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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
NEWS
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@ -51,6 +51,15 @@ Major new features:
Previously, input bytes not within the ASCII range resulted in
unpredictable output.
* Support for the mbrtoc8 and c8rtomb multibyte/UTF-8 character conversion
functions has been added per the ISO C2X N2653 and C++20 P0482R6 proposals.
Support for the char8_t typedef has been added per the ISO C2X N2653
proposal. The 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).
Deprecated and removed features, and other changes affecting compatibility:
* Support for prelink will be removed in the next release; this includes

2
sysdeps/mach/hurd/i386/libc.abilist
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@ -2289,6 +2289,8 @@ GLIBC_2.35 __memcmpeq F
GLIBC_2.35 _dl_find_object F
GLIBC_2.35 close_range F
GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
GLIBC_2.36 c8rtomb F
GLIBC_2.36 mbrtoc8 F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F

2
sysdeps/unix/sysv/linux/aarch64/libc.abilist
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@ -2616,10 +2616,12 @@ 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/alpha/libc.abilist
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@ -2713,10 +2713,12 @@ 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/arc/libc.abilist
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@ -2377,10 +2377,12 @@ 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/arm/be/libc.abilist
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@ -496,10 +496,12 @@ 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/arm/le/libc.abilist
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@ -493,10 +493,12 @@ 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/csky/libc.abilist
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@ -2652,10 +2652,12 @@ 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/hppa/libc.abilist
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@ -2601,10 +2601,12 @@ 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/i386/libc.abilist
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@ -2785,10 +2785,12 @@ 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/ia64/libc.abilist
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@ -2551,10 +2551,12 @@ 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/m68k/coldfire/libc.abilist
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@ -497,10 +497,12 @@ 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/m68k/m680x0/libc.abilist
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@ -2728,10 +2728,12 @@ 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/microblaze/be/libc.abilist
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@ -2701,10 +2701,12 @@ 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/microblaze/le/libc.abilist
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@ -2698,10 +2698,12 @@ 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/mips/mips32/fpu/libc.abilist
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@ -2693,10 +2693,12 @@ 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/mips/mips32/nofpu/libc.abilist
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@ -2691,10 +2691,12 @@ 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/mips/mips64/n32/libc.abilist
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@ -2699,10 +2699,12 @@ 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/mips/mips64/n64/libc.abilist
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@ -2602,10 +2602,12 @@ 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/nios2/libc.abilist
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@ -2740,10 +2740,12 @@ 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/or1k/libc.abilist
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@ -2123,10 +2123,12 @@ GLIBC_2.35 wprintf F
GLIBC_2.35 write F
GLIBC_2.35 writev F
GLIBC_2.35 wscanf 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/powerpc/powerpc32/fpu/libc.abilist
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@ -2755,10 +2755,12 @@ 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/powerpc/powerpc32/nofpu/libc.abilist
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@ -2788,10 +2788,12 @@ 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/powerpc/powerpc64/be/libc.abilist
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@ -2510,10 +2510,12 @@ 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/powerpc/powerpc64/le/libc.abilist
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@ -2812,10 +2812,12 @@ 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/riscv/rv32/libc.abilist
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@ -2379,10 +2379,12 @@ 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/riscv/rv64/libc.abilist
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@ -2579,10 +2579,12 @@ 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/s390/s390-32/libc.abilist
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@ -2753,10 +2753,12 @@ 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/s390/s390-64/libc.abilist
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@ -2547,10 +2547,12 @@ 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/sh/be/libc.abilist
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@ -2608,10 +2608,12 @@ 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/sh/le/libc.abilist
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@ -2605,10 +2605,12 @@ 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/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
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@ -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

2
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
View File

@ -2525,10 +2525,12 @@ 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/x86_64/x32/libc.abilist
View File

@ -2631,10 +2631,12 @@ 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
wcsmbs/Makefile
View File

@ -42,7 +42,7 @@ routines := wcscat wcschr wcscmp wcscpy wcscspn wcsdup wcslen wcsncat \
wcsmbsload mbsrtowcs_l \
isoc99_wscanf isoc99_vwscanf isoc99_fwscanf isoc99_vfwscanf \
isoc99_swscanf isoc99_vswscanf \
mbrtoc16 c16rtomb mbrtoc32 c32rtomb
mbrtoc8 c8rtomb mbrtoc16 c16rtomb mbrtoc32 c32rtomb
strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \
wcpcpy wcsncpy wcpncpy wcscat wcsncat wcschrnul wcsspn wcspbrk \

3
wcsmbs/Versions
View File

@ -49,4 +49,7 @@ libc {
wcstof32; wcstof64; wcstof32x;
wcstof32_l; wcstof64_l; wcstof32x_l;
}
GLIBC_2.36 {
c8rtomb; mbrtoc8;
}
}

132
wcsmbs/c8rtomb.c Normal file
View File

@ -0,0 +1,132 @@
/* UTF-8 to multibyte conversion.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <uchar.h>
#include <wchar.h>
/* This is the private state used if PS is NULL. */
static mbstate_t state;
size_t
c8rtomb (char *s, char8_t c8, mbstate_t *ps)
{
/* This implementation depends on the converter invoked by wcrtomb not
needing to retain state in either the top most bit of ps->__count or
in ps->__value between invocations. This implementation uses the
top most bit of ps->__count to indicate that trailing code units are
expected and uses ps->__value to store previously seen code units. */
wchar_t wc;
if (ps == NULL)
ps = &state;
if (s == NULL)
{
/* if 's' is a null pointer, behave as if u8'\0' was passed as 'c8'. If
this occurs for an incomplete code unit sequence, then an error will
be reported below. */
c8 = u8""[0];
}
if (! (ps->__count & 0x80000000))
{
/* Initial state. */
if ((c8 >= 0x80 && c8 <= 0xC1) || c8 >= 0xF5)
{
/* An invalid lead code unit. */
__set_errno (EILSEQ);
return -1;
}
if (c8 >= 0xC2)
{
/* A valid lead code unit. */
ps->__count |= 0x80000000;
ps->__value.__wchb[0] = c8;
ps->__value.__wchb[3] = 1;
return 0;
}
/* A single byte (ASCII) code unit. */
wc = c8;
}
else
{
char8_t cu1 = ps->__value.__wchb[0];
if (ps->__value.__wchb[3] == 1)
{
/* A single lead code unit was previously seen. */
if ((c8 < 0x80 || c8 > 0xBF)
|| (cu1 == 0xE0 && c8 < 0xA0)
|| (cu1 == 0xED && c8 > 0x9F)
|| (cu1 == 0xF0 && c8 < 0x90)
|| (cu1 == 0xF4 && c8 > 0x8F))
{
/* An invalid second code unit. */
__set_errno (EILSEQ);
return -1;
}
if (cu1 >= 0xE0)
{
/* A three or four code unit sequence. */
ps->__value.__wchb[1] = c8;
++ps->__value.__wchb[3];
return 0;
}
wc = ((cu1 & 0x1F) << 6)
+ (c8 & 0x3F);
}
else
{
char8_t cu2 = ps->__value.__wchb[1];
/* A three or four byte code unit sequence. */
if (c8 < 0x80 || c8 > 0xBF)
{
/* An invalid third or fourth code unit. */
__set_errno (EILSEQ);
return -1;
}
if (ps->__value.__wchb[3] == 2 && cu1 >= 0xF0)
{
/* A four code unit sequence. */
ps->__value.__wchb[2] = c8;
++ps->__value.__wchb[3];
return 0;
}
if (cu1 < 0xF0)
{
wc = ((cu1 & 0x0F) << 12)
+ ((cu2 & 0x3F) << 6)
+ (c8 & 0x3F);
}
else
{
char8_t cu3 = ps->__value.__wchb[2];
wc = ((cu1 & 0x07) << 18)
+ ((cu2 & 0x3F) << 12)
+ ((cu3 & 0x3F) << 6)
+ (c8 & 0x3F);
}
}
ps->__count &= 0x7fffffff;
ps->__value.__wch = 0;
}
return wcrtomb (s, wc, ps);
}

126
wcsmbs/mbrtoc8.c Normal file
View File

@ -0,0 +1,126 @@
/* Multibyte to UTF-8 conversion.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <assert.h>
#include <dlfcn.h>
#include <errno.h>
#include <gconv.h>
#include <uchar.h>
#include <wcsmbsload.h>
#include <sysdep.h>
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
/* This is the private state used if PS is NULL. */
static mbstate_t state;
size_t
mbrtoc8 (char8_t *pc8, const char *s, size_t n, mbstate_t *ps)
{
/* This implementation depends on the converter invoked by mbrtowc not
needing to retain state in either the top most bit of ps->__count or
in ps->__value between invocations. This implementation uses the
top most bit of ps->__count to indicate that trailing code units are
yet to be written and uses ps->__value to store those code units. */
if (ps == NULL)
ps = &state;
/* If state indicates that trailing code units are yet to be written, write
those first regardless of whether 's' is a null pointer. */
if (ps->__count & 0x80000000)
{
/* ps->__value.__wchb[3] stores the index of the next code unit to
write. Code units are stored in reverse order. */
size_t i = ps->__value.__wchb[3];
if (pc8 != NULL)
{
*pc8 = ps->__value.__wchb[i];
}
if (i == 0)
{
ps->__count &= 0x7fffffff;
ps->__value.__wch = 0;
}
else
--ps->__value.__wchb[3];
return -3;
}
if (s == NULL)
{
/* if 's' is a null pointer, behave as if a null pointer was passed for
'pc8', an empty string was passed for 's', and 1 passed for 'n'. */
pc8 = NULL;
s = "";
n = 1;
}
wchar_t wc;
size_t result;
result = mbrtowc (&wc, s, n, ps);
if (result <= n)
{
if (wc <= 0x7F)
{
if (pc8 != NULL)
*pc8 = wc;
}
else if (wc <= 0x7FF)
{
if (pc8 != NULL)
*pc8 = 0xC0 + ((wc >> 6) & 0x1F);
ps->__value.__wchb[0] = 0x80 + (wc & 0x3F);
ps->__value.__wchb[3] = 0;
ps->__count |= 0x80000000;
}
else if (wc <= 0xFFFF)
{
if (pc8 != NULL)
*pc8 = 0xE0 + ((wc >> 12) & 0x0F);
ps->__value.__wchb[1] = 0x80 + ((wc >> 6) & 0x3F);
ps->__value.__wchb[0] = 0x80 + (wc & 0x3F);
ps->__value.__wchb[3] = 1;
ps->__count |= 0x80000000;
}
else if (wc <= 0x10FFFF)
{
if (pc8 != NULL)
*pc8 = 0xF0 + ((wc >> 18) & 0x07);
ps->__value.__wchb[2] = 0x80 + ((wc >> 12) & 0x3F);
ps->__value.__wchb[1] = 0x80 + ((wc >> 6) & 0x3F);
ps->__value.__wchb[0] = 0x80 + (wc & 0x3F);
ps->__value.__wchb[3] = 2;
ps->__count |= 0x80000000;
}
}
if (result == 0 && wc != 0)
{
/* mbrtowc() never returns -3. When a MB sequence converts to multiple
WCs, no input is consumed when writing the subsequent WCs resulting
in a result of 0 even if a null character wasn't written. */
result = -3;
}
return result;
}

21
wcsmbs/uchar.h
View File

@ -31,6 +31,13 @@
#include <bits/types.h>
#include <bits/types/mbstate_t.h>
/* Declare the C2x char8_t typedef in C2x modes, but only if the C++
__cpp_char8_t feature test macro is not defined. */
#if __GLIBC_USE (ISOC2X) && !defined __cpp_char8_t
/* Define the 8-bit character type. */
typedef unsigned char char8_t;
#endif
#ifndef __USE_ISOCXX11
/* Define the 16-bit and 32-bit character types. */
typedef __uint_least16_t char16_t;
@ -40,6 +47,20 @@ typedef __uint_least32_t char32_t;
__BEGIN_DECLS
/* Declare the C2x mbrtoc8() and c8rtomb() functions in C2x modes or if
the C++ __cpp_char8_t feature test macro is defined. */
#if __GLIBC_USE (ISOC2X) || defined __cpp_char8_t
/* Write char8_t representation of multibyte character pointed
to by S to PC8. */
extern size_t mbrtoc8 (char8_t *__restrict __pc8,
const char *__restrict __s, size_t __n,
mbstate_t *__restrict __p) __THROW;
/* Write multibyte representation of char8_t C8 to S. */
extern size_t c8rtomb (char *__restrict __s, char8_t __c8,
mbstate_t *__restrict __ps) __THROW;
#endif
/* Write char16_t representation of multibyte character pointed
to by S to PC16. */
extern size_t mbrtoc16 (char16_t *__restrict __pc16,