language.h

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/*
 * This file is part of LibCSS.
 * Licensed under the MIT License,
 *                http://www.opensource.org/licenses/mit-license.php
 * Copyright 2008 John-Mark Bell <jmb@netsurf-browser.org>
 */
 
#ifndef css_css__parse_language_h_
#define css_css__parse_language_h_
 
#include <parserutils/utils/stack.h>
#include <parserutils/utils/vector.h>
 
#include <libcss/functypes.h>
#include <libcss/types.h>
 
#include "lex/lex.h"
#include "parse/parse.h"
#include "parse/propstrings.h"
 
typedef struct css_namespace {
    lwc_string *prefix;     
    lwc_string *uri;        
} css_namespace;
 
typedef struct css_language {
    css_stylesheet *sheet;      
#define STACK_CHUNK 32
    parserutils_stack *context; 
    enum {
        CHARSET_PERMITTED,
        IMPORT_PERMITTED,
        NAMESPACE_PERMITTED,
        HAD_RULE
    } state;            
    lwc_string **strings;
 
    lwc_string *default_namespace;  
    css_namespace *namespaces;  
    uint32_t num_namespaces;    
} css_language;
 
css_error css__language_create(css_stylesheet *sheet, css_parser *parser,
        void **language);
css_error css__language_destroy(css_language *language);
 
/******************************************************************************
 * Helper functions                                                           *
 ******************************************************************************/
 
static inline void consumeWhitespace(const parserutils_vector *vector, int32_t *ctx)
{
    const css_token *token = NULL;
 
    while ((token = parserutils_vector_peek(vector, *ctx)) != NULL &&
            token->type == CSS_TOKEN_S)
        parserutils_vector_iterate(vector, ctx);
}
 
static inline bool tokenIsChar(const css_token *token, uint8_t c)
{
    bool result = false;
 
    if (token != NULL && token->type == CSS_TOKEN_CHAR &&
                    lwc_string_length(token->idata) == 1) {
        char d = lwc_string_data(token->idata)[0];
 
        /* Ensure lowercase comparison */
        if ('A' <= d && d <= 'Z')
            d += 'a' - 'A';
 
        result = (d == c);
    }
 
    return result;
}
 
#endif