1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/github.com/tdewolff/parse/v2/strconv/number.go b/vendor/github.com/tdewolff/parse/v2/strconv/number.go
new file mode 100644
index 000000000..9f768dbdb
--- /dev/null
+++ b/vendor/github.com/tdewolff/parse/v2/strconv/number.go
@@ -0,0 +1,125 @@
+package strconv
+
+import (
+	"math"
+	"unicode/utf8"
+)
+
+// ParseNumber parses a byte-slice and returns the number it represents and the amount of decimals.
+// If an invalid character is encountered, it will stop there.
+func ParseNumber(b []byte, groupSym rune, decSym rune) (int64, int, int) {
+	n, dec := 0, 0
+	sign := int64(1)
+	price := int64(0)
+	hasDecimals := false
+	if 0 < len(b) && b[0] == '-' {
+		sign = -1
+		n++
+	}
+	for n < len(b) {
+		if '0' <= b[n] && b[n] <= '9' {
+			digit := sign * int64(b[n]-'0')
+			if sign == 1 && (math.MaxInt64/10 < price || math.MaxInt64-digit < price*10) {
+				break
+			} else if sign == -1 && (price < math.MinInt64/10 || price*10 < math.MinInt64-digit) {
+				break
+			}
+			price *= 10
+			price += digit
+			if hasDecimals {
+				dec++
+			}
+			n++
+		} else if r, size := utf8.DecodeRune(b[n:]); !hasDecimals && (r == groupSym || r == decSym) {
+			if r == decSym {
+				hasDecimals = true
+			}
+			n += size
+		} else {
+			break
+		}
+	}
+	return price, dec, n
+}
+
+// AppendNumber will append an int64 formatted as a number with the given number of decimal digits.
+func AppendNumber(b []byte, price int64, dec int, groupSize int, groupSym rune, decSym rune) []byte {
+	if dec < 0 {
+		dec = 0
+	}
+	if utf8.RuneLen(groupSym) == -1 {
+		groupSym = '.'
+	}
+	if utf8.RuneLen(decSym) == -1 {
+		decSym = ','
+	}
+
+	sign := int64(1)
+	if price < 0 {
+		sign = -1
+	}
+
+	// calculate size
+	n := LenInt(price)
+	if dec < n && 0 < groupSize && groupSym != 0 {
+		n += utf8.RuneLen(groupSym) * (n - dec - 1) / groupSize
+	}
+	if 0 < dec {
+		if n <= dec {
+			n = 1 + dec // zero and decimals
+		}
+		n += utf8.RuneLen(decSym)
+	}
+	if sign == -1 {
+		n++
+	}
+
+	// resize byte slice
+	i := len(b)
+	if cap(b) < i+n {
+		b = append(b, make([]byte, n)...)
+	} else {
+		b = b[:i+n]
+	}
+
+	// print fractional-part
+	i += n - 1
+	if 0 < dec {
+		for 0 < dec {
+			c := byte(sign*(price%10)) + '0'
+			price /= 10
+			b[i] = c
+			dec--
+			i--
+		}
+		i -= utf8.RuneLen(decSym)
+		utf8.EncodeRune(b[i+1:], decSym)
+	}
+
+	// print integer-part
+	if price == 0 {
+		b[i] = '0'
+		if sign == -1 {
+			b[i-1] = '-'
+		}
+		return b
+	}
+	j := 0
+	for price != 0 {
+		if 0 < groupSize && groupSym != 0 && 0 < j && j%groupSize == 0 {
+			i -= utf8.RuneLen(groupSym)
+			utf8.EncodeRune(b[i+1:], groupSym)
+		}
+
+		c := byte(sign*(price%10)) + '0'
+		price /= 10
+		b[i] = c
+		i--
+		j++
+	}
+
+	if sign == -1 {
+		b[i] = '-'
+	}
+	return b
+}