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/* stmem.c - memory allocation routines. */
/* XLISP-STAT 2.1 Copyright (c) 1990, by Luke Tierney */
/* Additions to Xlisp 2.1, Copyright (c) 1989 by David Michael Betz */
/* You may give out copies of this software; for conditions see the */
/* file COPYING included with this distribution. */
#include "xlisp.h"
#include "xlstat.h"
#ifndef ANSI
extern ALLOCTYPE *calloc(), *realloc();
#endif
/**************************************************************************/
/** **/
/** Error Message and Memory Allocation Functions **/
/** **/
/**************************************************************************/
ALLOCTYPE *StCalloc P2C(int, n, int, m)
{
ALLOCTYPE *val;
if ((val = calloc(n, m)) == NULL) {
gc();
if ((val = calloc(n, m)) == NULL)
xlfail("allocation failed");
}
return(val);
}
VOID StFree P1C(ALLOCTYPE *, p)
{
if (p != NULL) free(p);
}
/**************************************************************************/
/** **/
/** Reallocatable Data Pointer Package **/
/** **/
/** (This is needed on the Mac because the realloc function does not **/
/** work and also to help reduce heap fragmentation.) **/
/** **/
/**************************************************************************/
#ifdef MACINTOSH
typedef ALLOCTYPE **StReallocData;
#else
typedef struct{
int size;
ALLOCTYPE *data;
} realloc_data, *StReallocData;
#endif /* MACINTOSH */
ALLOCTYPE *StRCalloc P2C(int, n, int, m)
{
#ifdef MACINTOSH
Handle h;
long size;
char *p;
size = ((long) n) * ((long) m);
if ((h = NewHandle(size)) == NULL || MemError()) {
gc();
if ((h = NewHandle(size)) == NULL || MemError())
xlfail("Allocation Failed");
}
for (p = (char *) *h; size > 0; *p++ = 0, size--);
return ((ALLOCTYPE *) h);
#else
StReallocData r;
r = (StReallocData) StCalloc(sizeof(realloc_data), 1);
r->size = n * m;
r->data = StCalloc(r->size, 1);
return((ALLOCTYPE *) r);
#endif /* MACINTOSH */
}
VOID StRFree P1C(ALLOCTYPE *, p)
{
StReallocData d = (StReallocData) p;
#ifdef MACINTOSH
if (d != NULL) DisposeHandle((Handle) d);
#else
if (d != NULL) {
StFree(d->data);
StFree(d);
}
#endif /* MACINTOSH */
}
ALLOCTYPE *StRRealloc P3C(ALLOCTYPE *, q, int, n, int, m)
{
StReallocData d = (StReallocData) q;
#ifdef MACINTOSH
long oldSize, newSize, i;
char *p;
oldSize = (d != NULL) ? GetHandleSize((Handle) d) : 0;
newSize = (long) n * (long) m;
if (d == NULL) d = (StReallocData) NewHandle(newSize);
else SetHandleSize((Handle) d, newSize);
if (d == NULL || MemError()) xlfail("Allocation Failed");
for (p = (char *) *d, i = oldSize; i < newSize; p[i] = 0, i++);
return ((ALLOCTYPE *) d);
#else
int oldsize, size;
if (d == NULL) {
d = (StReallocData) StRCalloc(n, m);
if (d == NULL) xlfail("Allocation Failed");
}
else {
size = n * m;
d->data = realloc(d->data, size);
if (d->data == NULL) xlfail("Allocation Failed");
oldsize = d->size;
d->size = size;
if (size > oldsize) {
MEMSET((char *)d->data + oldsize, 0, size - oldsize);
}
}
return((ALLOCTYPE *) d);
#endif /* MACINTOSH */
}
long StRSize P1C(ALLOCTYPE *, p)
{
StReallocData d = (StReallocData) p;
#ifdef MACINTOSH
return ((d != NULL) ? GetHandleSize((Handle) d) : 0L);
#else
return((d != NULL) ? d->size : 0);
#endif /* MACINTOSH */
}
ALLOCTYPE *StRPtr P1C(ALLOCTYPE *, p)
{
StReallocData d = (StReallocData) p;
#ifdef MACINTOSH
return ((d != NULL) ? (ALLOCTYPE *) *d : NULL);
#else
if (d != NULL && d->data == NULL) xlfail("bad relocatable data");
return((d != NULL) ? d->data : NULL);
#endif /* MACINTOSH */
}
VOID StRLock P1C(ALLOCTYPE *, p)
{
#ifdef MACINTOSH
HLock((Handle) p);
#endif /* MACINTOSH */
}
VOID StRUnlock P1C(ALLOCTYPE *, p)
{
#ifdef MACINTOSH
HUnlock((Handle) p);
#endif /* MACINTOSH */
}
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