104 lines
2.0 KiB
V
104 lines
2.0 KiB
V
module strconv
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import strings
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pub fn format_str_sb(s string, p BF_param, mut sb strings.Builder) {
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if p.len0 <= 0 {
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sb.write_string(s)
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return
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}
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dif := p.len0 - utf8_str_visible_length(s)
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if dif <= 0 {
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sb.write_string(s)
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return
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}
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if p.allign == .right {
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for i1 := 0; i1 < dif; i1++ {
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sb.write_byte(p.pad_ch)
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}
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}
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sb.write_string(s)
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if p.allign == .left {
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for i1 := 0; i1 < dif; i1++ {
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sb.write_byte(p.pad_ch)
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}
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}
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}
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const (
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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
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// digit pairs in reverse order
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digit_pairs = '00102030405060708090011121314151617181910212223242526272829203132333435363738393041424344454647484940515253545556575859506162636465666768696071727374757677787970818283848586878889809192939495969798999'
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)
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// format_dec_sb format a u64
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[direct_array_access]
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pub fn format_dec_sb(d u64, p BF_param, mut res strings.Builder) {
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mut n_char := dec_digits(d)
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sign_len := if !p.positive || p.sign_flag { 1 } else { 0 }
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number_len := sign_len + n_char
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dif := p.len0 - number_len
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mut sign_written := false
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if p.allign == .right {
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if p.pad_ch == `0` {
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if p.positive {
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if p.sign_flag {
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res.write_byte(`+`)
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sign_written = true
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}
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} else {
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res.write_byte(`-`)
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sign_written = true
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}
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}
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// write the pad chars
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for i1 := 0; i1 < dif; i1++ {
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res.write_byte(p.pad_ch)
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}
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}
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if !sign_written {
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// no pad char, write the sign before the number
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if p.positive {
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if p.sign_flag {
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res.write_byte(`+`)
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}
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} else {
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res.write_byte(`-`)
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}
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}
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// Legacy version
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// max u64 18446744073709551615 => 20 byte
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mut buf := [32]byte{}
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mut i := 20
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mut d1 := d
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for i >= (21 - n_char) {
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buf[i] = byte(d1 % 10) + `0`
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d1 = d1 / 10
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i--
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}
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for _ in 0 .. n_char {
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i++
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res.write_byte(buf[i])
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}
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i++
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//===========================================
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if p.allign == .left {
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for i1 := 0; i1 < dif; i1++ {
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res.write_byte(p.pad_ch)
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}
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}
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return
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}
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