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/* mode_cat.c - cat mode module
* Copyright (C) 2000-2009 Jason Jordan <shnutils@freeshell.org>
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "mode.h"
CVSID("$Id: mode_cat.c,v 1.84 2009/03/30 06:31:20 jason Exp $")
static bool cat_main(int,char **);
static void cat_help(void);
mode_module mode_cat = {
"cat",
"shncat",
"Writes PCM WAVE data from one or more files to the terminal",
CVSIDSTR,
FALSE,
cat_main,
cat_help
};
static bool cat_header = TRUE;
static bool cat_data = TRUE;
static bool cat_padded_data = TRUE;
static bool cat_extra = TRUE;
static void cat_help()
{
st_info("Usage: %s [OPTIONS] [files]\n",st_progname());
st_info("\n");
st_info("Mode-specific options:\n");
st_info("\n");
st_info(" -c suppress extra RIFF chunks\n");
st_info(" -d suppress WAVE data\n");
st_info(" -e suppress WAVE headers\n");
st_info(" -h show this help screen\n");
st_info(" -n suppress NULL pad byte at end of odd-sized data chunks, if present\n");
st_info("\n");
}
static void parse(int argc,char **argv,int *first_arg)
{
int c;
while ((c = st_getopt(argc,argv,"cden")) != -1) {
switch (c) {
case 'c':
cat_extra = FALSE;
break;
case 'd':
cat_data = FALSE;
break;
case 'e':
cat_header = FALSE;
break;
case 'n':
cat_padded_data = FALSE;
break;
}
}
if (!cat_header && !cat_data && !cat_extra)
st_help("nothing to do if WAVE header, data and extra RIFF chunks are suppressed");
*first_arg = optind;
}
static bool cat_file(wave_info *info)
{
unsigned char *header,nullpad[BUF_SIZE];
FILE *devnull,*data_dest;
int bytes;
progress_info proginfo;
bool success;
success = FALSE;
proginfo.initialized = FALSE;
proginfo.prefix = "Catenating";
proginfo.clause = NULL;
proginfo.filename1 = info->filename;
proginfo.filedesc1 = info->m_ss;
proginfo.filename2 = NULL;
proginfo.filedesc2 = NULL;
proginfo.bytes_total = info->total_size;
prog_update(&proginfo);
SETBINARY_OUT(stdout);
if (NULL == (devnull = open_output(NULLDEVICE))) {
prog_error(&proginfo);
st_error("could not open output file: [%s]",NULLDEVICE);
}
if (!cat_header && !cat_data && !PROB_EXTRA_CHUNKS(info)) {
prog_error(&proginfo);
st_warning("input file contains no extra RIFF chunks -- nothing to do");
return FALSE;
}
if (!open_input_stream(info)) {
prog_error(&proginfo);
st_error("could not reopen input file");
}
if (NULL == (header = malloc(info->header_size * sizeof(unsigned char)))) {
prog_error(&proginfo);
st_error("could not allocate %d bytes for WAVE header",info->header_size);
}
if (read_n_bytes(info->input,header,info->header_size,NULL) != info->header_size) {
prog_error(&proginfo);
st_error("error while reading %d-byte WAVE header",info->header_size);
}
if (cat_header) {
if (!do_header_kluges(header,info)) {
prog_error(&proginfo);
st_error("could not fix WAVE header");
}
if (write_n_bytes(stdout,header,info->header_size,&proginfo) != info->header_size) {
prog_error(&proginfo);
st_error("error while writing %d-byte WAVE header",info->header_size);
}
}
else {
proginfo.bytes_written += info->header_size;
prog_update(&proginfo);
}
if (cat_data)
data_dest = stdout;
else
data_dest = devnull;
if (transfer_n_bytes(info->input,data_dest,info->data_size,&proginfo) != info->data_size) {
prog_error(&proginfo);
st_error("error while transferring %lu bytes of data",info->data_size);
}
if (PROB_ODD_SIZED_DATA(info)) {
nullpad[0] = 1;
bytes = read_n_bytes(info->input,nullpad,1,NULL);
if ((1 != bytes) && (0 != bytes)) {
prog_error(&proginfo);
st_error("error while reading possible NULL pad byte");
}
if ((0 == bytes) || ((1 == bytes) && nullpad[0])) {
st_debug1("input file does not contain NULL pad byte for odd-sized data chunk per RIFF specs");
}
if (1 == bytes) {
if ((0 == nullpad[0]) && cat_padded_data) {
if (write_n_bytes(data_dest,nullpad,1,&proginfo) != 1) {
prog_error(&proginfo);
st_error("error while writing NULL pad byte");
}
}
if (nullpad[0] && cat_extra) {
if (write_n_bytes(stdout,nullpad,1,&proginfo) != 1) {
prog_error(&proginfo);
st_error("error while writing initial extra byte");
}
}
}
}
if (cat_extra && PROB_EXTRA_CHUNKS(info)) {
if (info->extra_riff_size != transfer_n_bytes(info->input,stdout,info->extra_riff_size,&proginfo)) {
prog_error(&proginfo);
st_error("error while transferring %lu extra bytes",info->extra_riff_size);
}
}
success = TRUE;
prog_success(&proginfo);
fclose(devnull);
st_free(header);
close_input_stream(info);
return success;
}
static bool process_file(char *filename)
{
wave_info *info;
bool success;
if (NULL == (info = new_wave_info(filename)))
return FALSE;
success = cat_file(info);
st_free(info);
return success;
}
static bool process(int argc,char **argv,int start)
{
char *filename;
bool success;
success = TRUE;
input_init(start,argc,argv);
while ((filename = input_get_filename())) {
success = (process_file(filename) && success);
}
return success;
}
static bool cat_main(int argc,char **argv)
{
int first_arg;
parse(argc,argv,&first_arg);
return process(argc,argv,first_arg);
}
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