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/*! \file pseudotalloc.c
* overly simplistic talloc replacement for deeply embedded
* microcontrollers. Obviously this has none of the properties of real
* talloc, it is particualrly not hierarchical at all.
*
* (C) 2017 by Harald Welte <laforge@gnumonks.org>
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "talloc.h"
#include <string.h>
#include <stdio.h>
void *_talloc_zero(const void *ctx, size_t size, const char *name)
{
void *p = pseudotalloc_malloc(size);
if (!p)
return NULL;
memset(p, 0, size);
return p;
}
int _talloc_free(void *ptr, const char *location)
{
pseudotalloc_free(ptr);
return 0;
}
void *talloc_named_const(const void *context, size_t size, const char *name)
{
return pseudotalloc_malloc(size);
}
void talloc_set_name_const(const void *ptr, const char *name)
{
}
char *talloc_strdup(const void *context, const char *p)
{
char *ptr;
size_t len;
if (!p)
return NULL;
len = strlen(p);
ptr = talloc_size(context, len+1);
if (!ptr)
return NULL;
memcpy(ptr, p, len+1);
return ptr;
}
void *talloc_pool(const void *context, size_t size)
{
return (void *) context;
}
void *_talloc_array(const void *ctx, size_t el_size, unsigned count, const char *name)
{
return talloc_size(ctx, el_size * count);
}
void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const char *name)
{
return talloc_zero_size(ctx, el_size * count);
}
char *talloc_asprintf(const void *ctx, const char *fmt, ...)
{
char *buf;
size_t len = 128;
va_list args;
va_start(args, fmt);
buf = talloc_size(ctx, len);
if (len < vsnprintf(buf, len, fmt, args))
strcpy(&buf[len-6], "[...]");
va_end(args);
return buf;
}
void *talloc_steal(const void *new_ctx, const void *obj)
{
/* as we don't do hierarchical allocations, this is simply a NOP */
return (void *)obj;
}
char *talloc_vasprintf(const void *t, const char *fmt, va_list ap)
{
/* we have a hard-coded maximum string length of 128 bytes in this pseudo implementation */
char *buf = pseudotalloc_malloc(128);
if (!buf)
return NULL;
vsnprintf(buf, 128, fmt, ap);
return buf;
}
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