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75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
//===--- Portability.h ------------------------------------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Includes stub APIs that make the portable runtime easier to write.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_PORTABILITY_H
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#define SWIFT_RUNTIME_PORTABILITY_H
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#include <cstdarg>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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size_t _swift_strlcpy(char *dst, const char *src, size_t maxlen);
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// Skip the attribute when included by the compiler.
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#ifdef SWIFT_RUNTIME_ATTRIBUTE_ALWAYS_INLINE
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SWIFT_RUNTIME_ATTRIBUTE_ALWAYS_INLINE
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#endif
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#ifdef __clang__
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__attribute((__format__(__printf__, 2, 0)))
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#endif
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inline static int
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swift_vasprintf(char **strp, const char *fmt, va_list args) {
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va_list args_for_len;
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va_copy(args_for_len, args);
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int len = vsnprintf(nullptr, 0, fmt, args_for_len);
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va_end(args_for_len);
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// If we fail for any reason, strp needs to be set to NULL.
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*strp = nullptr;
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if (len < 0)
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return -1;
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char *buffer = reinterpret_cast<char *>(malloc(len + 1));
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if (!buffer)
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return -1;
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int result = vsnprintf(buffer, len + 1, fmt, args);
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if (result < 0) {
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free(buffer);
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return -1;
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}
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*strp = buffer;
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return result;
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}
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// Skip the attribute when included by the compiler.
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#ifdef SWIFT_RUNTIME_ATTRIBUTE_ALWAYS_INLINE
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SWIFT_RUNTIME_ATTRIBUTE_ALWAYS_INLINE
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#endif
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#ifdef __clang__
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__attribute((__format__(__printf__, 2, 3)))
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#endif
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inline static int
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swift_asprintf(char **strp, const char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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int result = swift_vasprintf(strp, fmt, args);
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va_end(args);
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return result;
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}
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#endif
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