clerk/journal/printer/amount.go (view raw)
| 1 | package printer |
| 2 | |
| 3 | import ( |
| 4 | "strconv" |
| 5 | |
| 6 | "olexsmir.xyz/clerk/internal/decimal" |
| 7 | "olexsmir.xyz/clerk/journal/ast" |
| 8 | ) |
| 9 | |
| 10 | func (p *printer) writeAmount(a *ast.Amount, pos CommodityPos) { |
| 11 | if a == nil { |
| 12 | return |
| 13 | } |
| 14 | if a.IsExpr { |
| 15 | p.buf.WriteString(a.Expr) |
| 16 | return |
| 17 | } |
| 18 | |
| 19 | comm := a.Commodity |
| 20 | |
| 21 | if comm == "" { |
| 22 | p.writeDecimal(a.Quantity, a.QuantityFmt, 2) |
| 23 | return |
| 24 | } |
| 25 | |
| 26 | switch pos { |
| 27 | case CommodityBefore: |
| 28 | p.buf.WriteString(comm) |
| 29 | if a.HasSpace { |
| 30 | p.buf.WriteByte(' ') |
| 31 | } |
| 32 | p.writeDecimal(a.Quantity, a.QuantityFmt, 2) |
| 33 | case CommodityAfter: |
| 34 | p.writeDecimal(a.Quantity, a.QuantityFmt, 2) |
| 35 | if a.HasSpace { |
| 36 | p.buf.WriteByte(' ') |
| 37 | } |
| 38 | p.buf.WriteString(comm) |
| 39 | default: |
| 40 | panic("invalid CommodityPos value") |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | func (p *printer) writeCost(c *ast.Cost, pos CommodityPos) { |
| 45 | if c == nil { |
| 46 | return |
| 47 | } |
| 48 | if c.IsTotal { |
| 49 | p.buf.WriteString(" @@ ") |
| 50 | } else { |
| 51 | p.buf.WriteString(" @ ") |
| 52 | } |
| 53 | p.writeAmount(&c.Amount, pos) |
| 54 | } |
| 55 | |
| 56 | func (p *printer) writeBalanceAssertion(ba *ast.BalanceAssertion, pos CommodityPos) { |
| 57 | if ba == nil { |
| 58 | return |
| 59 | } |
| 60 | p.buf.WriteByte(' ') |
| 61 | switch { |
| 62 | case ba.IsInclusive: |
| 63 | p.buf.WriteString("=== ") |
| 64 | case ba.IsStrict: |
| 65 | p.buf.WriteString("== ") |
| 66 | default: |
| 67 | p.buf.WriteString("= ") |
| 68 | } |
| 69 | p.writeAmount(&ba.Amount, pos) |
| 70 | } |
| 71 | |
| 72 | func (p *printer) writeDecimal(d decimal.Decimal, fmt ast.QuantityFormat, forcePrec int) { |
| 73 | if d.IsZero() { |
| 74 | p.writeZero(fmt, forcePrec) |
| 75 | return |
| 76 | } |
| 77 | |
| 78 | coeff := d.Coeff() |
| 79 | if coeff == nil || coeff.Sign() == 0 { |
| 80 | p.writeZero(fmt, forcePrec) |
| 81 | return |
| 82 | } |
| 83 | |
| 84 | offset := d.Scale() |
| 85 | neg := coeff.Sign() < 0 |
| 86 | |
| 87 | raw := coeff.String() |
| 88 | if neg { |
| 89 | raw = raw[1:] |
| 90 | } |
| 91 | |
| 92 | decSep := byte('.') |
| 93 | if fmt.Decimal != 0 { |
| 94 | decSep = fmt.Decimal |
| 95 | } |
| 96 | |
| 97 | if offset >= len(raw) { |
| 98 | zeros := offset - len(raw) + 1 |
| 99 | if neg { |
| 100 | p.buf.WriteByte('-') |
| 101 | } |
| 102 | p.buf.WriteByte('0') |
| 103 | p.buf.WriteByte(decSep) |
| 104 | for i := 0; i < zeros-1; i++ { |
| 105 | p.buf.WriteByte('0') |
| 106 | } |
| 107 | if len(raw) < forcePrec { |
| 108 | p.buf.WriteString(raw) |
| 109 | for i := len(raw); i < forcePrec; i++ { |
| 110 | p.buf.WriteByte('0') |
| 111 | } |
| 112 | } else { |
| 113 | p.buf.WriteString(raw[:forcePrec]) |
| 114 | } |
| 115 | return |
| 116 | } |
| 117 | |
| 118 | split := len(raw) - offset |
| 119 | intPart := raw[:split] |
| 120 | fracPart := raw[split:] |
| 121 | |
| 122 | intPart = trimLeadingZeros(intPart) |
| 123 | if intPart == "" { |
| 124 | intPart = "0" |
| 125 | } |
| 126 | |
| 127 | if neg { |
| 128 | p.buf.WriteByte('-') |
| 129 | } |
| 130 | |
| 131 | if fmt.Thousands != 0 && len(intPart) > 3 { |
| 132 | p.writeThousands(intPart, fmt.Thousands) |
| 133 | } else { |
| 134 | p.buf.WriteString(intPart) |
| 135 | } |
| 136 | |
| 137 | p.buf.WriteByte(decSep) |
| 138 | |
| 139 | if len(fracPart) < forcePrec { |
| 140 | p.buf.WriteString(fracPart) |
| 141 | for i := len(fracPart); i < forcePrec; i++ { |
| 142 | p.buf.WriteByte('0') |
| 143 | } |
| 144 | } else { |
| 145 | p.buf.WriteString(fracPart[:forcePrec]) |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | func (p *printer) writeZero(fmt ast.QuantityFormat, prec int) { |
| 150 | p.buf.WriteByte('0') |
| 151 | sep := "." |
| 152 | if fmt.Decimal != 0 { |
| 153 | sep = string(fmt.Decimal) |
| 154 | } |
| 155 | p.buf.WriteString(sep) |
| 156 | for range prec { |
| 157 | p.buf.WriteByte('0') |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | func (p *printer) writeThousands(s string, sep byte) { |
| 162 | n := len(s) |
| 163 | for i := range n { |
| 164 | if i > 0 && (n-i)%3 == 0 { |
| 165 | p.buf.WriteByte(sep) |
| 166 | } |
| 167 | p.buf.WriteByte(s[i]) |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | func trimLeadingZeros(s string) string { |
| 172 | for i := 0; i < len(s); i++ { |
| 173 | if s[i] != '0' { |
| 174 | return s[i:] |
| 175 | } |
| 176 | } |
| 177 | return "" |
| 178 | } |
| 179 | |
| 180 | func quoteString(s string) string { |
| 181 | needsQuote := false |
| 182 | for _, c := range s { |
| 183 | if c == ' ' || c == '\t' || c == '"' || c == ';' || c == '#' { |
| 184 | needsQuote = true |
| 185 | break |
| 186 | } |
| 187 | } |
| 188 | if !needsQuote { |
| 189 | return s |
| 190 | } |
| 191 | return strconv.Quote(s) |
| 192 | } |