508 lines
9.4 KiB
V
508 lines
9.4 KiB
V
/*=============================================================================
|
|
Copyright (c) 2019-2022 Dario Deledda. All rights reserved.
|
|
Use of this source code is governed by an MIT license
|
|
that can be found in the LICENSE file.
|
|
|
|
This file contains string interpolation V functions
|
|
=============================================================================*/
|
|
module strconv
|
|
|
|
import strings
|
|
|
|
// strings.Builder version of format_str
|
|
pub fn format_str_sb(s string, p BF_param, mut sb strings.Builder) {
|
|
if p.len0 <= 0 {
|
|
sb.write_string(s)
|
|
return
|
|
}
|
|
dif := p.len0 - utf8_str_visible_length(s)
|
|
if dif <= 0 {
|
|
sb.write_string(s)
|
|
return
|
|
}
|
|
|
|
if p.allign == .right {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
sb.write_byte(p.pad_ch)
|
|
}
|
|
}
|
|
sb.write_string(s)
|
|
if p.allign == .left {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
sb.write_byte(p.pad_ch)
|
|
}
|
|
}
|
|
}
|
|
|
|
const (
|
|
max_size_f64_char = 32 // the f64 max representation is -36,028,797,018,963,968e1023, 21 chars, 32 is faster for the memory manger
|
|
// digit pairs in reverse order
|
|
digit_pairs = '00102030405060708090011121314151617181910212223242526272829203132333435363738393041424344454647484940515253545556575859506162636465666768696071727374757677787970818283848586878889809192939495969798999'
|
|
)
|
|
|
|
// format_dec_sb format a u64
|
|
[direct_array_access]
|
|
pub fn format_dec_sb(d u64, p BF_param, mut res strings.Builder) {
|
|
mut n_char := dec_digits(d)
|
|
sign_len := if !p.positive || p.sign_flag { 1 } else { 0 }
|
|
number_len := sign_len + n_char
|
|
dif := p.len0 - number_len
|
|
mut sign_written := false
|
|
|
|
if p.allign == .right {
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
res.write_byte(`+`)
|
|
sign_written = true
|
|
}
|
|
} else {
|
|
res.write_byte(`-`)
|
|
sign_written = true
|
|
}
|
|
}
|
|
// write the pad chars
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
res.write_byte(p.pad_ch)
|
|
}
|
|
}
|
|
|
|
if !sign_written {
|
|
// no pad char, write the sign before the number
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
res.write_byte(`+`)
|
|
}
|
|
} else {
|
|
res.write_byte(`-`)
|
|
}
|
|
}
|
|
|
|
/*
|
|
// Legacy version
|
|
// max u64 18446744073709551615 => 20 byte
|
|
mut buf := [32]byte{}
|
|
mut i := 20
|
|
mut d1 := d
|
|
for i >= (21 - n_char) {
|
|
buf[i] = byte(d1 % 10) + `0`
|
|
d1 = d1 / 10
|
|
i--
|
|
}
|
|
i++
|
|
*/
|
|
|
|
//===========================================
|
|
// Speed version
|
|
// max u64 18446744073709551615 => 20 byte
|
|
mut buf := [32]byte{}
|
|
mut i := 20
|
|
mut n := d
|
|
mut d_i := u64(0)
|
|
if n > 0 {
|
|
for n > 0 {
|
|
n1 := n / 100
|
|
// calculate the digit_pairs start index
|
|
d_i = (n - (n1 * 100)) << 1
|
|
n = n1
|
|
unsafe {
|
|
buf[i] = strconv.digit_pairs.str[d_i]
|
|
}
|
|
i--
|
|
d_i++
|
|
unsafe {
|
|
buf[i] = strconv.digit_pairs.str[d_i]
|
|
}
|
|
i--
|
|
}
|
|
i++
|
|
// remove head zero
|
|
if d_i < 20 {
|
|
i++
|
|
}
|
|
unsafe { res.write_ptr(&buf[i], n_char) }
|
|
} else {
|
|
// we have a zero no need of more code!
|
|
res.write_byte(`0`)
|
|
}
|
|
//===========================================
|
|
|
|
if p.allign == .left {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
res.write_byte(p.pad_ch)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
[direct_array_access; manualfree]
|
|
pub fn f64_to_str_lnd1(f f64, dec_digit int) string {
|
|
unsafe {
|
|
// we add the rounding value
|
|
s := f64_to_str(f + dec_round[dec_digit], 18)
|
|
// check for +inf -inf Nan
|
|
if s.len > 2 && (s[0] == `n` || s[1] == `i`) {
|
|
return s
|
|
}
|
|
|
|
m_sgn_flag := false
|
|
mut sgn := 1
|
|
mut b := [26]byte{}
|
|
mut d_pos := 1
|
|
mut i := 0
|
|
mut i1 := 0
|
|
mut exp := 0
|
|
mut exp_sgn := 1
|
|
|
|
mut dot_res_sp := -1
|
|
|
|
// get sign and deciaml parts
|
|
for c in s {
|
|
if c == `-` {
|
|
sgn = -1
|
|
i++
|
|
} else if c == `+` {
|
|
sgn = 1
|
|
i++
|
|
} else if c >= `0` && c <= `9` {
|
|
b[i1] = c
|
|
i1++
|
|
i++
|
|
} else if c == `.` {
|
|
if sgn > 0 {
|
|
d_pos = i
|
|
} else {
|
|
d_pos = i - 1
|
|
}
|
|
i++
|
|
} else if c == `e` {
|
|
i++
|
|
break
|
|
} else {
|
|
s.free()
|
|
return '[Float conversion error!!]'
|
|
}
|
|
}
|
|
b[i1] = 0
|
|
|
|
// get exponent
|
|
if s[i] == `-` {
|
|
exp_sgn = -1
|
|
i++
|
|
} else if s[i] == `+` {
|
|
exp_sgn = 1
|
|
i++
|
|
}
|
|
|
|
mut c := i
|
|
for c < s.len {
|
|
exp = exp * 10 + int(s[c] - `0`)
|
|
c++
|
|
}
|
|
|
|
// allocate exp+32 chars for the return string
|
|
// mut res := []byte{len:exp+32,init:`0`}
|
|
mut res := []byte{len: exp + 32, init: 0}
|
|
mut r_i := 0 // result string buffer index
|
|
|
|
// println("s:${sgn} b:${b[0]} es:${exp_sgn} exp:${exp}")
|
|
|
|
// s no more needed
|
|
s.free()
|
|
|
|
if sgn == 1 {
|
|
if m_sgn_flag {
|
|
res[r_i] = `+`
|
|
r_i++
|
|
}
|
|
} else {
|
|
res[r_i] = `-`
|
|
r_i++
|
|
}
|
|
|
|
i = 0
|
|
if exp_sgn >= 0 {
|
|
for b[i] != 0 {
|
|
res[r_i] = b[i]
|
|
r_i++
|
|
i++
|
|
if i >= d_pos && exp >= 0 {
|
|
if exp == 0 {
|
|
dot_res_sp = r_i
|
|
res[r_i] = `.`
|
|
r_i++
|
|
}
|
|
exp--
|
|
}
|
|
}
|
|
for exp >= 0 {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
exp--
|
|
}
|
|
// println("exp: $exp $r_i $dot_res_sp")
|
|
} else {
|
|
mut dot_p := true
|
|
for exp > 0 {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
exp--
|
|
if dot_p {
|
|
dot_res_sp = r_i
|
|
res[r_i] = `.`
|
|
r_i++
|
|
dot_p = false
|
|
}
|
|
}
|
|
for b[i] != 0 {
|
|
res[r_i] = b[i]
|
|
r_i++
|
|
i++
|
|
}
|
|
}
|
|
|
|
// no more digits needed, stop here
|
|
if dec_digit <= 0 {
|
|
tmp_res := tos(res.data, dot_res_sp).clone()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
|
|
// println("r_i-d_pos: ${r_i - d_pos}")
|
|
if dot_res_sp >= 0 {
|
|
if (r_i - dot_res_sp) > dec_digit {
|
|
r_i = dot_res_sp + dec_digit + 1
|
|
}
|
|
res[r_i] = 0
|
|
// println("result: [${tos(&res[0],r_i)}]")
|
|
tmp_res := tos(res.data, r_i).clone()
|
|
res.free()
|
|
return tmp_res
|
|
} else {
|
|
if dec_digit > 0 {
|
|
mut c1 := 0
|
|
res[r_i] = `.`
|
|
r_i++
|
|
for c1 < dec_digit {
|
|
res[r_i] = `0`
|
|
r_i++
|
|
c1++
|
|
}
|
|
res[r_i] = 0
|
|
}
|
|
tmp_res := tos(res.data, r_i).clone()
|
|
res.free()
|
|
return tmp_res
|
|
}
|
|
}
|
|
}
|
|
|
|
// strings.Builder version of format_fl
|
|
[direct_array_access; manualfree]
|
|
pub fn format_fl(f f64, p BF_param) string {
|
|
unsafe {
|
|
mut fs := f64_to_str_lnd1(if f >= 0.0 { f } else { -f }, p.len1)
|
|
|
|
// error!!
|
|
if fs[0] == `[` {
|
|
return fs
|
|
}
|
|
|
|
if p.rm_tail_zero {
|
|
tmp := fs
|
|
fs = remove_tail_zeros(fs)
|
|
tmp.free()
|
|
}
|
|
|
|
mut buf := [strconv.max_size_f64_char]u8{} // write temp float buffer in stack
|
|
mut out := [strconv.max_size_f64_char]u8{} // out buffer
|
|
mut buf_i := 0 // index temporary string
|
|
mut out_i := 0 // index output string
|
|
|
|
mut sign_len_diff := 0
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
out[out_i] = `+`
|
|
out_i++
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
out[out_i] = `-`
|
|
out_i++
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
buf[buf_i] = `+`
|
|
buf_i++
|
|
}
|
|
} else {
|
|
buf[buf_i] = `-`
|
|
buf_i++
|
|
}
|
|
}
|
|
|
|
// copy the float
|
|
vmemcpy(&buf[buf_i], fs.str, fs.len)
|
|
buf_i += fs.len
|
|
|
|
// make the padding if needed
|
|
dif := p.len0 - buf_i + sign_len_diff
|
|
if p.allign == .right {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
out[out_i] = p.pad_ch
|
|
out_i++
|
|
}
|
|
}
|
|
vmemcpy(&out[out_i], &buf[0], buf_i)
|
|
out_i += buf_i
|
|
if p.allign == .left {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
out[out_i] = p.pad_ch
|
|
out_i++
|
|
}
|
|
}
|
|
out[out_i] = 0
|
|
|
|
// return and free
|
|
tmp := fs
|
|
fs = tos_clone(&out[0])
|
|
tmp.free()
|
|
return fs
|
|
}
|
|
}
|
|
|
|
[direct_array_access; manualfree]
|
|
pub fn format_es(f f64, p BF_param) string {
|
|
unsafe {
|
|
mut fs := f64_to_str_pad(if f > 0 { f } else { -f }, p.len1)
|
|
if p.rm_tail_zero {
|
|
tmp := fs
|
|
fs = remove_tail_zeros(fs)
|
|
tmp.free()
|
|
}
|
|
|
|
mut buf := [strconv.max_size_f64_char]u8{} // write temp float buffer in stack
|
|
mut out := [strconv.max_size_f64_char]u8{} // out buffer
|
|
mut buf_i := 0 // index temporary string
|
|
mut out_i := 0 // index output string
|
|
|
|
mut sign_len_diff := 0
|
|
if p.pad_ch == `0` {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
out[out_i] = `+`
|
|
out_i++
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
out[out_i] = `-`
|
|
out_i++
|
|
sign_len_diff = -1
|
|
}
|
|
} else {
|
|
if p.positive {
|
|
if p.sign_flag {
|
|
buf[buf_i] = `+`
|
|
buf_i++
|
|
}
|
|
} else {
|
|
buf[buf_i] = `-`
|
|
buf_i++
|
|
}
|
|
}
|
|
|
|
// copy the float
|
|
vmemcpy(&buf[buf_i], fs.str, fs.len)
|
|
buf_i += fs.len
|
|
|
|
// make the padding if needed
|
|
dif := p.len0 - buf_i + sign_len_diff
|
|
if p.allign == .right {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
out[out_i] = p.pad_ch
|
|
out_i++
|
|
}
|
|
}
|
|
vmemcpy(&out[out_i], &buf[0], buf_i)
|
|
out_i += buf_i
|
|
if p.allign == .left {
|
|
for i1 := 0; i1 < dif; i1++ {
|
|
out[out_i] = p.pad_ch
|
|
out_i++
|
|
}
|
|
}
|
|
out[out_i] = 0
|
|
|
|
// return and free
|
|
tmp := fs
|
|
fs = tos_clone(&out[0])
|
|
tmp.free()
|
|
return fs
|
|
}
|
|
}
|
|
|
|
[direct_array_access]
|
|
pub fn remove_tail_zeros(s string) string {
|
|
unsafe {
|
|
mut buf := malloc_noscan(s.len + 1)
|
|
mut i_d := 0
|
|
mut i_s := 0
|
|
|
|
// skip spaces
|
|
for i_s < s.len && s[i_s] !in [`-`, `+`] && (s[i_s] > `9` || s[i_s] < `0`) {
|
|
buf[i_d] = s[i_s]
|
|
i_s++
|
|
i_d++
|
|
}
|
|
// sign
|
|
if i_s < s.len && s[i_s] in [`-`, `+`] {
|
|
buf[i_d] = s[i_s]
|
|
i_s++
|
|
i_d++
|
|
}
|
|
|
|
// integer part
|
|
for i_s < s.len && s[i_s] >= `0` && s[i_s] <= `9` {
|
|
buf[i_d] = s[i_s]
|
|
i_s++
|
|
i_d++
|
|
}
|
|
|
|
// check decimals
|
|
if i_s < s.len && s[i_s] == `.` {
|
|
mut i_s1 := i_s + 1
|
|
mut sum := 0
|
|
for i_s1 < s.len && s[i_s1] >= `0` && s[i_s1] <= `9` {
|
|
sum += s[i_s1] - byte(`0`)
|
|
i_s1++
|
|
}
|
|
// decimal part must be copied
|
|
if sum > 0 {
|
|
for c_i in i_s .. i_s1 {
|
|
buf[i_d] = s[c_i]
|
|
i_d++
|
|
}
|
|
}
|
|
i_s = i_s1
|
|
}
|
|
|
|
if i_s < s.len && s[i_s] != `.` {
|
|
// check exponent
|
|
for {
|
|
buf[i_d] = s[i_s]
|
|
i_s++
|
|
i_d++
|
|
if i_s >= s.len {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
buf[i_d] = 0
|
|
return tos(buf, i_d)
|
|
}
|
|
}
|