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Merge branch 'bugfix/newlib_FD_ISSET_v4.0' into 'release/v4.0'

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newlib: Fix a case in FD_ISSET macro when n==-1 (v4.0)

See merge request espressif/esp-idf!13693
This commit is contained in:
Zim Kalinowski 2021-07-19 09:45:25 +00:00
commit 3d5fdbfa1d
1 changed files with 13 additions and 0 deletions
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13
components/newlib/platform_include/sys/select.h
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@ -34,4 +34,17 @@ int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct
#endif // fd_set
#if defined(FD_ISSET) || defined(FD_SET) || defined(FD_CLR)
#undef FD_SET
#undef FD_CLR
#undef FD_ISSET
#define __FD_SAFE_SET(n, code) do { if ((unsigned)(n) < FD_SETSIZE) { code; } } while(0)
#define __FD_SAFE_GET(n, code) (((unsigned)(n) < FD_SETSIZE) ? (code) : 0)
#define FD_SET(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] |= (1L << ((n) % NFDBITS))))
#define FD_CLR(n, p) __FD_SAFE_SET(n, ((p)->fds_bits[(n) / NFDBITS] &= ~(1L << ((n) % NFDBITS))))
#define FD_ISSET(n, p) __FD_SAFE_GET(n, ((p)->fds_bits[(n) / NFDBITS] & (1L << ((n) % NFDBITS))))
#endif // FD_ISSET || FD_SET || FD_CLR
#endif //__ESP_SYS_SELECT_H__