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 /* Also exercise %union. */
  67 %union
  68 {
  69   int ival; /* A comment to exercise an old bug. */
  70 };
  71
  72 /* Bison Declarations */
  73 %token CALC_EOF 0 "end of file"
  74 %token <ival> NUM "number"
  75 %type  <ival> exp
  76
  77 %nonassoc '=' /* comparison            */
  78 %left '-' '+'
  79 %left '*' '/'
  80 %left NEG     /* negation--unary minus */
  81 %right '^'    /* exponentiation        */
  82
  83 ]$4[
  84
  85 /* Grammar follows */
  86 %%
  87 input:
  88   line
  89 | input line
  90 ;
  91
  92 line:
  93   '\n'
  94 | exp '\n' {}
  95 ;
  96
  97 exp:
  98   NUM                { $$ = $1;             }
  99 | exp '=' exp
 100   {
 101      if ($1 != $3)
 102        fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
 103      $$ = $1 == $3;
 104   }
 105 | exp '+' exp        { $$ = $1 + $3;        }
 106 | exp '-' exp        { $$ = $1 - $3;        }
 107 | exp '*' exp        { $$ = $1 * $3;        }
 108 | exp '/' exp        { $$ = $1 / $3;        }
 109 | '-' exp  %prec NEG { $$ = -$2;            }
 110 | exp '^' exp        { $$ = power ($1, $3); }
 111 | '(' exp ')'        { $$ = $2;             }
 112 | '(' error ')'      { $$ = 0;              }
 113 ;
 114 %%
 115 /* The input. */
 116 FILE *yyin;
 117
 118 static void
 119 yyerror (const char *s)
 120 {
 121 #if YYLSP_NEEDED
 122   fprintf (stderr, "%d.%d-%d.%d: ",
 123            yylloc.first_line, yylloc.first_column,
 124            yylloc.last_line, yylloc.last_column);
 125 #endif
 126   fprintf (stderr, "%s\n", s);
 127 }
 128
 129
 130 #if YYLSP_NEEDED
 131 static YYLTYPE last_yylloc;
 132 #endif
 133 static int
 134 yygetc (void)
 135 {
 136   int res = getc (yyin);
 137 #if YYLSP_NEEDED
 138   last_yylloc = yylloc;
 139   if (res == '\n')
 140     {
 141       yylloc.last_line++;
 142       yylloc.last_column = 1;
 143     }
 144   else
 145     yylloc.last_column++;
 146 #endif
 147   return res;
 148 }
 149
 150
 151 static void
 152 yyungetc (int c)
 153 {
 154 #if YYLSP_NEEDED
 155   /* Wrong when C == `\n'. */
 156   yylloc = last_yylloc;
 157 #endif
 158   ungetc (c, yyin);
 159 }
 160
 161 static int
 162 read_signed_integer (void)
 163 {
 164   int c = yygetc ();
 165   int sign = 1;
 166   int n = 0;
 167
 168   if (c == '-')
 169     {
 170       c = yygetc ();
 171       sign = -1;
 172     }
 173
 174   while (isdigit (c))
 175     {
 176       n = 10 * n + (c - '0');
 177       c = yygetc ();
 178     }
 179
 180   yyungetc (c);
 181
 182   return sign * n;
 183 }
 184
 185
 186
 187 /*---------------------------------------------------------------.
 188 | Lexical analyzer returns an integer on the stack and the token |
 189 | NUM, or the ASCII character read if not a number.  Skips all   |
 190 | blanks and tabs, returns 0 for EOF.                            |
 191 `---------------------------------------------------------------*/
 192
 193 static int
 194 yylex (void)
 195 {
 196   int c;
 197
 198 #if YYLSP_NEEDED
 199   yylloc.first_column = yylloc.last_column;
 200   yylloc.first_line = yylloc.last_line;
 201 #endif
 202
 203   /* Skip white space.  */
 204   while ((c = yygetc ()) == ' ' || c == '\t')
 205     {
 206 #if YYLSP_NEEDED
 207       yylloc.first_column = yylloc.last_column;
 208       yylloc.first_line = yylloc.last_line;
 209 #endif
 210     }
 211
 212   /* process numbers   */
 213   if (c == '.' || isdigit (c))
 214     {
 215       yyungetc (c);
 216       yylval.ival = read_signed_integer ();
 217       return NUM;
 218     }
 219
 220   /* Return end-of-file.  */
 221   if (c == EOF)
 222     return CALC_EOF;
 223
 224   /* Return single chars. */
 225   return c;
 226 }
 227
 228 static int
 229 power (int base, int exponent)
 230 {
 231   int res = 1;
 232   if (exponent < 0)
 233     exit (1);
 234   for (/* Niente */; exponent; --exponent)
 235     res *= base;
 236   return res;
 237 }
 238
 239 int
 240 main (int argc, const char **argv)
 241 {
 242   yyin = NULL;
 243
 244   if (argc == 2)
 245     yyin = fopen (argv[1], "r");
 246   else
 247     yyin = stdin;
 248
 249   if (!yyin)
 250     {
 251       perror (argv[1]);
 252       exit (1);
 253     }
 254
 255 #if YYDEBUG
 256   yydebug = 1;
 257 #endif
 258 #if YYLSP_NEEDED
 259   yylloc.last_column = 1;
 260   yylloc.last_line = 1;
 261 #endif
 262   yyparse ();
 263   return 0;
 264 }
 265 ]])
 266 ])# _AT_DATA_CALC_Y
 267
 268
 269 # AT_DATA_CALC_Y([BISON-OPTIONS])
 270 # -------------------------------
 271 # Produce `calc.y'.
 272 m4_define([AT_DATA_CALC_Y],
 273 [_AT_DATA_CALC_Y($[1], $[2], $[3],
 274                  [m4_bmatch([$1], [--yyerror-verbose],
 275                             [[%error-verbose]])])])
 276
 277
 278
 279 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
 280 # ------------------------------------------------------------
 281 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 282 #
 283 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 284 # of expected lines on stderr.
 285 m4_define([_AT_CHECK_CALC],
 286 [AT_DATA([[input]],
 287 [[$2
 288 ]])
 289 AT_CHECK([./calc input], 0, [], [stderr])dnl
 290 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 291          [m4_bmatch([$1], [--debug],
 292                     [$3], [0])
 293 ])
 294 ])
 295
 296
 297 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
 298 #                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
 299 # ------------------------------------------------------------
 300 # Run `calc' on INPUT, and expect a `parse error' message.
 301 #
 302 # If INPUT starts with a slash, it is used as absolute input file name,
 303 # otherwise as contents.
 304 #
 305 # If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
 306 # is correctly output on stderr.
 307 #
 308 # If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
 309 # IF-YYERROR-VERBOSE message is properly output after `parse error, '
 310 # on STDERR.
 311 #
 312 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 313 # of expected lines on stderr.
 314 m4_define([_AT_CHECK_CALC_ERROR],
 315 [m4_bmatch([$2], [^/],
 316            [AT_CHECK([./calc $2], 0, [], [stderr])],
 317            [AT_DATA([[input]],
 318 [[$2
 319 ]])
 320 AT_CHECK([./calc input], 0, [], [stderr])])
 321
 322 m4_bmatch([$1], [--debug],
 323 [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
 324 ])])
 325
 326 # Normalize the observed and expected error messages, depending upon the
 327 # options.
 328 # 1. Remove the traces from observed.
 329 egrep -v '^((Start|Enter|Read|Reduc|Shift)ing|state|Error:|Next|Discarding) ' stderr >at-stderr
 330 mv at-stderr stderr
 331 # 2. Create the reference error message.
 332 AT_DATA([[expout]],
 333 [$4
 334 ])
 335 # 3. If locations are not used, remove them.
 336 m4_bmatch([$1], [--location], [],
 337 [[sed 's/^[-0-9.]*: //' expout >at-expout
 338 mv at-expout expout]])
 339 # 4. If error-verbose is not used, strip the`, unexpected....' part.
 340 m4_bmatch([$1], [--yyerror-verbose], [],
 341 [[sed 's/parse error, .*$/parse error/' expout >at-expout
 342 mv at-expout expout]])
 343 # 5. Check
 344 AT_CHECK([cat stderr], 0, [expout])
 345 ])
 346
 347
 348 # AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
 349 # --------------------------------------------------------
 350 # Start a testing chunk which compiles `calc' grammar with
 351 # BISON-OPTIONS, and performs several tests over the parser.
 352 m4_define([AT_CHECK_CALC],
 353 [# We use integers to avoid dependencies upon the precision of doubles.
 354 AT_SETUP([Calculator $1])
 355
 356 AT_DATA_CALC_Y([$1])
 357
 358 # Specify the output files to avoid problems on different file systems.
 359 AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
 360          [0], [], [])
 361
 362 AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [ignore])
 363
 364 # Test the priorities.
 365 _AT_CHECK_CALC([$1],
 366 [1 + 2 * 3 = 7
 367 1 + 2 * -3 = -5
 368
 369 -1^2 = -1
 370 (-1)^2 = 1
 371
 372 ---1 = -1
 373
 374 1 - 2 - 3 = -4
 375 1 - (2 - 3) = 2
 376
 377 2^2^3 = 256
 378 (2^2)^3 = 64], [486])
 379
 380 # Some parse errors.
 381 _AT_CHECK_CALC_ERROR([$1], [0 0], [10],
 382                      [1.3-1.4: parse error, unexpected "number"])
 383 _AT_CHECK_CALC_ERROR([$1], [1//2], [13],
 384                      [1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
 385 _AT_CHECK_CALC_ERROR([$1], [error], [4],
 386                      [1.1-1.2: parse error, unexpected $undefined., expecting "number" or '-' or '\n' or '('])
 387 _AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [19],
 388                      [1.7-1.8: parse error, unexpected '='])
 389 _AT_CHECK_CALC_ERROR([$1],
 390                      [
 391 +1],
 392                      [13],
 393                      [2.1-2.2: parse error, unexpected '+'])
 394 # Exercise error messages with EOF: work on an empty file.
 395 _AT_CHECK_CALC_ERROR([$1],
 396                      [/dev/null],
 397                      [4],
 398                      [1.1-1.2: parse error, unexpected "end of file", expecting "number" or '-' or '\n' or '('])
 399
 400 # Exercise the error token: without it, we die at the first error,
 401 # hence be sure i. to have several errors, ii. to test the action
 402 # associated to `error'.
 403 _AT_CHECK_CALC_ERROR([$1],
 404                      [(1 ++ 2) + (0 0) = 1],
 405                      [76],
 406 [1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
 407 1.15-1.16: parse error, unexpected "number"
 408 calc: error: 0 != 1])
 409
 410 # Add a studid example demonstrating that Bison can further improve the
 411 # error message.  FIXME: Fix this ridiculous message.
 412 _AT_CHECK_CALC_ERROR([$1],
 413                      [()],
 414                      [21],
 415 [1.2-1.3: parse error, unexpected ')', expecting error or "number" or '-' or '('])
 416
 417 AT_CLEANUP
 418 ])# AT_CHECK_CALC
 419
 420
 421
 422
 423 # ------------------ #
 424 # Test the parsers.  #
 425 # ------------------ #
 426
 427 AT_CHECK_CALC()
 428
 429 AT_CHECK_CALC([--defines])
 430 AT_CHECK_CALC([--locations])
 431 AT_CHECK_CALC([--name-prefix=calc])
 432 AT_CHECK_CALC([--verbose])
 433 AT_CHECK_CALC([--yacc])
 434 AT_CHECK_CALC([--yyerror-verbose])
 435
 436 AT_CHECK_CALC([--locations --yyerror-verbose])
 437
 438 AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
 439
 440 AT_CHECK_CALC([--debug])
 441 AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])