rhai/src/packages/array_basic.rs

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#![cfg(not(feature = "no_index"))]
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#![allow(non_snake_case)]
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use crate::engine::OP_EQUALS;
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use crate::plugin::*;
use crate::{def_package, Array, Dynamic, EvalAltResult, FnPtr, NativeCallContext, Position, INT};
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#[cfg(feature = "no_std")]
use std::prelude::v1::*;
use std::{any::TypeId, cmp::Ordering, mem};
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def_package!(crate:BasicArrayPackage:"Basic array utilities.", lib, {
lib.standard = true;
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combine_with_exported_module!(lib, "array", array_functions);
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// Register array iterator
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lib.set_iterable::<Array>();
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});
#[export_module]
mod array_functions {
#[rhai_fn(name = "len", get = "len", pure)]
pub fn len(array: &mut Array) -> INT {
array.len() as INT
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}
#[rhai_fn(name = "push", name = "+=")]
pub fn push(array: &mut Array, item: Dynamic) {
array.push(item);
}
#[rhai_fn(name = "append", name = "+=")]
pub fn append(array: &mut Array, y: Array) {
if !y.is_empty() {
if array.is_empty() {
*array = y;
} else {
array.extend(y);
}
}
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}
#[rhai_fn(name = "+")]
pub fn concat(mut array: Array, y: Array) -> Array {
if !y.is_empty() {
if array.is_empty() {
array = y;
} else {
array.extend(y);
}
}
array
}
pub fn insert(array: &mut Array, position: INT, item: Dynamic) {
if array.is_empty() {
array.push(item);
} else if position < 0 {
if let Some(n) = position.checked_abs() {
if n as usize > array.len() {
array.insert(0, item);
} else {
array.insert(array.len() - n as usize, item);
}
} else {
array.insert(0, item);
}
} else if (position as usize) >= array.len() {
array.push(item);
} else {
array.insert(position as usize, item);
}
}
#[rhai_fn(return_raw)]
pub fn pad(
_ctx: NativeCallContext,
array: &mut Array,
len: INT,
item: Dynamic,
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) -> Result<(), Box<EvalAltResult>> {
if len <= 0 {
return Ok(());
}
// Check if array will be over max size limit
#[cfg(not(feature = "unchecked"))]
if _ctx.engine().max_array_size() > 0 && (len as usize) > _ctx.engine().max_array_size() {
return Err(EvalAltResult::ErrorDataTooLarge(
"Size of array".to_string(),
Position::NONE,
)
.into());
}
if len as usize > array.len() {
array.resize(len as usize, item);
}
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Ok(())
}
pub fn pop(array: &mut Array) -> Dynamic {
if array.is_empty() {
Dynamic::UNIT
} else {
array.pop().unwrap_or_else(|| Dynamic::UNIT)
}
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}
pub fn shift(array: &mut Array) -> Dynamic {
if array.is_empty() {
Dynamic::UNIT
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} else {
array.remove(0)
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}
}
pub fn remove(array: &mut Array, len: INT) -> Dynamic {
if len < 0 || (len as usize) >= array.len() {
Dynamic::UNIT
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} else {
array.remove(len as usize)
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}
}
pub fn clear(array: &mut Array) {
if !array.is_empty() {
array.clear();
}
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}
pub fn truncate(array: &mut Array, len: INT) {
if !array.is_empty() {
if len >= 0 {
array.truncate(len as usize);
} else {
array.clear();
}
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}
}
pub fn chop(array: &mut Array, len: INT) {
if !array.is_empty() && len as usize >= array.len() {
if len >= 0 {
array.drain(0..array.len() - len as usize);
} else {
array.clear();
}
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}
}
pub fn reverse(array: &mut Array) {
if !array.is_empty() {
array.reverse();
}
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}
pub fn splice(array: &mut Array, start: INT, len: INT, replace: Array) {
if array.is_empty() {
*array = replace;
return;
}
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let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
array.extend(replace.into_iter());
return;
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} else {
start as usize
};
let len = if len < 0 {
0
} else if len as usize > array.len() - start {
array.len() - start
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} else {
len as usize
};
array.splice(start..start + len, replace.into_iter());
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}
pub fn extract(array: &mut Array, start: INT, len: INT) -> Array {
if array.is_empty() || len <= 0 {
return Array::new();
}
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let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return Array::new();
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} else {
start as usize
};
let len = if len <= 0 {
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0
} else if len as usize > array.len() - start {
array.len() - start
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} else {
len as usize
};
if len == 0 {
Array::new()
} else {
array[start..start + len].to_vec()
}
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}
#[rhai_fn(name = "extract")]
pub fn extract_tail(array: &mut Array, start: INT) -> Array {
if array.is_empty() {
return Array::new();
}
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let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return Array::new();
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} else {
start as usize
};
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array[start..].to_vec()
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}
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#[rhai_fn(name = "split")]
pub fn split_at(array: &mut Array, start: INT) -> Array {
if array.is_empty() {
Array::new()
} else if start < 0 {
if let Some(n) = start.checked_abs() {
if n as usize > array.len() {
mem::take(array)
} else {
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let mut result = Array::new();
result.extend(array.drain(array.len() - n as usize..));
result
}
} else {
mem::take(array)
}
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} else if start as usize >= array.len() {
Array::new()
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} else {
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let mut result = Array::new();
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result.extend(array.drain(start as usize..));
result
}
}
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#[rhai_fn(return_raw, pure)]
pub fn map(
ctx: NativeCallContext,
array: &mut Array,
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mapper: FnPtr,
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) -> Result<Array, Box<EvalAltResult>> {
if array.is_empty() {
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return Ok(array.clone());
}
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let mut ar = Array::with_capacity(array.len());
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for (i, item) in array.iter().enumerate() {
ar.push(
mapper
.call_dynamic(&ctx, None, [item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
if fn_sig.starts_with(mapper.fn_name()) =>
{
mapper.call_dynamic(&ctx, None, [item.clone(), (i as INT).into()])
}
_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
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"map".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
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))
})?,
);
}
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Ok(ar)
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}
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#[rhai_fn(name = "map", return_raw, pure)]
pub fn map_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
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mapper: &str,
) -> Result<Array, Box<EvalAltResult>> {
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map(ctx, array, FnPtr::new(mapper)?)
}
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#[rhai_fn(return_raw, pure)]
pub fn filter(
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ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<Array, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(array.clone());
}
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let mut ar = Array::new();
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for (i, item) in array.iter().enumerate() {
if filter
.call_dynamic(&ctx, None, [item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
{
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filter.call_dynamic(&ctx, None, [item.clone(), (i as INT).into()])
}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"filter".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
ar.push(item.clone());
}
}
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Ok(ar)
}
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#[rhai_fn(name = "filter", return_raw, pure)]
pub fn filter_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
filter_func: &str,
) -> Result<Array, Box<EvalAltResult>> {
filter(ctx, array, FnPtr::new(filter_func)?)
}
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#[rhai_fn(return_raw, pure)]
pub fn contains(
ctx: NativeCallContext,
array: &mut Array,
value: Dynamic,
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) -> Result<bool, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(false);
}
for item in array.iter_mut() {
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if ctx
.call_fn_raw(OP_EQUALS, true, false, &mut [item, &mut value.clone()])
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.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(ref fn_sig, _)
if fn_sig.starts_with(OP_EQUALS) =>
{
if item.type_id() == value.type_id() {
// No default when comparing same type
Err(err)
} else {
Ok(Dynamic::FALSE)
}
}
_ => Err(err),
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(true);
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}
}
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Ok(false)
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}
#[rhai_fn(return_raw, pure)]
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pub fn index_of(
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ctx: NativeCallContext,
array: &mut Array,
value: Dynamic,
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) -> Result<INT, Box<EvalAltResult>> {
if array.is_empty() {
Ok(-1)
} else {
index_of_starting_from(ctx, array, value, 0)
}
}
#[rhai_fn(name = "index_of", return_raw, pure)]
pub fn index_of_starting_from(
ctx: NativeCallContext,
array: &mut Array,
value: Dynamic,
start: INT,
) -> Result<INT, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(-1);
}
let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return Ok(-1);
} else {
start as usize
};
for (i, item) in array.iter_mut().enumerate().skip(start) {
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if ctx
.call_fn_raw(OP_EQUALS, true, false, &mut [item, &mut value.clone()])
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.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(ref fn_sig, _)
if fn_sig.starts_with(OP_EQUALS) =>
{
if item.type_id() == value.type_id() {
// No default when comparing same type
Err(err)
} else {
Ok(Dynamic::FALSE)
}
}
_ => Err(err),
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(i as INT);
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}
}
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Ok(-1 as INT)
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}
#[rhai_fn(name = "index_of", return_raw, pure)]
pub fn index_of_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
filter: &str,
) -> Result<INT, Box<EvalAltResult>> {
index_of_filter(ctx, array, FnPtr::new(filter)?)
}
#[rhai_fn(name = "index_of", return_raw, pure)]
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pub fn index_of_filter(
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ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<INT, Box<EvalAltResult>> {
if array.is_empty() {
Ok(-1)
} else {
index_of_filter_starting_from(ctx, array, filter, 0)
}
}
#[rhai_fn(name = "index_of", return_raw, pure)]
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pub fn index_of_filter_starting_from(
ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
start: INT,
) -> Result<INT, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(-1);
}
let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return Ok(-1);
} else {
start as usize
};
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for (i, item) in array.iter().enumerate().skip(start) {
if filter
.call_dynamic(&ctx, None, [item.clone()])
.or_else(|err| match *err {
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EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
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{
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filter.call_dynamic(&ctx, None, [item.clone(), (i as INT).into()])
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}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"index_of".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(i as INT);
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}
}
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Ok(-1 as INT)
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}
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#[rhai_fn(name = "index_of", return_raw, pure)]
pub fn index_of_with_fn_name_filter_starting_from(
ctx: NativeCallContext,
array: &mut Array,
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filter: &str,
start: INT,
) -> Result<INT, Box<EvalAltResult>> {
index_of_filter_starting_from(ctx, array, FnPtr::new(filter)?, start)
}
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#[rhai_fn(return_raw, pure)]
pub fn some(
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ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<bool, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(false);
}
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for (i, item) in array.iter().enumerate() {
if filter
.call_dynamic(&ctx, None, [item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
{
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filter.call_dynamic(&ctx, None, [item.clone(), (i as INT).into()])
}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"some".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(true);
}
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}
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Ok(false)
}
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#[rhai_fn(name = "some", return_raw, pure)]
pub fn some_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
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filter: &str,
) -> Result<bool, Box<EvalAltResult>> {
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some(ctx, array, FnPtr::new(filter)?)
}
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#[rhai_fn(return_raw, pure)]
pub fn all(
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ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<bool, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(true);
}
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for (i, item) in array.iter().enumerate() {
if !filter
.call_dynamic(&ctx, None, [item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
{
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filter.call_dynamic(&ctx, None, [item.clone(), (i as INT).into()])
}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"all".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(false);
}
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}
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Ok(true)
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}
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#[rhai_fn(name = "all", return_raw, pure)]
pub fn all_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
filter: &str,
) -> Result<bool, Box<EvalAltResult>> {
all(ctx, array, FnPtr::new(filter)?)
}
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#[rhai_fn(return_raw)]
pub fn dedup(ctx: NativeCallContext, array: &mut Array) -> Result<(), Box<EvalAltResult>> {
dedup_with_fn_name(ctx, array, OP_EQUALS)
}
#[rhai_fn(name = "dedup", return_raw)]
pub fn dedup_by_comparer(
ctx: NativeCallContext,
array: &mut Array,
comparer: FnPtr,
) -> Result<(), Box<EvalAltResult>> {
if array.is_empty() {
return Ok(());
}
array.dedup_by(|x, y| {
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comparer
.call_dynamic(&ctx, None, [x.clone(), y.clone()])
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.unwrap_or_else(|_| Dynamic::FALSE)
.as_bool()
.unwrap_or(false)
});
Ok(())
}
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#[rhai_fn(name = "dedup", return_raw)]
fn dedup_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
comparer: &str,
) -> Result<(), Box<EvalAltResult>> {
dedup_by_comparer(ctx, array, FnPtr::new(comparer)?)
}
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#[rhai_fn(return_raw, pure)]
pub fn reduce(
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ctx: NativeCallContext,
array: &mut Array,
reducer: FnPtr,
) -> Result<Dynamic, Box<EvalAltResult>> {
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reduce_with_initial(ctx, array, reducer, Dynamic::UNIT)
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}
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#[rhai_fn(name = "reduce", return_raw, pure)]
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pub fn reduce_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
reducer: &str,
) -> Result<Dynamic, Box<EvalAltResult>> {
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reduce(ctx, array, FnPtr::new(reducer)?)
}
#[rhai_fn(name = "reduce", return_raw, pure)]
pub fn reduce_with_initial(
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ctx: NativeCallContext,
array: &mut Array,
reducer: FnPtr,
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initial: Dynamic,
) -> Result<Dynamic, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(initial);
}
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let mut result = initial;
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for (i, item) in array.iter().enumerate() {
let item = item.clone();
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result = reducer
.call_dynamic(&ctx, None, [result.clone(), item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(reducer.fn_name()) =>
{
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reducer.call_dynamic(&ctx, None, [result, item, (i as INT).into()])
}
_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"reduce".to_string(),
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ctx.source().unwrap_or("").to_string(),
err,
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Position::NONE,
))
})?;
}
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Ok(result)
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}
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#[rhai_fn(name = "reduce", return_raw, pure)]
pub fn reduce_with_fn_name_with_initial(
ctx: NativeCallContext,
array: &mut Array,
reducer: &str,
initial: Dynamic,
) -> Result<Dynamic, Box<EvalAltResult>> {
reduce_with_initial(ctx, array, FnPtr::new(reducer)?, initial)
}
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#[rhai_fn(return_raw, pure)]
pub fn reduce_rev(
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ctx: NativeCallContext,
array: &mut Array,
reducer: FnPtr,
) -> Result<Dynamic, Box<EvalAltResult>> {
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reduce_rev_with_initial(ctx, array, reducer, Dynamic::UNIT)
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}
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#[rhai_fn(name = "reduce_rev", return_raw, pure)]
pub fn reduce_rev_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
reducer: &str,
) -> Result<Dynamic, Box<EvalAltResult>> {
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reduce_rev(ctx, array, FnPtr::new(reducer)?)
}
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#[rhai_fn(name = "reduce_rev", return_raw, pure)]
pub fn reduce_rev_with_initial(
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ctx: NativeCallContext,
array: &mut Array,
reducer: FnPtr,
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initial: Dynamic,
) -> Result<Dynamic, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(initial);
}
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let mut result = initial;
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for (i, item) in array.iter().enumerate().rev() {
let item = item.clone();
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result = reducer
.call_dynamic(&ctx, None, [result.clone(), item.clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(reducer.fn_name()) =>
{
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reducer.call_dynamic(&ctx, None, [result, item, (i as INT).into()])
}
_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
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"reduce_rev".to_string(),
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ctx.source().unwrap_or("").to_string(),
err,
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Position::NONE,
))
})?;
}
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Ok(result)
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}
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#[rhai_fn(name = "reduce_rev", return_raw, pure)]
pub fn reduce_rev_with_fn_name_with_initial(
ctx: NativeCallContext,
array: &mut Array,
reducer: &str,
initial: Dynamic,
) -> Result<Dynamic, Box<EvalAltResult>> {
reduce_rev_with_initial(ctx, array, FnPtr::new(reducer)?, initial)
}
#[rhai_fn(name = "sort", return_raw)]
pub fn sort_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
comparer: &str,
) -> Result<(), Box<EvalAltResult>> {
sort(ctx, array, FnPtr::new(comparer)?)
}
#[rhai_fn(return_raw)]
pub fn sort(
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ctx: NativeCallContext,
array: &mut Array,
comparer: FnPtr,
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) -> Result<(), Box<EvalAltResult>> {
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if array.len() <= 1 {
return Ok(());
}
array.sort_by(|x, y| {
comparer
.call_dynamic(&ctx, None, [x.clone(), y.clone()])
.ok()
.and_then(|v| v.as_int().ok())
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.map(|v| match v {
v if v > 0 => Ordering::Greater,
v if v < 0 => Ordering::Less,
0 => Ordering::Equal,
_ => unreachable!(),
})
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.unwrap_or_else(|| x.type_id().cmp(&y.type_id()))
});
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Ok(())
}
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#[rhai_fn(name = "sort", return_raw)]
pub fn sort_with_builtin(array: &mut Array) -> Result<(), Box<EvalAltResult>> {
if array.len() <= 1 {
return Ok(());
}
let type_id = array[0].type_id();
if array.iter().any(|a| a.type_id() != type_id) {
return Err(EvalAltResult::ErrorFunctionNotFound(
"sort() cannot be called with elements of different types".into(),
Position::NONE,
)
.into());
}
if type_id == TypeId::of::<INT>() {
array.sort_by(|a, b| {
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let a = a.as_int().expect("`INT`");
let b = b.as_int().expect("`INT`");
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a.cmp(&b)
});
return Ok(());
}
if type_id == TypeId::of::<char>() {
array.sort_by(|a, b| {
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let a = a.as_char().expect("char");
let b = b.as_char().expect("char");
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a.cmp(&b)
});
return Ok(());
}
#[cfg(not(feature = "no_float"))]
if type_id == TypeId::of::<crate::FLOAT>() {
array.sort_by(|a, b| {
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let a = a.as_float().expect("`FLOAT`");
let b = b.as_float().expect("`FLOAT`");
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a.partial_cmp(&b).unwrap_or(Ordering::Equal)
});
return Ok(());
}
if type_id == TypeId::of::<ImmutableString>() {
array.sort_by(|a, b| {
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let a = a.read_lock::<ImmutableString>().expect("`ImmutableString`");
let b = b.read_lock::<ImmutableString>().expect("`ImmutableString`");
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a.as_str().cmp(b.as_str())
});
return Ok(());
}
#[cfg(feature = "decimal")]
if type_id == TypeId::of::<rust_decimal::Decimal>() {
array.sort_by(|a, b| {
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let a = a.as_decimal().expect("`Decimal`");
let b = b.as_decimal().expect("`Decimal`");
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a.cmp(&b)
});
return Ok(());
}
if type_id == TypeId::of::<bool>() {
array.sort_by(|a, b| {
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let a = a.as_bool().expect("`bool`");
let b = b.as_bool().expect("`bool`");
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a.cmp(&b)
});
return Ok(());
}
if type_id == TypeId::of::<()>() {
return Ok(());
}
Ok(())
}
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#[rhai_fn(return_raw)]
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pub fn drain(
ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<Array, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(Array::new());
}
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let mut drained = Array::with_capacity(array.len());
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let mut i = 0;
let mut x = 0;
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while x < array.len() {
if filter
.call_dynamic(&ctx, None, [array[x].clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
{
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filter.call_dynamic(&ctx, None, [array[x].clone(), (i as INT).into()])
}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"drain".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
drained.push(array.remove(x));
} else {
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x += 1;
}
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i += 1;
}
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Ok(drained)
}
#[rhai_fn(name = "drain", return_raw)]
pub fn drain_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
filter: &str,
) -> Result<Array, Box<EvalAltResult>> {
drain(ctx, array, FnPtr::new(filter)?)
}
#[rhai_fn(name = "drain")]
pub fn drain_range(array: &mut Array, start: INT, len: INT) -> Array {
if array.is_empty() || len <= 0 {
return Array::new();
}
let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return Array::new();
} else {
start as usize
};
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let len = if len <= 0 {
0
} else if len as usize > array.len() - start {
array.len() - start
} else {
len as usize
};
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array.drain(start..start + len).collect()
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}
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#[rhai_fn(return_raw)]
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pub fn retain(
ctx: NativeCallContext,
array: &mut Array,
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filter: FnPtr,
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) -> Result<Array, Box<EvalAltResult>> {
if array.is_empty() {
return Ok(Array::new());
}
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let mut drained = Array::new();
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let mut i = 0;
let mut x = 0;
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while x < array.len() {
if !filter
.call_dynamic(&ctx, None, [array[x].clone()])
.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(fn_sig, _)
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if fn_sig.starts_with(filter.fn_name()) =>
{
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filter.call_dynamic(&ctx, None, [array[x].clone(), (i as INT).into()])
}
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_ => Err(err),
})
.map_err(|err| {
Box::new(EvalAltResult::ErrorInFunctionCall(
"retain".to_string(),
ctx.source().unwrap_or("").to_string(),
err,
Position::NONE,
))
})?
.as_bool()
.unwrap_or(false)
{
drained.push(array.remove(x));
} else {
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x += 1;
}
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i += 1;
}
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Ok(drained)
}
#[rhai_fn(name = "retain", return_raw)]
pub fn retain_with_fn_name(
ctx: NativeCallContext,
array: &mut Array,
filter: &str,
) -> Result<Array, Box<EvalAltResult>> {
retain(ctx, array, FnPtr::new(filter)?)
}
#[rhai_fn(name = "retain")]
pub fn retain_range(array: &mut Array, start: INT, len: INT) -> Array {
if array.is_empty() || len <= 0 {
return Array::new();
}
let start = if start < 0 {
let arr_len = array.len();
start
.checked_abs()
.map_or(0, |n| arr_len - (n as usize).min(arr_len))
} else if start as usize >= array.len() {
return mem::take(array);
} else {
start as usize
};
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let len = if len < 0 {
0
} else if len as usize > array.len() - start {
array.len() - start
} else {
len as usize
};
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let mut drained: Array = array.drain(..start).collect();
drained.extend(array.drain(len..));
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drained
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}
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#[rhai_fn(name = "==", return_raw, pure)]
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pub fn equals(
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ctx: NativeCallContext,
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array1: &mut Array,
array2: Array,
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) -> Result<bool, Box<EvalAltResult>> {
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if array1.len() != array2.len() {
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return Ok(false);
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}
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if array1.is_empty() {
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return Ok(true);
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}
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let mut array2 = array2;
for (a1, a2) in array1.iter_mut().zip(array2.iter_mut()) {
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if !ctx
.call_fn_raw(OP_EQUALS, true, false, &mut [a1, a2])
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.or_else(|err| match *err {
EvalAltResult::ErrorFunctionNotFound(ref fn_sig, _)
if fn_sig.starts_with(OP_EQUALS) =>
{
if a1.type_id() == a2.type_id() {
// No default when comparing same type
Err(err)
} else {
Ok(Dynamic::FALSE)
}
}
_ => Err(err),
})?
.as_bool()
.unwrap_or(false)
{
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return Ok(false);
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}
}
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Ok(true)
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}
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#[rhai_fn(name = "!=", return_raw, pure)]
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pub fn not_equals(
ctx: NativeCallContext,
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array1: &mut Array,
array2: Array,
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) -> Result<bool, Box<EvalAltResult>> {
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equals(ctx, array1, array2).map(|r| !r)
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}
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}