[PD-cvs] externals/build/src prepend.c,1.1,1.2
Guenter Geiger
ggeiger at users.sourceforge.net
Tue Jun 29 12:36:24 CEST 2004
Update of /cvsroot/pure-data/externals/build/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv16691
Modified Files:
prepend.c
Log Message:
imported cyclone prepend (had to copy whole file)
Index: prepend.c
===================================================================
RCS file: /cvsroot/pure-data/externals/build/src/prepend.c,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** prepend.c 17 Oct 2002 14:14:41 -0000 1.1
--- prepend.c 29 Jun 2004 10:36:22 -0000 1.2
***************
*** 1 ****
! #include "../ggee/control/prepend.c"
--- 1,356 ----
! /* Copyright (c) 2002-2003 krzYszcz and others.
! * For information on usage and redistribution, and for a DISCLAIMER OF ALL
! * WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
!
! #include <string.h>
! #include "m_pd.h"
!
! #define PREPEND_INISIZE 32 /* LATER rethink */
! #define PREPEND_MAXSIZE 256
!
! typedef struct _prepend
! {
! t_object x_ob;
! t_symbol *x_selector;
! int x_size; /* as allocated */
! int x_natoms; /* as used */
! t_atom *x_message;
! t_atom x_messini[PREPEND_INISIZE];
! int x_entered;
! int x_auxsize;
! t_atom *x_auxbuf;
! } t_prepend;
!
! static t_class *prepend_class;
!
! void *grow_nodata(int *nrequested, int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize);
!
! void *grow_withtail(int *nrequested, int *nexisting, char **startp,
! int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize);
!
! void *grow_withdata(int *nrequested, int *nexisting,
! int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize);
!
! /* Usually a preallocation method is used, except in special cases of:
! 1) reentrant output request, or 2) an output request which would cause
! resizing to more than MAXSIZE (no such limit for a 'set' message).
! In both special cases, a temporary output buffer is allocated.
! A separately preallocated output buffer is not used, thus avoiding
! memcpying of the stored message (a small performance gain when the
! preallocation method is chosen). Instead, self-invoked 'set'
! messages are postponed, using an auxiliary buffer.
! */
!
! static void prepend_dooutput(t_prepend *x, t_symbol *s, int ac, t_atom *av)
! {
! if (s == &s_float)
! {
! if (ac > 1)
! outlet_list(((t_object *)x)->ob_outlet, &s_list, ac, av);
! else
! outlet_float(((t_object *)x)->ob_outlet, av->a_w.w_float);
! }
! else if (s == &s_list)
! outlet_list(((t_object *)x)->ob_outlet, &s_list, ac, av);
! else if (s)
! /* CHECKED: 'bang' is prepended -- we cannot do so...
! ('symbol' cannot be compatible too) */
! {
! outlet_anything(((t_object *)x)->ob_outlet, s, ac, av);
! }
! }
!
! static void prepend_anything(t_prepend *x, t_symbol *s, int ac, t_atom *av)
! {
! int reentered = x->x_entered;
! int prealloc = !reentered;
! int ntotal = x->x_natoms + ac;
! t_atom *buf;
! x->x_entered = 1;
! if (s == &s_) s = 0;
! if (s)
! ntotal++;
! if (prealloc && ntotal > x->x_size)
! {
! if (ntotal > PREPEND_MAXSIZE)
! prealloc = 0;
! else
! {
! int nrequested = ntotal;
! x->x_message = grow_withdata(&nrequested, &x->x_natoms,
! &x->x_size, x->x_message,
! PREPEND_INISIZE, x->x_messini,
! sizeof(*x->x_message));
! prealloc = (nrequested == ntotal);
! }
! }
! if (prealloc)
! {
! buf = x->x_message + x->x_natoms;
! if (s)
! {
! SETSYMBOL(buf, s);
! buf++;
! }
! if (ac)
! memcpy(buf, av, ac * sizeof(*buf));
! prepend_dooutput(x, x->x_selector, ntotal, x->x_message);
! }
! else
! {
! /* LATER consider using the stack if ntotal <= MAXSTACK */
! if (buf = getbytes(ntotal * sizeof(*buf)))
! {
! t_atom *bp = buf + x->x_natoms;
! if (x->x_natoms)
! memcpy(buf, x->x_message, x->x_natoms * sizeof(*buf));
! if (s)
! {
! SETSYMBOL(bp, s);
! bp++;
! }
! if (ac)
! memcpy(bp, av, ac * sizeof(*bp));
! prepend_dooutput(x, x->x_selector, ntotal, buf);
! freebytes(buf, ntotal * sizeof(*buf));
! }
! }
! if (!reentered)
! {
! x->x_entered = 0;
! if (x->x_auxbuf)
! {
! if (x->x_auxsize <= x->x_size)
! {
! x->x_natoms = x->x_auxsize / 2;
! memcpy(x->x_message, x->x_auxbuf,
! x->x_natoms * sizeof(*x->x_message));
! freebytes(x->x_auxbuf, x->x_auxsize * sizeof(*x->x_auxbuf));
! }
! else
! {
! if (x->x_message != x->x_messini)
! freebytes(x->x_message, x->x_size * sizeof(*x->x_message));
! x->x_size = x->x_auxsize;
! x->x_message = x->x_auxbuf;
! x->x_natoms = x->x_auxsize / 2;
! }
! x->x_auxbuf = 0;
! }
! }
! }
!
! static void prepend_bang(t_prepend *x)
! {
! t_atom at;
! SETSYMBOL(&at, &s_bang); /* CHECKED */
! prepend_anything(x, 0, 1, &at);
! }
!
! static void prepend_float(t_prepend *x, t_float f)
! {
! t_atom at;
! SETFLOAT(&at, f);
! prepend_anything(x, 0, 1, &at);
! }
!
! static void prepend_symbol(t_prepend *x, t_symbol *s)
! {
! t_atom at;
! SETSYMBOL(&at, s);
! prepend_anything(x, 0, 1, &at);
! }
!
! /* LATER gpointer */
!
! static void prepend_list(t_prepend *x, t_symbol *s, int ac, t_atom *av)
! {
! prepend_anything(x, 0, ac, av);
! }
!
! static void prepend_set(t_prepend *x, t_symbol *s, int ac, t_atom *av)
! {
! if (ac)
! {
! int newsize;
! if (av->a_type == A_FLOAT)
! {
! if (ac > 1) x->x_selector = &s_list;
! else x->x_selector = &s_float;
! }
! else if (av->a_type == A_SYMBOL)
! {
! x->x_selector = av->a_w.w_symbol;
! ac--;
! av++;
! }
! else
! return; /* LATER rethink */
! newsize = ac * 2;
! if (x->x_entered)
! {
! if (x->x_auxbuf)
! {
! freebytes(x->x_auxbuf, x->x_auxsize * sizeof(*x->x_auxbuf));
! x->x_auxsize = 0;
! }
! if (x->x_auxbuf = getbytes(newsize * sizeof(*x->x_auxbuf)))
! {
! memcpy(x->x_auxbuf, av, ac * sizeof(*x->x_auxbuf));
! x->x_auxsize = newsize;
! }
! }
! else
! {
! t_atom *ap;
! if (newsize > x->x_size)
! {
! int sz = newsize;
! x->x_message = grow_nodata(&sz, &x->x_size, x->x_message,
! PREPEND_INISIZE, x->x_messini,
! sizeof(*x->x_message));
! if (sz != newsize)
! ac = sz / 2; /* LATER rethink */
! }
! x->x_natoms = ac;
! ap = x->x_message;
! while (ac--) *ap++ = *av++;
! }
! }
! }
!
! static void prepend_free(t_prepend *x)
! {
! if (x->x_message != x->x_messini)
! freebytes(x->x_message, x->x_size * sizeof(*x->x_message));
! }
!
! static void *prepend_new(t_symbol *s, int ac, t_atom *av)
! {
! t_prepend *x = (t_prepend *)pd_new(prepend_class);
! x->x_selector = 0;
! x->x_size = PREPEND_INISIZE;
! x->x_natoms = 0;
! x->x_message = x->x_messini;
! x->x_auxbuf = 0;
! x->x_entered = 0;
! outlet_new((t_object *)x, &s_anything);
! prepend_set(x, 0, ac, av);
! return (x);
! }
!
! void prepend_setup(void)
! {
! prepend_class = class_new(gensym("prepend"),
! (t_newmethod)prepend_new,
! (t_method)prepend_free,
! sizeof(t_prepend), 0,
! A_GIMME, 0);
! class_addbang(prepend_class, prepend_bang);
! class_addfloat(prepend_class, prepend_float);
! class_addsymbol(prepend_class, prepend_symbol);
! class_addlist(prepend_class, prepend_list);
! class_addanything(prepend_class, prepend_anything);
! class_addmethod(prepend_class, (t_method)prepend_set,
! gensym("set"), A_GIMME, 0);
! }
!
!
! /* Prior to this call a caller is supposed to check for *nrequested > *sizep.
! Returns a reallocated buffer's pointer (success) or a given 'bufini'
! default value (failure).
! Upon return *nrequested contains the actual number of elements:
! requested (success) or a given default value of 'inisize' (failure). */
! void *grow_nodata(int *nrequested, int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize)
! {
! int newsize = *sizep * 2;
! while (newsize < *nrequested) newsize *= 2;
! if (bufp == bufini)
! bufp = getbytes(newsize * typesize);
! else
! bufp = resizebytes(bufp, *sizep * typesize, newsize * typesize);
! if (bufp)
! {
! *sizep = newsize;
! return (bufp);
! }
! else
! {
! *nrequested = *sizep = inisize;
! return (bufini);
! }
! }
!
! /* Like grow_nodata(), but preserving first *nexisting elements. */
! void *grow_withdata(int *nrequested, int *nexisting,
! int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize)
! {
! int newsize = *sizep * 2;
! while (newsize < *nrequested) newsize *= 2;
! if (bufp == bufini)
! {
! if (!(bufp = getbytes(newsize * typesize)))
! {
! *nrequested = *sizep = inisize;
! return (bufini);
! }
! *sizep = newsize;
! memcpy(bufp, bufini, *nexisting * typesize);
! }
! else
! {
! int oldsize = *sizep;
! if (!(bufp = resizebytes(bufp, *sizep * typesize, newsize * typesize)))
! {
! *nrequested = *sizep = inisize;
! *nexisting = 0;
! return (bufini);
! }
! *sizep = newsize;
! }
! return (bufp);
! }
!
! /* Like grow_nodata(), but preserving a 'tail' of *nexisting elements,
! starting from *startp. */
! /* LATER rethink handling of a start pointer (clumsy now) */
! void *grow_withtail(int *nrequested, int *nexisting, char **startp,
! int *sizep, void *bufp,
! int inisize, void *bufini, size_t typesize)
! {
! int newsize = *sizep * 2;
! while (newsize < *nrequested) newsize *= 2;
! if (bufp == bufini)
! {
! char *oldstart = *startp;
! if (!(bufp = getbytes(newsize * typesize)))
! {
! *nrequested = *sizep = inisize;
! return (bufini);
! }
! *startp = (char *)bufp + (newsize - *nexisting) * typesize;
! *sizep = newsize;
! memcpy(*startp, oldstart, *nexisting * typesize);
! }
! else
! {
! int oldsize = *sizep;
! if (!(bufp = resizebytes(bufp, *sizep * typesize, newsize * typesize)))
! {
! *startp = (char *)bufini + inisize * typesize;
! *nrequested = *sizep = inisize;
! *nexisting = 0;
! return (bufini);
! }
! *startp = (char *)bufp + (newsize - *nexisting) * typesize;
! *sizep = newsize;
! memmove(*startp, (char *)bufp + (oldsize - *nexisting) * typesize,
! *nexisting * typesize);
! }
! return (bufp);
! }
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