1*357f1050SThomas Veerman /*
2*357f1050SThomas Veerman * This file is part of flex.
3*357f1050SThomas Veerman *
4*357f1050SThomas Veerman * Redistribution and use in source and binary forms, with or without
5*357f1050SThomas Veerman * modification, are permitted provided that the following conditions
6*357f1050SThomas Veerman * are met:
7*357f1050SThomas Veerman *
8*357f1050SThomas Veerman * 1. Redistributions of source code must retain the above copyright
9*357f1050SThomas Veerman * notice, this list of conditions and the following disclaimer.
10*357f1050SThomas Veerman * 2. Redistributions in binary form must reproduce the above copyright
11*357f1050SThomas Veerman * notice, this list of conditions and the following disclaimer in the
12*357f1050SThomas Veerman * documentation and/or other materials provided with the distribution.
13*357f1050SThomas Veerman *
14*357f1050SThomas Veerman * Neither the name of the University nor the names of its contributors
15*357f1050SThomas Veerman * may be used to endorse or promote products derived from this software
16*357f1050SThomas Veerman * without specific prior written permission.
17*357f1050SThomas Veerman *
18*357f1050SThomas Veerman * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
19*357f1050SThomas Veerman * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
20*357f1050SThomas Veerman * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21*357f1050SThomas Veerman * PURPOSE.
22*357f1050SThomas Veerman */
23*357f1050SThomas Veerman
24*357f1050SThomas Veerman %{
25*357f1050SThomas Veerman /* A template scanner file to build "scanner.c".
26*357f1050SThomas Veerman Run as:
27*357f1050SThomas Veerman test-lineno-r # report flex's yylineno
28*357f1050SThomas Veerman test-lineno-r 1 # report count_newlines(stdin)
29*357f1050SThomas Veerman */
30*357f1050SThomas Veerman
31*357f1050SThomas Veerman #include <stdio.h>
32*357f1050SThomas Veerman #include <stdlib.h>
33*357f1050SThomas Veerman #include "config.h"
34*357f1050SThomas Veerman
35*357f1050SThomas Veerman %}
36*357f1050SThomas Veerman
37*357f1050SThomas Veerman %option 8bit outfile="scanner.c" prefix="test"
38*357f1050SThomas Veerman %option nounput nomain noyywrap yylineno reentrant
39*357f1050SThomas Veerman %option warn
40*357f1050SThomas Veerman
41*357f1050SThomas Veerman WORD [[:alpha:]]+
42*357f1050SThomas Veerman DIGIT [[:digit:]]
43*357f1050SThomas Veerman
44*357f1050SThomas Veerman %%
45*357f1050SThomas Veerman /* The goal here is to test the yylineno processing by:
46*357f1050SThomas Veerman - providing some rules than CAN match newlines and
47*357f1050SThomas Veerman other rules that can NOT match newlines,
48*357f1050SThomas Veerman - matching several newlines in one rule,
49*357f1050SThomas Veerman - directly modifying yylineno.
50*357f1050SThomas Veerman */
51*357f1050SThomas Veerman
52*357f1050SThomas Veerman "yylineno++" yylineno++;
53*357f1050SThomas Veerman "yylineno--" yylineno--;
54*357f1050SThomas Veerman [[:blank:]]+
55*357f1050SThomas Veerman {WORD}
56*357f1050SThomas Veerman {DIGIT}+(\n{DIGIT}+)*
57*357f1050SThomas Veerman \n
58*357f1050SThomas Veerman .
59*357f1050SThomas Veerman <<EOF>> { printf("%d\n", yylineno);
60*357f1050SThomas Veerman yyterminate();
61*357f1050SThomas Veerman }
62*357f1050SThomas Veerman
63*357f1050SThomas Veerman %%
64*357f1050SThomas Veerman
65*357f1050SThomas Veerman /* returns number of '\n' characters in input, plus one.
66*357f1050SThomas Veerman This is what flex does, essentially. */
67*357f1050SThomas Veerman
68*357f1050SThomas Veerman static int
69*357f1050SThomas Veerman count_newlines (FILE* in)
70*357f1050SThomas Veerman {
71*357f1050SThomas Veerman int n=1,c;
72*357f1050SThomas Veerman while ((c=fgetc(in)) != EOF)
73*357f1050SThomas Veerman if( c == '\n')
74*357f1050SThomas Veerman n++;
75*357f1050SThomas Veerman return n;
76*357f1050SThomas Veerman }
77*357f1050SThomas Veerman
78*357f1050SThomas Veerman int main ( int argc, char** argv );
79*357f1050SThomas Veerman
80*357f1050SThomas Veerman int
main(argc,argv)81*357f1050SThomas Veerman main (argc, argv)
82*357f1050SThomas Veerman int argc;
83*357f1050SThomas Veerman char ** argv;
84*357f1050SThomas Veerman {
85*357f1050SThomas Veerman if( argc > 1 )
86*357f1050SThomas Veerman printf("%d\n", count_newlines(stdin));
87*357f1050SThomas Veerman
88*357f1050SThomas Veerman else{
89*357f1050SThomas Veerman yyscan_t s;
90*357f1050SThomas Veerman yylex_init(&s);
91*357f1050SThomas Veerman yyset_in(stdin,s);
92*357f1050SThomas Veerman yyset_out(stdout,s);
93*357f1050SThomas Veerman yylex(s);
94*357f1050SThomas Veerman yylex_destroy(s);
95*357f1050SThomas Veerman }
96*357f1050SThomas Veerman return 0;
97*357f1050SThomas Veerman }
98