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/*
* osdep.c
* - portability routines
*/
/*
* This file is part of secnet.
* See README for full list of copyright holders.
*
* secnet 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.
*
* secnet 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
* version 3 along with secnet; if not, see
* https://www.gnu.org/licenses/gpl.html.
*/
#include "config.h"
#include "osdep.h"
#include "secnet.h"
#include "util.h"
#ifndef HAVE_FMEMOPEN
# ifdef HAVE_FUNOPEN
struct fmemopen_state {
const char *bufp;
size_t remain;
};
static int fmemopen_readfn(void *sst, char *out, int sz)
{
struct fmemopen_state *st=sst;
assert(sz>=0);
int now=MIN((size_t)sz,st->remain);
memcpy(out,st->bufp,now);
st->remain-=now;
return now;
}
static int fmemopen_close(void *sst) { free(sst); return 0; }
FILE *fmemopen(void *buf, size_t size, const char *mode)
{
/* this is just a fake plastic imitation */
assert(!strcmp(mode,"r"));
struct fmemopen_state *st;
NEW(st);
st->bufp=buf;
st->remain=size;
FILE *f=funopen(st,fmemopen_readfn,0,0,fmemopen_close);
if (!f) free(st);
return f;
}
# else /* HAVE_FUNOPEN */
# error no fmemopen, no funopen, cannot proceed
# endif
#endif /* HAVE_FMEMOPEN */
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