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|
/* This is a version hacked by Martin Peach 20110120 martin.peach@sympatico.ca */
/* Reformmatted the code and added some debug messages. Changed the name of the class to pdlua */
/** @file lua.c
* @brief pdlua -- a Lua embedding for Pd.
* @author Claude Heiland-Allen <claudiusmaximus@goto10.org>
* @date 2008
* @version 0.6~svn
*
* Copyright (C) 2007,2008 Claude Heiland-Allen <claudiusmaximus@goto10.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/* various C stuff, mainly for reading files */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _MSC_VER
#include <io.h>
#define read _read
#define close _close
#define ssize_t int
#else
#include <unistd.h>
#endif
/* we use Lua */
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
/* we use Pd */
#include "m_pd.h"
#include "s_stuff.h" // for sys_register_loader()
#ifdef _MSC_VER
#include <s_stuff.h>
#endif
/* BAD: support for Pd < 0.41 */
#if PD_MAJOR_VERSION == 0
# if PD_MINOR_VERSION >= 41
# define PDLUA_PD41
/* use new garray support that is 64-bit safe */
# define PDLUA_ARRAYGRAB garray_getfloatwords
# define PDLUA_ARRAYTYPE t_word
# define PDLUA_ARRAYELEM(arr,idx) ((arr)[(idx)].w_float)
# elif PD_MINOR_VERSION >= 40
# define PDLUA_PD40
/* use old garray support, not 64-bit safe */
# define PDLUA_ARRAYGRAB garray_getfloatarray
# define PDLUA_ARRAYTYPE t_float
# define PDLUA_ARRAYELEM(arr,idx) ((arr)[(idx)])
# elif PD_MINOR_VERSION >= 39
# define PDLUA_PD39
/* use old garray support, not 64-bit safe */
# define PDLUA_ARRAYGRAB garray_getfloatarray
# define PDLUA_ARRAYTYPE t_float
# define PDLUA_ARRAYELEM(arr,idx) ((arr)[(idx)])
# else
# error "Pd version is too old, please upgrade"
# endif
#else
# error "Pd version is too new, please file a bug report"
#endif
/* BAD: end of bad section */
/* EVIL: TODO: File requests/patches to Pd so that this becomes unnecessary. */
/** Pd loader type, defined in pd/src/s_loader.c but not exported. */
//typedef int (*loader_t)(t_canvas *, char *);
/** Pd loader registration, defined in pd/src/s_loader.c but not exported. */
//void sys_register_loader(loader_t loader);
/** Pd extern dir declaration (for help finding), defined in pd/src/m_class.c but not exported. */
//void class_set_extern_dir(t_symbol *s);
/** Pd [value] getter, defined in pd/src/x_connective.c but not exported. */
//int value_getfloat(t_symbol *s, t_float *f);
/** Pd [value] setter, defined in pd/src/x_connective.c but not exported. */
//int value_setfloat(t_symbol *s, t_float f);
/* EVIL: end of evil section. */
/* If defined, PDLUA_DEBUG lets pdlua post a lot of text */
// #define PDLUA_DEBUG
/** Global Lua interpreter state, needed in the constructor. */
static lua_State *L;
/** State for the Lua file reader. */
typedef struct pdlua_readerdata
{
int fd; /**< File descriptor to read from. */
char buffer[MAXPDSTRING]; /**< Buffer to read into. */
} t_pdlua_readerdata;
/** Lua file reader callback. */
static const char *pdlua_reader
(
lua_State *L, /**< Lua interpreter state. */
void *rr, /**< Lua file reader state. */
size_t *size /**< How much data we have read. */
)
{
t_pdlua_readerdata *r = rr;
ssize_t s;
#ifdef PDLUA_DEBUG
post("pdlua_reader: fd is %d", r->fd);
#endif // PDLUA_DEBUG
s = read(r->fd, r->buffer, MAXPDSTRING-2);
#ifdef PDLUA_DEBUG
post("pdlua_reader: s is %ld", s);////////
#endif // PDLUA_DEBUG
if (s <= 0)
{
*size = 0;
return NULL;
}
else
{
*size = s;
return r->buffer;
}
}
/* declare some stuff in advance */
struct pdlua_proxyinlet;
struct pdlua_proxyreceive;
struct pdlua_proxyclock;
/** Pd object data. */
typedef struct pdlua
{
t_object pd; /**< We are a Pd object. */
unsigned int inlets; /**< Number of inlets. */
struct pdlua_proxyinlet *in; /**< The inlets themselves. */
unsigned int outlets; /**< Number of outlets. */
t_outlet **out; /**< The outlets themselves. */
t_canvas *canvas; /**< The canvas that the object was created on. */
} t_pdlua;
/* more forward declarations */
static void pdlua_dispatch(t_pdlua *o, unsigned int inlet, t_symbol *s, int argc, t_atom *argv);
static void pdlua_receivedispatch(struct pdlua_proxyreceive *r, t_symbol *s, int argc, t_atom *argv);
static void pdlua_clockdispatch(struct pdlua_proxyclock *clock);
/** Proxy inlet class pointer. */
static t_class *pdlua_proxyinlet_class;
/** Proxy inlet object data. */
typedef struct pdlua_proxyinlet
{
t_pd pd; /**< Minimal Pd object. */
struct pdlua *owner; /**< The owning object to forward inlet messages to. */
unsigned int id; /**< The number of this inlet. */
} t_pdlua_proxyinlet;
/** Proxy inlet 'anything' method. */
static void pdlua_proxyinlet_anything
(
t_pdlua_proxyinlet *p, /**< The proxy inlet that received the message. */
t_symbol *s, /**< The message selector. */
int argc, /**< The message length. */
t_atom *argv /**< The atoms in the message. */
)
{
pdlua_dispatch(p->owner, p->id, s, argc, argv);
}
/** Proxy inlet initialization. */
static void pdlua_proxyinlet_init
(
t_pdlua_proxyinlet *p, /**< The proxy inlet to initialize. */
struct pdlua *owner, /**< The owning object. */
unsigned int id /**< The inlet number. */
)
{
p->pd = pdlua_proxyinlet_class;
p->owner = owner;
p->id = id;
}
/** Register the proxy inlet class with Pd. */
static void pdlua_proxyinlet_setup(void)
{
pdlua_proxyinlet_class = class_new(gensym("pdlua proxy inlet"), 0, 0, sizeof(t_pdlua_proxyinlet), 0, 0);
class_addanything(pdlua_proxyinlet_class, pdlua_proxyinlet_anything);
}
/** Proxy receive class pointer. */
static t_class *pdlua_proxyreceive_class;
/** Proxy receive object data. */
typedef struct pdlua_proxyreceive
{
t_pd pd; /**< Minimal Pd object. */
struct pdlua *owner; /**< The owning object to forward received messages to. */
t_symbol *name; /**< The receive-symbol to bind to. */
} t_pdlua_proxyreceive;
/** Proxy receive 'anything' method. */
static void pdlua_proxyreceive_anything(
t_pdlua_proxyreceive *r, /**< The proxy receive that received the message. */
t_symbol *s, /**< The message selector. */
int argc, /**< The message length. */
t_atom *argv /**< The atoms in the message. */
)
{
pdlua_receivedispatch(r, s, argc, argv);
}
/** Proxy receive allocation and initialization. */
static t_pdlua_proxyreceive *pdlua_proxyreceive_new
(
struct pdlua *owner, /**< The owning object. */
t_symbol *name /**< The symbol to bind to. */
)
{
t_pdlua_proxyreceive *r = malloc(sizeof(t_pdlua_proxyreceive));
r->pd = pdlua_proxyreceive_class;
r->owner = owner;
r->name = name;
pd_bind(&r->pd, r->name);
return r;
}
/** Proxy receive cleanup and deallocation. */
static void pdlua_proxyreceive_free(t_pdlua_proxyreceive *r /**< The proxy receive to free. */)
{
pd_unbind(&r->pd, r->name);
r->pd = NULL;
r->owner = NULL;
r->name = NULL;
free(r);
}
/** Register the proxy receive class with Pd. */
static void pdlua_proxyreceive_setup()
{
pdlua_proxyreceive_class = class_new(gensym("pdlua proxy receive"), 0, 0, sizeof(t_pdlua_proxyreceive), 0, 0);
class_addanything(pdlua_proxyreceive_class, pdlua_proxyreceive_anything);
}
/** Proxy clock class pointer. */
static t_class *pdlua_proxyclock_class;
/** Proxy clock object data. */
typedef struct pdlua_proxyclock
{
t_pd pd; /**< Minimal Pd object. */
struct pdlua *owner; /**< Object to forward messages to. */
t_clock *clock; /** Pd clock to use. */
} t_pdlua_proxyclock;
/** Proxy clock 'bang' method. */
static void pdlua_proxyclock_bang(t_pdlua_proxyclock *c /**< The proxy clock that received the message. */)
{
pdlua_clockdispatch(c);
}
/** Proxy clock allocation and initialization. */
static t_pdlua_proxyclock *pdlua_proxyclock_new
(
struct pdlua *owner /**< The object to forward messages to. */
)
{
t_pdlua_proxyclock *c = malloc(sizeof(t_pdlua_proxyclock));
c->pd = pdlua_proxyclock_class;
c->owner = owner;
c->clock = clock_new(c, (t_method) pdlua_proxyclock_bang);
return c;
}
/** Register the proxy clock class with Pd. */
static void pdlua_proxyclock_setup(void)
{
pdlua_proxyclock_class = class_new(gensym("pdlua proxy clock"), 0, 0, sizeof(t_pdlua_proxyclock), 0, 0);
}
/** Dump an array of atoms into a Lua table. */
static void pdlua_pushatomtable
(
int argc, /**< The number of atoms in the array. */
t_atom *argv /**< The array of atoms. */
)
{
int i;
lua_newtable(L);
for (i = 0; i < argc; ++i)
{
lua_pushnumber(L, i+1);
switch (argv[i].a_type)
{
case A_FLOAT:
lua_pushnumber(L, argv[i].a_w.w_float);
break;
case A_SYMBOL:
lua_pushstring(L, argv[i].a_w.w_symbol->s_name);
break;
case A_POINTER: /* FIXME: check experimentality */
lua_pushlightuserdata(L, argv[i].a_w.w_gpointer);
break;
default:
error("lua: zomg weasels!");
lua_pushnil(L);
break;
}
lua_settable(L, -3);
}
}
/** Pd object constructor. */
static t_pdlua *pdlua_new
(
t_symbol *s, /**< The construction message selector. */
int argc, /**< The construction message atom count. */
t_atom *argv /**< The construction message atoms. */
)
{
int i;
#ifdef PDLUA_DEBUG
post("pdlua_new: s->s_name is %s", s->s_name);
#endif // PDLUA_DEBUG
for (i = 0; i < argc; ++i)
{
switch (argv[i].a_type)
{
case A_FLOAT:
#ifdef PDLUA_DEBUG
post("argv[%d]: %f", i, argv[i].a_w.w_float);
#endif // PDLUA_DEBUG
break;
case A_SYMBOL:
#ifdef PDLUA_DEBUG
post("argv[%d]: %s", i, argv[i].a_w.w_symbol->s_name);
#endif // PDLUA_DEBUG
break;
default:
error("pdlua_new: bad argument type"); // should never happen
return NULL;
}
}
lua_getglobal(L, "pd");
lua_getfield(L, -1, "_constructor");
lua_pushstring(L, s->s_name);
pdlua_pushatomtable(argc, argv);
if (lua_pcall(L, 2, 1, 0))
{
error("pdlua_new: error in constructor for `%s':\n%s", s->s_name, lua_tostring(L, -1));
lua_pop(L, 1);
return NULL;
}
else
{
t_pdlua *object = NULL;
#ifdef PDLUA_DEBUG
post("pdlua_new: done lua_pcall(L, 2, 1, 0)");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, -1))
{
object = lua_touserdata(L, -1);
lua_pop(L, 1);
#ifdef PDLUA_DEBUG
post("pdlua_new: TRUE lua_islightuserdata(L, -1) object = %p", object);
#endif // PDLUA_DEBUG
return object;
}
else
{
lua_pop(L, 1);
#ifdef PDLUA_DEBUG
post("pdlua_new: done FALSE lua_islightuserdata(L, -1)");
#endif // PDLUA_DEBUG
return NULL;
}
}
}
/** Pd object destructor. */
static void pdlua_free( t_pdlua *o /**< The object to destruct. */)
{
lua_getglobal(L, "pd");
lua_getfield (L, -1, "_destructor");
lua_pushlightuserdata(L, o);
if (lua_pcall(L, 1, 0, 0))
{
error("lua: error in destructor:\n%s", lua_tostring(L, -1));
lua_pop(L, 1);
}
return;
}
/** Lua class registration. */
static int pdlua_class_new(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Class name string.
* \par Outputs:
* \li \c 1 Pd class pointer.
* */
{
const char *name;
t_class *c;
#ifdef PDLUA_DEBUG
post("pdlua_class_new:");
#endif // PDLUA_DEBUG
name = luaL_checkstring(L, 1);
c = class_new(gensym((char *) name), (t_newmethod) pdlua_new,
(t_method) pdlua_free, sizeof(t_pdlua), CLASS_NOINLET, A_GIMME, 0);
lua_pushlightuserdata(L, c);
return 1;
}
/** Lua object creation. */
static int pdlua_object_new(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd class pointer.
* \par Outputs:
* \li \c 2 Pd object pointer.
* */
{
#ifdef PDLUA_DEBUG
post("pdlua_object_new:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_class *c = lua_touserdata(L, 1);
if (c)
{
t_pdlua *o = (t_pdlua *) pd_new(c);
if (o)
{
o->inlets = 0;
o->in = NULL;
o->outlets = 0;
o->out = NULL;
o->canvas = canvas_getcurrent();
lua_pushlightuserdata(L, o);
return 1;
}
}
}
return 0;
}
/** Lua object inlet creation. */
static int pdlua_object_createinlets(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Number of inlets.
* */
{
unsigned int i;
#ifdef PDLUA_DEBUG
post("pdlua_object_createinlets:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_pdlua *o = lua_touserdata(L, 1);
if (o)
{
o->inlets = luaL_checknumber(L, 2);
o->in = malloc(o->inlets * sizeof(t_pdlua_proxyinlet));
for (i = 0; i < o->inlets; ++i)
{
pdlua_proxyinlet_init(&o->in[i], o, i);
inlet_new(&o->pd, &o->in[i].pd, 0, 0);
}
}
}
return 0;
}
/** Lua object outlet creation. */
static int pdlua_object_createoutlets(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Number of outlets.
* */
{
unsigned int i;
#ifdef PDLUA_DEBUG
post("pdlua_object_createoutlets:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_pdlua *o = lua_touserdata(L, 1);
if (o)
{
o->outlets = luaL_checknumber(L, 2);
if (o->outlets > 0)
{
o->out = malloc(o->outlets * sizeof(t_outlet *));
for (i = 0; i < o->outlets; ++i) o->out[i] = outlet_new(&o->pd, 0);
}
else o->out = NULL;
}
}
return 0;
}
/** Lua object receive creation. */
static int pdlua_receive_new(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Receive name string.
* \par Outputs:
* \li \c 1 Pd receive pointer.
* */
{
#ifdef PDLUA_DEBUG
post("pdlua_receive_new:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_pdlua *o = lua_touserdata(L, 1);
if (o)
{
const char *name = luaL_checkstring(L, 2);
if (name)
{
t_pdlua_proxyreceive *r = pdlua_proxyreceive_new(o, gensym((char *) name)); /* const cast */
lua_pushlightuserdata(L, r);
return 1;
}
}
}
return 0;
}
/** Lua object receive destruction. */
static int pdlua_receive_free(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd recieve pointer.
* */
{
#ifdef PDLUA_DEBUG
post("pdlua_receive_free:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_pdlua_proxyreceive *r = lua_touserdata(L, 1);
if (r) pdlua_proxyreceive_free(r);
}
return 0;
}
/** Lua object clock creation. */
static int pdlua_clock_new(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \par Outputs:
* \li \c 1 Pd clock pointer.
* */
{
if (lua_islightuserdata(L, 1))
{
t_pdlua *o = lua_touserdata(L, 1);
if (o)
{
t_pdlua_proxyclock *c = pdlua_proxyclock_new(o);
lua_pushlightuserdata(L, c);
return 1;
}
}
return 0;
}
/** Lua proxy clock delay. */
static int pdlua_clock_delay(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd clock pointer.
* \li \c 2 Number of milliseconds to delay.
* */
{
if (lua_islightuserdata(L, 1))
{
t_pdlua_proxyclock *c = lua_touserdata(L, 1);
if (c)
{
double delaytime = luaL_checknumber(L, 2);
clock_delay(c->clock, delaytime);
}
}
return 0;
}
/** Lua proxy clock set. */
static int pdlua_clock_set(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd clock pointer.
* \li \c 2 Number to set the clock.
* */
{
if (lua_islightuserdata(L, 1))
{
t_pdlua_proxyclock *c = lua_touserdata(L, 1);
if (c)
{
double systime = luaL_checknumber(L, 2);
clock_set(c->clock, systime);
}
}
return 0;
}
/** Lua proxy clock unset. */
static int pdlua_clock_unset(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd clock pointer.
* */
{
if (lua_islightuserdata(L, 1))
{
t_pdlua_proxyclock *c = lua_touserdata(L, 1);
if (c) clock_unset(c->clock);
}
return 0;
}
/** Lua proxy clock destruction. */
static int pdlua_clock_free(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd clock pointer.
* */
{
if (lua_islightuserdata(L, 1))
{
t_pdlua_proxyclock *c = lua_touserdata(L, 1);
if (c)
{
clock_free(c->clock);
free(c);
}
}
return 0;
}
/** Lua object destruction. */
static int pdlua_object_free(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* */
{
unsigned int i;
#ifdef PDLUA_DEBUG
post("pdlua_object_free:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
t_pdlua *o = lua_touserdata(L, 1);
if (o)
{
if (o->in) free(o->in);
if(o->out)
{
for (i = 0; i < o->outlets; ++i) outlet_free(o->out[i]);
free(o->out);
o->out = NULL;
}
}
}
return 0;
}
/** Dispatch Pd inlet messages to Lua objects. */
static void pdlua_dispatch
(
t_pdlua *o, /**< The object that received the message. */
unsigned int inlet, /**< The inlet that the message arrived at. */
t_symbol *s, /**< The message selector. */
int argc, /**< The message length. */
t_atom *argv /**< The atoms in the message. */
)
{
#ifdef PDLUA_DEBUG
post("pdlua_dispatch:");
#endif // PDLUA_DEBUG
lua_getglobal(L, "pd");
lua_getfield (L, -1, "_dispatcher");
lua_pushlightuserdata(L, o);
lua_pushnumber(L, inlet + 1); /* C has 0.., Lua has 1.. */
lua_pushstring(L, s->s_name);
pdlua_pushatomtable(argc, argv);
if (lua_pcall(L, 4, 0, 0))
{
pd_error(o, "lua: error in dispatcher:\n%s", lua_tostring(L, -1));
lua_pop(L, 1);
}
return;
}
/** Dispatch Pd receive messages to Lua objects. */
static void pdlua_receivedispatch
(
t_pdlua_proxyreceive *r, /**< The proxy receive that received the message. */
t_symbol *s, /**< The message selector. */
int argc, /**< The message length. */
t_atom *argv /**< The atoms in the message. */
)
{
#ifdef PDLUA_DEBUG
post("pdlua_receivedispatch:");
#endif // PDLUA_DEBUG
lua_getglobal(L, "pd");
lua_getfield (L, -1, "_receivedispatch");
lua_pushlightuserdata(L, r);
lua_pushstring(L, s->s_name);
pdlua_pushatomtable(argc, argv);
if (lua_pcall(L, 3, 0, 0))
{
pd_error(r->owner, "lua: error in receive dispatcher:\n%s", lua_tostring(L, -1));
lua_pop(L, 1);
}
return;
}
/** Dispatch Pd clock messages to Lua objects. */
static void pdlua_clockdispatch( t_pdlua_proxyclock *clock)
/**< The proxy clock that received the message. */
{
lua_getglobal(L, "pd");
lua_getfield (L, -1, "_clockdispatch");
lua_pushlightuserdata(L, clock);
if (lua_pcall(L, 1, 0, 0))
{
pd_error(clock->owner, "lua: error in clock dispatcher:\n%s", lua_tostring(L, -1));
lua_pop(L, 1);
}
return;
}
/** Convert a Lua table into a Pd atom array. */
static t_atom *pdlua_popatomtable
(
lua_State *L, /**< Lua interpreter state.
* \par Inputs:
* \li \c -1 Table to convert.
* */
int *count, /**< Where to store the array length. */
t_pdlua *o /**< Object reference for error messages. */
)
{
int i;
int ok = 1;
t_float f;
const char *s;
void *p;
size_t sl;
t_atom *atoms = NULL;
if (lua_istable(L, -1))
{
*count = lua_objlen(L, -1);
if (*count > 0) atoms = malloc(*count * sizeof(t_atom));
i = 0;
lua_pushnil(L);
while (lua_next(L, -2) != 0)
{
if (i == *count)
{
pd_error(o, "lua: error: too many table elements");
ok = 0;
break;
}
switch (lua_type(L, -1))
{
case (LUA_TNUMBER):
f = lua_tonumber(L, -1);
SETFLOAT(&atoms[i], f);
break;
case (LUA_TSTRING):
s = lua_tolstring(L, -1, &sl);
if (s)
{
if (strlen(s) != sl) pd_error(o, "lua: warning: symbol munged (contains \\0 in body)");
SETSYMBOL(&atoms[i], gensym((char *) s));
}
else
{
pd_error(o, "lua: error: null string in table");
ok = 0;
}
break;
case (LUA_TLIGHTUSERDATA): /* FIXME: check experimentality */
p = lua_touserdata(L, -1);
SETPOINTER(&atoms[i], p);
break;
default:
pd_error(o, "lua: error: table element must be number or string or pointer");
ok = 0;
break;
}
lua_pop(L, 1);
++i;
}
if (i != *count)
{
pd_error(o, "lua: error: too few table elements");
ok = 0;
}
}
else
{
pd_error(o, "lua: error: not a table");
ok = 0;
}
lua_pop(L, 1);
if (ok) return atoms;
if (atoms) free(atoms);
return NULL;
}
/** Send a message from a Lua object outlet. */
static int pdlua_outlet(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Outlet number.
* \li \c 3 Message selector string.
* \li \c 4 Message atom table.
* */
{
t_pdlua *o;
int out;
size_t sl;
const char *s;
t_symbol *sym;
int count;
t_atom *atoms;
#ifdef PDLUA_DEBUG
post("pdlua_outlet:");
#endif // PDLUA_DEBUG
if (lua_islightuserdata(L, 1))
{
o = lua_touserdata(L, 1);
if (o)
{
if (lua_isnumber(L, 2)) out = lua_tonumber(L, 2) - 1; /* C has 0.., Lua has 1.. */
else
{
pd_error(o, "lua: error: outlet must be a number");
return 0;
}
if (0 <= out && out < o->outlets)
{
if (lua_isstring(L, 3))
{
s = lua_tolstring(L, 3, &sl);
sym = gensym((char *) s); /* const cast */
if (s)
{
if (strlen(s) != sl) pd_error(o, "lua: warning: symbol munged (contains \\0 in body)");
lua_pushvalue(L, 4);
atoms = pdlua_popatomtable(L, &count, o);
if (count == 0 || atoms) outlet_anything(o->out[out], sym, count, atoms);
else pd_error(o, "lua: error: no atoms??");
if (atoms)
{
free(atoms);
return 0;
}
}
else pd_error(o, "lua: error: null selector");
}
else pd_error(o, "lua: error: selector must be a string");
}
else pd_error(o, "lua: error: outlet out of range");
}
else error("lua: error: no object to outlet from");
}
else error("lua: error: bad arguments to outlet");
return 0;
}
/** Send a message from a Lua object to a Pd receiver. */
static int pdlua_send(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Receiver string.
* \li \c 2 Message selector string.
* \li \c 3 Message atom table.
* */
{
size_t receivenamel;
const char *receivename;
t_symbol *receivesym;
size_t selnamel;
const char *selname;
t_symbol *selsym;
int count;
t_atom *atoms;
#ifdef PDLUA_DEBUG
post("pdlua_send:");
#endif // PDLUA_DEBUG
if (lua_isstring(L, 1))
{
receivename = lua_tolstring(L, 1, &receivenamel);
receivesym = gensym((char *) receivename); /* const cast */
if (receivesym)
{
if (strlen(receivename) != receivenamel) error("lua: warning: symbol munged (contains \\0 in body)");
if (lua_isstring(L, 2))
{
selname = lua_tolstring(L, 2, &selnamel);
selsym = gensym((char *) selname); /* const cast */
if (selsym)
{
if (strlen(selname) != selnamel) error("lua: warning: symbol munged (contains \\0 in body)");
lua_pushvalue(L, 3);
atoms = pdlua_popatomtable(L, &count, NULL);
if ((count == 0 || atoms) && (receivesym->s_thing)) typedmess(receivesym->s_thing, selsym, count, atoms);
else error("lua: error: no atoms??");
if (atoms)
{
free(atoms);
return 0;
}
}
else error("lua: error: null selector");
}
else error("lua: error: selector must be a string");
}
else error("lua: error: null receive name");
}
else error("lua: error: receive name must be string");
return 0;
}
/** Set a [value] object's value. */
static int pdlua_setvalue(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Value name string.
* \li \c 2 Value number.
* \par Outputs:
* \li \c 1 success (usually depends on a [value] existing or not).
*/
{
const char *str = luaL_checkstring(L, 1);
t_float val = luaL_checknumber(L, 2);
int err = value_setfloat(gensym(str), val);
lua_pushboolean(L, !err);
return 1;
}
/** Get a [value] object's value. */
static int pdlua_getvalue(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Value name string.
* \par Outputs:
* \li \c 1 Value number, or nil for failure.
* */
{
const char *str = luaL_checkstring(L, 1);
t_float val;
int err = value_getfloat(gensym(str), &val);
if (!err) lua_pushnumber(L, val);
else lua_pushnil(L);
return 1;
}
/** Get a [table] object's array. */
static int pdlua_getarray(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Table name string.
* \par Outputs:
* \li \c 1 Table length, or < 0 for failure.
* \li \c 2 Table pointer, or nil for failure.
* */
{
t_garray *a;
int n;
PDLUA_ARRAYTYPE *v;
const char *str = luaL_checkstring(L, 1);
if (!(a = (t_garray *) pd_findbyclass(gensym(str), garray_class)))
{
lua_pushnumber(L, -1);
return 1;
}
else if (!PDLUA_ARRAYGRAB(a, &n, &v))
{
lua_pushnumber(L, -2);
return 1;
}
else
{
lua_pushnumber(L, n);
lua_pushlightuserdata(L, v);
return 2;
}
}
/** Read from a [table] object's array. */
static int pdlua_readarray(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Table length number.
* \li \c 2 Table array pointer.
* \li \c 3 Table index number.
* \par Outputs:
* \li \c 1 Table element value, or nil for index out of range.
* */
{
int n = luaL_checknumber(L, 1);
PDLUA_ARRAYTYPE *v = lua_islightuserdata(L, 2) ? lua_touserdata(L, 2) : NULL;
int i = luaL_checknumber(L, 3);
if (0 <= i && i < n && v)
{
lua_pushnumber(L, PDLUA_ARRAYELEM(v, i));
return 1;
}
return 0;
}
/** Write to a [table] object's array. */
static int pdlua_writearray(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Table length number.
* \li \c 2 Table array pointer.
* \li \c 3 Table index number.
* \li \c 4 Table element value number.
* */
{
int n = luaL_checknumber(L, 1);
PDLUA_ARRAYTYPE *v = lua_islightuserdata(L, 2) ? lua_touserdata(L, 2) : NULL;
int i = luaL_checknumber(L, 3);
t_float x = luaL_checknumber(L, 4);
if (0 <= i && i < n && v) PDLUA_ARRAYELEM(v, i) = x;
return 0;
}
/** Redraw a [table] object's graph. */
static int pdlua_redrawarray(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Table name string.
* */
{
t_garray *a;
const char *str = luaL_checkstring(L, 1);
if ((a = (t_garray *) pd_findbyclass(gensym(str), garray_class))) garray_redraw(a);
return 0;
}
/** Post to Pd's console. */
static int pdlua_post(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Message string.
* */
{
const char *str = luaL_checkstring(L, 1);
post("%s", str);
return 0;
}
/** Report an error from a Lua object to Pd's console. */
static int pdlua_error(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Message string.
* */
{
t_pdlua *o;
const char *s;
if (lua_islightuserdata(L, 1))
{
o = lua_touserdata(L, 1);
if (o)
{
s = luaL_checkstring(L, 2);
if (s) pd_error(o, "%s", s);
else pd_error(o, "lua: error: null string in error function");
}
else error("lua: error: null object in error function");
}
else error("lua: error: bad arguments to error function");
return 0;
}
void pdlua_setrequirepath
( /* FIXME: documentation */
lua_State *L,
const char *path
)
{
lua_getglobal(L, "pd");
lua_pushstring(L, "_setrequirepath");
lua_gettable(L, -2);
lua_pushstring(L, path);
if (lua_pcall(L, 1, 0, 0) != 0)
{
error("lua: internal error in `pd._setrequirepath': %s", lua_tostring(L, -1));
lua_pop(L, 1);
}
lua_pop(L, 1);
}
void pdlua_clearrequirepath
( /* FIXME: documentation */
lua_State *L
)
{
lua_getglobal(L, "pd");
lua_pushstring(L, "_clearrequirepath");
lua_gettable(L, -2);
if (lua_pcall(L, 0, 0, 0) != 0)
{
error("lua: internal error in `pd._clearrequirepath': %s", lua_tostring(L, -1));
lua_pop(L, 1);
}
lua_pop(L, 1);
}
/** Run a Lua script using Pd's path. */
static int pdlua_dofile(lua_State *L)
/**< Lua interpreter state.
* \par Inputs:
* \li \c 1 Pd object pointer.
* \li \c 2 Filename string.
* \par Outputs:
* \li \c * Determined by the script.
* */
{
char buf[MAXPDSTRING];
char *ptr;
t_pdlua_readerdata reader;
int fd;
int n;
const char *filename;
t_pdlua *o;
#ifdef PDLUA_DEBUG
post("pdlua_dofile:");
#endif // PDLUA_DEBUG
n = lua_gettop(L);
if (lua_islightuserdata(L, 1))
{
o = lua_touserdata(L, 1);
if (o)
{
filename = luaL_optstring(L, 2, NULL);
fd = canvas_open(o->canvas, filename, "", buf, &ptr, MAXPDSTRING, 1);
if (fd >= 0)
{
pdlua_setrequirepath(L, buf);
reader.fd = fd;
if (lua_load(L, pdlua_reader, &reader, filename))
{
close(fd);
pdlua_clearrequirepath(L);
lua_error(L);
}
else
{
if (lua_pcall(L, 0, LUA_MULTRET, 0))
{
pd_error(o, "lua: error running `%s':\n%s", filename, lua_tostring(L, -1));
lua_pop(L, 1);
close(fd);
pdlua_clearrequirepath(L);
}
else
{
/* succeeded */
close(fd);
pdlua_clearrequirepath(L);
}
}
}
else pd_error(o, "lua: error loading `%s': canvas_open() failed", filename);
}
else error("lua: error in object:dofile() - object is null");
}
else error("lua: error in object:dofile() - object is wrong type");
return lua_gettop(L) - n;
}
/** Initialize the pd API for Lua. */
static void pdlua_init(lua_State *L)
/**< Lua interpreter state. */
{
lua_newtable(L);
lua_setglobal(L, "pd");
lua_getglobal(L, "pd");
lua_pushstring(L, "_iswindows");
#ifdef MSW
lua_pushboolean(L, 1);
#else
lua_pushboolean(L, 0);
#endif
lua_settable(L, -3);
lua_pushstring(L, "_register");
lua_pushcfunction(L, pdlua_class_new);
lua_settable(L, -3);
lua_pushstring(L, "_create");
lua_pushcfunction(L, pdlua_object_new);
lua_settable(L, -3);
lua_pushstring(L, "_createinlets");
lua_pushcfunction(L, pdlua_object_createinlets);
lua_settable(L, -3);
lua_pushstring(L, "_createoutlets");
lua_pushcfunction(L, pdlua_object_createoutlets);
lua_settable(L, -3);
lua_pushstring(L, "_destroy");
lua_pushcfunction(L, pdlua_object_free);
lua_settable(L, -3);
lua_pushstring(L, "_outlet");
lua_pushcfunction(L, pdlua_outlet);
lua_settable(L, -3);
lua_pushstring(L, "_createreceive");
lua_pushcfunction(L, pdlua_receive_new);
lua_settable(L, -3);
lua_pushstring(L, "_receivefree");
lua_pushcfunction(L, pdlua_receive_free);
lua_settable(L, -3);
lua_pushstring(L, "_createclock");
lua_pushcfunction(L, pdlua_clock_new);
lua_settable(L, -3);
lua_pushstring(L, "_clockfree");
lua_pushcfunction(L, pdlua_clock_free);
lua_settable(L, -3);
lua_pushstring(L, "_clockset");
lua_pushcfunction(L, pdlua_clock_set);
lua_settable(L, -3);
lua_pushstring(L, "_clockunset");
lua_pushcfunction(L, pdlua_clock_unset);
lua_settable(L, -3);
lua_pushstring(L, "_clockdelay");
lua_pushcfunction(L, pdlua_clock_delay);
lua_settable(L, -3);
lua_pushstring(L, "_dofile");
lua_pushcfunction(L, pdlua_dofile);
lua_settable(L, -3);
lua_pushstring(L, "send");
lua_pushcfunction(L, pdlua_send);
lua_settable(L, -3);
lua_pushstring(L, "getvalue");
lua_pushcfunction(L, pdlua_getvalue);
lua_settable(L, -3);
lua_pushstring(L, "setvalue");
lua_pushcfunction(L, pdlua_setvalue);
lua_settable(L, -3);
lua_pushstring(L, "_getarray");
lua_pushcfunction(L, pdlua_getarray);
lua_settable(L, -3);
lua_pushstring(L, "_readarray");
lua_pushcfunction(L, pdlua_readarray);
lua_settable(L, -3);
lua_pushstring(L, "_writearray");
lua_pushcfunction(L, pdlua_writearray);
lua_settable(L, -3);
lua_pushstring(L, "_redrawarray");
lua_pushcfunction(L, pdlua_redrawarray);
lua_settable(L, -3);
lua_pushstring(L, "post");
lua_pushcfunction(L, pdlua_post);
lua_settable(L, -3);
lua_pushstring(L, "_error");
lua_pushcfunction(L, pdlua_error);
lua_settable(L, -3);
lua_pop(L, 1);
}
/** Pd loader hook for loading and executing Lua scripts. */
static int pdlua_loader
(
t_canvas *canvas, /**< Pd canvas to use to find the script. */
char *name /**< The name of the script (without .pd_lua extension). */
)
{
char dirbuf[MAXPDSTRING];
char *ptr;
int fd;
t_pdlua_readerdata reader;
#ifdef PDLUA_DEBUG
post("pdlua_loader:");
#endif // PDLUA_DEBUG
fd = canvas_open(canvas, name, ".pd_lua", dirbuf, &ptr, MAXPDSTRING, 1);
if (fd >= 0)
{
class_set_extern_dir(gensym(dirbuf));
pdlua_setrequirepath(L, dirbuf);
reader.fd = fd;
if (lua_load(L, pdlua_reader, &reader, name) || lua_pcall(L, 0, 0, 0))
{
error("lua: error loading `%s':\n%s", name, lua_tostring(L, -1));
lua_pop(L, 1);
close(fd);
pdlua_clearrequirepath(L);
class_set_extern_dir(&s_);
return 0;
}
close(fd);
pdlua_clearrequirepath(L);
class_set_extern_dir(&s_);
return 1;
}
return 0;
}
/** Start the Lua runtime and register our loader hook. */
EXTERN void pdlua_setup(void)
{
char buf[MAXPDSTRING];
char *ptr;
t_pdlua_readerdata reader;
int fd;
int result;
post("pdlua 0.6 (GPL) 2011 Martin Peach, based on");
post("lua 0.6~svn (GPL) 2008 Claude Heiland-Allen <claudiusmaximus@goto10.org>");
post("pdlua: compiled for pd-%d.%d on %s %s", PD_MAJOR_VERSION, PD_MINOR_VERSION, __DATE__, __TIME__);
pdlua_proxyinlet_setup();
#ifdef PDLUA_DEBUG
post("pdlua pdlua_proxyinlet_setup done");
#endif // PDLUA_DEBUG
pdlua_proxyreceive_setup();
#ifdef PDLUA_DEBUG
post("pdlua pdlua_proxyreceive_setup done");
#endif // PDLUA_DEBUG
pdlua_proxyclock_setup();
#ifdef PDLUA_DEBUG
post("pdlua pdlua_proxyclock_setup done");
#endif // PDLUA_DEBUG
L = lua_open();
#ifdef PDLUA_DEBUG
post("pdlua lua_open done L = %p", L);
#endif // PDLUA_DEBUG
luaL_openlibs(L);
#ifdef PDLUA_DEBUG
post("pdlua luaL_openlibs done");
#endif // PDLUA_DEBUG
pdlua_init(L);
#ifdef PDLUA_DEBUG
post("pdlua pdlua_init done");
#endif // PDLUA_DEBUG
/* "pd.lua" is the Lua part of pdlua, want to keep the C part minimal */
fd = canvas_open(0, "pd", ".lua", buf, &ptr, MAXPDSTRING, 1);
#ifdef PDLUA_DEBUG
post ("pd.lua loaded from %s", buf);
post("pdlua canvas_open done fd = %d", fd);
#endif // PDLUA_DEBUG
if (fd >= 0)
{
reader.fd = fd;
result = lua_load(L, pdlua_reader, &reader, "pd.lua");
#ifdef PDLUA_DEBUG
post ("pdlua lua_load returned %d", result);
#endif // PDLUA_DEBUG
if (0 == result)
{
result = lua_pcall(L, 0, 0, 0);
#ifdef PDLUA_DEBUG
post ("pdlua lua_pcall returned %d", result);
#endif // PDLUA_DEBUG
}
if (0 != result)
//if (lua_load(L, pdlua_reader, &reader, "pd.lua") || lua_pcall(L, 0, 0, 0))
{
error("lua: error loading `pd.lua':\n%s", lua_tostring(L, -1));
error("lua: loader will not be registered!");
error("lua: (is `pd.lua' in Pd's path list?)");
lua_pop(L, 1);
close(fd);
}
else
{
close(fd);
sys_register_loader(pdlua_loader);
}
}
else
{
error("lua: error loading `pd.lua': canvas_open() failed");
error("lua: loader will not be registered!");
}
}
/* EOF */
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