go-dirty.git

  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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

package dirty

import (
	"math"
	"strconv"
	"strings"
)

type Int int

func (Int) isElement() {}
func (Int) getType() ElementType {
	return ElemInt
}
func (i Int) String() string {
	return strconv.FormatInt(int64(i), 10)
}

type Float float64

func (Float) isElement() {}
func (Float) getType() ElementType {
	return ElemFloat
}
func (i Float) String() string {
	return strconv.FormatFloat(float64(i), 'f', -1, 64)
}

func convertDozenal(d string) string {
	result := ""
	for _, c := range d {
		if c == '↊' {
			result += "a"
		} else if c == '↋' {
			result += "b"
		} else if c == '·' {
			result += "."
		} else {
			result += string(c)
		}
	}
	return result
}

func parseNumber(t token) (token, error) {
	l := len(t.t)
	if (in('.', []rune(t.t)) && t.t[l-1] != '.') || (in('·', []rune(t.t)) && t.t[l-1] != '·') {
		return parseFloat(t)
	} else if in('e', []rune(t.t)) && t.t[0] != '0' {
		return parseEngFloat(t)
	} else {
		return parseInt(t)
	}
}

func parseFloat(t token) (token, error) {
	t.ttype = FLOAT
	if in('·', []rune(t.t)) {
		number := strings.SplitN(convertDozenal(t.t), ".", 2)
		whole, err := strconv.ParseInt(number[0], 12, 64)
		if err != nil {
			return token{}, err
		}
		fraction, err := strconv.ParseUint(number[1], 12, 64)
		if err != nil {
			return token{}, err
		}

		t.t = ""
		w := float64(whole)
		if fraction != 0 {
			var sign float64
			if w < 0 {
				sign = -1.0
			} else {
				sign = 1.0
			}
			l := math.Floor(math.Log10((float64(fraction))/math.Log10(12)) + 1)
			w += (float64(fraction) / math.Pow(12, l)) * sign
		}
		t.f = &w
		return t, nil
	} else {
		f, err := strconv.ParseFloat(t.t, 64)
		t.t = ""
		t.f = &f
		return t, err
	}
}

func parseEngFloat(t token) (token, error) {
	t.ttype = FLOAT
	number := strings.SplitN(t.t, "e", 2)
	a, err := strconv.ParseFloat(number[0], 64)
	if err != nil {
		return token{}, err
	}
	b, err := strconv.ParseInt(number[1], 10, 64)
	if err != nil {
		return token{}, err
	}
	num := a * math.Pow10(int(b))
	t.t = ""
	t.f = &num
	return t, nil
}

func parseComma(num string, z int) (string, error) {
	num2 := ""
	prevIsComma := false
	lastComma := -1
	zeroes := ""
	for i := 0; i < z; i++ {
		zeroes += "0"
	}
	for i, d := range num {
		if d == ',' {
			if prevIsComma {
				num2 += zeroes
			} else if !((i-lastComma) == z+1 || lastComma == -1) {
				return "", NewCommaError(num)
			}
			lastComma = i
		} else {
			num2 += string(d)
		}
		prevIsComma = d == ','
	}
	return num2, nil
}

func parseInt(t token) (token, error) {
	num2 := t.t
	base := 10

	if t.t[0] == '0' && t.t[1] == 'b' {
		num := t.t[2:]
		if num[0] == ',' {
			num = "1" + num
		}

		var err error = nil
		num2, err = parseComma(num, 8)
		if err != nil {
			return token{}, err
		}

		num2 = "0b" + num2
		base = 0
	}
	if t.t[0] == '0' && t.t[1] == 'o' {
		num2 = t.t
		base = 0
	}
	if t.t[0] == '0' && t.t[1] == 'x' {
		num2 = t.t
		base = 0
	}
	if in('·', []rune(t.t)) {
		num, err := parseComma(t.t, 3) // 4?
		if err != nil {
			return token{}, err
		}
		num2 = convertDozenal(num)
		num2 = num2[:len(num2)-1]
		base = 12
	}
	if in('.', []rune(t.t)) {
		num2 = t.t[:len(t.t)-1]
		var err error = nil
		parseComma(num2, 3)
		if err != nil {
			return token{}, err
		}
		base = 10
	}
	result, err := strconv.ParseInt(num2, base, 64)
	t.i = &result
	return t, err
}