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7f96069954
Up-to-date trunk clang has introduced a built-in operator called _Countof, which is like the 'lenof' macro in this code (returns the number of elements in a statically-declared array object) but with the safety advantage that it provokes a compile error if you accidentally use it on a pointer. In this commit I add a cmake-time check for it, and conditional on that, switch over the definition of lenof. This should add a safety check for accidental uses of lenof(pointer). When I tested it with new clang, this whole code base compiled cleanly with the new setting, so there aren't currently any such accidents. clang cites C2y as the source for _Countof: WG14 document N3369 initially proposed it under a different name, and then there was a big internet survey about naming (in which of course I voted for lenof!), and document N3469 summarises the results, which show that the name _Countof and/or countof won. Links: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3369.pdf https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3469.htm My reading of N3469 seems to say that there will _either_ be _Countof by itself, _or_ lowercase 'countof' as a new keyword, but they don't say which. They say they _don't_ intend to do the same equivocation we had with _Complex and _Bool, where you have a _Countof keyword and an optional header file defining a lowercase non-underscore macro wrapping it. But there hasn't been a new whole draft published since N3469 yet, so I don't know what will end up in it when there is. However, as of now, _Countof exists in at least one compiler, and that seems like enough reason to implement it here. If it becomes 'countof' in the real standard, then we can always change over later. (And in that case it would probably make sense to rename the macro throughout the code base to align with what will become the new standard usage.)
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
#cmakedefine NO_IPV6
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#cmakedefine NO_GSSAPI
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#cmakedefine STATIC_GSSAPI
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#cmakedefine NO_SCROLLBACK_COMPRESSION
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#cmakedefine NO_MULTIMON
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#cmakedefine01 HAVE_COUNTOF
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#cmakedefine01 HAVE_WINRESRC_H
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#cmakedefine01 HAVE_WINRES_H
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#cmakedefine01 HAVE_WIN_H
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#cmakedefine01 HAVE_NO_STDINT_H
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#cmakedefine01 HAVE_AFUNIX_H
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#cmakedefine01 HAVE_GCP_RESULTSW
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#cmakedefine01 HAVE_ADDDLLDIRECTORY
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#cmakedefine01 HAVE_GETNAMEDPIPECLIENTPROCESSID
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#cmakedefine01 HAVE_SETDEFAULTDLLDIRECTORIES
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#cmakedefine01 HAVE_STRTOUMAX
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#cmakedefine01 HAVE_DWMAPI_H
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#cmakedefine NOT_X_WINDOWS
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#cmakedefine OMIT_UTMP
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#cmakedefine01 HAVE_ASM_HWCAP_H
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#cmakedefine01 HAVE_SYS_AUXV_H
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#cmakedefine01 HAVE_SYS_SYSCTL_H
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#cmakedefine01 HAVE_SYS_TYPES_H
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#cmakedefine01 HAVE_GLOB_H
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#cmakedefine01 HAVE_UTMP_H
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#cmakedefine01 HAVE_FUTIMES
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#cmakedefine01 HAVE_GETADDRINFO
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#cmakedefine01 HAVE_POSIX_OPENPT
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#cmakedefine01 HAVE_PTSNAME
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#cmakedefine01 HAVE_SETRESUID
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#cmakedefine01 HAVE_SETRESGID
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#cmakedefine01 HAVE_STRSIGNAL
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#cmakedefine01 HAVE_UPDWTMPX
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#cmakedefine01 HAVE_FSTATAT
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#cmakedefine01 HAVE_DIRFD
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#cmakedefine01 HAVE_SETPWENT
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#cmakedefine01 HAVE_ENDPWENT
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#cmakedefine01 HAVE_GETAUXVAL
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#cmakedefine01 HAVE_ELF_AUX_INFO
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#cmakedefine01 HAVE_SYSCTLBYNAME
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#cmakedefine01 HAVE_CLOCK_MONOTONIC
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#cmakedefine01 HAVE_CLOCK_GETTIME
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#cmakedefine01 HAVE_SO_PEERCRED
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#cmakedefine01 HAVE_NULLARY_SETPGRP
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#cmakedefine01 HAVE_BINARY_SETPGRP
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#cmakedefine01 HAVE_PANGO_FONT_FAMILY_IS_MONOSPACE
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#cmakedefine01 HAVE_PANGO_FONT_MAP_LIST_FAMILIES
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#cmakedefine01 HAVE_G_APPLICATION_DEFAULT_FLAGS
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#cmakedefine01 HAVE_AES_NI
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#cmakedefine01 HAVE_SHA_NI
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#cmakedefine01 HAVE_SHAINTRIN_H
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#cmakedefine01 HAVE_CLMUL
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#cmakedefine01 HAVE_NEON_CRYPTO
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#cmakedefine01 HAVE_NEON_PMULL
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#cmakedefine01 HAVE_NEON_VADDQ_P128
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#cmakedefine01 HAVE_NEON_SHA512
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#cmakedefine01 HAVE_NEON_SHA512_INTRINSICS
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#cmakedefine01 USE_ARM64_NEON_H
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#cmakedefine01 HAVE_ARM_DIT
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