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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
package mintages
import (
"bufio"
"fmt"
"os"
"path/filepath"
"strconv"
"strings"
"time"
"unicode"
)
type coinset [8]int
type Data struct {
StartYear int
Circ, Bu, Proof []coinset
}
func ForCountry(code string) (Data, error) {
path := filepath.Join("data", "mintages", code)
f, err := os.Open(path)
if err != nil {
return Data{}, err
}
defer f.Close()
scanner := bufio.NewScanner(f)
var (
data Data // Our data struct
slice *[]coinset // Where to append mintages
)
for linenr := 1; scanner.Scan(); linenr++ {
line := scanner.Text()
tokens := strings.FieldsFunc(strings.TrimSpace(line), unicode.IsSpace)
switch {
case len(tokens) == 0:
continue
case tokens[0] == "BEGIN":
if len(tokens) != 2 {
return Data{}, ArgCountMismatchError{
token: tokens[0],
expected: 1,
got: len(tokens) - 1,
location: location{path, linenr},
}
}
arg := tokens[1]
switch arg {
case "CIRC":
slice = &data.Circ
case "BU":
slice = &data.Bu
case "PROOF":
slice = &data.Proof
default:
if !isNumeric(arg, false) {
return Data{}, SyntaxError{
expected: "‘CIRC’, ‘BU’, ‘PROOF’, or a year",
got: arg,
location: location{path, linenr},
}
}
data.StartYear, _ = strconv.Atoi(arg)
}
case isNumeric(tokens[0], true):
numcoins := len(coinset{})
tokcnt := len(tokens)
if tokcnt != numcoins {
return Data{}, SyntaxError{
expected: fmt.Sprintf("%d mintage entries", numcoins),
got: fmt.Sprintf("%d entries", tokcnt),
location: location{path, linenr},
}
}
var row coinset
for i, tok := range tokens {
row[i], _ = strconv.Atoi(strings.ReplaceAll(tok, ".", ""))
}
*slice = append(*slice, row)
default:
return Data{}, BadTokenError{
token: tokens[0],
location: location{path, linenr},
}
}
}
/* Pad rows of ‘unknown’ mintages at the end of each set of mintages
for each year that we haven’t filled in info for. This avoids
things accidentally breaking if the new year comes and we forget
to add extra rows. */
for _, ms := range [...]*[]coinset{&data.Circ, &data.Bu, &data.Proof} {
finalYear := len(*ms) + data.StartYear - 1
missing := time.Now().Year() - finalYear
for i := 0; i < missing; i++ {
*ms = append(*ms, coinset{-1, -1, -1, -1, -1, -1, -1, -1})
}
}
return data, nil
}
func isNumeric(s string, dot bool) bool {
for _, ch := range s {
switch ch {
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
case '.':
if !dot {
return false
}
default:
return false
}
}
return true
}
|
