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v/vlib/builtin/int.v

444 lines
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V

// Copyright (c) 2019-2020 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
/*
// old function for reference
pub fn (nn int) str1() string {
mut n := nn
if n == 0 {
return '0'
}
max := 16
mut buf := vcalloc(max + 1)
mut len := 0
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
// Fill the string from the end
for n > 0 {
d := n % 10
buf[max - len - 1] = d + int(`0`)
len++
n = n / 10
}
// Prepend - if it's negative
if is_neg {
buf[max - len - 1] = `-`
len++
}
buf[max] = `\0`
return tos(buf + max - len, len)
}
*/
// ----- value to string functions -----
/*
// old function for reference
pub fn ptr_str(ptr voidptr) string {
buf := malloc(sizeof(double) * 5 + 1) // TODO
C.sprintf((buf), '%p', ptr)
return tos(buf, vstrlen(buf))
}
*/
pub fn ptr_str(ptr voidptr) string {
buf1 := u64(ptr).hex()
return buf1
}
const(
digit_pairs = "00102030405060708090011121314151617181910212223242526272829203132333435363738393041424344454647484940515253545556575859506162636465666768696071727374757677787970818283848586878889809192939495969798999"
)
// This implementation is the quickest with gcc -O2
[inline]
pub fn (nn int) str_l(max int) string {
mut n := nn
mut d := 0
if n == 0 {
return '0'
}
mut buf := malloc(max + 1)
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
mut index := max
unsafe {
buf[index--] = `\0`
}
for n > 0 {
n1 := n / 100
d = ((n - (n1 * 100)) << 1)
n = n1
unsafe {
buf[index--] = digit_pairs.str[d++]
buf[index--] = digit_pairs.str[d]
}
}
index++
// remove head zero
if d < 20 {
index++
}
// Prepend - if it's negative
if is_neg {
index--
unsafe {
buf[index] = `-`
}
}
unsafe {
C.memmove(buf,buf+index, (max-index)+1 )
return tos(buf, (max-index))
}
//return tos(buf + index, (max-index))
}
pub fn (n i8) str() string {
return int(n).str_l(5)
}
pub fn (n i16) str() string {
return int(n).str_l(7)
}
pub fn (n u16) str() string {
return int(n).str_l(7)
}
pub fn (n int) str() string {
return n.str_l(12)
}
pub fn (nn u32) str() string {
mut n := nn
mut d := u32(0)
if n == 0 {
return '0'
}
max := 12
mut buf := malloc(max + 1)
mut index := max
unsafe {
buf[index--] = `\0`
}
for n > 0 {
n1 := n / u32(100)
d = ((n - (n1 * u32(100))) << u32(1))
n = n1
unsafe {
buf[index--] = digit_pairs[d++]
buf[index--] = digit_pairs[d]
}
}
index++
// remove head zero
if d < u32(20) {
index++
}
unsafe {
C.memmove(buf,buf+index, (max-index)+1 )
return tos(buf, (max-index))
}
//return tos(buf + index, (max-index))
}
[inline]
pub fn (n any_int) str() string {
return i64(n).str()
}
pub fn (nn i64) str() string {
mut n := nn
mut d := i64(0)
if n == 0 {
return '0'
}
max := 20
mut buf := vcalloc(max + 1)
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
mut index := max
unsafe {
buf[index--] = `\0`
}
for n > 0 {
n1 := n / i64(100)
d = ((n - (n1 * i64(100))) << i64(1))
n = n1
unsafe {
buf[index--] = digit_pairs[d++]
buf[index--] = digit_pairs[d]
}
}
index++
// remove head zero
if d < i64(20) {
index++
}
// Prepend - if it's negative
if is_neg {
index--
unsafe {
buf[index] = `-`
}
}
unsafe {
C.memmove(buf,buf+index, (max-index)+1 )
return tos(buf, (max-index))
}
//return tos(buf + index, (max-index))
}
pub fn (nn u64) str() string {
mut n := nn
mut d := u64(0)
if n == 0 {
return '0'
}
max := 20
mut buf := vcalloc(max + 1)
mut index := max
unsafe {
buf[index--] = `\0`
}
for n > 0 {
n1 := n / 100
d = ((n - (n1 * 100)) << 1)
n = n1
unsafe {
buf[index--] = digit_pairs[d++]
buf[index--] = digit_pairs[d]
}
}
index++
// remove head zero
if d < 20 {
index++
}
unsafe {
C.memmove(buf,buf+index, (max-index)+1 )
return tos(buf, (max-index))
}
//return tos(buf + index, (max-index))
}
pub fn (b bool) str() string {
if b {
return 'true'
}
return 'false'
}
// ----- value to hex string functions -----
/*
//old function for reference
pub fn (n int) hex1() string {
len := if n >= 0 { n.str().len + 3 } else { 11 }
hex := malloc(len) // 0x + \n
count := C.sprintf((hex), '0x%x', n)
return tos(hex, count)
}
*/
[inline]
fn u64_to_hex(nn u64, len byte) string {
mut n := nn
mut buf := [256]byte
buf[len] = `\0`
mut i := 0
for i=len-1; i>=0; i-- {
d := byte(n & 0xF)
x := if d < 10 { d + `0` } else { d + 87 }
buf[i] = x
n = n >> 4
}
return string{
str: memdup(buf, len + 1)
len: len
}
}
[inline]
fn u64_to_hex_no_leading_zeros(nn u64, len byte) string {
mut n := nn
mut buf := [256]byte
buf[len] = `\0`
mut i := 0
for i=len-1; i>=0; i-- {
d := byte(n & 0xF)
x := if d < 10 { d + `0` } else { d + 87 }
buf[i] = x
n = n >> 4
if n == 0 {
break
}
}
res_len := len - i
return string{
str: memdup(&buf[i], res_len + 1)
len: res_len
}
}
pub fn (nn byte) hex() string {
if nn == 0 {
return '00'
}
return u64_to_hex(nn, 2)
}
pub fn (nn i8) hex() string {
return byte(nn).hex()
}
pub fn (nn u16) hex() string {
if nn == 0 {
return '0'
}
return u64_to_hex_no_leading_zeros(nn, 4)
}
pub fn (nn i16) hex() string {
return u16(nn).hex()
}
pub fn (nn u32) hex() string {
if nn == 0 {
return '0'
}
return u64_to_hex_no_leading_zeros(nn, 8)
}
pub fn (nn int) hex() string {
return u32(nn).hex()
}
pub fn (n int) hex2() string {
return '0x' + n.hex()
}
pub fn (nn u64) hex() string {
if nn == 0 {
return '0'
}
return u64_to_hex_no_leading_zeros(nn, 16)
}
pub fn (nn i64) hex() string {
return u64(nn).hex()
}
pub fn (nn any_int) hex() string {
return u64(nn).hex()
}
pub fn (nn voidptr) str() string {
return u64(nn).hex()
}
pub fn (nn byteptr) str() string {
return u64(nn).hex()
}
// ----- utilities functions -----
/*
pub fn (c rune) str() string {
fst_byte := int(c)>>8 * 3 & 0xff
len := utf8_char_len(fst_byte)
mut str := string{
len: len
str: malloc(len + 1)
}
for i in 0..len {
str.str[i] = int(c)>>8 * (3 - i) & 0xff
}
str.str[len] = `\0`
return str
}
*/
pub fn (c byte) str() string {
mut str := string{
str: malloc(2)
len: 1
}
unsafe {
str.str[0] = c
str.str[1] = `\0`
}
return str
}
pub fn (c byte) is_capital() bool {
return c >= `A` && c <= `Z`
}
pub fn (b []byte) clone() []byte {
mut res := []byte{len: b.len}
//mut res := make([]byte, {repeat:b.len})
for i in 0..b.len {
res[i] = b[i]
}
return res
}
// TODO generic
pub fn (a []byte) contains(val byte) bool {
for aa in a {
if aa == val {
return true
}
}
return false
}
// TODO generic
fn (ar []int) contains(val int) bool {
for s in ar {
if s == val {
return true
}
}
return false
}
// TODO generic
pub fn (a []u64) contains(val u64) bool {
for aa in a {
if aa == val {
return true
}
}
return false
}