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nuttx-apps/nshlib
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Junbo Zheng c699b05f74 nshlib: add expr command support 
It is a mini version for the `expr` command, which implements the features of addition, subtraction, multiplication, division and mod.

Reference: https://www.geeksforgeeks.org/expr-command-in-linux-with-examples/

bl2>
bl2> expr 1 + 2
3
bl2> expr
Usage: expr <operand1> <operator> <operand2>
bl2> expr 5 - 2
3
bl2> set hello 10
bl2> expr $hello - 2
8
bl2> expr 8 a 9
Unknown operator
bl2> expr 20 / 5
4
bl2> expr 10 % 4
2
bl2> expr 10 / 0
operand2 invalid
bl2>
bl2> expr mi + 100
invalid parameter
bl2> expr 100 + mi
invalid parameter
bl2> expr 100 + 0
100

Signed-off-by: Junbo Zheng <zhengjunbo1@xiaomi.com>
2024-01-25 18:12:28 -08:00
..
CMakeLists.txt
nshlib: move etc romfs mount from nsh to nuttx
2024-01-09 21:25:19 -08:00
Kconfig
nshlib: add expr command support
2024-01-25 18:12:28 -08:00
Make.defs
Make.defs: Change "ifeq ($(XXX),y)" to "ifneq ($(XXX),)
2022-10-16 14:59:08 +02:00
Makefile
nshlib: move etc romfs mount from nsh to nuttx
2024-01-09 21:25:19 -08:00
nsh_alias.c
nsh_alias.c: unalias -a command does not work correctly
2023-09-25 21:05:37 +08:00
nsh_altconsole.c
Fix nsh_altconsole.c:152:41: error: implicit declaration of function 'strlen'
2023-09-26 00:31:09 +08:00
nsh_builtin.c
Fix nsh_builtin.c:91:22: error: 'SA_NOCLDWAIT' undeclared
2023-02-26 19:02:28 +02:00
nsh_codeccmd.c
Update nshlib/nsh_codeccmd.c
2023-09-21 10:48:29 +08:00
nsh_command.c
nshlib: add expr command support
2024-01-25 18:12:28 -08:00
nsh_console.c
nshlib: disable nsh error print if NSH_DISABLE_ERROR_PRINT enabled
2023-06-12 13:37:27 +08:00
nsh_console.h
nshlib/nsh_console.h: Add nsh_none, where any empty output can be forwarded
2023-08-25 17:18:35 +08:00
nsh_consolemain.c
nshlib/nsh_consolemain: detect null pointer
2023-08-29 03:11:28 +08:00
nsh_dbgcmds.c
nshlib: disable nsh error print if NSH_DISABLE_ERROR_PRINT enabled
2023-06-12 13:37:27 +08:00
nsh_ddcmd.c
nsh_ddcmd: print errno instead the return value when dd failed
2024-01-06 04:34:07 -08:00
nsh_envcmds.c
nshlib: add print negative number support for echo command
2023-07-31 07:58:41 -07:00
nsh_fileapps.c
nshlib/nsh_fileapps.c: Remove sched_lock() from nsh_fileapp()
2023-10-26 00:24:58 +08:00
nsh_fscmds.c
nshlib:dmesg add '-c|-C' opt
2023-12-14 20:14:25 -08:00
nsh_fsutils.c
nshlib: Fix static scanning errors
2023-09-08 18:49:31 +08:00
nsh_init.c
nshlib: move etc romfs mount from nsh to nuttx
2024-01-09 21:25:19 -08:00
nsh_login.c
Replace all strncpy with strlcpy
2023-05-08 21:35:16 +03:00
nsh_mmcmds.c
nsh_mmcmds: support "memdump -h/help" to show usage and sequence number
2024-01-06 04:34:27 -08:00
nsh_mntcmds.c
apps/nshlib: add the missing FAR macro for all source files
2022-09-22 14:22:13 +08:00
nsh_modcmds.c
nshlib: Remove the remaining CONFIG_FILE_STREAM dependence
2023-02-24 17:38:19 +08:00
nsh_netcmds.c
nshlib/ifconfig: Let "dns" option depends on CONFIG_NETDB_DNSCLIENT
2023-12-30 01:40:05 -08:00
nsh_parse.c
nsh/alias: Fix compiler warning
2023-08-01 08:13:23 -07:00
nsh_passwdcmds.c
apps/nshlib: add the missing FAR macro for all source files
2022-09-22 14:22:13 +08:00
nsh_printf.c
nshlib: Remove the remaining CONFIG_FILE_STREAM dependence
2023-02-24 17:38:19 +08:00
nsh_proccmds.c
apps/nshlib: Add the pidof command and API nsh_getpid
2023-08-29 02:58:45 +08:00
nsh_routecmds.c
fsutils/examples: Include unistd.h explicitly
2023-02-05 08:46:59 +02:00
nsh_script.c
nshlib: move etc romfs mount from nsh to nuttx
2024-01-09 21:25:19 -08:00
nsh_session.c
Indent the define statement by two spaces
2023-05-22 11:57:40 +02:00
nsh_syscmds.c
nshcmd/rptun: align help mesg with impl
2024-01-25 18:11:39 -08:00
nsh_system.c
nshlib: Remove the remaining CONFIG_FILE_STREAM dependence
2023-02-24 17:38:19 +08:00
nsh_telnetd.c
netutils: Support telnetd in the kernel mode
2022-11-07 15:24:08 +09:00
nsh_telnetlogin.c
Replace all strncpy with strlcpy
2023-05-08 21:35:16 +03:00
nsh_test.c
nshlib: add negative number logical judgement support for test and [ command
2023-07-30 22:20:02 -07:00
nsh_timcmds.c
Revert "nshlib/nsh_timcmds.c: Suppress warning about unused variable (errfmt)"
2023-08-25 17:18:35 +08:00
nsh_usbconsole.c
nsh_usbconsole.c: add support for NSH console over a composite device
2023-06-15 03:23:04 +08:00
nsh_usbtrace.c
nshlib: Remove the remaining CONFIG_FILE_STREAM dependence
2023-02-24 17:38:19 +08:00
nsh_vars.c
Replace all sprintf with snprintf
2023-05-08 21:35:16 +03:00
nsh.h
nshlib: move etc romfs mount from nsh to nuttx
2024-01-09 21:25:19 -08:00
rc.sysinit.template
nsh/script: support rc.sysinit script
2022-04-21 12:54:24 +03:00
rcS.template
nsh/script: support rc.sysinit script
2022-04-21 12:54:24 +03:00