module strconv /* printf/sprintf V implementation Copyright (c) 2020 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 the printf/sprintf functions */ import strings pub enum Align_text { right = 0 left center } /* Float conversion utility */ const ( // rounding value dec_round = [ f64(0.5), 0.05, 0.005, 0.0005, 0.00005, 0.000005, 0.0000005, 0.00000005, 0.000000005, 0.0000000005, 0.00000000005, 0.000000000005, 0.0000000000005, 0.00000000000005, 0.000000000000005, 0.0000000000000005, 0.00000000000000005, 0.000000000000000005, 0.0000000000000000005, 0.00000000000000000005, ] ) /* const( // rounding value dec_round = [ f64(0.44), 0.044, 0.0044, 0.00044, 0.000044, 0.0000044, 0.00000044, 0.000000044, 0.0000000044, 0.00000000044, 0.000000000044, 0.0000000000044, 0.00000000000044, 0.000000000000044, 0.0000000000000044, 0.00000000000000044, 0.000000000000000044, 0.0000000000000000044, 0.00000000000000000044, 0.000000000000000000044, ] ) */ // max float 1.797693134862315708145274237317043567981e+308 /* Single format functions */ pub struct BF_param { pub mut: pad_ch byte = u8(` `) // padding char len0 int = -1 // default len for whole the number or string len1 int = 6 // number of decimal digits, if needed positive bool = true // mandatory: the sign of the number passed sign_flag bool // flag for print sign as prefix in padding allign Align_text = .right // alignment of the string rm_tail_zero bool // remove the tail zeros from floats } [manualfree] pub fn format_str(s string, p BF_param) string { if p.len0 <= 0 { return s.clone() } dif := p.len0 - utf8_str_visible_length(s) if dif <= 0 { return s.clone() } mut res := strings.new_builder(s.len + dif) defer { unsafe { res.free() } } if p.allign == .right { for i1 := 0; i1 < dif; i1++ { res.write_u8(p.pad_ch) } } res.write_string(s) if p.allign == .left { for i1 := 0; i1 < dif; i1++ { res.write_u8(p.pad_ch) } } return res.str() }