token * lex_next(lexer * lex) {
switch(lex->state) {
case LEX_DEF:
_lex_adv(lex);
if(EOF == lex->current_char) { return lex_next(_lex_set_state(lex, LEX_DONE)); }
else if(_is_int(lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_IN_INT)); }
else if(_is_space(lex->current_char)) { return lex_next(lex); }
else if(_is_str_end(lex->current_char)) { return lex_next(_lex_adv(_lex_set_state(lex, LEX_IN_STR))); }
else if(_is_id_start(lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_IN_ID)); }
else if(_is_ctrl_char(lex->current_char)) { return _token_ctrl_char(lex->current_char); }
else { return lex_next(_lex_set_state(lex, LEX_ERR)); }
case LEX_IN_INT:
if(_is_int(lex->current_char)) {
if(0 == str_add(lex->tok_buf, lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_ERR)); }
return lex_next(_lex_adv(lex));
}
return _tok_new(lex, TOK_INT, LEX_DEF);
case LEX_IN_ID:
if(_is_id(lex->current_char)) {
if(0 == str_add(lex->tok_buf, lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_ERR)); }
return lex_next(_lex_adv(lex));
}
if(_is_keyword(lex->tok_buf)) { return _tok_new(lex, TOK_KEY, LEX_DEF); }
return _tok_new(lex, TOK_ID, LEX_DEF);
case LEX_IN_STR:
if(!_is_str_end(lex->current_char)) {
if(_is_escape(lex->current_char)) { return lex_next(_lex_adv(_lex_set_state(lex, LEX_IN_ESC))); }
if(0 == str_add(lex->tok_buf, lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_ERR)); }
return lex_next(_lex_adv(lex));
}
return _tok_new(lex, TOK_STR, LEX_DEF);
case LEX_IN_ESC:
if(_is_escapable(lex->current_char)) {
_lex_set_char(lex, _make_escape(lex->current_char));
if(0 == str_add(lex->tok_buf, lex->current_char)) { return lex_next(_lex_set_state(lex, LEX_ERR)); }
return lex_next(_lex_adv(_lex_set_state(lex, LEX_IN_STR)));
}
return lex_next(_lex_set_state(lex, LEX_ERR));
case LEX_ERR: return _tok_new(lex, TOK_ERR, LEX_DEF);
case LEX_DONE:
default: return _tok_new(lex, TOK_EOF, LEX_DONE);
}
}
static void
_text_cb (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
XMLNode *p = (XMLNode *)user_data;
if (_is_space (text, text_len)) {
return;
}
if (p->sub_nodes || p->text) {
g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT, " ");
return;
}
p->text = g_strndup (text, text_len);
}
/**
* fm_xml_file_parse_data
* @file: the parser container
* @text: data to parse
* @size: size of @text
* @error: (allow-none) (out): location to save error
* @user_data: data to pass to handlers
*
* Parses next chunk of @text data. Parsing stops at end of data or at any
* error. In latter case @error will be set appropriately.
*
* See also: fm_xml_file_finish_parse().
*
* Returns: %FALSE if parsing failed.
*
* Since: 1.2.0
*/
gboolean fm_xml_file_parse_data(FmXmlFile *file, const char *text,
gsize size, GError **error, gpointer user_data)
{
gsize ptr, len;
char *dst, *end, *tag, *name, *value;
GString *buff;
FmXmlFileItem *item;
gboolean closing, selfdo;
FmXmlFileTag i;
char **attrib_names, **attrib_values;
guint attribs;
char quote;
g_return_val_if_fail(file != NULL && FM_IS_XML_FILE(file), FALSE);
_restart:
if (size == 0)
return TRUE;
/* if file->data has '<' as first char then we stopped at tag */
if (file->data && file->data->len && file->data->str[0] == '<')
{
for (ptr = 0; ptr < size; ptr++)
if (text[ptr] == '>')
break;
if (ptr == size) /* still no end of that tag */
{
g_string_append_len(file->data, text, size);
return TRUE;
}
/* we got a complete tag, nice, let parse it */
g_string_append_len(file->data, text, ptr);
ptr++;
text += ptr;
size -= ptr;
/* check for CDATA first */
if (file->data->len >= 11 /* <![CDATA[]] */ &&
strncmp(file->data->str, "<![CDATA[", 9) == 0)
{
end = file->data->str + file->data->len;
if (end[-2] != ']' || end[-1] != ']') /* find end of CDATA */
{
g_string_append_c(file->data, '>');
goto _restart;
}
if (file->current_item == NULL) /* CDATA at top level! */
g_warning("FmXmlFile: line %u: junk CDATA in XML file ignored",
file->line);
else
{
item = fm_xml_file_item_new(FM_XML_FILE_TEXT);
item->text = item->comment = g_strndup(&file->data->str[9],
file->data->len - 11);
fm_xml_file_item_append_child(file->current_item, item);
}
_update_file_ptr(file, 1);
g_string_truncate(file->data, 0);
goto _restart;
}
/* check for comment */
if (file->data->len >= 7 /* <!-- -- */ &&
strncmp(file->data->str, "<!--", 4) == 0)
{
end = file->data->str + file->data->len;
if (end[-2] != '-' || end[-1] != '-') /* find end of comment */
{
g_string_append_c(file->data, '>');
goto _restart;
}
g_free(file->comment_pre);
/* FIXME: not ignore duplicate comments */
if (_is_space(end[-3]))
file->comment_pre = g_strndup(&file->data->str[5],
file->data->len - 8);
else /* FIXME: check: XML spec says it should be not '-' */
file->comment_pre = g_strndup(&file->data->str[5],
file->data->len - 7);
_update_file_ptr(file, 1);
g_string_truncate(file->data, 0);
goto _restart;
}
/* check for DTD - it may be only at top level */
if (file->current_item == NULL && file->data->len >= 10 &&
strncmp(file->data->str, "<!DOCTYPE", 9) == 0 &&
_is_space(file->data->str[9]))
{
/* FIXME: can DTD contain any tags? count '<' and '>' pairs */
if (file->tags[0].name) /* duplicate DTD! */
g_warning("FmXmlFile: line %u: duplicate DTD, ignored",
file->line);
else
file->tags[0].name = g_strndup(&file->data->str[10],
file->data->len - 10);
_update_file_ptr(file, 1);
g_string_truncate(file->data, 0);
goto _restart;
}
/* support directives such as <?xml ..... ?> */
if (file->data->len >= 4 /* <?x? */ &&
file->data->str[1] == '?' &&
file->data->str[file->data->len-1] == '?')
{
item = fm_xml_file_item_new(FM_XML_FILE_TEXT);
item->comment = g_strndup(&file->data->str[2], file->data->len - 3);
if (file->current_item != NULL)
fm_xml_file_item_append_child(file->current_item, item);
else
{
item->file = file;
item->parent_list = &file->items;
file->items = g_list_append(file->items, item);
}
_update_file_ptr(file, 1);
g_string_truncate(file->data, 0);
goto _restart;
}
closing = (file->data->str[1] == '/');
end = file->data->str + file->data->len;
selfdo = (!closing && end[-1] == '/');
if (selfdo)
end--;
tag = closing ? &file->data->str[2] : &file->data->str[1];
for (dst = tag; dst < end; dst++)
if (_is_space(*dst))
break;
_update_file_ptr_part(file, file->data->str, dst + 1);
*dst = '\0'; /* terminate the tag */
if (closing)
{
if (dst != end) /* we got a space char in closing tag */
{
g_set_error_literal(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
_("Space isn't allowed in the close tag"));
return FALSE;
}
/* g_debug("XML parser: found closing tag '%s' for %p at %d:%d", tag,
file->current_item, file->line, file->pos); */
item = file->current_item;
if (item == NULL) /* no tag to close */
{
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
_("Element '%s' was closed but no element was opened"),
tag);
return FALSE;
}
else
{
char *tagname;
if (item->tag == FM_XML_FILE_TAG_NOT_HANDLED)
tagname = item->tag_name;
else
tagname = file->tags[item->tag].name;
if (strcmp(tag, tagname)) /* closing tag doesn't match */
{
/* FIXME: validate tag so be more verbose on error */
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
_("Element '%s' was closed but the currently "
"open element is '%s'"), tag, tagname);
return FALSE;
}
file->current_item = item->parent;
_close_the_tag:
/* g_debug("XML parser: close the tag '%s'", tag); */
g_string_truncate(file->data, 0);
if (item->tag != FM_XML_FILE_TAG_NOT_HANDLED)
{
if (!file->tags[item->tag].handler(item, item->children,
item->attribute_names,
item->attribute_values,
item->attribute_names ? g_strv_length(item->attribute_names) : 0,
file->line,
file->pos,
error, user_data))
return FALSE;
}
file->pos++; /* '>' */
goto _restart;
}
}
else /* opening tag */
{
/* g_debug("XML parser: found opening tag '%s'", tag); */
/* parse and check tag name */
for (i = 1; i < file->n_tags; i++)
if (strcmp(file->tags[i].name, tag) == 0)
break;
if (i == file->n_tags)
/* FIXME: do name validation */
i = FM_XML_FILE_TAG_NOT_HANDLED;
/* parse and check attributes */
attribs = 0;
attrib_names = attrib_values = NULL;
while (dst < end)
{
name = &dst[1]; /* skip this space */
while (name < end && _is_space(*name))
name++;
value = name;
while (value < end && !_is_space(*value) && *value != '=')
value++;
len = value - name;
_update_file_ptr_part(file, dst, value);
/* FIXME: skip spaces before =? */
if (value + 3 <= end && *value == '=') /* minimum is ="" */
{
value++;
file->pos++; /* '=' */
/* FIXME: skip spaces after =? */
quote = *value++;
if (quote != '\'' && quote != '"')
{
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
_("Invalid char '%c' at start of attribute value"),
quote);
goto _attr_error;
}
file->pos++; /* quote char */
for (ptr = 0; &value[ptr] < end; ptr++)
if (value[ptr] == quote)
break;
if (&value[ptr] == end)
{
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
_("Invalid char '%c' at end of attribute value,"
" expected '%c'"), value[ptr-1], quote);
goto _attr_error;
}
buff = g_string_new_len(value, ptr);
if (!unescape_gstring_inplace(buff, &file->line,
&file->pos, TRUE, error))
{
g_string_free(buff, TRUE);
_attr_error:
for (i = 0; i < attribs; i++)
{
g_free(attrib_names[i]);
g_free(attrib_values[i]);
}
g_free(attrib_names);
g_free(attrib_values);
return FALSE;
}
dst = &value[ptr+1];
value = g_string_free(buff, FALSE);
file->pos++; /* end quote char */
}
else
{
dst = value;
value = NULL;
/* FIXME: isn't it error? */
}
attrib_names = g_renew(char *, attrib_names, attribs + 2);
attrib_values = g_renew(char *, attrib_values, attribs + 2);
attrib_names[attribs] = g_strndup(name, len);
attrib_values[attribs] = value;
attribs++;
}
if (attribs > 0)
{
attrib_names[attribs] = NULL;
attrib_values[attribs] = NULL;
}
/* create new item */
item = fm_xml_file_item_new(i);
item->attribute_names = attrib_names;
item->attribute_values = attrib_values;
if (i == FM_XML_FILE_TAG_NOT_HANDLED)
item->tag_name = g_strdup(tag);
/* insert new item into the container */
item->comment = file->comment_pre;
file->comment_pre = NULL;
if (file->current_item)
fm_xml_file_item_append_child(file->current_item, item);
else
{
item->file = file;
item->parent_list = &file->items;
file->items = g_list_append(file->items, item);
}
file->pos++; /* '>' or '/' */
if (selfdo) /* simple self-closing tag */
goto _close_the_tag;
file->current_item = item;
g_string_truncate(file->data, 0);
goto _restart;
}
}
/* otherwise we stopped at some data somewhere */
else
{
if (!file->data || file->data->len == 0) while (size > 0)