selector.e

HTML-XML-utils由一套小型C程序（过滤器）组成

 typedef enum {				 
  Root, NthChild, NthOfType, FirstChild, FirstOfType, Lang
} PseudoType;
 typedef struct _PseudoCond {
  PseudoType type;
  int a, b;					 
  string s;					 
  struct _PseudoCond *next;
} PseudoCond;
 typedef enum {				 
  Exists, Equals, Includes, StartsWith, EndsWidth, Contains, LangMatch,
  HasClass, HasID				 
} Operator;
 typedef struct _AttribCond {
  Operator op;
  string name;					 
  string value;					 
  struct _AttribCond *next;
} AttribCond;
 typedef enum {
  Descendant, Child, Adjacent, Sibling
} Combinator;
 typedef struct _SimpleSelector {
  string name;					 
  AttribCond *attribs;
  PseudoCond *pseudos;
  Combinator combinator;			 
  struct _SimpleSelector *context;
} SimpleSelector, *Selector;
 string selector_to_string(const Selector selector);
 Selector parse_selector(const string selector);