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pmc_freeze.c
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pmc_freeze.c
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/*
Copyright (C) 2001-2009, Parrot Foundation.
$Id$
=head1 NAME
src/pmc_freeze.c - Freeze and thaw functionality
=head1 DESCRIPTION
Freeze uses the C<next_for_GC pointer()> to remember seen PMCs. PMCs are
written as IDs (or tags), which are calculated from their arena address.
This PMC number is multiplied by four. The 2 low bits indicate a seen
PMC or a PMC of the same type as the previous one respectively.
Thawing PMCs uses a list with (maximum) size of the amount of PMCs to
keep track of retrieved PMCs.
The individual information of PMCs is frozen/thawed by their vtables.
To avoid recursion, the whole functionality is driven by
C<< pmc->vtable->visit >>, which is called for the first PMC initially.
Container PMCs call a "todo-callback" for all contained PMCs. The
individual action vtable (freeze/thaw) is then called for all todo-PMCs.
In the current implementation C<IMAGE_IO> is a stand-in for some kind of
serializer PMC which will eventually be written. It associates a Parrot
C<STRING> with a vtable.
=cut
*/
#include "parrot/parrot.h"
#include "pmc_freeze.str"
/* HEADERIZER HFILE: include/parrot/pmc_freeze.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void add_pmc_next_for_GC(SHIM_INTERP,
ARGIN(PMC *pmc),
ARGOUT(visit_info *info))
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*info);
static void add_pmc_todo_list(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
ARGIN(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
static void create_image(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
ARGMOD(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(3)
FUNC_MODIFIES(*info);
PARROT_INLINE
static void do_action(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
ARGIN(visit_info *info),
int seen,
UINTVAL id)
__attribute__nonnull__(1)
__attribute__nonnull__(3);
PARROT_INLINE
static void do_thaw(PARROT_INTERP,
ARGIN_NULLOK(PMC* pmc),
ARGIN(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
PARROT_INLINE
static void freeze_pmc(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
ARGIN(visit_info *info),
int seen,
UINTVAL id)
__attribute__nonnull__(1)
__attribute__nonnull__(3);
static void ft_init(PARROT_INTERP, ARGIN(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static UINTVAL id_from_pmc(PARROT_INTERP, ARGIN(PMC* pmc))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_INLINE
static int next_for_GC_seen(PARROT_INTERP,
ARGIN_NULLOK(PMC *pmc),
ARGIN(visit_info *info),
ARGOUT(UINTVAL *id))
__attribute__nonnull__(1)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*id);
static void op_append(PARROT_INTERP,
ARGIN(STRING *s),
opcode_t b,
size_t len)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_INLINE
static void op_check_size(PARROT_INTERP, ARGIN(STRING *s), size_t len)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void pmc_add_ext(PARROT_INTERP, ARGIN(PMC *pmc))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void push_ascii_integer(PARROT_INTERP, ARGIN(IMAGE_IO *io), INTVAL v)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void push_ascii_number(PARROT_INTERP,
ARGIN(const IMAGE_IO *io),
FLOATVAL v)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void push_ascii_pmc(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
ARGIN(const PMC* v))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void push_ascii_string(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
ARGIN(const STRING *s))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void push_opcode_integer(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
INTVAL v)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void push_opcode_number(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
FLOATVAL v)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void push_opcode_pmc(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
ARGIN(PMC* v))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void push_opcode_string(PARROT_INTERP,
ARGIN(IMAGE_IO *io),
ARGIN(STRING *v))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* run_thaw(PARROT_INTERP,
ARGIN(STRING* image),
visit_enum_type what)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static INTVAL shift_ascii_integer(SHIM_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(2);
static FLOATVAL shift_ascii_number(SHIM_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* shift_ascii_pmc(SHIM_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static STRING* shift_ascii_string(PARROT_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static INTVAL shift_opcode_integer(SHIM_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(2);
static FLOATVAL shift_opcode_number(SHIM_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* shift_opcode_pmc(PARROT_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING* shift_opcode_string(PARROT_INTERP, ARGIN(IMAGE_IO *io))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
static void str_append(PARROT_INTERP,
ARGMOD(STRING *s),
ARGIN(const void *b),
size_t len)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*s);
PARROT_INLINE
PARROT_CANNOT_RETURN_NULL
static PMC* thaw_create_pmc(PARROT_INTERP,
ARGIN(const visit_info *info),
INTVAL type)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_INLINE
static int thaw_pmc(PARROT_INTERP,
ARGMOD(visit_info *info),
ARGOUT(UINTVAL *id),
ARGOUT(INTVAL *type))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*info)
FUNC_MODIFIES(*id)
FUNC_MODIFIES(*type);
static void todo_list_init(PARROT_INTERP, ARGOUT(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*info);
PARROT_INLINE
static int todo_list_seen(PARROT_INTERP,
ARGIN(PMC *pmc),
ARGMOD(visit_info *info),
ARGOUT(UINTVAL *id))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*info)
FUNC_MODIFIES(*id);
static void visit_loop_next_for_GC(PARROT_INTERP,
ARGIN(PMC *current),
ARGIN(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void visit_loop_todo_list(PARROT_INTERP,
ARGIN_NULLOK(PMC *current),
ARGIN(visit_info *info))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
static void visit_next_for_GC(PARROT_INTERP,
ARGIN(PMC* pmc),
ARGIN(visit_info* info))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void visit_todo_list(PARROT_INTERP,
ARGIN_NULLOK(PMC* pmc),
ARGIN(visit_info* info))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
static void visit_todo_list_thaw(PARROT_INTERP,
ARGIN_NULLOK(PMC* old),
ARGIN(visit_info* info))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
#define ASSERT_ARGS_add_pmc_next_for_GC __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(pmc) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_add_pmc_todo_list __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_create_image __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_do_action __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_do_thaw __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_freeze_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_ft_init __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_id_from_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(pmc)
#define ASSERT_ARGS_next_for_GC_seen __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info) \
|| PARROT_ASSERT_ARG(id)
#define ASSERT_ARGS_op_append __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(s)
#define ASSERT_ARGS_op_check_size __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(s)
#define ASSERT_ARGS_pmc_add_ext __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(pmc)
#define ASSERT_ARGS_push_ascii_integer __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_push_ascii_number __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_push_ascii_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io) \
|| PARROT_ASSERT_ARG(v)
#define ASSERT_ARGS_push_ascii_string __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io) \
|| PARROT_ASSERT_ARG(s)
#define ASSERT_ARGS_push_opcode_integer __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_push_opcode_number __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_push_opcode_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io) \
|| PARROT_ASSERT_ARG(v)
#define ASSERT_ARGS_push_opcode_string __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io) \
|| PARROT_ASSERT_ARG(v)
#define ASSERT_ARGS_run_thaw __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(image)
#define ASSERT_ARGS_shift_ascii_integer __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_ascii_number __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_ascii_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_ascii_string __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_opcode_integer __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_opcode_number __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_opcode_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_shift_opcode_string __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(io)
#define ASSERT_ARGS_str_append __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(s) \
|| PARROT_ASSERT_ARG(b)
#define ASSERT_ARGS_thaw_create_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_thaw_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info) \
|| PARROT_ASSERT_ARG(id) \
|| PARROT_ASSERT_ARG(type)
#define ASSERT_ARGS_todo_list_init __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_todo_list_seen __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(pmc) \
|| PARROT_ASSERT_ARG(info) \
|| PARROT_ASSERT_ARG(id)
#define ASSERT_ARGS_visit_loop_next_for_GC __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(current) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_visit_loop_todo_list __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_visit_next_for_GC __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(pmc) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_visit_todo_list __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
#define ASSERT_ARGS_visit_todo_list_thaw __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(info)
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
* define this to 1 for testing. TODO: 1 is broken.
*/
#ifndef FREEZE_ASCII
# define FREEZE_ASCII 0
#endif
/* normal freeze can use next_for_GC ptrs or a seen hash */
#define FREEZE_USE_NEXT_FOR_GC 0
/* when thawing a string longer then this size, we first do a GC run and then
* block GC - the system can't give us more headers */
#define THAW_BLOCK_GC_SIZE 100000
/* preallocate freeze image for aggregates with this estimation */
#if FREEZE_ASCII
# define FREEZE_BYTES_PER_ITEM 17
#else
# define FREEZE_BYTES_PER_ITEM 9
#endif
/*
=head2 Image Stream Functions
=over 4
=item C<static void str_append(PARROT_INTERP, STRING *s, const void *b, size_t
len)>
Appends C<len> bytes from buffer C<*b> to string C<*s>.
Plain ascii - for testing only:
For speed reasons we mess around with the string buffers directly.
No encoding of strings, no transcoding.
=cut
*/
static void
str_append(PARROT_INTERP, ARGMOD(STRING *s), ARGIN(const void *b), size_t len)
{
ASSERT_ARGS(str_append)
const size_t used = s->bufused;
const int need_free = (int)PObj_buflen(s) - used - len;
/*
* grow by factor 1.5 or such
*/
if (need_free <= 16) {
size_t new_size = (size_t) (PObj_buflen(s) * 1.5);
if (new_size < PObj_buflen(s) - need_free + 512)
new_size = PObj_buflen(s) - need_free + 512;
Parrot_gc_reallocate_string_storage(interp, s, new_size);
PARROT_ASSERT(PObj_buflen(s) - used - len >= 15);
}
mem_sys_memcopy((void *)((ptrcast_t)s->strstart + used), b, len);
s->bufused += len;
s->strlen += len;
}
/*
=item C<static void push_ascii_integer(PARROT_INTERP, IMAGE_IO *io, INTVAL v)>
Pushes an ASCII version of the integer C<v> onto the end of the C<*io>
"stream".
=cut
*/
static void
push_ascii_integer(PARROT_INTERP, ARGIN(IMAGE_IO *io), INTVAL v)
{
ASSERT_ARGS(push_ascii_integer)
char buffer[20];
const size_t len = snprintf(buffer, sizeof (buffer), "%d ", (int) v);
str_append(interp, io->image, buffer, len);
}
/*
=item C<static void push_ascii_number(PARROT_INTERP, const IMAGE_IO *io,
FLOATVAL v)>
Pushes an ASCII version of the number C<v> onto the end of the C<*io>
"stream".
=cut
*/
static void
push_ascii_number(PARROT_INTERP, ARGIN(const IMAGE_IO *io), FLOATVAL v)
{
ASSERT_ARGS(push_ascii_number)
char buffer[40];
const size_t len = snprintf(buffer, sizeof (buffer), "%g ", (double) v);
str_append(interp, io->image, buffer, len);
}
/*
=item C<static void push_ascii_string(PARROT_INTERP, IMAGE_IO *io, const STRING
*s)>
Pushes an ASCII version of the string C<*s> onto the end of the C<*io>
"stream".
For testing only - no encodings and such.
XXX no string delimiters - so no space allowed.
=cut
*/
static void
push_ascii_string(PARROT_INTERP, ARGIN(IMAGE_IO *io), ARGIN(const STRING *s))
{
ASSERT_ARGS(push_ascii_string)
const UINTVAL length = Parrot_str_byte_length(interp, s);
char * const buffer = (char *)malloc(4*length); /* XXX Why 4? What does that mean? */
char *cursor = buffer;
UINTVAL idx = 0;
/* temporary--write out in UTF-8 */
for (idx = 0; idx < length; ++idx) {
*cursor++ = (unsigned char)Parrot_str_indexed(interp, s, idx);
}
str_append(interp, io->image, buffer, cursor - buffer);
str_append(interp, io->image, " ", 1);
mem_sys_free(buffer);
}
/*
=item C<static void push_ascii_pmc(PARROT_INTERP, IMAGE_IO *io, const PMC* v)>
Pushes an ASCII version of the PMC C<*v> onto the end of the C<*io>
"stream".
=cut
*/
static void
push_ascii_pmc(PARROT_INTERP, ARGIN(IMAGE_IO *io), ARGIN(const PMC* v))
{
ASSERT_ARGS(push_ascii_pmc)
char buffer[20];
const size_t len = snprintf(buffer, sizeof (buffer), "%p ", (const void *)v);
str_append(interp, io->image, buffer, len);
}
/*
=item C<static INTVAL shift_ascii_integer(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an integer from the start of the C<*io> "stream".
=cut
*/
static INTVAL
shift_ascii_integer(SHIM_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_ascii_integer)
char * const start = (char*)io->image->strstart;
char *p = start;
const INTVAL i = strtoul(p, &p, 10);
++p;
PARROT_ASSERT(p <= start + io->image->bufused);
io->image->strstart = p;
io->image->bufused -= (p - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return i;
}
/*
=item C<static FLOATVAL shift_ascii_number(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an number from the start of the C<*io> "stream".
=cut
*/
static FLOATVAL
shift_ascii_number(SHIM_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_ascii_number)
char * const start = (char*)io->image->strstart;
char *p = start;
const FLOATVAL f = (FLOATVAL) strtod(p, &p);
++p;
PARROT_ASSERT(p <= start + io->image->bufused);
io->image->strstart = p;
io->image->bufused -= (p - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return f;
}
/*
=item C<static STRING* shift_ascii_string(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an string from the start of the C<*io> "stream".
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static STRING*
shift_ascii_string(PARROT_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_ascii_string)
STRING *s;
char * const start = (char*)io->image->strstart;
char *p = start;
while (*p != ' ')
++p;
++p;
PARROT_ASSERT(p <= start + io->image->bufused);
io->image->strstart = p;
io->image->bufused -= (p - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
s = string_make(interp, start, p - start - 1, "iso-8859-1", 0);
/* s = string_make(interp, start, p - start - 1, "UTF-8", 0); */
return s;
}
/*
=item C<static PMC* shift_ascii_pmc(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns a PMC from the start of the C<*io> "stream".
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC*
shift_ascii_pmc(SHIM_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_ascii_pmc)
char * const start = (char*)io->image->strstart;
char *p = start;
const unsigned long i = strtoul(p, &p, 16);
++p;
PARROT_ASSERT(p <= start + io->image->bufused);
io->image->strstart = p;
io->image->bufused -= (p - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return (PMC*) i;
}
/*
=back
=head2 C<opcode_t> IO Functions
=over 4
=item C<static void op_check_size(PARROT_INTERP, STRING *s, size_t len)>
Checks the size of the "stream" buffer to see if it can accommodate
C<len> more bytes. If not then the buffer is expanded.
=cut
*/
PARROT_INLINE
static void
op_check_size(PARROT_INTERP, ARGIN(STRING *s), size_t len)
{
ASSERT_ARGS(op_check_size)
const size_t used = s->bufused;
const int need_free = (int)PObj_buflen(s) - used - len;
/*
* grow by factor 1.5 or such
*/
if (need_free <= 16) {
size_t new_size = (size_t) (PObj_buflen(s) * 1.5);
if (new_size < PObj_buflen(s) - need_free + 512)
new_size = PObj_buflen(s) - need_free + 512;
Parrot_gc_reallocate_string_storage(interp, s, new_size);
PARROT_ASSERT(PObj_buflen(s) - used - len >= 15);
}
#ifndef DISABLE_GC_DEBUG
Parrot_gc_compact_memory_pool(interp);
#endif
}
/*
=item C<static void op_append(PARROT_INTERP, STRING *s, opcode_t b, size_t len)>
Appends the opcode C<b> to the string C<*s>.
=cut
*/
static void
op_append(PARROT_INTERP, ARGIN(STRING *s), opcode_t b, size_t len)
{
ASSERT_ARGS(op_append)
char *str_pos;
op_check_size(interp, s, len);
str_pos = s->strstart + s->bufused;
*((opcode_t *)(str_pos)) = b;
s->bufused += len;
s->strlen += len;
}
/*
=item C<static void push_opcode_integer(PARROT_INTERP, IMAGE_IO *io, INTVAL v)>
Pushes the integer C<v> onto the end of the C<*io> "stream".
XXX assumes sizeof (opcode_t) == sizeof (INTVAL).
=cut
*/
static void
push_opcode_integer(PARROT_INTERP, ARGIN(IMAGE_IO *io), INTVAL v)
{
ASSERT_ARGS(push_opcode_integer)
PARROT_ASSERT(sizeof (opcode_t) == sizeof (INTVAL));
op_append(interp, io->image, (opcode_t)v, sizeof (opcode_t));
}
/*
=item C<static void push_opcode_number(PARROT_INTERP, IMAGE_IO *io, FLOATVAL v)>
Pushes the number C<v> onto the end of the C<*io> "stream".
=cut
*/
static void
push_opcode_number(PARROT_INTERP, ARGIN(IMAGE_IO *io), FLOATVAL v)
{
ASSERT_ARGS(push_opcode_number)
const size_t len = PF_size_number() * sizeof (opcode_t);
STRING * const s = io->image;
const size_t used = s->bufused;
opcode_t *ignored;
op_check_size(interp, s, len);
ignored = PF_store_number((opcode_t *)((ptrcast_t)s->strstart + used), &v);
UNUSED(ignored);
s->bufused += len;
s->strlen += len;
}
/*
=item C<static void push_opcode_string(PARROT_INTERP, IMAGE_IO *io, STRING *v)>
Pushes the string C<*v> onto the end of the C<*io> "stream".
=cut
*/
static void
push_opcode_string(PARROT_INTERP, ARGIN(IMAGE_IO *io), ARGIN(STRING *v))
{
ASSERT_ARGS(push_opcode_string)
const size_t len = PF_size_string(v) * sizeof (opcode_t);
STRING * const s = io->image;
const size_t used = s->bufused;
opcode_t *ignored;
op_check_size(interp, s, len);
ignored = PF_store_string((opcode_t *)((ptrcast_t)s->strstart + used), v);
UNUSED(ignored);
s->bufused += len;
s->strlen += len;
}
/*
=item C<static void push_opcode_pmc(PARROT_INTERP, IMAGE_IO *io, PMC* v)>
Pushes the PMC C<*v> onto the end of the C<*io> "stream".
=cut
*/
static void
push_opcode_pmc(PARROT_INTERP, ARGIN(IMAGE_IO *io), ARGIN(PMC* v))
{
ASSERT_ARGS(push_opcode_pmc)
op_append(interp, io->image, (opcode_t)v, sizeof (opcode_t));
}
/*
=item C<static INTVAL shift_opcode_integer(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an integer from the start of the C<*io> "stream".
=cut
*/
static INTVAL
shift_opcode_integer(SHIM_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_opcode_integer)
const char * const start = (char *)io->image->strstart;
char **opcode = &io->image->strstart;
const INTVAL i = PF_fetch_integer(io->pf,
(const opcode_t **)opcode);
io->image->bufused -= ((char *)io->image->strstart - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return i;
}
/*
=item C<static PMC* shift_opcode_pmc(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an PMC from the start of the C<*io> "stream".
Note that this actually reads a PMC id, not a PMC.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC*
shift_opcode_pmc(PARROT_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_opcode_pmc)
INTVAL i = shift_opcode_integer(interp, io);
return (PMC *)i;
}
/*
=item C<static FLOATVAL shift_opcode_number(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns an number from the start of the C<*io> "stream".
=cut
*/
static FLOATVAL
shift_opcode_number(SHIM_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_opcode_number)
const char * const start = (const char *)io->image->strstart;
char **opcode = &io->image->strstart;
const FLOATVAL f = PF_fetch_number(io->pf,
(const opcode_t **)opcode);
io->image->bufused -= ((char *)io->image->strstart - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return f;
}
/*
=item C<static STRING* shift_opcode_string(PARROT_INTERP, IMAGE_IO *io)>
Removes and returns a string from the start of the C<*io> "stream".
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING*
shift_opcode_string(PARROT_INTERP, ARGIN(IMAGE_IO *io))
{
ASSERT_ARGS(shift_opcode_string)
char * const start = (char*)io->image->strstart;
char **opcode = &io->image->strstart;
STRING * const s = PF_fetch_string(interp, io->pf,
(const opcode_t **)opcode);
io->image->bufused -= ((char *)io->image->strstart - start);
PARROT_ASSERT((int)io->image->bufused >= 0);
return s;
}
/*
=back
=head2 Helper Functions
=over 4
=item C<static void pmc_add_ext(PARROT_INTERP, PMC *pmc)>
Adds a C<PMC_EXT> to C<*pmc>.
=cut
*/
static void
pmc_add_ext(PARROT_INTERP, ARGIN(PMC *pmc))
{
ASSERT_ARGS(pmc_add_ext)
if (pmc->vtable->flags & VTABLE_PMC_NEEDS_EXT)
Parrot_gc_add_pmc_ext(interp, pmc);
}
/*
* this function setup stuff may be replaced by a real PMC
* in the future
* TODO add read/write header functions, e.g. vtable->init_pmc
*/
#if FREEZE_ASCII
static image_funcs ascii_funcs = {
push_ascii_integer,
push_ascii_pmc,
push_ascii_string,
push_ascii_number,
shift_ascii_integer,
shift_ascii_pmc,
shift_ascii_string,
shift_ascii_number
};
#else
static image_funcs opcode_funcs = {
push_opcode_integer,
push_opcode_pmc,
push_opcode_string,
push_opcode_number,
shift_opcode_integer,
shift_opcode_pmc,
shift_opcode_string,
shift_opcode_number
};
#endif
/*
=item C<static void ft_init(PARROT_INTERP, visit_info *info)>