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                { $$ = $1;             }
  99 | exp '=' exp
 100   {
 101      if ($1 != $3)
 102        printf ("calc: error: %d != %d\n", $1, $3);
 103      $$ = $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 ;
 113 %%
 114 /* The input. */
 115 FILE *yyin;
 116
 117 static void
 118 yyerror (const char *s)
 119 {
 120 #if YYLSP_NEEDED
 121   fprintf (stderr, "%d.%d:%d.%d: ",
 122            yylloc.first_line, yylloc.first_column,
 123            yylloc.last_line, yylloc.last_column);
 124 #endif
 125   fprintf (stderr, "%s\n", s);
 126 }
 127
 128
 129 #if YYLSP_NEEDED
 130 static YYLTYPE last_yylloc;
 131 #endif
 132 static int
 133 yygetc (void)
 134 {
 135   int res = getc (yyin);
 136 #if YYLSP_NEEDED
 137   last_yylloc = yylloc;
 138   if (res == '\n')
 139     {
 140       yylloc.last_line++;
 141       yylloc.last_column = 0;
 142     }
 143   else
 144     yylloc.last_column++;
 145 #endif
 146   return res;
 147 }
 148
 149
 150 static void
 151 yyungetc (int c)
 152 {
 153 #if YYLSP_NEEDED
 154   /* Wrong when C == `\n'. */
 155   yylloc = last_yylloc;
 156 #endif
 157   ungetc (c, yyin);
 158 }
 159
 160 static int
 161 read_signed_integer (void)
 162 {
 163   int c = yygetc ();
 164   int sign = 1;
 165   int n = 0;
 166
 167   if (c == '-')
 168     {
 169       c = yygetc ();
 170       sign = -1;
 171     }
 172
 173   while (isdigit (c))
 174     {
 175       n = 10 * n + (c - '0');
 176       c = yygetc ();
 177     }
 178
 179   yyungetc (c);
 180
 181   return sign * n;
 182 }
 183
 184
 185
 186 /*---------------------------------------------------------------.
 187 | Lexical analyzer returns an integer on the stack and the token |
 188 | NUM, or the ASCII character read if not a number.  Skips all   |
 189 | blanks and tabs, returns 0 for EOF.                            |
 190 `---------------------------------------------------------------*/
 191
 192 static int
 193 yylex (void)
 194 {
 195   int c;
 196
 197 #if YYLSP_NEEDED
 198   yylloc.first_column = yylloc.last_column;
 199   yylloc.first_line = yylloc.last_line;
 200 #endif
 201
 202   /* Skip white space.  */
 203   while ((c = yygetc ()) == ' ' || c == '\t')
 204     {
 205 #if YYLSP_NEEDED
 206       yylloc.first_column = yylloc.last_column;
 207       yylloc.first_line = yylloc.last_line;
 208 #endif
 209     }
 210
 211   /* process numbers   */
 212   if (c == '.' || isdigit (c))
 213     {
 214       yyungetc (c);
 215       yylval.ival = read_signed_integer ();
 216       return NUM;
 217     }
 218
 219   /* Return end-of-file.  */
 220   if (c == EOF)
 221     return CALC_EOF;
 222
 223   /* Return single chars. */
 224   return c;
 225 }
 226
 227 static int
 228 power (int base, int exponent)
 229 {
 230   int res = 1;
 231   if (exponent < 0)
 232     exit (1);
 233   for (/* Niente */; exponent; --exponent)
 234     res *= base;
 235   return res;
 236 }
 237
 238 int
 239 main (int argc, const char **argv)
 240 {
 241   yyin = NULL;
 242
 243   if (argc == 2)
 244     yyin = fopen (argv[1], "r");
 245   else
 246     yyin = stdin;
 247
 248   if (!yyin)
 249     {
 250       perror (argv[1]);
 251       exit (1);
 252     }
 253
 254 #if YYDEBUG
 255   yydebug = 1;
 256 #endif
 257 #if YYLSP_NEEDED
 258   yylloc.last_column = 0;
 259   yylloc.last_line = 1;
 260 #endif
 261   yyparse ();
 262   return 0;
 263 }
 264 ]])
 265 ])# _AT_DATA_CALC_Y
 266
 267
 268 # AT_DATA_CALC_Y([BISON-OPTIONS])
 269 # -------------------------------
 270 # Produce `calc.y'.
 271 m4_define([AT_DATA_CALC_Y],
 272 [_AT_DATA_CALC_Y($[1], $[2], $[3],
 273                  [m4_bmatch([$1], [--yyerror-verbose],
 274                             [[%error-verbose]])])])
 275
 276
 277
 278 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
 279 # ------------------------------------------------------------
 280 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 281 #
 282 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 283 # of expected lines on stderr.
 284 m4_define([_AT_CHECK_CALC],
 285 [AT_DATA([[input]],
 286 [[$2
 287 ]])
 288 AT_CHECK([calc input], 0, [], [stderr])dnl
 289 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 290          [m4_bmatch([$1], [--debug],
 291                     [$3], [0])
 292 ])
 293 ])
 294
 295
 296 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
 297 #                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
 298 # ------------------------------------------------------------
 299 # Run `calc' on INPUT, and expect a `parse error' message.
 300 #
 301 # If INPUT starts with a slash, it is used as absolute input file name,
 302 # otherwise as contents.
 303 #
 304 # If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
 305 # is correctly output on stderr.
 306 #
 307 # If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
 308 # IF-YYERROR-VERBOSE message is properly output after `parse error, '
 309 # on STDERR.
 310 #
 311 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 312 # of expected lines on stderr.
 313 m4_define([_AT_CHECK_CALC_ERROR],
 314 [m4_bmatch([$2], [^/],
 315            [AT_CHECK([calc $2], 0, [], [stderr])],
 316            [AT_DATA([[input]],
 317 [[$2
 318 ]])
 319 AT_CHECK([calc input], 0, [], [stderr])])
 320
 321
 322 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 323          [m4_bmatch([$1], [--debug],
 324                     [$3], [1])
 325 ])
 326
 327 egrep -v '^((Start|Enter|Read|Reduc|Shift)ing|state|Error:) ' stderr >at-stderr
 328 mv at-stderr stderr
 329
 330 AT_CHECK([cat stderr], 0,
 331 [m4_bmatch([$1], [--location], [$4: ])[]dnl
 332 parse error[]dnl
 333 m4_bmatch([$1], [--yyerror-verbose], [, $5])[]dnl
 334
 335 ])
 336
 337 ])
 338
 339
 340 # AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
 341 # --------------------------------------------------------
 342 # Start a testing chunk which compiles `calc' grammar with
 343 # BISON-OPTIONS, and performs several tests over the parser.
 344 m4_define([AT_CHECK_CALC],
 345 [# We use integers to avoid dependencies upon the precision of doubles.
 346 AT_SETUP([Calculator $1])
 347
 348 AT_DATA_CALC_Y([$1])
 349
 350 # Specify the output files to avoid problems on different file systems.
 351 AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
 352          [0], [], [])
 353
 354 # Some compilers issue warnings we don't want to hear about.
 355 # Maybe some day we will have proper Autoconf macros to disable these
 356 # warnings, but this place is not the right one for that.
 357 # So let's keep only GCC warnings, which we know are sane.
 358 # Well, that's only part of the story: some assemblers issue warnings
 359 # which can be totally useless, and actually polluting.  It seems that
 360 # the best bet be to completely ignore stderr, but to pass -Werror
 361 # to GCC.
 362 if test "$GCC" = yes; then
 363   CFLAGS="$CFLAGS -Werror"
 364 fi
 365 AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [ignore])
 366
 367 # Test the priorities.
 368 _AT_CHECK_CALC([$1],
 369 [1 + 2 * 3 = 7
 370 1 + 2 * -3 = -5
 371
 372 -1^2 = -1
 373 (-1)^2 = 1
 374
 375 ---1 = -1
 376
 377 1 - 2 - 3 = -4
 378 1 - (2 - 3) = 2
 379
 380 2^2^3 = 256
 381 (2^2)^3 = 64], [486])
 382
 383 # Some parse errors.
 384 _AT_CHECK_CALC_ERROR([$1], [0 0], [10],
 385                      [1.2:1.3],
 386                      [unexpected "number"])
 387 _AT_CHECK_CALC_ERROR([$1], [1//2], [13],
 388                      [1.2:1.3],
 389                      [unexpected '/', expecting "number" or '-' or '('])
 390 _AT_CHECK_CALC_ERROR([$1], [error], [4],
 391                      [1.0:1.1],
 392                      [unexpected $undefined., expecting "number" or '-' or '\n' or '('])
 393 _AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [19],
 394                      [1.6:1.7],
 395                      [unexpected '='])
 396 _AT_CHECK_CALC_ERROR([$1],
 397                      [
 398 +1],
 399                      [13],
 400                      [2.0:2.1],
 401                      [unexpected '+'])
 402 # Exercise error messages with EOF: work on an empty file.
 403 _AT_CHECK_CALC_ERROR([$1],
 404                      [/dev/null],
 405                      [4],
 406                      [1.0:1.1],
 407                      [unexpected "end of file", expecting "number" or '-' or '\n' or '('])
 408
 409 AT_CLEANUP
 410 ])# AT_CHECK_CALC
 411
 412
 413
 414
 415 # ------------------ #
 416 # Test the parsers.  #
 417 # ------------------ #
 418
 419 AT_CHECK_CALC()
 420
 421 AT_CHECK_CALC([--defines])
 422 AT_CHECK_CALC([--locations])
 423 AT_CHECK_CALC([--name-prefix=calc])
 424 AT_CHECK_CALC([--verbose])
 425 AT_CHECK_CALC([--yacc])
 426 AT_CHECK_CALC([--yyerror-verbose])
 427
 428 AT_CHECK_CALC([--locations --yyerror-verbose])
 429
 430 AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
 431
 432 AT_CHECK_CALC([--debug])
 433 AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])