--- procedure SEMI
--
-- Count all semi-colons in the input file and send this
-- count to the output file.
with TEXT_IO; use TEXT_IO;
procedure SEMI -- Count all semicolons.
is
package INT_IO is new INTEGER_IO (NATURAL);
CHAR: CHARACTER;
LINE: STRING (1 .. 250);
LAST: NATURAL;
COUNTER: NATURAL := 0;
QUOTE, DQUOTE, MINUS : BOOLEAN;
begin
while not END_OF_FILE loop
GET_LINE (LINE, LAST);
if LAST >= LINE'FIRST then
QUOTE := FALSE;
DQUOTE := FALSE;
MINUS := FALSE;
for I in 1 .. LAST loop
CHAR := LINE (I);
case CHAR is
when '-' =>
if not DQUOTE and not QUOTE then
if MINUS then
-- double MINUS, i.e., comment; exit loop
exit;
else
-- We've seen a minus.
MINUS := TRUE;
end if;
end if;
when '"' =>
if not QUOTE then
-- not within a quote
DQUOTE := not DQUOTE;
end if;
MINUS := FALSE;
when ''' =>
if not DQUOTE then
-- not within a double quote
QUOTE := not QUOTE;
end if;
MINUS := FALSE;
when ';' =>
if not DQUOTE and not QUOTE then
-- not within quotes of any kind, count it.
COUNTER := COUNTER + 1;
end if;
MINUS := FALSE;
when OTHERS =>
MINUS := FALSE;
end case;
end loop;
end if;
end loop;
PUT ("There are");
INT_IO.PUT (COUNTER, WIDTH => 10);
PUT_LINE (" semi-colons in the input stream.");
end SEMI;
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