tests/calc.at

   1 # Checking the output filenames.                         -*- Autotest -*-
   2 # Copyright 2000, 2001 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2, or (at your option)
   7 # any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17 # 02111-1307, USA.
  18
  19 AT_BANNER([[Simple Calculator.]])
  20
  21 ## ---------------------------------------------------- ##
  22 ## Compile the grammar described in the documentation.  ##
  23 ## ---------------------------------------------------- ##
  24
  25
  26 # ------------------------- #
  27 # Helping Autotest macros.  #
  28 # ------------------------- #
  29
  30
  31 # _AT_DATA_CALC_Y($1, $2, $3, [CPP-DIRECTIVES])
  32 # ---------------------------------------------
  33 # Produce `calc.y'.  Don't call this macro directly, because it contains
  34 # some occurrences of `$1' etc. which will be interpreted by m4.  So
  35 # you should call it with $1, $2, and $3 as arguments, which is what
  36 # AT_DATA_CALC_Y does.
  37 m4_define([_AT_DATA_CALC_Y],
  38 [m4_if([$1$2$3], $[1]$[2]$[3], [],
  39        [m4_fatal([$0: Invalid arguments: $@])])dnl
  40 AT_DATA([calc.y],
  41 [[/* Infix notation calculator--calc */
  42
  43 %{
  44 #include <config.h>
  45 /* We don't need a perfect malloc for these tests. */
  46 #undef malloc
  47 #include <stdio.h>
  48
  49 #if STDC_HEADERS
  50 # include <stdlib.h>
  51 # include <string.h>
  52 #else
  53 char *strcat(char *dest, const char *src);
  54 #endif
  55 #include <ctype.h>
  56
  57 static int power (int base, int exponent);
  58 static void yyerror (const char *s);
  59 static int yylex (void);
  60 static int yygetc (void);
  61 static void yyungetc (int c);
  62
  63 extern void perror (const char *s);
  64 %}
  65
  66 /* Bison Declarations */
  67 %token CALC_EOF 0
  68 %token NUM
  69
  70 %nonassoc '=' /* comparison            */
  71 %left '-' '+'
  72 %left '*' '/'
  73 %left NEG     /* negation--unary minus */
  74 %right '^'    /* exponentiation        */
  75
  76 ]$4[
  77
  78 /* Grammar follows */
  79 %%
  80 input:
  81   /* empty string */
  82 | input line
  83 ;
  84
  85 line:
  86   '\n'
  87 | exp '\n'
  88 ;
  89
  90 exp:
  91   NUM                { $$ = $1;             }
  92 | exp '=' exp
  93   {
  94      if ($1 != $3)
  95        printf ("calc: error: %d != %d\n", $1, $3);
  96      $$ = $1 == $3;
  97   }
  98 | exp '+' exp        { $$ = $1 + $3;        }
  99 | exp '-' exp        { $$ = $1 - $3;        }
 100 | exp '*' exp        { $$ = $1 * $3;        }
 101 | exp '/' exp        { $$ = $1 / $3;        }
 102 | '-' exp  %prec NEG { $$ = -$2;            }
 103 | exp '^' exp        { $$ = power ($1, $3); }
 104 | '(' exp ')'        { $$ = $2;             }
 105 ;
 106 %%
 107 /* The input. */
 108 FILE *yyin;
 109
 110 static void
 111 yyerror (const char *s)
 112 {
 113 #if YYLSP_NEEDED
 114   fprintf (stderr, "%d.%d:%d.%d: ",
 115            yylloc.first_line, yylloc.first_column,
 116            yylloc.last_line, yylloc.last_column);
 117 #endif
 118   fprintf (stderr, "%s\n", s);
 119 }
 120
 121 static int
 122 yygetc (void)
 123 {
 124   int res = getc (yyin);
 125 #if YYLSP_NEEDED
 126   if (res == '\n')
 127     {
 128       yylloc.last_line++;
 129       yylloc.last_column = 0;
 130     }
 131   else
 132     yylloc.last_column++;
 133 #endif
 134   return res;
 135 }
 136
 137
 138 static void
 139 yyungetc (int c)
 140 {
 141 #if YYLSP_NEEDED
 142   /* Wrong when C == `\n'. */
 143   yylloc.last_column--;
 144 #endif
 145   ungetc (c, yyin);
 146 }
 147
 148 static int
 149 read_signed_integer (void)
 150 {
 151   int c = yygetc ();
 152   int sign = 1;
 153   int n = 0;
 154
 155   if (c == '-')
 156     {
 157       c = yygetc ();
 158       sign = -1;
 159     }
 160
 161   while (isdigit (c))
 162     {
 163       n = 10 * n + (c - '0');
 164       c = yygetc ();
 165     }
 166
 167   yyungetc (c);
 168
 169   return sign * n;
 170 }
 171
 172
 173
 174 /*---------------------------------------------------------------.
 175 | Lexical analyzer returns an integer on the stack and the token |
 176 | NUM, or the ASCII character read if not a number.  Skips all   |
 177 | blanks and tabs, returns 0 for EOF.                            |
 178 `---------------------------------------------------------------*/
 179
 180 static int
 181 yylex (void)
 182 {
 183   int c;
 184
 185 #if YYLSP_NEEDED
 186   yylloc.first_column = yylloc.last_column;
 187   yylloc.first_line = yylloc.last_line;
 188 #endif
 189
 190   /* Skip white space.  */
 191   while ((c = yygetc ()) == ' ' || c == '\t')
 192     {
 193 #if YYLSP_NEEDED
 194       yylloc.first_column = yylloc.last_column;
 195       yylloc.first_line = yylloc.last_line;
 196 #endif
 197     }
 198
 199   /* process numbers   */
 200   if (c == '.' || isdigit (c))
 201     {
 202       yyungetc (c);
 203       yylval = read_signed_integer ();
 204       return NUM;
 205     }
 206
 207   /* Return end-of-file.  */
 208   if (c == EOF)
 209     return CALC_EOF;
 210
 211   /* Return single chars. */
 212   return c;
 213 }
 214
 215 static int
 216 power (int base, int exponent)
 217 {
 218   int res = 1;
 219   if (exponent < 0)
 220     exit (1);
 221   for (/* Niente */; exponent; --exponent)
 222     res *= base;
 223   return res;
 224 }
 225
 226 int
 227 main (int argc, const char **argv)
 228 {
 229   yyin = NULL;
 230
 231   if (argc == 2)
 232     yyin = fopen (argv[1], "r");
 233   else
 234     yyin = stdin;
 235
 236   if (!yyin)
 237     {
 238       perror (argv[1]);
 239       exit (1);
 240     }
 241
 242 #if YYDEBUG
 243   yydebug = 1;
 244 #endif
 245 #if YYLSP_NEEDED
 246   yylloc.last_column = 0;
 247   yylloc.last_line = 1;
 248 #endif
 249   yyparse ();
 250   return 0;
 251 }
 252 ]])
 253 ])# _AT_DATA_CALC_Y
 254
 255
 256 # AT_DATA_CALC_Y([BISON-OPTIONS])
 257 # -------------------------------
 258 # Produce `calc.y'.
 259 m4_define([AT_DATA_CALC_Y],
 260 [_AT_DATA_CALC_Y($[1], $[2], $[3],
 261                  [m4_bmatch([$1], [--yyerror-verbose],
 262                             [[%error-verbose]])])])
 263
 264
 265
 266 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
 267 # ------------------------------------------------------------
 268 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 269 #
 270 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 271 # of expected lines on stderr.
 272 m4_define([_AT_CHECK_CALC],
 273 [AT_DATA([[input]],
 274 [[$2
 275 ]])
 276 AT_CHECK([calc input], 0, [], [stderr])dnl
 277 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 278          [m4_bmatch([$1], [--debug],
 279                     [$3], [0])
 280 ])
 281 ])
 282
 283
 284 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
 285 #                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
 286 # ------------------------------------------------------------
 287 # Run `calc' on INPUT, and expect a `parse error' message.
 288 #
 289 # If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
 290 # is correctly output on stderr.
 291 #
 292 # If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
 293 # IF-YYERROR-VERBOSE message is properly output after `parse error, '
 294 # on STDERR.
 295 #
 296 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 297 # of expected lines on stderr.
 298 m4_define([_AT_CHECK_CALC_ERROR],
 299 [AT_DATA([[input]],
 300 [[$2
 301 ]])
 302
 303 AT_CHECK([calc input], 0, [], [stderr])
 304
 305
 306 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 307          [m4_bmatch([$1], [--debug],
 308                     [$3], [1])
 309 ])
 310
 311 egrep -v '^((Start|Enter|Read|Reduc|Shift)ing|state|Error:) ' stderr >at-stderr
 312 mv at-stderr stderr
 313
 314 AT_CHECK([cat stderr], 0,
 315 [m4_bmatch([$1], [--location], [$4: ])[]dnl
 316 parse error[]dnl
 317 m4_bmatch([$1], [--yyerror-verbose], [, $5])[]dnl
 318
 319 ])
 320
 321 ])
 322
 323
 324 # AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
 325 # --------------------------------------------------------
 326 # Start a testing chunk which compiles `calc' grammar with
 327 # BISON-OPTIONS, and performs several tests over the parser.
 328 m4_define([AT_CHECK_CALC],
 329 [# We use integers to avoid dependencies upon the precision of doubles.
 330 AT_SETUP([Calculator $1])
 331
 332 AT_DATA_CALC_Y([$1])
 333
 334 # Specify the output files to avoid problems on different file systems.
 335 AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
 336          [0], [], [])
 337
 338 # Some compilers issue warnings we don't want to hear about.
 339 # Maybe some day we will have proper Autoconf macros to disable these
 340 # warnings, but this place is not the right one for that.
 341 # So let's keep only GCC warnings, which we know are sane.
 342 # Well, that's only part of the story: some assemblers issue warnings
 343 # which can be totally useless, and actually polluting.  It seems that
 344 # the best bet be to completely ignore stderr, but to pass -Werror
 345 # to GCC.
 346 if test "$GCC" = yes; then
 347   CFLAGS="$CFLAGS -Werror"
 348 fi
 349 AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [ignore])
 350
 351 # Test the priorities.
 352 _AT_CHECK_CALC([$1],
 353 [1 + 2 * 3 = 7
 354 1 + 2 * -3 = -5
 355
 356 -1^2 = -1
 357 (-1)^2 = 1
 358
 359 ---1 = -1
 360
 361 1 - 2 - 3 = -4
 362 1 - (2 - 3) = 2
 363
 364 2^2^3 = 256
 365 (2^2)^3 = 64], [491])
 366
 367 # Some parse errors.
 368 _AT_CHECK_CALC_ERROR([$1], [+1], [8],
 369                      [1.0:1.1],
 370                      [unexpected '+'])
 371 _AT_CHECK_CALC_ERROR([$1], [1//2], [17],
 372                      [1.2:1.3],
 373                      [unexpected '/', expecting NUM or '-' or '('])
 374 _AT_CHECK_CALC_ERROR([$1], [error], [8],
 375                      [1.0:1.1],
 376                      [unexpected $undefined.])
 377 _AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [23],
 378                      [1.6:1.7],
 379                      [unexpected '='])
 380 _AT_CHECK_CALC_ERROR([$1],
 381                      [
 382 +1],
 383                      [16],
 384                      [2.0:2.1],
 385                      [unexpected '+'])
 386
 387 AT_CLEANUP
 388 ])# AT_CHECK_CALC
 389
 390
 391
 392
 393 # ------------------ #
 394 # Test the parsers.  #
 395 # ------------------ #
 396
 397 AT_CHECK_CALC()
 398
 399 AT_CHECK_CALC([--defines])
 400 AT_CHECK_CALC([--locations])
 401 AT_CHECK_CALC([--name-prefix=calc])
 402 AT_CHECK_CALC([--verbose])
 403 AT_CHECK_CALC([--yacc])
 404 AT_CHECK_CALC([--yyerror-verbose])
 405
 406 AT_CHECK_CALC([--locations --yyerror-verbose])
 407
 408 AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
 409
 410 AT_CHECK_CALC([--debug])
 411 AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])