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3cedc2dc
AD		 1#! /usr/bin/perl -w
2
9ca7f077 3# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
f16b0819 4#
3cedc2dc 5# This file is part of Bison, the GNU Compiler Compiler.
f16b0819
PE		 6#
7# This program is free software: you can redistribute it and/or modify
3cedc2dc 8# it under the terms of the GNU General Public License as published by
f16b0819
PE		 9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
3cedc2dc
AD		 13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
f16b0819 16#
3cedc2dc 17# You should have received a copy of the GNU General Public License
f16b0819
PE		 18# along with this program. If not, see <http://www.gnu.org/licenses/>.
19
15129f25
AD		 20=head1 NAME
21
22bench.pl - perform benches on Bison parsers.
23
24=head1 SYNOPSIS
25
26 ./bench.pl
27
7e5f9c54
AD		 28=head1 OPTIONS
29
e1b74b92
AD		 30=over 4
31
a6df593d
AD		 32=item B<-b>, B<--bench>=I<bench-name>
33
34Specify the set of benches to run. I<bench-name> should be one of:
35
36=over 4
37
38=item I<fusion>
39
40Test F<lalr1.cc> with three stacks against F<lalr1-fusion.cc> which
41uses a single one.
42
43=item I<push>
44
45Test the push parser vs. the pull interface. Use the C parser.
46
47=item I<variant>
48
49Test the use of variants instead of union in the C++ parser.
50
51=back
52
7e5f9c54
AD		 53=item B<-c>, B<--cflags>=I<flags>
54
55Flags to pass to the C or C++ compiler.
56
57=item B<-i>, B<--iterations>=I<integer>
58
d11ee647
AD		 59Say how many times a single test of the bench must be run. If
60negative, specify the minimum number of CPU seconds to run. Defaults
61to -3.
7e5f9c54
AD		 62
63=item B<-v>, B<--verbose>
64
65Raise the verbosity level. Currently only affects B<--help>.
66
e1b74b92
AD		 67=back
68
15129f25
AD		 69=cut
70
3cedc2dc 71use IO::File;
3cedc2dc 72
e1b74b92
AD		 73##################################################################
74
75=head1 VARIABLES
76
77=over 4
78
79=item C<$bison>
80
81The Bison program to use to compile the grammar.
82
83=item C<$cc>
84
85The C compiler.
86
87=item C<$cxx>
88
89The C++ compiler.
90
91=item C<$cflags>
92
93Compiler flags (C or C++).
94
95=item C<$iterations>
96
97The number of times the parser is run for a bench.
98
99=item C<$verbose>
100
101Verbosity level.
102
103=back
104
105=cut
106
2e7944cb 107my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
3cedc2dc 108my $cc = $ENV{'CC'} || 'gcc';
7109a18d 109my $cxx = $ENV{'CXX'} || 'g++';
7e5f9c54 110my $cflags = '';
d11ee647 111my $iterations = -3;
e1b74b92 112my $verbose = 0;
3cedc2dc 113
e1b74b92 114=head1 FUNCTIONS
3cedc2dc 115
e1b74b92 116=over 4
7e5f9c54 117
e1b74b92 118=item C<verbose($level, $message)>
15129f25 119
e1b74b92
AD		 120Report the C<$message> is C<$level> E<lt>= C<$verbose>.
121
122=cut
123
124sub verbose($$)
125{
126 my ($level, $message) = @_;
127 print STDERR $message
128 if $level <= $verbose;
129}
15129f25 130
922730fe
AD		 131=item C<directives($bench, @directive)>
132
133Format the list of directives for Bison for bench named C<$bench>.
134
7109a18d
AD		 135The special fake C<%variant> directive requests the use of
136Boost.Variants instead of a regular union. So don't pass it, it is
137not a valid directive.
138
922730fe
AD		 139=cut
140
141sub directives($@)
142{
5b421a4e 143 my ($bench, @directive) = @_;
922730fe 144 my $res = "/* Directives for bench `$bench'. */\n";
5b421a4e 145 for my $d (@directive)
7109a18d
AD		 146 {
147 $res .= $d . "\n"
148 unless $d eq '%variant';
149 }
922730fe
AD		 150 $res .= "/* End of directives for bench `$bench'. */\n";
151 return $res;
152}
153
5b421a4e 154=item C<triangular_grammar ($base, $max, @directive)>
15129f25
AD		 155
156Create a large triangular grammar which looks like :
157
158 input:
159 exp { if ($1 != 0) abort (); $$ = $1; }
160 | input exp { if ($2 != $1 + 1) abort (); $$ = $2; }
161 ;
162
163 exp:
164 END { $$ = 0; }
165 | "1" END { $$ = 1; }
166 | "1" "2" END { $$ = 2; }
167 | "1" "2" "3" END { $$ = 3; }
168 | "1" "2" "3" "4" END { $$ = 4; }
169 | "1" "2" "3" "4" "5" END { $$ = 5; }
170 ;
171
7e5f9c54 172C<$base> is the base name for the file to create (F<$base.y>).
15129f25 173C<$max> is the number of such rules (here, 5). You may pass
5b421a4e 174additional Bison C<@directive>.
15129f25
AD		 175
176The created parser is self contained: it includes its scanner, and
177source of input.
178=cut
179
3cedc2dc
AD		 180sub triangular_grammar ($$$)
181{
5b421a4e
AD		 182 my ($base, $max, @directive) = @_;
183 my $directives = directives ($base, @directive);
3cedc2dc
AD		 184
185 my $out = new IO::File ">$base.y"
186 or die;
187 print $out <<EOF;
188%error-verbose
189%debug
190%{
191#include <stdio.h>
192#include <stdlib.h>
193
194static int yylex (void);
195static void yyerror (const char *msg);
196%}
922730fe 197$directives
3cedc2dc
AD		 198%union
199{
200 int val;
201};
202
203%token END "end"
204%type <val> exp input
205EOF
206
207 for my $size (1 .. $max)
208 {
209 print $out "%token t$size $size \"$size\"\n";
210 };
211
212print $out <<EOF;
213%%
214input:
215 exp { if (\$1 != 0) abort (); \$\$ = \$1; }
216| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
217;
218
219exp:
220 END
221 { \$\$ = 0; }
222EOF
223
224for my $size (1 .. $max)
225 {
226 use Text::Wrap;
227 print $out wrap ("| ", " ",
228 (map { "\"$_\"" } (1 .. $size)),
229 " END \n"),
230 " { \$\$ = $size; }\n";
231 };
232print $out ";\n";
233
234print $out <<EOF;
235%%
236static int
237yylex (void)
238{
239 static int inner = 1;
240 static int outer = 0;
241 if (outer > $max)
242 return 0;
243 else if (inner > outer)
244 {
245 inner = 1;
246 ++outer;
247 return END;
248 }
249 return inner++;
250}
251
252static void
253yyerror (const char *msg)
254{
255 fprintf (stderr, "%s\\n", msg);
256}
257
258int
259main (void)
260{
261 yydebug = !!getenv ("YYDEBUG");
262 return yyparse ();
263}
264EOF
265}
266
267##################################################################
268
15129f25
AD		 269=item C<calc_input ($base, $max)>
270
7e5f9c54 271Generate the input file F<$base.input> for the calc parser. The input
15129f25
AD		 272is composed of two expressions. The first one is using left recursion
273only and consumes no stack. The second one requires a deep stack.
274These two expressions are repeated C<$max> times in the output file.
275
276=cut
277
3cedc2dc
AD		 278sub calc_input ($$)
279{
280 my ($base, $max) = @_;
281 my $out = new IO::File ">$base.input"
282 or die;
283 foreach (1 .. $max)
284 {
285 print $out "0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+55+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+85+86+87+88+89+90+91+92+93+94+95+96+97+98+99\n";
286 print $out "1+1*(2+2*(3+3*(4+4*(5+5*(6+6*(7+7*(8+8*(9+9*(10+10*(11+11*(12+12*(13+13*(14+14*(15+15*(16+16*(17+17*(18+18*(19+19*(20+20*(21+21*(22+22*(23+23*(24+24*(25+25*(26+26*(27+27*(28+28*(29+29*(30+30*(31+31*(32+32*(33+33*(34+34*(35+35*(36+36*(37+37*(38+38*(39+39*(40+40*(41+41*(42+42*(43+43*(44+44*(45+45*(46+46*(47+47*(48+48*(49+49*(50+50*(51+51*(52+52*(53+53*(54+54*(55+55*(56+56*(57+57*(58+58*(59+59*(60+60*(61+61*(62+62*(63+63*(64+64*(65+65*(66+66*(67+67*(68+68*(69+69*(70+70*(71+71*(72+72*(73+73*(74+74*(75+75*(76+76*(77+77*(78+78*(79+79*(80+80*(81+81*(82+82*(83+83*(84+84*(85+85*(86+86*(87+87*(88+88*(89+89*(90+90*(91+91*(92+92*(93+93*(94+94*(95+95*(96+96*(97+97*(98+98*(99+99*(100+100*(101+101*(102+102*(103+103*(104+104*(105+105*(106+106*(107+107*(108+108*(109+109*(110+110*(111+111*(112+112*(113+113*(114+114*(115+115*(116+116*(117+117*(118+118*(119+119*(120+120*(121+121*(122+122*(123+123*(124+124*(125+125*(126+126*(127+127*(128+128*(129+129*(130+130*(131+131*(132+132*(133+133*(134+134*(135+135*(136+136*(137+137*(138+138*(139+139*(140+140*(141+141*(142+142*(143+143*(144+144*(145+145*(146+146*(147+147*(148+148*(149+149*(150+150*(151+151*(152+152*(153+153*(154+154*(155+155*(156+156*(157+157*(158+158*(159+159*(160+160*(161+161*(162+162*(163+163*(164+164*(165+165*(166+166*(167+167*(168+168*(169+169*(170+170*(171+171*(172+172*(173+173*(174+174*(175+175*(176+176*(177+177*(178+178*(179+179*(180+180*(181+181*(182+182*(183+183*(184+184*(185+185*(186+186*(187+187*(188+188*(189+189*(190+190*(191+191*(192+192*(193+193*(194+194*(195+195*(196+196*(197+197*(198+198*(199+199*(200+200*(201+201*(202+202*(203+203*(204+204*(205+205*(206+206*(207+207*(208+208*(209+209*(210+210*(211+211*(212+212*(213+213*(214+214*(215+215*(216+216*(217+217*(218+218*(219+219*(220+220*(221+221*(222+222*(223+223*(224+224*(225+225*(226+226*(227+227*(228+228*(229+229*(230+230*(231+231*(232+232*(233+233*(234+234*(235+235*(236+236*(237+237*(238+238*(239+239*(240+240*(241+241*(242+242*(243+243*(244+244*(245+245*(246+246*(247+247*(248+248*(249+249*(250+250*(251+251*(252+252*(253+253*(254+254*(255+255*(256+256*(257+257*(258+258*(259+259*(260+260*(261+261*(262+262*(263+263*(264+264*(265+265*(266+266*(267+267*(268+268*(269+269*(270+270*(271+271*(272+272*(273+273*(274+274*(275+275*(276+276*(277+277*(278+278*(279+279*(280+280*(281+281*(282+282*(283+283*(284+284*(285+285*(286+286*(287+287*(288+288*(289+289*(290+290*(291+291*(292+292*(293+293*(294+294*(295+295*(296+296*(297+297*(298+298*(299+299*(300+300*(301+301*(302+302*(303+303*(304+304*(305+305*(306+306*(307+307*(308+308*(309+309*(310+310*(311+311*(312+312*(313+313*(314+314*(315+315*(316+316*(317+317*(318+318*(319+319*(320+320*(321+321*(322+322*(323+323*(324+324*(325+325*(326+326*(327+327*(328+328*(329+329*(330+330*(331+331*(332+332*(333+333*(334+334*(335+335*(336+336*(337+337*(338+338*(339+339*(340+340*(341+341*(342+342*(343+343*(344+344*(345+345*(346+346*(347+347*(348+348*(349+349*(350+350*(351+351*(352+352*(353+353*(354+354*(355+355*(356+356*(357+357*(358+358*(359+359*(360+360*(361+361*(362+362*(363+363*(364+364*(365+365*(366+366*(367+367*(368+368*(369+369*(370+370*(371+371*(372+372*(373+373*(374+374*(375+375*(376+376*(377+377*(378+378*(379+379*(380+380*(381+381*(382+382*(383+383*(384+384*(385+385*(386+386*(387+387*(388+388*(389+389*(390+390*(391+391*(392+392*(393+393*(394+394*(395+395*(396+396*(397+397*(398+398*(399+399*(400+400*(401+401*(402+402*(403+403*(404+404*(405+405*(406+406*(407+407*(408+408*(409+409*(410+410*(411+411*(412+412*(413+413*(414+414*(415+415*(416+416*(417+417*(418+418*(419+419*(420+420*(421+421*(422+422*(423+423*(424+424*(425+425*(426+426*(427+427*(428+428*(429+429*(430+430*(431+431*(432+432*(433+433*(434+434*(435+435*(436+436*(437+437*(438+438*(439+439*(440+440*(441+441*(442+442*(443+443*(444+444*(445+445*(446+446*(447+447*(448+448*(449+449*(450+450*(451+451*(452+452*(453+453*(454+454*(455+455*(456+456*(457+457*(458+458*(459+459*(460+460*(461+461*(462+462*(463+463*(464+464*(465+465*(466+466*(467+467*(468+468*(469+469*(470+470*(471+471*(472+472*(473+473*(474+474*(475+475*(476+476*(477+477*(478+478*(479+479*(480+480*(481+481*(482+482*(483+483*(484+484*(485+485*(486+486*(487+487*(488+488*(489+489*(490+490*(491+491*(492+492*(493+493*(494+494*(495+495*(496+496*(497+497*(498+498*(499+499*(500+500*(501+501*(502+502*(503+503*(504+504*(505+505*(506+506*(507+507*(508+508*(509+509*(510+510*(511+511*(512+512*(513+513*(514+514*(515+515*(516+516*(517+517*(518+518*(519+519*(520+520*(521+521*(522+522*(523+523*(524+524*(525+525*(526+526*(527+527*(528+528*(529+529*(530+530*(531+531*(532+532*(533+533*(534+534*(535+535*(536+536*(537+537*(538+538*(539+539*(540+540*(541+541*(542+542*(543+543*(544+544*(545+545*(546+546*(547+547*(548+548*(549+549*(550+550*(551+551*(552+552*(553+553*(554+554*(555+555*(556+556*(557+557*(558+558*(559+559*(560+560*(561+561*(562+562*(563+563*(564+564*(565+565*(566+566*(567+567*(568+568*(569+569*(570+570*(571+571*(572+572*(573+573*(574+574*(575+575*(576+576*(577+577*(578+578*(579+579*(580+580*(581+581*(582+582*(583+583*(584+584*(585+585*(586+586*(587+587*(588+588*(589+589*(590+590*(591+591*(592+592*(593+593*(594+594*(595+595*(596+596*(597+597*(598+598*(599+599*(600+600*(601+601*(602+602*(603+603*(604+604*(605+605*(606+606*(607+607*(608+608*(609+609*(610+610*(611+611*(612+612*(613+613*(614+614*(615+615*(616+616*(617+617*(618+618*(619+619*(620+620*(621+621*(622+622*(623+623*(624+624*(625+625*(626+626*(627+627*(628+628*(629+629*(630+630*(631+631*(632+632*(633+633*(634+634*(635+635*(636+636*(637+637*(638+638*(639+639*(640+640*(641+641*(642+642*(643+643*(644+644*(645+645*(646+646*(647+647*(648+648*(649+649*(650+650*(651+651*(652+652*(653+653*(654+654*(655+655*(656+656*(657+657*(658+658*(659+659*(660+660*(661+661*(662+662*(663+663*(664+664*(665+665*(666+666*(667+667*(668+668*(669+669*(670+670*(671+671*(672+672*(673+673*(674+674*(675+675*(676+676*(677+677*(678+678*(679+679*(680+680*(681+681*(682+682*(683+683*(684+684*(685+685*(686+686*(687+687*(688+688*(689+689*(690+690*(691+691*(692+692*(693+693*(694+694*(695+695*(696+696*(697+697*(698+698*(699+699*(700+700*(701+701*(702+702*(703+703*(704+704*(705+705*(706+706*(707+707*(708+708*(709+709*(710+710*(711+711*(712+712*(713+713*(714+714*(715+715*(716+716*(717+717*(718+718*(719+719*(720+720*(721+721*(722+722*(723+723*(724+724*(725+725*(726+726*(727+727*(728+728*(729+729*(730+730*(731+731*(732+732*(733+733*(734+734*(735+735*(736+736*(737+737*(738+738*(739+739*(740+740*(741+741*(742+742*(743+743*(744+744*(745+745*(746+746*(747+747*(748+748*(749+749*(750+750*(751+751*(752+752*(753+753*(754+754*(755+755*(756+756*(757+757*(758+758*(759+759*(760+760*(761+761*(762+762*(763+763*(764+764*(765+765*(766+766*(767+767*(768+768*(769+769*(770+770*(771+771*(772+772*(773+773*(774+774*(775+775*(776+776*(777+777*(778+778*(779+779*(780+780*(781+781*(782+782*(783+783*(784+784*(785+785*(786+786*(787+787*(788+788*(789+789*(790+790*(791+791*(792+792*(793+793*(794+794*(795+795*(796+796*(797+797*(798+798*(799+799*(800+800*(801+801*(802+802*(803+803*(804+804*(805+805*(806+806*(807+807*(808+808*(809+809*(810+810*(811+811*(812+812*(813+813*(814+814*(815+815*(816+816*(817+817*(818+818*(819+819*(820+820*(821+821*(822+822*(823+823*(824+824*(825+825*(826+826*(827+827*(828+828*(829+829*(830+830*(831+831*(832+832*(833+833*(834+834*(835+835*(836+836*(837+837*(838+838*(839+839*(840+840*(841+841*(842+842*(843+843*(844+844*(845+845*(846+846*(847+847*(848+848*(849+849*(850+850*(851+851*(852+852*(853+853*(854+854*(855+855*(856+856*(857+857*(858+858*(859+859*(860+860*(861+861*(862+862*(863+863*(864+864*(865+865*(866+866*(867+867*(868+868*(869+869*(870+870*(871+871*(872+872*(873+873*(874+874*(875+875*(876+876*(877+877*(878+878*(879+879*(880+880*(881+881*(882+882*(883+883*(884+884*(885+885*(886+886*(887+887*(888+888*(889+889*(890+890*(891+891*(892+892*(893+893*(894+894*(895+895*(896+896*(897+897*(898+898*(899+899*(900+900*(901+901*(902+902*(903+903*(904+904*(905+905*(906+906*(907+907*(908+908*(909+909*(910+910*(911+911*(912+912*(913+913*(914+914*(915+915*(916+916*(917+917*(918+918*(919+919*(920+920*(921+921*(922+922*(923+923*(924+924*(925+925*(926+926*(927+927*(928+928*(929+929*(930+930*(931+931*(932+932*(933+933*(934+934*(935+935*(936+936*(937+937*(938+938*(939+939*(940+940*(941+941*(942+942*(943+943*(944+944*(945+945*(946+946*(947+947*(948+948*(949+949*(950+950*(951+951*(952+952*(953+953*(954+954*(955+955*(956+956*(957+957*(958+958*(959+959*(960+960*(961+961*(962+962*(963+963*(964+964*(965+965*(966+966*(967+967*(968+968*(969+969*(970+970*(971+971*(972+972*(973+973*(974+974*(975+975*(976+976*(977+977*(978+978*(979+979*(980+980*(981+981*(982+982*(983+983*(984+984*(985+985*(986+986*(987+987*(988+988*(989+989*(990+990*(991+991*(992+992*(993+993*(994+994*(995+995*(996+996*(997+997*(998+998*(999+999*(1000+1000*(1001))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))\n";
287 }
288}
289
290##################################################################
5b421a4e 291=item C<calc_grammar ($base, $max, @directive)>
15129f25 292
7e5f9c54 293Generate a Bison file F<$base.y> for a calculator parser in C. Pass
5b421a4e 294the additional Bison C<@directive>. C<$max> is ignored, but left to
7109a18d 295have the same interface as C<triangular_grammar>.
15129f25
AD		 296
297=cut
3cedc2dc
AD		 298
299sub calc_grammar ($$$)
300{
5b421a4e
AD		 301 my ($base, $max, @directive) = @_;
302 my $directives = directives ($base, @directive);
3cedc2dc
AD		 303
304 my $out = new IO::File ">$base.y"
305 or die;
306 print $out <<EOF;
307%{
308#include <stdio.h>
309
310#include <stdlib.h>
311#include <string.h>
312#include <ctype.h>
313#define USE(Var)
314
315/* Exercise pre-prologue dependency to %union. */
316typedef int semantic_value;
317
318static semantic_value global_result = 0;
319static int global_count = 0;
320%}
321
3cedc2dc
AD		 322$directives
323%error-verbose
922730fe 324/* Exercise %union. */
3cedc2dc
AD		 325%union
326{
327 semantic_value ival;
328};
329
330%{
331static int power (int base, int exponent);
332/* yyerror receives the location if:
333 - %location & %pure & %glr
334 - %location & %pure & %yacc & %parse-param. */
335static void yyerror (const char *s);
336#if YYPURE
337static int yylex (YYSTYPE* yylvalp);
338#else
339static int yylex (void);
340#endif
341%}
342
343/* Bison Declarations */
344%token CALC_EOF 0 "end of input"
345%token <ival> NUM "number"
346%type <ival> exp
347
348%nonassoc '=' /* comparison */
349%left '-' '+'
350%left '*' '/'
351%left NEG /* negation--unary minus */
352%right '^' /* exponentiation */
353
354/* Grammar follows */
355%%
356input:
357 line
358| input line
359;
360
361line:
362 '\\n'
363| exp '\\n' { USE (\$1); }
364;
365
366exp:
367 NUM { \$\$ = \$1; }
368| exp '=' exp
369 {
370 if (\$1 != \$3)
371 fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
372 \$\$ = \$1;
373 }
374| exp '+' exp { \$\$ = \$1 + \$3; }
375| exp '-' exp { \$\$ = \$1 - \$3; }
376| exp '*' exp { \$\$ = \$1 * \$3; }
377| exp '/' exp { \$\$ = \$1 / \$3; }
378| '-' exp %prec NEG { \$\$ = -\$2; }
379| exp '^' exp { \$\$ = power (\$1, \$3); }
380| '(' exp ')' { \$\$ = \$2; }
381| '(' error ')' { \$\$ = 1111; }
382| '!' { \$\$ = 0; YYERROR; }
383| '-' error { \$\$ = 0; YYERROR; }
384;
385%%
386/* The input. */
387static FILE *input;
388
389static void
390yyerror (const char *s)
391{
392 fprintf (stderr, "%s\\n", s);
393}
394
395static int
396get_char (void)
397{
398 return getc (input);
399}
400
401
402static void
403unget_char ( int c)
404{
405 ungetc (c, input);
406}
407
408static int
409read_signed_integer (void)
410{
411 int c = get_char ();
412 int sign = 1;
413 int n = 0;
414
415 if (c == '-')
416 {
417 c = get_char ();
418 sign = -1;
419 }
420
421 while (isdigit (c))
422 {
423 n = 10 * n + (c - '0');
424 c = get_char ();
425 }
426
427 unget_char (c);
428
429 return sign * n;
430}
431
3cedc2dc
AD		 432static int
433#if YYPURE
434# define yylval (*yylvalp)
435yylex (YYSTYPE* yylvalp)
436#else
437yylex (void)
438#endif
439{
440 int c;
441
442 /* Skip white space. */
443 while ((c = get_char ()) == ' ' || c == '\t')
0925d5bf 444 continue;
3cedc2dc
AD		 445
446 /* process numbers */
447 if (c == '.' || isdigit (c))
448 {
449 unget_char ( c);
450 yylval.ival = read_signed_integer ();
451 return NUM;
452 }
453
454 /* Return end-of-file. */
455 if (c == EOF)
456 return CALC_EOF;
457
458 /* Return single chars. */
459 return c;
460}
461
462static int
463power (int base, int exponent)
464{
465 int res = 1;
466 if (exponent < 0)
467 exit (3);
468 for (/* Niente */; exponent; --exponent)
469 res *= base;
470 return res;
471}
472
473
3cedc2dc
AD		 474int
475main (int argc, const char **argv)
476{
477 semantic_value result = 0;
478 int count = 0;
479 int status;
480
481 input = fopen ("calc.input", "r");
482 if (!input)
483 {
484 perror ("calc.input");
485 return 3;
486 }
487
488 status = yyparse ();
489 if (global_result != result)
490 abort ();
491 if (global_count != count)
492 abort ();
493
494 return status;
495}
496EOF
497}
498
499##################################################################
500
5b421a4e 501=item C<variant_grammar ($base, $max, @directive)>
7109a18d 502
7e5f9c54 503Generate a Bison file F<$base.y> that uses, or not, the Boost.Variants
5b421a4e 504depending on the C<@directive>.
7109a18d
AD		 505
506=cut
507
508sub variant_grammar ($$$)
509{
5b421a4e
AD		 510 my ($base, $max, @directive) = @_;
511 my $directives = directives ($base, @directive);
512 my $variant = grep { $_ eq '%variant' } @directive;
7109a18d
AD		 513
514 my $out = new IO::File ">$base.y"
515 or die;
516 print $out <<EOF;
7109a18d
AD		 517%language "C++"
518%defines
5b421a4e 519$directives
7109a18d 520
5b421a4e 521%code requires // variant.h
7109a18d
AD		 522{
523#include <string>
524}
525
5b421a4e 526%code // variant.c
7109a18d
AD		 527{
528#include <algorithm>
529#include <iostream>
530#include <sstream>
531
532// Prototype of the yylex function providing subsequent tokens.
533static yy::parser::token_type yylex(yy::parser::semantic_type* yylval);
534
7e5f9c54 535#define STAGE_MAX ($max * 10)
7109a18d
AD		 536#define USE_VARIANTS $variant
537#if USE_VARIANTS
538# define IF_VARIANTS(True, False) True
539#else
540# define IF_VARIANTS(True, False) False
541#endif
542}
543EOF
544
545 if ($variant)
546 {
547 print $out <<'EOF';
548%code variant {int,std::string}
549%token <std::string> TEXT
550%token <int> NUMBER
551%printer { std::cerr << "Number: " << $$; } <int>
552%printer { std::cerr << "Text: " << $$; } <std::string>
553%token END_OF_FILE 0
554%type <std::string> text result
555
556%%
557result:
558 text { /* Throw away the result. */ }
559;
560
561text:
562 /* nothing */ { /* This will generate an empty string */ }
563| text TEXT { std::swap($$,$1); $$.append($2); }
564| text NUMBER {
565 std::swap($$,$1);
566 std::ostringstream ss;
567 ss << ' ' << $2;
568 $$.append(ss.str());
569 }
570;
571EOF
572 }
573 else
574 {
575 # Not using Boost variants.
576 print $out <<'EOF';
577%union {int ival; std::string* sval;}
578%token <sval> TEXT
579%token <ival> NUMBER
580%printer { std::cerr << "Number: " << $$; } <ival>
581%printer { std::cerr << "Text: " << *$$; } <sval>
582%token END_OF_FILE 0
583%type <sval> text result
584
585%%
586result:
587 text { delete $1; }
588;
589
590text:
591 /* nothing */ { $$ = new std::string; }
592| text TEXT { $$->append(*$2); delete $2; }
593| text NUMBER {
594 std::ostringstream ss;
595 ss << ' ' << $2;
596 $$->append(ss.str());
597 }
598;
599EOF
600 }
601
602 print $out <<'EOF';
603%%
604static
605yy::parser::token_type
606yylex(yy::parser::semantic_type* yylval)
607{
608 static int stage = -1;
609 ++stage;
610 if (stage == STAGE_MAX)
611 return yy::parser::token::END_OF_FILE;
612 else if (stage % 2)
613 {
a6df593d 614 IF_VARIANTS(yylval->build<int>(), yylval->ival) = stage;
7109a18d
AD		 615 return yy::parser::token::NUMBER;
616 }
617 else
618 {
a6df593d 619 IF_VARIANTS(yylval->build<std::string>() =, yylval->sval = new) std::string("A string.");
7109a18d
AD		 620 return yy::parser::token::TEXT;
621 }
622 abort();
623}
624
625// Mandatory error function
626void
627yy::parser::error(const yy::parser::location_type& yylloc,
628 const std::string& message)
629{
630 std::cerr << yylloc << ": " << message << std::endl;
631}
632
633int main(int argc, char *argv[])
634{
635 yy::parser p;
5b421a4e 636#if YYDEBUG
7109a18d 637 p.set_debug_level(!!getenv("YYDEBUG"));
5b421a4e 638#endif
7109a18d
AD		 639 p.parse();
640 return 0;
641}
642EOF
643}
644
645##################################################################
646
15129f25
AD		 647=item C<compile ($base)>
648
7109a18d
AD		 649Compile C<$base.y> to an executable C, Using the C or C++ compiler
650depending on the %language specification in C<$base.y>.
15129f25
AD		 651
652=cut
653
3cedc2dc
AD		 654sub compile ($)
655{
656 my ($base) = @_;
7109a18d
AD		 657 my $language = `sed -ne '/%language "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
658 chomp $language;
659
660 my $compiler = $language eq 'C++' ? $cxx : $cc;
661
3cedc2dc
AD		 662 system ("$bison $base.y -o $base.c") == 0
663 or die;
7e5f9c54 664 system ("$compiler -o $base $cflags $base.c") == 0
3cedc2dc
AD		 665 or die;
666}
667
7484f1d4 668=item C<bench_grammar ($gram, %bench)>
15129f25
AD		 669
670Generate benches for C<$gram>. C<$gram> should be C<calc> or
7484f1d4
AD		 671C<triangle>. C<%bench> is a hash of the form:
672
5b421a4e 673 $name => @directive
7484f1d4 674
5b421a4e 675where C<$name> is the name of the bench, and C<@directive> are the
7484f1d4
AD		 676Bison directive to use for this bench. All the benches are compared
677against each other, repeated 50 times.
15129f25
AD		 678
679=cut
680
7484f1d4 681sub bench_grammar ($%)
3cedc2dc 682{
7484f1d4 683 my ($gram, %test) = @_;
f16b0819 684
d11ee647
AD		 685 use Benchmark qw (:all :hireswallclock);
686
7484f1d4 687 # Set up the benches as expected by timethese.
3cedc2dc 688 my %bench;
d11ee647
AD		 689 # For each bench, capture the size.
690 my %size;
3cedc2dc
AD		 691 while (my ($name, $directives) = each %test)
692 {
e1b74b92 693 verbose 1, "Generating $name\n";
7484f1d4 694 # Call the Bison input file generator.
3cedc2dc 695 my $generator = "$gram" . "_grammar";
922730fe 696 &$generator ($name, 200, @$directives);
5b421a4e 697 # Compile the executable.
3cedc2dc
AD		 698 compile ($name);
699 $bench{$name} = "system ('./$name');";
d11ee647 700 chop($size{$name} = `wc -c <$name`);
3cedc2dc
AD		 701 }
702
7484f1d4 703 # Run the benches.
d11ee647
AD		 704 #
705 # STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
706 # shows each of the 5 times available ('wallclock' time, user time,
707 # system time, user time of children, and system time of
708 # children). 'noc' shows all except the two children times. 'nop'
709 # shows only wallclock and the two children times. 'auto' (the
710 # default) will act as 'all' unless the children times are both
711 # zero, in which case it acts as 'noc'. 'none' prevents output.
712 verbose 1, "Running the benches for $gram\n";
7e5f9c54 713 my $res = timethese ($iterations, \%bench, 'nop');
d11ee647
AD		 714
715 # Output the speed result.
3cedc2dc 716 cmpthese ($res, 'nop');
d11ee647
AD		 717
718 # Display the sizes.
719 print "Sizes:\n";
0cc5bead 720 my $width = 10;
d11ee647
AD		 721 for my $bench (keys %size)
722 {
0cc5bead
AD		 723 $width = length $bench
724 if $width < length $bench;
725 }
726 for my $bench (keys %size)
727 {
728 printf "%${width}s: %5dkB\n", $bench, int ($size{$bench} / 1024);
d11ee647 729 }
3cedc2dc
AD		 730}
731
7484f1d4
AD		 732
733=item C<bench_push_parser ()>
734
735Bench the C push parser against the pull parser, pure and impure
736interfaces.
737
738=cut
739
740sub bench_push_parser ()
741{
7484f1d4
AD		 742 calc_input ('calc', 200);
743 bench_grammar
744 ('calc',
745 (
922730fe
AD		 746 "pull-impure" => [],
747 "pull-pure" => ['%define api.pure'],
748 "push-impure" => ['%define api.push_pull "both"'],
749 "push-pure" => ['%define api.push_pull "both"', '%define api.pure'],
7484f1d4
AD		 750 )
751 );
752}
753
7109a18d
AD		 754=item C<bench_variant_parser ()>
755
756Bench the C++ lalr1.cc parser using Boost.Variants or %union.
757
758=cut
759
760sub bench_variant_parser ()
761{
762 bench_grammar
763 ('variant',
764 (
a6df593d
AD		 765 "f-union" => ['%skeleton "lalr1-fusion.cc"'],
766 "f-uni-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug'],
767 "f-var" => ['%skeleton "lalr1-fusion.cc"', '%variant'],
768 "f-var-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant'],
769 "f-var-dtr" => ['%skeleton "lalr1-fusion.cc"', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
770 "f-var-deb-dtr" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
7109a18d
AD		 771 )
772 );
773}
774
429b4848
AD		 775=item C<bench_fusion_parser ()>
776
777Bench the C++ lalr1.cc parser using Boost.Variants or %union.
778
779=cut
780
781sub bench_fusion_parser ()
782{
783 bench_grammar
784 ('variant',
785 (
786 "split" => [],
787 "fused" => ['%skeleton "lalr1-fusion.cc"'],
788 )
789 );
790}
791
7109a18d
AD		 792############################################################################
793
7e5f9c54
AD		 794sub help ($)
795{
796 my ($verbose) = @_;
797 use Pod::Usage;
798 # See <URL:http://perldoc.perl.org/pod2man.html#NOTES>.
799 pod2usage( { -message => "Bench Bison parsers",
800 -exitval => 0,
801 -verbose => $verbose,
802 -output => \*STDOUT });
803}
804
805sub getopt ()
806{
807 use Getopt::Long;
a6df593d
AD		 808 %option = (
809 "b|bench=s" => \$bench,
810 "c|cflags=s" => \$cflags,
811 "h|help" => sub { help ($verbose) },
812 "i|iterations=i" => \$iterations,
813 "v|verbose" => sub { ++$verbose },
814 );
7e5f9c54
AD		 815 Getopt::Long::Configure ("bundling", "pass_through");
816 GetOptions (%option)
817 or exit 1;
818}
819
820######################################################################
821
822getopt;
e1b74b92
AD		 823verbose 1, "Using bison=$bison.\n";
824verbose 1, "Using cc=$cc.\n";
825verbose 1, "Using cxx=$cxx.\n";
826verbose 1, "Using cflags=$cflags.\n";
a6df593d
AD		 827
828bench_fusion_parser() if $bench eq "fusion";
829bench_push_parser() if $bench eq "push";
830bench_variant_parser() if $bench eq "variant";
3cedc2dc
AD		 831
832### Setup "GNU" style for perl-mode and cperl-mode.
833## Local Variables:
834## perl-indent-level: 2
835## perl-continued-statement-offset: 2
836## perl-continued-brace-offset: 0
837## perl-brace-offset: 0
838## perl-brace-imaginary-offset: 0
839## perl-label-offset: -2
840## cperl-indent-level: 2
841## cperl-brace-offset: 0
842## cperl-continued-brace-offset: 0
843## cperl-label-offset: -2
844## cperl-extra-newline-before-brace: t
845## cperl-merge-trailing-else: nil
846## cperl-continued-statement-offset: 2
847## End:
bison