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2621bd1bac
The gofrontend incorrectly accepted code that was missing a type conversion. The test case for this is bug518.go in https://go.dev/cl/536537. Future CLs in this series will detect the type error. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/536638
32 lines
777 B
Go
32 lines
777 B
Go
// errstr.go -- Error strings.
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// Copyright 2009 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 syscall
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import "internal/bytealg"
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//extern go_strerror
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func go_strerror(_C_int, *byte, Size_t) _C_int
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func Errstr(errnum int) string {
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for size := 128; ; size *= 2 {
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b := make([]byte, size)
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errno := go_strerror(_C_int(errnum), &b[0], Size_t(len(b)))
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if errno == 0 {
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i := bytealg.IndexByte(b, 0)
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// Lowercase first letter: Bad -> bad, but
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// STREAM -> STREAM.
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if i > 1 && 'A' <= b[0] && b[0] <= 'Z' && 'a' <= b[1] && b[1] <= 'z' {
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b[0] += 'a' - 'A'
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}
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return string(b[:i])
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}
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if Errno(errno) != ERANGE {
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return "strerror_r failure"
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}
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}
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}
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