1 /* Test of filtering of data through a subprocess.
2 Copyright (C) 2009 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"
25 #include "binary-io.h"
27 #include "read-file.h"
30 #define ASSERT(expr) \
35 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
43 /* Pipe a text file through 'tr a-z A-Z', which converts ASCII characters from
44 lower case to upper case. */
56 prepare_write (size_t *num_bytes_p, void *private_data)
58 struct locals *l = (struct locals *) private_data;
59 if (l->nwritten < l->size)
61 *num_bytes_p = l->size - l->nwritten;
62 return l->input + l->nwritten;
69 done_write (void *data_written, size_t num_bytes_written, void *private_data)
71 struct locals *l = (struct locals *) private_data;
72 l->nwritten += num_bytes_written;
76 prepare_read (size_t *num_bytes_p, void *private_data)
78 struct locals *l = (struct locals *) private_data;
79 *num_bytes_p = sizeof (l->buf);
84 done_read (void *data_read, size_t num_bytes_read, void *private_data)
86 struct locals *l = (struct locals *) private_data;
87 const char *p = l->input + l->nread;
88 const char *q = (const char *) data_read;
91 for (i = 0; i < num_bytes_read; i++, q++)
93 /* Handle conversion NL -> CRLF possibly done by the child process. */
94 if (!(O_BINARY && *q == '\r'))
97 char expected = c_toupper (orig);
98 ASSERT (*q == expected);
102 l->nread = p - l->input;
106 main (int argc, char *argv[])
108 const char *tr_program;
109 const char *input_filename;
113 set_program_name (argv[0]);
117 tr_program = argv[1];
119 /* Read some text from a file. */
120 input_filename = argv[2];
121 input = read_binary_file (input_filename, &input_size);
122 ASSERT (input != NULL);
124 /* Convert it to uppercase, line by line. */
135 argv[0] = tr_program;
140 result = pipe_filter_ii_execute ("tr", tr_program, argv, false, true,
141 prepare_write, done_write,
142 prepare_read, done_read,
144 ASSERT (result == 0);
145 ASSERT (l.nwritten == input_size);
146 ASSERT (l.nread == input_size);