# Checking the output filenames.                         -*- Autotest -*-
# Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

## ---------------------------------------------------- ##
## Compile the grammar described in the documentation.  ##
## ---------------------------------------------------- ##


# ------------------------- #
# Helping Autotest macros.  #
# ------------------------- #


# _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
# -----------------------------------------------
# Produce `calc.y'.  Don't call this macro directly, because it contains
# some occurrences of `$1' etc. which will be interpreted by m4.  So
# you should call it with $1, $2, and $3 as arguments, which is what
# AT_DATA_CALC_Y does.
m4_define([_AT_DATA_CALC_Y],
[m4_if([$1$2$3], $[1]$[2]$[3], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl
AT_DATA_GRAMMAR([calc.y],
[[/* Infix notation calculator--calc */
]$4[
%{
#include <stdio.h>

#if STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#endif
#include <ctype.h>
#include <assert.h>

extern void perror (const char *s);

/* Exercise pre-prologue dependency to %union.  */
typedef int value_t;

value_t global_result = 0;
int global_count = 0;

%}

/* Exercise %union. */
%union
{
  value_t ival;
};

%{
#if YYPURE
#  define LOC     (*yylloc)
#  define VAL     (*yylval)
#else
#  define LOC     (yylloc)
#  define VAL     (yylval)
#endif

#define YYLLOC_FORMAL   ]AT_LOCATION_IF([, YYLTYPE *yylloc])[
#define YYLLOC_ARG      ]AT_LOCATION_IF([, yylloc])[
#define USE_YYLLOC      ]AT_LOCATION_IF([(void) yylloc;])[

#if YYPURE
#  define LEX_FORMALS     YYSTYPE *yylval YYLLOC_FORMAL
#  define LEX_ARGS        yylval          YYLLOC_ARG
#  define USE_LEX_ARGS    (void) yylval;  USE_YYLLOC
#  define LEX_PRE_FORMALS   LEX_FORMALS,
#  define LEX_PRE_ARGS      LEX_ARGS,
#else
#  define LEX_FORMALS       void
#  define LEX_PRE_FORMALS
#  define LEX_ARGS
#  define LEX_PRE_ARGS
#  define USE_LEX_ARGS
#endif

static int power (int base, int exponent);
/* yyerror receives the location if:
   - %location & %pure & %glr
   - %location & %pure & %yacc & %parse-param. */
static void yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
                     ]AT_PARAM_IF([value_t *result, int *count, ])[
                     const char *s
                     );
static int yylex (LEX_FORMALS);
static int yygetc (LEX_FORMALS);
static void yyungetc (LEX_PRE_FORMALS int c);
%}

/* Bison Declarations */
%token CALC_EOF 0 "end of input"
%token <ival> NUM "number"
%type  <ival> exp

%nonassoc '=' /* comparison	       */
%left '-' '+'
%left '*' '/'
%left NEG     /* negation--unary minus */
%right '^'    /* exponentiation        */

/* Grammar follows */
%%
input:
  line
| input line         { ]AT_PARAM_IF([++*count; ++global_count;])[ }
;

line:
  '\n'
| exp '\n'           { ]AT_PARAM_IF([*result = global_result = $1;])[ }
;

exp:
  NUM                { $$ = $1;             }
| exp '=' exp
  {
    if ($1 != $3)
      fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
    $$ = $1;
  }
| exp '+' exp        { $$ = $1 + $3;        }
| exp '-' exp        { $$ = $1 - $3;        }
| exp '*' exp        { $$ = $1 * $3;        }
| exp '/' exp        { $$ = $1 / $3;        }
| '-' exp  %prec NEG { $$ = -$2;            }
| exp '^' exp        { $$ = power ($1, $3); }
| '(' exp ')'        { $$ = $2;             }
| '(' error ')'      { $$ = 0;              }
;
%%
/* The input. */
FILE *yyin;

static void
yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
         ]AT_PARAM_IF([value_t *result, int *count, ])[
         const char *s
         )
{
]AT_PARAM_IF([(void) result; (void) count; ])[
]AT_YYERROR_SEES_LOC_IF([
  fprintf (stderr, "%d.%d-%d.%d: ",
	   LOC.first_line, LOC.first_column,
	   LOC.last_line, LOC.last_column);
])[
  fprintf (stderr, "%s\n", s);
}


]AT_LOCATION_IF([
static YYLTYPE last_yylloc;
])[
static int
yygetc (LEX_FORMALS)
{
  int res = getc (yyin);
  USE_LEX_ARGS;
]AT_LOCATION_IF([
  last_yylloc = LOC;
  if (res == '\n')
    {
      LOC.last_line++;
      LOC.last_column = 1;
    }
  else
    LOC.last_column++;
])[
  return res;
}


static void
yyungetc (LEX_PRE_FORMALS int c)
{
  USE_LEX_ARGS;
]AT_LOCATION_IF([
  /* Wrong when C == `\n'. */
  LOC = last_yylloc;
])[
  ungetc (c, yyin);
}

static int
read_signed_integer (LEX_FORMALS)
{
  int c = yygetc (LEX_ARGS);
  int sign = 1;
  int n = 0;

  USE_LEX_ARGS;
  if (c == '-')
    {
      c = yygetc (LEX_ARGS);
      sign = -1;
    }

  while (isdigit (c))
    {
      n = 10 * n + (c - '0');
      c = yygetc (LEX_ARGS);
    }

  yyungetc (LEX_PRE_ARGS c);

  return sign * n;
}



/*---------------------------------------------------------------.
| Lexical analyzer returns an integer on the stack and the token |
| NUM, or the ASCII character read if not a number.  Skips all   |
| blanks and tabs, returns 0 for EOF.                            |
`---------------------------------------------------------------*/

static int
yylex (LEX_FORMALS)
{
  static int init = 1;
  int c;

  if (init)
    {
      init = 0;
]AT_LOCATION_IF([
      LOC.last_column = 1;
      LOC.last_line = 1;
])[
    }

]AT_LOCATION_IF([
  LOC.first_column = LOC.last_column;
  LOC.first_line = LOC.last_line;
])[

  /* Skip white space.  */
  while ((c = yygetc (LEX_ARGS)) == ' ' || c == '\t')
    {
]AT_LOCATION_IF([
      LOC.first_column = LOC.last_column;
      LOC.first_line = LOC.last_line;
])[
    }

  /* process numbers   */
  if (c == '.' || isdigit (c))
    {
      yyungetc (LEX_PRE_ARGS c);
      VAL.ival = read_signed_integer (LEX_ARGS);
      return NUM;
    }

  /* Return end-of-file.  */
  if (c == EOF)
    return CALC_EOF;

  /* Return single chars. */
  return c;
}

static int
power (int base, int exponent)
{
  int res = 1;
  if (exponent < 0)
    exit (1);
  for (/* Niente */; exponent; --exponent)
    res *= base;
  return res;
}

int
main (int argc, const char **argv)
{
  value_t result = 0;
  int count = 0;
  yyin = NULL;

  if (argc == 2)
    yyin = fopen (argv[1], "r");
  else
    yyin = stdin;

  if (!yyin)
    {
      perror (argv[1]);
      exit (1);
    }

#if YYDEBUG
  yydebug = 1;
#endif
  yyparse (]AT_PARAM_IF([&result, &count])[);
  assert (global_result == result);
  assert (global_count  == count);

  return 0;
}
]])
])# _AT_DATA_CALC_Y


# AT_DATA_CALC_Y([BISON-OPTIONS])
# -------------------------------
# Produce `calc.y'.
m4_define([AT_DATA_CALC_Y],
[_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
])



# _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
# ------------------------------------------------------------
# Run `calc' on INPUT and expect no STDOUT nor STDERR.
#
# If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
# NUM-STDERR-LINES is the number of expected lines on stderr.
#
# We don't count GLR's traces yet, since its traces are somewhat
# different from LALR's.
m4_define([_AT_CHECK_CALC],
[AT_DATA([[input]],
[[$2
]])
AT_PARSER_CHECK([./calc input], 0, [], [stderr])
m4_bmatch([$1],
  [%debug.*%glr\|%glr.*%debug],
     [],
  [%debug],
     [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
])])
])


# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT, [NUM-DEBUG-LINES],
#                      [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
# -------------------------------------------------------------
# Run `calc' on INPUT, and expect a `parse error' message.
#
# If INPUT starts with a slash, it is used as absolute input file name,
# otherwise as contents.
#
# If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
# is correctly output on stderr.
#
# If BISON-OPTIONS contains `%error-verbose', then make sure the
# IF-YYERROR-VERBOSE message is properly output after `parse error, '
# on STDERR.
#
# If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
# is the number of expected lines on stderr.
m4_define([_AT_CHECK_CALC_ERROR],
[m4_bmatch([$2], [^/],
           [AT_PARSER_CHECK([./calc $2], 0, [], [stderr])],
           [AT_DATA([[input]],
[[$2
]])
AT_PARSER_CHECK([./calc input], 0, [], [stderr])])
m4_bmatch([$1],
  [%debug.*%glr\|%glr.*%debug],
     [],
  [%debug],
     [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
])])

# Normalize the observed and expected error messages, depending upon the
# options.
# 1. Remove the traces from observed.
sed '/^Starting/d
/^Entering/d
/^Stack/d
/^Reading/d
/^Reducing/d
/^Shifting/d
/^state/d
/^Error:/d
/^Next/d
/^Discarding/d
/^yydestructor:/d' stderr >at-stderr
mv at-stderr stderr
# 2. Create the reference error message.
AT_DATA([[expout]],
[$4
])
# 3. If locations are not used, remove them.
AT_YYERROR_SEES_LOC_IF([],
[[sed 's/^[-0-9.]*: //' expout >at-expout
mv at-expout expout]])
# 4. If error-verbose is not used, strip the`, unexpected....' part.
m4_bmatch([$1], [%error-verbose], [],
[[sed 's/parse error, .*$/parse error/' expout >at-expout
mv at-expout expout]])
# 5. Check
AT_CHECK([cat stderr], 0, [expout])
])


# AT_CALC_PUSHDEFS($1, $2, [BISON-OPTIONS])
# -----------------------------------------
# This macro works around the impossibility to define macros
# inside macros, because issuing `[$1]' is not possible in M4 :(.
# This sucks hard, GNU M4 should really provide M5 like $$1.
m4_define([AT_CHECK_PUSHDEFS],
[m4_if([$1$2], $[1]$[2], [],
       [m4_fatal([$0: Invalid arguments: $@])])dnl
m4_pushdef([AT_PARAM_IF],
[m4_bmatch([$3], [%parse-param], [$1], [$2])])
m4_pushdef([AT_LOCATION_IF],
[m4_bmatch([$3], [%locations], [$1], [$2])])
m4_pushdef([AT_PURE_IF],
[m4_bmatch([$3], [%pure-parser], [$1], [$2])])
m4_pushdef([AT_GLR_IF],
[m4_bmatch([$3], [%glr-parser], [$1], [$2])])
m4_pushdef([AT_PURE_AND_LOC_IF],
[m4_bmatch([$3], [%locations.*%pure-parser\|%pure-parser.*%locations],
           [$1], [$2])])
m4_pushdef([AT_GLR_OR_PARAM_IF],
[m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])

# yyerror receives the location if %location & %pure & (%glr or %parse-param).
m4_pushdef([AT_YYERROR_ARG_LOC_IF],
[AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],
                    [$2])])
# yyerror cannot see the locations if !glr & pure & !param.
m4_pushdef([AT_YYERROR_SEES_LOC_IF],
[AT_LOCATION_IF([AT_GLR_IF([$1],
                           [AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
                                       [$1])])],
                [$2])])
])


# AT_CALC_POPDEFS
# ---------------
m4_define([AT_CHECK_POPDEFS],
[m4_popdef([AT_YYERROR_SEES_LOC_IF])
m4_popdef([AT_YYERROR_ARG_LOC_IF])
m4_popdef([AT_GLR_OR_PARAM_IF])
m4_popdef([AT_PURE_AND_LOC_IF])
m4_popdef([AT_GLR_IF])
m4_popdef([AT_LOCATION_IF])
m4_popdef([AT_PARAM_IF])
])



# AT_CHECK_CALC([BISON-OPTIONS])
# ------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-OPTIONS, and performs several tests over the parser.
m4_define([AT_CHECK_CALC],
[# We use integers to avoid dependencies upon the precision of doubles.
AT_SETUP([Calculator $1])

AT_CHECK_PUSHDEFS($[1], $[2], [$1])

AT_DATA_CALC_Y([$1])

# Specify the output files to avoid problems on different file systems.
AT_CHECK([bison -o calc.c calc.y],
         [0], [], [])

AT_COMPILE([calc])

# Test the priorities.
_AT_CHECK_CALC([$1],
[1 + 2 * 3 = 7
1 + 2 * -3 = -5

-1^2 = -1
(-1)^2 = 1

---1 = -1

1 - 2 - 3 = -4
1 - (2 - 3) = 2

2^2^3 = 256
(2^2)^3 = 64],
               [486])

# Some parse errors.
_AT_CHECK_CALC_ERROR([$1], [0 0], [11],
                     [1.3-1.4: parse error, unexpected "number"])
_AT_CHECK_CALC_ERROR([$1], [1//2], [15],
                     [1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
_AT_CHECK_CALC_ERROR([$1], [error], [4],
                     [1.1-1.2: parse error, unexpected $undefined, expecting "number" or '-' or '\n' or '('])
_AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3], [22],
                     [1.7-1.8: parse error, unexpected '='])
_AT_CHECK_CALC_ERROR([$1],
                     [
+1],
                     [14],
                     [2.1-2.2: parse error, unexpected '+'])
# Exercise error messages with EOF: work on an empty file.
_AT_CHECK_CALC_ERROR([$1], [/dev/null], [4],
                     [1.1-1.2: parse error, unexpected "end of input", expecting "number" or '-' or '\n' or '('])

# Exercise the error token: without it, we die at the first error,
# hence be sure i. to have several errors, ii. to test the action
# associated to `error'.
_AT_CHECK_CALC_ERROR([$1], [(1 ++ 2) + (0 0) = 1], [82],
[1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
1.15-1.16: parse error, unexpected "number"
calc: error: 0 != 1])

AT_CHECK_POPDEFS

AT_CLEANUP
])# AT_CHECK_CALC




# ------------------------ #
# Simple LALR Calculator.  #
# ------------------------ #

AT_BANNER([[Simple LALR Calculator.]])

# AT_CHECK_CALC_LALR([BISON-OPTIONS])
# -----------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-OPTIONS, and performs several tests over the parser.
m4_define([AT_CHECK_CALC_LALR],
[AT_CHECK_CALC($@)])

AT_CHECK_CALC_LALR()

AT_CHECK_CALC_LALR([%defines])
AT_CHECK_CALC_LALR([%locations])
AT_CHECK_CALC_LALR([%name-prefix="calc"])
AT_CHECK_CALC_LALR([%verbose])
AT_CHECK_CALC_LALR([%yacc])
AT_CHECK_CALC_LALR([%error-verbose])

AT_CHECK_CALC_LALR([%error-verbose %locations])

AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_LALR([%debug])
AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param "value_t *result", "result" %parse-param "int *count", "count"])


# ----------------------- #
# Simple GLR Calculator.  #
# ----------------------- #

AT_BANNER([[Simple GLR Calculator.]])

# AT_CHECK_CALC_GLR([BISON-OPTIONS])
# ----------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
m4_define([AT_CHECK_CALC_GLR],
[AT_CHECK_CALC([%glr-parser] $@)])


AT_CHECK_CALC_GLR()

AT_CHECK_CALC_GLR([%defines])
AT_CHECK_CALC_GLR([%locations])
AT_CHECK_CALC_GLR([%name-prefix="calc"])
AT_CHECK_CALC_GLR([%verbose])
AT_CHECK_CALC_GLR([%yacc])
AT_CHECK_CALC_GLR([%error-verbose])

AT_CHECK_CALC_GLR([%error-verbose %locations])

AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_GLR([%debug])
AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])

AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param "value_t *result", "result" %parse-param "int *count", "count"])