NumberFormatter.c

Go to the documentation of this file.

/*
 * Objectively: Ultra-lightweight object oriented framework for GNU C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
 
#include "NumberFormatter.h"
 
#define _Class _NumberFormatter
 
#pragma mark - NumberFormatter
 
static NumberFormatter *initWithFormat(NumberFormatter *self, const char *fmt) {
 
  self = (NumberFormatter *) super(Object, self, init);
  if (self) {
    self->fmt = fmt ?: NUMBERFORMAT_DECIMAL;
  }
 
  return self;
}
 
static Number *numberFromString(const NumberFormatter *self, const String *string) {
 
  if (string) {
    double value;
 
    const int res = sscanf(string->chars, self->fmt, &value);
    if (res == 1) {
      return $(alloc(Number), initWithValue, value);
    }
  }
 
  return NULL;
}
 
static String *stringFromNumber(const NumberFormatter *self, const Number *number) {
 
  return $(alloc(String), initWithFormat, self->fmt, number->value);
}
 
#pragma mark - Class lifecycle
 
static void initialize(Class *clazz) {
 
  ((NumberFormatterInterface *) clazz->interface)->numberFromString = numberFromString;
  ((NumberFormatterInterface *) clazz->interface)->initWithFormat = initWithFormat;
  ((NumberFormatterInterface *) clazz->interface)->stringFromNumber = stringFromNumber;
}
 
Class *_NumberFormatter(void) {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "NumberFormatter",
      .superclass = _Object(),
      .instanceSize = sizeof(NumberFormatter),
      .interfaceOffset = offsetof(NumberFormatter, interface),
      .interfaceSize = sizeof(NumberFormatterInterface),
      .initialize = initialize,
    });
  });
 
  return clazz;
}
 
#undef _Class