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
  26 #include "skin_scan.h"
  27 #include "skin_debug.h"
  28 #include "symbols.h"
  29 #include "skin_parser.h"
  30
  31 /* Scanning Functions */
  32
  33 /* Simple function to advance a char* past a comment */
  34 void skip_comment(char** document)
  35 {
  36     for(/*NO INIT*/;**document != '\n' && **document != '\0'; (*document)++);
  37     if(**document == '\n')
  38         (*document)++;
  39 }
  40
  41 void skip_whitespace(char** document)
  42 {
  43     for(/*NO INIT*/; **document == ' ' || **document == '\t'; (*document)++);
  44 }
  45
  46 char* scan_string(char** document)
  47 {
  48
  49     char* cursor = *document;
  50     int length = 0;
  51     char* buffer = NULL;
  52     int i;
  53
  54     while(*cursor != ARGLISTSEPERATESYM && *cursor != ARGLISTCLOSESYM &&
  55           *cursor != '\0')
  56     {
  57         if(*cursor == COMMENTSYM)
  58         {
  59             skip_comment(&cursor);
  60             continue;
  61         }
  62
  63         if(*cursor == '\n')
  64         {
  65             skin_error(UNEXPECTED_NEWLINE);
  66             return NULL;
  67         }
  68
  69         length++;
  70         cursor++;
  71     }
  72
  73     /* Copying the string */
  74     cursor = *document;
  75     buffer = skin_alloc_string(length);
  76     buffer[length] = '\0';
  77     for(i = 0; i < length; i++)
  78     {
  79         if(*cursor == COMMENTSYM)
  80         {
  81             skip_comment(&cursor);
  82             i--;
  83             continue;
  84         }
  85
  86         buffer[i] = *cursor;
  87         cursor++;
  88     }
  89
  90     *document = cursor;
  91     return buffer;
  92 }
  93
  94 int scan_int(char** document)
  95 {
  96
  97     char* cursor = *document;
  98     int length = 0;
  99     char* buffer = NULL;
 100     int retval;
 101     int i;
 102
 103     while(isdigit(*cursor) || *cursor == COMMENTSYM)
 104     {
 105         if(*cursor == COMMENTSYM)
 106         {
 107             skip_comment(&cursor);
 108             continue;
 109         }
 110
 111         length++;
 112         cursor++;
 113     }
 114
 115     buffer = skin_alloc_string(length);
 116
 117     /* Copying to the buffer while avoiding comments */
 118     cursor = *document;
 119     buffer[length] = '\0';
 120     for(i = 0; i < length; i++)
 121     {
 122         if(*cursor == COMMENTSYM)
 123         {
 124             skip_comment(&cursor);
 125             i--;
 126             continue;
 127         }
 128
 129         buffer[i] = *cursor;
 130         cursor++;
 131
 132     }
 133     retval = atoi(buffer);
 134     free(buffer);
 135
 136     *document = cursor;
 137     return retval;
 138 }