-# -*- Autoconf -*-
-
-cat <<EOF
-
-Simple Calculator.
-
-EOF
-
-
-## ---------------------------------------------------- ##
-## Compile the grammar described in the documentation. ##
-## ---------------------------------------------------- ##
-
-
-# ------------------------- #
-# Helping Autotest macros. #
-# ------------------------- #
-
-
-# _AT_DATA_CALC_Y($1, $2, $3, [CPP-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.
-AT_DEFINE([_AT_DATA_CALC_Y],
-[ifelse([$1$2$3],
- $[1]$[2]$[3], [],
- [errprint([$0: Invalid arguments: $@
-])m4exit(1)])dnl
-AT_DATA([calc.y],
-[[/* Infix notation calculator--calc */
-
-%{
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-]$4[
-
-static int power (int base, int exponent);
-static void yyerror (const char *s);
-static int yylex (void);
-extern void perror (const char *s);
-%}
-
-/* BISON Declarations */
-%token NUM
-
-%nonassoc '=' /* comparison */
-%left '-' '+'
-%left '*' '/'
-%left NEG /* negation--unary minus */
-%right '^' /* exponentiation */
-
-/* Grammar follows */
-%%
-input:
- /* empty string */
-| input line
-;
-
-line:
- '\n'
-| exp '\n'
-;
-
-exp:
- NUM { $$ = $1; }
-| exp '=' exp
- {
- if ($1 != $3)
- printf ("calc: error: %d != %d\n", $1, $3);
- $$ = $1 == $3;
- }
-| 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; }
-;
-%%
-/* The input. */
-FILE *yyin;
-
-static void
-yyerror (const char *s)
-{
-#ifdef YYLSP_NEEDED
- fprintf (stderr, "%d.%d:%d.%d: ",
- yylloc.first_line, yylloc.first_column,
- yylloc.last_line, yylloc.last_column);
-#endif
- fprintf (stderr, "%s\n", s);
-}
-
-static int
-yygetc ()
-{
- int res = getc (yyin);
-#ifdef YYLSP_NEEDED
- if (res == '\n')
- {
- yylloc.last_line++;
- yylloc.last_column = 0;
- }
- else
- yylloc.last_column++;
-#endif
- return res;
-}
-
-
-static void
-yyungetc (int c)
-{
-#ifdef YYLSP_NEEDED
- /* Wrong when C == `\n'. */
- yylloc.last_column--;
-#endif
- ungetc (c, yyin);
-}
-
-static int
-read_signed_integer (void)
-{
- int c = yygetc ();
- int sign = 1;
- int n = 0;
-
- if (c == '-')
- {
- c = yygetc ();
- sign = -1;
- }
-
- while (isdigit (c))
- {
- n = 10 * n + (c - '0');
- c = yygetc ();
- }
-
- yyungetc (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 (void)
-{
- int c;
-
-#ifdef YYLSP_NEEDED
- yylloc.first_column = yylloc.last_column;
- yylloc.first_line = yylloc.last_line;
-#endif
-
- /* Skip white space. */
- while ((c = yygetc ()) == ' ' || c == '\t')
- {
-#ifdef YYLSP_NEEDED
- yylloc.first_column = yylloc.last_column;
- yylloc.first_line = yylloc.last_line;
-#endif
- }
-
- /* process numbers */
- if (c == '.' || isdigit (c))
- {
- yyungetc (c);
- yylval = read_signed_integer ();
- return NUM;
- }
-
- /* Return end-of-file. */
- if (c == EOF)
- return 0;
-
- /* 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 argn, const char **argv)
-{
- if (argn == 2)
- yyin = fopen (argv[1], "r");
- else
- yyin = stdin;
-
- if (!stdin)
- {
- perror (argv[1]);
- exit (1);
- }
-
-#if YYDEBUG
- yydebug = 1;
-#endif
-#ifdef YYLSP_NEEDED
- yylloc.last_column = 0;
- yylloc.last_line = 1;
-#endif
- yyparse ();
- return 0;
-}
-]])
-])# _AT_DATA_CALC_Y
-
-
-# AT_DATA_CALC_Y([BISON-OPTIONS])
-# -------------------------------
-# Produce `calc.y'.
-AT_DEFINE([AT_DATA_CALC_Y],
-[_AT_DATA_CALC_Y($[1], $[2], $[3],
- [ifelse(regexp([$1], [--yyerror-verbose]),
- [-1], [],
- [[#define YYERROR_VERBOSE]])])])
-
-
-
-# _AT_CHECK_CALC(BISON-OPTIONS, INPUT)
-# ------------------------------------
-# Run `calc' on INPUT and expect no STDOUT nor STDERR.
-# If `--debug' is passed to bison, discard all the debugging traces
-# preserving only the `parse errors'. Note that since there should be
-# none, the `grep' will fail with exit status 1.
-AT_DEFINE([_AT_CHECK_CALC],
-[ifelse(regexp([$1], [--debug]),
- [-1],
- [AT_CHECK([echo "$2" | calc],
- [0], [], [])],
- [AT_CHECK([echo "$2" | calc 2>&1 >/dev/null | grep 'parse error' >&2],
- [1], [], [])])])
-
-
-# _AT_CHECK_CALC_ERROR(BISON-OPTIONS, INPUT,
-# [ERROR-LOCATION], [IF-YYERROR-VERBOSE])
-# ------------------------------------------------------------
-# Run `calc' on INPUT, and expect STDERR.
-AT_DEFINE([_AT_CHECK_CALC_ERROR],
-[AT_CHECK([echo "$2" | calc 2>&1 >/dev/null | grep 'parse error' >&2], 0,
- [],
-[ifelse(regexp([$1], [--location]),
- [-1], [], [$3: ])[]dnl
-parse error[]dnl
-ifelse(regexp([$1], [--yyerror-verbose]),
- [-1], [], [$4])[]dnl
-
-])])
-
-
-# AT_CHECK_CALC([BISON-OPTIONS], [PARSER-EXPECTED-STDERR])
-# --------------------------------------------------------
-# Start a testing chunk which compiles `calc' grammar with
-# BISON-OPTIONS, and performs several tests over the parser.
-AT_DEFINE([AT_CHECK_CALC],
-[# We use integers to avoid dependencies upon the precision of doubles.
-AT_SETUP([Calculator $1])
-
-AT_DATA_CALC_Y([$1])
-
-# Specify the output files to avoid problems on different file systems.
-AT_CHECK([bison calc.y -o calc.c patsubst([$1], [--yyerror-verbose])],
- [0], [], [])
-AT_CHECK([$CC $CFLAGS calc.c -o calc], 0, [], [])
-
-# 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], [$2])
-
-# Some parse errors.
-_AT_CHECK_CALC_ERROR([$1], [+1],
- [1.0:1.1],
- [, unexpected `'+''])
-_AT_CHECK_CALC_ERROR([$1], [1//2],
- [1.2:1.3],
- [, unexpected `'/'', expecting `NUM' or `'-'' or `'(''])
-_AT_CHECK_CALC_ERROR([$1], [error],
- [1.0:1.1],
- [, unexpected `$undefined.'])
-_AT_CHECK_CALC_ERROR([$1], [1 = 2 = 3],
- [1.6:1.7],
- [, unexpected `'=''])
-_AT_CHECK_CALC_ERROR([$1],
- [
-+1],
- [2.0:2.1],
- [, unexpected `'+''])
-
-AT_CLEANUP(calc calc.c calc.h calc.output)
-])# AT_CHECK_CALC
-
-
-
-
-# ------------------ #
-# Test the parsers. #
-# ------------------ #
-
-AT_CHECK_CALC()
-# This one is very suspicious. The test fails, but it might be normal.
-AT_CHECK_CALC([--raw])
-
-AT_CHECK_CALC([--defines])
-AT_CHECK_CALC([--locations])
-AT_CHECK_CALC([--name-prefix=calc])
-AT_CHECK_CALC([--verbose])
-AT_CHECK_CALC([--yacc])
-AT_CHECK_CALC([--yyerror-verbose])
-
-AT_CHECK_CALC([--locations --yyerror-verbose])
-
-AT_CHECK_CALC([--defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
-
-AT_CHECK_CALC([--debug])
-AT_CHECK_CALC([--debug --defines --locations --name-prefix=calc --verbose --yacc --yyerror-verbose])
projects / bison.git / commitdiff
