1 files changed, 113 insertions, 0 deletions
diff --git a/v_windows/v/vlib/strconv/format.v b/v_windows/v/vlib/strconv/format.v
new file mode 100644
index 0000000..e11a604
--- /dev/null
+++ b/v_windows/v/vlib/strconv/format.v
@@ -0,0 +1,113 @@
+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 = byte(` `) // 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
+}
+
+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)
+	if p.allign == .right {
+		for i1 := 0; i1 < dif; i1++ {
+			res.write_b(p.pad_ch)
+		}
+	}
+	res.write_string(s)
+	if p.allign == .left {
+		for i1 := 0; i1 < dif; i1++ {
+			res.write_b(p.pad_ch)
+		}
+	}
+	return res.str()
+}