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/* Test of filtering of data through a subprocess.
Copyright (C) 2009-2018 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 2009.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "pipe-filter.h"
#include "binary-io.h"
#include "c-ctype.h"
#include "read-file.h"
#include "macros.h"
/* Pipe a text file through 'LC_ALL=C tr "[a-z]" "[A-Z]"', or equivalently,
'tr "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ"', which
converts ASCII characters from lower case to upper case. */
struct locals
{
const char *input;
size_t size;
size_t nwritten;
size_t nread;
char buf[19];
};
static const void *
prepare_write (size_t *num_bytes_p, void *private_data)
{
struct locals *l = (struct locals *) private_data;
if (l->nwritten < l->size)
{
*num_bytes_p = l->size - l->nwritten;
return l->input + l->nwritten;
}
else
return NULL;
}
static void
done_write (void *data_written, size_t num_bytes_written, void *private_data)
{
struct locals *l = (struct locals *) private_data;
l->nwritten += num_bytes_written;
}
static void *
prepare_read (size_t *num_bytes_p, void *private_data)
{
struct locals *l = (struct locals *) private_data;
*num_bytes_p = sizeof (l->buf);
return l->buf;
}
static void
done_read (void *data_read, size_t num_bytes_read, void *private_data)
{
struct locals *l = (struct locals *) private_data;
const char *p = l->input + l->nread;
const char *q = (const char *) data_read;
size_t i;
for (i = 0; i < num_bytes_read; i++, q++)
{
/* Handle conversion NL -> CRLF possibly done by the child process. */
if (!(O_BINARY && *q == '\r'))
{
char orig = *p;
char expected = c_toupper (orig);
ASSERT (*q == expected);
p++;
}
}
l->nread = p - l->input;
}
int
main (int argc, char *argv[])
{
const char *tr_program;
const char *input_filename;
size_t input_size;
char *input;
ASSERT (argc == 3);
tr_program = argv[1];
/* Read some text from a file. */
input_filename = argv[2];
input = read_binary_file (input_filename, &input_size);
ASSERT (input != NULL);
/* Convert it to uppercase, line by line. */
{
const char *argv[4];
struct locals l;
int result;
l.input = input;
l.size = input_size;
l.nwritten = 0;
l.nread = 0;
argv[0] = tr_program;
argv[1] = "abcdefghijklmnopqrstuvwxyz";
argv[2] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
argv[3] = NULL;
result = pipe_filter_ii_execute ("tr", tr_program, argv, false, true,
prepare_write, done_write,
prepare_read, done_read,
&l);
ASSERT (result == 0);
ASSERT (l.nwritten == input_size);
ASSERT (l.nread == input_size);
}
return 0;
}
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