diff options
Diffstat (limited to 'src/mintage/parser.go')
| -rw-r--r-- | src/mintage/parser.go | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/src/mintage/parser.go b/src/mintage/parser.go deleted file mode 100644 index 364b6e8..0000000 --- a/src/mintage/parser.go +++ /dev/null @@ -1,297 +0,0 @@ -package mintage - -import ( - "bufio" - "fmt" - "io" - "strconv" - "strings" - "time" -) - -type SyntaxError struct { - expected, got string - file string - linenr int -} - -func (e SyntaxError) Error() string { - return fmt.Sprintf("%s:%d: syntax error: expected %s but got %s", - e.file, e.linenr, e.expected, e.got) -} - -type Data struct { - Standard []SRow - Commemorative []CRow -} - -type SRow struct { - Year int - Mintmark string - Mintages [typeCount][denoms]int -} - -type CRow struct { - Year int - Mintmark string - Name string - Mintage [typeCount]int -} - -const ( - TypeCirc = iota - TypeNIFC - TypeProof - typeCount -) - -const ( - Unknown = -iota - 1 - Invalid -) - -const ( - denoms = 8 - ws = " \t" -) - -func Parse(r io.Reader, file string) (Data, error) { - yearsSince := time.Now().Year() - 1999 + 1 - data := Data{ - Standard: make([]SRow, 0, yearsSince), - Commemorative: make([]CRow, 0, yearsSince), - } - - scanner := bufio.NewScanner(r) - for linenr := 1; scanner.Scan(); linenr++ { - line := strings.Trim(scanner.Text(), ws) - if isBlankOrComment(line) { - continue - } - - if len(line) < 4 || !isNumeric(line[:4], false) { - return Data{}, SyntaxError{ - expected: "4-digit year", - got: line, - linenr: linenr, - file: file, - } - } - - var ( - commem bool - mintmark string - ) - year, _ := strconv.Atoi(line[:4]) - line = line[4:] - - if len(line) != 0 { - if strings.ContainsRune(ws, rune(line[0])) { - commem = true - goto out - } - if line[0] != '-' { - return Data{}, SyntaxError{ - expected: "end-of-line or mintmark", - got: line, - linenr: linenr, - file: file, - } - } - - if line = line[1:]; len(line) == 0 { - return Data{}, SyntaxError{ - expected: "mintmark", - got: "end-of-line", - linenr: linenr, - file: file, - } - } - - switch i := strings.IndexAny(line, ws); i { - case 0: - return Data{}, SyntaxError{ - expected: "mintmark", - got: "whitespace", - linenr: linenr, - file: file, - } - case -1: - mintmark = line - default: - mintmark, line = line[:i], line[i:] - commem = true - } - } - out: - - if !commem { - row := SRow{ - Year: year, - Mintmark: mintmark, - } - for i := range row.Mintages { - line = "" - for isBlankOrComment(line) { - if !scanner.Scan() { - return Data{}, SyntaxError{ - expected: "mintage row", - got: "end-of-file", - linenr: linenr, - file: file, - } - } - line = strings.Trim(scanner.Text(), ws) - linenr++ - } - - tokens := strings.FieldsFunc(line, func(r rune) bool { - return strings.ContainsRune(ws, r) - }) - if tokcnt := len(tokens); tokcnt != denoms { - word := "entries" - if tokcnt == 1 { - word = "entry" - } - return Data{}, SyntaxError{ - expected: fmt.Sprintf("%d mintage entries", denoms), - got: fmt.Sprintf("%d %s", tokcnt, word), - linenr: linenr, - file: file, - } - } - - for j, tok := range tokens { - if tok != "?" && !isNumeric(tok, true) { - return Data{}, SyntaxError{ - expected: "numeric mintage figure or ‘?’", - got: tok, - linenr: linenr, - file: file, - } - } - - if tok == "?" { - row.Mintages[i][j] = Unknown - } else { - row.Mintages[i][j] = atoiWithDots(tok) - } - } - } - - data.Standard = append(data.Standard, row) - } else { - row := CRow{ - Year: year, - Mintmark: mintmark, - } - line = strings.TrimLeft(line, ws) - if line[0] != '"' { - return Data{}, SyntaxError{ - expected: "string", - got: line, - linenr: linenr, - file: file, - } - } - - line = line[1:] - switch i := strings.IndexByte(line, '"'); i { - case -1: - return Data{}, SyntaxError{ - expected: "closing quote", - got: "end-of-line", - linenr: linenr, - file: file, - } - case 0: - return Data{}, SyntaxError{ - expected: "commemorated event", - got: "empty string", - linenr: linenr, - file: file, - } - default: - row.Name, line = line[:i], line[i+1:] - } - - if len(line) != 0 { - return Data{}, SyntaxError{ - expected: "end-of-line", - got: line, - linenr: linenr, - file: file, - } - } - - for isBlankOrComment(line) { - if !scanner.Scan() { - return Data{}, SyntaxError{ - expected: "mintage row", - got: "end-of-file", - linenr: linenr, - file: file, - } - } - line = strings.Trim(scanner.Text(), ws) - linenr++ - } - - tokens := strings.FieldsFunc(line, func(r rune) bool { - return strings.ContainsRune(ws, r) - }) - if tokcnt := len(tokens); tokcnt != typeCount { - word := "entries" - if tokcnt == 1 { - word = "entry" - } - return Data{}, SyntaxError{ - expected: fmt.Sprintf("%d mintage entries", typeCount), - got: fmt.Sprintf("%d %s", tokcnt, word), - linenr: linenr, - file: file, - } - } - - for i, tok := range tokens { - if tok == "?" { - row.Mintage[i] = Unknown - } else { - row.Mintage[i] = atoiWithDots(tok) - } - } - - data.Commemorative = append(data.Commemorative, row) - } - } - - 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': - default: - if ch != '.' || !dot { - return false - } - } - } - return true -} - -func atoiWithDots(s string) int { - n := 0 - for _, ch := range s { - if ch == '.' { - continue - } - n = n*10 + int(ch) - '0' - } - return n -} - -func isBlankOrComment(s string) bool { - return len(s) == 0 || s[0] == '#' -} |