-
#include "mop.h"
-static void
-mop_deconstruct_variable_name(pTHX_ SV* const variable,
- const char** const var_name, STRLEN* const var_name_len,
- svtype* const type,
- const char** const type_name) {
-
-
- if(SvROK(variable) && SvTYPE(SvRV(variable)) == SVt_PVHV){
- /* e.g. variable = { type => "SCALAR", name => "foo" } */
- HV* const hv = (HV*)SvRV(variable);
- SV** svp;
- STRLEN len;
- const char* pv;
-
- svp = hv_fetchs(hv, "name", FALSE);
- if(!(svp && SvOK(*svp))){
- croak("You must pass a variable name");
- }
- *var_name = SvPV_const(*svp, len);
- *var_name_len = len;
- if(len < 1){
- croak("You must pass a variable name");
- }
-
- svp = hv_fetchs(hv, "type", FALSE);
- if(!(svp && SvOK(*svp))) {
- croak("You must pass a variable type");
- }
- pv = SvPV_nolen_const(*svp);
- if(strEQ(pv, "SCALAR")){
- *type = SVt_PV; /* for all the type of scalars */
- }
- else if(strEQ(pv, "ARRAY")){
- *type = SVt_PVAV;
- }
- else if(strEQ(pv, "HASH")){
- *type = SVt_PVHV;
- }
- else if(strEQ(pv, "CODE")){
- *type = SVt_PVCV;
- }
- else if(strEQ(pv, "GLOB")){
- *type = SVt_PVGV;
- }
- else if(strEQ(pv, "IO")){
- *type = SVt_PVIO;
- }
- else{
- croak("I do not recognize that type '%s'", pv);
- }
- *type_name = pv;
- }
- else {
- STRLEN len;
- const char* pv;
- /* e.g. variable = '$foo' */
- if(!SvOK(variable)) {
- croak("You must pass a variable name");
- }
- pv = SvPV_const(variable, len);
- if(len < 2){
- croak("You must pass a variable name including a sigil");
- }
-
- *var_name = pv + 1;
- *var_name_len = len - 1;
-
- switch(pv[0]){
- case '$':
- *type = SVt_PV; /* for all the types of scalars */
- *type_name = "SCALAR";
- break;
- case '@':
- *type = SVt_PVAV;
- *type_name = "ARRAY";
- break;
- case '%':
- *type = SVt_PVHV;
- *type_name = "HASH";
- break;
- case '&':
- *type = SVt_PVCV;
- *type_name = "CODE";
- break;
- case '*':
- *type = SVt_PVGV;
- *type_name = "GLOB";
- break;
- default:
- croak("I do not recognize that sigil '%c'", pv[0]);
- }
- }
-}
-
-static GV*
-mop_get_gv(pTHX_ SV* const self, svtype const type, const char* const var_name, I32 const var_name_len, I32 const flags){
- SV* package_name;
- STRLEN len;
- const char* pv;
-
- if(!(flags & ~GV_NOADD_MASK)){ /* for shortcut fetching */
- SV* const ns = mop_call0(aTHX_ self, mop_namespace);
- GV** gvp;
- if(!(SvROK(ns) && SvTYPE(SvRV(ns)) == SVt_PVHV)){
- croak("namespace() did not return a hash reference");
- }
- gvp = (GV**)hv_fetch((HV*)SvRV(ns), var_name, var_name_len, FALSE);
- if(gvp && isGV_with_GP(*gvp)){
- return *gvp;
- }
- }
-
- package_name = mop_call0(aTHX_ self, KEY_FOR(name));
-
- if(!SvOK(package_name)){
- croak("name() did not return a defined value");
- }
-
- pv = SvPV_const(package_name, len);
-
- return gv_fetchpvn_flags(Perl_form(aTHX_ "%s::%s", pv, var_name), (len + var_name_len + 2), flags, type);
-}
-
-static SV*
-mop_gv_elem(pTHX_ GV* const gv, svtype const type, I32 const add){
- SV* sv;
-
- if(!gv){
- return NULL;
- }
-
- assert(isGV_with_GP(gv));
-
- switch(type){
- case SVt_PVAV:
- sv = (SV*)(add ? GvAVn(gv) : GvAV(gv));
- break;
- case SVt_PVHV:
- sv = (SV*)(add ? GvHVn(gv) : GvHV(gv));
- break;
- case SVt_PVCV:
- sv = (SV*)GvCV(gv);
- break;
- case SVt_PVIO:
- sv = (SV*)(add ? GvIOn(gv) : GvIO(gv));
- break;
- case SVt_PVGV:
- sv = (SV*)gv;
- break;
- default: /* SCALAR */
- sv = add ? GvSVn(gv) : GvSV(gv);
- break;
- }
-
- return sv;
-}
-
-
-static void
-mop_update_method_map(pTHX_ SV *const self, SV *const class_name, HV *const stash, HV *const map)
-{
- const char *const class_name_pv = HvNAME(stash); /* must be HvNAME(stash), not SvPV_nolen_const(class_name) */
- SV *method_metaclass_name;
- char *method_name;
- I32 method_name_len;
- SV *coderef;
- HV *symbols;
- dSP;
-
- symbols = mop_get_all_package_symbols(stash, TYPE_FILTER_CODE);
- sv_2mortal((SV*)symbols);
- (void)hv_iterinit(symbols);
- while ( (coderef = hv_iternextsv(symbols, &method_name, &method_name_len)) ) {
- CV *cv = (CV *)SvRV(coderef);
- char *cvpkg_name;
- char *cv_name;
- SV *method_slot;
- SV *method_object;
-
- if (!mop_get_code_info(coderef, &cvpkg_name, &cv_name)) {
- continue;
- }
-
- /* this checks to see that the subroutine is actually from our package */
- if ( !(strEQ(cvpkg_name, "constant") && strEQ(cv_name, "__ANON__")) ) {
- if ( strNE(cvpkg_name, class_name_pv) ) {
- continue;
- }
- }
-
- method_slot = *hv_fetch(map, method_name, method_name_len, TRUE);
- if ( SvOK(method_slot) ) {
- SV *const body = mop_call0(aTHX_ method_slot, KEY_FOR(body)); /* $method_object->body() */
- if ( SvROK(body) && ((CV *) SvRV(body)) == cv ) {
- continue;
- }
- }
-
- method_metaclass_name = mop_call0(aTHX_ self, mop_method_metaclass); /* $self->method_metaclass() */
-
- /*
- $method_object = $method_metaclass->wrap(
- $cv,
- associated_metaclass => $self,
- package_name => $class_name,
- name => $method_name
- );
- */
- ENTER;
- SAVETMPS;
-
- PUSHMARK(SP);
- EXTEND(SP, 8);
- PUSHs(method_metaclass_name); /* invocant */
- mPUSHs(newRV_inc((SV *)cv));
- PUSHs(mop_associated_metaclass);
- PUSHs(self);
- PUSHs(KEY_FOR(package_name));
- PUSHs(class_name);
- PUSHs(KEY_FOR(name));
- mPUSHs(newSVpv(method_name, method_name_len));
- PUTBACK;
-
- call_sv(mop_wrap, G_SCALAR | G_METHOD);
- SPAGAIN;
- method_object = POPs;
- PUTBACK;
- /* $map->{$method_name} = $method_object */
- sv_setsv(method_slot, method_object);
-
- FREETMPS;
- LEAVE;
- }
-}
-
MODULE = Class::MOP::Package PACKAGE = Class::MOP::Package
PROTOTYPES: DISABLE
-void
-get_all_package_symbols(self, filter=TYPE_FILTER_NONE)
- SV *self
- type_filter_t filter
- PREINIT:
- HV *stash = NULL;
- HV *symbols = NULL;
- register HE *he;
- PPCODE:
- if ( ! SvROK(self) ) {
- die("Cannot call get_all_package_symbols as a class method");
- }
-
- if (GIMME_V == G_VOID) {
- XSRETURN_EMPTY;
- }
-
- PUTBACK;
-
- if ( (he = hv_fetch_ent((HV *)SvRV(self), KEY_FOR(package), 0, HASH_FOR(package))) ) {
- stash = gv_stashsv(HeVAL(he), 0);
- }
-
-
- if (!stash) {
- XSRETURN_UNDEF;
- }
-
- symbols = mop_get_all_package_symbols(stash, filter);
- PUSHs(sv_2mortal(newRV_noinc((SV *)symbols)));
-
-void
-get_method_map(self)
- SV *self
- PREINIT:
- HV *const obj = (HV *)SvRV(self);
- SV *const class_name = HeVAL( hv_fetch_ent(obj, KEY_FOR(package), 0, HASH_FOR(package)) );
- HV *const stash = gv_stashsv(class_name, 0);
- UV current;
- SV *cache_flag;
- SV *map_ref;
- PPCODE:
- if (!stash) {
- mXPUSHs(newRV_noinc((SV *)newHV()));
- return;
- }
-
- current = mop_check_package_cache_flag(aTHX_ stash);
- cache_flag = HeVAL( hv_fetch_ent(obj, KEY_FOR(package_cache_flag), TRUE, HASH_FOR(package_cache_flag)));
- map_ref = HeVAL( hv_fetch_ent(obj, KEY_FOR(methods), TRUE, HASH_FOR(methods)));
-
- /* $self->{methods} does not yet exist (or got deleted) */
- if ( !SvROK(map_ref) || SvTYPE(SvRV(map_ref)) != SVt_PVHV ) {
- SV *new_map_ref = newRV_noinc((SV *)newHV());
- sv_2mortal(new_map_ref);
- sv_setsv(map_ref, new_map_ref);
- }
-
- if ( !SvOK(cache_flag) || SvUV(cache_flag) != current ) {
- mop_update_method_map(aTHX_ self, class_name, stash, (HV *)SvRV(map_ref));
- sv_setuv(cache_flag, mop_check_package_cache_flag(aTHX_ stash)); /* update_cache_flag() */
- }
-
- XPUSHs(map_ref);
-
BOOT:
INSTALL_SIMPLE_READER_WITH_KEY(Package, name, package);
-
-
-SV*
-add_package_symbol(SV* self, SV* variable, SV* ref = &PL_sv_undef)
-PREINIT:
- svtype type;
- const char* type_name;
- const char* var_name;
- STRLEN var_name_len;
- GV* gv;
-CODE:
- mop_deconstruct_variable_name(aTHX_ variable, &var_name, &var_name_len, &type, &type_name);
- gv = mop_get_gv(aTHX_ self, type, var_name, var_name_len, GV_ADDMULTI);
-
- if(SvOK(ref)){ /* add_package_symbol with a value */
- if(type == SVt_PV){
- if(!SvROK(ref)){
- ref = newRV_noinc(newSVsv(ref));
- sv_2mortal(ref);
- }
- }
- else if(!(SvROK(ref) && SvTYPE(SvRV(ref)) == type)){
- croak("You must pass a reference of %s for the value of %s", type_name, GvNAME(CvGV(cv)));
- }
-
- if(type == SVt_PVCV && GvCV(gv)){
- /* XXX: clear it before redefinition */
- SvREFCNT_dec(GvCV(gv));
- GvCV(gv) = NULL;
- }
- sv_setsv_mg((SV*)gv, ref); /* magical assignment into type glob (*glob = $ref) */
-
- if(type == SVt_PVCV){ /* name a subroutine */
- CV* const subr = (CV*)SvRV(ref);
- if(CvANON(subr)
- && CvGV(subr)
- && isGV(CvGV(subr))
- && strEQ(GvNAME(CvGV(subr)), "__ANON__")){
-
- CvGV(subr) = gv;
- CvANON_off(subr);
- }
- }
- RETVAL = ref;
- SvREFCNT_inc_simple_void_NN(ref);
- }
- else{
- SV* const sv = mop_gv_elem(aTHX_ gv, type, GV_ADDMULTI);
- RETVAL = (sv && GIMME_V != G_VOID) ? newRV_inc(sv) : &PL_sv_undef;
- }
-OUTPUT:
- RETVAL
-
-bool
-has_package_symbol(SV* self, SV* variable)
-PREINIT:
- svtype type;
- const char* type_name;
- const char* var_name;
- STRLEN var_name_len;
- GV* gv;
-CODE:
- mop_deconstruct_variable_name(aTHX_ variable, &var_name, &var_name_len, &type, &type_name);
- gv = mop_get_gv(aTHX_ self, type, var_name, var_name_len, 0);
- RETVAL = mop_gv_elem(aTHX_ gv, type, FALSE) ? TRUE : FALSE;
-OUTPUT:
- RETVAL
-
-SV*
-get_package_symbol(SV* self, SV* variable, ...)
-PREINIT:
- svtype type;
- const char* type_name;
- const char* var_name;
- STRLEN var_name_len;
- I32 flags = 0;
- GV* gv;
- SV* sv;
-CODE:
- if(items > 2){ /* parse options */
- I32 i;
- if((items % 2) != 0){
- croak("Odd number of arguments for get_package_symbol()");
- }
- for(i = 2; i < items; i += 2){
- SV* const opt = ST(i);
- SV* const val = ST(i+1);
- if(strEQ(SvPV_nolen_const(opt), "create")){
- if(SvTRUE(val)){
- flags |= GV_ADDMULTI;
- }
- else{
- flags &= ~GV_ADDMULTI;
- }
- }
- else{
- warn("Unknown option \"%"SVf"\" for get_package_symbol()", opt);
- }
- }
- }
- mop_deconstruct_variable_name(aTHX_ variable, &var_name, &var_name_len, &type, &type_name);
- gv = mop_get_gv(aTHX_ self, type, var_name, var_name_len, flags);
- sv = mop_gv_elem(aTHX_ gv, type, FALSE);
-
- RETVAL = sv ? newRV_inc(sv) : &PL_sv_undef;
-OUTPUT:
- RETVAL
projects / gitmo/Class-MOP.git / blobdiff