passing structs

[m6w6/ext-psi] / src / libffi.c

diff --git a/src/libffi.c b/src/libffi.c
index 257fb48521b73f965a9534410daedf595da5a1e0..ac018a119640d8ea0deed03ba479cf1e6c18a260 100644 (file)
--- a/src/libffi.c
+++ b/src/libffi.c
@@ -91,10 +91,63 @@ static inline ffi_type *psi_ffi_token_type(token_t t) {
                return &ffi_type_float;
        case PSI_T_DOUBLE:
                return &ffi_type_double;
+       case PSI_T_POINTER:
+               return &ffi_type_pointer;
+       }
+}
+static inline ffi_type *psi_ffi_impl_type(token_t impl_type) {
+       switch (impl_type) {
+       case PSI_T_BOOL:
+               return &ffi_type_sint8;
+       case PSI_T_INT:
+               return &ffi_type_sint64;
+       case PSI_T_STRING:
+               return &ffi_type_pointer;
+       case PSI_T_FLOAT:
+       case PSI_T_DOUBLE:
+               return &ffi_type_double;
+       EMPTY_SWITCH_DEFAULT_CASE();
+       }
+}
+static void psi_ffi_struct_type_dtor(void *type) {
+       ffi_type *strct = type;
+
+       if (strct->elements) {
+               free(strct->elements);
        }
+       free(strct);
+}
+static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg);
+static ffi_type **psi_ffi_struct_type_elements(decl_struct *strct) {
+       ffi_type **els = calloc(strct->args->count + 1, sizeof(*els));
+       size_t i;
+
+       for (i = 0; i < strct->args->count; ++i) {
+               els[i] = psi_ffi_decl_arg_type(strct->args->args[i]);
+       }
+       els[i] = NULL;
+
+       return els;
 }
 static inline ffi_type *psi_ffi_decl_type(decl_type *type) {
-       return psi_ffi_token_type(real_decl_type(type)->type);
+       decl_type *real = real_decl_type(type);
+
+       if (real->type == PSI_T_STRUCT) {
+               if (!real->strct->engine.type) {
+                       ffi_type *strct = calloc(1, sizeof(ffi_type));
+
+                       strct->type = FFI_TYPE_STRUCT;
+                       strct->size = real->strct->size;
+                       strct->alignment = 0;
+                       strct->elements = psi_ffi_struct_type_elements(real->strct);
+
+                       real->strct->engine.type = strct;
+                       real->strct->engine.dtor = psi_ffi_struct_type_dtor;
+               }
+
+               return real->strct->engine.type;
+       }
+       return psi_ffi_token_type(real->type);
 }
 static inline ffi_type *psi_ffi_decl_arg_type(decl_arg *darg) {
        if (darg->var->pointer_level) {
@@ -252,10 +305,38 @@ static zend_function_entry *psi_ffi_compile(PSI_Context *C)
        return zfe;
 }
 
-static void psi_ffi_call(PSI_Context *C, decl_callinfo *decl_call) {
+static void psi_ffi_call(PSI_Context *C, decl_callinfo *decl_call, impl_vararg *va) {
        PSI_LibffiCall *call = decl_call->info;
 
-       ffi_call(&call->signature, FFI_FN(decl_call->sym), decl_call->rval, decl_call->args);
+       if (va) {
+               ffi_status rc;
+               ffi_cif signature;
+               size_t i, nfixedargs = decl_call->argc, ntotalargs = nfixedargs + va->args->count;
+               void **params = calloc(2 * ntotalargs + 2, sizeof(void *));
+
+               for (i = 0; i < nfixedargs; ++i) {
+                       params[i] = call->params[i];
+                       params[i + ntotalargs + 1] = call->params[i + nfixedargs + 1];
+               }
+               for (i = 0; i < va->args->count; ++i) {
+                       params[nfixedargs + i] = psi_ffi_impl_type(va->types[i]);
+                       params[nfixedargs + i + ntotalargs + 1] = &va->values[i];
+               }
+#ifdef PSI_HAVE_FFI_PREP_CIF_VAR
+               rc = ffi_prep_cif_var(&signature, call->signature.abi,
+                               nfixedargs, ntotalargs,
+                               call->signature.rtype, (ffi_type **) params);
+#else
+               /* FIXME: test in config.m4; assume we can just call anyway */
+               rc = ffi_prep_cif(&signature, call->signature.abi, ntotalargs,
+                               call->signature.rtype, (ffi_type **) params);
+#endif
+               ZEND_ASSERT(FFI_OK == rc);
+               ffi_call(&signature, FFI_FN(decl_call->sym), decl_call->rval, &params[ntotalargs + 1]);
+               free(params);
+       } else {
+               ffi_call(&call->signature, FFI_FN(decl_call->sym), decl_call->rval, decl_call->args);
+       }
 }
 
 static PSI_ContextOps ops = {