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extern crate unicode_segmentation;
use crate::vmbindings::value::Value;
use crate::vmbindings::vm::Vm;
use crate::vmbindings::vmerror::VmError;
use std::borrow::Borrow;
use unicode_segmentation::UnicodeSegmentation;
pub extern "C" fn constructor(cvm: *mut Vm, nargs: u16) {
let vm = unsafe { &mut *cvm };
if nargs == 0 {
vm.stack
.push(Value::Str(vm.malloc(String::new().into())).wrap());
return;
} else if nargs == 1 {
let arg = unsafe { vm.stack.pop().unwrap().unwrap() };
vm.stack
.push(Value::Str(vm.malloc(format!("{}", arg).to_string().into())).wrap());
} else {
vm.error = VmError::ERROR_MISMATCH_ARGUMENTS;
vm.error_expected = 1;
}
}
#[hana_function()]
fn length(s: Value::Str) -> Value {
Value::Int(s.as_ref().graphemes(true).count() as i64)
}
#[hana_function()]
fn bytesize(s: Value::Str) -> Value {
Value::Int(s.as_ref().len() as i64)
}
#[hana_function()]
fn startswith(s: Value::Str, left: Value::Str) -> Value {
let s = s.as_ref().borrow() as &String;
Value::Int(s.starts_with(left.as_ref().borrow() as &String) as i64)
}
#[hana_function()]
fn endswith(s: Value::Str, left: Value::Str) -> Value {
let s = s.as_ref().borrow() as &String;
Value::Int(s.ends_with(left.as_ref().borrow() as &String) as i64)
}
#[hana_function()]
fn delete(s: Value::Str, from_pos: Value::Int, nchars: Value::Int) -> Value {
let from_pos = from_pos as usize;
let ss = s
.as_ref()
.graphemes(true)
.enumerate()
.filter_map(|(i, ch)| {
if nchars == -1 {
if i >= from_pos {
None
} else {
Some(ch)
}
} else if (from_pos..(from_pos + nchars as usize)).contains(&i) {
None
} else {
Some(ch)
}
})
.collect::<String>();
Value::Str(vm.malloc(ss.into()))
}
#[hana_function()]
fn delete_(s: Value::Str, from_pos: Value::Int, nchars: Value::Int) -> Value {
let from_pos = from_pos as usize;
let it = s.as_ref().grapheme_indices(true).skip(from_pos);
if let Some((i, _)) = it.clone().take(1).next() {
if nchars == -1 {
s.as_mut().truncate(i);
} else if let Some((j, _)) = it.skip(nchars as usize).take(1).next() {
s.as_mut().replace_range(i..j, "");
} else {
s.as_mut().remove(i);
}
}
Value::Str(s)
}
#[hana_function()]
fn copy(s: Value::Str, from_pos: Value::Int, nchars: Value::Int) -> Value {
let from_pos = from_pos as usize;
let ss = s
.as_ref()
.graphemes(true)
.enumerate()
.filter_map(|(i, ch)| {
if nchars == -1 {
if i >= from_pos {
Some(ch)
} else {
None
}
} else if (from_pos..(from_pos + nchars as usize)).contains(&i) {
Some(ch)
} else {
None
}
})
.collect::<String>();
Value::Str(vm.malloc(ss.into()))
}
#[hana_function()]
fn insert_(dst: Value::Str, from_pos: Value::Int, src: Value::Str) -> Value {
let from_pos = from_pos as usize;
if let Some((i, _)) = dst.as_ref().grapheme_indices(true).skip(from_pos).next() {
dst.as_mut().insert_str(i, src.as_ref().as_str());
}
Value::Str(dst)
}
#[hana_function()]
fn split(s: Value::Str, delim: Value::Str) -> Value {
let array = vm.malloc(Vec::new());
let s = s.as_ref().borrow() as &String;
for ss in s.split(delim.as_ref().borrow() as &String) {
array
.as_mut()
.push(Value::Str(vm.malloc(ss.clone().to_string().into())).wrap());
}
Value::Array(array)
}
#[hana_function()]
fn index(s: Value::Str, needle: Value::Str) -> Value {
let s: &String = s.as_ref().borrow();
match s.find(needle.as_ref().borrow() as &String) {
Some(x) => Value::Int({
let mut idx_grapheme = 0;
if let Some(_) = s
.grapheme_indices(true)
.filter(|(i, _)| {
idx_grapheme += 1;
*i == x
})
.next()
{
(idx_grapheme - 1) as i64
} else {
-1
}
}),
None => Value::Int(-1),
}
}
#[hana_function()]
fn chars(s: Value::Str) -> Value {
let array = vm.malloc(Vec::new());
let array_ref = array.as_mut();
for ch in s.as_ref().graphemes(true) {
array_ref.push(Value::Str(vm.malloc(ch.to_string().into())).wrap());
}
Value::Array(array)
}
#[hana_function()]
fn ord(s: Value::Str) -> Value {
let s = s.as_ref();
if let Some(ch) = s.chars().next() {
Value::Int(ch as i64)
} else {
Value::Int(0)
}
}