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     for(/*NO INIT*/;**document != '\n' && **document != '\0'; (*document)++);
  38     if(**document == '\n')
  39         (*document)++;
  40 }
  41
  42 void skip_whitespace(char** document)
  43 {
  44     for(/*NO INIT*/; **document == ' ' || **document == '\t'; (*document)++);
  45 }
  46
  47 char* scan_string(char** document)
  48 {
  49
  50     char* cursor = *document;
  51     int length = 0;
  52     char* buffer = NULL;
  53     int i;
  54
  55     while(*cursor != ARGLISTSEPERATESYM && *cursor != ARGLISTCLOSESYM &&
  56           *cursor != '\0')
  57     {
  58         if(*cursor == COMMENTSYM)
  59         {
  60             skip_comment(&cursor);
  61             continue;
  62         }
  63
  64         if(*cursor == TAGSYM)
  65             cursor++;
  66
  67         if(*cursor == '\n')
  68         {
  69             skin_error(UNEXPECTED_NEWLINE);
  70             return NULL;
  71         }
  72
  73         length++;
  74         cursor++;
  75     }
  76
  77     /* Copying the string */
  78     cursor = *document;
  79     buffer = skin_alloc_string(length);
  80     buffer[length] = '\0';
  81     for(i = 0; i < length; i++)
  82     {
  83         if(*cursor == TAGSYM)
  84             cursor++;
  85
  86         if(*cursor == COMMENTSYM)
  87         {
  88             skip_comment(&cursor);
  89             i--;
  90             continue;
  91         }
  92
  93         buffer[i] = *cursor;
  94         cursor++;
  95     }
  96
  97     *document = cursor;
  98     return buffer;
  99 }
 100
 101 int scan_int(char** document)
 102 {
 103
 104     char* cursor = *document;
 105     int length = 0;
 106     char* buffer = NULL;
 107     int retval;
 108     int i;
 109
 110     while(isdigit(*cursor) || *cursor == COMMENTSYM)
 111     {
 112         if(*cursor == COMMENTSYM)
 113         {
 114             skip_comment(&cursor);
 115             continue;
 116         }
 117
 118         length++;
 119         cursor++;
 120     }
 121
 122     buffer = skin_alloc_string(length);
 123
 124     /* Copying to the buffer while avoiding comments */
 125     cursor = *document;
 126     buffer[length] = '\0';
 127     for(i = 0; i < length; i++)
 128     {
 129         if(*cursor == COMMENTSYM)
 130         {
 131             skip_comment(&cursor);
 132             i--;
 133             continue;
 134         }
 135
 136         buffer[i] = *cursor;
 137         cursor++;
 138
 139     }
 140     retval = atoi(buffer);
 141     free(buffer);
 142
 143     *document = cursor;
 144     return retval;
 145 }
 146
 147 int check_viewport(char* document)
 148 {
 149     if(strlen(document) < 3)
 150         return 0;
 151
 152     if(document[0] != TAGSYM)
 153         return 0;
 154
 155     if(document[1] != 'V')
 156         return 0;
 157
 158     if(document[2] != ARGLISTOPENSYM
 159        && document[2] != 'l'
 160        && document[2] != 'i')
 161         return 0;
 162
 163     return 1;
 164 }