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|
package main
import (
"fmt"
"io"
"os"
"path/filepath"
"unsafe"
"git.thomasvoss.com/euro-cash.eu/lib/mintage"
)
const cols = unsafe.Sizeof(mintage.Row{}.Cols) /
unsafe.Sizeof(mintage.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 := mintage.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)
for i, tbl := range data.Tables {
if len(tbl) != 0 {
var section string
switch mintage.CoinType(i) {
case mintage.TypeCirculated:
section = "CIRC"
case mintage.TypeNIFC:
section = "BU"
case mintage.TypeProof:
section = "PROOF"
}
fmt.Fprintf(out, "\n\nBEGIN %s\n", section)
formatSection(out, tbl)
}
}
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 []mintage.Row) {
var (
longestMM int
longestNum [cols]int
)
for i, row := range rows {
n := len(row.Mintmark)
if n != 0 && i != 0 && row.Year != rows[i-1].Year {
n++
}
longestMM = max(longestMM, n)
for j, col := range row.Cols {
n := intlen(col)
longestNum[j] = max(longestNum[j], n+(n-1)/3)
}
}
extraSpace := 0
if longestMM != 0 {
extraSpace = 2
}
for i, row := range rows {
var label string
if row.Mintmark != "" {
if i != 0 && row.Year != rows[i-1].Year {
label = row.Mintmark + "*: "
} else {
label = row.Mintmark + ": "
}
}
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 <= mintage.Invalid {
panic(fmt.Sprintf("invalid input %d", n))
} else if n == mintage.Unknown {
return "?"
}
digits := intlen(n)
dots := (digits - 1) / 3
out := make([]byte, digits+dots)
for i, j := len(out)-1, 0; ; i-- {
out[i] = byte(n%10) + 48
n /= 10
if n == 0 {
return string(out)
}
if j++; j == 3 {
i, j = i-1, 0
out[i] = '.'
}
}
}
func intlen(v int) int {
switch {
case v <= mintage.Invalid:
panic("mintage count is negative and not -1")
case v == 0, v == mintage.Unknown:
return 1
default:
n := 0
for x := v; x != 0; x /= 10 {
n++
}
return n
}
}
func warn(e error) {
fmt.Fprintf(os.Stderr, "%s: %s\n", filepath.Base(os.Args[0]), e)
rv = 1
}
|
