151 lines
4.5 KiB
Text
151 lines
4.5 KiB
Text
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2019 Olof Hagsand
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Copyright (C) 2020-2021 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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*
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* "api-path" is "URI-encoded path expression" definition in RFC8040 3.53.
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* BNF:
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* <api-path> := <root> ("/" (<api-identifier> | <list-instance>))*
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* <root> := <string>
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* <api-identifier> := [<module-name> ":"] <identifier>
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* <module-name> := <identifier>
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* <list-instance> := <api-identifier> "=" key-value *("," key-value)
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* <key-value> := <string>
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* <string> := <an unquoted string>
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* <identifier> := (<ALPHA> | "_") (<ALPHA> | <DIGIT> | "_" | "-" | ".")
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* @note 1. <root> is the RESTCONF root resource (Sec 3.3) omitted in all calls below, it is
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* assumed to be stripped from api-path before calling these functions.
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* @note 2. characters in a key value string are constrained, and some characters need to be
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* percent-encoded,
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* XXX For some reason, I cant use "return *string" in these rules, so I resort to symbols
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* (eg slash)
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*/
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%{
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#include "clixon_config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include "clixon_api_path_parse.tab.h" /* generated */
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#include <cligen/cligen.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_log.h"
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#include "clixon_string.h"
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#include "clixon_xml.h"
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#include "clixon_path.h"
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#include "clixon_api_path_parse.h"
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/* Redefine main lex function so that you can send arguments to it: _yy is added to arg list */
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#define YY_DECL int clixon_api_path_parselex(void *_ay)
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/* Dont use input function (use user-buffer) */
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#define YY_NO_INPUT
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/* typecast macro */
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#define _AY ((clixon_api_path_yacc *)_ay)
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#define MAXBUF 4*4*64*1024
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#undef clixon_api_path_parsewrap
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int
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clixon_api_path_parsewrap(void)
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{
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return 1;
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}
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%}
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namestart [A-Z_a-z]
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namechar [A-Z_a-z\-\.0-9]
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identifier {namestart}{namechar}*
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%x INIT
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%s KEYV
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%%
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<INIT,KEYV>[ \t]
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<INIT,KEYV>\n { _AY->ay_linenum++; }
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<INIT,KEYV>\r
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<INIT,KEYV><<EOF>> { return X_EOF; }
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<INIT>\/ { return SLASH;}
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<INIT>\= { BEGIN(KEYV); return EQUAL; }
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<INIT>\: { return COLON; }
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<INIT>{identifier} { clixon_api_path_parselval.string = strdup(yytext);
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return IDENTIFIER; }
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<INIT>. { clixon_api_path_parseerror(_AY, "LEXICAL ERROR\n"); return -1; }
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<KEYV>\, { return COMMA; }
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<KEYV>\/ { BEGIN(INIT); return SLASH; }
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<KEYV>[^:/?#\[\]@,]+ { clixon_api_path_parselval.string = strdup(yytext);
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return STRING;}
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<KEYV>. { clixon_api_path_parseerror(_AY, "LEXICAL ERROR\n"); return -1; }
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%%
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/*! Initialize scanner.
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*/
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int
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api_path_scan_init(clixon_api_path_yacc *ay)
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{
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BEGIN(INIT);
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ay->ay_lexbuf = yy_scan_string(ay->ay_parse_string);
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#if 1 /* XXX: just to use unput to avoid warning */
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if (0)
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yyunput(0, "");
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#endif
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return 0;
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}
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/*
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* free buffers
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* Even within Flex version 2.5 (this is assumed), freeing buffers is different.
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*/
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int
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api_path_scan_exit(clixon_api_path_yacc *ay)
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{
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yy_delete_buffer(ay->ay_lexbuf);
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clixon_api_path_parselex_destroy(); /* modern */
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return 0;
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}
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