blob: 94b38343e8cdca51b91984c76ea63afb4e521ad6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
package strconv
// AppendPrice will append an int64 formatted as a price, where the int64 is the price in cents.
// It does not display whether a price is negative or not.
func AppendPrice(b []byte, price int64, dec bool, milSeparator byte, decSeparator byte) []byte {
if price < 0 {
if price == -9223372036854775808 {
x := []byte("92 233 720 368 547 758 08")
x[2] = milSeparator
x[6] = milSeparator
x[10] = milSeparator
x[14] = milSeparator
x[18] = milSeparator
x[22] = decSeparator
return append(b, x...)
}
price = -price
}
// rounding
if !dec {
firstDec := (price / 10) % 10
if firstDec >= 5 {
price += 100
}
}
// calculate size
n := LenInt(price) - 2
if n > 0 {
n += (n - 1) / 3 // mil separator
} else {
n = 1
}
if dec {
n += 2 + 1 // decimals + dec separator
}
// resize byte slice
i := len(b)
if i+n > cap(b) {
b = append(b, make([]byte, n)...)
} else {
b = b[:i+n]
}
// print fractional-part
i += n - 1
if dec {
for j := 0; j < 2; j++ {
c := byte(price%10) + '0'
price /= 10
b[i] = c
i--
}
b[i] = decSeparator
i--
} else {
price /= 100
}
if price == 0 {
b[i] = '0'
return b
}
// print integer-part
j := 0
for price > 0 {
if j == 3 {
b[i] = milSeparator
i--
j = 0
}
c := byte(price%10) + '0'
price /= 10
b[i] = c
i--
j++
}
return b
}
|
