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package main
import (
"fmt"
"io"
"os"
"path/filepath"
"strconv"
"strings"
"unsafe"
"git.thomasvoss.com/euro-cash.eu/mintages"
)
const cols = unsafe.Sizeof(mintages.Row{}.Cols) /
unsafe.Sizeof(mintages.Row{}.Cols[0])
var rv int
func main() {
if len(os.Args) == 1 {
if err := mfmt("-", os.Stdin, os.Stdout); err != nil {
warn(err)
}
}
for _, arg := range os.Args[1:] {
f, err := os.OpenFile(arg, os.O_RDWR, 0)
if err != nil {
warn(err)
continue
}
defer f.Close()
if err := mfmt(arg, f, f); err != nil {
warn(err)
}
}
os.Exit(rv)
}
func mfmt(path string, in io.Reader, out io.Writer) error {
data, err := mintages.Parse(in, path)
if err != nil {
return err
}
f, outfile := out.(*os.File)
if outfile {
_, err := f.Seek(0, io.SeekStart)
if err != nil {
return err
}
}
fmt.Fprintf(out, `BEGIN %d`, data.StartYear)
if len(data.Circ) != 0 {
fmt.Fprintln(out, "\n\nBEGIN CIRC")
formatSection(out, data.Circ)
}
if len(data.BU) != 0 {
fmt.Fprintln(out, "\n\nBEGIN BU")
formatSection(out, data.BU)
}
if len(data.Proof) != 0 {
fmt.Fprintln(out, "\n\nBEGIN PROOF")
formatSection(out, data.Proof)
}
fmt.Fprintln(out, "")
if outfile {
if off, err := f.Seek(0, io.SeekCurrent); err != nil {
return err
} else if err = f.Truncate(off); err != nil {
return err
}
}
return nil
}
func formatSection(out io.Writer, rows []mintages.Row) {
var (
year string
longestMM int
longestNum [cols]int
)
for _, row := range rows {
s, mm, ok := strings.Cut(row.Label, "\u00A0")
if ok {
n := len(mm)
if s != year {
n++
}
longestMM = max(longestMM, n)
}
year = s
for i, col := range row.Cols {
longestNum[i] = max(longestNum[i], intlen(col))
}
}
extraSpace := 0
if longestMM != 0 {
extraSpace = 2
}
year = ""
for i, row := range rows {
var label string
s, mm, ok := strings.Cut(row.Label, "\u00A0")
if ok {
if s != year {
label = mm + "*: "
} else {
label = mm + ": "
}
}
year = s
fmt.Fprintf(out, "%-*s", longestMM+extraSpace, label)
for j, n := range row.Cols {
if j != 0 {
fmt.Fprintf(out, " ")
}
fmt.Fprintf(out, "%*s", longestNum[j], formatInt(n))
}
if i != len(rows)-1 {
fmt.Fprintln(out, "")
}
}
}
func formatInt(n int) string {
if n < -1 {
panic("mintage count is negative and not -1")
} else if n == -1 {
return "?"
}
in := strconv.Itoa(n)
dots := (len(in) - 1) / 3
out := make([]byte, len(in)+dots)
for i, j, k := len(in)-1, len(out)-1, 0; ; i, j = i-1, j-1 {
out[j] = in[i]
if i == 0 {
return string(out)
}
if k++; k == 3 {
j, k = j-1, 0
out[j] = '.'
}
}
}
func intlen(v int) int {
switch {
case v < -1:
panic("mintage count is negative and not -1")
case v == 0, v == -1:
return 1
default:
n := 0
for x := v; x != 0; x /= 10 {
n++
}
return n + (n-1)/3 /* Thousands separators */
}
}
func warn(e error) {
fmt.Fprintf(os.Stderr, "%s: %+v\n", filepath.Base(os.Args[0]), e)
rv = 1
}
|
