kc3-lang/SDL/src/libm/s_copysign.c

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• Hash : 0e45984f
  Author :
  Date : 2015-06-21T17:33:46
  

  Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().

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• src/libm/s_copysign.c

• /* @(#)s_copysign.c 5.1 93/09/24 */
  /*
   * ====================================================
   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   *
   * Developed at SunPro, a Sun Microsystems, Inc. business.
   * Permission to use, copy, modify, and distribute this
   * software is freely granted, provided that this notice
   * is preserved.
   * ====================================================
   */
  
  #if defined(LIBM_SCCS) && !defined(lint)
  static const char rcsid[] =
      "$NetBSD: s_copysign.c,v 1.8 1995/05/10 20:46:57 jtc Exp $";
  #endif
  
  /*
   * copysign(double x, double y)
   * copysign(x,y) returns a value with the magnitude of x and
   * with the sign bit of y.
   */
  
  #include "math_libm.h"
  #include "math_private.h"
  
  libm_hidden_proto(copysign)
  #ifdef __STDC__
       double copysign(double x, double y)
  #else
       double copysign(x, y)
       double x, y;
  #endif
  {
      u_int32_t hx, hy;
      GET_HIGH_WORD(hx, x);
      GET_HIGH_WORD(hy, y);
      SET_HIGH_WORD(x, (hx & 0x7fffffff) | (hy & 0x80000000));
      return x;
  }
  
  libm_hidden_def(copysign)
  

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