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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include <stdio.h>
#include <string.h>
/* convenience routines for checking and getting values of
atoms. There's no "pointer" version since there's nothing
safe to return if there's an error. */
t_float atom_getfloat(t_atom *a)
{
if (a->a_type == A_FLOAT) return (a->a_w.w_float);
else return (0);
}
t_int atom_getint(t_atom *a)
{
return (atom_getfloat(a));
}
t_symbol *atom_getsymbol(t_atom *a) /* LATER think about this more carefully */
{
char buf[30];
if (a->a_type == A_SYMBOL) return (a->a_w.w_symbol);
else return (&s_float);
}
t_symbol *atom_gensym(t_atom *a) /* this works better for graph labels */
{
char buf[30];
if (a->a_type == A_SYMBOL) return (a->a_w.w_symbol);
else if (a->a_type == A_FLOAT)
sprintf(buf, "%g", a->a_w.w_float);
else strcpy(buf, "???");
return (gensym(buf));
}
t_float atom_getfloatarg(int which, int argc, t_atom *argv)
{
if (argc <= which) return (0);
argv += which;
if (argv->a_type == A_FLOAT) return (argv->a_w.w_float);
else return (0);
}
t_int atom_getintarg(int which, int argc, t_atom *argv)
{
return (atom_getfloatarg(which, argc, argv));
}
t_symbol *atom_getsymbolarg(int which, int argc, t_atom *argv)
{
if (argc <= which) return (&s_);
argv += which;
if (argv->a_type == A_SYMBOL) return (argv->a_w.w_symbol);
else return (&s_);
}
/* convert an atom into a string, in the reverse sense of binbuf_text (q.v.)
* special attention is paid to symbols containing the special characters
* ';', ',', '$', and '\'; these are quoted with a preceding '\', except that
* the '$' only gets quoted at the beginning of the string.
*/
void atom_string(t_atom *a, char *buf, unsigned int bufsize)
{
char tbuf[30];
switch(a->a_type)
{
case A_SEMI: strcpy(buf, ";"); break;
case A_COMMA: strcpy(buf, ","); break;
case A_POINTER:
strcpy(buf, "(pointer)");
break;
case A_FLOAT:
sprintf(tbuf, "%g", a->a_w.w_float);
if (strlen(tbuf) < bufsize-1) strcpy(buf, tbuf);
else if (a->a_w.w_float < 0) strcpy(buf, "-");
else strcat(buf, "+");
break;
case A_SYMBOL:
{
char *sp;
unsigned int len;
int quote;
for (sp = a->a_w.w_symbol->s_name, len = 0, quote = 0; *sp; sp++, len++)
if (*sp == ';' || *sp == ',' || *sp == '\\' ||
(*sp == '$' && sp == a->a_w.w_symbol->s_name && sp[1] >= '0'
&& sp[1] <= '9'))
quote = 1;
if (quote)
{
char *bp = buf, *ep = buf + (bufsize-2);
sp = a->a_w.w_symbol->s_name;
while (bp < ep && *sp)
{
if (*sp == ';' || *sp == ',' || *sp == '\\' ||
(*sp == '$' && bp == buf && sp[1] >= '0' && sp[1] <= '9'))
*bp++ = '\\';
*bp++ = *sp++;
}
if (*sp) *bp++ = '*';
*bp = 0;
/* post("quote %s -> %s", a->a_w.w_symbol->s_name, buf); */
}
else
{
if (len < bufsize-1) strcpy(buf, a->a_w.w_symbol->s_name);
else
{
strncpy(buf, a->a_w.w_symbol->s_name, bufsize - 2);
strcpy(buf + (bufsize - 2), "*");
}
}
}
break;
case A_DOLLAR:
sprintf(buf, "$%d", a->a_w.w_index);
break;
case A_DOLLSYM:
sprintf(buf, "$%s", a->a_w.w_symbol->s_name);
break;
default:
bug("atom_string");
}
}
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