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/* operator body generation
*
* This file is part of nsgenjsbind.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
*/
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "options.h"
#include "genjsbind-ast.h"
#include "webidl-ast.h"
#include "jsapi-libdom.h"
/** creates all the variable definitions
*
* generate functions variables (including return value) with default
* values as appropriate
*/
static void
output_variable_definitions(struct binding *binding, struct webidl_node *operation_list)
{
struct webidl_node *arglist_node;
struct webidl_node *arglist; /* argument list */
struct webidl_node *arg_node = NULL;
/* return value */
fprintf(binding->outfile, "\tjsval jsretval = JSVAL_VOID;\n");
/* input variables */
arglist_node = webidl_node_find(operation_list,
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
if (arglist_node == NULL) {
return; /* @todo check if this is broken AST */
}
arglist = webidl_node_getnode(arglist_node);
arg_node = webidl_node_find_type(arglist,
arg_node,
WEBIDL_NODE_TYPE_ARGUMENT);
while (arg_node != NULL) {
/* generate variable to hold the argument */
arg_node = webidl_node_find_type(arglist,
arg_node,
WEBIDL_NODE_TYPE_ARGUMENT);
}
}
static void
output_operation_input(struct binding *binding,
struct webidl_node *operation_list)
{
struct webidl_node *arglist_node;
struct webidl_node *arglist; /* argument list */
struct webidl_node *arg_node = NULL;
arglist_node = webidl_node_find(operation_list,
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
if (arglist_node == NULL) {
return; /* @todo check if this is broken AST */
}
arglist = webidl_node_getnode(arglist_node);
arg_node = webidl_node_find_type(arglist,
arg_node,
WEBIDL_NODE_TYPE_ARGUMENT);
while (arg_node != NULL) {
/*
if (!JS_ConvertArguments(cx, argc, JSAPI_ARGV(cx, vp), "S", &u16_txt)) {
return JS_FALSE;
}
JSString_to_char(u16_txt, txt, length);
*/
arg_node = webidl_node_find_type(arglist,
arg_node,
WEBIDL_NODE_TYPE_ARGUMENT);
}
}
static void
output_operation_code_block(struct binding *binding,
struct genbind_node *operation_list)
{
struct genbind_node *code_node;
code_node = genbind_node_find_type(operation_list,
NULL,
GENBIND_NODE_TYPE_CBLOCK);
if (code_node != NULL) {
fprintf(binding->outfile,
"%s\n",
genbind_node_gettext(code_node));
}
}
static int webidl_operator_body_cb(struct webidl_node *node, void *ctx)
{
struct binding *binding = ctx;
struct webidl_node *ident_node;
struct genbind_node *operation_node;
ident_node = webidl_node_find(webidl_node_getnode(node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_IDENT);
if (ident_node == NULL) {
/* operation without identifier - must have special keyword
* http://www.w3.org/TR/WebIDL/#idl-operations
*/
} else {
/* normal operation with identifier */
fprintf(binding->outfile,
"static JSBool JSAPI_NATIVE(%s, JSContext *cx, uintN argc, jsval *vp)\n",
webidl_node_gettext(ident_node));
fprintf(binding->outfile,
"{\n");
fprintf(binding->outfile,
"\tstruct jsclass_private *private;\n");
output_variable_definitions(binding, webidl_node_getnode(node));
fprintf(binding->outfile,
"\n"
"\tprivate = JS_GetInstancePrivate(cx,\n"
"\t\t\tJS_THIS_OBJECT(cx,vp),\n"
"\t\t\t&jsclass_object,\n"
"\t\t\tNULL);\n"
"\tif (priv == NULL)\n"
"\t\treturn JS_FALSE;\n\n");
output_operation_input(binding, webidl_node_getnode(node));
operation_node = genbind_node_find_type_ident(binding->gb_ast,
NULL,
GENBIND_NODE_TYPE_OPERATION,
webidl_node_gettext(ident_node));
if (operation_node != NULL) {
output_operation_code_block(binding,
genbind_node_getnode(operation_node));
}
/* set return value an return true */
fprintf(binding->outfile,
"\tJSAPI_SET_RVAL(cx, vp, jsretval);\n"
"\treturn JS_TRUE;\n"
"}\n\n");
}
return 0;
}
/* exported interface documented in jsapi-libdom.h */
int
output_operator_body(struct binding *binding, const char *interface)
{
struct webidl_node *interface_node;
struct webidl_node *members_node;
struct webidl_node *inherit_node;
/* find interface in webidl with correct ident attached */
interface_node = webidl_node_find_type_ident(binding->wi_ast,
WEBIDL_NODE_TYPE_INTERFACE,
interface);
if (interface_node == NULL) {
fprintf(stderr,
"Unable to find interface %s in loaded WebIDL\n",
interface);
return -1;
}
members_node = webidl_node_find(webidl_node_getnode(interface_node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
while (members_node != NULL) {
fprintf(binding->outfile,"/**** %s ****/\n", interface);
/* for each function emit a JSAPI_FS()*/
webidl_node_for_each_type(webidl_node_getnode(members_node),
WEBIDL_NODE_TYPE_OPERATION,
webidl_operator_body_cb,
binding);
members_node = webidl_node_find(webidl_node_getnode(interface_node),
members_node,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
}
/* check for inherited nodes and insert them too */
inherit_node = webidl_node_find(webidl_node_getnode(interface_node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_INTERFACE_INHERITANCE);
if (inherit_node != NULL) {
return output_operator_body(binding,
webidl_node_gettext(inherit_node));
}
return 0;
}
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