/
spf_vtable.c
338 lines (273 loc) · 8.51 KB
/
spf_vtable.c
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/* spf_vtable.c
* Copyright: 2001-2003 The Perl Foundation. All Rights Reserved.
* CVS Info
* $Id$
* Overview:
* Implements the two families of functions Parrot_sprintf
* may use to retrieve arguments.
* Data Structure and Algorithms:
* History:
* When I was first working on this implementation of
* sprintf, I ran into a problem. I wanted to re-use the
* implementation for a Parrot bytecode-level sprintf, but
* that couldn't be done, since it used va_* directly. For
* a while I thought about generating two versions of the
* source with a Perl script, but that seemed like overkill.
* Eventually I came across this idea--pass in a specialized
* vtable with methods for extracting things from the arglist,
* whatever it happened to be. This is the result.
* Notes:
* In the future, it may be deemed desirable to similarly
* vtable-ize appending things to the string, allowing for
* faster PIO_printf &c, as well as a version that writes
* directly to a C string. However, at this point neither
* of those is needed.
* References: misc.h, misc.c, spf_render.c
*/
#define IN_SPF_SYSTEM
#include "parrot/parrot.h"
#include <stdarg.h>
/* VARARGS CORE */
static STRING *
getchr_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
/* char promoted to int */
char ch = (char)va_arg(*arg, int);
return string_make(interpreter, &ch, 1, NULL, 0, NULL);
}
static HUGEINTVAL
getint_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
switch (size) {
case SIZE_REG:
return (HUGEINTVAL)(int)va_arg(*arg, int);
case SIZE_SHORT:
/* "'short int' is promoted to 'int' when passed through '...'" */
return (HUGEINTVAL)(short)va_arg(*arg, int);
case SIZE_LONG:
return (HUGEINTVAL)(long)va_arg(*arg, long);
case SIZE_HUGE:
return (HUGEINTVAL)(HUGEINTVAL)
va_arg(*arg, HUGEINTVAL);
case SIZE_XVAL:
return (HUGEINTVAL)(INTVAL)va_arg(*arg, INTVAL);
case SIZE_OPCODE:
return (HUGEINTVAL)(opcode_t)va_arg(*arg, opcode_t);
case SIZE_PMC:{
PMC *pmc = (PMC *)va_arg(*arg, PMC *);
return (HUGEINTVAL)(INTVAL)
(VTABLE_get_integer(interpreter, pmc));
}
default:
PANIC("Invalid int type!");
return 0;
}
}
static UHUGEINTVAL
getuint_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
switch (size) {
case SIZE_REG:
return (UHUGEINTVAL)(unsigned int)
va_arg(*arg, unsigned int);
case SIZE_SHORT:
/* short int promoted HLAGHLAGHLAGH. See note above */
return (UHUGEINTVAL)(unsigned short)
va_arg(*arg, unsigned int);
case SIZE_LONG:
return (UHUGEINTVAL)(unsigned long)
va_arg(*arg, unsigned long);
case SIZE_HUGE:
return (UHUGEINTVAL)(UHUGEINTVAL)
va_arg(*arg, UHUGEINTVAL);
case SIZE_XVAL:
return (UHUGEINTVAL)(UINTVAL)va_arg(*arg, UINTVAL);
case SIZE_OPCODE:
return (UHUGEINTVAL)(opcode_t)va_arg(*arg, opcode_t);
case SIZE_PMC:{
PMC *pmc = (PMC *)va_arg(*arg, PMC *);
return (UHUGEINTVAL)(UINTVAL)
(VTABLE_get_integer(interpreter, pmc));
}
default:
PANIC("Invalid uint type!");
return 0;
}
}
static HUGEFLOATVAL
getfloat_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
switch (size) {
case SIZE_SHORT:
/* float is promoted to double */
return (HUGEFLOATVAL)(float)va_arg(*arg, double);
case SIZE_REG:
return (HUGEFLOATVAL)(double)va_arg(*arg, double);
case SIZE_HUGE:
return (HUGEFLOATVAL)(HUGEFLOATVAL)
va_arg(*arg, HUGEFLOATVAL);
case SIZE_XVAL:
return (HUGEFLOATVAL)(FLOATVAL)
va_arg(*arg, FLOATVAL);
case SIZE_PMC:{
PMC *pmc = (PMC *)va_arg(*arg, PMC *);
return (HUGEFLOATVAL)(VTABLE_get_number(interpreter, pmc));
}
default:
internal_exception(INVALID_CHARACTER,
"Internal sprintf doesn't recognize size %d for a float",
size);
return (HUGEFLOATVAL)0.0;
}
}
static STRING *
getstring_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
switch (size) {
case SIZE_REG:
{
char *cstr = (char *)va_arg(*arg, char *);
return cstr2pstr(cstr);
}
case SIZE_PSTR:
{
STRING *s = (STRING *)va_arg(*arg, STRING *);
return s ? s : cstr2pstr("(null)");
}
case SIZE_PMC:
{
PMC *pmc = (PMC *)va_arg(*arg, PMC *);
STRING *s = VTABLE_get_string(interpreter, pmc);
return s;
}
default:
internal_exception(INVALID_CHARACTER,
"Internal sprintf doesn't recognize size %d for a string",
size);
return NULL;
}
}
static void *
getptr_va(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
va_list *arg = (va_list *)(obj->data);
return (void *)va_arg(*arg, void *);
}
SPRINTF_OBJ va_core = {
NULL, 0, getchr_va, getint_va, getuint_va,
getfloat_va, getstring_va, getptr_va
};
/* PMC CORE */
static STRING *
getchr_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
STRING *s;
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
s = VTABLE_get_string(interpreter, tmp);
/* XXX string_copy like below? + adjusting bufused */
return string_make(interpreter, s->strstart, 1, 0, 0, 0);
}
static HUGEINTVAL
getint_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
HUGEINTVAL ret;
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
ret = (HUGEINTVAL)(VTABLE_get_integer(interpreter, tmp));
switch (size) {
case SIZE_SHORT:
ret = (HUGEINTVAL)(short)ret;
break;
/* case SIZE_REG: ret=(HUGEINTVAL)(int)ret; */
break;
case SIZE_LONG:
ret = (HUGEINTVAL)(long)ret;
default:
/* nothing */ ;
}
return ret;
}
static UHUGEINTVAL
getuint_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
UHUGEINTVAL ret;
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
ret = (UHUGEINTVAL)(VTABLE_get_integer(interpreter, tmp));
switch (size) {
case SIZE_SHORT:
ret = (UHUGEINTVAL)(unsigned short)ret;
break;
/* case SIZE_REG: * ret=(UHUGEINTVAL)(unsigned int)ret; * break; */
case SIZE_LONG:
ret = (UHUGEINTVAL)(unsigned long)ret;
default:
/* nothing */ ;
}
return ret;
}
static HUGEFLOATVAL
getfloat_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
HUGEFLOATVAL ret;
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
ret = (HUGEFLOATVAL)(VTABLE_get_number(interpreter, tmp));
switch (size) {
case SIZE_SHORT:
ret = (HUGEFLOATVAL)(float)ret;
break;
/* case SIZE_REG: * ret=(HUGEFLOATVAL)(double)ret; * break; */
default:
/* nothing */ ;
}
return ret;
}
static STRING *
getstring_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
STRING *s;
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
s = (STRING *)(VTABLE_get_string(interpreter, tmp));
return s;
}
static void *
getptr_pmc(struct Parrot_Interp *interpreter, INTVAL size, SPRINTF_OBJ *obj)
{
PMC *tmp = VTABLE_get_pmc_keyed_int(interpreter,
((PMC *)obj->data),
(obj->index));
obj->index++;
/* XXX correct? */
return (void *)(VTABLE_get_integer(interpreter, tmp));
}
SPRINTF_OBJ pmc_core = {
NULL, 0, getchr_pmc, getint_pmc, getuint_pmc,
getfloat_pmc, getstring_pmc, getptr_pmc
};
/*
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/