mirror of
https://github.com/holub/mame
synced 2025-06-02 10:59:52 +03:00
c8f1954467
* move stuff to namespace util::xml * scope down some enums * split config load/save delegate types * make config load take const so it can't mangle data
905 lines
24 KiB
C++
905 lines
24 KiB
C++
// license:BSD-3-Clause
|
|
// copyright-holders:Aaron Giles
|
|
/***************************************************************************
|
|
|
|
xmlfile.c
|
|
|
|
XML file parsing code.
|
|
|
|
***************************************************************************/
|
|
|
|
#include <assert.h>
|
|
|
|
#include "xmlfile.h"
|
|
|
|
#include <expat.h>
|
|
|
|
#include <algorithm>
|
|
#include <cctype>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
|
|
|
|
namespace util { namespace xml {
|
|
|
|
/***************************************************************************
|
|
CONSTANTS
|
|
***************************************************************************/
|
|
|
|
#define TEMP_BUFFER_SIZE 4096
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
TYPE DEFINITIONS
|
|
***************************************************************************/
|
|
|
|
struct parse_info
|
|
{
|
|
XML_Parser parser;
|
|
data_node * rootnode;
|
|
data_node * curnode;
|
|
uint32_t flags;
|
|
};
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
PROTOTYPES
|
|
***************************************************************************/
|
|
|
|
/* expat interfaces */
|
|
static bool expat_setup_parser(parse_info &info, parse_options const *opts);
|
|
static void expat_element_start(void *data, const XML_Char *name, const XML_Char **attributes);
|
|
static void expat_data(void *data, const XML_Char *s, int len);
|
|
static void expat_element_end(void *data, const XML_Char *name);
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
XML FILE OBJECTS
|
|
***************************************************************************/
|
|
|
|
/*-------------------------------------------------
|
|
file_create - create a new xml file
|
|
object
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::file_create()
|
|
{
|
|
try { return new data_node(); }
|
|
catch (...) { return nullptr; }
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
file_read - parse an XML file into its
|
|
nodes
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::file_read(util::core_file &file, parse_options const *opts)
|
|
{
|
|
parse_info info;
|
|
int done;
|
|
|
|
/* set up the parser */
|
|
if (!expat_setup_parser(info, opts))
|
|
return nullptr;
|
|
|
|
/* loop through the file and parse it */
|
|
do
|
|
{
|
|
char tempbuf[TEMP_BUFFER_SIZE];
|
|
|
|
/* read as much as we can */
|
|
int bytes = file.read(tempbuf, sizeof(tempbuf));
|
|
done = file.eof();
|
|
|
|
/* parse the data */
|
|
if (XML_Parse(info.parser, tempbuf, bytes, done) == XML_STATUS_ERROR)
|
|
{
|
|
if (opts != nullptr && opts->error != nullptr)
|
|
{
|
|
opts->error->error_message = XML_ErrorString(XML_GetErrorCode(info.parser));
|
|
opts->error->error_line = XML_GetCurrentLineNumber(info.parser);
|
|
opts->error->error_column = XML_GetCurrentColumnNumber(info.parser);
|
|
}
|
|
|
|
info.rootnode->file_free();
|
|
XML_ParserFree(info.parser);
|
|
return nullptr;
|
|
}
|
|
}
|
|
while (!done);
|
|
|
|
/* free the parser */
|
|
XML_ParserFree(info.parser);
|
|
|
|
/* return the root node */
|
|
return info.rootnode;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
string_read - parse an XML string into its
|
|
nodes
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::string_read(const char *string, parse_options const *opts)
|
|
{
|
|
parse_info info;
|
|
int length = (int)strlen(string);
|
|
|
|
/* set up the parser */
|
|
if (!expat_setup_parser(info, opts))
|
|
return nullptr;
|
|
|
|
/* parse the data */
|
|
if (XML_Parse(info.parser, string, length, 1) == XML_STATUS_ERROR)
|
|
{
|
|
if (opts != nullptr && opts->error != nullptr)
|
|
{
|
|
opts->error->error_message = XML_ErrorString(XML_GetErrorCode(info.parser));
|
|
opts->error->error_line = XML_GetCurrentLineNumber(info.parser);
|
|
opts->error->error_column = XML_GetCurrentColumnNumber(info.parser);
|
|
}
|
|
|
|
info.rootnode->file_free();
|
|
XML_ParserFree(info.parser);
|
|
return nullptr;
|
|
}
|
|
|
|
/* free the parser */
|
|
XML_ParserFree(info.parser);
|
|
|
|
/* return the root node */
|
|
return info.rootnode;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
file_write - write an XML tree to a file
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::file_write(util::core_file &file) const
|
|
{
|
|
/* ensure this is a root node */
|
|
if (get_name())
|
|
return;
|
|
|
|
/* output a simple header */
|
|
file.printf("<?xml version=\"1.0\"?>\n");
|
|
file.printf("<!-- This file is autogenerated; comments and unknown tags will be stripped -->\n");
|
|
|
|
/* loop over children of the root and output */
|
|
for (data_node const *node = get_first_child(); node; node = node->get_next_sibling())
|
|
node->write_recursive(0, file);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
file_free - free an XML file object
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::file_free()
|
|
{
|
|
/* ensure this is a root node */
|
|
if (get_name())
|
|
return;
|
|
|
|
delete this;
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
XML NODE MANAGEMENT
|
|
***************************************************************************/
|
|
|
|
data_node::data_node()
|
|
: line(0)
|
|
, m_next(nullptr)
|
|
, m_first_child(nullptr)
|
|
, m_name()
|
|
, m_value()
|
|
, m_parent(nullptr)
|
|
, m_attributes()
|
|
{
|
|
}
|
|
|
|
data_node::data_node(data_node *parent, const char *name, const char *value)
|
|
: line(0)
|
|
, m_next(nullptr)
|
|
, m_first_child(nullptr)
|
|
, m_name(name ? name : "")
|
|
, m_value(value ? value : "")
|
|
, m_parent(parent)
|
|
, m_attributes()
|
|
{
|
|
std::transform(m_name.begin(), m_name.end(), m_name.begin(), [] (char ch) { return std::tolower(uint8_t(ch)); });
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
free_node_recursive - recursively free
|
|
the data allocated to an XML node
|
|
-------------------------------------------------*/
|
|
|
|
data_node::~data_node()
|
|
{
|
|
/* free the children */
|
|
for (data_node *nchild = nullptr; m_first_child; m_first_child = nchild)
|
|
{
|
|
/* note the next node and free this node */
|
|
nchild = m_first_child->get_next_sibling();
|
|
delete m_first_child;
|
|
}
|
|
}
|
|
|
|
|
|
void data_node::set_value(char const *value)
|
|
{
|
|
m_value.assign(value ? value : "");
|
|
}
|
|
|
|
|
|
void data_node::append_value(char const *value, int length)
|
|
{
|
|
m_value.append(value, length);
|
|
}
|
|
|
|
|
|
void data_node::trim_whitespace()
|
|
{
|
|
/* first strip leading spaces */
|
|
std::string::iterator start = m_value.begin();
|
|
while ((m_value.end() != start) && std::isspace(uint8_t(*start)))
|
|
++start;
|
|
m_value.replace(m_value.begin(), start, 0U, '\0');
|
|
|
|
/* then strip trailing spaces */
|
|
std::string::iterator end = m_value.end();
|
|
while ((m_value.begin() != end) && std::isspace(uint8_t(*std::prev(end))))
|
|
--end;
|
|
m_value.replace(end, m_value.end(), 0U, '\0');
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
data_node::count_children - count the
|
|
number of child nodes
|
|
-------------------------------------------------*/
|
|
|
|
int data_node::count_children() const
|
|
{
|
|
int count = 0;
|
|
|
|
/* loop over children and count */
|
|
for (data_node const *node = get_first_child(); node; node = node->get_next_sibling())
|
|
count++;
|
|
return count;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
data_node::get_child - find the first
|
|
child of the specified node with the specified
|
|
tag
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::get_child(const char *name)
|
|
{
|
|
return m_first_child ? m_first_child->get_sibling(name) : nullptr;
|
|
}
|
|
|
|
data_node const *data_node::get_child(const char *name) const
|
|
{
|
|
return m_first_child ? m_first_child->get_sibling(name) : nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
find_first_matching_child - find the first
|
|
child of the specified node with the
|
|
specified tag or attribute/value pair
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::find_first_matching_child(const char *name, const char *attribute, const char *matchval)
|
|
{
|
|
return m_first_child ? m_first_child->find_matching_sibling(name, attribute, matchval) : nullptr;
|
|
}
|
|
|
|
data_node const *data_node::find_first_matching_child(const char *name, const char *attribute, const char *matchval) const
|
|
{
|
|
return m_first_child ? m_first_child->find_matching_sibling(name, attribute, matchval) : nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
data_node::get_next_sibling - find the
|
|
next sibling of the specified node with the
|
|
specified tag
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::get_next_sibling(const char *name)
|
|
{
|
|
return m_next ? m_next->get_sibling(name) : nullptr;
|
|
}
|
|
|
|
data_node const *data_node::get_next_sibling(const char *name) const
|
|
{
|
|
return m_next ? m_next->get_sibling(name) : nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
find_next_matching_sibling - find the next
|
|
sibling of the specified node with the
|
|
specified tag or attribute/value pair
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::find_next_matching_sibling(const char *name, const char *attribute, const char *matchval)
|
|
{
|
|
return m_next ? m_next->find_matching_sibling(name, attribute, matchval) : nullptr;
|
|
}
|
|
|
|
data_node const *data_node::find_next_matching_sibling(const char *name, const char *attribute, const char *matchval) const
|
|
{
|
|
return m_next ? m_next->find_matching_sibling(name, attribute, matchval) : nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
add_child - add a new child node to the
|
|
given node
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::add_child(const char *name, const char *value)
|
|
{
|
|
/* new element: create a new node */
|
|
data_node *node;
|
|
try { node = new data_node(this, name, value); }
|
|
catch (...) { return nullptr; }
|
|
|
|
if (!node->get_name() || (!node->get_value() && value))
|
|
{
|
|
delete node;
|
|
return nullptr;
|
|
}
|
|
|
|
/* add us to the end of the list of siblings */
|
|
data_node **pnode;
|
|
for (pnode = &m_first_child; *pnode; pnode = &(*pnode)->m_next) { }
|
|
*pnode = node;
|
|
|
|
return node;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_or_add_child - find a child node of
|
|
the specified type; if not found, add one
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::get_or_add_child(const char *name, const char *value)
|
|
{
|
|
/* find the child first */
|
|
data_node *const child = m_first_child->get_sibling(name);
|
|
if (child)
|
|
return child;
|
|
|
|
/* if not found, do a standard add child */
|
|
return add_child(name, value);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
delete_node - delete a node and its
|
|
children
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::delete_node()
|
|
{
|
|
/* first unhook us from the list of children of our parent */
|
|
if (m_parent)
|
|
{
|
|
for (data_node **pnode = &m_parent->m_first_child; *pnode; pnode = &(*pnode)->m_next)
|
|
{
|
|
if (*pnode == this)
|
|
{
|
|
*pnode = this->m_next;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* now free ourselves and our children */
|
|
delete this;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_next_sibling - find the next sibling of
|
|
the specified node with the specified tag
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::get_sibling(const char *name)
|
|
{
|
|
/* loop over siblings and find a matching name */
|
|
for (data_node *node = this; node; node = node->get_next_sibling())
|
|
if (strcmp(node->get_name(), name) == 0)
|
|
return node;
|
|
return nullptr;
|
|
}
|
|
|
|
data_node const *data_node::get_sibling(const char *name) const
|
|
{
|
|
/* loop over siblings and find a matching name */
|
|
for (data_node const *node = this; node; node = node->get_next_sibling())
|
|
if (strcmp(node->get_name(), name) == 0)
|
|
return node;
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
find_matching_sibling - find the next
|
|
sibling of the specified node with the
|
|
specified tag or attribute/value pair
|
|
-------------------------------------------------*/
|
|
|
|
data_node *data_node::find_matching_sibling(const char *name, const char *attribute, const char *matchval)
|
|
{
|
|
/* loop over siblings and find a matching attribute */
|
|
for (data_node *node = this; node; node = node->get_next_sibling())
|
|
{
|
|
/* can pass nullptr as a wildcard for the node name */
|
|
if (!name || !strcmp(name, node->get_name()))
|
|
{
|
|
/* find a matching attribute */
|
|
attribute_node const *const attr = node->get_attribute(attribute);
|
|
if (attr && !strcmp(attr->value.c_str(), matchval))
|
|
return node;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
data_node const *data_node::find_matching_sibling(const char *name, const char *attribute, const char *matchval) const
|
|
{
|
|
/* loop over siblings and find a matching attribute */
|
|
for (data_node const *node = this; node; node = node->get_next_sibling())
|
|
{
|
|
/* can pass nullptr as a wildcard for the node name */
|
|
if (!name || !strcmp(name, node->get_name()))
|
|
{
|
|
/* find a matching attribute */
|
|
attribute_node const *const attr = node->get_attribute(attribute);
|
|
if (attr && !strcmp(attr->value.c_str(), matchval))
|
|
return node;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
XML ATTRIBUTE MANAGEMENT
|
|
***************************************************************************/
|
|
|
|
bool data_node::has_attribute(const char *attribute) const
|
|
{
|
|
return get_attribute(attribute) != nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_attribute - get the value of the
|
|
specified attribute, or nullptr if not found
|
|
-------------------------------------------------*/
|
|
|
|
data_node::attribute_node *data_node::get_attribute(const char *attribute)
|
|
{
|
|
/* loop over attributes and find a match */
|
|
for (attribute_node &anode : m_attributes)
|
|
if (strcmp(anode.name.c_str(), attribute) == 0)
|
|
return &anode;
|
|
return nullptr;
|
|
}
|
|
|
|
data_node::attribute_node const *data_node::get_attribute(const char *attribute) const
|
|
{
|
|
/* loop over attributes and find a match */
|
|
for (attribute_node const &anode : m_attributes)
|
|
if (strcmp(anode.name.c_str(), attribute) == 0)
|
|
return &anode;
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_attribute_string - get the string
|
|
value of the specified attribute; if not
|
|
found, return = the provided default
|
|
-------------------------------------------------*/
|
|
|
|
const char *data_node::get_attribute_string(const char *attribute, const char *defvalue) const
|
|
{
|
|
attribute_node const *attr = get_attribute(attribute);
|
|
return attr ? attr->value.c_str() : defvalue;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_attribute_int - get the integer
|
|
value of the specified attribute; if not
|
|
found, return = the provided default
|
|
-------------------------------------------------*/
|
|
|
|
int data_node::get_attribute_int(const char *attribute, int defvalue) const
|
|
{
|
|
char const *const string = get_attribute_string(attribute, nullptr);
|
|
int value;
|
|
unsigned int uvalue;
|
|
|
|
if (string == nullptr)
|
|
return defvalue;
|
|
if (string[0] == '$')
|
|
return (sscanf(&string[1], "%X", &uvalue) == 1) ? uvalue : defvalue;
|
|
if (string[0] == '0' && string[1] == 'x')
|
|
return (sscanf(&string[2], "%X", &uvalue) == 1) ? uvalue : defvalue;
|
|
if (string[0] == '#')
|
|
return (sscanf(&string[1], "%d", &value) == 1) ? value : defvalue;
|
|
return (sscanf(&string[0], "%d", &value) == 1) ? value : defvalue;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_attribute_int_format - return the
|
|
format of the given integer attribute
|
|
-------------------------------------------------*/
|
|
|
|
data_node::int_format data_node::get_attribute_int_format(const char *attribute) const
|
|
{
|
|
char const *const string = get_attribute_string(attribute, nullptr);
|
|
|
|
if (!string)
|
|
return int_format::DECIMAL;
|
|
else if (string[0] == '$')
|
|
return int_format::HEX_DOLLAR;
|
|
else if (string[0] == '0' && string[1] == 'x')
|
|
return int_format::HEX_C;
|
|
if (string[0] == '#')
|
|
return int_format::DECIMAL_HASH;
|
|
else
|
|
return int_format::DECIMAL;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
get_attribute_float - get the float
|
|
value of the specified attribute; if not
|
|
found, return = the provided default
|
|
-------------------------------------------------*/
|
|
|
|
float data_node::get_attribute_float(const char *attribute, float defvalue) const
|
|
{
|
|
char const *const string = get_attribute_string(attribute, nullptr);
|
|
float value;
|
|
|
|
if (string == nullptr || sscanf(string, "%f", &value) != 1)
|
|
return defvalue;
|
|
return value;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
set_attribute - set a new attribute and
|
|
string value on the node
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::set_attribute(const char *name, const char *value)
|
|
{
|
|
attribute_node *anode;
|
|
|
|
/* first find an existing one to replace */
|
|
anode = get_attribute(name);
|
|
|
|
if (anode != nullptr)
|
|
{
|
|
/* if we found it, free the old value and replace it */
|
|
anode->value = value;
|
|
}
|
|
else
|
|
{
|
|
/* otherwise, create a new node */
|
|
add_attribute(name, value);
|
|
}
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
set_attribute_int - set a new attribute and
|
|
integer value on the node
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::set_attribute_int(const char *name, int value)
|
|
{
|
|
char buffer[100];
|
|
sprintf(buffer, "%d", value);
|
|
set_attribute(name, buffer);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
set_attribute_int - set a new attribute and
|
|
float value on the node
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::set_attribute_float(const char *name, float value)
|
|
{
|
|
char buffer[100];
|
|
sprintf(buffer, "%f", (double) value);
|
|
set_attribute(name, buffer);
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
MISCELLANEOUS INTERFACES
|
|
***************************************************************************/
|
|
|
|
/*-------------------------------------------------
|
|
normalize_string - normalize a string
|
|
to ensure it doesn't contain embedded tags
|
|
-------------------------------------------------*/
|
|
|
|
const char *normalize_string(const char *string)
|
|
{
|
|
static char buffer[1024];
|
|
char *d = &buffer[0];
|
|
|
|
if (string != nullptr)
|
|
{
|
|
while (*string)
|
|
{
|
|
switch (*string)
|
|
{
|
|
case '\"' : d += sprintf(d, """); break;
|
|
case '&' : d += sprintf(d, "&"); break;
|
|
case '<' : d += sprintf(d, "<"); break;
|
|
case '>' : d += sprintf(d, ">"); break;
|
|
default:
|
|
*d++ = *string;
|
|
}
|
|
++string;
|
|
}
|
|
}
|
|
*d++ = 0;
|
|
return buffer;
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
EXPAT INTERFACES
|
|
***************************************************************************/
|
|
|
|
/*-------------------------------------------------
|
|
expat_malloc/expat_realloc/expat_free -
|
|
wrappers for memory allocation functions so
|
|
that they pass through out memory tracking
|
|
systems
|
|
-------------------------------------------------*/
|
|
|
|
static void *expat_malloc(size_t size)
|
|
{
|
|
uint32_t *result = (uint32_t *)malloc(size + 4 * sizeof(uint32_t));
|
|
*result = size;
|
|
return &result[4];
|
|
}
|
|
|
|
static void expat_free(void *ptr)
|
|
{
|
|
if (ptr != nullptr)
|
|
free(&((uint32_t *)ptr)[-4]);
|
|
}
|
|
|
|
static void *expat_realloc(void *ptr, size_t size)
|
|
{
|
|
void *newptr = expat_malloc(size);
|
|
if (newptr == nullptr)
|
|
return nullptr;
|
|
if (ptr != nullptr)
|
|
{
|
|
uint32_t oldsize = ((uint32_t *)ptr)[-4];
|
|
memcpy(newptr, ptr, oldsize);
|
|
expat_free(ptr);
|
|
}
|
|
return newptr;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
expat_setup_parser - set up expat for parsing
|
|
-------------------------------------------------*/
|
|
|
|
static bool expat_setup_parser(parse_info &info, parse_options const *opts)
|
|
{
|
|
XML_Memory_Handling_Suite memcallbacks;
|
|
|
|
/* setup info structure */
|
|
memset(&info, 0, sizeof(info));
|
|
if (opts != nullptr)
|
|
{
|
|
info.flags = opts->flags;
|
|
if (opts->error != nullptr)
|
|
{
|
|
opts->error->error_message = nullptr;
|
|
opts->error->error_line = 0;
|
|
opts->error->error_column = 0;
|
|
}
|
|
}
|
|
|
|
/* create a root node */
|
|
info.rootnode = data_node::file_create();
|
|
if (info.rootnode == nullptr)
|
|
return false;
|
|
info.curnode = info.rootnode;
|
|
|
|
/* create the XML parser */
|
|
memcallbacks.malloc_fcn = expat_malloc;
|
|
memcallbacks.realloc_fcn = expat_realloc;
|
|
memcallbacks.free_fcn = expat_free;
|
|
info.parser = XML_ParserCreate_MM(nullptr, &memcallbacks, nullptr);
|
|
if (info.parser == nullptr)
|
|
{
|
|
info.rootnode->file_free();
|
|
return false;
|
|
}
|
|
|
|
/* configure the parser */
|
|
XML_SetElementHandler(info.parser, expat_element_start, expat_element_end);
|
|
XML_SetCharacterDataHandler(info.parser, expat_data);
|
|
XML_SetUserData(info.parser, &info);
|
|
|
|
/* optional parser initialization step */
|
|
if (opts != nullptr && opts->init_parser != nullptr)
|
|
(*opts->init_parser)(info.parser);
|
|
return true;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
expat_element_start - expat callback for a new
|
|
element
|
|
-------------------------------------------------*/
|
|
|
|
static void expat_element_start(void *data, const XML_Char *name, const XML_Char **attributes)
|
|
{
|
|
parse_info *info = (parse_info *) data;
|
|
data_node **curnode = &info->curnode;
|
|
data_node *newnode;
|
|
int attr;
|
|
|
|
/* add a new child node to the current node */
|
|
newnode = (*curnode)->add_child(name, nullptr);
|
|
if (newnode == nullptr)
|
|
return;
|
|
|
|
/* remember the line number */
|
|
newnode->line = XML_GetCurrentLineNumber(info->parser);
|
|
|
|
/* add all the attributes as well */
|
|
for (attr = 0; attributes[attr]; attr += 2)
|
|
newnode->add_attribute(attributes[attr+0], attributes[attr+1]);
|
|
|
|
/* set us up as the current node */
|
|
*curnode = newnode;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
expat_data - expat callback for an additional
|
|
element data
|
|
-------------------------------------------------*/
|
|
|
|
static void expat_data(void *data, const XML_Char *s, int len)
|
|
{
|
|
parse_info *info = (parse_info *) data;
|
|
data_node **curnode = &info->curnode;
|
|
(*curnode)->append_value(s, len);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------
|
|
expat_element_end - expat callback for the end
|
|
of an element
|
|
-------------------------------------------------*/
|
|
|
|
static void expat_element_end(void *data, const XML_Char *name)
|
|
{
|
|
parse_info *info = (parse_info *) data;
|
|
data_node **curnode = &info->curnode;
|
|
|
|
/* strip leading/trailing spaces from the value data */
|
|
if (!(info->flags & PARSE_FLAG_WHITESPACE_SIGNIFICANT))
|
|
(*curnode)->trim_whitespace();
|
|
|
|
/* back us up a node */
|
|
*curnode = (*curnode)->get_parent();
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
NODE/ATTRIBUTE ADDITIONS
|
|
***************************************************************************/
|
|
|
|
/*-------------------------------------------------
|
|
add_attribute - add a new attribute to the
|
|
given node
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::add_attribute(const char *name, const char *value)
|
|
{
|
|
try
|
|
{
|
|
attribute_node &anode = *m_attributes.emplace(m_attributes.end(), name, value);
|
|
std::transform(anode.name.begin(), anode.name.end(), anode.name.begin(), [] (char ch) { return std::tolower(uint8_t(ch)); });
|
|
}
|
|
catch (...)
|
|
{
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************************
|
|
RECURSIVE TREE OPERATIONS
|
|
***************************************************************************/
|
|
|
|
/*-------------------------------------------------
|
|
write_node_recursive - recursively write
|
|
an XML node and its children to a file
|
|
-------------------------------------------------*/
|
|
|
|
void data_node::write_recursive(int indent, util::core_file &file) const
|
|
{
|
|
/* output this tag */
|
|
file.printf("%*s<%s", indent, "", get_name());
|
|
|
|
/* output any attributes */
|
|
for (attribute_node const &anode : m_attributes)
|
|
file.printf(" %s=\"%s\"", anode.name, anode.value);
|
|
|
|
if (!get_first_child() && !get_value())
|
|
{
|
|
/* if there are no children and no value, end the tag here */
|
|
file.printf(" />\n");
|
|
}
|
|
else
|
|
{
|
|
/* otherwise, close this tag and output more stuff */
|
|
file.printf(">\n");
|
|
|
|
/* if there is a value, output that here */
|
|
if (get_value())
|
|
file.printf("%*s%s\n", indent + 4, "", get_value());
|
|
|
|
/* loop over children and output them as well */
|
|
if (get_first_child())
|
|
{
|
|
for (data_node const *child = this->get_first_child(); child; child = child->get_next_sibling())
|
|
child->write_recursive(indent + 4, file);
|
|
}
|
|
|
|
/* write a closing tag */
|
|
file.printf("%*s</%s>\n", indent, "", get_name());
|
|
}
|
|
}
|
|
|
|
|
|
} } // namespace util::xml
|