/* Helper routines for parsing XML using Expat.
- Copyright (C) 2006-2017 Free Software Foundation, Inc.
+ Copyright (C) 2006-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "gdbcmd.h"
+#include "xml-builtin.h"
#include "xml-support.h"
-#include "filestuff.h"
+#include "gdbsupport/filestuff.h"
#include "safe-ctype.h"
#include <vector>
+#include <string>
/* Debugging flag. */
-static int debug_xml;
+static bool debug_xml;
/* The contents of this file are only useful if XML support is
available. */
explicit scope_level (const gdb_xml_element *elements_ = NULL)
: elements (elements_),
element (NULL),
- seen (0),
- body (NULL)
+ seen (0)
{}
- scope_level (scope_level &&other) noexcept
- : elements (other.elements),
- element (other.element),
- seen (other.seen),
- body (other.body)
- {
- if (this != &other)
- other.body = NULL;
- }
-
- ~scope_level ()
- {
- if (this->body)
- {
- obstack_free (this->body, NULL);
- xfree (this->body);
- }
- }
-
/* Elements we allow at this level. */
const struct gdb_xml_element *elements;
optional and repeatable checking). */
unsigned int seen;
- /* Body text accumulation. This is an owning pointer. */
- struct obstack *body;
+ /* Body text accumulation. */
+ std::string body;
};
/* The parser itself, and our additional state. */
void *user_data);
~gdb_xml_parser();
- XML_Parser expat_parser; /* The underlying expat parser. */
+ /* Associate DTD_NAME, which must be the name of a compiled-in DTD,
+ with the parser. */
+ void use_dtd (const char *dtd_name);
+
+ /* Return the name of the expected / default DTD, if specified. */
+ const char *dtd_name ()
+ { return m_dtd_name; }
+
+ /* Invoke the parser on BUFFER. BUFFER is the data to parse, which
+ should be NUL-terminated.
- const char *name; /* Name of this parser. */
- void *user_data; /* The user's callback data, for handlers. */
+ 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 parse (const char *buffer);
+
+ /* Issue a debugging message. */
+ void vdebug (const char *format, va_list ap)
+ ATTRIBUTE_PRINTF (2, 0);
+
+ /* Issue an error message, and stop parsing. */
+ void verror (const char *format, va_list ap)
+ ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (2, 0);
+
+ void body_text (const XML_Char *text, int length);
+ void start_element (const XML_Char *name, const XML_Char **attrs);
+ void end_element (const XML_Char *name);
+
+ /* Return the name of this parser. */
+ const char *name ()
+ { return m_name; }
+
+ /* Return the user's callback data, for handlers. */
+ void *user_data ()
+ { return m_user_data; };
+
+ /* Are we the special <xi:include> parser? */
+ void set_is_xinclude (bool is_xinclude)
+ { m_is_xinclude = is_xinclude; }
+
+ /* A thrown error, if any. */
+ void set_error (gdb_exception &&error)
+ {
+ m_error = std::move (error);
+#ifdef HAVE_XML_STOPPARSER
+ XML_StopParser (m_expat_parser, XML_FALSE);
+#endif
+ }
+
+ /* Return the underlying expat parser. */
+ XML_Parser expat_parser ()
+ { return m_expat_parser; }
+
+private:
+ /* The underlying expat parser. */
+ XML_Parser m_expat_parser;
+
+ /* Name of this parser. */
+ const char *m_name;
+
+ /* The user's callback data, for handlers. */
+ void *m_user_data;
/* Scoping stack. */
- std::vector<scope_level> scopes;
+ std::vector<scope_level> m_scopes;
+
+/* A thrown error, if any. */
+ struct gdb_exception m_error;
- struct gdb_exception error; /* A thrown error, if any. */
- int last_line; /* The line of the thrown error, or 0. */
+ /* The line of the thrown error, or 0. */
+ int m_last_line;
- const char *dtd_name; /* The name of the expected / default DTD,
- if specified. */
- bool is_xinclude; /* Are we the special <xi:include> parser? */
+ /* The name of the expected / default DTD, if specified. */
+ const char *m_dtd_name;
+
+ /* Are we the special <xi:include> parser? */
+ bool m_is_xinclude;
};
/* Process some body text. We accumulate the text for later use; it's
wrong to do anything with it immediately, because a single block of
text might be broken up into multiple calls to this function. */
+void
+gdb_xml_parser::body_text (const XML_Char *text, int length)
+{
+ if (m_error.reason < 0)
+ return;
+
+ scope_level &scope = m_scopes.back ();
+ scope.body.append (text, length);
+}
+
static void
gdb_xml_body_text (void *data, const XML_Char *text, int length)
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data;
- if (parser->error.reason < 0)
- return;
+ parser->body_text (text, length);
+}
- scope_level &scope = parser->scopes.back ();
+/* Issue a debugging message from one of PARSER's handlers. */
- if (scope.body == NULL)
- {
- scope.body = XCNEW (struct obstack);
- obstack_init (scope.body);
- }
+void
+gdb_xml_parser::vdebug (const char *format, va_list ap)
+{
+ int line = XML_GetCurrentLineNumber (m_expat_parser);
- obstack_grow (scope.body, text, length);
+ std::string message = string_vprintf (format, ap);
+ if (line)
+ fprintf_unfiltered (gdb_stderr, "%s (line %d): %s\n",
+ m_name, line, message.c_str ());
+ else
+ fprintf_unfiltered (gdb_stderr, "%s: %s\n",
+ m_name, message.c_str ());
}
-/* Issue a debugging message from one of PARSER's handlers. */
-
void
gdb_xml_debug (struct gdb_xml_parser *parser, const char *format, ...)
{
- int line = XML_GetCurrentLineNumber (parser->expat_parser);
- va_list ap;
- char *message;
-
if (!debug_xml)
return;
+ va_list ap;
va_start (ap, format);
- message = xstrvprintf (format, ap);
- if (line)
- fprintf_unfiltered (gdb_stderr, "%s (line %d): %s\n",
- parser->name, line, message);
- else
- fprintf_unfiltered (gdb_stderr, "%s: %s\n",
- parser->name, message);
- xfree (message);
+ parser->vdebug (format, ap);
+ va_end (ap);
}
/* Issue an error message from one of PARSER's handlers, and stop
parsing. */
+void
+gdb_xml_parser::verror (const char *format, va_list ap)
+{
+ int line = XML_GetCurrentLineNumber (m_expat_parser);
+
+ m_last_line = line;
+ throw_verror (XML_PARSE_ERROR, format, ap);
+}
+
void
gdb_xml_error (struct gdb_xml_parser *parser, const char *format, ...)
{
- int line = XML_GetCurrentLineNumber (parser->expat_parser);
va_list ap;
-
- parser->last_line = line;
va_start (ap, format);
- throw_verror (XML_PARSE_ERROR, format, ap);
+ parser->verror (format, ap);
+ va_end (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)
+xml_find_attribute (std::vector<gdb_xml_value> &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;
+ for (gdb_xml_value &value : attributes)
+ if (strcmp (value.name, name) == 0)
+ return &value;
return NULL;
}
-/* Clean up a vector of parsed attribute values. */
+/* Handle the start of an element. NAME is the element, and ATTRS are
+ the names and values of this element's attributes. */
-static void
-gdb_xml_values_cleanup (void *data)
+void
+gdb_xml_parser::start_element (const XML_Char *name,
+ const XML_Char **attrs)
{
- VEC(gdb_xml_value_s) **values = (VEC(gdb_xml_value_s) **) data;
- struct gdb_xml_value *value;
- int ix;
-
- for (ix = 0; VEC_iterate (gdb_xml_value_s, *values, ix, value); ix++)
- xfree (value->value);
- VEC_free (gdb_xml_value_s, *values);
-}
-
-/* Handle the start of an element. DATA is our local XML parser, NAME
- is the element, and ATTRS are the names and values of this
- element's attributes. */
+ if (m_error.reason < 0)
+ return;
-static void
-gdb_xml_start_element (void *data, const XML_Char *name,
- const XML_Char **attrs)
-{
- struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data;
const struct gdb_xml_element *element;
const struct gdb_xml_attribute *attribute;
- VEC(gdb_xml_value_s) *attributes = NULL;
unsigned int seen;
- struct cleanup *back_to;
/* Push an error scope. If we return or throw an exception before
filling this in, it will tell us to ignore children of this
recursion unrolls all such elements will have been popped back
already, but if one of those pushes reallocates the vector,
previous element references will be invalidated. */
- parser->scopes.emplace_back ();
+ m_scopes.emplace_back ();
/* Get a reference to the current scope. */
- scope_level &scope = parser->scopes[parser->scopes.size () - 2];
+ scope_level &scope = m_scopes[m_scopes.size () - 2];
- gdb_xml_debug (parser, _("Entering element <%s>"), name);
+ gdb_xml_debug (this, _("Entering element <%s>"), name);
/* Find this element in the list of the current scope's allowed
children. Record that we've seen it. */
/* If we're working on XInclude, <xi:include> can be the child
of absolutely anything. Copy the previous scope's element
list into the new scope even if there was no match. */
- if (parser->is_xinclude)
+ if (m_is_xinclude)
{
- XML_DefaultCurrent (parser->expat_parser);
+ XML_DefaultCurrent (m_expat_parser);
- scope_level &unknown_scope = parser->scopes.back ();
+ scope_level &unknown_scope = m_scopes.back ();
unknown_scope.elements = scope.elements;
return;
}
- gdb_xml_debug (parser, _("Element <%s> unknown"), name);
+ gdb_xml_debug (this, _("Element <%s> unknown"), name);
return;
}
if (!(element->flags & GDB_XML_EF_REPEATABLE) && (seen & scope.seen))
- gdb_xml_error (parser, _("Element <%s> only expected once"), name);
+ gdb_xml_error (this, _("Element <%s> only expected once"), name);
scope.seen |= seen;
- back_to = make_cleanup (gdb_xml_values_cleanup, &attributes);
+ std::vector<gdb_xml_value> attributes;
for (attribute = element->attributes;
attribute != NULL && attribute->name != NULL;
const char *val = NULL;
const XML_Char **p;
void *parsed_value;
- struct gdb_xml_value new_value;
for (p = attrs; *p != NULL; p += 2)
if (!strcmp (attribute->name, p[0]))
if (*p != NULL && val == NULL)
{
- gdb_xml_debug (parser, _("Attribute \"%s\" missing a value"),
+ gdb_xml_debug (this, _("Attribute \"%s\" missing a value"),
attribute->name);
continue;
}
if (*p == NULL && !(attribute->flags & GDB_XML_AF_OPTIONAL))
{
- gdb_xml_error (parser, _("Required attribute \"%s\" of "
+ gdb_xml_error (this, _("Required attribute \"%s\" of "
"<%s> not specified"),
attribute->name, element->name);
continue;
if (*p == NULL)
continue;
- gdb_xml_debug (parser, _("Parsing attribute %s=\"%s\""),
+ gdb_xml_debug (this, _("Parsing attribute %s=\"%s\""),
attribute->name, val);
if (attribute->handler)
- parsed_value = attribute->handler (parser, attribute, val);
+ parsed_value = attribute->handler (this, attribute, val);
else
parsed_value = xstrdup (val);
- new_value.name = attribute->name;
- new_value.value = parsed_value;
- VEC_safe_push (gdb_xml_value_s, attributes, &new_value);
+ attributes.emplace_back (attribute->name, parsed_value);
}
/* Check for unrecognized attributes. */
break;
if (attribute == NULL || attribute->name == NULL)
- gdb_xml_debug (parser, _("Ignoring unknown attribute %s"), *p);
+ gdb_xml_debug (this, _("Ignoring unknown attribute %s"), *p);
}
}
/* Call the element handler if there is one. */
if (element->start_handler)
- element->start_handler (parser, element, parser->user_data, attributes);
+ element->start_handler (this, element, m_user_data, attributes);
/* Fill in a new scope level. Note that we must delay getting a
back reference till here because above we might have recursed,
which may have reallocated the vector which invalidates
iterators/pointers/references. */
- scope_level &new_scope = parser->scopes.back ();
+ scope_level &new_scope = m_scopes.back ();
new_scope.element = element;
new_scope.elements = element->children;
-
- do_cleanups (back_to);
}
/* Wrapper for gdb_xml_start_element, to prevent throwing exceptions
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data;
- if (parser->error.reason < 0)
- return;
-
- TRY
+ try
{
- gdb_xml_start_element (data, name, attrs);
+ parser->start_element (name, attrs);
}
- CATCH (ex, RETURN_MASK_ALL)
+ catch (gdb_exception &ex)
{
- parser->error = ex;
-#ifdef HAVE_XML_STOPPARSER
- XML_StopParser (parser->expat_parser, XML_FALSE);
-#endif
+ parser->set_error (std::move (ex));
}
- END_CATCH
}
-/* Handle the end of an element. PARSER is our local XML parser, and
- NAME is the current element. */
+/* Handle the end of an element. NAME is the current element. */
-static void
-gdb_xml_end_element (gdb_xml_parser *parser, const XML_Char *name)
+void
+gdb_xml_parser::end_element (const XML_Char *name)
{
- struct scope_level *scope = &parser->scopes.back ();
+ if (m_error.reason < 0)
+ return;
+
+ struct scope_level *scope = &m_scopes.back ();
const struct gdb_xml_element *element;
unsigned int seen;
- gdb_xml_debug (parser, _("Leaving element <%s>"), name);
+ gdb_xml_debug (this, _("Leaving element <%s>"), name);
for (element = scope->elements, seen = 1;
element != NULL && element->name != NULL;
element++, seen <<= 1)
if ((scope->seen & seen) == 0
&& (element->flags & GDB_XML_EF_OPTIONAL) == 0)
- gdb_xml_error (parser, _("Required element <%s> is missing"),
+ gdb_xml_error (this, _("Required element <%s> is missing"),
element->name);
/* Call the element processor. */
if (scope->element != NULL && scope->element->end_handler)
{
- const char *scope_body;
+ const char *body;
- if (scope->body == NULL)
- scope_body = "";
+ if (scope->body.empty ())
+ body = "";
else
{
int length;
- length = obstack_object_size (scope->body);
- obstack_1grow (scope->body, '\0');
- char *body = (char *) obstack_finish (scope->body);
+ length = scope->body.size ();
+ body = scope->body.c_str ();
/* Strip leading and trailing whitespace. */
- while (length > 0 && ISSPACE (body[length-1]))
- body[--length] = '\0';
+ while (length > 0 && ISSPACE (body[length - 1]))
+ length--;
+ scope->body.erase (length);
while (*body && ISSPACE (*body))
body++;
-
- scope_body = body;
}
- scope->element->end_handler (parser, scope->element, parser->user_data,
- scope_body);
+ scope->element->end_handler (this, scope->element,
+ m_user_data, body);
}
else if (scope->element == NULL)
- XML_DefaultCurrent (parser->expat_parser);
+ XML_DefaultCurrent (m_expat_parser);
/* Pop the scope level. */
- parser->scopes.pop_back ();
+ m_scopes.pop_back ();
}
/* Wrapper for gdb_xml_end_element, to prevent throwing exceptions
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data;
- if (parser->error.reason < 0)
- return;
-
- TRY
+ try
{
- gdb_xml_end_element (parser, name);
+ parser->end_element (name);
}
- CATCH (ex, RETURN_MASK_ALL)
+ catch (gdb_exception &ex)
{
- parser->error = ex;
-#ifdef HAVE_XML_STOPPARSER
- XML_StopParser (parser->expat_parser, XML_FALSE);
-#endif
+ parser->set_error (std::move (ex));
}
- END_CATCH
}
/* Free a parser and all its associated state. */
gdb_xml_parser::~gdb_xml_parser ()
{
- XML_ParserFree (this->expat_parser);
+ XML_ParserFree (m_expat_parser);
}
/* Initialize a parser. */
-gdb_xml_parser::gdb_xml_parser (const char *name_,
+gdb_xml_parser::gdb_xml_parser (const char *name,
const gdb_xml_element *elements,
- void *user_data_)
- : name (name_),
- user_data (user_data_),
- error (exception_none),
- last_line (0),
- dtd_name (NULL),
- is_xinclude (false)
-{
- this->expat_parser = XML_ParserCreateNS (NULL, '!');
- if (this->expat_parser == NULL)
+ void *user_data)
+ : m_name (name),
+ m_user_data (user_data),
+ m_last_line (0),
+ m_dtd_name (NULL),
+ m_is_xinclude (false)
+{
+ m_expat_parser = XML_ParserCreateNS (NULL, '!');
+ if (m_expat_parser == NULL)
malloc_failure (0);
- XML_SetUserData (this->expat_parser, this);
+ XML_SetUserData (m_expat_parser, this);
/* Set the callbacks. */
- XML_SetElementHandler (this->expat_parser, gdb_xml_start_element_wrapper,
+ XML_SetElementHandler (m_expat_parser, gdb_xml_start_element_wrapper,
gdb_xml_end_element_wrapper);
- XML_SetCharacterDataHandler (this->expat_parser, gdb_xml_body_text);
+ XML_SetCharacterDataHandler (m_expat_parser, gdb_xml_body_text);
/* Initialize the outer scope. */
- this->scopes.emplace_back (elements);
+ m_scopes.emplace_back (elements);
}
/* External entity handler. The only external entities we support
const XML_Char *systemId,
const XML_Char *publicId)
{
- struct gdb_xml_parser *parser
- = (struct gdb_xml_parser *) XML_GetUserData (expat_parser);
XML_Parser entity_parser;
const char *text;
enum XML_Status status;
if (systemId == NULL)
{
- text = fetch_xml_builtin (parser->dtd_name);
+ gdb_xml_parser *parser
+ = (gdb_xml_parser *) XML_GetUserData (expat_parser);
+
+ text = fetch_xml_builtin (parser->dtd_name ());
if (text == NULL)
internal_error (__FILE__, __LINE__,
_("could not locate built-in DTD %s"),
- parser->dtd_name);
+ parser->dtd_name ());
}
else
{
return XML_STATUS_ERROR;
}
- entity_parser = XML_ExternalEntityParserCreate (expat_parser, context, NULL);
+ entity_parser = XML_ExternalEntityParserCreate (expat_parser,
+ context, NULL);
/* Don't use our handlers for the contents of the DTD. Just let expat
process it. */
return status;
}
-/* 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)
+gdb_xml_parser::use_dtd (const char *dtd_name)
{
enum XML_Error err;
- parser->dtd_name = dtd_name;
+ m_dtd_name = dtd_name;
- XML_SetParamEntityParsing (parser->expat_parser,
+ XML_SetParamEntityParsing (m_expat_parser,
XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE);
- XML_SetExternalEntityRefHandler (parser->expat_parser,
+ XML_SetExternalEntityRefHandler (m_expat_parser,
gdb_xml_fetch_external_entity);
/* Even if no DTD is provided, use the built-in DTD anyway. */
- err = XML_UseForeignDTD (parser->expat_parser, XML_TRUE);
+ err = XML_UseForeignDTD (m_expat_parser, XML_TRUE);
if (err != XML_ERROR_NONE)
internal_error (__FILE__, __LINE__,
_("XML_UseForeignDTD failed: %s"),
errors will be caught, warned about, and reported as failure. */
int
-gdb_xml_parse (struct gdb_xml_parser *parser, const char *buffer)
+gdb_xml_parser::parse (const char *buffer)
{
enum XML_Status status;
const char *error_string;
- gdb_xml_debug (parser, _("Starting:\n%s"), buffer);
+ gdb_xml_debug (this, _("Starting:\n%s"), buffer);
- status = XML_Parse (parser->expat_parser, buffer, strlen (buffer), 1);
+ status = XML_Parse (m_expat_parser, buffer, strlen (buffer), 1);
- if (status == XML_STATUS_OK && parser->error.reason == 0)
+ if (status == XML_STATUS_OK && m_error.reason == 0)
return 0;
- if (parser->error.reason == RETURN_ERROR
- && parser->error.error == XML_PARSE_ERROR)
+ if (m_error.reason == RETURN_ERROR
+ && m_error.error == XML_PARSE_ERROR)
{
- gdb_assert (parser->error.message != NULL);
- error_string = parser->error.message;
+ gdb_assert (m_error.message != NULL);
+ error_string = m_error.what ();
}
else if (status == XML_STATUS_ERROR)
{
- enum XML_Error err = XML_GetErrorCode (parser->expat_parser);
+ enum XML_Error err = XML_GetErrorCode (m_expat_parser);
error_string = XML_ErrorString (err);
}
else
{
- gdb_assert (parser->error.reason < 0);
- throw_exception (parser->error);
+ gdb_assert (m_error.reason < 0);
+ throw_exception (std::move (m_error));
}
- if (parser->last_line != 0)
- warning (_("while parsing %s (at line %d): %s"), parser->name,
- parser->last_line, error_string);
+ if (m_last_line != 0)
+ warning (_("while parsing %s (at line %d): %s"), m_name,
+ m_last_line, error_string);
else
- warning (_("while parsing %s: %s"), parser->name, error_string);
+ warning (_("while parsing %s: %s"), m_name, error_string);
return -1;
}
{
gdb_xml_parser parser (name, elements, user_data);
if (dtd_name != NULL)
- gdb_xml_use_dtd (&parser, dtd_name);
- return gdb_xml_parse (&parser, document);
+ parser.use_dtd (dtd_name);
+ return parser.parse (document);
}
/* Parse a field VALSTR that we expect to contain an integer value.
struct xinclude_parsing_data
{
- xinclude_parsing_data (xml_fetch_another fetcher_, void *fetcher_baton_,
+ xinclude_parsing_data (std::string &output_,
+ xml_fetch_another fetcher_, void *fetcher_baton_,
int include_depth_)
- : skip_depth (0),
+ : output (output_),
+ skip_depth (0),
include_depth (include_depth_),
fetcher (fetcher_),
fetcher_baton (fetcher_baton_)
- {
- obstack_init (&this->obstack);
- }
-
- ~xinclude_parsing_data ()
- {
- obstack_free (&this->obstack, NULL);
- }
+ {}
- /* The obstack to build the output in. */
- struct obstack obstack;
+ /* Where the output goes. */
+ std::string &output;
/* A count indicating whether we are in an element whose
children should not be copied to the output, and if so,
static void
xinclude_start_include (struct gdb_xml_parser *parser,
const struct gdb_xml_element *element,
- void *user_data, VEC(gdb_xml_value_s) *attributes)
+ void *user_data,
+ std::vector<gdb_xml_value> &attributes)
{
struct xinclude_parsing_data *data
= (struct xinclude_parsing_data *) user_data;
- char *href = (char *) xml_find_attribute (attributes, "href")->value;
- struct cleanup *back_to;
- char *text, *output;
+ char *href = (char *) xml_find_attribute (attributes, "href")->value.get ();
gdb_xml_debug (parser, _("Processing XInclude of \"%s\""), href);
gdb_xml_error (parser, _("Maximum XInclude depth (%d) exceeded"),
MAX_XINCLUDE_DEPTH);
- text = data->fetcher (href, data->fetcher_baton);
- if (text == NULL)
+ gdb::optional<gdb::char_vector> text
+ = data->fetcher (href, data->fetcher_baton);
+ if (!text)
gdb_xml_error (parser, _("Could not load XML document \"%s\""), href);
- back_to = make_cleanup (xfree, text);
- output = xml_process_xincludes (parser->name, text, data->fetcher,
- data->fetcher_baton,
- data->include_depth + 1);
- if (output == NULL)
+ if (!xml_process_xincludes (data->output, parser->name (),
+ text->data (), data->fetcher,
+ data->fetcher_baton,
+ data->include_depth + 1))
gdb_xml_error (parser, _("Parsing \"%s\" failed"), href);
- obstack_grow (&data->obstack, output, strlen (output));
- xfree (output);
-
- do_cleanups (back_to);
-
data->skip_depth++;
}
xml_xinclude_default (void *data_, const XML_Char *s, int len)
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data_;
- struct xinclude_parsing_data *data
- = (struct xinclude_parsing_data *) parser->user_data;
+ xinclude_parsing_data *data = (xinclude_parsing_data *) parser->user_data ();
/* If we are inside of e.g. xi:include or the DTD, don't save this
string. */
/* Otherwise just add it to the end of the document we're building
up. */
- obstack_grow (&data->obstack, s, len);
+ data->output.append (s, len);
}
static void XMLCALL
int has_internal_subset)
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data_;
- struct xinclude_parsing_data *data
- = (struct xinclude_parsing_data *) parser->user_data;
+ xinclude_parsing_data *data = (xinclude_parsing_data *) parser->user_data ();
/* Don't print out the doctype, or the contents of the DTD internal
subset, if any. */
xml_xinclude_end_doctype (void *data_)
{
struct gdb_xml_parser *parser = (struct gdb_xml_parser *) data_;
- struct xinclude_parsing_data *data
- = (struct xinclude_parsing_data *) parser->user_data;
+ xinclude_parsing_data *data = (xinclude_parsing_data *) parser->user_data ();
data->skip_depth--;
}
/* The main entry point for <xi:include> processing. */
-char *
-xml_process_xincludes (const char *name, const char *text,
+bool
+xml_process_xincludes (std::string &result,
+ const char *name, const char *text,
xml_fetch_another fetcher, void *fetcher_baton,
int depth)
{
- char *result = NULL;
-
- xinclude_parsing_data data (fetcher, fetcher_baton, depth);
+ xinclude_parsing_data data (result, fetcher, fetcher_baton, depth);
gdb_xml_parser parser (name, xinclude_elements, &data);
- parser.is_xinclude = true;
+ parser.set_is_xinclude (true);
- XML_SetCharacterDataHandler (parser.expat_parser, NULL);
- XML_SetDefaultHandler (parser.expat_parser, xml_xinclude_default);
+ XML_SetCharacterDataHandler (parser.expat_parser (), NULL);
+ XML_SetDefaultHandler (parser.expat_parser (), xml_xinclude_default);
/* Always discard the XML version declarations; the only important
thing this provides is encoding, and our result will have been
converted to UTF-8. */
- XML_SetXmlDeclHandler (parser.expat_parser, xml_xinclude_xml_decl);
+ XML_SetXmlDeclHandler (parser.expat_parser (), xml_xinclude_xml_decl);
if (depth > 0)
/* Discard the doctype for included documents. */
- XML_SetDoctypeDeclHandler (parser.expat_parser,
+ XML_SetDoctypeDeclHandler (parser.expat_parser (),
xml_xinclude_start_doctype,
xml_xinclude_end_doctype);
- gdb_xml_use_dtd (&parser, "xinclude.dtd");
+ parser.use_dtd ("xinclude.dtd");
- if (gdb_xml_parse (&parser, text) == 0)
+ if (parser.parse (text) == 0)
{
- obstack_1grow (&data.obstack, '\0');
- result = xstrdup ((const char *) obstack_finish (&data.obstack));
-
if (depth == 0)
gdb_xml_debug (&parser, _("XInclude processing succeeded."));
+ return true;
}
- else
- result = NULL;
- return result;
+ return false;
}
#endif /* HAVE_LIBEXPAT */
\f
const char *
fetch_xml_builtin (const char *filename)
{
- const char *(*p)[2];
+ const char *const (*p)[2];
for (p = xml_builtin; (*p)[0]; p++)
if (strcmp ((*p)[0], filename) == 0)
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 *
+gdb::optional<gdb::char_vector>
xml_fetch_content_from_file (const char *filename, void *baton)
{
const char *dirname = (const char *) baton;
- FILE *file;
- struct cleanup *back_to;
- char *text;
- size_t len, offset;
+ gdb_file_up file;
if (dirname && *dirname)
{
char *fullname = concat (dirname, "/", filename, (char *) NULL);
- if (fullname == NULL)
- malloc_failure (0);
file = gdb_fopen_cloexec (fullname, FOPEN_RT);
xfree (fullname);
}
file = gdb_fopen_cloexec (filename, FOPEN_RT);
if (file == NULL)
- return NULL;
+ return {};
- back_to = make_cleanup_fclose (file);
+ /* Read in the whole file. */
- /* Read in the whole file, one chunk at a time. */
- len = 4096;
- offset = 0;
- text = (char *) 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;
- }
+ size_t len;
- offset += bytes_read;
+ if (fseek (file.get (), 0, SEEK_END) == -1)
+ perror_with_name (_("seek to end of file"));
+ len = ftell (file.get ());
+ rewind (file.get ());
- if (feof (file))
- break;
+ gdb::char_vector text (len + 1);
- len = len * 2;
- text = (char *) xrealloc (text, len);
+ if (fread (text.data (), 1, len, file.get ()) != len
+ || ferror (file.get ()))
+ {
+ warning (_("Read error from \"%s\""), filename);
+ return {};
}
- fclose (file);
- discard_cleanups (back_to);
-
- text[offset] = '\0';
+ text.back () = '\0';
return text;
}
-void _initialize_xml_support (void);
-
void
_initialize_xml_support (void)
{
projects / deliverable / binutils-gdb.git / blobdiff