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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
package transformers
import (
"container/list"
"fmt"
"os"
"strings"
"github.com/johnkerl/miller/v6/pkg/cli"
"github.com/johnkerl/miller/v6/pkg/mlrval"
"github.com/johnkerl/miller/v6/pkg/types"
)
// ----------------------------------------------------------------
const verbNameFormatValues = "format-values"
const defaultFormatValuesStringFormat = "%s"
const defaultFormatValuesIntFormat = "%d"
const defaultFormatValuesFloatFormat = "%f"
var FormatValuesSetup = TransformerSetup{
Verb: verbNameFormatValues,
UsageFunc: transformerFormatValuesUsage,
ParseCLIFunc: transformerFormatValuesParseCLI,
IgnoresInput: false,
}
// ----------------------------------------------------------------
func transformerFormatValuesUsage(
o *os.File,
) {
fmt.Fprintf(o, "Usage: %s %s [options]\n", "mlr", verbNameFormatValues)
fmt.Fprintf(o, "Applies format strings to all field values, depending on autodetected type.\n")
fmt.Fprintf(o, "* If a field value is detected to be integer, applies integer format.\n")
fmt.Fprintf(o, "* Else, if a field value is detected to be float, applies float format.\n")
fmt.Fprintf(o, "* Else, applies string format.\n")
fmt.Fprintf(o, "\n")
fmt.Fprintf(o, "Note: this is a low-keystroke way to apply formatting to many fields. To get\n")
fmt.Fprintf(o, "finer control, please see the fmtnum function within the mlr put DSL.\n")
fmt.Fprintf(o, "\n")
fmt.Fprintf(o, "Note: this verb lets you apply arbitrary format strings, which can produce\n")
fmt.Fprintf(o, "undefined behavior and/or program crashes. See your system's \"man printf\".\n")
fmt.Fprintf(o, "\n")
fmt.Fprintf(o, "Options:\n")
fmt.Fprintf(o, "-i {integer format} Defaults to \"%s\".\n", defaultFormatValuesIntFormat)
fmt.Fprintf(o, " Examples: \"%%06lld\", \"%%08llx\".\n")
fmt.Fprintf(o, " Note that Miller integers are long long so you must use\n")
fmt.Fprintf(o, " formats which apply to long long, e.g. with ll in them.\n")
fmt.Fprintf(o, " Undefined behavior results otherwise.\n")
fmt.Fprintf(o, "-f {float format} Defaults to \"%s\".\n", defaultFormatValuesFloatFormat)
fmt.Fprintf(o, " Examples: \"%%8.3lf\", \"%%.6le\".\n")
fmt.Fprintf(o, " Note that Miller floats are double-precision so you must\n")
fmt.Fprintf(o, " use formats which apply to double, e.g. with l[efg] in them.\n")
fmt.Fprintf(o, " Undefined behavior results otherwise.\n")
fmt.Fprintf(o, "-s {string format} Defaults to \"%s\".\n", defaultFormatValuesStringFormat)
fmt.Fprintf(o, " Examples: \"_%%s\", \"%%08s\".\n")
fmt.Fprintf(o, " Note that you must use formats which apply to string, e.g.\n")
fmt.Fprintf(o, " with s in them. Undefined behavior results otherwise.\n")
fmt.Fprintf(o, "-n Coerce field values autodetected as int to float, and then\n")
fmt.Fprintf(o, " apply the float format.\n")
}
func transformerFormatValuesParseCLI(
pargi *int,
argc int,
args []string,
_ *cli.TOptions,
doConstruct bool, // false for first pass of CLI-parse, true for second pass
) IRecordTransformer {
// Skip the verb name from the current spot in the mlr command line
argi := *pargi
verb := args[argi]
argi++
stringFormat := defaultFormatValuesStringFormat
intFormat := defaultFormatValuesIntFormat
floatFormat := defaultFormatValuesFloatFormat
coerceIntToFloat := false
for argi < argc /* variable increment: 1 or 2 depending on flag */ {
opt := args[argi]
if !strings.HasPrefix(opt, "-") {
break // No more flag options to process
}
if args[argi] == "--" {
break // All transformers must do this so main-flags can follow verb-flags
}
argi++
if opt == "-h" || opt == "--help" {
transformerFormatValuesUsage(os.Stdout)
os.Exit(0)
} else if opt == "-s" {
stringFormat = cli.VerbGetStringArgOrDie(verb, opt, args, &argi, argc)
} else if opt == "-i" {
intFormat = cli.VerbGetStringArgOrDie(verb, opt, args, &argi, argc)
} else if opt == "-f" {
floatFormat = cli.VerbGetStringArgOrDie(verb, opt, args, &argi, argc)
} else if opt == "-n" {
coerceIntToFloat = true
} else {
transformerFormatValuesUsage(os.Stderr)
os.Exit(1)
}
}
*pargi = argi
if !doConstruct { // All transformers must do this for main command-line parsing
return nil
}
transformer, err := NewTransformerFormatValues(
stringFormat,
intFormat,
floatFormat,
coerceIntToFloat,
)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
return transformer
}
// ----------------------------------------------------------------
type TransformerFormatValues struct {
stringFormatter mlrval.IFormatter
intFormatter mlrval.IFormatter
floatFormatter mlrval.IFormatter
coerceIntToFloat bool
}
func NewTransformerFormatValues(
stringFormat string,
intFormat string,
floatFormat string,
coerceIntToFloat bool,
) (*TransformerFormatValues, error) {
stringFormatter, err := mlrval.GetFormatter(stringFormat)
if err != nil {
return nil, err
}
intFormatter, err := mlrval.GetFormatter(intFormat)
if err != nil {
return nil, err
}
floatFormatter, err := mlrval.GetFormatter(floatFormat)
if err != nil {
return nil, err
}
tr := &TransformerFormatValues{
stringFormatter: stringFormatter,
intFormatter: intFormatter,
floatFormatter: floatFormatter,
coerceIntToFloat: coerceIntToFloat,
}
return tr, nil
}
// ----------------------------------------------------------------
func (tr *TransformerFormatValues) Transform(
inrecAndContext *types.RecordAndContext,
outputRecordsAndContexts *list.List, // list of *types.RecordAndContext
inputDownstreamDoneChannel <-chan bool,
outputDownstreamDoneChannel chan<- bool,
) {
HandleDefaultDownstreamDone(inputDownstreamDoneChannel, outputDownstreamDoneChannel)
if inrecAndContext.EndOfStream {
outputRecordsAndContexts.PushBack(inrecAndContext) // emit end-of-stream marker
return
}
for pe := inrecAndContext.Record.Head; pe != nil; pe = pe.Next {
if tr.coerceIntToFloat {
_, isNumeric := pe.Value.GetNumericToFloatValue()
if isNumeric {
pe.Value = tr.floatFormatter.Format(pe.Value)
} else if pe.Value.IsStringOrVoid() {
pe.Value = tr.stringFormatter.Format(pe.Value)
} // else, don't rewrite booleans, arrays, maps, etc.
} else {
_, isInt := pe.Value.GetIntValue()
_, isFloat := pe.Value.GetFloatValue()
if isInt {
pe.Value = tr.intFormatter.Format(pe.Value)
} else if isFloat {
pe.Value = tr.floatFormatter.Format(pe.Value)
} else if pe.Value.IsStringOrVoid() {
pe.Value = tr.stringFormatter.Format(pe.Value)
} // else, don't rewrite booleans, arrays, maps, etc.
}
}
outputRecordsAndContexts.PushBack(inrecAndContext)
}
|
