44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero 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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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package util
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type Number interface {
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~int | ~int8 | ~int16 | ~int32 | ~int64 |
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~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 |
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~uintptr | ~float32 | ~float64
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}
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// Decr performs a safe decrement of
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// n, clamping minimum value at zero.
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func Decr[N Number](n N) N {
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if n <= 0 {
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return 0
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}
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return n - 1
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}
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// Div performs a safe division of
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// n1 and n2, checking for zero n2. In the
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// case of zero n2, zero is returned.
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func Div[N Number](n1, n2 N) N {
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if n2 == 0 {
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return 0
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}
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return n1 / n2
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}
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