425 lines
10 KiB
C
425 lines
10 KiB
C
/* Routines for handling XML generic OS data provided by target.
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Copyright (C) 2008-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "target.h"
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#include "vec.h"
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#include "xml-support.h"
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#include "osdata.h"
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#include "ui-out.h"
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#include "gdbcmd.h"
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#if !defined(HAVE_LIBEXPAT)
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struct osdata *
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osdata_parse (const char *xml)
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{
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static int have_warned;
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if (!have_warned)
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{
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have_warned = 1;
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warning (_("Can not parse XML OS data; XML support was disabled "
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"at compile time"));
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}
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return NULL;
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}
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#else /* HAVE_LIBEXPAT */
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/* Internal parsing data passed to all XML callbacks. */
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struct osdata_parsing_data
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{
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struct osdata *osdata;
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char *property_name;
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};
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/* Handle the start of a <osdata> element. */
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static void
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osdata_start_osdata (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC(gdb_xml_value_s) *attributes)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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char *type;
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struct osdata *osdata;
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if (data->osdata)
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gdb_xml_error (parser, _("Seen more than on osdata element"));
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type = (char *) xml_find_attribute (attributes, "type")->value;
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osdata = XCNEW (struct osdata);
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osdata->type = xstrdup (type);
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data->osdata = osdata;
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}
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/* Handle the start of a <item> element. */
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static void
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osdata_start_item (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC(gdb_xml_value_s) *attributes)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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struct osdata_item item = { NULL };
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VEC_safe_push (osdata_item_s, data->osdata->items, &item);
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}
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/* Handle the start of a <column> element. */
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static void
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osdata_start_column (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC(gdb_xml_value_s) *attributes)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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const char *name
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= (const char *) xml_find_attribute (attributes, "name")->value;
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data->property_name = xstrdup (name);
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}
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/* Handle the end of a <column> element. */
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static void
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osdata_end_column (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, const char *body_text)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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struct osdata *osdata = data->osdata;
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struct osdata_item *item = VEC_last (osdata_item_s, osdata->items);
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struct osdata_column *col = VEC_safe_push (osdata_column_s,
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item->columns, NULL);
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/* Transfer memory ownership. NAME was already strdup'ed. */
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col->name = data->property_name;
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col->value = xstrdup (body_text);
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data->property_name = NULL;
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}
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/* Discard the constructed osdata (if an error occurs). */
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static void
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clear_parsing_data (void *p)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) p;
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osdata_free (data->osdata);
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data->osdata = NULL;
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xfree (data->property_name);
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data->property_name = NULL;
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}
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/* The allowed elements and attributes for OS data object.
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The root element is a <osdata>. */
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const struct gdb_xml_attribute column_attributes[] = {
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{ "name", GDB_XML_AF_NONE, NULL, NULL },
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{ NULL, GDB_XML_AF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element item_children[] = {
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{ "column", column_attributes, NULL,
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GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
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osdata_start_column, osdata_end_column },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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const struct gdb_xml_attribute osdata_attributes[] = {
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{ "type", GDB_XML_AF_NONE, NULL, NULL },
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{ NULL, GDB_XML_AF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element osdata_children[] = {
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{ "item", NULL, item_children,
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GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
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osdata_start_item, NULL },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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const struct gdb_xml_element osdata_elements[] = {
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{ "osdata", osdata_attributes, osdata_children,
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GDB_XML_EF_NONE, osdata_start_osdata, NULL },
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{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
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};
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struct osdata *
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osdata_parse (const char *xml)
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{
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struct cleanup *back_to;
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struct osdata_parsing_data data = { NULL };
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back_to = make_cleanup (clear_parsing_data, &data);
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if (gdb_xml_parse_quick (_("osdata"), "osdata.dtd",
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osdata_elements, xml, &data) == 0)
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{
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/* Parsed successfully, don't need to delete the result. */
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discard_cleanups (back_to);
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return data.osdata;
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}
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do_cleanups (back_to);
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return NULL;
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}
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#endif
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static void
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osdata_item_clear (struct osdata_item *item)
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{
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if (item->columns != NULL)
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{
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struct osdata_column *col;
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int ix;
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for (ix = 0;
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VEC_iterate (osdata_column_s, item->columns,
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ix, col);
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ix++)
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{
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xfree (col->name);
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xfree (col->value);
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}
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VEC_free (osdata_column_s, item->columns);
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item->columns = NULL;
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}
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}
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void
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osdata_free (struct osdata *osdata)
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{
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if (osdata == NULL)
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return;
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if (osdata->items != NULL)
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{
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struct osdata_item *item;
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int ix;
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for (ix = 0;
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VEC_iterate (osdata_item_s, osdata->items,
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ix, item);
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ix++)
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osdata_item_clear (item);
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VEC_free (osdata_item_s, osdata->items);
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}
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xfree (osdata);
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}
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static void
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osdata_free_cleanup (void *arg)
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{
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struct osdata *osdata = (struct osdata *) arg;
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osdata_free (osdata);
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}
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struct cleanup *
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make_cleanup_osdata_free (struct osdata *data)
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{
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return make_cleanup (osdata_free_cleanup, data);
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}
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struct osdata *
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get_osdata (const char *type)
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{
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struct osdata *osdata = NULL;
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char *xml = target_get_osdata (type);
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if (xml)
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{
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struct cleanup *old_chain = make_cleanup (xfree, xml);
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if (xml[0] == '\0')
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{
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if (type)
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warning (_("Empty data returned by target. Wrong osdata type?"));
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else
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warning (_("Empty type list returned by target. No type data?"));
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}
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else
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osdata = osdata_parse (xml);
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do_cleanups (old_chain);
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}
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if (!osdata)
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error (_("Can not fetch data now."));
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return osdata;
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}
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const char *
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get_osdata_column (struct osdata_item *item, const char *name)
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{
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struct osdata_column *col;
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int ix_cols;
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for (ix_cols = 0;
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VEC_iterate (osdata_column_s, item->columns,
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ix_cols, col);
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ix_cols++)
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if (strcmp (col->name, name) == 0)
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return col->value;
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return NULL;
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}
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void
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info_osdata (const char *type)
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{
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struct ui_out *uiout = current_uiout;
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struct osdata *osdata = NULL;
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struct osdata_item *last = NULL;
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struct cleanup *old_chain;
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int ncols = 0;
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int nrows;
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int col_to_skip = -1;
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if (type == NULL)
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type = "";
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osdata = get_osdata (type);
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old_chain = make_cleanup_osdata_free (osdata);
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nrows = VEC_length (osdata_item_s, osdata->items);
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if (*type == '\0' && nrows == 0)
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error (_("Available types of OS data not reported."));
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if (!VEC_empty (osdata_item_s, osdata->items))
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{
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last = VEC_last (osdata_item_s, osdata->items);
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if (last->columns)
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ncols = VEC_length (osdata_column_s, last->columns);
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/* As a special case, scan the listing of available data types
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for a column named "Title", and only include it with MI
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output; this column's normal use is for titles for interface
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elements like menus, and it clutters up CLI output. */
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if (*type == '\0' && !uiout->is_mi_like_p ())
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{
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struct osdata_column *col;
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int ix;
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for (ix = 0;
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VEC_iterate (osdata_column_s, last->columns, ix, col);
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ix++)
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{
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if (strcmp (col->name, "Title") == 0)
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col_to_skip = ix;
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}
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/* Be sure to reduce the total column count, otherwise
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internal errors ensue. */
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if (col_to_skip >= 0)
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--ncols;
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}
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}
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ui_out_emit_table table_emitter (uiout, ncols, nrows, "OSDataTable");
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/* With no columns/items, we just output an empty table, but we
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still output the table. This matters for MI. */
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if (ncols == 0)
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{
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do_cleanups (old_chain);
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return;
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}
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if (last && last->columns)
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{
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struct osdata_column *col;
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int ix;
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for (ix = 0;
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VEC_iterate (osdata_column_s, last->columns,
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ix, col);
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ix++)
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{
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char col_name[32];
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if (ix == col_to_skip)
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continue;
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snprintf (col_name, 32, "col%d", ix);
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uiout->table_header (10, ui_left,
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col_name, col->name);
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}
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}
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uiout->table_body ();
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if (nrows != 0)
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{
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struct osdata_item *item;
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int ix_items;
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for (ix_items = 0;
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VEC_iterate (osdata_item_s, osdata->items,
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ix_items, item);
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ix_items++)
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{
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int ix_cols;
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struct osdata_column *col;
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{
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ui_out_emit_tuple tuple_emitter (uiout, "item");
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for (ix_cols = 0;
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VEC_iterate (osdata_column_s, item->columns,
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ix_cols, col);
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ix_cols++)
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{
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char col_name[32];
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if (ix_cols == col_to_skip)
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continue;
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snprintf (col_name, 32, "col%d", ix_cols);
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uiout->field_string (col_name, col->value);
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}
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}
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uiout->text ("\n");
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}
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}
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do_cleanups (old_chain);
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}
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static void
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info_osdata_command (char *arg, int from_tty)
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{
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info_osdata (arg);
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}
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extern initialize_file_ftype _initialize_osdata; /* -Wmissing-prototypes */
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void
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_initialize_osdata (void)
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{
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add_info ("os", info_osdata_command,
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_("Show OS data ARG."));
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}
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