tests/calc.at

   1 # Checking the output filenames.                         -*- Autotest -*-
   2 # Copyright (C) 2000, 2001, 2002 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 /* Exercise pre-prologue dependency to %union.  */
  66 typedef int value_t;
  67
  68 %}
  69
  70 /* Exercise %union. */
  71 %union
  72 {
  73   value_t ival;
  74 };
  75
  76 /* Bison Declarations */
  77 %token CALC_EOF 0 "end of file"
  78 %token <ival> NUM "number"
  79 %type  <ival> exp
  80
  81 %nonassoc '=' /* comparison            */
  82 %left '-' '+'
  83 %left '*' '/'
  84 %left NEG     /* negation--unary minus */
  85 %right '^'    /* exponentiation        */
  86
  87 ]$4[
  88
  89 /* Grammar follows */
  90 %%
  91 input:
  92   line
  93 | input line
  94 ;
  95
  96 line:
  97   '\n'      {}
  98 | exp '\n'  {}
  99 ;
 100
 101 exp:
 102   NUM                { $$ = $1;             }
 103 | exp '=' exp
 104   {
 105      if ($1 != $3)
 106        fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
 107      $$ = $1 == $3;
 108   }
 109 | exp '+' exp        { $$ = $1 + $3;        }
 110 | exp '-' exp        { $$ = $1 - $3;        }
 111 | exp '*' exp        { $$ = $1 * $3;        }
 112 | exp '/' exp        { $$ = $1 / $3;        }
 113 | '-' exp  %prec NEG { $$ = -$2;            }
 114 | exp '^' exp        { $$ = power ($1, $3); }
 115 | '(' exp ')'        { $$ = $2;             }
 116 | '(' error ')'      { $$ = 0;              }
 117 ;
 118 %%
 119 /* The input. */
 120 FILE *yyin;
 121
 122 static void
 123 yyerror (const char *s)
 124 {
 125 #if YYLSP_NEEDED
 126   fprintf (stderr, "%d.%d-%d.%d: ",
 127            yylloc.first_line, yylloc.first_column,
 128            yylloc.last_line, yylloc.last_column);
 129 #endif
 130   fprintf (stderr, "%s\n", s);
 131 }
 132
 133
 134 #if YYLSP_NEEDED
 135 static YYLTYPE last_yylloc;
 136 #endif
 137 static int
 138 yygetc (void)
 139 {
 140   int res = getc (yyin);
 141 #if YYLSP_NEEDED
 142   last_yylloc = yylloc;
 143   if (res == '\n')
 144     {
 145       yylloc.last_line++;
 146       yylloc.last_column = 1;
 147     }
 148   else
 149     yylloc.last_column++;
 150 #endif
 151   return res;
 152 }
 153
 154
 155 static void
 156 yyungetc (int c)
 157 {
 158 #if YYLSP_NEEDED
 159   /* Wrong when C == `\n'. */
 160   yylloc = last_yylloc;
 161 #endif
 162   ungetc (c, yyin);
 163 }
 164
 165 static int
 166 read_signed_integer (void)
 167 {
 168   int c = yygetc ();
 169   int sign = 1;
 170   int n = 0;
 171
 172   if (c == '-')
 173     {
 174       c = yygetc ();
 175       sign = -1;
 176     }
 177
 178   while (isdigit (c))
 179     {
 180       n = 10 * n + (c - '0');
 181       c = yygetc ();
 182     }
 183
 184   yyungetc (c);
 185
 186   return sign * n;
 187 }
 188
 189
 190
 191 /*---------------------------------------------------------------.
 192 | Lexical analyzer returns an integer on the stack and the token |
 193 | NUM, or the ASCII character read if not a number.  Skips all   |
 194 | blanks and tabs, returns 0 for EOF.                            |
 195 `---------------------------------------------------------------*/
 196
 197 static int
 198 yylex (void)
 199 {
 200   int c;
 201
 202 #if YYLSP_NEEDED
 203   yylloc.first_column = yylloc.last_column;
 204   yylloc.first_line = yylloc.last_line;
 205 #endif
 206
 207   /* Skip white space.  */
 208   while ((c = yygetc ()) == ' ' || c == '\t')
 209     {
 210 #if YYLSP_NEEDED
 211       yylloc.first_column = yylloc.last_column;
 212       yylloc.first_line = yylloc.last_line;
 213 #endif
 214     }
 215
 216   /* process numbers   */
 217   if (c == '.' || isdigit (c))
 218     {
 219       yyungetc (c);
 220       yylval.ival = read_signed_integer ();
 221       return NUM;
 222     }
 223
 224   /* Return end-of-file.  */
 225   if (c == EOF)
 226     return CALC_EOF;
 227
 228   /* Return single chars. */
 229   return c;
 230 }
 231
 232 static int
 233 power (int base, int exponent)
 234 {
 235   int res = 1;
 236   if (exponent < 0)
 237     exit (1);
 238   for (/* Niente */; exponent; --exponent)
 239     res *= base;
 240   return res;
 241 }
 242
 243 int
 244 main (int argc, const char **argv)
 245 {
 246   yyin = NULL;
 247
 248   if (argc == 2)
 249     yyin = fopen (argv[1], "r");
 250   else
 251     yyin = stdin;
 252
 253   if (!yyin)
 254     {
 255       perror (argv[1]);
 256       exit (1);
 257     }
 258
 259 #if YYDEBUG
 260   yydebug = 1;
 261 #endif
 262 #if YYLSP_NEEDED
 263   yylloc.last_column = 1;
 264   yylloc.last_line = 1;
 265 #endif
 266   yyparse ();
 267   return 0;
 268 }
 269 ]])
 270 ])# _AT_DATA_CALC_Y
 271
 272
 273 # AT_DATA_CALC_Y([BISON-OPTIONS])
 274 # -------------------------------
 275 # Produce `calc.y'.
 276 m4_define([AT_DATA_CALC_Y],
 277 [_AT_DATA_CALC_Y($[1], $[2], $[3],
 278                  [m4_bmatch([$1], [--yyerror-verbose],
 279                             [[%error-verbose]])])])
 280
 281
 282
 283 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
 284 # ------------------------------------------------------------
 285 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 286 #
 287 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 288 # of expected lines on stderr.
 289 m4_define([_AT_CHECK_CALC],
 290 [AT_DATA([[input]],
 291 [[$2
 292 ]])
 293 AT_PARSER_CHECK([./calc input], 0, [], [stderr])dnl
 294 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 295          [m4_bmatch([$1], [--debug],
 296                     [$3], [0])
 297 ])
 298 ])
 299
 300
 301 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
 302 #                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
 303 # ------------------------------------------------------------
 304 # Run `calc' on INPUT, and expect a `parse error' message.
 305 #
 306 # If INPUT starts with a slash, it is used as absolute input file name,
 307 # otherwise as contents.
 308 #
 309 # If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
 310 # is correctly output on stderr.
 311 #
 312 # If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
 313 # IF-YYERROR-VERBOSE message is properly output after `parse error, '
 314 # on STDERR.
 315 #
 316 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 317 # of expected lines on stderr.
 318 m4_define([_AT_CHECK_CALC_ERROR],
 319 [m4_bmatch([$2], [^/],
 320            [AT_PARSER_CHECK([./calc $2], 0, [], [stderr])],
 321            [AT_DATA([[input]],
 322 [[$2
 323 ]])
 324 AT_PARSER_CHECK([./calc input], 0, [], [stderr])])
 325
 326 m4_bmatch([$1], [--debug],
 327 [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
 328 ])])
 329
 330 # Normalize the observed and expected error messages, depending upon the
 331 # options.
 332 # 1. Remove the traces from observed.
 333 sed '/^Starting/d
 334 /^Entering/d
 335 /^Reading/d
 336 /^Reducing/d
 337 /^Shifting/d
 338 /^state/d
 339 /^Error:/d
 340 /^Next/d
 341 /^Discarding/d
 342 /^yydestructor:/d' stderr >at-stderr
 343 mv at-stderr stderr
 344 # 2. Create the reference error message.
 345 AT_DATA([[expout]],
 346 [$4
 347 ])
 348 # 3. If locations are not used, remove them.
 349 m4_bmatch([$1], [--location], [],
 350 [[sed 's/^[-0-9.]*: //' expout >at-expout
 351 mv at-expout expout]])
 352 # 4. If error-verbose is not used, strip the`, unexpected....' part.
 353 m4_bmatch([$1], [--yyerror-verbose], [],
 354 [[sed 's/parse error, .*$/parse error/' expout >at-expout
 355 mv at-expout expout]])
 356 # 5. Check
 357 AT_CHECK([cat stderr], 0, [expout])
 358 ])
 359
 360
 361 # AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
 362 # --------------------------------------------------------
 363 # Start a testing chunk which compiles `calc' grammar with
 364 # BISON-OPTIONS, and performs several tests over the parser.
 365 m4_define([AT_CHECK_CALC],
 366 [# We use integers to avoid dependencies upon the precision of doubles.
 367 AT_SETUP([Calculator $1])
 368
 369 AT_DATA_CALC_Y([$1])
 370
 371 # Specify the output files to avoid problems on different file systems.
 372 AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
 373          [0], [], [])
 374
 375 AT_COMPILE([calc])
 376
 377 # Test the priorities.
 378 _AT_CHECK_CALC([$1],
 379 [1 + 2 * 3 = 7
 380 1 + 2 * -3 = -5
 381
 382 -1^2 = -1
 383 (-1)^2 = 1
 384
 385 ---1 = -1
 386
 387 1 - 2 - 3 = -4
 388 1 - (2 - 3) = 2
 389
 390 2^2^3 = 256
 391 (2^2)^3 = 64], [486])
 392
 393 # Some parse errors.
 394 _AT_CHECK_CALC_ERROR([$1], [0 0], [11],
 395                      [1.3-1.4: parse error, unexpected "number"])
 396 _AT_CHECK_CALC_ERROR([$1], [1//2], [15],
 397                      [1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
 398 _AT_CHECK_CALC_ERROR([$1], [error], [4],
 399                      [1.1-1.2: parse error, unexpected $undefined., expecting "number" or '-' or '\n' or '('])
 400 _AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [22],
 401                      [1.7-1.8: parse error, unexpected '='])
 402 _AT_CHECK_CALC_ERROR([$1],
 403                      [
 404 +1],
 405                      [14],
 406                      [2.1-2.2: parse error, unexpected '+'])
 407 # Exercise error messages with EOF: work on an empty file.
 408 _AT_CHECK_CALC_ERROR([$1], [/dev/null], [4],
 409                      [1.1-1.2: parse error, unexpected "end of file", expecting "number" or '-' or '\n' or '('])
 410
 411 # Exercise the error token: without it, we die at the first error,
 412 # hence be sure i. to have several errors, ii. to test the action
 413 # associated to `error'.
 414 _AT_CHECK_CALC_ERROR([$1], [(1 ++ 2) + (0 0) = 1], [82],
 415 [1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
 416 1.15-1.16: parse error, unexpected "number"
 417 calc: error: 0 != 1])
 418
 419 # Add a studid example demonstrating that Bison can further improve the
 420 # error message.  FIXME: Fix this ridiculous message.
 421 _AT_CHECK_CALC_ERROR([$1], [()], [21],
 422 [1.2-1.3: parse error, unexpected ')', expecting error or "number" or '-' or '('])
 423
 424 AT_CLEANUP
 425 ])# AT_CHECK_CALC
 426
 427
 428
 429
 430 # ------------------ #
 431 # Test the parsers.  #
 432 # ------------------ #
 433
 434 AT_CHECK_CALC()
 435
 436 AT_CHECK_CALC([--defines])
 437 AT_CHECK_CALC([--locations])
 438 AT_CHECK_CALC([--name-prefix=calc])
 439 AT_CHECK_CALC([--verbose])
 440 AT_CHECK_CALC([--yacc])
 441 AT_CHECK_CALC([--yyerror-verbose])
 442
 443 AT_CHECK_CALC([--locations --yyerror-verbose])
 444
 445 AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
 446
 447 AT_CHECK_CALC([--debug])
 448 AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])