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46 lines
1.0 KiB
Go
46 lines
1.0 KiB
Go
package interp
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import (
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"fmt"
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"math/big"
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"strconv"
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"github.com/wader/fq/internal/mathextra"
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"github.com/wader/fq/pkg/bitio"
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"github.com/wader/fq/pkg/scalar"
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)
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func previewValue(v interface{}, df scalar.DisplayFormat) string {
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switch vv := v.(type) {
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case bool:
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if vv {
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return "true"
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}
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return "false"
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case int:
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// TODO: DisplayFormat is weird
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return mathextra.PadFormatInt(int64(vv), df.FormatBase(), true, 0)
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case int64:
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// TODO: DisplayFormat is weird
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return mathextra.PadFormatInt(vv, df.FormatBase(), true, 0)
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case uint64:
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return mathextra.PadFormatUint(vv, df.FormatBase(), true, 0)
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case float64:
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// TODO: float32? better truncated to significant digits?
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return strconv.FormatFloat(vv, 'g', -1, 64)
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case string:
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if len(vv) > 50 {
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return fmt.Sprintf("%q", vv[0:50]) + "..."
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}
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return fmt.Sprintf("%q", vv)
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case nil:
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return "null"
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case *bitio.Buffer:
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return "raw bits"
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case *big.Int:
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return mathextra.PadFormatBigInt(vv, df.FormatBase(), true, 0)
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default:
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panic("unreachable")
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}
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}
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