/* * 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" /** * CSS namespace mapping */typedef struct css_namespace {	lwc_string *prefix;		/**< Namespace prefix */	lwc_string *uri;		/**< Namespace URI */} css_namespace; /** * Context for a CSS language parser */typedef struct css_language {	css_stylesheet *sheet;		/**< The stylesheet to parse for */ #define STACK_CHUNK 32	parserutils_stack *context;	/**< Context stack */ 	enum {		CHARSET_PERMITTED,		IMPORT_PERMITTED,		NAMESPACE_PERMITTED,		HAD_RULE	} state;			/**< State flag, for at-rule handling */ 	/** \todo These should be statically allocated */	/** Interned strings */	lwc_string *strings[LAST_KNOWN]; 	lwc_string *default_namespace;	/**< Default namespace URI */	css_namespace *namespaces;	/**< Array of namespace mappings */	uint32_t num_namespaces;	/**< Number of namespace mappings */ 	css_allocator_fn alloc;		/**< Memory (de)allocation function */	void *pw;			/**< Client's private data */} css_language; css_error css__language_create(css_stylesheet *sheet, css_parser *parser,		css_allocator_fn alloc, void *pw, void **language);css_error css__language_destroy(css_language *language); /****************************************************************************** * Helper functions                                                           * ******************************************************************************/ /** * Consume all leading whitespace tokens * * \param vector  The vector to consume from * \param ctx     The vector's context */static inline void consumeWhitespace(const parserutils_vector *vector, int *ctx){	const css_token *token = NULL; 	while ((token = parserutils_vector_peek(vector, *ctx)) != NULL &&			token->type == CSS_TOKEN_S)		parserutils_vector_iterate(vector, ctx);} /** * Determine if a token is a character * * \param token  The token to consider * \param c      The character to match (lowercase ASCII only) * \return True if the token matches, false otherwise */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