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/*C* $Id: file.cc,v 1.4 1997/09/26 17:57:57 james Exp $
*
* Hatman - The Game of Kings
* Copyright (C) 1997 James Pharaoh & Timothy Fisken
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*C*/
#include "File.h"
#include "debug.h"
#include "util.h"
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <assert.h>
//--------------------------------------------------------------------------------------------------------------------------------
File::File()
{
fp = NULL;
}
File::File(const char* filename, const char* mode)
{
assert(filename != NULL); assert(mode != NULL);
fp = NULL;
open(filename, mode);
}
File::File(FILE* _fp)
{
assert(_fp != NULL);
fp = _fp;
fpWantsClosing = true;
}
#ifndef NDEBUG
File::File(File& object)
: Object(object)
{
fatal("You did a File = File, didn't you? Well I can't allow it.\nIt's too silly, I am afraid.\n");
}
#endif
File::~File()
{
if(fpWantsClosing) close();
}
FILE* File::open(const char* filename, const char* mode)
{
assert(this != NULL); assert(filename != NULL); assert(mode != NULL);
close();
VPRINTF("<file> opening \"%s\" in mode \"%s\"\n", filename, mode);
fp = fopen(filename, mode);
if(!fp) setError("%s", errnoStr());
return fp;
}
int File::close()
{
assert(this != NULL);
if(!fp) return 0;
int ret = fclose(fp);
fp = NULL;
return ret;
}
int File::scanf(const char* format, ...)
{
assert(this != NULL); assert(format != NULL);
va_list ap;
va_start(ap, format);
int ret = vfscanf(fp, format, ap);
va_end(ap);
return ret;
}
bool File::read(void* data, size_t size)
{
if(fread(data, size, 1, fp) != 1)
{
if(errno) setError("%s", errnoStr());
else setError("end of file");
return false;
}
return true;
}
bool File::write(const void* data, size_t size)
{
if(fwrite(data, size, 1, fp) != 1)
{
setError("%s", errnoStr());
return false;
}
return true;
}
//--------------------------------------------------------------------------------------------------------------------------------
File fStdOut(stdout);
File fStdIn(stdin);
File fStdErr(stderr);
//--------------------------------------------------------------------------------------------------------------------------------
Pipe::Pipe()
: File()
{
}
Pipe::Pipe(const char* filename, const char* mode)
{
assert(filename != NULL); assert(mode != NULL);
fp = NULL;
open(filename, mode);
}
FILE* Pipe::open(const char* filename, const char* mode)
{
assert(this != NULL); assert(filename != NULL); assert(mode != NULL);
close();
VPRINTF("<file> opening \"%s\" as pipe in mode \"%s\"\n", filename, mode);
fp = popen(filename, mode);
if(!fp) setError(errnoStr());
return fp;
}
int Pipe::close()
{
assert(this != NULL);
if(!fp) return 0;
int ret = pclose(fp);
fp = NULL;
return ret;
}
//--------------------------------------------------------------------------------------------------------------------------------
GzipPipe::GzipPipe(const char* filename, const char* mode)
{
assert(filename != NULL); assert(mode != NULL);
fp = NULL;
open(filename, mode);
}
FILE* GzipPipe::open(const char* filename, const char* mode)
{
assert(this != NULL); assert(filename != NULL); assert(mode != NULL);
if(!strcmp(mode, "r"))
{
char* s;
asprintf(&s, "gzip -dc %s", filename);
Pipe::open(s, "r"); // assigns fp
free(s);
return fp;
}
else if(!strcmp(mode, "w"))
{
char* s;
asprintf(&s, "/bin/sh -c \"gzip - > %s\"", filename);
Pipe::open(s, "w"); // assigns fp
free(s);
return fp;
}
setError("unknown file mode: \"%s\"", mode);
return NULL;
}
//--------------------------------------------------------------------------------------------------------------------------------
bool save(const char* filename, Object* object, bool (Object::*write)(File& f))
{
File* f = gzFilename(filename)? new GzipPipe(filename, "w") : new File(filename, "w");
if(!f->ready()) { setError("loading %s: %s", filename, errStr); return false; }
if(!(object->*write)(*f)) { delete f; setError("saving %s: %s", filename, errStr); return false; }
delete f;
return true;
}
Object* load(const char* filename, Object* create(File& f))
{
Object* o = NULL;
File* f = gzFilename(filename)? new GzipPipe(filename, "r") : new File(filename, "r");
if(!f->ready()) { setError("loading %s: %s", filename, errStr); return NULL; }
if((o = create(*f)) == NULL) { delete f; setError("loading %s: %s", filename, errStr); return NULL; }
return o;
}
//--------------------------------------------------------------------------------------------------------------------------------
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