static void Ap_splice(js_State *J)
{
unsigned int top = js_gettop(J);
unsigned int len, start, del, add, k;
double f;
js_newarray(J);
len = js_getlength(J, 0);
f = js_tointeger(J, 1);
if (f < 0) f = f + len;
start = f < 0 ? 0 : f > len ? len : f;
f = js_tointeger(J, 2);
del = f < 0 ? 0 : f > len - start ? len - start : f;
/* copy deleted items to return array */
for (k = 0; k < del; ++k)
if (js_hasindex(J, 0, start + k))
js_setindex(J, -2, k);
js_setlength(J, -1, del);
/* shift the tail to resize the hole left by deleted items */
add = top - 3;
if (add < del) {
for (k = start; k < len - del; ++k) {
if (js_hasindex(J, 0, k + del))
js_setindex(J, 0, k + add);
else
js_delindex(J, 0, k + add);
}
for (k = len; k > len - del + add; --k)
js_delindex(J, 0, k - 1);
} else if (add > del) {
for (k = len - del; k > start; --k) {
if (js_hasindex(J, 0, k + del - 1))
js_setindex(J, 0, k + add - 1);
else
js_delindex(J, 0, k + add - 1);
}
}
/* copy new items into the hole */
for (k = 0; k < add; ++k) {
js_copy(J, 3 + k);
js_setindex(J, 0, start + k);
}
js_setlength(J, 0, len - del + add);
}
int js_getlength(js_State *J, int idx)
{
int len;
js_getproperty(J, idx, "length");
len = js_tointeger(J, -1);
js_pop(J, 1);
return len;
}
static void Sp_charCodeAt(js_State *J)
{
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = js_runeat(J, s, pos);
if (rune > 0)
js_pushnumber(J, rune);
else
js_pushnumber(J, NAN);
}
static void Sp_substring(js_State *J)
{
const char *str = js_tostring(J, 0);
const char *ss, *ee;
int len = utflen(str);
int s = js_tointeger(J, 1);
int e = js_isdefined(J, 2) ? js_tointeger(J, 2) : len;
s = s < 0 ? 0 : s > len ? len : s;
e = e < 0 ? 0 : e > len ? len : e;
if (s < e) {
ss = js_utfidxtoptr(str, s);
ee = js_utfidxtoptr(ss, e - s);
} else {
ss = js_utfidxtoptr(str, e);
ee = js_utfidxtoptr(ss, s - e);
}
js_pushlstring(J, ss, ee - ss);
}
static void Ap_slice(js_State *J)
{
unsigned int len, s, e, n;
double sv, ev;
js_newarray(J);
len = js_getlength(J, 0);
sv = js_tointeger(J, 1);
ev = js_isdefined(J, 2) ? js_tointeger(J, 2) : len;
if (sv < 0) sv = sv + len;
if (ev < 0) ev = ev + len;
s = sv < 0 ? 0 : sv > len ? len : sv;
e = ev < 0 ? 0 : ev > len ? len : ev;
for (n = 0; s < e; ++s, ++n)
if (js_hasindex(J, 0, s))
js_setindex(J, -2, n);
}
static void Sp_charAt(js_State *J)
{
char buf[UTFmax + 1];
const char *s = js_tostring(J, 0);
int pos = js_tointeger(J, 1);
Rune rune = js_runeat(J, s, pos);
if (rune > 0) {
buf[runetochar(buf, &rune)] = 0;
js_pushstring(J, buf);
} else {
js_pushliteral(J, "");
}
}
static void Sp_lastIndexOf(js_State *J)
{
const char *haystack = js_tostring(J, 0);
const char *needle = js_tostring(J, 1);
int pos = js_isdefined(J, 2) ? js_tointeger(J, 2) : strlen(haystack);
int len = strlen(needle);
int k = 0, last = -1;
Rune rune;
while (*haystack && k <= pos) {
if (!strncmp(haystack, needle, len))
last = k;
haystack += chartorune(&rune, haystack);
++k;
}
js_pushnumber(J, last);
}
static void Sp_indexOf(js_State *J)
{
const char *haystack = js_tostring(J, 0);
const char *needle = js_tostring(J, 1);
int pos = js_tointeger(J, 2);
int len = strlen(needle);
int k = 0;
Rune rune;
while (*haystack) {
if (k >= pos && !strncmp(haystack, needle, len)) {
js_pushnumber(J, k);
return;
}
haystack += chartorune(&rune, haystack);
++k;
}
js_pushnumber(J, -1);
}
static void Ap_lastIndexOf(js_State *J)
{
int k, len, from;
len = js_getlength(J, 0);
from = js_isdefined(J, 2) ? js_tointeger(J, 2) : len - 1;
if (from > len - 1) from = len - 1;
if (from < 0) from = len + from;
js_copy(J, 1);
for (k = from; k >= 0; --k) {
if (js_hasindex(J, 0, k)) {
if (js_strictequal(J)) {
js_pushnumber(J, k);
return;
}
js_pop(J, 1);
}
}
js_pushnumber(J, -1);
}
JsonNode *
js_util_tojsonnode(js_State *state, int idx)
{
const char *s;
JsonNode *node;
JsonNode *tmp;
JsonObject *object;
JsonArray *array;
unsigned int i, length;
node = json_node_alloc();
if (js_isstring(state, idx))
{
json_node_init_string(node, js_tostring(state, idx));
}
else if (js_isnumber(state, idx))
{
json_node_init_int(node, js_tointeger(state, idx));
}
else if (js_isboolean(state, idx))
{
json_node_init_boolean(node, js_toboolean(state, idx));
}
else if (js_isarray(state, idx))
{
length = js_getlength(state, idx);
array = json_array_new();
json_node_init_array(node, array);
for (i = 0; i < length; i++)
{
js_getindex(state, idx, i);
tmp = js_util_tojsonnode(state, -1);
if (tmp)
json_array_add_element(array, tmp);
js_pop(state, 1);
}
json_array_unref(array);
}
else if (js_isobject(state, idx))
{
object = json_object_new();
json_node_init_object(node, object);
js_pushiterator(state, idx, 1);
while((s = js_nextiterator(state, -1)) != NULL)
{
if (idx > 0) js_getproperty(state, idx, s);
else js_getproperty(state, idx - 1, s);
tmp = js_util_tojsonnode(state, -1);
if (tmp)
json_object_set_member(object, s, tmp);
js_pop(state, 1);
}
js_pop(state, 1);
json_object_unref(object);
}
else
{
json_node_free(node);
return NULL;
}
return node;
}
