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gecko-dev/xpcom/typelib/xpidl/xpidl_util.c

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C
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Utility functions called by various backends.
*/
#include "xpidl.h"
#ifdef XP_WIN
#define strdup _strdup
#endif
/* XXXbe static */ char OOM[] = "ERROR: out of memory\n";
void *
xpidl_malloc(size_t nbytes)
{
void *p = malloc(nbytes);
if (!p) {
fputs(OOM, stderr);
exit(1);
}
return p;
}
char *
xpidl_strdup(const char *s)
{
char *ns = strdup(s);
if (!ns) {
fputs(OOM, stderr);
exit(1);
}
return ns;
}
void
xpidl_write_comment(TreeState *state, int indent)
{
fprintf(state->file, "%*s/* ", indent, "");
IDL_tree_to_IDL(state->tree, state->ns, state->file,
IDLF_OUTPUT_NO_NEWLINES |
IDLF_OUTPUT_NO_QUALIFY_IDENTS |
IDLF_OUTPUT_PROPERTIES);
fputs(" */\n", state->file);
}
/*
* Print an iid to into a supplied buffer; the buffer should be at least
* UUID_LENGTH bytes.
*/
gboolean
xpidl_sprint_iid(nsID *id, char iidbuf[])
{
int printed;
printed = sprintf(iidbuf,
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
(PRUint32) id->m0, (PRUint32) id->m1,(PRUint32) id->m2,
(PRUint32) id->m3[0], (PRUint32) id->m3[1],
(PRUint32) id->m3[2], (PRUint32) id->m3[3],
(PRUint32) id->m3[4], (PRUint32) id->m3[5],
(PRUint32) id->m3[6], (PRUint32) id->m3[7]);
#ifdef SPRINTF_RETURNS_STRING
return (printed && strlen((char *)printed) == 36);
#else
return (printed == 36);
#endif
}
/* We only parse the {}-less format. */
static const char nsIDFmt2[] =
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x";
/*
* Parse a uuid string into an nsID struct. We cannot link against libxpcom,
* so we re-implement nsID::Parse here.
*/
gboolean
xpidl_parse_iid(nsID *id, const char *str)
{
PRInt32 count = 0;
PRUint32 n0, n1, n2;
PRUint32 n3[8];
PRUint32 i;
XPT_ASSERT(str != NULL);
if (strlen(str) != 36) {
return FALSE;
}
#ifdef DEBUG_shaver_iid
fprintf(stderr, "parsing iid %s\n", str);
#endif
count = sscanf(str, nsIDFmt2,
&n0, &n1, &n2,
&n3[0],&n3[1],&n3[2],&n3[3],
&n3[4],&n3[5],&n3[6],&n3[7]);
id->m0 = n0;
id->m1 = (PRUint16) n1;
id->m2 = (PRUint16) n2;
for (i = 0; i < 8; i++) {
id->m3[i] = (PRUint8) n3[i];
}
#ifdef DEBUG_shaver_iid
if (count == 11) {
fprintf(stderr, "IID parsed to ");
print_IID(id, stderr);
fputs("\n", stderr);
}
#endif
return (gboolean)(count == 11);
}
gboolean
verify_const_declaration(IDL_tree const_tree) {
struct _IDL_CONST_DCL *dcl = &IDL_CONST_DCL(const_tree);
const char *name = IDL_IDENT(dcl->ident).str;
IDL_tree real_type;
/* const -> list -> interface */
if (!IDL_NODE_UP(IDL_NODE_UP(const_tree)) ||
IDL_NODE_TYPE(IDL_NODE_UP(IDL_NODE_UP(const_tree)))
!= IDLN_INTERFACE) {
IDL_tree_error(const_tree,
"const declaration \'%s\' outside interface",
name);
return FALSE;
}
/* Could be a typedef; try to map it to the real type. */
real_type = find_underlying_type(dcl->const_type);
real_type = real_type ? real_type : dcl->const_type;
if (IDL_NODE_TYPE(real_type) == IDLN_TYPE_INTEGER &&
(IDL_TYPE_INTEGER(real_type).f_type == IDL_INTEGER_TYPE_SHORT ||
IDL_TYPE_INTEGER(real_type).f_type == IDL_INTEGER_TYPE_LONG))
{
if (!IDL_TYPE_INTEGER(real_type).f_signed &&
IDL_INTEGER(dcl->const_exp).value < 0)
{
#ifndef G_HAVE_GINT64
/*
* For platforms without longlong support turned on we can get
* confused by the high bit of the long value and think that it
* represents a negative value in an unsigned declaration.
* In that case we don't know if it is the programmer who is
* confused or the compiler. So we issue a warning instead of
* an error.
*/
if (IDL_TYPE_INTEGER(real_type).f_type == IDL_INTEGER_TYPE_LONG)
{
XPIDL_WARNING((const_tree, IDL_WARNING1,
"unsigned const declaration \'%s\' "
"initialized with (possibly) negative constant",
name));
return TRUE;
}
#endif
IDL_tree_error(const_tree,
"unsigned const declaration \'%s\' initialized with "
"negative constant",
name);
return FALSE;
}
} else {
IDL_tree_error(const_tree,
"const declaration \'%s\' must be of type short or long",
name);
return FALSE;
}
return TRUE;
}
/*
* This method consolidates error checking needed when coercing the XPIDL compiler
* via the -t flag to generate output for a specific version of XPConnect.
*/
static gboolean
verify_type_fits_version(IDL_tree in_tree, IDL_tree error_tree)
{
if (major_version == 1 && minor_version == 1)
{
/* XPIDL Version 1.1 checks */
/* utf8string, cstring, and astring types are not supported */
if (IDL_tree_property_get(in_tree, "utf8string") != NULL ||
IDL_tree_property_get(in_tree, "cstring") != NULL ||
IDL_tree_property_get(in_tree, "astring") != NULL)
{
IDL_tree_error(error_tree,
"Cannot use [utf8string], [cstring] and [astring] "
"types when generating version 1.1 typelibs\n");
return FALSE;
}
}
return TRUE;
}
static gboolean
IsNot_AlphaUpper(char letter)
{
return letter < 'A' || letter > 'Z';
}
static gboolean
IsNot_AlphaLower(char letter)
{
return letter < 'a' || letter > 'z';
}
static gboolean
matches_IFoo(const char* substring)
{
if (substring[0] != 'I')
return FALSE;
if (IsNot_AlphaUpper(substring[1]))
return FALSE;
if (IsNot_AlphaLower(substring[2]))
return FALSE;
return TRUE;
}
static gboolean
matches_nsIFoo(const char* attribute_name)
{
if (IsNot_AlphaLower(attribute_name[0]))
return FALSE;
if (IsNot_AlphaLower(attribute_name[1]))
return FALSE;
if (matches_IFoo(attribute_name + 2))
return TRUE;
if (IsNot_AlphaLower(attribute_name[2]))
return FALSE;
return matches_IFoo(attribute_name + 3);
}
/**
* Returns TRUE if the method is probably scriptable, FALSE otherwise.
* The first parameter may also be an attr_tree parameter, since these two are
* the same with respect to discovering the interface node.
*/
gboolean
is_method_scriptable(IDL_tree method_tree, IDL_tree ident)
{
IDL_tree iface;
gboolean scriptable_interface;
/*
* Look up the tree to find the interface. If we can't find the interface,
* then the caller is being called on an incorrect tree. If we find it, we
* see if it's [scriptable] and duly note it.
*/
if (IDL_NODE_UP(method_tree) && IDL_NODE_UP(IDL_NODE_UP(method_tree)) &&
IDL_NODE_TYPE(iface = IDL_NODE_UP(IDL_NODE_UP(method_tree)))
== IDLN_INTERFACE)
{
scriptable_interface =
(IDL_tree_property_get(IDL_INTERFACE(iface).ident, "scriptable")
!= NULL);
} else {
IDL_tree_error(method_tree,
"is_method_scriptable called on a non-interface?");
return FALSE;
}
/* If the interface isn't scriptable, the method sure can't be... */
if (!scriptable_interface)
return FALSE;
/* [notxpcom] implies [noscript] */
if (IDL_tree_property_get(ident, "notxpcom") != NULL)
return FALSE;
/* [noscript] methods obviously aren't scriptable */
if (IDL_tree_property_get(ident, "noscript") != NULL)
return FALSE;
/* The interface is scriptable, so therefore the method is, if the
* interfaces are accessible. That's good enough for this method.
*/
return TRUE;
}
gboolean
verify_attribute_declaration(IDL_tree attr_tree)
{
IDL_tree iface;
IDL_tree ident;
IDL_tree attr_type;
/* We don't support attributes named IID, conflicts with static GetIID
* member. The conflict is due to certain compilers (VC++) choosing a
* different vtable order, placing GetIID at the beginning regardless
* of it's placement
*/
if (strcmp(
IDL_IDENT(
IDL_LIST(IDL_ATTR_DCL(attr_tree).simple_declarations).data).str,
"IID") == 0) {
IDL_tree_error(attr_tree,
"Attributes named IID not supported, causes vtable "
"ordering problems");
return FALSE;
}
/*
* Grab the first of the list of idents and hope that it'll
* say scriptable or no.
*/
ident = IDL_LIST(IDL_ATTR_DCL(attr_tree).simple_declarations).data;
/*
* If the interface isn't scriptable, or the attribute is marked noscript,
* there's no need to check. This also verifies that we've been called on
* an interface.
*/
if (!is_method_scriptable(attr_tree, ident))
return TRUE;
/*
* If it should be scriptable, check that the type is non-native. nsid,
* domstring, utf8string, cstring, astring are exempted.
*/
attr_type = IDL_ATTR_DCL(attr_tree).param_type_spec;
if (attr_type != NULL)
{
if (UP_IS_NATIVE(attr_type) &&
IDL_tree_property_get(attr_type, "nsid") == NULL &&
IDL_tree_property_get(attr_type, "domstring") == NULL &&
IDL_tree_property_get(attr_type, "utf8string") == NULL &&
IDL_tree_property_get(attr_type, "cstring") == NULL &&
IDL_tree_property_get(attr_type, "astring") == NULL)
{
IDL_tree_error(attr_tree,
"attributes in [scriptable] interfaces that are "
"non-scriptable because they refer to native "
"types must be marked [noscript]\n");
return FALSE;
}
/*
* We currently don't support properties of type nsid that aren't
* pointers or references, unless they are marked [notxpcom} and
* must be read-only
*/
if ((IDL_tree_property_get(ident, "notxpcom") == NULL || !(IDL_ATTR_DCL(attr_tree).f_readonly)) &&
IDL_tree_property_get(attr_type,"nsid") != NULL &&
IDL_tree_property_get(attr_type,"ptr") == NULL &&
IDL_tree_property_get(attr_type,"ref") == NULL)
{
IDL_tree_error(attr_tree,
"Feature not currently supported: "
"attributes with a type of nsid must be marked "
"either [ptr] or [ref], or "
"else must be marked [notxpcom] "
"and must be read-only\n");
return FALSE;
}
/*
* canIGoHomeNow is a bad name for an attribute.
* /^[a-z]{2,3}I[A-Z][a-z]/ => bad, reserved for
* interface flattening.
*/
if (matches_nsIFoo(IDL_IDENT(IDL_LIST(IDL_ATTR_DCL(attr_tree).
simple_declarations).data).str)) {
XPIDL_WARNING((attr_tree, IDL_WARNING1,
"Naming an attribute nsIFoo causes "
"problems for interface flattening"));
}
/*
* Run additional error checks on the attribute type if targetting an
* older version of XPConnect.
*/
if (!verify_type_fits_version(attr_type, attr_tree))
return FALSE;
}
if (IDL_LIST(IDL_ATTR_DCL(attr_tree).simple_declarations).next != NULL)
{
IDL_tree_error(attr_tree,
"multiple attributes in a single declaration is not supported\n");
return FALSE;
}
return TRUE;
}
/*
* Find the underlying type of an identifier typedef.
*
* All the needed tree-walking seems pretty shaky; isn't there something in
* libIDL to automate this?
*/
IDL_tree /* IDL_TYPE_DCL */
find_underlying_type(IDL_tree typedef_ident)
{
IDL_tree up;
if (typedef_ident == NULL || IDL_NODE_TYPE(typedef_ident) != IDLN_IDENT)
return NULL;
up = IDL_NODE_UP(typedef_ident);
if (up == NULL || IDL_NODE_TYPE(up) != IDLN_LIST)
return NULL;
up = IDL_NODE_UP(up);
if (up == NULL || IDL_NODE_TYPE(up) != IDLN_TYPE_DCL)
return NULL;
return IDL_TYPE_DCL(up).type_spec;
}
static IDL_tree /* IDL_PARAM_DCL */
find_named_parameter(IDL_tree method_tree, const char *param_name)
{
IDL_tree iter;
for (iter = IDL_OP_DCL(method_tree).parameter_dcls; iter;
iter = IDL_LIST(iter).next)
{
IDL_tree param = IDL_LIST(iter).data;
IDL_tree simple_decl = IDL_PARAM_DCL(param).simple_declarator;
const char *current_name = IDL_IDENT(simple_decl).str;
if (strcmp(current_name, param_name) == 0)
return param;
}
return NULL;
}
typedef enum ParamAttrType {
IID_IS,
LENGTH_IS,
SIZE_IS
} ParamAttrType;
/*
* Check that parameters referred to by attributes such as size_is exist and
* refer to parameters of the appropriate type.
*/
static gboolean
check_param_attribute(IDL_tree method_tree, IDL_tree param,
ParamAttrType whattocheck)
{
const char *method_name = IDL_IDENT(IDL_OP_DCL(method_tree).ident).str;
const char *referred_name = NULL;
IDL_tree param_type = IDL_PARAM_DCL(param).param_type_spec;
IDL_tree simple_decl = IDL_PARAM_DCL(param).simple_declarator;
const char *param_name = IDL_IDENT(simple_decl).str;
const char *attr_name;
const char *needed_type;
if (whattocheck == IID_IS) {
attr_name = "iid_is";
needed_type = "IID";
} else if (whattocheck == LENGTH_IS) {
attr_name = "length_is";
needed_type = "unsigned long (or PRUint32)";
} else if (whattocheck == SIZE_IS) {
attr_name = "size_is";
needed_type = "unsigned long (or PRUint32)";
} else {
XPT_ASSERT("asked to check an unknown attribute type!");
return TRUE;
}
referred_name = IDL_tree_property_get(simple_decl, attr_name);
if (referred_name != NULL) {
IDL_tree referred_param = find_named_parameter(method_tree,
referred_name);
IDL_tree referred_param_type;
if (referred_param == NULL) {
IDL_tree_error(method_tree,
"attribute [%s(%s)] refers to missing "
"parameter \"%s\"",
attr_name, referred_name, referred_name);
return FALSE;
}
if (referred_param == param) {
IDL_tree_error(method_tree,
"attribute [%s(%s)] refers to it's own parameter",
attr_name, referred_name);
return FALSE;
}
referred_param_type = IDL_PARAM_DCL(referred_param).param_type_spec;
if (whattocheck == IID_IS) {
/* require IID type */
if (IDL_tree_property_get(referred_param_type, "nsid") == NULL) {
IDL_tree_error(method_tree,
"target \"%s\" of [%s(%s)] attribute "
"must be of %s type",
referred_name, attr_name, referred_name,
needed_type);
return FALSE;
}
} else if (whattocheck == LENGTH_IS || whattocheck == SIZE_IS) {
/* require PRUint32 type */
IDL_tree real_type;
/* Could be a typedef; try to map it to the real type. */
real_type = find_underlying_type(referred_param_type);
real_type = real_type ? real_type : referred_param_type;
if (IDL_NODE_TYPE(real_type) != IDLN_TYPE_INTEGER ||
IDL_TYPE_INTEGER(real_type).f_signed != FALSE ||
IDL_TYPE_INTEGER(real_type).f_type != IDL_INTEGER_TYPE_LONG)
{
IDL_tree_error(method_tree,
"target \"%s\" of [%s(%s)] attribute "
"must be of %s type",
referred_name, attr_name, referred_name,
needed_type);
return FALSE;
}
}
}
return TRUE;
}
/*
* Common method verification code, called by *op_dcl in the various backends.
*/
gboolean
verify_method_declaration(IDL_tree method_tree)
{
struct _IDL_OP_DCL *op = &IDL_OP_DCL(method_tree);
IDL_tree iface;
IDL_tree iter;
gboolean notxpcom;
gboolean scriptable_method;
gboolean seen_retval = FALSE;
gboolean hasoptional = PR_FALSE;
const char *method_name = IDL_IDENT(IDL_OP_DCL(method_tree).ident).str;
/* We don't support attributes named IID, conflicts with static GetIID
* member. The conflict is due to certain compilers (VC++) choosing a
* different vtable order, placing GetIID at the beginning regardless
* of it's placement
*/
if (strcmp(method_name, "GetIID") == 0) {
IDL_tree_error(method_tree,
"Methods named GetIID not supported, causes vtable "
"ordering problems");
return FALSE;
}
if (op->f_varargs) {
/* We don't currently support varargs. */
IDL_tree_error(method_tree, "varargs are not currently supported");
return FALSE;
}
/*
* Decide if we are a scriptable method, or if we were are notxpcom.
* In doing so, we also verify that we've been called on an interface.
*/
scriptable_method = is_method_scriptable(method_tree, op->ident);
notxpcom = IDL_tree_property_get(op->ident, "notxpcom") != NULL;
/* Loop through the parameters and check. */
for (iter = op->parameter_dcls; iter; iter = IDL_LIST(iter).next) {
IDL_tree param = IDL_LIST(iter).data;
IDL_tree param_type =
IDL_PARAM_DCL(param).param_type_spec;
IDL_tree simple_decl =
IDL_PARAM_DCL(param).simple_declarator;
const char *param_name = IDL_IDENT(simple_decl).str;
/*
* Reject this method if it should be scriptable and some parameter is
* native that isn't marked with either nsid, domstring, utf8string,
* cstring, astring or iid_is.
*/
if (scriptable_method &&
UP_IS_NATIVE(param_type) &&
IDL_tree_property_get(param_type, "nsid") == NULL &&
IDL_tree_property_get(simple_decl, "iid_is") == NULL &&
IDL_tree_property_get(param_type, "domstring") == NULL &&
IDL_tree_property_get(param_type, "utf8string") == NULL &&
IDL_tree_property_get(param_type, "cstring") == NULL &&
IDL_tree_property_get(param_type, "astring") == NULL)
{
IDL_tree_error(method_tree,
"methods in [scriptable] interfaces that are "
"non-scriptable because they refer to native "
"types (parameter \"%s\") must be marked "
"[noscript]", param_name);
return FALSE;
}
/*
* nsid's parameters that aren't ptr's or ref's are not currently
* supported in xpcom or non-xpcom (marked with [notxpcom]) methods
* as input parameters
*/
if (!(notxpcom && IDL_PARAM_DCL(param).attr != IDL_PARAM_IN) &&
IDL_tree_property_get(param_type, "nsid") != NULL &&
IDL_tree_property_get(param_type, "ptr") == NULL &&
IDL_tree_property_get(param_type, "ref") == NULL)
{
IDL_tree_error(method_tree,
"Feature currently not supported: "
"parameter \"%s\" is of type nsid and "
"must be marked either [ptr] or [ref] "
"or method \"%s\" must be marked [notxpcom] "
"and must not be an input parameter",
param_name,
method_name);
return FALSE;
}
/*
* Sanity checks on return values.
*/
if (IDL_tree_property_get(simple_decl, "retval") != NULL) {
if (IDL_LIST(iter).next != NULL) {
IDL_tree_error(method_tree,
"only the last parameter can be marked [retval]");
return FALSE;
}
if (op->op_type_spec) {
IDL_tree_error(method_tree,
"can't have [retval] with non-void return type");
return FALSE;
}
/* In case XPConnect relaxes the retval-is-last restriction. */
if (seen_retval) {
IDL_tree_error(method_tree,
"can't have more than one [retval] parameter");
return FALSE;
}
seen_retval = TRUE;
}
/*
* Confirm that [shared] attributes are only used with string, wstring,
* or native (but not nsid, domstring, utf8string, cstring or astring)
* and can't be used with [array].
*/
if (IDL_tree_property_get(simple_decl, "shared") != NULL) {
IDL_tree real_type;
real_type = find_underlying_type(param_type);
real_type = real_type ? real_type : param_type;
if (IDL_tree_property_get(simple_decl, "array") != NULL) {
IDL_tree_error(method_tree,
"[shared] parameter \"%s\" cannot "
"be of array type", param_name);
return FALSE;
}
if (!(IDL_NODE_TYPE(real_type) == IDLN_TYPE_STRING ||
IDL_NODE_TYPE(real_type) == IDLN_TYPE_WIDE_STRING ||
(UP_IS_NATIVE(real_type) &&
!IDL_tree_property_get(real_type, "nsid") &&
!IDL_tree_property_get(real_type, "domstring") &&
!IDL_tree_property_get(real_type, "utf8string") &&
!IDL_tree_property_get(real_type, "cstring") &&
!IDL_tree_property_get(real_type, "astring"))))
{
IDL_tree_error(method_tree,
"[shared] parameter \"%s\" must be of type "
"string, wstring or native", param_name);
return FALSE;
}
}
/*
* confirm that once an optional argument is used, all remaining
* arguments are marked as optional
*/
if (IDL_tree_property_get(simple_decl, "optional") != NULL) {
hasoptional = PR_TRUE;
}
else if (hasoptional) {
IDL_tree_error(method_tree,
"non-optional parameter used after one marked [optional]");
return FALSE;
}
/*
* inout is not allowed with "domstring", "UTF8String", "CString"
* and "AString" types
*/
if (IDL_PARAM_DCL(param).attr == IDL_PARAM_INOUT &&
UP_IS_NATIVE(param_type) &&
(IDL_tree_property_get(param_type, "domstring") != NULL ||
IDL_tree_property_get(param_type, "utf8string") != NULL ||
IDL_tree_property_get(param_type, "cstring") != NULL ||
IDL_tree_property_get(param_type, "astring") != NULL )) {
IDL_tree_error(method_tree,
"[domstring], [utf8string], [cstring], [astring] "
"types cannot be used as inout parameters");
return FALSE;
}
/*
* arrays of domstring, utf8string, cstring, astring types not allowed
*/
if (IDL_tree_property_get(simple_decl, "array") != NULL &&
UP_IS_NATIVE(param_type) &&
(IDL_tree_property_get(param_type, "domstring") != NULL ||
IDL_tree_property_get(param_type, "utf8string") != NULL ||
IDL_tree_property_get(param_type, "cstring") != NULL ||
IDL_tree_property_get(param_type, "astring") != NULL)) {
IDL_tree_error(method_tree,
"[domstring], [utf8string], [cstring], [astring] "
"types cannot be used in array parameters");
return FALSE;
}
if (!check_param_attribute(method_tree, param, IID_IS) ||
!check_param_attribute(method_tree, param, LENGTH_IS) ||
!check_param_attribute(method_tree, param, SIZE_IS))
return FALSE;
/*
* Run additional error checks on the parameter type if targetting an
* older version of XPConnect.
*/
if (!verify_type_fits_version(param_type, method_tree))
return FALSE;
}
/* XXX q: can return type be nsid? */
/* Native return type? */
if (scriptable_method &&
op->op_type_spec != NULL && UP_IS_NATIVE(op->op_type_spec) &&
IDL_tree_property_get(op->op_type_spec, "nsid") == NULL &&
IDL_tree_property_get(op->op_type_spec, "domstring") == NULL &&
IDL_tree_property_get(op->op_type_spec, "utf8string") == NULL &&
IDL_tree_property_get(op->op_type_spec, "cstring") == NULL &&
IDL_tree_property_get(op->op_type_spec, "astring") == NULL)
{
IDL_tree_error(method_tree,
"methods in [scriptable] interfaces that are "
"non-scriptable because they return native "
"types must be marked [noscript]");
return FALSE;
}
/*
* nsid's parameters that aren't ptr's or ref's are not currently
* supported in xpcom
*/
if (!notxpcom &&
op->op_type_spec != NULL &&
IDL_tree_property_get(op->op_type_spec, "nsid") != NULL &&
IDL_tree_property_get(op->op_type_spec, "ptr") == NULL &&
IDL_tree_property_get(op->op_type_spec, "ref") == NULL)
{
IDL_tree_error(method_tree,
"Feature currently not supported: "
"return value is of type nsid and "
"must be marked either [ptr] or [ref], "
"or else method \"%s\" must be marked [notxpcom] ",
method_name);
return FALSE;
}
/*
* Run additional error checks on the return type if targetting an
* older version of XPConnect.
*/
if (op->op_type_spec != NULL &&
!verify_type_fits_version(op->op_type_spec, method_tree))
{
return FALSE;
}
return TRUE;
}
/*
* Verify that a native declaration has an associated C++ expression, i.e. that
* it's of the form native <idl-name>(<c++-name>)
*/
gboolean
check_native(TreeState *state)
{
char *native_name;
/* require that native declarations give a native type */
if (IDL_NATIVE(state->tree).user_type)
return TRUE;
native_name = IDL_IDENT(IDL_NATIVE(state->tree).ident).str;
IDL_tree_error(state->tree,
"``native %s;'' needs C++ type: ``native %s(<C++ type>);''",
native_name, native_name);
return FALSE;
}
/*
* Print a GSList as char strings to a file.
*/
void
printlist(FILE *outfile, GSList *slist)
{
guint i;
guint len = g_slist_length(slist);
for(i = 0; i < len; i++) {
fprintf(outfile,
"%s\n", (char *)g_slist_nth_data(slist, i));
}
}
void
xpidl_list_foreach(IDL_tree p, IDL_tree_func foreach, gpointer user_data)
{
IDL_tree_func_data tfd;
while (p) {
struct _IDL_LIST *list = &IDL_LIST(p);
tfd.tree = list->data;
if (!foreach(&tfd, user_data))
return;
p = list->next;
}
}
/*
* Verify that the interface declaration is correct
*/
gboolean
verify_interface_declaration(IDL_tree interface_tree)
{
IDL_tree iter;
/*
* If we have the scriptable attribute then make sure all of our direct
* parents have it as well.
* NOTE: We don't recurse since all interfaces will fall through here
*/
if (IDL_tree_property_get(IDL_INTERFACE(interface_tree).ident,
"scriptable")) {
for (iter = IDL_INTERFACE(interface_tree).inheritance_spec; iter;
iter = IDL_LIST(iter).next) {
if (IDL_tree_property_get(
IDL_INTERFACE(iter).ident, "scriptable") == 0) {
XPIDL_WARNING((interface_tree,IDL_WARNING1,
"%s is scriptable but inherits from the non-scriptable interface %s\n",
IDL_IDENT(IDL_INTERFACE(interface_tree).ident).str,
IDL_IDENT(IDL_INTERFACE(iter).ident).str));
}
}
}
return TRUE;
}
/*
* Return a pointer to the start of the base filename of path
*/
const char *
xpidl_basename(const char * path)
{
const char * result = g_basename(path);
/*
*If this is windows then we'll handle either / or \ as a separator
* g_basename only handles \ for windows
*/
#if defined(XP_WIN32)
const char * slash = strrchr(path, '/');
/* If we found a slash and its after the current default OS separator */
if (slash != NULL && (slash > result))
result = slash + 1;
#endif
return result;
}
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