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Move the skin parser to a seperate library

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26877 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jonathan Gordon 2010-06-17 06:52:02 +00:00
parent ca564287ee
commit 36b934d241
11 changed files with 45 additions and 12 deletions
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218
lib/skin_parser/skin_scan.c Normal file
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@ -0,0 +1,218 @@
/***************************************************************************
* __________ __ ___.
* 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(char** document)
{
while(**document != '\n' && **document != '\0')
(*document)++;
if(**document == '\n')
(*document)++;
}
void skip_whitespace(char** document)
{
while(**document == ' ' || **document == '\t')
(*document)++;
}
void skip_arglist(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(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(char** document)
{
char* cursor = *document;
int length = 0;
char* buffer = NULL;
int i;
while(*cursor != ARGLISTSEPERATESYM && *cursor != ARGLISTCLOSESYM &&
*cursor != '\0')
{
if(*cursor == COMMENTSYM)
{
skip_comment(&cursor);
continue;
}
if(*cursor == TAGSYM)
cursor++;
if(*cursor == '\n')
{
skin_error(UNEXPECTED_NEWLINE);
return NULL;
}
length++;
cursor++;
}
/* Copying the string */
cursor = *document;
buffer = skin_alloc_string(length);
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(char** document)
{
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(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;
}