mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
402 lines
8.0 KiB
V
402 lines
8.0 KiB
V
// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
|
|
// Use of this source code is governed by an MIT license
|
|
// that can be found in the LICENSE file.
|
|
|
|
module builtin
|
|
|
|
import strings
|
|
|
|
struct array {
|
|
pub:
|
|
// Using a void pointer allows to implement arrays without generics and without generating
|
|
// extra code for every type.
|
|
data voidptr
|
|
len int
|
|
cap int
|
|
element_size int
|
|
}
|
|
|
|
// Private function, used by V (`nums := []int`)
|
|
pub fn new_array(mylen, cap, elm_size int) array {
|
|
arr := array {
|
|
len: mylen
|
|
cap: cap
|
|
element_size: elm_size
|
|
data: calloc(cap * elm_size)
|
|
}
|
|
return arr
|
|
}
|
|
|
|
|
|
// TODO
|
|
pub fn make(len, cap, elm_size int) array {
|
|
return new_array(len, cap, elm_size)
|
|
}
|
|
|
|
|
|
// Private function, used by V (`nums := [1, 2, 3]`)
|
|
fn new_array_from_c_array(len, cap, elm_size int, c_array voidptr) array {
|
|
arr := array {
|
|
len: len
|
|
cap: cap
|
|
element_size: elm_size
|
|
data: calloc(cap * elm_size)
|
|
}
|
|
// TODO Write all memory functions (like memcpy) in V
|
|
C.memcpy(arr.data, c_array, len * elm_size)
|
|
return arr
|
|
}
|
|
|
|
// Private function, used by V (`nums := [1, 2, 3] !`)
|
|
fn new_array_from_c_array_no_alloc(len, cap, elm_size int, c_array voidptr) array {
|
|
arr := array {
|
|
len: len
|
|
cap: cap
|
|
element_size: elm_size
|
|
data: c_array
|
|
}
|
|
return arr
|
|
}
|
|
|
|
// Private function, used by V (`[0; 100]`)
|
|
fn array_repeat_old(val voidptr, nr_repeats, elm_size int) array {
|
|
arr := array {
|
|
len: nr_repeats
|
|
cap: nr_repeats
|
|
element_size: elm_size
|
|
data: calloc(nr_repeats * elm_size)
|
|
}
|
|
for i := 0; i < nr_repeats; i++ {
|
|
C.memcpy(arr.data + i * elm_size, val, elm_size)
|
|
}
|
|
return arr
|
|
}
|
|
|
|
pub fn (a array) repeat(nr_repeats int) array {
|
|
arr := array {
|
|
len: nr_repeats
|
|
cap: nr_repeats
|
|
element_size: a.element_size
|
|
data: calloc(nr_repeats * a.element_size)
|
|
}
|
|
val := a.data + 0 //nr_repeats * a.element_size
|
|
for i := 0; i < nr_repeats; i++ {
|
|
C.memcpy(arr.data + i * a.element_size, val, a.element_size)
|
|
}
|
|
return arr
|
|
}
|
|
|
|
pub fn (a mut array) sort_with_compare(compare voidptr) {
|
|
C.qsort(a.data, a.len, a.element_size, compare)
|
|
}
|
|
|
|
pub fn (a mut array) insert(i int, val voidptr) {
|
|
if i >= a.len {
|
|
panic('array.insert: index larger than length')
|
|
}
|
|
a.push(val)
|
|
size := a.element_size
|
|
C.memmove(a.data + (i + 1) * size, a.data + i * size, (a.len - i) * size)
|
|
a.set(i, val)
|
|
}
|
|
|
|
pub fn (a mut array) prepend(val voidptr) {
|
|
a.insert(0, val)
|
|
}
|
|
|
|
pub fn (a mut array) delete(idx int) {
|
|
size := a.element_size
|
|
C.memmove(a.data + idx * size, a.data + (idx + 1) * size, (a.len - idx) * size)
|
|
a.len--
|
|
a.cap--
|
|
}
|
|
|
|
fn (a array) get(i int) voidptr {
|
|
if i < 0 || i >= a.len {
|
|
panic('array index out of range: $i/$a.len')
|
|
}
|
|
return a.data + i * a.element_size
|
|
}
|
|
|
|
pub fn (a array) first() voidptr {
|
|
if a.len == 0 {
|
|
panic('array.first: empty array')
|
|
}
|
|
return a.data + 0
|
|
}
|
|
|
|
pub fn (a array) last() voidptr {
|
|
if a.len == 0 {
|
|
panic('array.last: empty array')
|
|
}
|
|
return a.data + (a.len - 1) * a.element_size
|
|
}
|
|
|
|
pub fn (s array) left(n int) array {
|
|
if n >= s.len {
|
|
return s
|
|
}
|
|
return s.slice(0, n)
|
|
}
|
|
|
|
pub fn (s array) right(n int) array {
|
|
if n >= s.len {
|
|
return new_array(0, 0, s.element_size)
|
|
}
|
|
return s.slice(n, s.len)
|
|
}
|
|
|
|
// used internally for [2..4]
|
|
fn (s array) slice2(start, _end int, end_max bool) array {
|
|
end := if end_max { s.len } else { _end }
|
|
return s.slice(start, end)
|
|
}
|
|
|
|
pub fn (s array) slice(start, _end int) array {
|
|
mut end := _end
|
|
if start > end {
|
|
panic('invalid slice index: $start > $end')
|
|
}
|
|
if end > s.len {
|
|
panic('runtime error: slice bounds out of range ($end >= $s.len)')
|
|
}
|
|
if start < 0 {
|
|
panic('runtime error: slice bounds out of range ($start < 0)')
|
|
}
|
|
l := end - start
|
|
res := array {
|
|
element_size: s.element_size
|
|
data: s.data + start * s.element_size
|
|
len: l
|
|
cap: l
|
|
//is_slice: true
|
|
}
|
|
return res
|
|
}
|
|
|
|
fn (a mut array) set(idx int, val voidptr) {
|
|
if idx < 0 || idx >= a.len {
|
|
panic('array index out of range: $idx / $a.len')
|
|
}
|
|
C.memcpy(a.data + a.element_size * idx, val, a.element_size)
|
|
}
|
|
|
|
fn (arr mut array) push(val voidptr) {
|
|
if arr.len >= arr.cap - 1 {
|
|
cap := (arr.len + 1) * 2
|
|
// println('_push: realloc, new cap=$cap')
|
|
if arr.cap == 0 {
|
|
arr.data = calloc(cap * arr.element_size)
|
|
}
|
|
else {
|
|
arr.data = C.realloc(arr.data, cap * arr.element_size)
|
|
}
|
|
arr.cap = cap
|
|
}
|
|
C.memcpy(arr.data + arr.element_size * arr.len, val, arr.element_size)
|
|
arr.len++
|
|
}
|
|
|
|
// `val` is array.data
|
|
// TODO make private, right now it's used by strings.Builder
|
|
pub fn (arr mut array) push_many(val voidptr, size int) {
|
|
if arr.len >= arr.cap - size {
|
|
cap := (arr.len + size) * 2
|
|
// println('_push: realloc, new cap=$cap')
|
|
if arr.cap == 0 {
|
|
arr.data = calloc(cap * arr.element_size)
|
|
}
|
|
else {
|
|
arr.data = C.realloc(arr.data, cap * arr.element_size)
|
|
}
|
|
arr.cap = cap
|
|
}
|
|
C.memcpy(arr.data + arr.element_size * arr.len, val, arr.element_size * size)
|
|
arr.len += size
|
|
}
|
|
|
|
pub fn (a array) reverse() array {
|
|
arr := array {
|
|
len: a.len
|
|
cap: a.cap
|
|
element_size: a.element_size
|
|
data: calloc(a.cap * a.element_size)
|
|
}
|
|
for i := 0; i < a.len; i++ {
|
|
C.memcpy(arr.data + i * arr.element_size, &a[a.len-1-i], arr.element_size)
|
|
}
|
|
return arr
|
|
}
|
|
|
|
pub fn (a array) clone() array {
|
|
arr := array {
|
|
len: a.len
|
|
cap: a.cap
|
|
element_size: a.element_size
|
|
data: calloc(a.cap * a.element_size)
|
|
}
|
|
C.memcpy(arr.data, a.data, a.cap * a.element_size)
|
|
return arr
|
|
}
|
|
|
|
//pub fn (a []int) free() {
|
|
[unsafe_fn]
|
|
pub fn (a array) free() {
|
|
//if a.is_slice {
|
|
//return
|
|
//}
|
|
C.free(a.data)
|
|
}
|
|
|
|
// "[ 'a', 'b', 'c' ]"
|
|
pub fn (a []string) str() string {
|
|
mut sb := strings.new_builder(a.len * 3)
|
|
sb.write('[')
|
|
for i := 0; i < a.len; i++ {
|
|
val := a[i]
|
|
sb.write('"')
|
|
sb.write(val)
|
|
sb.write('"')
|
|
if i < a.len - 1 {
|
|
sb.write(', ')
|
|
}
|
|
}
|
|
sb.write(']')
|
|
return sb.str()
|
|
}
|
|
|
|
// "[true, true, false]"
|
|
pub fn (a []bool) str() string {
|
|
mut sb := strings.new_builder(a.len * 3)
|
|
sb.write('[')
|
|
for i := 0; i < a.len; i++ {
|
|
val := a[i]
|
|
if val {
|
|
sb.write('true')
|
|
} else {
|
|
sb.write('false')
|
|
}
|
|
if i < a.len - 1 {
|
|
sb.write(', ')
|
|
}
|
|
}
|
|
sb.write(']')
|
|
return sb.str()
|
|
}
|
|
|
|
pub fn (b []byte) hex() string {
|
|
mut hex := malloc(b.len*2+1)
|
|
mut ptr := &hex[0]
|
|
for i := 0; i < b.len ; i++ {
|
|
ptr += C.sprintf(*char(ptr), '%02x', b[i])
|
|
}
|
|
return string(hex)
|
|
}
|
|
|
|
// TODO: implement for all types
|
|
pub fn copy(dst, src []byte) int {
|
|
if dst.len > 0 && src.len > 0 {
|
|
min := if dst.len < src.len { dst.len } else { src.len }
|
|
C.memcpy(dst.data, src.left(min).data, dst.element_size*min)
|
|
return min
|
|
}
|
|
return 0
|
|
}
|
|
|
|
fn compare_ints(a, b &int) int {
|
|
if a < b {
|
|
return -1
|
|
}
|
|
if a > b {
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
pub fn (a mut []int) sort() {
|
|
a.sort_with_compare(compare_ints)
|
|
}
|
|
|
|
// Looking for an array index based on value.
|
|
// If there is, it will return the index and if not, it will return `-1`
|
|
pub fn (a []string) index(v string) int {
|
|
for i := 0; i < a.len; i++ {
|
|
if a[i] == v {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (a []int) index(v int) int {
|
|
for i := 0; i < a.len; i++ {
|
|
if a[i] == v {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (a []byte) index(v byte) int {
|
|
for i := 0; i < a.len; i++ {
|
|
if a[i] == v {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
pub fn (a []char) index(v char) int {
|
|
for i := 0; i < a.len; i++ {
|
|
if a[i] == v {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
// Executes a reducer function (that you provide) on each element of the array,
|
|
// resulting in a single output value.
|
|
pub fn (a []int) reduce(iter fn (accum, curr int) int, accum_start int) int {
|
|
mut _accum := 0
|
|
_accum = accum_start
|
|
for i := 0; i < a.len; i++ {
|
|
_accum = iter(_accum, a[i])
|
|
}
|
|
return _accum
|
|
}
|
|
|
|
// []int == []int (also for: i64, f32, f64, byte, string)
|
|
fn array_eq<T>(a1, a2 []T) bool {
|
|
if a1.len != a2.len {
|
|
return false
|
|
}
|
|
for i := 0; i < a1.len; i++ {
|
|
if a1[i] != a2[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
pub fn (a []int) eq(a2 []int) bool {
|
|
return array_eq(a, a2)
|
|
}
|
|
|
|
pub fn (a []i64) eq(a2 []i64) bool {
|
|
return array_eq(a, a2)
|
|
}
|
|
|
|
pub fn (a []string) eq(a2 []string) bool {
|
|
return array_eq(a, a2)
|
|
}
|
|
|
|
pub fn (a []byte) eq(a2 []byte) bool {
|
|
return array_eq(a, a2)
|
|
}
|
|
|
|
pub fn (a []f32) eq(a2 []f32) bool {
|
|
return array_eq(a, a2)
|
|
}
|
|
|