1 /* Test of filtering of data through a subprocess.
2 Copyright (C) 2009-2013 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 'LC_ALL=C tr "[a-z]" "[A-Z]"', or equivalently,
30 'tr "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ"', which
31 converts ASCII characters from lower case to upper case. */
43 prepare_write (size_t *num_bytes_p, void *private_data)
45 struct locals *l = (struct locals *) private_data;
46 if (l->nwritten < l->size)
48 *num_bytes_p = l->size - l->nwritten;
49 return l->input + l->nwritten;
56 done_write (void *data_written, size_t num_bytes_written, void *private_data)
58 struct locals *l = (struct locals *) private_data;
59 l->nwritten += num_bytes_written;
63 prepare_read (size_t *num_bytes_p, void *private_data)
65 struct locals *l = (struct locals *) private_data;
66 *num_bytes_p = sizeof (l->buf);
71 done_read (void *data_read, size_t num_bytes_read, void *private_data)
73 struct locals *l = (struct locals *) private_data;
74 const char *p = l->input + l->nread;
75 const char *q = (const char *) data_read;
78 for (i = 0; i < num_bytes_read; i++, q++)
80 /* Handle conversion NL -> CRLF possibly done by the child process. */
81 if (!(O_BINARY && *q == '\r'))
84 char expected = c_toupper (orig);
85 ASSERT (*q == expected);
89 l->nread = p - l->input;
93 main (int argc, char *argv[])
95 const char *tr_program;
96 const char *input_filename;
100 set_program_name (argv[0]);
104 tr_program = argv[1];
106 /* Read some text from a file. */
107 input_filename = argv[2];
108 input = read_binary_file (input_filename, &input_size);
109 ASSERT (input != NULL);
111 /* Convert it to uppercase, line by line. */
122 argv[0] = tr_program;
123 argv[1] = "abcdefghijklmnopqrstuvwxyz";
124 argv[2] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
127 result = pipe_filter_ii_execute ("tr", tr_program, argv, false, true,
128 prepare_write, done_write,
129 prepare_read, done_read,
131 ASSERT (result == 0);
132 ASSERT (l.nwritten == input_size);
133 ASSERT (l.nread == input_size);