strm_str_value(str3);
return STRM_OK;
}
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])+strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])+strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
static int
count_finish(strm_stream* strm, strm_value data)
{
struct count_data* d = strm->data;
strm_emit(strm, strm_int_value(d->count), NULL);
free(d);
return STRM_OK;
}
static int
str_length(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
strm_int len;
if (argc != 1) return STRM_NG;
len = strm_str_len(strm_value_str(args[0]));
*ret = strm_int_value(len);
return STRM_OK;
}
static int
str_length(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
char* p;
strm_int len;
strm_get_args(strm, argc, args, "s", &p, &len);
*ret = strm_int_value(len);
return STRM_OK;
}
static strm_value
csv_value(const char* p, strm_int len, enum csv_type ftype)
{
const char *s = p;
const char *send = s+len;
long i=0;
double f, pow = 1;
enum csv_type type = TYPE_STR;
switch (ftype) {
case TYPE_UNSPC:
case TYPE_NUM:
/* skip preceding white spaces */
while (isspace((int)*s)) s++;
/* check if numbers */
while (s<send) {
switch (*s) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (type == TYPE_STR) type = TYPE_INT;
i = i*10 + (*s - '0');
pow *= 10;
break;
case '.':
if (type == TYPE_FLT) { /* second dot */
type = TYPE_TIME;
break;
}
type = TYPE_FLT;
f = i;
i = 0;
pow = 1;
break;
default:
type = TYPE_UNSPC;
break;
}
s++;
}
default:
break;
}
switch (type) {
case TYPE_INT:
return strm_int_value(i);
case TYPE_FLT:
f += i / pow;
return strm_flt_value(f);
default:
return csv_string(p, len, ftype);
}
/* not reached */
}
static int
gen_seq(strm_stream* strm, strm_value data)
{
struct seq_data* d = strm->data;
if (d->end > 0 && d->n > d->end) {
strm_stream_close(strm);
return STRM_OK;
}
strm_emit(strm, strm_int_value(d->n), gen_seq);
d->n += d->inc;
return STRM_OK;
}
static int
seq_seed(strm_task* task, strm_value data)
{
struct seq_seeder *s = task->data;
if (s->n > s->end) {
strm_task_close(task);
return STRM_OK;
}
strm_emit(task, strm_int_value(s->n), seq_seed);
s->n += s->inc;
return STRM_OK;
}
static int
exec_mult(strm_state* state, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])*strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value(strm_value_flt(args[0])*strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
static int
exec_mod(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])%strm_value_int(args[1]));
return STRM_OK;
}
if (strm_num_p(args[0])) {
*ret = strm_flt_value((int)strm_value_flt(args[0])%(int)strm_value_flt(args[1]));
return STRM_OK;
}
return STRM_NG;
}
static int
exec_bar(node_ctx* ctx, int argc, strm_value* args, strm_value* ret)
{
assert(argc == 2);
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])|strm_value_int(args[1]));
return 0;
}
if (strm_task_p(args[0]) && strm_task_p(args[1])) {
strm_connect(strm_value_task(args[0]), strm_value_task(args[1]));
*ret = args[1];
return 0;
}
node_raise(ctx, "type error");
return 1;
}
static strm_value
csv_value(const char* p, size_t len)
{
const char *s = p;
const char *send = s+len;
long i=0;
double f, pow = 1;
int type = 0; /* 0: string, 1: int, 2: float */
/* skip preceding white spaces */
while (isspace((int)*s)) s++;
/* check if numbers */
while (s<send) {
switch (*s) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (type == STRING_TYPE) type = 1;
i = i*10 + (*s - '0');
pow *= 10;
break;
case '.':
type = 2;
f = i;
i = 0;
pow = 1;
break;
default:
return strm_str_value(p, len);
}
s++;
}
switch (type) {
case 1: /* int */
return strm_int_value(i);
case 2: /* float */
f += i / pow;
return strm_flt_value(f);
default:
return strm_str_value(p, len);
}
/* not reached */
}
static int
exec_expr(node_ctx* ctx, node* np, strm_value* val)
{
int n;
if (np == NULL) {
return 1;
}
switch (np->type) {
/*
case NODE_ARGS:
break;
case NODE_EMIT:
break;
*/
case NODE_IDENT:
*val = strm_var_get(np->value.v.s);
return 0;
case NODE_IF:
{
strm_value v;
node_if* nif = (node_if*)np;
n = exec_expr(ctx, nif->cond, &v);
if (n) return n;
if (strm_value_bool(v)) {
return exec_expr(ctx, nif->then, val);
}
else if (nif->opt_else != NULL) {
return exec_expr(ctx, nif->opt_else, val);
}
else {
*val = strm_nil_value();
return 0;
}
}
break;
case NODE_OP:
{
node_op* nop = (node_op*)np;
strm_value args[2];
int i=0;
if (nop->lhs) {
n = exec_expr(ctx, nop->lhs, &args[i++]);
if (n) return n;
}
if (nop->rhs) {
n = exec_expr(ctx, nop->rhs, &args[i++]);
if (n) return n;
}
return exec_call(ctx, nop->op, i, args, val);
}
break;
case NODE_CALL:
{
/* TODO: wip code of ident */
node_call* ncall = (node_call*)np;
if (ncall->ident != NULL) {
int i;
node_values* v0 = (node_values*)ncall->args;
strm_value *args = malloc(sizeof(strm_value)*v0->len);
for (i = 0; i < v0->len; i++) {
n = exec_expr(ctx, v0->data[i], &args[i]);
if (n) return n;
}
return exec_call(ctx, ncall->ident->value.v.s, i, args, val);
}
else {
node_block* nblk = (node_block*)ncall;
strm_value v;
int n;
n = exec_expr(ctx, nblk->compstmt, &v);
if (n && ctx->exc->type == NODE_ERROR_RETURN) {
*val = ctx->exc->arg;
free(ctx->exc);
return 0;
}
}
}
break;
case NODE_RETURN:
{
node_return* nreturn = (node_return*)np;
ctx->exc = malloc(sizeof(node_error));
ctx->exc->type = NODE_ERROR_RETURN;
n = exec_expr(ctx, nreturn->rv, &ctx->exc->arg);
return n;
}
break;
case NODE_STMTS:
{
int i, n;
node_values* v = (node_values*)np;
for (i = 0; i < v->len; i++) {
n = exec_expr(ctx, v->data[i], val);
if (n) return n;
}
return 0;
}
break;
case NODE_VALUE:
switch (np->value.t) {
case NODE_VALUE_BOOL:
*val = strm_bool_value(np->value.v.b);
return 0;
case NODE_VALUE_NIL:
*val = strm_nil_value();
return 0;
case NODE_VALUE_STRING:
case NODE_VALUE_IDENT:
*val = strm_ptr_value(np->value.v.s);
return 0;
case NODE_VALUE_DOUBLE:
*val = strm_flt_value(np->value.v.d);
return 0;
case NODE_VALUE_INT:
*val = strm_int_value(np->value.v.i);
return 0;
/* following type should not be evaluated */
case NODE_VALUE_ERROR:
case NODE_VALUE_USER:
default:
return 1;
}
default:
break;
}
return 1;
}
static int
exec_expr(strm_stream* strm, strm_state* state, node* np, strm_value* val)
{
int n;
if (np == NULL) {
return STRM_NG;
}
switch (np->type) {
/*
case NODE_ARGS:
break;
*/
case NODE_NS:
{
node_ns* ns = (node_ns*)np;
strm_state* s = strm_ns_find(state, node_to_sym(ns->name));
if (!s) {
strm_raise(strm, "failed to create namespace");
return STRM_NG;
}
return exec_expr(strm, s, ns->body, val);
}
case NODE_IMPORT:
{
node_import *ns = (node_import*)np;
strm_state* s = strm_ns_get(node_to_sym(ns->name));
if (!s) {
strm_raise(strm, "no such namespace");
return STRM_NG;
}
n = strm_env_copy(state, s);
if (n) {
strm_raise(strm, "failed to import");
return n;
}
return STRM_OK;
}
break;
case NODE_SKIP:
strm_set_exc(strm, NODE_ERROR_SKIP, strm_nil_value());
return STRM_OK;
case NODE_EMIT:
{
int i, n;
node_array* v0;
v0 = (node_array*)((node_emit*)np)->emit;
if (!v0) {
strm_emit(strm, strm_nil_value(), NULL);
}
else {
for (i = 0; i < v0->len; i++) {
n = exec_expr(strm, state, v0->data[i], val);
if (n) return n;
strm_emit(strm, *val, NULL);
}
}
return STRM_OK;
}
break;
case NODE_LET:
{
node_let *nlet = (node_let*)np;
n = exec_expr(strm, state, nlet->rhs, val);
if (n) {
strm_raise(strm, "failed to assign");
return n;
}
return strm_var_set(state, node_to_sym(nlet->lhs), *val);
}
case NODE_ARRAY:
{
node_array* v0 = (node_array*)np;
strm_array arr = strm_ary_new(NULL, v0->len);
strm_value *ptr = (strm_value*)strm_ary_ptr(arr);
int i=0;
for (i = 0; i < v0->len; i++, ptr++) {
n = exec_expr(strm, state, v0->data[i], ptr);
if (n) return n;
}
if (v0->headers) {
strm_ary_headers(arr) = ary_headers(v0->headers, v0->len);
}
if (v0->ns) {
strm_ary_ns(arr) = strm_ns_get(node_to_sym(v0->ns));
}
else {
strm_ary_ns(arr) = strm_str_null;
}
*val = strm_ary_value(arr);
return STRM_OK;
}
case NODE_IDENT:
{
node_ident* ni = (node_ident*)np;
n = strm_var_get(state, node_to_sym(ni->name), val);
if (n) {
strm_raise(strm, "failed to reference variable");
}
return n;
}
case NODE_IF:
{
strm_value v;
node_if* nif = (node_if*)np;
n = exec_expr(strm, state, nif->cond, &v);
if (n) return n;
if (strm_bool_p(v) && strm_value_bool(v)) {
return exec_expr(strm, state, nif->then, val);
}
else if (nif->opt_else != NULL) {
return exec_expr(strm, state, nif->opt_else, val);
}
else {
*val = strm_nil_value();
return STRM_OK;
}
}
break;
case NODE_OP:
{
node_op* nop = (node_op*)np;
strm_value args[2];
int i=0;
if (nop->lhs) {
n = exec_expr(strm, state, nop->lhs, &args[i++]);
if (n) return n;
}
if (nop->rhs) {
n = exec_expr(strm, state, nop->rhs, &args[i++]);
if (n) return n;
}
return exec_call(strm, state, node_to_sym(nop->op), i, args, val);
}
break;
case NODE_LAMBDA:
{
strm_lambda lambda = malloc(sizeof(struct strm_lambda));
if (!lambda) return STRM_NG;
lambda->type = STRM_PTR_LAMBDA;
lambda->body = (node_lambda*)np;
lambda->state = state;
*val = strm_ptr_value(lambda);
return STRM_OK;
}
break;
case NODE_CALL:
{
/* TODO: wip code of ident */
node_call* ncall = (node_call*)np;
int i;
node_nodes* v0 = (node_nodes*)ncall->args;
strm_value *args = malloc(sizeof(strm_value)*v0->len);
for (i = 0; i < v0->len; i++) {
n = exec_expr(strm, state, v0->data[i], &args[i]);
if (n) return n;
}
return exec_call(strm, state, node_to_sym(ncall->ident), i, args, val);
}
break;
case NODE_RETURN:
{
node_return* nreturn = (node_return*)np;
node_nodes* args = (node_nodes*)nreturn->rv;
strm_value arg;
if (!args) {
arg = strm_nil_value();
}
else {
switch (args->len) {
case 0:
arg = strm_nil_value();
break;
case 1:
n = exec_expr(strm, state, args->data[0], &arg);
if (n) return n;
break;
default:
{
strm_array ary = strm_ary_new(NULL, args->len);
strm_int i;
for (i=0; i<args->len; i++) {
n = exec_expr(strm, state, args->data[i], (strm_value*)&strm_ary_ptr(ary)[i]);
if (n) return n;
}
}
break;
}
}
strm_set_exc(strm, NODE_ERROR_RETURN, arg);
return STRM_OK;
}
break;
case NODE_NODES:
{
int i;
node_nodes* v = (node_nodes*)np;
for (i = 0; i < v->len; i++) {
n = exec_expr(strm, state, v->data[i], val);
if (n) {
if (strm) {
node_error* exc = strm->exc;
if (exc != NULL) {
node* n = v->data[i];
exc->fname = n->fname;
exc->lineno = n->lineno;
}
}
return n;
}
}
}
return STRM_OK;
case NODE_INT:
*val = strm_int_value(((node_int*)np)->value);
return STRM_OK;
case NODE_FLOAT:
*val = strm_int_value(((node_float*)np)->value);
return STRM_OK;
case NODE_BOOL:
*val = strm_bool_value(((node_bool*)np)->value);
return STRM_OK;
case NODE_NIL:
*val = strm_nil_value();
return STRM_OK;
case NODE_STR:
*val = strm_str_value(node_to_str(((node_str*)np)->value));
return STRM_OK;
default:
break;
}
return STRM_NG;
}
static int
exec_bar(strm_stream* strm, int argc, strm_value* args, strm_value* ret)
{
strm_value lhs, rhs;
assert(argc == 2);
/* int x int */
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])|strm_value_int(args[1]));
return STRM_OK;
}
lhs = args[0];
/* lhs: io */
if (strm_io_p(lhs)) {
lhs = strm_stream_value(strm_io_stream(lhs, STRM_IO_READ));
}
/* lhs: lambda */
else if (strm_lambda_p(lhs)) {
strm_lambda lmbd = strm_value_lambda(lhs);
lhs = strm_stream_value(strm_stream_new(strm_filter, blk_exec, NULL, (void*)lmbd));
}
/* lhs: array */
else if (strm_array_p(lhs)) {
struct array_data *arrd = malloc(sizeof(struct array_data));
arrd->arr = strm_value_ary(lhs);
arrd->n = 0;
lhs = strm_stream_value(strm_stream_new(strm_producer, arr_exec, NULL, (void*)arrd));
}
/* lhs: should be stream */
rhs = args[1];
/* rhs: io */
if (strm_io_p(rhs)) {
rhs = strm_stream_value(strm_io_stream(rhs, STRM_IO_WRITE));
}
/* rhs: lambda */
else if (strm_lambda_p(rhs)) {
strm_lambda lmbd = strm_value_lambda(rhs);
rhs = strm_stream_value(strm_stream_new(strm_filter, blk_exec, NULL, (void*)lmbd));
}
/* rhs: cfunc */
else if (strm_cfunc_p(rhs)) {
strm_cfunc func = strm_value_cfunc(rhs);
rhs = strm_stream_value(strm_stream_new(strm_filter, cfunc_exec, NULL, func));
}
/* stream x stream */
if (strm_stream_p(lhs) && strm_stream_p(rhs)) {
strm_stream* lstrm = strm_value_stream(lhs);
strm_stream* rstrm = strm_value_stream(rhs);
if (lstrm == NULL || rstrm == NULL ||
lstrm->mode == strm_consumer ||
rstrm->mode == strm_producer) {
strm_raise(strm, "stream error");
return STRM_NG;
}
strm_stream_connect(strm_value_stream(lhs), strm_value_stream(rhs));
*ret = rhs;
return STRM_OK;
}
strm_raise(strm, "type error");
return STRM_NG;
}
static int
exec_expr(strm_state* state, node* np, strm_value* val)
{
int n;
if (np == NULL) {
return STRM_NG;
}
switch (np->type) {
/*
case NODE_ARGS:
break;
*/
case NODE_SKIP:
{
state->exc = malloc(sizeof(node_error));
state->exc->type = NODE_ERROR_SKIP;
state->exc->arg = strm_nil_value();
return STRM_OK;
}
case NODE_EMIT:
{
int i, n;
node_values* v0;
if (!state->task) {
node_raise(state, "failed to emit");
}
v0 = (node_values*)np->value.v.p;
for (i = 0; i < v0->len; i++) {
n = exec_expr(state, v0->data[i], val);
if (n) return n;
strm_emit(state->task, *val, NULL);
}
return STRM_OK;
}
break;
case NODE_LET:
{
node_let *nlet = (node_let*)np;
n = exec_expr(state, nlet->rhs, val);
if (n) {
node_raise(state, "failed to assign");
return n;
}
return strm_var_set(state, nlet->lhs, *val);
}
case NODE_ARRAY:
{
node_values* v0 = (node_values*)np;
strm_array *arr = strm_ary_new(NULL, v0->len);
strm_value *ptr = (strm_value*)arr->ptr;
int i=0;
for (i = 0; i < v0->len; i++, ptr++) {
n = exec_expr(state, v0->data[i], ptr);
if (n) return n;
}
*val = strm_ptr_value(arr);
return STRM_OK;
}
case NODE_MAP:
{
node_map* v0 = (node_map*)np;
strm_value nmap;
strm_array* ary;
n = exec_expr(state, v0->values, &nmap);
if (n) return n;
ary = strm_value_ary(nmap);
ary->headers = v0->headers;
*val = nmap;
return STRM_OK;
}
case NODE_IDENT:
n = strm_var_get(state, np->value.v.s, val);
if (n) {
node_raise(state, "failed to reference variable");
}
return n;
case NODE_IF:
{
strm_value v;
node_if* nif = (node_if*)np;
n = exec_expr(state, nif->cond, &v);
if (n) return n;
if (strm_value_bool(v) && v.val.i) {
return exec_expr(state, nif->then, val);
}
else if (nif->opt_else != NULL) {
return exec_expr(state, nif->opt_else, val);
}
else {
*val = strm_nil_value();
return STRM_OK;
}
}
break;
case NODE_OP:
{
node_op* nop = (node_op*)np;
strm_value args[2];
int i=0;
if (nop->lhs) {
n = exec_expr(state, nop->lhs, &args[i++]);
if (n) return n;
}
if (nop->rhs) {
n = exec_expr(state, nop->rhs, &args[i++]);
if (n) return n;
}
return exec_call(state, nop->op, i, args, val);
}
break;
case NODE_LAMBDA:
{
struct strm_lambda* lambda = malloc(sizeof(strm_lambda));
if (!lambda) return STRM_NG;
lambda->type = STRM_OBJ_LAMBDA;
lambda->body = (node_lambda*)np;
lambda->state = state;
*val = strm_ptr_value(lambda);
return STRM_OK;
}
break;
case NODE_CALL:
{
/* TODO: wip code of ident */
node_call* ncall = (node_call*)np;
int i;
node_values* v0 = (node_values*)ncall->args;
strm_value *args = malloc(sizeof(strm_value)*v0->len);
for (i = 0; i < v0->len; i++) {
n = exec_expr(state, v0->data[i], &args[i]);
if (n) return n;
}
return exec_call(state, ncall->ident, i, args, val);
}
break;
case NODE_RETURN:
{
node_return* nreturn = (node_return*)np;
node_values* args = (node_values*)nreturn->rv;
state->exc = malloc(sizeof(node_error));
state->exc->type = NODE_ERROR_RETURN;
switch (args->len) {
case 0:
state->exc->arg = strm_nil_value();
break;
case 1:
n = exec_expr(state, args->data[0], &state->exc->arg);
if (n) return n;
break;
default:
{
strm_array* ary = strm_ary_new(NULL, args->len);
size_t i;
for (i=0; i<args->len; i++) {
n = exec_expr(state, args->data[i], (strm_value*)&ary->ptr[i]);
if (n) return n;
}
}
break;
}
return STRM_NG;
}
break;
case NODE_STMTS:
{
int i;
node_values* v = (node_values*)np;
for (i = 0; i < v->len; i++) {
n = exec_expr(state, v->data[i], val);
if (state->exc != NULL) return STRM_NG;
if (n) return n;
}
}
return STRM_OK;
case NODE_VALUE:
switch (np->value.t) {
case NODE_VALUE_BOOL:
*val = strm_bool_value(np->value.v.b);
return STRM_OK;
case NODE_VALUE_NIL:
*val = strm_nil_value();
return STRM_OK;
case NODE_VALUE_STRING:
case NODE_VALUE_IDENT:
*val = strm_ptr_value(np->value.v.s);
return STRM_OK;
case NODE_VALUE_DOUBLE:
*val = strm_flt_value(np->value.v.d);
return STRM_OK;
case NODE_VALUE_INT:
*val = strm_int_value(np->value.v.i);
return STRM_OK;
/* following type should not be evaluated */
case NODE_VALUE_ERROR:
case NODE_VALUE_USER:
default:
return STRM_NG;
}
default:
break;
}
return STRM_NG;
}
static int
exec_bar(strm_state* state, int argc, strm_value* args, strm_value* ret)
{
strm_value lhs, rhs;
assert(argc == 2);
/* int x int */
if (strm_int_p(args[0]) && strm_int_p(args[1])) {
*ret = strm_int_value(strm_value_int(args[0])|strm_value_int(args[1]));
return STRM_OK;
}
lhs = args[0];
/* lhs: io */
if (strm_io_p(lhs)) {
strm_io *io = strm_value_io(lhs);
lhs = strm_task_value(strm_io_open(io, STRM_IO_READ));
}
/* lhs: lambda */
else if (strm_lambda_p(lhs)) {
strm_lambda *lmbd = strm_value_lambda(lhs)
lhs = strm_task_value(strm_task_new(strm_task_filt, blk_exec, NULL, (void*)lmbd));
}
/* lhs: array */
else if (strm_array_p(lhs)) {
struct array_data *arrd = malloc(sizeof(struct array_data));
arrd->arr = strm_value_array(lhs);
arrd->n = 0;
lhs = strm_task_value(strm_task_new(strm_task_prod, arr_exec, arr_finish, (void*)arrd));
}
/* lhs: should be task */
rhs = args[1];
/* rhs: io */
if (strm_io_p(rhs)) {
strm_io *io = strm_value_io(rhs);
rhs = strm_task_value(strm_io_open(io, STRM_IO_WRITE));
}
/* rhs: lambda */
else if (strm_lambda_p(rhs)) {
strm_lambda *lmbd = strm_value_lambda(rhs);
rhs = strm_task_value(strm_task_new(strm_task_filt, blk_exec, NULL, (void*)lmbd));
}
/* rhs: cfunc */
else if (strm_cfunc_p(rhs)) {
void *func = rhs.val.p;
rhs = strm_task_value(strm_task_new(strm_task_filt, cfunc_exec, NULL, func));
}
/* task x task */
if (strm_task_p(lhs) && strm_task_p(rhs)) {
if (lhs.val.p == NULL || rhs.val.p == NULL) {
node_raise(state, "task error");
return STRM_NG;
}
strm_task_connect(strm_value_task(lhs), strm_value_task(rhs));
*ret = rhs;
return STRM_OK;
}
node_raise(state, "type error");
return STRM_NG;
}
