/* $Id: Parser.xs,v 1.1 2004/04/09 17:04:44 dasenbro Exp $
*
* Copyright 1999-2001, Gisle Aas.
* Copyright 1999-2000, Michael A. Chase.
*
* This library is free software; you can redistribute it and/or
* modify it under the same terms as Perl itself.
*/
/*
* Standard XS greeting.
*/
#ifdef __cplusplus
extern "C" {
#endif
#define PERL_NO_GET_CONTEXT /* we want efficiency */
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef __cplusplus
}
#endif
/*
* Some perl version compatibility gruff.
*/
#include "patchlevel.h"
#if PATCHLEVEL <= 4 /* perl5.004_XX */
#ifndef PL_sv_undef
#define PL_sv_undef sv_undef
#define PL_sv_yes sv_yes
#endif
#ifndef PL_hexdigit
#define PL_hexdigit hexdigit
#endif
#ifndef ERRSV
#define ERRSV GvSV(errgv)
#endif
#if (PATCHLEVEL == 4 && SUBVERSION <= 4)
/* The newSVpvn function was introduced in perl5.004_05 */
static SV *
newSVpvn(char *s, STRLEN len)
{
register SV *sv = newSV(0);
sv_setpvn(sv,s,len);
return sv;
}
#endif /* not perl5.004_05 */
#endif /* perl5.004_XX */
#ifndef dNOOP
#define dNOOP extern int errno
#endif
#ifndef dTHX
#define dTHX dNOOP
#define pTHX_
#define aTHX_
#endif
#ifndef MEMBER_TO_FPTR
#define MEMBER_TO_FPTR(x) (x)
#endif
#ifndef INT2PTR
#define INT2PTR(any,d) (any)(d)
#define PTR2IV(p) (IV)(p)
#endif
#if PATCHLEVEL > 6 || (PATCHLEVEL == 6 && SUBVERSION > 0)
#define RETHROW croak(Nullch)
#else
#define RETHROW { STRLEN my_na; croak("%s", SvPV(ERRSV, my_na)); }
#endif
/*
* Include stuff. We include .c files instead of linking them,
* so that they don't have to pollute the external dll name space.
*/
#ifdef EXTERN
#undef EXTERN
#endif
#define EXTERN static /* Don't pollute */
#include "hparser.h"
#include "util.c"
#include "hparser.c"
/*
* Support functions for the XS glue
*/
static SV*
check_handler(pTHX_ SV* h)
{
if (SvROK(h)) {
SV* myref = SvRV(h);
if (SvTYPE(myref) == SVt_PVCV)
return newSVsv(h);
if (SvTYPE(myref) == SVt_PVAV)
return SvREFCNT_inc(myref);
croak("Only code or array references allowed as handler");
}
return SvOK(h) ? newSVsv(h) : 0;
}
static PSTATE*
get_pstate_iv(pTHX_ SV* sv)
{
PSTATE* p = INT2PTR(PSTATE*, SvIV(sv));
if (p->signature != P_SIGNATURE)
croak("Bad signature in parser state object at %p", p);
return p;
}
static PSTATE*
get_pstate_hv(pTHX_ SV* sv) /* used by XS typemap */
{
HV* hv;
SV** svp;
sv = SvRV(sv);
if (!sv || SvTYPE(sv) != SVt_PVHV)
croak("Not a reference to a hash");
hv = (HV*)sv;
svp = hv_fetch(hv, "_hparser_xs_state", 17, 0);
if (svp) {
if (SvROK(*svp))
return get_pstate_iv(aTHX_ SvRV(*svp));
else
croak("_hparser_xs_state element is not a reference");
}
croak("Can't find '_hparser_xs_state' element in HTML::Parser hash");
return 0;
}
static void
free_pstate(pTHX_ PSTATE* pstate)
{
int i;
SvREFCNT_dec(pstate->buf);
SvREFCNT_dec(pstate->pend_text);
SvREFCNT_dec(pstate->skipped_text);
#ifdef MARKED_SECTION
SvREFCNT_dec(pstate->ms_stack);
#endif
SvREFCNT_dec(pstate->bool_attr_val);
for (i = 0; i < EVENT_COUNT; i++) {
SvREFCNT_dec(pstate->handlers[i].cb);
SvREFCNT_dec(pstate->handlers[i].argspec);
}
SvREFCNT_dec(pstate->report_tags);
SvREFCNT_dec(pstate->ignore_tags);
SvREFCNT_dec(pstate->ignore_elements);
SvREFCNT_dec(pstate->ignoring_element);
SvREFCNT_dec(pstate->tmp);
pstate->signature = 0;
Safefree(pstate);
}
static int
magic_free_pstate(pTHX_ SV *sv, MAGIC *mg)
{
free_pstate(aTHX_ get_pstate_iv(aTHX_ sv));
return 0;
}
MGVTBL vtbl_free_pstate = {0, 0, 0, 0, MEMBER_TO_FPTR(magic_free_pstate)};
/*
* XS interface definition.
*/
MODULE = HTML::Parser PACKAGE = HTML::Parser
PROTOTYPES: DISABLE
void
_alloc_pstate(self)
SV* self;
PREINIT:
PSTATE* pstate;
SV* sv;
HV* hv;
MAGIC* mg;
CODE:
sv = SvRV(self);
if (!sv || SvTYPE(sv) != SVt_PVHV)
croak("Not a reference to a hash");
hv = (HV*)sv;
Newz(56, pstate, 1, PSTATE);
pstate->signature = P_SIGNATURE;
pstate->entity2char = perl_get_hv("HTML::Entities::entity2char", TRUE);
pstate->tmp = NEWSV(0, 20);
sv = newSViv(PTR2IV(pstate));
sv_magic(sv, 0, '~', 0, 0);
mg = mg_find(sv, '~');
assert(mg);
mg->mg_virtual = &vtbl_free_pstate;
SvREADONLY_on(sv);
hv_store(hv, "_hparser_xs_state", 17, newRV_noinc(sv), 0);
void
parse(self, chunk)
SV* self;
SV* chunk
PREINIT:
PSTATE* p_state = get_pstate_hv(aTHX_ self);
PPCODE:
if (p_state->parsing)
croak("Parse loop not allowed");
p_state->parsing = 1;
if (SvROK(chunk) && SvTYPE(SvRV(chunk)) == SVt_PVCV) {
SV* generator = chunk;
STRLEN len;
do {
int count;
PUSHMARK(SP);
count = perl_call_sv(generator, G_SCALAR|G_EVAL);
SPAGAIN;
chunk = count ? POPs : 0;
if (SvTRUE(ERRSV)) {
p_state->parsing = 0;
p_state->eof = 0;
RETHROW;
}
if (chunk && SvOK(chunk)) {
(void)SvPV(chunk, len); /* get length */
}
else {
len = 0;
}
parse(aTHX_ p_state, len ? chunk : 0, self);
SPAGAIN;
} while (len && !p_state->eof);
}
else {
parse(aTHX_ p_state, chunk, self);
SPAGAIN;
}
p_state->parsing = 0;
if (p_state->eof) {
p_state->eof = 0;
PUSHs(sv_newmortal());
}
else {
PUSHs(self);
}
void
eof(self)
SV* self;
PREINIT:
PSTATE* p_state = get_pstate_hv(aTHX_ self);
PPCODE:
if (p_state->parsing)
p_state->eof = 1;
else {
p_state->parsing = 1;
parse(aTHX_ p_state, 0, self); /* flush */
p_state->parsing = 0;
}
PUSHs(self);
SV*
strict_comment(pstate,...)
PSTATE* pstate
ALIAS:
HTML::Parser::strict_comment = 1
HTML::Parser::strict_names = 2
HTML::Parser::xml_mode = 3
HTML::Parser::unbroken_text = 4
HTML::Parser::marked_sections = 5
HTML::Parser::attr_encoded = 6
HTML::Parser::case_sensitive = 7
HTML::Parser::strict_end = 8
PREINIT:
bool *attr;
CODE:
switch (ix) {
case 1: attr = &pstate->strict_comment; break;
case 2: attr = &pstate->strict_names; break;
case 3: attr = &pstate->xml_mode; break;
case 4: attr = &pstate->unbroken_text; break;
case 5:
#ifdef MARKED_SECTION
attr = &pstate->marked_sections; break;
#else
croak("marked sections not supported"); break;
#endif
case 6: attr = &pstate->attr_encoded; break;
case 7: attr = &pstate->case_sensitive; break;
case 8: attr = &pstate->strict_end; break;
default:
croak("Unknown boolean attribute (%d)", ix);
}
RETVAL = boolSV(*attr);
if (items > 1)
*attr = SvTRUE(ST(1));
OUTPUT:
RETVAL
SV*
boolean_attribute_value(pstate,...)
PSTATE* pstate
CODE:
RETVAL = pstate->bool_attr_val ? newSVsv(pstate->bool_attr_val)
: &PL_sv_undef;
if (items > 1) {
SvREFCNT_dec(pstate->bool_attr_val);
pstate->bool_attr_val = newSVsv(ST(1));
}
OUTPUT:
RETVAL
void
ignore_tags(pstate,...)
PSTATE* pstate
ALIAS:
HTML::Parser::report_tags = 1
HTML::Parser::ignore_tags = 2
HTML::Parser::ignore_elements = 3
PREINIT:
HV** attr;
int i;
CODE:
switch (ix) {
case 1: attr = &pstate->report_tags; break;
case 2: attr = &pstate->ignore_tags; break;
case 3: attr = &pstate->ignore_elements; break;
default:
croak("Unknown tag-list attribute (%d)", ix);
}
if (GIMME_V != G_VOID)
croak("Can't report tag lists yet");
items--; /* pstate */
if (items) {
if (*attr)
hv_clear(*attr);
else
*attr = newHV();
for (i = 0; i < items; i++) {
SV* sv = ST(i+1);
if (SvROK(sv)) {
sv = SvRV(sv);
if (SvTYPE(sv) == SVt_PVAV) {
AV* av = (AV*)sv;
STRLEN j;
STRLEN len = av_len(av) + 1;
for (j = 0; j < len; j++) {
SV**svp = av_fetch(av, j, 0);
if (svp) {
hv_store_ent(*attr, *svp, newSViv(0), 0);
}
}
}
else
croak("Tag list must be plain scalars and arrays");
}
else {
hv_store_ent(*attr, sv, newSViv(0), 0);
}
}
}
else if (*attr) {
SvREFCNT_dec(*attr);
*attr = 0;
}
void
handler(pstate, eventname,...)
PSTATE* pstate
SV* eventname
PREINIT:
SV* self = ST(0);
STRLEN name_len;
char *name = SvPV(eventname, name_len);
int event = -1;
int i;
struct p_handler *h;
PPCODE:
/* map event name string to event_id */
for (i = 0; i < EVENT_COUNT; i++) {
if (strEQ(name, event_id_str[i])) {
event = i;
break;
}
}
if (event < 0)
croak("No handler for %s events", name);
h = &pstate->handlers[event];
/* set up return value */
if (h->cb) {
PUSHs((SvTYPE(h->cb) == SVt_PVAV)
? sv_2mortal(newRV_inc(h->cb))
: sv_2mortal(newSVsv(h->cb)));
}
else {
PUSHs(&PL_sv_undef);
}
/* update */
if (items > 3) {
SvREFCNT_dec(h->argspec);
h->argspec = 0;
h->argspec = argspec_compile(ST(3), pstate);
}
if (items > 2) {
SvREFCNT_dec(h->cb);
h->cb = 0;
h->cb = check_handler(aTHX_ ST(2));
}
MODULE = HTML::Parser PACKAGE = HTML::Entities
void
decode_entities(...)
PREINIT:
int i;
HV *entity2char = perl_get_hv("HTML::Entities::entity2char", FALSE);
PPCODE:
if (GIMME_V == G_SCALAR && items > 1)
items = 1;
for (i = 0; i < items; i++) {
if (GIMME_V != G_VOID)
ST(i) = sv_2mortal(newSVsv(ST(i)));
else if (SvREADONLY(ST(i)))
croak("Can't inline decode readonly string");
decode_entities(aTHX_ ST(i), entity2char);
}
SP += items;
void
_decode_entities(string, entities)
SV* string
SV* entities
PREINIT:
HV* entities_hv;
CODE:
if (SvOK(entities)) {
if (SvROK(entities) && SvTYPE(SvRV(entities)) == SVt_PVHV) {
entities_hv = (HV*)SvRV(entities);
}
else {
croak("2nd argument must be hash reference");
}
}
else {
entities_hv = 0;
}
if (SvREADONLY(string))
croak("Can't inline decode readonly string");
decode_entities(aTHX_ string, entities_hv);
int
UNICODE_SUPPORT()
PROTOTYPE:
CODE:
#ifdef UNICODE_ENTITIES
RETVAL = 1;
#else
RETVAL = 0;
#endif
OUTPUT:
RETVAL
MODULE = HTML::Parser PACKAGE = HTML::Parser