Ticket #4316: add basic Ngspice syntax highlighting.

Add basic support for highlighting Ngspice/SPICE (http://ngspice.sourceforge.net/)
circuit description files syntax. Two main contexts are defined:
- the default context, where the circuit is described,
- the control script context (between .control and .endc).

The default context highlights dot commands, circuit element instance
names and model types. The control script context highlights supported
functions/commands and known variables. Both contexts highlight comments
and line continuation marks.

Other than two FIXMEs, it is a known issue the first line of the file is
part of the default context, while in most cases it would contain the
file title.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

misc/syntax/Makefile.am

@@ -80,6 +80,7 @@ SYNTAXFILES =			\
 	slang.syntax		\
 	smalltalk.syntax	\
 	spec.syntax		\
+	spice.syntax		\
 	sql.syntax		\
 	strace.syntax 		\
 	swift.syntax		\

misc/syntax/Syntax.in

@@ -70,6 +70,9 @@ include html.syntax
 file ..\*\\.((?i:xml|xsd|xslt?|dtd)|qpg|qpg\\.in)$ XML\sdocument (\\?xml\sversion|!DOCTYPE\s)
 include xml.syntax
 
+file ..\*\\.cir$ Spice\scircuit
+include spice.syntax
+
 file ..\*\\.(?i:tt)$ Template::Toolkit\sFile
 include tt.syntax
 

misc/syntax/spice.syntax

@@ -0,0 +1,421 @@
+caseinsensitive
+
+context default
+    keyword linestart \**\n brown
+    keyword $*\n brown
+    keyword ;*\n brown
+    keyword //*\n brown
+    keyword linestart \+ red
+
+    # dot commands
+    keyword whole .ac brightmagenta
+    keyword whole .csparam brightmagenta
+    keyword whole .dc brightmagenta
+    keyword whole .disto brightmagenta
+    keyword whole .else brightmagenta
+    keyword whole .elseif brightmagenta
+    keyword whole .end brightmagenta
+    keyword whole .endif brightmagenta
+    keyword whole .ends brightmagenta
+    keyword whole .four brightmagenta
+    keyword whole .func brightmagenta
+    keyword whole .global brightmagenta
+    keyword whole .ic brightmagenta
+    keyword whole .if brightmagenta
+    keyword whole .include brightmagenta
+    keyword whole .lib brightmagenta
+    keyword whole .meas brightmagenta
+    keyword whole .model brightmagenta
+    keyword whole .nodeset brightmagenta
+    keyword whole .noise brightmagenta
+    keyword whole .op brightmagenta
+    keyword whole .options brightmagenta
+    keyword whole .param brightmagenta
+    keyword whole .plot brightmagenta
+    keyword whole .print brightmagenta
+    keyword whole .probe brightmagenta
+    keyword whole .pss brightmagenta
+    keyword whole .pz brightmagenta
+    keyword whole .save brightmagenta
+    keyword whole .sens brightmagenta
+    keyword whole .subckt brightmagenta
+    keyword whole .temp brightmagenta
+    keyword whole .tf brightmagenta
+    keyword whole .title brightmagenta
+    keyword whole .tran brightmagenta
+    keyword whole .width brightmagenta
+
+    # circuit elements
+    keyword wholeleft linestart A*\s brightcyan
+    keyword wholeleft linestart A*\t brightcyan
+    keyword wholeleft linestart B*\s brightcyan
+    keyword wholeleft linestart B*\t brightcyan
+    keyword wholeleft linestart C*\s brightcyan
+    keyword wholeleft linestart C*\t brightcyan
+    keyword wholeleft linestart D*\s brightcyan
+    keyword wholeleft linestart D*\t brightcyan
+    keyword wholeleft linestart E*\s brightcyan
+    keyword wholeleft linestart E*\t brightcyan
+    keyword wholeleft linestart F*\s brightcyan
+    keyword wholeleft linestart F*\t brightcyan
+    keyword wholeleft linestart G*\s brightcyan
+    keyword wholeleft linestart G*\t brightcyan
+    keyword wholeleft linestart H*\s brightcyan
+    keyword wholeleft linestart H*\t brightcyan
+    keyword wholeleft linestart I*\s brightcyan
+    keyword wholeleft linestart I*\t brightcyan
+    keyword wholeleft linestart J*\s brightcyan
+    keyword wholeleft linestart J*\t brightcyan
+    keyword wholeleft linestart K*\s brightcyan
+    keyword wholeleft linestart K*\t brightcyan
+    keyword wholeleft linestart L*\s brightcyan
+    keyword wholeleft linestart L*\t brightcyan
+    keyword wholeleft linestart M*\s brightcyan
+    keyword wholeleft linestart M*\t brightcyan
+    keyword wholeleft linestart N*\s brightcyan
+    keyword wholeleft linestart N*\t brightcyan
+    keyword wholeleft linestart O*\s brightcyan
+    keyword wholeleft linestart O*\t brightcyan
+    keyword wholeleft linestart P*\s brightcyan
+    keyword wholeleft linestart P*\t brightcyan
+    keyword wholeleft linestart Q*\s brightcyan
+    keyword wholeleft linestart Q*\t brightcyan
+    keyword wholeleft linestart R*\s brightcyan
+    keyword wholeleft linestart R*\t brightcyan
+    keyword wholeleft linestart S*\s brightcyan
+    keyword wholeleft linestart S*\t brightcyan
+    keyword wholeleft linestart T*\s brightcyan
+    keyword wholeleft linestart T*\t brightcyan
+    keyword wholeleft linestart U*\s brightcyan
+    keyword wholeleft linestart U*\t brightcyan
+    keyword wholeleft linestart V*\s brightcyan
+    keyword wholeleft linestart V*\t brightcyan
+    keyword wholeleft linestart W*\s brightcyan
+    keyword wholeleft linestart W*\t brightcyan
+    keyword wholeleft linestart X*\s brightcyan
+    keyword wholeleft linestart X*\t brightcyan
+    keyword wholeleft linestart Y*\s brightcyan
+    keyword wholeleft linestart Y*\t brightcyan
+    keyword wholeleft linestart Z*\s brightcyan
+    keyword wholeleft linestart Z*\t brightcyan
+
+    # model types
+    keyword whole R white
+    keyword whole C white
+    keyword whole L white
+    keyword whole SW white
+    keyword whole CSW white
+    keyword whole URC white
+    keyword whole LTRA white
+    keyword whole D white
+    keyword whole NPN white
+    keyword whole PNP white
+    keyword whole NJF white
+    keyword whole PJF white
+    keyword whole NMOS white
+    keyword whole PMOS white
+    keyword whole NMF white
+    keyword whole PMF white
+    keyword whole VDMOS white
+
+    # XSPICE models
+    keyword whole gain white
+    keyword whole summer white
+    keyword whole mult white
+    keyword whole divide white
+    keyword whole limit white
+    keyword whole climit white
+    keyword whole pwl white
+    keyword whole filesource white
+    keyword whole multi_input_pwl white
+    keyword whole aswitch white
+    keyword whole pswitch white
+    keyword whole zener white
+    keyword whole ilimit white
+    keyword whole hyst white
+    keyword whole d_dt white
+    keyword whole int white
+    keyword whole s_xfer white
+    keyword whole slew white
+    keyword whole lcouple white
+    keyword whole core white
+    keyword whole sine white
+    keyword whole triangle white
+    keyword whole square white
+    keyword whole oneshot white
+    keyword whole cmeter white
+    keyword whole lmeter white
+    keyword whole memristor white
+    keyword whole table2D white
+    keyword whole table3D white
+    keyword whole sidiode white
+    keyword whole dac_bridge white
+    keyword whole adc_bridge white
+    keyword whole d_osc white
+    keyword whole d_to_real white
+    keyword whole real_delay white
+    keyword whole real_gain white
+    keyword whole real_to_v white
+    keyword whole d_buffer white
+    keyword whole d_inverter white
+    keyword whole d_and white
+    keyword whole d_nand white
+    keyword whole d_or white
+    keyword whole d_nor white
+    keyword whole d_xor white
+    keyword whole d_xnor white
+    keyword whole d_tristate white
+    keyword whole d_pullup white
+    keyword whole d_pulldown white
+    keyword whole d_dff white
+    keyword whole d_jkff white
+    keyword whole d_tff white
+    keyword whole d_srff white
+    keyword whole d_dlatch white
+    keyword whole d_srlatch white
+    keyword whole d_state white
+    keyword whole d_fdiv white
+    keyword whole d_ram white
+    keyword whole d_source white
+    keyword whole d_lut white
+    keyword whole d_genlut white
+    keyword whole xfer white
+
+    # common model parameters
+    keyword whole m white
+
+context " " green
+
+context .control .endc
+    keyword linestart \**\n brown
+    keyword $*\n brown
+    keyword ;*\n brown
+    keyword //*\n brown
+    keyword linestart \+ red
+
+    keyword .control brightmagenta
+    keyword .endc brightmagenta
+
+    # commands
+    keyword whole ac yellow
+    keyword whole alias yellow
+    keyword whole alter yellow
+    keyword whole altermod yellow
+    keyword whole alterparam yellow
+    keyword whole asciiplot yellow
+    keyword whole aspice yellow
+    keyword whole bug yellow
+    keyword whole cd yellow
+    keyword whole cdump yellow
+    keyword whole circbyline yellow
+    keyword whole codemodel yellow
+    keyword whole compose yellow
+    keyword whole cutout yellow
+    keyword whole dc yellow
+    keyword whole define yellow
+    keyword whole deftype yellow
+    keyword whole delete yellow
+    keyword whole destroy yellow
+    keyword whole devhelp yellow
+    keyword whole diff yellow
+    keyword whole display yellow
+    keyword whole echo yellow
+    keyword whole edit yellow
+    keyword whole edisplay yellow
+    keyword whole eprint yellow
+    keyword whole eprvcd yellow
+    keyword whole fft yellow
+    keyword whole fourier yellow
+    keyword whole getcwd yellow
+    keyword whole gnuplot yellow
+    keyword whole hardcopy yellow
+    keyword whole help yellow
+    keyword whole history yellow
+    keyword whole inventory yellow
+    keyword whole iplot yellow
+    keyword whole jobs yellow
+    keyword whole let yellow
+    keyword whole linearize yellow
+    keyword whole listing yellow
+    keyword whole load yellow
+    keyword whole mc_source yellow
+    keyword whole meas yellow
+    keyword whole mdump yellow
+    keyword whole mrdump yellow
+    keyword whole noise yellow
+    keyword whole op yellow
+    keyword whole option yellow
+    keyword whole plot yellow
+    # FIXME: other pre_* keywords?
+    keyword whole pre_codemodel yellow
+    keyword whole pre_set yellow
+    keyword whole pre_unset yellow
+    keyword whole print yellow
+    keyword whole psd yellow
+    keyword whole quit yellow
+    keyword whole rehash yellow
+    keyword whole remcirc yellow
+    keyword whole remzerovec yellow
+    keyword whole reset yellow
+    keyword whole reshape yellow
+    keyword whole resume yellow
+    keyword whole rspice yellow
+    keyword whole run yellow
+    keyword whole rusage yellow
+    keyword whole save yellow
+    keyword whole sens yellow
+    keyword whole set yellow
+    keyword whole setcs yellow
+    keyword whole setcirc yellow
+    keyword whole setplot yellow
+    keyword whole setscale yellow
+    keyword whole setseed yellow
+    keyword whole settype yellow
+    keyword whole shell yellow
+    keyword whole shift yellow
+    keyword whole show yellow
+    keyword whole showmod yellow
+    keyword whole snload yellow
+    keyword whole snsave yellow
+    keyword whole source yellow
+    keyword whole spec yellow
+    keyword whole status yellow
+    keyword whole step yellow
+    keyword whole stop yellow
+    keyword whole strcmp yellow
+    keyword whole sysinfo yellow
+    keyword whole tf yellow
+    keyword whole trace yellow
+    keyword whole tran yellow
+    keyword whole transpose yellow
+    keyword whole unalias yellow
+    keyword whole undefine yellow
+    keyword whole unlet yellow
+    keyword whole unset yellow
+    keyword whole version yellow
+    keyword whole where yellow
+    keyword whole wrdata yellow
+    keyword whole write yellow
+    keyword whole wrs2p yellow
+
+    # control structures
+    keyword whole break brightred
+    keyword whole continue brightred
+    keyword whole dowhile brightred
+    keyword whole else brightred
+    keyword whole end brightred
+    keyword whole foreach brightred
+    keyword whole goto brightred
+    keyword whole if brightred
+    keyword whole label brightred
+    keyword whole repeat brightred
+    keyword whole then brightred
+    keyword whole while brightred
+
+    # internally predefined variables
+    keyword whole appendwrite white
+    keyword whole askquit white
+    keyword whole batchmode white
+    # FIXME: N between 0 and 22
+    keyword wholeleft color*\s white
+    keyword wholeleft color*\t white
+    keyword whole controlswait white
+    keyword whole cpdebug white
+    keyword whole curplot white
+    keyword whole curplotdate white
+    keyword whole curplotname white
+    keyword whole curplottitle white
+    keyword whole debug white
+    keyword whole device white
+    keyword whole diff_abstol white
+    keyword whole diff_reltol white
+    keyword whole diff_vntol white
+    keyword whole echo white
+    keyword whole editor white
+    keyword whole filetype white
+    keyword whole fourgridsize white
+    keyword whole gridsize white
+    keyword whole gridstyle white
+    keyword whole hcopydev white
+    keyword whole hcopyfont white
+    keyword whole hcopyfontsize white
+    keyword whole hcopydevtype white
+    keyword whole hcopyscale white
+    keyword whole hcopywidth white
+    keyword whole hcopyheight white
+    keyword whole hcopypscolor white
+    keyword whole hcopypstxcolor white
+    keyword whole height white
+    keyword whole history white
+    keyword whole inputdir white
+    keyword whole interactive white
+    keyword whole lprplot5 white
+    keyword whole lprps white
+    keyword whole modelcard white
+    keyword whole moremode white
+    keyword whole nfreqs white
+    keyword whole ngbehavior white
+    keyword whole ngdebug white
+    keyword whole ng_nomodcheck white
+    keyword whole no_auto_gnd white
+    keyword whole nobjthack white
+    keyword whole nobreak white
+    keyword whole noasciiplotvalue white
+    keyword whole noclobber white
+    keyword whole noglob white
+    keyword whole nolegend white
+    keyword whole nonomatch white
+    keyword whole noparse white
+    keyword whole noprintscale white
+    keyword whole nosavecurrents white
+    keyword whole nosort white
+    keyword whole nostepsizelimit white
+    keyword whole nosubckt white
+    keyword whole notrnoise white
+    keyword whole nounits white
+    keyword whole numdgt white
+    keyword whole num_threads white
+    keyword whole oscompiled white
+    keyword whole plainlet white
+    keyword whole plainplot white
+    keyword whole plainwrite white
+    keyword whole plainstyle white
+    keyword whole pointchars white
+    keyword whole polydegree white
+    keyword whole polysteps white
+    keyword whole program white
+    keyword whole prompt white
+    keyword whole rawfile white
+    keyword whole remote_shell white
+    keyword whole renumber white
+    keyword whole rndseed white
+    keyword whole rhost white
+    keyword whole rprogram white
+    keyword whole sharedmode white
+    keyword whole sim_status white
+    keyword whole sourcepath white
+    keyword whole specwindow white
+    keyword whole specwindoworder white
+    keyword whole spicepath white
+    keyword whole sqrnoise white
+    keyword whole strict_errorhandling white
+    keyword whole subend white
+    keyword whole subinvoke white
+    keyword whole substart white
+    keyword whole term white
+    keyword whole ticchar white
+    keyword whole ticmarks white
+    keyword whole ticlist white
+    keyword whole units white
+    keyword whole unixcom white
+    keyword whole wfont white
+    keyword whole wfont_size white
+    keyword whole width white
+    keyword whole win_console white
+    keyword whole wr_singlescale white
+    keyword whole wr_vecnames white
+    keyword whole x11lineararcs white
+    keyword whole xbrushwidth white
+    keyword whole xgridwidth white
+    keyword whole xfont white
+    keyword whole xtrtol white