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/* Copyright (c) 1997-2004 Miller Puckette, krzYszcz, and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
/* Parts of Pd API are duplicated here, as needed by standalone versions of
Pd modules. LATER standalones should be linked to the Pd API library. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "standalone.h"
void *getbytes(size_t nbytes)
{
void *ret;
if (nbytes < 1) nbytes = 1;
ret = (void *)calloc(nbytes, 1);
if (!ret)
fprintf(stderr, "ERROR: getbytes() failed -- out of memory");
return (ret);
}
void *resizebytes(void *old, size_t oldsize, size_t newsize)
{
void *ret;
if (newsize < 1) newsize = 1;
if (oldsize < 1) oldsize = 1;
ret = (void *)realloc((char *)old, newsize);
if (newsize > oldsize && ret)
memset(((char *)ret) + oldsize, 0, newsize - oldsize);
if (!ret)
fprintf(stderr, "ERROR: resizebytes() failed -- out of memory");
return (ret);
}
void freebytes(void *fatso, size_t nbytes)
{
free(fatso);
}
#define HASHSIZE 1024
static t_symbol *symhash[HASHSIZE];
static t_symbol *dogensym(char *s, t_symbol *oldsym)
{
t_symbol **sym1, *sym2;
unsigned int hash1 = 0, hash2 = 0;
int length = 0;
char *s2 = s;
while (*s2)
{
hash1 += *s2;
hash2 += hash1;
length++;
s2++;
}
sym1 = symhash + (hash2 & (HASHSIZE-1));
while (sym2 = *sym1)
{
if (!strcmp(sym2->s_name, s)) return(sym2);
sym1 = &sym2->s_next;
}
if (oldsym) sym2 = oldsym;
else
{
sym2 = (t_symbol *)getbytes(sizeof(*sym2));
sym2->s_name = getbytes(length+1);
sym2->s_next = 0;
sym2->s_thing = 0;
strcpy(sym2->s_name, s);
}
*sym1 = sym2;
return (sym2);
}
t_symbol *gensym(char *s)
{
return(dogensym(s, 0));
}
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