apps/system/vi: Add new tiny VI work-alike editor. Still a work in progress.

ChangeLog.txt

@@ -802,3 +802,5 @@
 	* apps/nshlib/nsh.h, nsh_command.c, and nsh_parse.c:  Add a break
 	  command that can be executed with a loop to terminate the loop
 	  immediately (2014-1-17).
+	* apps/system/vi:  Add support for a tiny, VI work-alike editor.  This
+	  is still very much a work-in-progress on initial check-in (2014-1-20).

system/Kconfig

@@ -63,6 +63,10 @@ menu "USB Monitor"
 source "$APPSDIR/system/usbmonitor/Kconfig"
 endmenu
 
+menu "VI Work-Alike Editor"
+source "$APPSDIR/system/vi/Kconfig"
+endmenu
+
 menu "Stack Monitor"
 source "$APPSDIR/system/stackmonitor/Kconfig"
 endmenu

system/Make.defs

@@ -2,7 +2,7 @@
 # apps/system/Make.defs
 # Adds selected applications to apps/ build
 #
-#   Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2012-2014 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -102,6 +102,10 @@ ifeq ($(CONFIG_SYSTEM_USBMSC),y)
 CONFIGURED_APPS += system/usbmsc
 endif
 
+ifeq ($(CONFIG_SYSTEM_VI),y)
+CONFIGURED_APPS += system/vi
+endif
+
 ifeq ($(CONFIG_SYSTEM_ZMODEM),y)
 CONFIGURED_APPS += system/zmodem
 endif

system/Makefile

@@ -1,7 +1,7 @@
 ############################################################################
 # apps/system/Makefile
 #
-#   Copyright (C) 2011-2013 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2011-2014 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -39,7 +39,7 @@
 
 SUBDIRS  = cdcacm composite flash_eraseall free i2c inifile install
 SUBDIRS += nxplayer poweroff ramtest ramtron readline sdcard stackmonitor
-SUBDIRS += sysinfo usbmonitor usbmsc zmodem
+SUBDIRS += sysinfo usbmonitor usbmsc vi zmodem
 
 # Create the list of installed runtime modules (INSTALLED_DIRS)
 

system/vi/Kconfig

@@ -0,0 +1,56 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+config SYSTEM_VI
+	bool "Tiny VI work-alike text editor"
+	default n
+	---help---
+		Enable support for NuttX tiny VI work-alike editor.
+
+		Omitted features:
+			- No keypad cursor control support
+			- No word oriented operations.
+
+		Assumptions and Limitations:
+			- A VT100 host terminal is assumed.
+			- A fixed width character set (like Courier) is assumed
+			- Files are edited in memory so unless you have a lot of memory
+			  to spare, this editor will only be useful for very small files.
+
+if SYSTEM_VI
+
+config SYSTEM_VI_COLS
+	int "Display width (columns)"
+	default 64
+	---help---
+		The editor does not have the capability to query the display for
+		its width or height.  This setting provides the default width of
+		the display in columns.  The actually width can be overridden using
+		command line options.
+
+config SYSTEM_VI_ROWS
+	int "Display height (rows)"
+	default 16
+	---help---
+		The editor does not have the capability to query the display for
+		its width or height.  This setting provides the default height of
+		the display in rows.  The actually width can be overridden using
+		command line options.
+
+config SYSTEM_VI_DEBUGLEVEL
+	int "Debug level"
+	default 0
+	range 0 2
+	---help---
+		0=Debug off; 1=Print errors on console; 2=Print debug information
+		on the console.
+
+		Debug output is generated with syslog.  The editor works on
+		/dev/console.  In order to get both a usable display and also
+		readable debug output, syslog'ing should sent to some device other
+		than /dev/console (which is the default).
+
+endif
+

system/vi/Makefile

@@ -0,0 +1,116 @@
+############################################################################
+# apps/system/vi/Makefile
+#
+#   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/.config
+-include $(TOPDIR)/Make.defs
+include $(APPDIR)/Make.defs
+
+ifeq ($(WINTOOL),y)
+INCDIROPT	= -w
+endif
+
+# Hello Application
+# TODO: appname can be automatically extracted from the directory name
+
+APPNAME		= vi
+PRIORITY	= SCHED_PRIORITY_DEFAULT
+STACKSIZE	= 1024
+
+ASRCS		=
+CSRCS		= vi.c
+
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+  BIN		= ..\..\libapps$(LIBEXT)
+else
+ifeq ($(WINTOOL),y)
+  BIN		= ..\\..\\libapps$(LIBEXT)
+else
+  BIN		= ../../libapps$(LIBEXT)
+endif
+endif
+
+ROOTDEPPATH	= --dep-path .
+
+# Common build
+
+VPATH		= 
+
+all:	.built
+.PHONY: context depend clean distclean
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+.built: $(OBJS)
+	$(call ARCHIVE, $(BIN), $(OBJS))
+	$(Q) touch .built
+
+# Register application
+
+ifeq ($(CONFIG_NSH_BUILTIN_APPS),y)
+$(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat: $(DEPCONFIG) Makefile
+	$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
+
+context: $(BUILTIN_REGISTRY)$(DELIM)$(APPNAME)_main.bdat
+else
+context:
+endif
+
+# Create dependencies
+
+.depend: Makefile $(SRCS)
+	$(Q) $(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
+	$(Q) touch $@
+
+depend: .depend
+
+clean:
+	$(call DELFILE, .built)
+	$(call CLEAN)
+
+distclean: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep