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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#if defined(_WIN32) && !defined(__STDWX_H__)
#include "boinc_win.h"
#elif defined(_WIN32) && defined(__STDWX_H__)
#include "stdwx.h"
#else
#include "config.h"
#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <cstring>
#include <string>
#include <cerrno>
#include <unistd.h>
#endif
#include "error_numbers.h"
#include "filesys.h"
#include "mfile.h"
MFILE::MFILE() {
buf = (char*)malloc(64*1024);
len = 0;
f = NULL;
}
MFILE::~MFILE() {
close();
}
int MFILE::open(const char* path, const char* mode) {
f = boinc_fopen(path, mode);
if (!f) return ERR_FOPEN;
if (!buf) buf = (char*)malloc(64*1024);
return 0;
}
// seems like Win's realloc is stupid, Make it smart.
//
static inline char* realloc_aux(char* p, size_t len) {
if (!p) {
return (char*)malloc(64*1024);
}
#ifdef _WIN32
if (_msize(p) >= (unsigned int)len) return p;
return (char*) realloc(p, len*2);
#else
return (char*) realloc(p, len);
#endif
}
#define BUFSIZE 100000
int MFILE::vprintf(const char* format, va_list ap) {
char buf2[BUFSIZE];
int n, k;
k = vsnprintf(buf2, BUFSIZE, format, ap);
if (k<=-1 || k>=BUFSIZE) {
fprintf(stderr, "ERROR: buffer too small in MFILE::vprintf()\n");
fprintf(stderr, "ERROR: format: %s\n", format);
fprintf(stderr, "ERROR: k=%d, BUFSIZE=%d\n", k, BUFSIZE);
return -1;
}
n = (int)strlen(buf2);
buf = (char*)realloc_aux(buf, len+n+1);
if (!buf) {
fprintf(stderr,
"ERROR: realloc() failed in MFILE::vprintf(); len %d n %d\n",
len, n
);
exit(1);
}
strncpy(buf+len, buf2, n);
len += n;
buf[len] = 0;
return k;
}
int MFILE::printf(const char* format, ...) {
int n;
va_list ap;
va_start(ap, format);
n = MFILE::vprintf(format, ap);
va_end(ap);
return n;
}
size_t MFILE::write(const void *ptr, size_t size, size_t nitems) {
buf = (char *)realloc_aux( buf, len+(size*nitems)+1 );
if (!buf) {
fprintf(stderr,
"ERROR: realloc() failed in MFILE::write(); len %d size %lu nitems %lu\n",
len, size, nitems
);
exit(1);
}
memcpy( buf+len, ptr, size*nitems );
len += (int)size*(int)nitems;
buf[len] = 0;
return nitems;
}
int MFILE::_putchar(char c) {
buf = (char*)realloc_aux(buf, len+1+1);
if (!buf) {
fprintf(stderr,
"ERROR: realloc() failed in MFILE::_putchar(); len %d\n", len
);
exit(1);
}
buf[len] = c;
len++;
buf[len] = 0;
return c;
}
int MFILE::puts(const char* p) {
int n = (int)strlen(p);
buf = (char*)realloc_aux(buf, len+n+1);
if (!buf) {
fprintf(stderr,
"ERROR: realloc() failed in MFILE::puts() len %d n %d\n", len, n
);
exit(1);
}
strncpy(buf+len, p, n);
len += n;
buf[len] = 0;
return n;
}
int MFILE::close() {
int retval = 0;
if (f) {
flush();
fclose(f);
f = NULL;
}
if (buf) {
free(buf);
buf = NULL;
}
return retval;
}
int MFILE::flush() {
int n, old_len = len;
n = (int)fwrite(buf, 1, len, f);
len = 0;
if (n != old_len) return ERR_FWRITE;
if (fflush(f)) return ERR_FFLUSH;
#ifndef _WIN32
if (fsync(fileno(f)) < 0) return ERR_FSYNC;
#endif
return 0;
}
long MFILE::tell() const {
return f ? ftell(f) : -1;
}
void MFILE::get_buf(char*& b, int& l) {
b = buf;
l = len;
buf = 0;
len = 0;
}
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