libs/web/src/template_parser.h

   1 /*
   2  * LuCI Template - Parser header
   3  *
   4  *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
   5  *
   6  *  Licensed under the Apache License, Version 2.0 (the "License");
   7  *  you may not use this file except in compliance with the License.
   8  *  You may obtain a copy of the License at
   9  *
  10  *      http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  */
  18
  19 #ifndef _TEMPLATE_PARSER_H_
  20 #define _TEMPLATE_PARSER_H_
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <string.h>
  27 #include <ctype.h>
  28
  29 #include <lua.h>
  30 #include <lualib.h>
  31 #include <lauxlib.h>
  32
  33
  34 #define T_READBUFSZ                     1024
  35 #define T_OUTBUFSZ                      T_READBUFSZ * 3
  36
  37 /* parser states */
  38 #define T_STATE_TEXT_INIT       0
  39 #define T_STATE_TEXT_NEXT       1
  40 #define T_STATE_CODE_INIT       2
  41 #define T_STATE_CODE_NEXT       3
  42 #define T_STATE_SKIP            4
  43
  44 /* parser flags */
  45 #define T_FLAG_EOF                      0x01
  46 #define T_FLAG_SKIPWS           0x02
  47
  48 /* tokens used in matching and expression generation */
  49 #define T_TOK_START                     "<%"
  50 #define T_TOK_END                       "%>"
  51 #define T_TOK_SKIPWS            "-"
  52
  53 /* generator flags */
  54 #define T_GEN_START                     0x01
  55 #define T_GEN_END                       0x02
  56
  57 /* code types */
  58 #define T_TYPE_TEXT                     0
  59 #define T_TYPE_COMMENT          1
  60 #define T_TYPE_EXPR                     2
  61 #define T_TYPE_INCLUDE          3
  62 #define T_TYPE_I18N                     4
  63 #define T_TYPE_I18N_RAW         5
  64 #define T_TYPE_CODE                     6
  65
  66 /* parser state */
  67 struct template_parser {
  68         int fd;
  69         int bufsize;
  70         int outsize;
  71         int state;
  72         int flags;
  73         int type;
  74         char buf[T_READBUFSZ];
  75         char out[T_OUTBUFSZ];
  76 };
  77
  78
  79 const char *template_reader(lua_State *L, void *ud, size_t *sz);
  80
  81 #endif