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63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
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calloc.c - allocate memory.
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Copyright (C) 2015, Philipp Klaus Krause, pkk@spth.de
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This library is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this library; see the file COPYING. If not, write to the
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Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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As a special exception, if you link this library with other files,
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some of which are compiled with SDCC, to produce an executable,
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this library does not by itself cause the resulting executable to
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be covered by the GNU General Public License. This exception does
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not however invalidate any other reasons why the executable file
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might be covered by the GNU General Public License.
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-------------------------------------------------------------------------*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#if defined(__SDCC_mcs51) || defined(__SDCC_ds390) || defined(__SDCC_ds400)
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#define HEAPSPACE __xdata
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#elif defined(__SDCC_pdk13) || defined(__SDCC_pdk14) || defined(__SDCC_pdk15)
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#define HEAPSPACE __near
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#else
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#define HEAPSPACE
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#endif
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#if defined(__SDCC_mcs51) || defined(__SDCC_ds390) || defined(__SDCC_ds400)
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void HEAPSPACE *calloc (size_t nmemb, size_t size)
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#else
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void *calloc (size_t nmemb, size_t size)
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#endif
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{
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void HEAPSPACE *ptr;
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unsigned long msize = (unsigned long)nmemb * (unsigned long)size;
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_Static_assert(sizeof(unsigned long) >= sizeof(size_t) * 2,
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"size_t too large wrt. unsigned long for overflow check");
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if (msize > SIZE_MAX)
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return(0);
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if (ptr = malloc(msize))
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memset(ptr, 0, msize);
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return(ptr);
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}
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