utils/themeeditor/skin_scan.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Robert Bieber
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include <stdio.h>
  23 #include <ctype.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "skin_scan.h"
  28 #include "skin_debug.h"
  29 #include "symbols.h"
  30 #include "skin_parser.h"
  31
  32 /* Scanning Functions */
  33
  34 /* Simple function to advance a char* past a comment */
  35 void skip_comment(char** document)
  36 {
  37     while(**document != '\n' && **document != '\0')
  38         (*document)++;
  39     if(**document == '\n')
  40         (*document)++;
  41 }
  42
  43 void skip_whitespace(char** document)
  44 {
  45     while(**document == ' ' || **document == '\t')
  46         (*document)++;
  47 }
  48
  49 void skip_arglist(char** document)
  50 {
  51     if(**document == ARGLISTOPENSYM)
  52         (*document)++;
  53     while(**document && **document != ARGLISTCLOSESYM)
  54     {
  55         if(**document == TAGSYM)
  56         {
  57             (*document)++;
  58             if(**document == '\0')
  59                 break;
  60             (*document)++;
  61         }
  62         else if(**document == ARGLISTOPENSYM)
  63             skip_arglist(document);
  64         else if(**document == ENUMLISTOPENSYM)
  65             skip_enumlist(document);
  66         else if(**document == COMMENTSYM)
  67             skip_comment(document);
  68         else
  69             (*document)++;
  70     }
  71     if(**document == ARGLISTCLOSESYM)
  72         (*document)++;
  73 }
  74
  75 void skip_enumlist(char** document)
  76 {
  77     if(**document == ENUMLISTOPENSYM)
  78         (*document)++;
  79     while(**document && **document != ENUMLISTCLOSESYM)
  80     {
  81         if(**document == TAGSYM)
  82         {
  83             (*document)++;
  84             if(**document == '\0')
  85                 break;
  86             (*document)++;
  87         }
  88         else if(**document == ARGLISTOPENSYM)
  89             skip_arglist(document);
  90         else if(**document == ENUMLISTOPENSYM)
  91             skip_enumlist(document);
  92         else if(**document == COMMENTSYM)
  93             skip_comment(document);
  94         else
  95             (*document)++;
  96     }
  97
  98     if(**document == ENUMLISTCLOSESYM)
  99         (*document)++;
 100 }
 101
 102 char* scan_string(char** document)
 103 {
 104
 105     char* cursor = *document;
 106     int length = 0;
 107     char* buffer = NULL;
 108     int i;
 109
 110     while(*cursor != ARGLISTSEPERATESYM && *cursor != ARGLISTCLOSESYM &&
 111           *cursor != '\0')
 112     {
 113         if(*cursor == COMMENTSYM)
 114         {
 115             skip_comment(&cursor);
 116             continue;
 117         }
 118
 119         if(*cursor == TAGSYM)
 120             cursor++;
 121
 122         if(*cursor == '\n')
 123         {
 124             skin_error(UNEXPECTED_NEWLINE);
 125             return NULL;
 126         }
 127
 128         length++;
 129         cursor++;
 130     }
 131
 132     /* Copying the string */
 133     cursor = *document;
 134     buffer = skin_alloc_string(length);
 135     buffer[length] = '\0';
 136     for(i = 0; i < length; i++)
 137     {
 138         if(*cursor == TAGSYM)
 139             cursor++;
 140
 141         if(*cursor == COMMENTSYM)
 142         {
 143             skip_comment(&cursor);
 144             i--;
 145             continue;
 146         }
 147
 148         buffer[i] = *cursor;
 149         cursor++;
 150     }
 151
 152     *document = cursor;
 153     return buffer;
 154 }
 155
 156 int scan_int(char** document)
 157 {
 158
 159     char* cursor = *document, *end;
 160     int length = 0;
 161     char buffer[16];
 162     int retval;
 163     int i;
 164
 165     while(isdigit(*cursor) || *cursor == COMMENTSYM || *cursor == '-')
 166     {
 167         if(*cursor == COMMENTSYM)
 168         {
 169             skip_comment(&cursor);
 170             continue;
 171         }
 172
 173         length++;
 174         cursor++;
 175     }
 176     if (length > 15)
 177         length = 15;
 178     end = cursor;
 179     /* Copying to the buffer while avoiding comments */
 180     cursor = *document;
 181     buffer[length] = '\0';
 182     for(i = 0; i < length; i++)
 183     {
 184         if(*cursor == COMMENTSYM)
 185         {
 186             skip_comment(&cursor);
 187             i--;
 188             continue;
 189         }
 190
 191         buffer[i] = *cursor;
 192         cursor++;
 193
 194     }
 195     retval = atoi(buffer);
 196
 197     *document = end;
 198     return retval;
 199 }
 200
 201 int check_viewport(char* document)
 202 {
 203     if(strlen(document) < 3)
 204         return 0;
 205
 206     if(document[0] != TAGSYM)
 207         return 0;
 208
 209     if(document[1] != 'V')
 210         return 0;
 211
 212     if(document[2] != ARGLISTOPENSYM
 213        && document[2] != 'l'
 214        && document[2] != 'i')
 215         return 0;
 216
 217     return 1;
 218 }