1 /* Test of filtering of data through a subprocess.
2 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
3 Written by Bruno Haible <haible@clisp.cons.org>, 2009.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "pipe-filter.h"
22 #include "binary-io.h"
24 #include "read-file.h"
29 /* Pipe a text file through 'tr a-z A-Z', which converts ASCII characters from
30 lower case to upper case. */
40 prepare_read (size_t *num_bytes_p, void *private_data)
42 struct locals *l = (struct locals *) private_data;
43 *num_bytes_p = sizeof (l->buf);
48 done_read (void *data_read, size_t num_bytes_read, void *private_data)
50 struct locals *l = (struct locals *) private_data;
51 const char *p = l->input + l->nread;
52 const char *q = (const char *) data_read;
55 for (i = 0; i < num_bytes_read; i++, q++)
57 /* Handle conversion NL -> CRLF possibly done by the child process. */
58 if (!(O_BINARY && *q == '\r'))
61 char expected = c_toupper (orig);
62 ASSERT (*q == expected);
66 l->nread = p - l->input;
70 main (int argc, char *argv[])
72 const char *tr_program;
73 const char *input_filename;
77 set_program_name (argv[0]);
83 /* Read some text from a file. */
84 input_filename = argv[2];
85 input = read_binary_file (input_filename, &input_size);
86 ASSERT (input != NULL);
88 /* Convert it to uppercase, line by line. */
92 struct pipe_filter_gi *f;
103 f = pipe_filter_gi_create ("tr", tr_program, argv, false, true,
104 prepare_read, done_read, &l);
106 result = pipe_filter_gi_write (f, input, input_size);
107 ASSERT (result == 0);
108 result = pipe_filter_gi_close (f);
109 ASSERT (result == 0);
110 ASSERT (l.nread == input_size);