298 lines
7.4 KiB
C
298 lines
7.4 KiB
C
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/* Routines for handling XML generic OS data provided by target.
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Copyright (C) 2008-2022 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 "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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std::unique_ptr<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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std::unique_ptr<struct osdata> osdata;
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std::string 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,
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std::vector<gdb_xml_value> &attributes)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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if (data->osdata != NULL)
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gdb_xml_error (parser, _("Seen more than on osdata element"));
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char *type = (char *) xml_find_attribute (attributes, "type")->value.get ();
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data->osdata.reset (new struct osdata (std::string (type)));
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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,
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std::vector<gdb_xml_value> &attributes)
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{
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struct osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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data->osdata->items.emplace_back ();
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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,
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std::vector<gdb_xml_value> &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.get ();
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data->property_name.assign (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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osdata_parsing_data *data = (struct osdata_parsing_data *) user_data;
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struct osdata *osdata = data->osdata.get ();
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osdata_item &item = osdata->items.back ();
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item.columns.emplace_back (std::move (data->property_name),
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std::string (body_text));
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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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std::unique_ptr<osdata>
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osdata_parse (const char *xml)
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{
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osdata_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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return std::move (data.osdata);
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}
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return NULL;
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}
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#endif
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std::unique_ptr<osdata>
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get_osdata (const char *type)
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{
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std::unique_ptr<osdata> osdata;
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gdb::optional<gdb::char_vector> xml = target_get_osdata (type);
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if (xml)
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{
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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->data ());
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}
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if (osdata == NULL)
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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 std::string *
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get_osdata_column (const osdata_item &item, const char *name)
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{
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for (const osdata_column &col : item.columns)
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if (col.name == name)
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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_item *last = NULL;
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int ncols = 0;
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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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std::unique_ptr<osdata> osdata = get_osdata (type);
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int nrows = osdata->items.size ();
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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 (!osdata->items.empty ())
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{
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last = &osdata->items.back ();
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ncols = last->columns.size ();
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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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for (int ix = 0; ix < last->columns.size (); ix++)
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{
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if (last->columns[ix].name == "Title")
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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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return;
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if (last != NULL && !last->columns.empty ())
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{
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for (int ix = 0; ix < last->columns.size (); 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, last->columns[ix].name.c_str ());
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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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for (const osdata_item &item : osdata->items)
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{
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{
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ui_out_emit_tuple tuple_emitter (uiout, "item");
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for (int ix_cols = 0; ix_cols < item.columns.size (); 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, item.columns[ix_cols].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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}
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static void
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info_osdata_command (const char *arg, int from_tty)
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{
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info_osdata (arg);
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}
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void _initialize_osdata ();
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void
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_initialize_osdata ()
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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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