From 57045df5fe3ec557e57dc7434ac1a07b5521bffc Mon Sep 17 00:00:00 2001
From: Guenter  Geiger <ggeiger@users.sourceforge.net>
Date: Mon, 29 Jul 2002 17:06:19 +0000
Subject: This commit was generated by cvs2svn to compensate for changes in
 r58, which included commits to RCS files with non-trunk default branches.

svn path=/trunk/; revision=59
---
 pd/src/m_atom.c | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 pd/src/m_atom.c

(limited to 'pd/src/m_atom.c')

diff --git a/pd/src/m_atom.c b/pd/src/m_atom.c
new file mode 100644
index 00000000..c9c4c284
--- /dev/null
+++ b/pd/src/m_atom.c
@@ -0,0 +1,129 @@
+/* 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_imp.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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