Regexp.c File Reference

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "Hash.h"
#include "Regexp.h"

Go to the source code of this file.

Macros
#define	_Class   _Regexp

Functions
Class *	_Regexp (void)
static Object *	copy (const Object *self)
static void	dealloc (Object *self)
static String *	description (const Object *self)
static int	hash (const Object *self)
static void	initialize (Class *clazz)
static Regexp *	initWithPattern (Regexp *self, const char *pattern, int options)
static bool	isEqual (const Object *self, const Object *other)
static bool	matchesCharacters (const Regexp *self, const char *chars, int options, Range **ranges)
static bool	matchesString (const Regexp *self, const String *string, int options, Range **ranges)
Regexp *	re (const char *pattern, int options)

Macro Definition Documentation

_Class

#define _Class   _Regexp

Definition at line 31 of file Regexp.c.

Function Documentation

_Regexp()

Class * _Regexp

(

void

)

Definition at line 199 of file Regexp.c.

                     {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "Regexp",
      .superclass = _Object(),
      .instanceSize = sizeof(Regexp),
      .interfaceOffset = offsetof(Regexp, interface),
      .interfaceSize = sizeof(RegexpInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}

copy()

static Object * copy ( const Object *  self )

static

See also

Object::copy(const Object *)

Definition at line 38 of file Regexp.c.

                                        {
 
  const Regexp *this = (Regexp *) self;
 
  return (Object *) re(this->pattern, this->options);
}

dealloc()

static void dealloc ( Object *  self )

static

See also

Object::dealloc(Object *)

Definition at line 48 of file Regexp.c.

                                  {
 
  Regexp *this = (Regexp *) self;
 
  regfree(this->regex);
  free(this->regex);
 
  super(Object, self, dealloc);
}

description()

static String * description ( const Object *  self )

static

See also

Object::description(const Object *)

Definition at line 61 of file Regexp.c.

                                               {
 
  const Regexp *this = (Regexp *) self;
 
  return $$(String, stringWithCharacters, this->pattern);
}

hash()

static int hash ( const Object *  self )

static

See also

Object::hash(const Object *)

Definition at line 71 of file Regexp.c.

                                    {
 
  Regexp *this = (Regexp *) self;
 
  int hash = HASH_SEED;
  hash = HashForInteger(hash, this->options);
 
  const Range range = { 0, strlen(this->pattern) };
  hash = HashForBytes(hash, (uint8_t *) this->pattern, range);
 
  return hash;
}

initialize()

static void initialize ( Class *  clazz )

static

See also

Class::initialize(Class *)

Definition at line 182 of file Regexp.c.

                                     {
 
  ((ObjectInterface *) clazz->interface)->copy = copy;
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
  ((ObjectInterface *) clazz->interface)->description = description;
  ((ObjectInterface *) clazz->interface)->hash = hash;
  ((ObjectInterface *) clazz->interface)->isEqual = isEqual;
 
  ((RegexpInterface *) clazz->interface)->initWithPattern = initWithPattern;
  ((RegexpInterface *) clazz->interface)->matchesCharacters = matchesCharacters;
  ((RegexpInterface *) clazz->interface)->matchesString = matchesString;
}

initWithPattern()

static Regexp * initWithPattern ( Regexp *  self, const char *  pattern, int  options  )

static

Definition at line 112 of file Regexp.c.

                                                                               {
 
  self = (Regexp *) super(Object, self, init);
  if (self) {
    self->regex = calloc(1, sizeof(regex_t));
    assert(self->regex);
 
    const int err = regcomp(self->regex, pattern, REG_EXTENDED | options);
    assert(err == 0);
 
    self->pattern = pattern;
    self->options = options;
    self->numberOfSubExpressions = ((regex_t *) self->regex)->re_nsub;
  }
 
  return self;
}

isEqual()

static bool isEqual ( const Object *  self, const Object *  other  )

static

See also

Object::isEqual(const Object *, const Object *)

Definition at line 87 of file Regexp.c.

                                                             {
 
  if (super(Object, self, isEqual, other)) {
    return true;
  }
 
  if (other && $(other, isKindOfClass, _Regexp())) {
 
    const Regexp *this = (Regexp *) self;
    const Regexp *that = (Regexp *) other;
 
    if (this->options == that->options) {
      return strcmp(this->pattern, that->pattern) == 0;
    }
  }
 
  return false;
}

matchesCharacters()

static bool matchesCharacters ( const Regexp *  self, const char *  chars, int  options, Range **  ranges  )

static

Definition at line 134 of file Regexp.c.

                                                                                                  {
 
  if (ranges) {
    const size_t numberOfMatches = self->numberOfSubExpressions + 1;
    regmatch_t matches[numberOfMatches];
 
    const int err = regexec(self->regex, chars, numberOfMatches, matches, options);
    assert(err == 0 || err == REG_NOMATCH);
 
    *ranges = calloc(numberOfMatches, sizeof(Range));
    assert(*ranges);
 
    Range *range = *ranges;
    const regmatch_t *match = matches;
    for (size_t i = 0; i < numberOfMatches; i++, range++, match++) {
      range->location = match->rm_so;
      if (range->location > -1) {
        range->length = match->rm_eo - match->rm_so;
      } else {
        range->length = 0;
      }
    }
 
    return err == 0;
  }
 
  const int err = regexec(self->regex, chars, 0, NULL, options);
  assert(err == 0 || err == REG_NOMATCH);
 
  return err == 0;
}

matchesString()

static bool matchesString ( const Regexp *  self, const String *  string, int  options, Range **  ranges  )

static

Definition at line 170 of file Regexp.c.

                                                                                                 {
 
  assert(string);
 
  return $(self, matchesCharacters, string->chars, options, ranges);
}

re()

Regexp * re ( const char *  pattern, int  options  )

related

Definition at line 219 of file Regexp.c.

                                             {
  return $(alloc(Regexp), initWithPattern, pattern, options);
}