Add FFI for query building

This commit is contained in:
Emily Toop 2018-04-05 11:21:48 +01:00
parent ca412b3a8b
commit a63b423aa9
3 changed files with 558 additions and 38 deletions

View file

@ -3,5 +3,8 @@ name = "mentat_ffi"
version = "0.1.0"
authors = ["Emily Toop <etoop@mozilla.com>"]
[dependencies]
libc = "0.2"
[dependencies.mentat]
path = ".."

View file

@ -8,6 +8,7 @@
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
extern crate libc;
extern crate mentat;
use std::collections::{
@ -16,23 +17,33 @@ use std::collections::{
use std::os::raw::{
c_char,
c_int,
c_void,
};
use std::slice;
use std::sync::{
Arc,
};
use std::vec;
use libc::time_t;
pub use mentat::{
Entid,
FindSpec,
HasSchema,
KnownEntid,
NamespacedKeyword,
Queryable,
QueryBuilder,
QueryInputs,
QueryOutput,
QueryResults,
Store,
Syncable,
TypedValue,
TxObserver,
};
pub use mentat::errors::{
Result,
Uuid,
ValueType,
Variable,
};
pub mod android;
@ -40,12 +51,11 @@ pub mod utils;
pub use utils::strings::{
c_char_to_string,
c_char_from_rc,
kw_from_string,
string_to_c_char,
str_to_c_char,
};
use utils::log;
#[repr(C)]
#[derive(Debug, Clone)]
pub struct ExternTxReport {
@ -62,21 +72,39 @@ pub struct ExternTxReportList {
}
#[repr(C)]
pub struct ExternResult {
pub error: *const c_char,
#[derive(Debug)]
pub struct ExternOption {
pub value: *mut c_void,
}
impl From<Result<()>> for ExternResult {
fn from(result: Result<()>) -> Self {
impl<T> From<Option<T>> for ExternOption {
fn from(option: Option<T>) -> Self {
ExternOption {
value: option.map_or(std::ptr::null_mut(), |v| Box::into_raw(Box::new(v)) as *mut _ as *mut c_void)
}
}
}
#[repr(C)]
#[derive(Debug)]
pub struct ExternResult {
pub ok: *const c_void,
pub err: *const c_char,
}
impl<T, E> From<Result<T, E>> for ExternResult where E: std::error::Error {
fn from(result: Result<T, E>) -> Self {
match result {
Ok(_) => {
Ok(value) => {
ExternResult {
error: std::ptr::null(),
err: std::ptr::null(),
ok: Box::into_raw(Box::new(value)) as *const _ as *const c_void,
}
},
Err(e) => {
ExternResult {
error: string_to_c_char(e.description().into())
err: string_to_c_char(e.description()),
ok: std::ptr::null(),
}
}
}
@ -85,7 +113,7 @@ impl From<Result<()>> for ExternResult {
// A store cannot be opened twice to the same location.
// Once created, the reference to the store is held by the caller and not Rust,
// therefore the caller is responsible for calling `store_destroy` to release the memory
// therefore the caller is responsible for calling `destroy` to release the memory
// used by the Store in order to avoid a memory leak.
// TODO: Start returning `ExternResult`s rather than crashing on error.
#[no_mangle]
@ -95,10 +123,364 @@ pub extern "C" fn store_open(uri: *const c_char) -> *mut Store {
Box::into_raw(Box::new(store))
}
// Reclaim the memory for the provided Store and drop, therefore releasing it.
// TODO: open empty
// TODO: dismantle
// TODO: conn
// TODO: begin_read
// TODO: begin_transaction
// TODO: cache
// TODO: q_once
#[no_mangle]
pub unsafe extern "C" fn store_destroy(store: *mut Store) {
let _ = Box::from_raw(store);
pub unsafe extern "C" fn store_query<'a>(store: *mut Store, query: *const c_char) -> *mut QueryBuilder<'a> {
let query = c_char_to_string(query);
let store = &mut*store;
let query_builder = QueryBuilder::new(store, query);
Box::into_raw(Box::new(query_builder))
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_int(query_builder: *mut QueryBuilder, var: *const c_char, value: c_int) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
let value = value as i32;
query_builder.bind_value(&var, value);
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_long(query_builder: *mut QueryBuilder, var: *const c_char, value: i64) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
query_builder.bind_long(&var, value);
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_ref(query_builder: *mut QueryBuilder, var: *const c_char, value: i64) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
query_builder.bind_ref(&var, value);
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_ref_kw(query_builder: *mut QueryBuilder, var: *const c_char, value: *const c_char) {
let var = c_char_to_string(var);
let kw = kw_from_string(c_char_to_string(value));
let query_builder = &mut*query_builder;
if let Some(err) = query_builder.bind_ref_from_kw(&var, kw).err() {
panic!(err);
}
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_kw(query_builder: *mut QueryBuilder, var: *const c_char, value: *const c_char) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
let kw = kw_from_string(c_char_to_string(value));
query_builder.bind_value(&var, kw);
}
// boolean
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_boolean(query_builder: *mut QueryBuilder, var: *const c_char, value: bool) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
query_builder.bind_value(&var, value);
}
// double
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_double(query_builder: *mut QueryBuilder, var: *const c_char, value: f64) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
query_builder.bind_value(&var, value);
}
// instant
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_timestamp(query_builder: *mut QueryBuilder, var: *const c_char, value: time_t) {
let var = c_char_to_string(var);
let query_builder = &mut*query_builder;
query_builder.bind_instant(&var, value as i64);
}
// string
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_string(query_builder: *mut QueryBuilder, var: *const c_char, value: *const c_char) {
let var = c_char_to_string(var);
let value = c_char_to_string(value);
let query_builder = &mut*query_builder;
query_builder.bind_value(&var, value);
}
// uuid
#[no_mangle]
pub unsafe extern "C" fn query_builder_bind_uuid(query_builder: *mut QueryBuilder, var: *const c_char, value: *const c_char) {
let var = c_char_to_string(var);
let value = Uuid::parse_str(&c_char_to_string(value)).expect("valid uuid");
let query_builder = &mut*query_builder;
query_builder.bind_value(&var, value);
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_execute_scalar(query_builder: *mut QueryBuilder) -> *mut ExternResult {
let query_builder = &mut*query_builder;
let results = query_builder.execute_scalar();
Box::into_raw(Box::new(results.into()))
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_execute_coll(query_builder: *mut QueryBuilder) -> *mut ExternResult {
let query_builder = &mut*query_builder;
let results = query_builder.execute_coll();
Box::into_raw(Box::new(results.into()))
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_execute_tuple(query_builder: *mut QueryBuilder) -> *mut ExternResult {
let query_builder = &mut*query_builder;
let results = query_builder.execute_tuple();
Box::into_raw(Box::new(results.into()))
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_execute(query_builder: *mut QueryBuilder) -> *mut ExternResult {
let query_builder = &mut*query_builder;
let results = query_builder.execute_rel();
Box::into_raw(Box::new(results.into()))
}
// as_long
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_long(typed_value: *mut TypedValue) -> i64 {
let typed_value = Box::from_raw(typed_value);
typed_value.into_long().expect("Typed value cannot be coerced into a Long")
}
// as_entid
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_entid(typed_value: *mut TypedValue) -> Entid {
let typed_value = Box::from_raw(typed_value);
typed_value.into_entid().expect("Typed value cannot be coerced into an Entid")
}
// kw
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_kw(typed_value: *mut TypedValue) -> *const c_char {
let typed_value = Box::from_raw(typed_value);
string_to_c_char(typed_value.into_kw().expect("Typed value cannot be coerced into a Namespaced Keyword").to_string())
}
//as_boolean
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_boolean(typed_value: *mut TypedValue) -> bool {
let typed_value = Box::from_raw(typed_value);
typed_value.into_boolean().expect("Typed value cannot be coerced into a Boolean")
}
//as_double
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_double(typed_value: *mut TypedValue) -> f64 {
let typed_value = Box::from_raw(typed_value);
typed_value.into_double().expect("Typed value cannot be coerced into a Double")
}
//as_timestamp
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_timestamp(typed_value: *mut TypedValue) -> i64 {
let typed_value = Box::from_raw(typed_value);
let val = typed_value.into_timestamp().expect("Typed value cannot be coerced into a Timestamp");
val
}
//as_string
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_string(typed_value: *mut TypedValue) -> *const c_char {
let typed_value = Box::from_raw(typed_value);
c_char_from_rc(typed_value.into_string().expect("Typed value cannot be coerced into a String"))
}
//as_uuid
#[no_mangle]
pub unsafe extern "C" fn typed_value_as_uuid(typed_value: *mut TypedValue) -> *const c_char {
let typed_value = Box::from_raw(typed_value);
string_to_c_char(typed_value.into_uuid_string().expect("Typed value cannot be coerced into a Uuid"))
}
#[no_mangle]
pub unsafe extern "C" fn row_at_index(rows: *mut Vec<Vec<TypedValue>>, index: c_int) -> *mut Vec<TypedValue> {
let result = &*rows;
result.get(index as usize).map_or(std::ptr::null_mut(), |v| Box::into_raw(Box::new(v.clone())))
}
#[no_mangle]
pub unsafe extern "C" fn rows_iter(rows: *mut Vec<Vec<TypedValue>>) -> *mut vec::IntoIter<Vec<TypedValue>> {
let result = Box::from_raw(rows);
Box::into_raw(Box::new(result.into_iter()))
}
#[no_mangle]
pub unsafe extern "C" fn rows_iter_next(iter: *mut ::std::vec::IntoIter<Vec<TypedValue>>) -> *mut Vec<TypedValue> {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| Box::into_raw(Box::new(v)))
}
#[no_mangle]
pub unsafe extern "C" fn values_iter(values: *mut Vec<TypedValue>) -> *mut vec::IntoIter<TypedValue> {
let result = Box::from_raw(values);
Box::into_raw(Box::new(result.into_iter()))
}
#[no_mangle]
pub unsafe extern "C" fn values_iter_next(iter: *mut vec::IntoIter<TypedValue>) -> *const TypedValue {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| &v as *const TypedValue)
}
//as_long
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_long(iter: *mut vec::IntoIter<TypedValue>) -> *const i64 {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| &v.into_long().expect("Typed value cannot be coerced into a Long") as *const i64)
}
// as ref
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_entid(iter: *mut vec::IntoIter<TypedValue>) -> *const Entid {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| &v.into_entid().expect("Typed value cannot be coerced into am Entid") as *const Entid)
}
// as kw
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_kw(iter: *mut vec::IntoIter<TypedValue>) -> *const c_char {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| string_to_c_char(v.into_kw().expect("Typed value cannot be coerced into a Namespaced Keyword").to_string()))
}
//as_boolean
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_boolean(iter: *mut vec::IntoIter<TypedValue>) -> *const bool {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| &v.into_boolean().expect("Typed value cannot be coerced into a Boolean") as *const bool)
}
//as_double
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_double(iter: *mut vec::IntoIter<TypedValue>) -> *const f64 {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| &v.into_double().expect("Typed value cannot be coerced into a Double") as *const f64)
}
//as_timestamp
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_timestamp(iter: *mut vec::IntoIter<TypedValue>) -> *const i64 {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| v.into_timestamp().expect("Typed value cannot be coerced into a Timestamp") as *const i64)
}
//as_string
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_string(iter: *mut vec::IntoIter<TypedValue>) -> *const c_char {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| c_char_from_rc(v.into_string().expect("Typed value cannot be coerced into a String")))
}
//as_uuid
#[no_mangle]
pub unsafe extern "C" fn values_iter_next_as_uuid(iter: *mut vec::IntoIter<TypedValue>) -> *const c_char {
let iter = &mut *iter;
iter.next().map_or(std::ptr::null_mut(), |v| string_to_c_char(v.into_uuid_string().expect("Typed value cannot be coerced into a Uuid")))
}
#[no_mangle]
pub unsafe extern "C" fn value_at_index(values: *mut Vec<TypedValue>, index: c_int) -> *const TypedValue {
let result = &*values;
result.get(index as usize).expect("No value at index") as *const TypedValue
}
//as_long
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_long(values: *mut Vec<TypedValue>, index: c_int) -> i64 {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
value.clone().into_long().expect("Typed value cannot be coerced into a Long")
}
// as ref
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_entid(values: *mut Vec<TypedValue>, index: c_int) -> Entid {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
value.clone().into_entid().expect("Typed value cannot be coerced into an Entid")
}
// as kw
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_kw(values: *mut Vec<TypedValue>, index: c_int) -> *const c_char {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
string_to_c_char(value.clone().into_kw().expect("Typed value cannot be coerced into a Namespaced Keyword").to_string())
}
//as_boolean
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_boolean(values: *mut Vec<TypedValue>, index: c_int) -> bool {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
value.clone().into_boolean().expect("Typed value cannot be coerced into a Boolean")
}
//as_double
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_double(values: *mut Vec<TypedValue>, index: c_int) -> f64 {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
value.clone().into_double().expect("Typed value cannot be coerced into a Double")
}
//as_timestamp
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_timestamp(values: *mut Vec<TypedValue>, index: c_int) -> i64 {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
value.clone().into_timestamp().expect("Typed value cannot be coerced into a timestamp")
}
//as_string
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_string(values: *mut Vec<TypedValue>, index: c_int) -> *mut c_char {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
c_char_from_rc(value.clone().into_string().expect("Typed value cannot be coerced into a String"))
}
//as_uuid
#[no_mangle]
pub unsafe extern "C" fn value_at_index_as_uuid(values: *mut Vec<TypedValue>, index: c_int) -> *mut c_char {
let result = &*values;
let value = result.get(index as usize).expect("No value at index");
string_to_c_char(value.clone().into_uuid_string().expect("Typed value cannot be coerced into a Uuid"))
}
// TODO: q_prepare
// TODO: q_explain
// TODO: lookup_values_for_attribute
#[no_mangle]
pub unsafe extern "C" fn store_value_for_attribute(store: *mut Store, entid: i64, attribute: *const c_char) -> *mut ExternResult {
let store = &*store;
let kw = kw_from_string(c_char_to_string(attribute));
let value = match store.lookup_value_for_attribute(entid, &kw) {
Ok(Some(v)) => ExternResult { ok: Box::into_raw(Box::new(v)) as *const _ as *const c_void, err: std::ptr::null() },
Ok(None) => ExternResult { ok: std::ptr::null(), err: std::ptr::null() },
Err(e) => ExternResult { ok: std::ptr::null(), err: string_to_c_char(e.description()) },
};
Box::into_raw(Box::new(value))
}
#[no_mangle]
@ -113,7 +495,6 @@ pub unsafe extern "C" fn store_register_observer(store: *mut Store,
attribute_set.extend(slice.iter());
let key = c_char_to_string(key);
let tx_observer = Arc::new(TxObserver::new(attribute_set, move |obs_key, batch| {
log::d(&format!("Calling observer registered for {:?}, batch: {:?}", obs_key, batch));
let extern_reports: Vec<ExternTxReport> = batch.into_iter().map(|(tx_id, changes)| {
let changes: Vec<Entid> = changes.into_iter().map(|i|*i).collect();
let len = changes.len();
@ -128,7 +509,7 @@ pub unsafe extern "C" fn store_register_observer(store: *mut Store,
reports: extern_reports.into_boxed_slice(),
len: len,
};
callback(str_to_c_char(obs_key), &reports);
callback(string_to_c_char(obs_key), &reports);
}));
store.register_observer(key, tx_observer);
}
@ -137,22 +518,17 @@ pub unsafe extern "C" fn store_register_observer(store: *mut Store,
pub unsafe extern "C" fn store_unregister_observer(store: *mut Store, key: *const c_char) {
let store = &mut*store;
let key = c_char_to_string(key);
log::d(&format!("Unregistering observer for key: {:?}", key));
store.unregister_observer(&key);
}
#[no_mangle]
pub unsafe extern "C" fn store_entid_for_attribute(store: *mut Store, attr: *const c_char) -> Entid {
let store = &mut*store;
let mut keyword_string = c_char_to_string(attr);
let attr_name = keyword_string.split_off(1);
let parts: Vec<&str> = attr_name.split("/").collect();
let kw = NamespacedKeyword::new(parts[0], parts[1]);
let keyword_string = c_char_to_string(attr);
let kw = kw_from_string(keyword_string);
let conn = store.conn();
let current_schema = conn.current_schema();
let got_entid = current_schema.get_entid(&kw);
let entid = got_entid.unwrap();
entid.into()
current_schema.get_entid(&kw).expect("Unable to find entid for invalid attribute").into()
}
#[no_mangle]
@ -178,3 +554,131 @@ pub unsafe extern "C" fn store_sync(store: *mut Store, user_uuid: *const c_char,
let res = store.sync(&server_uri, &user_uuid);
Box::into_raw(Box::new(res.into()))
}
fn add_value_for_attribute<E, V>(store: &mut Store, entid: E, attribute: String, value: V) -> *mut ExternResult
where E: Into<KnownEntid>,
V: Into<TypedValue> {
let kw = kw_from_string(attribute);
let res = store.add_value_for_attribute(entid.into(), kw, value.into());
Box::into_raw(Box::new(res.into()))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_long_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: i64) -> *mut ExternResult {
let store = &mut*store;
let kw = kw_from_string(c_char_to_string(attribute));
let res = store.add_value_for_attribute(KnownEntid(entid), kw, TypedValue::Long(value));
Box::into_raw(Box::new(res.into()))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_entid_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: Entid) -> *mut ExternResult {
let store = &mut*store;
let kw = kw_from_string(c_char_to_string(attribute));
let res = store.add_value_for_attribute(KnownEntid(entid), kw, TypedValue::Ref(value));
Box::into_raw(Box::new(res.into()))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_kw_ref_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: *const c_char) -> *mut ExternResult {
let store = &mut*store;
let kw = kw_from_string(c_char_to_string(attribute));
let value = kw_from_string(c_char_to_string(value));
let is_valid = store.conn().current_schema().get_entid(&value);
if is_valid.is_none() {
return Box::into_raw(Box::new(ExternResult { ok: std::ptr::null_mut(), err: string_to_c_char(format!("Unknown attribute {:?}", value)) }));
}
let kw_entid = is_valid.unwrap();
let res = store.add_value_for_attribute(KnownEntid(entid), kw, TypedValue::Ref(kw_entid.into()));
Box::into_raw(Box::new(res.into()))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_boolean_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: bool) -> *mut ExternResult {
let store = &mut*store;
add_value_for_attribute(store, KnownEntid(entid), c_char_to_string(attribute), value)
}
#[no_mangle]
pub unsafe extern "C" fn store_set_double_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: f64) -> *mut ExternResult {
let store = &mut*store;
add_value_for_attribute(store, KnownEntid(entid), c_char_to_string(attribute), value)
}
#[no_mangle]
pub unsafe extern "C" fn store_set_timestamp_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: time_t) -> *mut ExternResult {
let store = &mut*store;
let kw = kw_from_string(c_char_to_string(attribute));
let res = store.add_value_for_attribute(KnownEntid(entid), kw, TypedValue::instant(value as i64));
Box::into_raw(Box::new(res.into()))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_string_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: *const c_char) -> *mut ExternResult {
let store = &mut*store;
add_value_for_attribute(store, KnownEntid(entid), c_char_to_string(attribute), c_char_to_string(value))
}
#[no_mangle]
pub unsafe extern "C" fn store_set_uuid_for_attribute_on_entid(store: *mut Store, entid: Entid, attribute: *const c_char, value: *const c_char) -> *mut ExternResult {
let store = &mut*store;
let uuid = Uuid::parse_str(&c_char_to_string(value)).expect("valid uuid");
add_value_for_attribute(store, KnownEntid(entid), c_char_to_string(attribute), uuid)
}
#[no_mangle]
pub unsafe extern "C" fn destroy(obj: *mut c_void) {
if !obj.is_null() {
let obj_to_release = Box::from_raw(obj);
println!("object to release {:?}", obj_to_release);
}
}
#[no_mangle]
pub unsafe extern "C" fn query_builder_destroy(obj: *mut QueryBuilder) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn store_destroy(obj: *mut Store) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn typed_value_destroy(obj: *mut TypedValue) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn typed_value_list_destroy(obj: *mut Vec<TypedValue>) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn typed_value_list_iter_destroy(obj: *mut vec::IntoIter<TypedValue>) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn typed_value_result_set_destroy(obj: *mut Vec<Vec<TypedValue>>) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}
#[no_mangle]
pub unsafe extern "C" fn typed_value_result_set_iter_destroy(obj: *mut vec::IntoIter<Vec<TypedValue>>) {
if !obj.is_null() {
let _ = Box::from_raw(obj);
}
}

View file

@ -9,27 +9,40 @@
// specific language governing permissions and limitations under the License.
pub mod strings {
use std::os::raw::c_char;
use std;
use std::ffi::{
CString,
CStr
};
use std::os::raw::c_char;
use std::rc::Rc;
use mentat::{
NamespacedKeyword,
};
pub fn c_char_to_string(cchar: *const c_char) -> String {
let c_str = unsafe { CStr::from_ptr(cchar) };
let r_str = match c_str.to_str() {
Err(_) => "",
Ok(string) => string,
};
let r_str = c_str.to_str().unwrap_or("");
r_str.to_string()
}
pub fn string_to_c_char(r_string: String) -> *mut c_char {
CString::new(r_string).unwrap().into_raw()
pub fn string_to_c_char<T>(r_string: T) -> *mut c_char where T: Into<String> {
CString::new(r_string.into()).unwrap().into_raw()
}
pub fn str_to_c_char(r_string: &str) -> *mut c_char {
string_to_c_char(r_string.to_string())
pub fn kw_from_string(mut keyword_string: String) -> NamespacedKeyword {
let attr_name = keyword_string.split_off(1);
let parts: Vec<&str> = attr_name.split("/").collect();
NamespacedKeyword::new(parts[0], parts[1])
}
pub fn c_char_from_rc(rc_string: Rc<String>) -> *mut c_char {
if let Some(str_ptr) = unsafe { Rc::into_raw(rc_string).as_ref() } {
string_to_c_char(str_ptr.clone())
} else {
std::ptr::null_mut()
}
}
}
@ -55,6 +68,6 @@ pub mod log {
let message = message.as_ptr();
let tag = CString::new("Mentat").unwrap();
let tag = tag.as_ptr();
unsafe { android::__android_log_write(android::ANDROID_LOG_DEBUG, tag, message) };
unsafe { android::__android_log_write(android::LogLevel::Debug as i32, tag, message) };
}
}