mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
257 lines
8.6 KiB
C
257 lines
8.6 KiB
C
/* Helper routines for parsing XML using Expat.
|
|
|
|
Copyright (C) 2006-2016 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/>. */
|
|
|
|
|
|
#ifndef XML_SUPPORT_H
|
|
#define XML_SUPPORT_H
|
|
|
|
#include "gdb_obstack.h"
|
|
#include "vec.h"
|
|
#include "xml-utils.h"
|
|
|
|
struct gdb_xml_parser;
|
|
struct gdb_xml_element;
|
|
struct gdb_xml_attribute;
|
|
|
|
/* Return an XML document which was compiled into GDB, from
|
|
the given FILENAME, or NULL if the file was not compiled in. */
|
|
|
|
const char *fetch_xml_builtin (const char *filename);
|
|
|
|
/* 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);
|
|
|
|
/* The text of compiled-in XML documents, from xml-builtin.c
|
|
(generated). */
|
|
|
|
extern const char *xml_builtin[][2];
|
|
|
|
/* Support for XInclude. */
|
|
|
|
/* Callback to fetch a new XML file, based on the provided HREF. */
|
|
|
|
typedef char *(*xml_fetch_another) (const char *href, void *baton);
|
|
|
|
/* Return a new string which is the expansion of TEXT after processing
|
|
<xi:include> tags. FETCHER will be called (with FETCHER_BATON) to
|
|
retrieve any new files. DEPTH should be zero on the initial call.
|
|
|
|
On failure, this function uses NAME in a warning and returns NULL.
|
|
It may throw an exception, but does not for XML parsing
|
|
problems. */
|
|
|
|
char *xml_process_xincludes (const char *name, const char *text,
|
|
xml_fetch_another fetcher, void *fetcher_baton,
|
|
int depth);
|
|
|
|
/* Simplified XML parser infrastructure. */
|
|
|
|
/* A name and value pair, used to record parsed attributes. */
|
|
|
|
struct gdb_xml_value
|
|
{
|
|
const char *name;
|
|
void *value;
|
|
};
|
|
typedef struct gdb_xml_value gdb_xml_value_s;
|
|
DEF_VEC_O(gdb_xml_value_s);
|
|
|
|
/* The type of an attribute handler.
|
|
|
|
PARSER is the current XML parser, which should be used to issue any
|
|
debugging or error messages. The second argument is the
|
|
corresponding attribute description, so that a single handler can
|
|
be used for multiple attributes; the attribute name is available
|
|
for error messages and the handler data is available for additional
|
|
customization (see gdb_xml_parse_attr_enum). VALUE is the string
|
|
value of the attribute.
|
|
|
|
The returned value should be freeable with xfree, and will be freed
|
|
after the start handler is called. Errors should be reported by
|
|
calling gdb_xml_error. */
|
|
|
|
typedef void *(gdb_xml_attribute_handler) (struct gdb_xml_parser *parser,
|
|
const struct gdb_xml_attribute *,
|
|
const char *value);
|
|
|
|
/* Flags for attributes. If no flags are specified, the attribute is
|
|
required. */
|
|
|
|
enum gdb_xml_attribute_flag
|
|
{
|
|
GDB_XML_AF_NONE,
|
|
GDB_XML_AF_OPTIONAL = 1 << 0, /* The attribute is optional. */
|
|
};
|
|
|
|
/* An expected attribute and the handler to call when it is
|
|
encountered. Arrays of struct gdb_xml_attribute are terminated
|
|
by an entry with NAME == NULL. */
|
|
|
|
struct gdb_xml_attribute
|
|
{
|
|
const char *name;
|
|
int flags;
|
|
gdb_xml_attribute_handler *handler;
|
|
const void *handler_data;
|
|
};
|
|
|
|
/* Flags for elements. If no flags are specified, the element is
|
|
required exactly once. */
|
|
|
|
enum gdb_xml_element_flag
|
|
{
|
|
GDB_XML_EF_NONE,
|
|
GDB_XML_EF_OPTIONAL = 1 << 0, /* The element is optional. */
|
|
GDB_XML_EF_REPEATABLE = 1 << 1, /* The element is repeatable. */
|
|
};
|
|
|
|
/* A handler called at the beginning of an element.
|
|
|
|
PARSER is the current XML parser, which should be used to issue any
|
|
debugging or error messages. ELEMENT is the current element.
|
|
USER_DATA is the opaque pointer supplied when the parser was
|
|
created. ATTRIBUTES is a vector of the values of any attributes
|
|
attached to this element.
|
|
|
|
The start handler will only be called if all the required
|
|
attributes were present and parsed successfully, and elements of
|
|
ATTRIBUTES are guaranteed to be in the same order used in
|
|
ELEMENT->ATTRIBUTES (not the order from the XML file). Accordingly
|
|
fixed offsets can be used to find any non-optional attributes as
|
|
long as no optional attributes precede them. */
|
|
|
|
typedef void (gdb_xml_element_start_handler)
|
|
(struct gdb_xml_parser *parser, const struct gdb_xml_element *element,
|
|
void *user_data, VEC(gdb_xml_value_s) *attributes);
|
|
|
|
/* A handler called at the end of an element.
|
|
|
|
PARSER, ELEMENT, and USER_DATA are as for the start handler. BODY
|
|
is any accumulated body text inside the element, with leading and
|
|
trailing whitespace removed. It will never be NULL. */
|
|
|
|
typedef void (gdb_xml_element_end_handler)
|
|
(struct gdb_xml_parser *, const struct gdb_xml_element *,
|
|
void *user_data, const char *body_text);
|
|
|
|
/* An expected element and the handlers to call when it is
|
|
encountered. Arrays of struct gdb_xml_element are terminated
|
|
by an entry with NAME == NULL. */
|
|
|
|
struct gdb_xml_element
|
|
{
|
|
const char *name;
|
|
const struct gdb_xml_attribute *attributes;
|
|
const struct gdb_xml_element *children;
|
|
int flags;
|
|
|
|
gdb_xml_element_start_handler *start_handler;
|
|
gdb_xml_element_end_handler *end_handler;
|
|
};
|
|
|
|
/* Associate DTD_NAME, which must be the name of a compiled-in DTD,
|
|
with PARSER. */
|
|
|
|
void gdb_xml_use_dtd (struct gdb_xml_parser *parser, const char *dtd_name);
|
|
|
|
/* Invoke PARSER on BUFFER. BUFFER is the data to parse, which
|
|
should be NUL-terminated.
|
|
|
|
The return value is 0 for success or -1 for error. It may throw,
|
|
but only if something unexpected goes wrong during parsing; parse
|
|
errors will be caught, warned about, and reported as failure. */
|
|
|
|
int gdb_xml_parse (struct gdb_xml_parser *parser, const char *buffer);
|
|
|
|
/* Parse a XML document. DOCUMENT is the data to parse, which should
|
|
be NUL-terminated. If non-NULL, use the compiled-in DTD named
|
|
DTD_NAME to drive the parsing.
|
|
|
|
The return value is 0 for success or -1 for error. It may throw,
|
|
but only if something unexpected goes wrong during parsing; parse
|
|
errors will be caught, warned about, and reported as failure. */
|
|
|
|
int gdb_xml_parse_quick (const char *name, const char *dtd_name,
|
|
const struct gdb_xml_element *elements,
|
|
const char *document, void *user_data);
|
|
|
|
/* Issue a debugging message from one of PARSER's handlers. */
|
|
|
|
void gdb_xml_debug (struct gdb_xml_parser *parser, const char *format, ...)
|
|
ATTRIBUTE_PRINTF (2, 0);
|
|
|
|
/* Issue an error message from one of PARSER's handlers, and stop
|
|
parsing. */
|
|
|
|
void gdb_xml_error (struct gdb_xml_parser *parser, const char *format, ...)
|
|
ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (2, 0);
|
|
|
|
/* 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);
|
|
|
|
/* Parse an integer attribute into a ULONGEST. */
|
|
|
|
extern gdb_xml_attribute_handler gdb_xml_parse_attr_ulongest;
|
|
|
|
/* 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
|
|
with NAME == NULL. */
|
|
|
|
struct gdb_xml_enum
|
|
{
|
|
const char *name;
|
|
ULONGEST value;
|
|
};
|
|
|
|
/* A handler_data for yes/no boolean values. */
|
|
extern const struct gdb_xml_enum gdb_xml_enums_boolean[];
|
|
|
|
extern gdb_xml_attribute_handler gdb_xml_parse_attr_enum;
|
|
|
|
/* Parse an integer string into a ULONGEST and return it, or call
|
|
gdb_xml_error if it could not be parsed. */
|
|
|
|
ULONGEST gdb_xml_parse_ulongest (struct gdb_xml_parser *parser,
|
|
const char *value);
|
|
|
|
/* Simple printf to obstack function. Current implemented formatters:
|
|
%s - grow an xml escaped text in OBSTACK. */
|
|
|
|
extern void obstack_xml_printf (struct obstack *obstack,
|
|
const char *format, ...)
|
|
ATTRIBUTE_PRINTF_2;
|
|
|
|
/* Open FILENAME, read all its text into memory, close it, and return
|
|
the text. If something goes wrong, return NULL and warn. */
|
|
|
|
extern char *xml_fetch_content_from_file (const char *filename,
|
|
void *baton);
|
|
|
|
#endif
|