301 lines
9.1 KiB
Text
301 lines
9.1 KiB
Text
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2022 Olof Hagsand and Rubicon Communications, LLC(Netgate)
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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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* TEXT / curly-brace syntax parsing and translations
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*/
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%union {
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char *string;
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void *stack;
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}
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%token MY_EOF
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%token <string> TOKEN
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%type <stack> stmts
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%type <stack> stmt
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%type <stack> id
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%type <string> value
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%type <stack> values
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%type <string> substr
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%start top
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%lex-param {void *_ts} /* Add this argument to parse() and lex() function */
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%parse-param {void *_ts}
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%{
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/* typecast macro */
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#define _TS ((clixon_text_syntax_yacc *)_ts)
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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 <strings.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/time.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clixon */
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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_err.h"
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#include "clixon_log.h"
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#include "clixon_debug.h"
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#include "clixon_string.h"
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#include "clixon_xml_nsctx.h"
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#include "clixon_xml_vec.h"
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#include "clixon_data.h"
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#include "clixon_text_syntax_parse.h"
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/* Enable for debugging, steals some cycles otherwise */
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#if 0
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#define _PARSE_DEBUG(s) clixon_debug(CLIXON_DBG_PARSE|CLIXON_DBG_DETAIL,(s))
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#else
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#define _PARSE_DEBUG(s)
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#endif
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void
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clixon_text_syntax_parseerror(void *arg,
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char *s)
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{
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clixon_text_syntax_yacc *ts = (clixon_text_syntax_yacc *)arg;
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clixon_err(OE_XML, XMLPARSE_ERRNO, "text_syntax_parse: line %d: %s: at or before: %s",
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ts->ts_linenum,
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s,
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clixon_text_syntax_parsetext);
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return;
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}
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static cxobj*
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text_add_value(cxobj *xn,
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char *value)
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{
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cxobj *xb = NULL;
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if ((xb = xml_new("body", xn, CX_BODY)) == NULL)
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goto done;
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if (xml_value_set(xb, value) < 0){
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xml_free(xb);
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xb = NULL;
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goto done;
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}
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done:
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return xb;
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}
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/*! Create XML node prefix:id
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*/
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static cxobj*
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text_create_node(clixon_text_syntax_yacc *ts,
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char *name)
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{
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cxobj *xn = NULL;
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yang_stmt *ymod;
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char *ns;
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char *prefix = NULL;
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char *id = NULL;
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if (nodeid_split(name, &prefix, &id) < 0)
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goto done;
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if ((xn = xml_new(id, NULL, CX_ELMNT)) == NULL)
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goto done;
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if (prefix && ts->ts_yspec){
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/* Silently ignore if module name not found */
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if ((ymod = yang_find(ts->ts_yspec, Y_MODULE, prefix)) != NULL){
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if ((ns = yang_find_mynamespace(ymod)) == NULL){
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clixon_err(OE_YANG, 0, "No namespace");
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goto done;
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}
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/* Set default namespace */
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if (xmlns_set(xn, NULL, ns) < 0)
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goto done;
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}
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}
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done:
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if (prefix)
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free(prefix);
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if (id)
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free(id);
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return xn;
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}
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static char*
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strjoin(char *str0,
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char *str1)
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{
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size_t len0;
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size_t len;
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len0 = str0?strlen(str0):0;
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len = len0 + strlen(str1) + 1;
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if ((str0 = realloc(str0, len)) == NULL){
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clixon_err(OE_YANG, errno, "realloc");
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return NULL;
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}
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strcpy(str0+len0, str1);
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return str0;
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}
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/*! Given a vector of XML bodies, transform it to a vector of ELEMENT entries copied from x1
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*/
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static int
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text_element_create(clixon_xvec *xvec0,
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cxobj *x1,
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clixon_xvec *xvec1)
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{
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int retval = -1;
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cxobj *xb;
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cxobj *x2;
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int i;
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for (i=0; i<clixon_xvec_len(xvec1); i++){
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xb = clixon_xvec_i(xvec1, i);
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if ((x2 = xml_dup(x1)) == NULL)
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goto done;
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if (xml_addsub(x2, xb) < 0)
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goto done;
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if (clixon_xvec_append(xvec0, x2) < 0)
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goto done;
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}
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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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/*! Special mechanism to mark bodies so they will not be filtered as whitespace
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*
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* @see strip_body_objects text_populate_list
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*/
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static int
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text_mark_bodies(clixon_xvec *xv)
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{
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int i;
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cxobj *xb;
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for (i=0; i<clixon_xvec_len(xv); i++){
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xb = clixon_xvec_i(xv, i);
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xml_flag_set(xb, XML_FLAG_BODYKEY);
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}
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return 0;
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}
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%}
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%%
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top : stmt MY_EOF { _PARSE_DEBUG("top->stmt");
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if (clixon_child_xvec_append(_TS->ts_xtop, $1) < 0) YYERROR;
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clixon_xvec_free($1);
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YYACCEPT; }
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;
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stmts : stmts stmt { _PARSE_DEBUG("stmts->stmts stmt");
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if (clixon_xvec_merge($1, $2) < 0) YYERROR;
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clixon_xvec_free($2);
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$$ = $1;
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}
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| { _PARSE_DEBUG("stmts->stmt");
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if (($$ = clixon_xvec_new()) == NULL) YYERROR;
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}
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;
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stmt : id values ';' { _PARSE_DEBUG("stmt-> id value ;");
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text_mark_bodies($2);
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if (($$ = clixon_xvec_new()) == NULL) YYERROR;
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if (text_element_create($$, $1, $2) < 0) YYERROR;
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xml_free($1);
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clixon_xvec_free($2);
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}
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| id values '{' stmts '}' { _PARSE_DEBUG("stmt-> id values { stmts }");
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text_mark_bodies($2);
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if (clixon_child_xvec_append($1, $2) < 0) YYERROR;
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clixon_xvec_free($2);
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if (clixon_child_xvec_append($1, $4) < 0) YYERROR;
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clixon_xvec_free($4);
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if (($$ = clixon_xvec_new()) == NULL) YYERROR;
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if (clixon_xvec_append($$, $1) < 0) YYERROR;
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}
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| id '[' values ']'
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{ _PARSE_DEBUG("stmt-> id [ values ]");
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if (($$ = clixon_xvec_new()) == NULL) YYERROR;
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if (text_element_create($$, $1, $3) < 0) YYERROR;
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xml_free($1);
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clixon_xvec_free($3);
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}
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;
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id : TOKEN { _PARSE_DEBUG("id->TOKEN");
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if (($$ = text_create_node(_TS, $1)) == NULL) YYERROR;
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free($1);
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}
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;
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/* Array of body objects, possibly empty */
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values : values value { _PARSE_DEBUG("values->values value");
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cxobj* x;
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if ((x = text_add_value(NULL, $2)) == NULL) YYERROR;;
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free($2);
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if (clixon_xvec_append($1, x) < 0) YYERROR;
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$$ = $1;
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}
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| { _PARSE_DEBUG("values->value");
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if (($$ = clixon_xvec_new()) == NULL) YYERROR;
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}
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;
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/* Returns single string either as a single token or contained by double quotes */
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value : TOKEN { _PARSE_DEBUG("value->TOKEN");
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$$=$1;
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}
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| '"' substr '"' { _PARSE_DEBUG("value-> \" substr \"");
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$$=$2;
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}
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;
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/* Value within quotes merged to single string, has separate lexical scope */
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substr : substr TOKEN { _PARSE_DEBUG("substr->substr TOKEN");
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$$ = strjoin($1, $2); free($2);}
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| { _PARSE_DEBUG("substr->");
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$$ = NULL; }
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;
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%%
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