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/*$Id: io_contr.cc,v 26.137 2010/04/10 02:37:33 al Exp $ -*- C++ -*-
* Copyright (C) 2001 Albert Davis
* Author: Albert Davis <[email protected]>
*
* This file is part of "Gnucap", the Gnu Circuit Analysis Package
*
* 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, 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.
*------------------------------------------------------------------
* Sets up output direction and format for most commands
* updates pointers into the string
* outreset starts it all over
*/
//testing=script,sparse 2006.07.17
#include "io_.h"
#include "ap.h"
/*--------------------------------------------------------------------------*/
void initio(OMSTREAM&);
//static void decipher(char*);
void outreset(void);
OMSTREAM* outset(CS&,OMSTREAM*);
static FILE* file_open(CS&,const char*,const char*,FILE*);
/*--------------------------------------------------------------------------*/
static FILE* fn; /* write file */
static FILE* to_pipe;
/*--------------------------------------------------------------------------*/
/* initio: initialize file encryption, etc
*/
void initio(OMSTREAM& Where)
{
const char* tag = "''''";
if (Where.cipher()) { /* if writing an encrypted file, */
untested();
Where << tag << '\n'; /* mark it as encrypted */
}else{
}
#if 0
if (Whence) {
char buf[BUFLEN];
if (!fgets(buf, BUFLEN, Whence)) /* if the first line deciphers to */
return; /* the cipher tag, it is encrypted */
IO::incipher = true; /* otherwise, */
decipher(buf); /* rewind and read normally */
if (strcmp(buf,tag) != 0) { /* mismatch */
IO::incipher = false;
fseek(Whence,0L,SEEK_SET);
}
}
#endif
}
/*--------------------------------------------------------------------------*/
#if 0
/* decipher: un-encrypt a line of text in place
*/
void decipher(char *buf)
{
untested();
if (IO::incipher) {
for ( ; isprint(buf[1]); buf++ ) {
int fixed = static_cast<int>(buf[1]) - static_cast<int>(buf[0]);
while (!isascii(fixed) || !isprint(fixed))
fixed += (0x7f-0x20);
buf[0] = static_cast<char>(fixed);
}
buf[0] = '\0';
}else{
}
}
#endif
/*--------------------------------------------------------------------------*/
/* outreset: close files and set i/o flags to standard values
*/
void outreset(void)
{
if (to_pipe) {
untested();
pclose(to_pipe);
to_pipe = NULL;
}else{
}
xclose(&fn);
IO::formaat = 0;
IO::incipher = false;
IO::mstdout.reset();
}
/*--------------------------------------------------------------------------*/
/* outset: set up i/o for a command
* return whether or not it did anything
*/
OMSTREAM* outset(CS& cmd, OMSTREAM* out)
{
bool echo = false;
for (;;) {
if (cmd.umatch("basic ")) {
IO::formaat = ftos_EXP;
(*out).setformat(ftos_EXP);
}else if (cmd.umatch("cipher ")) {untested();
(*out).setcipher().setpack();
}else if (cmd.umatch("pack ")) {itested();
(*out).setpack();
}else if (cmd.umatch("quiet ")) {itested();
echo = false;
(*out).detach(IO::mstdout);
}else if (cmd.umatch("echo ") || cmd.umatch("list ")) {itested();
echo = true;
(*out).attach(IO::mstdout);
}else if (cmd.umatch("save ")) {itested();
fn = file_open(cmd,"","w",fn);
(*out).attach(fn);
}else if (cmd.umatch("\\|")) {untested();
// open a pipe
std::string command;
cmd >> command;
to_pipe = popen(command.c_str(), "w");
assert(to_pipe);
(*out).attach(to_pipe);
IO::formaat = ftos_EXP;
(*out).setformat(ftos_EXP);
if (!echo) {untested();
(*out).detach(IO::mstdout);
}else{untested();
}
}else if (cmd.umatch(">")) {itested();
// open a file for write or append
const char *rwaflag;
rwaflag = (cmd.umatch(">")) ? "a" : "w";
fn = file_open(cmd,"",rwaflag,fn);
(*out).attach(fn);
IO::formaat = ftos_EXP;
(*out).setformat(ftos_EXP);
if (!echo) {itested();
(*out).detach(IO::mstdout);
}else{untested();
}
}else{
break;
}
}
return out;
}
/*--------------------------------------------------------------------------*/
/* file_open: a different interface for xopen
*/
static FILE *file_open(
CS& cmd,
const char *ext,
const char *rwaflag,
FILE *fileptr)
{itested();
xclose(&fileptr);
fileptr = xopen(cmd,ext,rwaflag);
if (!fileptr) {itested();
throw Exception_File_Open("");
}else{itested();
}
return fileptr;
}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/
// vim:ts=8:sw=2:noet:
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