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nuttx/libs/libc
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hanzhijian 87d84e437a libc/crc32: add IEEE-compatible crc32_ieee for Linux/zlib interop 
Add crc32_ieee() and crc32_ieeepart() that produce CRC32 values
compatible with Linux/zlib. The difference from the existing crc32():

  crc32():        init=0, no final XOR (NuttX native)
  crc32_ieee():   init=0xFFFFFFFF, final XOR 0xFFFFFFFF (Linux/zlib)

The existing crc32() and crc32part() are unchanged to avoid breaking
existing callers (bbsram, sbram, etc.).

New functions:
  crc32_ieee(src, len)              - full CRC, Linux-compatible
  crc32_ieeepart(src, len, crcval)  - incremental CRC, Linux-compatible

Verified on sim:nsh against known Linux zlib test vectors:
  crc32_ieee("hello")     = 0x3610a686 (Linux: 0x3610a686) PASS
  crc32_ieee("123456789") = 0xcbf43926 (Linux: 0xcbf43926) PASS
  crc32_ieee("")           = 0x00000000 (Linux: 0x00000000) PASS
  crc32_ieeepart incremental  = 0xcbf43926               PASS
  crc32("hello")          = 0xf032519b (unchanged)       PASS

Signed-off-by: hanzhijian <hanzhijian@zepp.com>
2026-07-03 10:18:28 +08:00
..
aio include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
assert lib_stackchk.c: a duplicate implementation error reported during compilation 2026-02-02 13:22:07 +08:00
audio include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
builtin libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
ctype style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
dirent libs/libc/dirent: preserve errno on readdir() end-of-directory 2026-06-02 23:34:25 +08:00
dlfcn include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
elf include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
errno libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
eventfd libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
fdt libs/libc/fdt/Make.defs: cannot move due to directory not empty bugfix 2024-10-09 15:42:17 +08:00
fixedmath !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
gdbstub arch/arm64: fix backtrace register access and gdbstub config guard 2026-01-16 08:55:47 -03:00
gnssutils libc: remove reference to non-existent readme 2025-10-11 17:07:51 -04:00
grp libc/grp: add getgrouplist() 2026-06-23 23:09:22 +08:00
hex2bin include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
inttypes !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
libgen libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
locale style/FAR: remove FAR qualifier 2025-11-10 10:56:29 +01:00
lzf !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
machine arch/tricore: Full implementation of setjmp and longjmp. 2026-05-22 00:38:02 +08:00
misc libc/crc32: add IEEE-compatible crc32_ieee for Linux/zlib interop 2026-07-03 10:18:28 +08:00
net include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
netdb !sys/types.h: change time_t and clock_t to int64_t to align with other OSes 2026-05-19 16:21:28 +08:00
obstack include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
pthread arch, sched/signal: Fix compilation with ENABLE_PARTIAL_SIGNALS=y 2026-06-16 17:07:32 +08:00
pwd libs/libc/unistd: add getspnam function 2024-10-16 11:15:25 +08:00
queue libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
regex libs/libc/regex: remove logically dead code in regcomp.c 2026-01-24 19:28:56 +08:00
sched include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
search libc/search: add foreach api for hcreate_data 2025-12-25 09:39:03 +08:00
semaphore pthread: move pthread_cond to userspace 2026-01-26 16:26:39 +08:00
signal sched/signal: Add support for disabling all signal functions 2026-01-18 08:24:13 -03:00
spawn include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
stdio !include/fcntl.h: align open flags with Linux values 2026-06-30 13:43:44 +08:00
stdlib !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
stream syslog: avoid an infinite loop if one channel fails 2026-06-23 22:45:01 +08:00
string !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
symtab include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
syslog drivers/syslog: Add RFC 5424 protocol support 2025-06-13 20:26:57 +08:00
termios drivers/serial: add job-control TTY ioctls and libc wrappers 2026-06-23 16:26:53 -03:00
time libs/libc/time: Add configuration options for the strftime 2026-06-04 14:29:33 +08:00
tls libc/tls: update preprocessor condition comment to match implementation 2026-01-31 02:49:10 +08:00
uio move readv/writev to the kernel 2024-10-30 17:07:54 +08:00
unistd libc/unistd: add getgroups() 2026-06-24 14:55:11 -03:00
userfs include/debug.h: Move to include/nuttx/debug.h 2026-04-07 07:50:06 -03:00
uuid libc: Refine the arc4random_buf implementation 2024-10-26 18:04:21 -03:00
wchar style: fix spelling in code comments and strings 2025-05-23 10:48:41 +08:00
wctype libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
wqueue !sched/clock: remove CONFIG_SYSTEM_TIME64 and always use 64-bit time 2026-05-19 16:21:28 +08:00
zoneinfo Makefile: Remove make depend files by make distclean 2026-02-16 16:27:57 +01:00
.gitignore libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
CMakeLists.txt libs/libc: migrate to SPDX identifier 2024-10-01 12:25:52 +08:00
Kconfig libc/elf: rename modlib to libelf 2025-04-11 09:43:22 +08:00
libc.csv !compiler: drop CONFIG_HAVE_LONG_LONG and require long long support 2026-05-19 16:21:28 +08:00
libc.h libc/machine:Add prefixes to libc functions implemented by arch 2024-10-31 18:11:16 +08:00
limits_check.c libs/libc: add limits checks 2026-07-02 09:02:21 -03:00
Makefile libs/libc: add limits checks 2026-07-02 09:02:21 -03:00