binutils-gdb/gdb/osdata.c

296 lines
7.5 KiB
C

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