mirror of
https://github.com/ethereum/go-ethereum.git
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69 lines
1.9 KiB
Go
69 lines
1.9 KiB
Go
// Copyright 2025 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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//go:build !tinygo
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// +build !tinygo
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package rawdb
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import (
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"fmt"
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"io"
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"strings"
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"text/tabwriter"
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)
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// Lightweight internal table writer used instead of the external dependency.
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// It provides the small subset of the tablewriter API that the project uses.
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type Table struct {
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out io.Writer
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headers []string
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footer []string
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rows [][]string
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}
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func newTableWriter(w io.Writer) *Table {
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return &Table{out: w}
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}
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func (t *Table) SetHeader(headers []string) {
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t.headers = headers
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}
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func (t *Table) SetFooter(footer []string) {
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t.footer = footer
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}
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func (t *Table) AppendBulk(rows [][]string) {
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t.rows = rows
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}
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// Render prints a simple tab-separated table using text/tabwriter. This
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// intentionally prints a compact, readable table for CLI consumption and
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// fulfils the small API surface used in the codebase.
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func (t *Table) Render() {
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w := tabwriter.NewWriter(t.out, 0, 0, 2, ' ', 0)
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if len(t.headers) > 0 {
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fmt.Fprintln(w, strings.Join(t.headers, "\t"))
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}
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for _, row := range t.rows {
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fmt.Fprintln(w, strings.Join(row, "\t"))
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}
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if len(t.footer) > 0 {
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fmt.Fprintln(w, strings.Join(t.footer, "\t"))
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}
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_ = w.Flush()
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}
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