| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2010 Robert Bieber |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| |
| #include <stdio.h> |
| #include <ctype.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "skin_scan.h" |
| #include "skin_debug.h" |
| #include "symbols.h" |
| #include "skin_parser.h" |
| |
| /* Scanning Functions */ |
| |
| /* Simple function to advance a char* past a comment */ |
| void skip_comment(const char** document) |
| { |
| while(**document != '\n' && **document != '\0') |
| (*document)++; |
| if(**document == '\n') |
| (*document)++; |
| } |
| |
| void skip_arglist(const char** document) |
| { |
| if(**document == ARGLISTOPENSYM) |
| (*document)++; |
| while(**document && **document != ARGLISTCLOSESYM) |
| { |
| if(**document == TAGSYM) |
| { |
| (*document)++; |
| if(**document == '\0') |
| break; |
| (*document)++; |
| } |
| else if(**document == ARGLISTOPENSYM) |
| skip_arglist(document); |
| else if(**document == ENUMLISTOPENSYM) |
| skip_enumlist(document); |
| else if(**document == COMMENTSYM) |
| skip_comment(document); |
| else |
| (*document)++; |
| } |
| if(**document == ARGLISTCLOSESYM) |
| (*document)++; |
| } |
| |
| void skip_enumlist(const char** document) |
| { |
| if(**document == ENUMLISTOPENSYM) |
| (*document)++; |
| while(**document && **document != ENUMLISTCLOSESYM) |
| { |
| if(**document == TAGSYM) |
| { |
| (*document)++; |
| if(**document == '\0') |
| break; |
| (*document)++; |
| } |
| else if(**document == ARGLISTOPENSYM) |
| skip_arglist(document); |
| else if(**document == ENUMLISTOPENSYM) |
| skip_enumlist(document); |
| else if(**document == COMMENTSYM) |
| skip_comment(document); |
| else |
| (*document)++; |
| } |
| |
| if(**document == ENUMLISTCLOSESYM) |
| (*document)++; |
| } |
| |
| char* scan_string(const char** document) |
| { |
| |
| const char* cursor = *document; |
| int length = 0; |
| char* buffer = NULL; |
| int i; |
| |
| while(*cursor != ARGLISTSEPARATESYM && *cursor != ARGLISTCLOSESYM && |
| *cursor != '\0') |
| { |
| if(*cursor == COMMENTSYM) |
| { |
| skip_comment(&cursor); |
| continue; |
| } |
| |
| if(*cursor == TAGSYM) |
| cursor++; |
| |
| if(*cursor == '\n') |
| { |
| skin_error(UNEXPECTED_NEWLINE, cursor); |
| return NULL; |
| } |
| |
| length++; |
| cursor++; |
| } |
| |
| /* Copying the string */ |
| cursor = *document; |
| buffer = skin_alloc_string(length); |
| if (!buffer) |
| return NULL; |
| buffer[length] = '\0'; |
| for(i = 0; i < length; i++) |
| { |
| if(*cursor == TAGSYM) |
| cursor++; |
| |
| if(*cursor == COMMENTSYM) |
| { |
| skip_comment(&cursor); |
| i--; |
| continue; |
| } |
| |
| buffer[i] = *cursor; |
| cursor++; |
| } |
| |
| *document = cursor; |
| return buffer; |
| } |
| |
| int scan_int(const char** document) |
| { |
| |
| const char *cursor = *document, *end; |
| int length = 0; |
| char buffer[16]; |
| int retval; |
| int i; |
| |
| while(isdigit(*cursor) || *cursor == COMMENTSYM || *cursor == '-') |
| { |
| if(*cursor == COMMENTSYM) |
| { |
| skip_comment(&cursor); |
| continue; |
| } |
| |
| length++; |
| cursor++; |
| } |
| if (length > 15) |
| length = 15; |
| end = cursor; |
| /* Copying to the buffer while avoiding comments */ |
| cursor = *document; |
| buffer[length] = '\0'; |
| for(i = 0; i < length; i++) |
| { |
| if(*cursor == COMMENTSYM) |
| { |
| skip_comment(&cursor); |
| i--; |
| continue; |
| } |
| |
| buffer[i] = *cursor; |
| cursor++; |
| |
| } |
| retval = atoi(buffer); |
| |
| *document = end; |
| return retval; |
| } |
| |
| int check_viewport(const char* document) |
| { |
| if(strlen(document) < 3) |
| return 0; |
| |
| if(document[0] != TAGSYM) |
| return 0; |
| |
| if(document[1] != 'V') |
| return 0; |
| |
| if(document[2] != ARGLISTOPENSYM |
| && document[2] != 'l' |
| && document[2] != 'i') |
| return 0; |
| |
| return 1; |
| } |