/* Helper routines for parsing XML using Expat.
- Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2006-2012 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcmd.h"
+#include "exceptions.h"
+#include "xml-support.h"
+
+#include "gdb_string.h"
+#include "safe-ctype.h"
/* Debugging flag. */
static int debug_xml;
available. */
#ifdef HAVE_LIBEXPAT
-#include "exceptions.h"
-#include "xml-support.h"
-
#include "gdb_expat.h"
-#include "gdb_string.h"
-#include "safe-ctype.h"
/* The maximum depth of <xi:include> nesting. No need to be miserly,
we just want to avoid running out of stack on loops. */
#define MAX_XINCLUDE_DEPTH 30
+/* Simplified XML parser infrastructure. */
+
/* A parsing level -- used to keep track of the current element
nesting. */
struct scope_level
throw_verror (XML_PARSE_ERROR, format, ap);
}
+/* Find the attribute named NAME in the set of parsed attributes
+ ATTRIBUTES. Returns NULL if not found. */
+
+struct gdb_xml_value *
+xml_find_attribute (VEC(gdb_xml_value_s) *attributes, const char *name)
+{
+ struct gdb_xml_value *value;
+ int ix;
+
+ for (ix = 0; VEC_iterate (gdb_xml_value_s, attributes, ix, value); ix++)
+ if (strcmp (value->name, name) == 0)
+ return value;
+
+ return NULL;
+}
+
/* Clean up a vector of parsed attribute values. */
static void
gdb_xml_error (parser, _("Required element <%s> is missing"),
element->name);
- /* Call the element processor. */
+ /* Call the element processor. */
if (scope->element != NULL && scope->element->end_handler)
{
char *body;
/* Initialize and return a parser. Register a cleanup to destroy the
parser. */
-struct gdb_xml_parser *
-gdb_xml_create_parser_and_cleanup (const char *name,
- const struct gdb_xml_element *elements,
- void *user_data)
+static struct gdb_xml_parser *
+gdb_xml_create_parser_and_cleanup_1 (const char *name,
+ const struct gdb_xml_element *elements,
+ void *user_data, struct cleanup **old_chain)
{
struct gdb_xml_parser *parser;
struct scope_level start_scope;
+ struct cleanup *dummy;
/* Initialize the parser. */
parser = XZALLOC (struct gdb_xml_parser);
if (parser->expat_parser == NULL)
{
xfree (parser);
- nomem (0);
+ malloc_failure (0);
}
parser->name = name;
start_scope.elements = elements;
VEC_safe_push (scope_level_s, parser->scopes, &start_scope);
- make_cleanup (gdb_xml_cleanup, parser);
+ if (old_chain == NULL)
+ old_chain = &dummy;
+ *old_chain = make_cleanup (gdb_xml_cleanup, parser);
return parser;
}
+/* Initialize and return a parser. Register a cleanup to destroy the
+ parser. */
+
+struct gdb_xml_parser *
+gdb_xml_create_parser_and_cleanup (const char *name,
+ const struct gdb_xml_element *elements,
+ void *user_data)
+{
+ struct cleanup *old_chain;
+
+ return gdb_xml_create_parser_and_cleanup_1 (name, elements, user_data,
+ &old_chain);
+}
+
/* External entity handler. The only external entities we support
are those compiled into GDB (we do not fetch entities from the
target). */
{
text = fetch_xml_builtin (parser->dtd_name);
if (text == NULL)
- internal_error (__FILE__, __LINE__, "could not locate built-in DTD %s",
+ internal_error (__FILE__, __LINE__,
+ _("could not locate built-in DTD %s"),
parser->dtd_name);
}
else
err = XML_UseForeignDTD (parser->expat_parser, XML_TRUE);
if (err != XML_ERROR_NONE)
internal_error (__FILE__, __LINE__,
- "XML_UseForeignDTD failed: %s", XML_ErrorString (err));
+ _("XML_UseForeignDTD failed: %s"),
+ XML_ErrorString (err));
}
/* Invoke PARSER on BUFFER. BUFFER is the data to parse, which
enum XML_Status status;
const char *error_string;
+ gdb_xml_debug (parser, _("Starting:\n%s"), buffer);
+
status = XML_Parse (parser->expat_parser, buffer, strlen (buffer), 1);
if (status == XML_STATUS_OK && parser->error.reason == 0)
else if (status == XML_STATUS_ERROR)
{
enum XML_Error err = XML_GetErrorCode (parser->expat_parser);
+
error_string = XML_ErrorString (err);
}
else
return -1;
}
+int
+gdb_xml_parse_quick (const char *name, const char *dtd_name,
+ const struct gdb_xml_element *elements,
+ const char *document, void *user_data)
+{
+ struct gdb_xml_parser *parser;
+ struct cleanup *back_to;
+ int result;
+
+ parser = gdb_xml_create_parser_and_cleanup_1 (name, elements,
+ user_data, &back_to);
+ if (dtd_name != NULL)
+ gdb_xml_use_dtd (parser, dtd_name);
+ result = gdb_xml_parse (parser, document);
+
+ do_cleanups (back_to);
+
+ return result;
+}
+
/* Parse a field VALSTR that we expect to contain an integer value.
The integer is returned in *VALP. The string is parsed with an
equivalent to strtoul.
return ret;
}
+/* A handler_data for yes/no boolean values. */
+
+const struct gdb_xml_enum gdb_xml_enums_boolean[] = {
+ { "yes", 1 },
+ { "no", 0 },
+ { NULL, 0 }
+};
+
/* Map NAME to VALUE. A struct gdb_xml_enum * should be saved as the
value of handler_data when using gdb_xml_parse_attr_enum to parse a
fixed list of possible strings. The list is terminated by an entry
void *ret;
for (enums = attribute->handler_data; enums->name != NULL; enums++)
- if (strcmp (enums->name, value) == 0)
+ if (strcasecmp (enums->name, value) == 0)
break;
if (enums->name == NULL)
void *user_data, VEC(gdb_xml_value_s) *attributes)
{
struct xinclude_parsing_data *data = user_data;
- char *href = VEC_index (gdb_xml_value_s, attributes, 0)->value;
+ char *href = xml_find_attribute (attributes, "href")->value;
struct cleanup *back_to;
char *text, *output;
- int ret;
gdb_xml_debug (parser, _("Processing XInclude of \"%s\""), href);
xml_fetch_another fetcher, void *fetcher_baton,
int depth)
{
- enum XML_Error err;
struct gdb_xml_parser *parser;
struct xinclude_parsing_data *data;
struct cleanup *back_to;
result = xstrdup (obstack_finish (&data->obstack));
if (depth == 0)
- gdb_xml_debug (parser, _("XInclude processing succeeded:\n%s"),
- result);
+ gdb_xml_debug (parser, _("XInclude processing succeeded."));
}
else
result = NULL;
do_cleanups (back_to);
return result;
}
+#endif /* HAVE_LIBEXPAT */
\f
/* Return an XML document which was compiled into GDB, from
return NULL;
}
-#endif /* HAVE_LIBEXPAT */
+/* A to_xfer_partial helper function which reads XML files which were
+ compiled into GDB. The target may call this function from its own
+ to_xfer_partial handler, after converting object and annex to the
+ appropriate filename. */
+
+LONGEST
+xml_builtin_xfer_partial (const char *filename,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ const char *buf;
+ LONGEST len_avail;
+
+ gdb_assert (readbuf != NULL && writebuf == NULL);
+ gdb_assert (filename != NULL);
+
+ buf = fetch_xml_builtin (filename);
+ if (buf == NULL)
+ return -1;
+
+ len_avail = strlen (buf);
+ if (offset >= len_avail)
+ return 0;
+
+ if (len > len_avail - offset)
+ len = len_avail - offset;
+ memcpy (readbuf, buf + offset, len);
+ return len;
+}
+\f
static void
show_debug_xml (struct ui_file *file, int from_tty,
fprintf_filtered (file, _("XML debugging is %s.\n"), value);
}
+void
+obstack_xml_printf (struct obstack *obstack, const char *format, ...)
+{
+ va_list ap;
+ const char *f;
+ const char *prev;
+ int percent = 0;
+
+ va_start (ap, format);
+
+ prev = format;
+ for (f = format; *f; f++)
+ {
+ if (percent)
+ {
+ switch (*f)
+ {
+ case 's':
+ {
+ char *p;
+ char *a = va_arg (ap, char *);
+
+ obstack_grow (obstack, prev, f - prev - 1);
+ p = xml_escape_text (a);
+ obstack_grow_str (obstack, p);
+ xfree (p);
+ prev = f + 1;
+ }
+ break;
+ }
+ percent = 0;
+ }
+ else if (*f == '%')
+ percent = 1;
+ }
+
+ obstack_grow_str (obstack, prev);
+ va_end (ap);
+}
+
+char *
+xml_fetch_content_from_file (const char *filename, void *baton)
+{
+ const char *dirname = baton;
+ FILE *file;
+ struct cleanup *back_to;
+ char *text;
+ size_t len, offset;
+
+ if (dirname && *dirname)
+ {
+ char *fullname = concat (dirname, "/", filename, (char *) NULL);
+
+ if (fullname == NULL)
+ malloc_failure (0);
+ file = fopen (fullname, FOPEN_RT);
+ xfree (fullname);
+ }
+ else
+ file = fopen (filename, FOPEN_RT);
+
+ if (file == NULL)
+ return NULL;
+
+ back_to = make_cleanup_fclose (file);
+
+ /* Read in the whole file, one chunk at a time. */
+ len = 4096;
+ offset = 0;
+ text = xmalloc (len);
+ make_cleanup (free_current_contents, &text);
+ while (1)
+ {
+ size_t bytes_read;
+
+ /* Continue reading where the last read left off. Leave at least
+ one byte so that we can NUL-terminate the result. */
+ bytes_read = fread (text + offset, 1, len - offset - 1, file);
+ if (ferror (file))
+ {
+ warning (_("Read error from \"%s\""), filename);
+ do_cleanups (back_to);
+ return NULL;
+ }
+
+ offset += bytes_read;
+
+ if (feof (file))
+ break;
+
+ len = len * 2;
+ text = xrealloc (text, len);
+ }
+
+ fclose (file);
+ discard_cleanups (back_to);
+
+ text[offset] = '\0';
+ return text;
+}
+
void _initialize_xml_support (void);
void
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