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 ]$4[
  57
  58 static int power (int base, int exponent);
  59 static void yyerror (const char *s);
  60 static int yylex (void);
  61 static int yygetc (void);
  62 static void yyungetc (int c);
  63
  64 extern void perror (const char *s);
  65 %}
  66
  67 /* BISON Declarations */
  68 %token NUM
  69
  70 %nonassoc '=' /* comparison            */
  71 %left '-' '+'
  72 %left '*' '/'
  73 %left NEG     /* negation--unary minus */
  74 %right '^'    /* exponentiation        */
  75
  76 /* Grammar follows */
  77 %%
  78 input:
  79   /* empty string */
  80 | input line
  81 ;
  82
  83 line:
  84   '\n'
  85 | exp '\n'
  86 ;
  87
  88 exp:
  89   NUM                { $$ = $1;             }
  90 | exp '=' exp
  91   {
  92      if ($1 != $3)
  93        printf ("calc: error: %d != %d\n", $1, $3);
  94      $$ = $1 == $3;
  95   }
  96 | exp '+' exp        { $$ = $1 + $3;        }
  97 | exp '-' exp        { $$ = $1 - $3;        }
  98 | exp '*' exp        { $$ = $1 * $3;        }
  99 | exp '/' exp        { $$ = $1 / $3;        }
 100 | '-' exp  %prec NEG { $$ = -$2;            }
 101 | exp '^' exp        { $$ = power ($1, $3); }
 102 | '(' exp ')'        { $$ = $2;             }
 103 ;
 104 %%
 105 /* The input. */
 106 FILE *yyin;
 107
 108 static void
 109 yyerror (const char *s)
 110 {
 111 #if YYLSP_NEEDED
 112   fprintf (stderr, "%d.%d:%d.%d: ",
 113            yylloc.first_line, yylloc.first_column,
 114            yylloc.last_line, yylloc.last_column);
 115 #endif
 116   fprintf (stderr, "%s\n", s);
 117 }
 118
 119 static int
 120 yygetc (void)
 121 {
 122   int res = getc (yyin);
 123 #if YYLSP_NEEDED
 124   if (res == '\n')
 125     {
 126       yylloc.last_line++;
 127       yylloc.last_column = 0;
 128     }
 129   else
 130     yylloc.last_column++;
 131 #endif
 132   return res;
 133 }
 134
 135
 136 static void
 137 yyungetc (int c)
 138 {
 139 #if YYLSP_NEEDED
 140   /* Wrong when C == `\n'. */
 141   yylloc.last_column--;
 142 #endif
 143   ungetc (c, yyin);
 144 }
 145
 146 static int
 147 read_signed_integer (void)
 148 {
 149   int c = yygetc ();
 150   int sign = 1;
 151   int n = 0;
 152
 153   if (c == '-')
 154     {
 155       c = yygetc ();
 156       sign = -1;
 157     }
 158
 159   while (isdigit (c))
 160     {
 161       n = 10 * n + (c - '0');
 162       c = yygetc ();
 163     }
 164
 165   yyungetc (c);
 166
 167   return sign * n;
 168 }
 169
 170
 171
 172 /*---------------------------------------------------------------.
 173 | Lexical analyzer returns an integer on the stack and the token |
 174 | NUM, or the ASCII character read if not a number.  Skips all   |
 175 | blanks and tabs, returns 0 for EOF.                            |
 176 `---------------------------------------------------------------*/
 177
 178 static int
 179 yylex (void)
 180 {
 181   int c;
 182
 183 #if YYLSP_NEEDED
 184   yylloc.first_column = yylloc.last_column;
 185   yylloc.first_line = yylloc.last_line;
 186 #endif
 187
 188   /* Skip white space.  */
 189   while ((c = yygetc ()) == ' ' || c == '\t')
 190     {
 191 #if YYLSP_NEEDED
 192       yylloc.first_column = yylloc.last_column;
 193       yylloc.first_line = yylloc.last_line;
 194 #endif
 195     }
 196
 197   /* process numbers   */
 198   if (c == '.' || isdigit (c))
 199     {
 200       yyungetc (c);
 201       yylval = read_signed_integer ();
 202       return NUM;
 203     }
 204
 205   /* Return end-of-file.  */
 206   if (c == EOF)
 207     return 0;
 208
 209   /* Return single chars. */
 210   return c;
 211 }
 212
 213 static int
 214 power (int base, int exponent)
 215 {
 216   int res = 1;
 217   if (exponent < 0)
 218     exit (1);
 219   for (/* Niente */; exponent; --exponent)
 220     res *= base;
 221   return res;
 222 }
 223
 224 int
 225 main (int argc, const char **argv)
 226 {
 227   yyin = NULL;
 228
 229   if (argc == 2)
 230     yyin = fopen (argv[1], "r");
 231   else
 232     yyin = stdin;
 233
 234   if (!yyin)
 235     {
 236       perror (argv[1]);
 237       exit (1);
 238     }
 239
 240 #if YYDEBUG
 241   yydebug = 1;
 242 #endif
 243 #if YYLSP_NEEDED
 244   yylloc.last_column = 0;
 245   yylloc.last_line = 1;
 246 #endif
 247   yyparse ();
 248   return 0;
 249 }
 250 ]])
 251 ])# _AT_DATA_CALC_Y
 252
 253
 254 # AT_DATA_CALC_Y([BISON-OPTIONS])
 255 # -------------------------------
 256 # Produce `calc.y'.
 257 m4_define([AT_DATA_CALC_Y],
 258 [_AT_DATA_CALC_Y($[1], $[2], $[3],
 259                  [m4_match([$1], [--yyerror-verbose],
 260                            [[#define YYERROR_VERBOSE 1]])])])
 261
 262
 263
 264 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
 265 # ------------------------------------------------------------
 266 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
 267 #
 268 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 269 # of expected lines on stderr.
 270 m4_define([_AT_CHECK_CALC],
 271 [AT_DATA([[input]],
 272 [[$2
 273 ]])
 274 AT_CHECK([calc input], 0, [], [stderr])dnl
 275 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 276          [m4_bmatch([$1], [--debug],
 277                     [$3], [0])
 278 ])
 279 ])
 280
 281
 282 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
 283 #                      [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
 284 # ------------------------------------------------------------
 285 # Run `calc' on INPUT, and expect a `parse error' message.
 286 #
 287 # If BISON-OPTIONS contains `--location', then make sure the ERROR-LOCATION
 288 # is correctly output on stderr.
 289 #
 290 # If BISON-OPTIONS contains `--yyerror-verbose', then make sure the
 291 # IF-YYERROR-VERBOSE message is properly output after `parse error, '
 292 # on STDERR.
 293 #
 294 # If BISON-OPTIONS contains `--debug', then NUM-STDERR-LINES is the number
 295 # of expected lines on stderr.
 296 m4_define([_AT_CHECK_CALC_ERROR],
 297 [AT_DATA([[input]],
 298 [[$2
 299 ]])
 300
 301 AT_CHECK([calc input], 0, [], [stderr])
 302
 303
 304 AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0,
 305          [m4_bmatch([$1], [--debug],
 306                     [$3], [1])
 307 ])
 308
 309 egrep -v '^((Start|Enter|Read|Reduc|Shift)ing|state|Error:) ' stderr >at-stderr
 310 mv at-stderr stderr
 311
 312 AT_CHECK([cat stderr], 0,
 313 [m4_bmatch([$1], [--location], [$4: ])[]dnl
 314 parse error[]dnl
 315 m4_bmatch([$1], [--yyerror-verbose], [, $5])[]dnl
 316
 317 ])
 318
 319 ])
 320
 321
 322 # AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
 323 # --------------------------------------------------------
 324 # Start a testing chunk which compiles `calc' grammar with
 325 # BISON-OPTIONS, and performs several tests over the parser.
 326 m4_define([AT_CHECK_CALC],
 327 [# We use integers to avoid dependencies upon the precision of doubles.
 328 AT_SETUP([Calculator $1])
 329
 330 AT_DATA_CALC_Y([$1])
 331
 332 # Specify the output files to avoid problems on different file systems.
 333 AT_CHECK([bison calc.y -o calc.c m4_bpatsubst([$1], [--yyerror-verbose])],
 334          [0], [], [])
 335
 336 # Some compilers issue warnings we don't want to hear about.
 337 # Maybe some day we will have proper Autoconf macros to disable these
 338 # warnings, but this place is not the right one for that.
 339 # So let's keep only GCC warnings, which we know are sane.
 340 AT_CHECK([$CC $CFLAGS $CPPFLAGS calc.c -o calc], 0, [], [stderr])
 341 AT_CHECK([test "$GCC" = yes && cat stderr])
 342
 343 # Test the priorities.
 344 _AT_CHECK_CALC([$1],
 345 [1 + 2 * 3 = 7
 346 1 + 2 * -3 = -5
 347
 348 -1^2 = -1
 349 (-1)^2 = 1
 350
 351 ---1 = -1
 352
 353 1 - 2 - 3 = -4
 354 1 - (2 - 3) = 2
 355
 356 2^2^3 = 256
 357 (2^2)^3 = 64], [491])
 358
 359 # Some parse errors.
 360 _AT_CHECK_CALC_ERROR([$1], [+1], [8],
 361                      [1.0:1.1],
 362                      [unexpected `'+''])
 363 _AT_CHECK_CALC_ERROR([$1], [1//2], [17],
 364                      [1.2:1.3],
 365                      [unexpected `'/'', expecting `NUM' or `'-'' or `'(''])
 366 _AT_CHECK_CALC_ERROR([$1], [error], [8],
 367                      [1.0:1.1],
 368                      [unexpected `$undefined.'])
 369 _AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [23],
 370                      [1.6:1.7],
 371                      [unexpected `'=''])
 372 _AT_CHECK_CALC_ERROR([$1],
 373                      [
 374 +1],
 375                      [16],
 376                      [2.0:2.1],
 377                      [unexpected `'+''])
 378
 379 AT_CLEANUP(calc calc.c calc.h calc.output)
 380 ])# AT_CHECK_CALC
 381
 382
 383
 384
 385 # ------------------ #
 386 # Test the parsers.  #
 387 # ------------------ #
 388
 389 AT_CHECK_CALC()
 390
 391 AT_CHECK_CALC([--defines])
 392 AT_CHECK_CALC([--locations])
 393 AT_CHECK_CALC([--name-prefix=calc])
 394 AT_CHECK_CALC([--verbose])
 395 AT_CHECK_CALC([--yacc])
 396 AT_CHECK_CALC([--yyerror-verbose])
 397
 398 AT_CHECK_CALC([--locations --yyerror-verbose])
 399
 400 AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
 401
 402 AT_CHECK_CALC([--debug])
 403 AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])