builtin: clean up int.v (#9960)

pull/9969/head
penguindark 2021-05-02 15:31:29 +02:00 committed by GitHub
parent 4b818fa2be
commit dbadda84e5
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 126 additions and 168 deletions

View File

@ -3,51 +3,13 @@
// that can be found in the LICENSE file.
module builtin
// Alias until native supported
type u8 = byte
/*
// 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))
}
*/
//
// ----- value to string functions -----
//
// ptr_str returns the address of `ptr` as a `string`.
pub fn ptr_str(ptr voidptr) string {
buf1 := u64(ptr).hex()
@ -59,58 +21,67 @@ pub fn (cptr &char) str() string {
}
const (
// digit pairs in reverse order
digit_pairs = '00102030405060708090011121314151617181910212223242526272829203132333435363738393041424344454647484940515253545556575859506162636465666768696071727374757677787970818283848586878889809192939495969798999'
)
// This implementation is the quickest with gcc -O2
// str_l returns the string representation of the integer `max`.
[inline]
// str_l returns the string representation of the integer nn with max chars.
[inline] [direct_array_access]
fn (nn int) str_l(max int) string {
mut n := i64(nn)
mut d := 0
if n == 0 {
return '0'
}
mut buf := unsafe { malloc(max + 1) }
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
mut index := max
unsafe {
mut n := i64(nn)
mut d := 0
if n == 0 {
return '0'
}
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
mut index := max
mut buf := malloc(max + 1)
buf[index] = 0
index--
}
for n > 0 {
n1 := int(n / 100)
d = ((int(n) - (n1 * 100)) << 1)
n = n1
unsafe {
for n > 0 {
n1 := int(n / 100)
// calculate the digit_pairs start index
d = ((int(n) - (n1 * 100)) << 1)
n = n1
buf[index] = digit_pairs.str[d]
index--
d++
buf[index] = digit_pairs.str[d]
index--
}
}
index++
// remove head zero
if d < 20 {
index++
}
// Prepend - if it's negative
if is_neg {
index--
unsafe {
// remove head zero
if d < 20 {
index++
}
// Prepend - if it's negative
if is_neg {
index--
buf[index] = `-`
}
diff := max - index
C.memmove(buf, buf + index, diff + 1)
/*
// === manual memory move for bare metal ===
mut c:= 0
for c < diff {
buf[c] = buf[c+index]
c++
}
buf[c] = 0
*/
return tos(buf, diff)
//return tos(memdup(&buf[0] + index, (max - index)), (max - index))
}
unsafe {
C.memmove(buf, buf + index, (max - index) + 1)
return tos(buf, (max - index))
}
// return tos(buf + index, (max-index))
}
// str returns the value of the `i8` as a `string`.
@ -139,41 +110,40 @@ pub fn (n int) str() string {
// str returns the value of the `u32` as a `string`.
// Example: assert u32(20000).str() == '20000'
[inline] [direct_array_access]
pub fn (nn u32) str() string {
mut n := nn
mut d := u32(0)
if n == 0 {
return '0'
}
max := 12
mut buf := unsafe { malloc(max + 1) }
mut index := max
unsafe {
mut n := nn
mut d := u32(0)
if n == 0 {
return '0'
}
max := 12
mut buf := malloc(max + 1)
mut index := max
buf[index] = 0
index--
}
for n > 0 {
n1 := n / u32(100)
d = ((n - (n1 * u32(100))) << u32(1))
n = n1
unsafe {
for n > 0 {
n1 := n / u32(100)
d = ((n - (n1 * u32(100))) << u32(1))
n = n1
buf[index] = digit_pairs[d]
index--
d++
buf[index] = digit_pairs[d]
index--
}
}
index++
// remove head zero
if d < u32(20) {
index++
// remove head zero
if d < u32(20) {
index++
}
diff := max - index
C.memmove(buf, buf + index, diff + 1)
return tos(buf, diff)
//return tos(memdup(&buf[0] + index, (max - index)), (max - index))
}
unsafe {
C.memmove(buf, buf + index, (max - index) + 1)
return tos(buf, (max - index))
}
// return tos(buf + index, (max-index))
}
// str returns the value of the `int_literal` as a `string`.
@ -184,92 +154,86 @@ pub fn (n int_literal) str() string {
// str returns the value of the `i64` as a `string`.
// Example: assert i64(-200000).str() == '-200000'
[inline] [direct_array_access]
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 {
mut n := nn
mut d := i64(0)
if n == 0 {
return '0'
}
max := 20
mut buf := malloc(max + 1)
mut is_neg := false
if n < 0 {
n = -n
is_neg = true
}
mut index := max
buf[index] = 0
index--
}
for n > 0 {
n1 := n / i64(100)
d = ((n - (n1 * i64(100))) << i64(1))
n = n1
unsafe {
for n > 0 {
n1 := n / i64(100)
d = ((n - (n1 * i64(100))) << i64(1))
n = n1
buf[index] = digit_pairs[d]
index--
d++
buf[index] = digit_pairs[d]
index--
}
}
index++
// remove head zero
if d < i64(20) {
index++
}
// Prepend - if it's negative
if is_neg {
index--
unsafe {
// remove head zero
if d < i64(20) {
index++
}
// Prepend - if it's negative
if is_neg {
index--
buf[index] = `-`
}
diff := max - index
C.memmove(buf, buf + index, diff + 1)
return tos(buf, diff)
//return tos(memdup(&buf[0] + index, (max - index)), (max - index))
}
unsafe {
C.memmove(buf, buf + index, (max - index) + 1)
return tos(buf, (max - index))
}
// return tos(buf + index, (max-index))
}
// str returns the value of the `u64` as a `string`.
// Example: assert u64(2000000).str() == '2000000'
[inline] [direct_array_access]
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 {
mut n := nn
mut d := u64(0)
if n == 0 {
return '0'
}
max := 20
mut buf := malloc(max + 1)
mut index := max
buf[index] = 0
index--
}
for n > 0 {
n1 := n / 100
d = ((n - (n1 * 100)) << 1)
n = n1
unsafe {
for n > 0 {
n1 := n / 100
d = ((n - (n1 * 100)) << 1)
n = n1
buf[index] = digit_pairs[d]
index--
d++
buf[index] = digit_pairs[d]
index--
}
}
index++
// remove head zero
if d < 20 {
index++
// remove head zero
if d < 20 {
index++
}
diff := max - index
C.memmove(buf, buf + index, diff + 1)
return tos(buf, diff)
//return tos(memdup(&buf[0] + index, (max - index)), (max - index))
}
unsafe {
C.memmove(buf, buf + index, (max - index) + 1)
return tos(buf, (max - index))
}
// return tos(buf + index, (max-index))
}
// str returns the value of the `bool` as a `string`.
@ -281,19 +245,12 @@ pub fn (b bool) str() string {
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)
hex[count] = 0
return tos(hex, count)
}
*/
//
// u64_to_hex converts the number `nn` to a (zero padded if necessary) hexadecimal `string`.
[inline]
[inline] [direct_array_access]
fn u64_to_hex(nn u64, len byte) string {
mut n := nn
mut buf := [256]byte{}
@ -309,7 +266,7 @@ fn u64_to_hex(nn u64, len byte) string {
}
// u64_to_hex_no_leading_zeros converts the number `nn` to hexadecimal `string`.
[inline]
[inline] [direct_array_access]
fn u64_to_hex_no_leading_zeros(nn u64, len byte) string {
mut n := nn
mut buf := [256]byte{}
@ -430,6 +387,7 @@ pub fn (nn voidptr) str() string {
// hex returns the value of the `byteptr` as a hexadecimal `string`.
// Note that the output is ***not*** zero padded.
//pub fn (nn byteptr) str() string {
pub fn (nn byteptr) str() string {
return u64(nn).hex()
}