aboutsummaryrefslogtreecommitdiff
path: root/externals/grill/flext/source/flsupport.cpp
blob: 115e0ee69eacd77c83749f9993a2bf12f7f710e3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/* 

flext - C++ layer for Max/MSP and pd (pure data) externals

Copyright (c) 2001-2003 Thomas Grill (xovo@gmx.net)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.  

*/

/*! \file flsupport.cpp
    \brief flext support functions and classes.
*/
 
#include "flext.h"

const t_symbol *flext::sym_float = NULL;
const t_symbol *flext::sym_symbol = NULL;
const t_symbol *flext::sym_bang = NULL;
const t_symbol *flext::sym_list = NULL;
const t_symbol *flext::sym_pointer = NULL;
const t_symbol *flext::sym_int = NULL;

#if FLEXT_SYS != FLEXT_SYS_JMAX
const t_symbol *flext::sym_anything = NULL;
#endif

#if FLEXT_SYS == FLEXT_SYS_PD
const t_symbol *flext::sym_signal = NULL;
#endif

void flext::Setup()
{
#if FLEXT_SYS == FLEXT_SYS_PD
	sym_anything = &s_anything;
	sym_pointer = &s_pointer;
	sym_float = &s_float;
	sym_symbol = &s_symbol;
	sym_bang = &s_bang;
	sym_list = &s_list;
	sym_signal = &s_signal;
#elif FLEXT_SYS == FLEXT_SYS_MAX
	sym_int = gensym("int");
	sym_float = gensym("float");
	sym_symbol = gensym("symbol");
	sym_bang = gensym("bang");
	sym_list = gensym("list");
	sym_anything = gensym("anything");
#elif FLEXT_SYS == FLEXT_SYS_JMAX
	sym_int = fts_s_int;
	sym_float = fts_s_float;
	sym_symbol = fts_s_symbol;
	sym_bang = fts_s_bang;
	sym_list = fts_s_list;
	sym_pointer = fts_s_pointer;
#else
#endif
}


/////////////////////////////////////////////////////////
// overloaded new/delete memory allocation methods
//
/////////////////////////////////////////////////////////

void *flext::operator new(size_t bytes)
{
	bytes += sizeof(size_t);
#if FLEXT_SYS == FLEXT_SYS_JMAX
	char *blk = (char *)::fts_malloc(bytes);
#else
	char *blk = (char *)::getbytes(bytes);
#endif
	*(size_t *)blk = bytes;
	return blk+sizeof(size_t);
}

void flext::operator delete(void *blk)
{
	char *ori = (char *)blk-sizeof(size_t);
#if FLEXT_SYS == FLEXT_SYS_JMAX
	fts_free(ori);
#else
	size_t bytes = *(size_t *)ori;
	::freebytes(ori,bytes);
#endif
}

void *flext::NewAligned(size_t bytes,int bitalign)
{
	const size_t ovh = sizeof(size_t)+sizeof(char *);
	const unsigned long alignovh = bitalign/8-1;
	bytes += ovh+alignovh;
#if FLEXT_SYS == FLEXT_SYS_JMAX
	char *blk = (char *)::fts_malloc(bytes);
#else
	char *blk = (char *)::getbytes(bytes);
#endif
	char *ablk = reinterpret_cast<char *>((reinterpret_cast<unsigned long>(blk)+ovh+alignovh) & ~alignovh);
	*(char **)(ablk-sizeof(size_t)-sizeof(char *)) = blk;
	*(size_t *)(ablk-sizeof(size_t)) = bytes;
	return ablk;
}

void flext::FreeAligned(void *blk)
{
	char *ori = *(char **)((char *)blk-sizeof(size_t)-sizeof(char *));

#if FLEXT_SYS == FLEXT_SYS_JMAX
	fts_free(ori);
#else
	size_t bytes = *(size_t *)((char *)blk-sizeof(size_t));
	::freebytes(ori,bytes);
#endif
}

// ------------------------------------------

//! \todo there is probably also a shortcut for Max and jMax
void flext::GetAString(const t_atom &a,char *buf,int szbuf)
{ 
#if FLEXT_SYS == FLEXT_SYS_PD
	atom_string(const_cast<t_atom *>(&a),buf,szbuf);
#else
	if(IsSymbol(a)) snprintf(buf,szbuf,GetString(a));
	else if(IsFloat(a)) snprintf(buf,szbuf,"%f",GetFloat(a));
	else if(IsInt(a)) snprintf(buf,szbuf,"%i",GetInt(a));
    else strncpy(buf,"",szbuf);
#endif
}  

unsigned long flext::AtomHash(const t_atom &a)
{
#if FLEXT_SYS == FLEXT_SYS_MAX || FLEXT_SYS == FLEXT_SYS_PD
	return ((unsigned long)a.a_type<<28)^*(unsigned long *)&a.a_w;
#else
#error Not implemented
#endif
}

unsigned int flext::FoldBits(unsigned long h,int bits)
{
	if(!bits) return 0;
	const int hmax = (1<<bits)-1;
	unsigned int ret = 0;
	for(unsigned int i = 0; i < sizeof(h)*8; i += bits)
		ret ^= (h>>i)&hmax;
	return ret;
}

int flext::Int2Bits(unsigned long n)
{
	int b;
	for(b = 0; n; ++b) n >>= 1;
	return b;
}