mirror of https://github.com/ArduPilot/ardupilot
16 lines
776 B
C
16 lines
776 B
C
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#include_next <string.h>
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// Necessary for toolchains that does not provide `strndupa`, such as musl.
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#if !defined(HAVE_DECL_STRNDUPA) && !defined(strndupa)
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// The last value of the GCC extension "statement exprs" will be
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// evaluated and returned, E.g: `#define foo(n) ({ n; })` is equivalent for
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// `auto foo(auto n) { return n; }`
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#define strndupa(old_string, len) \
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({ \
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const size_t string_len = strnlen(old_string, len); \
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char *new_string = static_cast<char*>(alloca(string_len + 1)); \
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new_string[string_len] = '\0'; \
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static_cast<char*>(memcpy(new_string, old_string, len)); \
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})
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#endif
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