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stdlib: Implement mbrtoc8, c8rtomb, and the char8_t typedef.

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This change provides implementations for the mbrtoc8 and c8rtomb
functions adopted for C++20 via WG21 P0482R6 and for C2X via WG14
N2653.  It also provides the char8_t typedef from WG14 N2653.

The mbrtoc8 and c8rtomb functions are declared in uchar.h in C2X
mode or when the _GNU_SOURCE macro or C++20 __cpp_char8_t feature
test macro is defined.

The char8_t typedef is declared in uchar.h in C2X mode or when the
_GNU_SOURCE macro is defined and the C++20 __cpp_char8_t feature
test macro is not defined (if __cpp_char8_t is defined, then char8_t
is a builtin type).

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Tom Honermann
2022-06-30 08:52:14 -04:00
committed by Adhemerval Zanella
parent 598f790fb1
commit 8bcca1db3d
40 changed files with 360 additions and 1 deletions
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2
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
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@@ -2748,10 +2748,12 @@ GLIBC_2.35 __memcmpeq F
GLIBC_2.35 _dl_find_object F
GLIBC_2.35 epoll_pwait2 F
GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
GLIBC_2.36 c8rtomb F
GLIBC_2.36 fsconfig F
GLIBC_2.36 fsmount F
GLIBC_2.36 fsopen F
GLIBC_2.36 fspick F
GLIBC_2.36 mbrtoc8 F
GLIBC_2.36 mount_setattr F
GLIBC_2.36 move_mount F
GLIBC_2.36 open_tree F

2
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@@ -2574,10 +2574,12 @@ GLIBC_2.35 __memcmpeq F
GLIBC_2.35 _dl_find_object F
GLIBC_2.35 epoll_pwait2 F
GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
GLIBC_2.36 c8rtomb F
GLIBC_2.36 fsconfig F
GLIBC_2.36 fsmount F
GLIBC_2.36 fsopen F
GLIBC_2.36 fspick F
GLIBC_2.36 mbrtoc8 F
GLIBC_2.36 mount_setattr F
GLIBC_2.36 move_mount F
GLIBC_2.36 open_tree F