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/*
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
struct nxt_js_s {
uint32_t index;
njs_vm_t *vm;
};
struct nxt_js_conf_s {
nxt_mp_t *pool;
njs_vm_t *vm;
nxt_array_t *funcs;
};
nxt_js_conf_t *
nxt_js_conf_new(nxt_mp_t *mp)
{
njs_vm_opt_t opts;
nxt_js_conf_t *jcf;
jcf = nxt_mp_zget(mp, sizeof(nxt_js_conf_t));
if (nxt_slow_path(jcf == NULL)) {
return NULL;
}
jcf->pool = mp;
njs_vm_opt_init(&opts);
jcf->vm = njs_vm_create(&opts);
if (nxt_slow_path(jcf->vm == NULL)) {
return NULL;
}
jcf->funcs = nxt_array_create(mp, 4, sizeof(nxt_str_t));
if (nxt_slow_path(jcf->funcs == NULL)) {
return NULL;
}
return jcf;
}
nxt_js_t *
nxt_js_add_tpl(nxt_js_conf_t *jcf, nxt_str_t *str, nxt_bool_t strz)
{
size_t size;
u_char *p, *start;
nxt_js_t *js;
nxt_str_t *func;
static nxt_str_t func_str = nxt_string("function() {"
" return ");
/*
* Appending a terminating null character if strz is true.
*/
static nxt_str_t strz_str = nxt_string(" + '\\x00'");
size = func_str.length + str->length + 1;
if (strz) {
size += strz_str.length;
}
start = nxt_mp_nget(jcf->pool, size);
if (nxt_slow_path(start == NULL)) {
return NULL;
}
p = start;
p = nxt_cpymem(p, func_str.start, func_str.length);
p = nxt_cpymem(p, str->start, str->length);
if (strz) {
p = nxt_cpymem(p, strz_str.start, strz_str.length);
}
*p++ = '}';
js = nxt_mp_get(jcf->pool, sizeof(nxt_js_t));
if (nxt_slow_path(js == NULL)) {
return NULL;
}
js->vm = jcf->vm;
func = nxt_array_add(jcf->funcs);
if (nxt_slow_path(func == NULL)) {
return NULL;
}
func->start = start;
func->length = p - start;
js->index = jcf->funcs->nelts - 1;
return js;
}
nxt_int_t
nxt_js_compile(nxt_js_conf_t *jcf)
{
size_t size;
u_char *p, *start;
njs_int_t ret;
nxt_str_t *func;
nxt_uint_t i;
size = 2;
func = jcf->funcs->elts;
for (i = 0; i < jcf->funcs->nelts; i++) {
size += func[i].length + 1;
}
start = nxt_mp_nget(jcf->pool, size);
if (nxt_slow_path(start == NULL)) {
return NXT_ERROR;
}
p = start;
*p++ = '[';
func = jcf->funcs->elts;
for (i = 0; i < jcf->funcs->nelts; i++) {
p = nxt_cpymem(p, func[i].start, func[i].length);
*p++ = ',';
}
*p++ = ']';
ret = njs_vm_compile(jcf->vm, &start, p);
return (ret == NJS_OK) ? NXT_OK : NXT_ERROR;
}
nxt_int_t
nxt_js_test(nxt_js_conf_t *jcf, nxt_str_t *str, u_char *error)
{
u_char *start;
nxt_str_t err;
njs_int_t ret;
njs_str_t res;
start = nxt_mp_nget(jcf->pool, str->length);
if (nxt_slow_path(start == NULL)) {
return NXT_ERROR;
}
nxt_memcpy(start, str->start, str->length);
ret = njs_vm_compile(jcf->vm, &start, start + str->length);
if (nxt_slow_path(ret != NJS_OK)) {
(void) njs_vm_retval_string(jcf->vm, &res);
err.start = res.start;
err.length = res.length;
nxt_sprintf(error, error + NXT_MAX_ERROR_STR, "\"%V\"%Z", &err);
return NXT_ERROR;
}
return NXT_OK;
}
nxt_int_t
nxt_js_call(nxt_task_t *task, nxt_js_cache_t *cache, nxt_js_t *js,
nxt_str_t *str, void *ctx)
{
njs_vm_t *vm;
njs_int_t rc, ret;
njs_str_t res;
njs_value_t *array, *value;
njs_function_t *func;
njs_opaque_value_t opaque_value;
vm = cache->vm;
if (vm == NULL) {
vm = njs_vm_clone(js->vm, ctx);
if (nxt_slow_path(vm == NULL)) {
return NXT_ERROR;
}
ret = njs_vm_start(vm);
if (ret != NJS_OK) {
return NXT_ERROR;
}
array = njs_vm_retval(vm);
cache->vm = vm;
cache->array = *array;
}
value = njs_vm_array_prop(vm, &cache->array, js->index, &opaque_value);
func = njs_value_function(value);
ret = njs_vm_call(vm, func, NULL, 0);
rc = njs_vm_retval_string(vm, &res);
if (rc != NJS_OK) {
return NXT_ERROR;
}
if (ret != NJS_OK) {
nxt_alert(task, "js exception: %V", &res);
return NXT_ERROR;
}
str->length = res.length;
str->start = res.start;
return NXT_OK;
}
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