Data.c File Reference

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "Data.h"
#include "Hash.h"

Go to the source code of this file.

Macros
#define	_Class   _Data
#define	DATA_BLOCK_SIZE   4096

Functions
Class *	_Data (void)
static void	appendBytes (Data *self, const uint8_t *bytes, size_t length)
static void	appendData (Data *self, const Data *data)
static Object *	copy (const Object *self)
static Data *	data (void)
static Data *	dataWithBytes (const uint8_t *bytes, size_t length)
static Data *	dataWithCapacity (size_t capacity)
static Data *	dataWithConstMemory (const ident mem, size_t length)
static Data *	dataWithContentsOfFile (const char *path)
static Data *	dataWithMemory (ident mem, size_t length)
static void	dealloc (Object *self)
static int	hash (const Object *self)
static Data *	init (Data *self)
static void	initialize (Class *clazz)
static Data *	initWithBytes (Data *self, const uint8_t *bytes, size_t length)
static Data *	initWithCapacity (Data *self, size_t capacity)
static Data *	initWithConstMemory (Data *self, const ident mem, size_t length)
static Data *	initWithContentsOfFile (Data *self, const char *path)
static Data *	initWithData (Data *self, const Data *data)
static Data *	initWithMemory (Data *self, ident mem, size_t length)
static bool	isEqual (const Object *self, const Object *other)
static void	setLength (Data *self, size_t length)
static bool	writeToFile (const Data *self, const char *path)

Macro Definition Documentation

_Class

#define _Class   _Data

Definition at line 32 of file Data.c.

DATA_BLOCK_SIZE

#define DATA_BLOCK_SIZE   4096

Definition at line 34 of file Data.c.

Function Documentation

_Data()

Class * _Data

(

void

)

Definition at line 419 of file Data.c.

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

appendBytes()

static void appendBytes ( Data *  self, const uint8_t *  bytes, size_t  length  )

static

Definition at line 262 of file Data.c.

                                                                         {
 
  const size_t oldLength = self->length;
 
  $(self, setLength, self->length + length);
 
  if (length) {
    memcpy(self->bytes + oldLength, bytes, length);
  }
}

appendData()

static void appendData ( Data *  self, const Data *  data  )

static

Definition at line 277 of file Data.c.

                                                     {
 
  $(self, appendBytes, data->bytes, data->length);
}

copy()

static Object * copy ( const Object *  self )

static

See also

Object::copy(const Object *)

Definition at line 41 of file Data.c.

                                        {
 
  const Data *this = (const Data *) self;
 
  Data *that = $(alloc(Data), initWithCapacity, this->capacity ?: this->length);
  $(that, appendBytes, this->bytes, this->length);
 
  return (Object *) that;
}

data()

static Data * data ( void  )

static

Definition at line 286 of file Data.c.

                        {
 
  return $(alloc(Data), init);
}

dataWithBytes()

static Data * dataWithBytes ( const uint8_t *  bytes, size_t  length  )

static

Definition at line 115 of file Data.c.

                                                                {
 
  return $(alloc(Data), initWithBytes, bytes, length);
}

dataWithCapacity()

static Data * dataWithCapacity ( size_t  capacity )

static

Definition at line 295 of file Data.c.

                                               {
 
  return $(alloc(Data), initWithCapacity, capacity);
}

dataWithConstMemory()

static Data * dataWithConstMemory ( const ident  mem, size_t  length  )

static

Definition at line 124 of file Data.c.

                                                                 {
 
  return $(alloc(Data), initWithConstMemory, mem, length);
}

dataWithContentsOfFile()

static Data * dataWithContentsOfFile ( const char *  path )

static

Definition at line 133 of file Data.c.

                                                      {
 
  return $(alloc(Data), initWithContentsOfFile, path);
}

dataWithMemory()

static Data * dataWithMemory ( ident  mem, size_t  length  )

static

Definition at line 142 of file Data.c.

                                                      {
 
  return $(alloc(Data), initWithMemory, mem, length);
}

dealloc()

static void dealloc ( Object *  self )

static

See also

Object::dealloc(Object *)

Definition at line 54 of file Data.c.

                                  {
 
  Data *this = (Data *) self;
 
  if (this->destroy) {
    if (this->bytes) {
      this->destroy(this->bytes);
    }
  }
 
  super(Object, self, dealloc);
}

hash()

static int hash ( const Object *  self )

static

See also

Object::hash(const Object *)

Definition at line 70 of file Data.c.

                                    {
 
  Data *this = (Data *) self;
 
  int hash = HASH_SEED;
  hash = HashForInteger(hash, this->length);
 
  const Range range = { 0, this->length };
  hash = HashForBytes(hash, this->bytes, range);
 
  return hash;
}

init()

static Data * init ( Data *  self )

static

Definition at line 304 of file Data.c.

                              {
 
  return $(self, initWithCapacity, 0);
}

initialize()

static void initialize ( Class *  clazz )

static

See also

Class::initialize(Class *)

Definition at line 389 of file Data.c.

                                     {
 
  ((ObjectInterface *) clazz->interface)->copy = copy;
  ((ObjectInterface *) clazz->interface)->dealloc = dealloc;
  ((ObjectInterface *) clazz->interface)->hash = hash;
  ((ObjectInterface *) clazz->interface)->isEqual = isEqual;
 
  ((DataInterface *) clazz->interface)->dataWithBytes = dataWithBytes;
  ((DataInterface *) clazz->interface)->dataWithConstMemory = dataWithConstMemory;
  ((DataInterface *) clazz->interface)->dataWithContentsOfFile = dataWithContentsOfFile;
  ((DataInterface *) clazz->interface)->dataWithMemory = dataWithMemory;
  ((DataInterface *) clazz->interface)->initWithBytes = initWithBytes;
  ((DataInterface *) clazz->interface)->initWithConstMemory = initWithConstMemory;
  ((DataInterface *) clazz->interface)->initWithContentsOfFile = initWithContentsOfFile;
  ((DataInterface *) clazz->interface)->initWithMemory = initWithMemory;
  ((DataInterface *) clazz->interface)->appendBytes = appendBytes;
  ((DataInterface *) clazz->interface)->appendData = appendData;
  ((DataInterface *) clazz->interface)->data = data;
  ((DataInterface *) clazz->interface)->dataWithCapacity = dataWithCapacity;
  ((DataInterface *) clazz->interface)->init = init;
  ((DataInterface *) clazz->interface)->initWithCapacity = initWithCapacity;
  ((DataInterface *) clazz->interface)->initWithData = initWithData;
  ((DataInterface *) clazz->interface)->setLength = setLength;
  ((DataInterface *) clazz->interface)->writeToFile = writeToFile;
}

initWithBytes()

static Data * initWithBytes ( Data *  self, const uint8_t *  bytes, size_t  length  )

static

Definition at line 151 of file Data.c.

                                                                            {
 
  ident mem = NULL;
  if (length) {
    mem = malloc(length);
    assert(mem);
 
    memcpy(mem, bytes, length);
  }
 
  return $(self, initWithMemory, mem, length);
}

initWithCapacity()

static Data * initWithCapacity ( Data *  self, size_t  capacity  )

static

Definition at line 313 of file Data.c.

                                                           {
 
  self = (Data *) super(Object, self, init);
  if (self) {
 
    self->capacity = capacity;
    if (self->capacity) {
 
      self->bytes = calloc(capacity, sizeof(uint8_t));
      assert(self->bytes);
    }
 
    self->destroy = free;
  }
 
  return self;
}

initWithConstMemory()

static Data * initWithConstMemory ( Data *  self, const ident  mem, size_t  length  )

static

Definition at line 168 of file Data.c.

                                                                             {
 
  self = (Data *) super(Object, self, init);
  if (self) {
    self->bytes = mem;
    self->length = length;
    self->capacity = length;
  }
 
  return self;
}

initWithContentsOfFile()

static Data * initWithContentsOfFile ( Data *  self, const char *  path  )

static

Definition at line 184 of file Data.c.

                                                                  {
 
  assert(path);
 
  FILE *file = fopen(path, "rb");
  if (file) {
    ident mem = NULL;
 
    int err = fseek(file, 0, SEEK_END);
    assert(err == 0);
 
    const size_t length = ftell(file);
    if (length) {
 
      mem = malloc(length);
      assert(mem);
 
      err = fseek(file, 0, SEEK_SET);
      assert(err == 0);
 
      const size_t read = fread(mem, length, 1, file);
      assert(read == 1);
    }
 
    fclose(file);
    return $(self, initWithMemory, mem, length);
  }
 
  return release(self);
}

initWithData()

static Data * initWithData ( Data *  self, const Data *  data  )

static

Definition at line 335 of file Data.c.

                                                        {
 
  self = $(self, initWithCapacity, data->length);
  if (self) {
    $(self, appendData, data);
  }
 
  return self;
}

initWithMemory()

static Data * initWithMemory ( Data *  self, ident  mem, size_t  length  )

static

Definition at line 219 of file Data.c.

                                                                  {
 
  self = $(self, initWithConstMemory, mem, length);
  if (self) {
    self->destroy = free;
  }
 
  return self;
}

isEqual()

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

static

See also

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

Definition at line 86 of file Data.c.

                                                             {
 
  if (super(Object, self, isEqual, other)) {
    return true;
  }
 
  if (other && $(other, isKindOfClass, _Data())) {
 
    const Data *this = (Data *) self;
    const Data *that = (Data *) other;
 
    if (this->length == that->length) {
      if (this->length == 0) {
        return true;
      }
 
      return memcmp(this->bytes, that->bytes, this->length) == 0;
    }
  }
 
  return false;
}

setLength()

static void setLength ( Data *  self, size_t  length  )

static

Definition at line 349 of file Data.c.

                                                 {
 
  const size_t newCapacity = (length / _pageSize + 1) * _pageSize;
  if (newCapacity > self->capacity) {
 
    if (self->bytes == NULL) {
      self->bytes = calloc(newCapacity, sizeof(uint8_t));
      assert(self->bytes);
    } else {
      if (self->destroy != free) {
        uint8_t *owned = malloc(newCapacity);
        assert(owned);
        memcpy(owned, self->bytes, self->length);
        if (length > self->length) {
          memset(owned + self->length, 0, length - self->length);
        }
        self->bytes = owned;
        self->destroy = free;
      } else {
        self->bytes = realloc(self->bytes, newCapacity);
        assert(self->bytes);
        if (length > self->length) {
          memset(self->bytes + self->length, 0, length - self->length);
        }
      }
    }
 
    self->capacity = newCapacity;
  } else if (length > self->length) {
    memset(self->bytes + self->length, 0, length - self->length);
  }
 
  self->length = length;
}

writeToFile()

static bool writeToFile ( const Data *  self, const char *  path  )

static

Definition at line 233 of file Data.c.

                                                            {
 
  assert(path);
 
  FILE *file = fopen(path, "w");
  if (file) {
 
    size_t count = 1;
 
    if (self->length) {
      count = fwrite(self->bytes, self->length, 1, file);
    }
 
    fclose(file);
 
    if (count == 1) {
      return true;
    }
  }
 
  return false;
}