407 lines
11 KiB
Text
407 lines
11 KiB
Text
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2018 Olof Hagsand and Benny Holmgren
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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* XML parser
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* @see https://www.w3.org/TR/2008/REC-xml-20081126
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* https://www.w3.org/TR/2009/REC-xml-names-20091208
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*/
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%union {
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char *string;
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}
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%start topxml
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%token <string> NAME CHARDATA
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%token VER ENC
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%token BSLASH ESLASH
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%token BTEXT ETEXT
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%token BCOMMENT ECOMMENT
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%type <string> attvalue
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%lex-param {void *_ya} /* Add this argument to parse() and lex() function */
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%parse-param {void *_ya}
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%{
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/* typecast macro */
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#define _YA ((struct xml_parse_yacc_arg *)_ya)
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clicon */
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#include "clixon_err.h"
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#include "clixon_log.h"
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#include "clixon_queue.h"
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#include "clixon_hash.h"
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#include "clixon_handle.h"
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#include "clixon_yang.h"
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#include "clixon_xml.h"
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#include "clixon_xml_sort.h"
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#include "clixon_xml_parse.h"
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void
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clixon_xml_parseerror(void *_ya, char *s)
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{
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clicon_err(OE_XML, 0, "xml_parse: line %d: %s: at or before: %s",
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_YA->ya_linenum, s, clixon_xml_parsetext);
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return;
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}
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/*
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* Note that we dont handle escaped characters correctly
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* there may also be some leakage here on NULL return
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*/
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static int
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xml_parse_content(struct xml_parse_yacc_arg *ya,
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char *str)
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{
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cxobj *xn = ya->ya_xelement;
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cxobj *xp = ya->ya_xparent;
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int retval = -1;
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ya->ya_xelement = NULL; /* init */
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if (xn == NULL){
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if ((xn = xml_new("body", xp, NULL)) == NULL)
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goto done;
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xml_type_set(xn, CX_BODY);
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}
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if (xml_value_append(xn, str)==NULL)
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goto done;
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ya->ya_xelement = xn;
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retval = 0;
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done:
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return retval;
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}
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static int
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xml_parse_version(struct xml_parse_yacc_arg *ya,
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char *ver)
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{
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if(strcmp(ver, "1.0")){
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clicon_err(OE_XML, errno, "Wrong XML version %s expected 1.0", ver);
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free(ver);
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return -1;
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}
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free(ver);
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return 0;
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}
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/*! Parse Qualified name --> Unprefixed name
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* @param[in] ya XML parser yacc handler struct
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* @param[in] prefix Prefix, namespace, or NULL
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* @param[in] localpart Name
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*/
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static int
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xml_parse_unprefixed_name(struct xml_parse_yacc_arg *ya,
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char *name)
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{
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int retval = -1;
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cxobj *x;
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yang_stmt *y = NULL; /* yang node */
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cxobj *xp; /* xml parent */
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xp = ya->ya_xparent;
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if (xml_child_spec(name, xp, ya->ya_yspec, &y) < 0)
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goto done;
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if ((x = xml_new(name, xp, y)) == NULL)
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goto done;
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ya->ya_xelement = x;
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retval = 0;
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done:
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free(name);
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return retval;
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}
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/*! Parse Qualified name -> PrefixedName
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* @param[in] ya XML parser yacc handler struct
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* @param[in] prefix Prefix, namespace, or NULL
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* @param[in] localpart Name
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*/
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static int
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xml_parse_prefixed_name(struct xml_parse_yacc_arg *ya,
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char *prefix,
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char *name)
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{
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int retval = -1;
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cxobj *x;
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yang_stmt *y = NULL; /* yang node */
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cxobj *xp; /* xml parent */
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xp = ya->ya_xparent;
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if (xml_child_spec(name, xp, ya->ya_yspec, &y) < 0)
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goto done;
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if ((x = xml_new(name, xp, y)) == NULL)
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goto done;
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if (xml_namespace_set(x, prefix) < 0)
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goto done;
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ya->ya_xelement = x;
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retval = 0;
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done:
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if (prefix)
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free(prefix);
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free(name);
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return retval;
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}
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static int
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xml_parse_endslash_pre(struct xml_parse_yacc_arg *ya)
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{
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ya->ya_xparent = ya->ya_xelement;
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ya->ya_xelement = NULL;
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return 0;
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}
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static int
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xml_parse_endslash_mid(struct xml_parse_yacc_arg *ya)
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{
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if (ya->ya_xelement != NULL)
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ya->ya_xelement = xml_parent(ya->ya_xelement);
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else
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ya->ya_xelement = ya->ya_xparent;
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ya->ya_xparent = xml_parent(ya->ya_xelement);
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return 0;
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}
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static int
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xml_parse_endslash_post(struct xml_parse_yacc_arg *ya)
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{
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ya->ya_xelement = NULL;
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return 0;
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}
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/*! Called at </name> */
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static int
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xml_parse_bslash1(struct xml_parse_yacc_arg *ya,
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char *name)
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{
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int retval = -1;
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cxobj *x = ya->ya_xelement;
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cxobj *xc;
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if (strcmp(xml_name(x), name)){
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clicon_err(OE_XML, 0, "XML parse sanity check failed: %s vs %s",
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xml_name(x), name);
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goto done;
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}
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if (xml_namespace(x)!=NULL){
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clicon_err(OE_XML, 0, "XML parse sanity check failed: %s:%s vs %s",
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xml_namespace(x), xml_name(x), name);
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goto done;
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}
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/* Strip pretty-print. Ad-hoc algorithm
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* It ok with x:[body], but not with x:[ex,body]
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* It is also ok with x:[attr,body]
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* So the rule is: if there is at least on element, then remove all bodies?
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*/
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if (ya->ya_skipspace){
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xc = NULL;
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while ((xc = xml_child_each(x, xc, CX_ELMNT)) != NULL)
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break;
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if (xc != NULL){ /* at least one element */
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xc = NULL;
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while ((xc = xml_child_each(x, xc, CX_BODY)) != NULL) {
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xml_purge(xc);
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xc = NULL; /* reset iterator */
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}
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}
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}
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retval = 0;
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done:
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free(name);
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return retval;
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}
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/*! Called at </namespace:name> */
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static int
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xml_parse_bslash2(struct xml_parse_yacc_arg *ya,
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char *namespace,
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char *name)
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{
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int retval = -1;
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cxobj *x = ya->ya_xelement;
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cxobj *xc;
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if (strcmp(xml_name(x), name)){
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clicon_err(OE_XML, 0, "Sanity check failed: %s:%s vs %s:%s",
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xml_namespace(x),
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xml_name(x),
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namespace,
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name);
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goto done;
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}
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if (xml_namespace(x)==NULL ||
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strcmp(xml_namespace(x), namespace)){
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clicon_err(OE_XML, 0, "Sanity check failed: %s:%s vs %s:%s",
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xml_namespace(x),
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xml_name(x),
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namespace,
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name);
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goto done;
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}
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/* Strip pretty-print. Ad-hoc algorithm
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* It ok with x:[body], but not with x:[ex,body]
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* It is also ok with x:[attr,body]
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* So the rule is: if there is at least on element, then remove all bodies?
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*/
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if (ya->ya_skipspace){
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xc = NULL;
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while ((xc = xml_child_each(x, xc, CX_ELMNT)) != NULL)
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break;
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if (xc != NULL){ /* at least one element */
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xc = NULL;
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while ((xc = xml_child_each(x, xc, CX_BODY)) != NULL) {
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xml_value_set(xc, ""); /* XXX remove */
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}
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}
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}
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retval = 0;
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done:
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free(name);
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free(namespace);
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return retval;
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}
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static int
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xml_parse_attr(struct xml_parse_yacc_arg *ya,
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char *prefix,
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char *name,
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char *attval)
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{
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int retval = -1;
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cxobj *xa;
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if ((xa = xml_new(name, ya->ya_xelement, NULL)) == NULL)
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goto done;
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xml_type_set(xa, CX_ATTR);
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if (prefix && xml_namespace_set(xa, prefix) < 0)
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goto done;
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if (xml_value_set(xa, attval) < 0)
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goto done;
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retval = 0;
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done:
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free(name);
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if (prefix)
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free(prefix);
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free(attval);
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return retval;
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}
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%}
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%%
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topxml : list
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{ clicon_debug(3, "topxml->list ACCEPT");
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YYACCEPT; }
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| dcl list
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{ clicon_debug(3, "topxml->dcl list ACCEPT");
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YYACCEPT; }
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;
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dcl : BTEXT info encode ETEXT { clicon_debug(3, "dcl->info encode"); }
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;
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info : VER '=' '\"' CHARDATA '\"'
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{ if (xml_parse_version(_YA, $4) <0) YYABORT; }
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| VER '=' '\'' CHARDATA '\''
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{ if (xml_parse_version(_YA, $4) <0) YYABORT; }
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;
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encode : ENC '=' '\"' CHARDATA '\"' {free($4);}
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| ENC '=' '\'' CHARDATA '\'' {free($4);}
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;
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element : '<' qname attrs element1
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{ clicon_debug(3, "element -> < qname attrs element1"); }
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;
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qname : NAME { if (xml_parse_unprefixed_name(_YA, $1) < 0) YYABORT;
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clicon_debug(3, "qname -> NAME %s", $1);}
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| NAME ':' NAME { if (xml_parse_prefixed_name(_YA, $1, $3) < 0) YYABORT;
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clicon_debug(3, "qname -> NAME : NAME");}
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;
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element1 : ESLASH {_YA->ya_xelement = NULL;
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clicon_debug(3, "element1 -> />");}
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| '>' { xml_parse_endslash_pre(_YA); }
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list { xml_parse_endslash_mid(_YA); }
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etg { xml_parse_endslash_post(_YA);
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clicon_debug(3, "element1 -> > list etg");}
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;
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etg : BSLASH NAME '>'
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{ clicon_debug(3, "etg -> < </ NAME %s>", $2); if (xml_parse_bslash1(_YA, $2) < 0) YYABORT; }
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| BSLASH NAME ':' NAME '>'
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{ if (xml_parse_bslash2(_YA, $2, $4) < 0) YYABORT;
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clicon_debug(3, "etg -> < </ NAME:NAME >"); }
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;
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list : list content { clicon_debug(3, "list -> list content"); }
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| content { clicon_debug(3, "list -> content"); }
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;
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content : element { clicon_debug(3, "content -> element"); }
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| comment { clicon_debug(3, "content -> comment"); }
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| CHARDATA { if (xml_parse_content(_YA, $1) < 0) YYABORT;
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clicon_debug(3, "content -> CHARDATA %s", $1); }
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| { clicon_debug(3, "content -> "); }
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;
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comment : BCOMMENT ECOMMENT
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;
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attrs : attrs attr
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;
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attr : NAME '=' attvalue { if (xml_parse_attr(_YA, NULL, $1, $3) < 0) YYABORT; }
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| NAME ':' NAME '=' attvalue { if (xml_parse_attr(_YA, $1, $3, $5) < 0) YYABORT; }
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;
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attvalue : '\"' CHARDATA '\"' { $$=$2; /* $2 must be consumed */}
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| '\"' '\"' { $$=strdup(""); /* $2 must be consumed */}
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;
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%%
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