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08751259b7
The exact-width integer types are required to use two’s complement
representation and may not have padding bits, cf. §7.20.1.1/1 in the C11
standard or https://en.cppreference.com/w/c/types/integer. This ensures that
they have the same domain and representation as the corresponding Go types.
Fixes #29878
Change-Id: Ie8a51e91666dfd89731c7859abe47356c94ca1be
GitHub-Last-Rev: 546a2cc3f1
GitHub-Pull-Request: golang/go#29907
Reviewed-on: https://go-review.googlesource.com/c/go/+/159258
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
21 lines
649 B
Go
21 lines
649 B
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cgotest
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// #include <stdint.h>
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// uint64_t issue29878exported(int8_t); // prototype must match
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// int16_t issue29878function(uint32_t arg) { return issue29878exported(arg); }
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import "C"
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import "testing"
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func test29878(t *testing.T) {
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const arg uint32 = 123 // fits into all integer types
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var ret int16 = C.issue29878function(arg) // no conversions needed
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if int64(ret) != int64(arg) {
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t.Errorf("return value unexpected: got %d, want %d", ret, arg)
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}
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}
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