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/*
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
typedef enum {
NXT_TSTR_CONST = 0,
NXT_TSTR_VAR,
#if (NXT_HAVE_NJS)
NXT_TSTR_JS,
#endif
} nxt_tstr_type_t;
struct nxt_tstr_s {
nxt_str_t str;
union {
nxt_var_t *var;
#if (NXT_HAVE_NJS)
nxt_js_t *js;
#endif
} u;
nxt_tstr_flags_t flags;
nxt_tstr_type_t type;
};
struct nxt_tstr_query_s {
nxt_mp_t *pool;
nxt_tstr_state_t *state;
nxt_tstr_cache_t *cache;
void *ctx;
void *data;
};
#define nxt_tstr_is_js(str) \
nxt_strchr_start(str, '`')
nxt_tstr_state_t *
nxt_tstr_state_new(nxt_mp_t *mp, nxt_bool_t test)
{
nxt_tstr_state_t *state;
state = nxt_mp_get(mp, sizeof(nxt_tstr_state_t));
if (nxt_slow_path(state == NULL)) {
return NULL;
}
state->pool = mp;
state->test = test;
state->var_refs = nxt_array_create(mp, 4, sizeof(nxt_var_ref_t));
if (nxt_slow_path(state->var_refs == NULL)) {
return NULL;
}
#if (NXT_HAVE_NJS)
state->jcf = nxt_js_conf_new(mp, test);
if (nxt_slow_path(state->jcf == NULL)) {
return NULL;
}
#endif
return state;
}
nxt_tstr_t *
nxt_tstr_compile(nxt_tstr_state_t *state, const nxt_str_t *str,
nxt_tstr_flags_t flags)
{
u_char *p;
nxt_tstr_t *tstr;
nxt_bool_t strz;
strz = (flags & NXT_TSTR_STRZ) != 0;
tstr = nxt_mp_get(state->pool, sizeof(nxt_tstr_t));
if (nxt_slow_path(tstr == NULL)) {
return NULL;
}
tstr->str.length = str->length + strz;
tstr->str.start = nxt_mp_nget(state->pool, tstr->str.length);
if (nxt_slow_path(tstr->str.start == NULL)) {
return NULL;
}
p = nxt_cpymem(tstr->str.start, str->start, str->length);
if (strz) {
*p = '\0';
}
tstr->flags = flags;
if (nxt_tstr_is_js(str)) {
#if (NXT_HAVE_NJS)
nxt_str_t tpl;
tstr->type = NXT_TSTR_JS;
nxt_tstr_str(tstr, &tpl);
tstr->u.js = nxt_js_add_tpl(state->jcf, &tpl, strz);
if (nxt_slow_path(tstr->u.js == NULL)) {
return NULL;
}
#endif
} else {
p = memchr(str->start, '$', str->length);
if (p != NULL) {
tstr->type = NXT_TSTR_VAR;
tstr->u.var = nxt_var_compile(state, &tstr->str);
if (nxt_slow_path(tstr->u.var == NULL)) {
return NULL;
}
} else {
tstr->type = NXT_TSTR_CONST;
}
}
return tstr;
}
nxt_int_t
nxt_tstr_test(nxt_tstr_state_t *state, nxt_str_t *str, u_char *error)
{
u_char *p;
if (nxt_tstr_is_js(str)) {
#if (NXT_HAVE_NJS)
return nxt_js_test(state->jcf, str, error);
#else
nxt_sprintf(error, error + NXT_MAX_ERROR_STR,
"Unit is built without support of njs: "
"\"--njs\" ./configure option is missing.%Z");
return NXT_ERROR;
#endif
} else {
p = memchr(str->start, '$', str->length);
if (p != NULL) {
return nxt_var_test(state, str, error);
}
}
return NXT_OK;
}
nxt_int_t
nxt_tstr_state_done(nxt_tstr_state_t *state, u_char *error)
{
#if (NXT_HAVE_NJS)
if (!state->test) {
nxt_int_t ret;
ret = nxt_js_compile(state->jcf);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
}
#endif
return NXT_OK;
}
void
nxt_tstr_state_release(nxt_tstr_state_t *state)
{
#if (NXT_HAVE_NJS)
nxt_js_conf_release(state->jcf);
#endif
}
nxt_int_t
nxt_tstr_cond_compile(nxt_tstr_state_t *state, nxt_str_t *str,
nxt_tstr_cond_t *cond)
{
if (str->length > 0 && str->start[0] == '!') {
cond->negate = 1;
str->start++;
str->length--;
}
cond->expr = nxt_tstr_compile(state, str, 0);
if (nxt_slow_path(cond->expr == NULL)) {
return NXT_ERROR;
}
return NXT_OK;
}
nxt_bool_t
nxt_tstr_is_const(nxt_tstr_t *tstr)
{
return (tstr->type == NXT_TSTR_CONST);
}
void
nxt_tstr_str(nxt_tstr_t *tstr, nxt_str_t *str)
{
*str = tstr->str;
if (tstr->flags & NXT_TSTR_STRZ) {
str->length--;
}
}
nxt_int_t
nxt_tstr_query_init(nxt_tstr_query_t **query_p, nxt_tstr_state_t *state,
nxt_tstr_cache_t *cache, void *ctx, nxt_mp_t *mp)
{
nxt_tstr_query_t *query;
query = *query_p;
if (*query_p == NULL) {
query = nxt_mp_zget(mp, sizeof(nxt_tstr_query_t));
if (nxt_slow_path(query == NULL)) {
return NXT_ERROR;
}
}
query->pool = mp;
query->state = state;
query->cache = cache;
query->ctx = ctx;
*query_p = query;
return NXT_OK;
}
nxt_int_t
nxt_tstr_query(nxt_task_t *task, nxt_tstr_query_t *query, nxt_tstr_t *tstr,
nxt_str_t *val)
{
nxt_int_t ret;
if (nxt_tstr_is_const(tstr)) {
nxt_tstr_str(tstr, val);
return NXT_OK;
}
if (tstr->type == NXT_TSTR_VAR) {
ret = nxt_var_interpreter(task, query->state, &query->cache->var,
tstr->u.var, val, query->ctx,
tstr->flags & NXT_TSTR_LOGGING);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
} else {
#if (NXT_HAVE_NJS)
ret = nxt_js_call(task, query->state->jcf, &query->cache->js,
tstr->u.js, val, query->ctx);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ERROR;
}
#endif
}
if (tstr->flags & NXT_TSTR_STRZ) {
val->length--;
}
#if (NXT_DEBUG)
nxt_str_t str;
nxt_tstr_str(tstr, &str);
nxt_debug(task, "tstr query: \"%V\", result: \"%V\"", &str, val);
#endif
return NXT_OK;
}
void
nxt_tstr_query_release(nxt_tstr_query_t *query)
{
#if (NXT_HAVE_NJS)
nxt_js_release(&query->cache->js);
#endif
}
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