c3-lang/libtommath/bn_mp_init_multi.c

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• Hash : 4e3f1344
  Author :
  Date : 2015-11-12T01:49:07
  

  provide tommath_private.h tommath.h contains declarations for the public part of the library. tommath_private.h contains the functions which are private to ltm and should not be exposed to the public.

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• bn_mp_init_multi.c

• #include <tommath_private.h>
  #ifdef BN_MP_INIT_MULTI_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis
   *
   * LibTomMath is a library that provides multiple-precision
   * integer arithmetic as well as number theoretic functionality.
   *
   * The library was designed directly after the MPI library by
   * Michael Fromberger but has been written from scratch with
   * additional optimizations in place.
   *
   * The library is free for all purposes without any express
   * guarantee it works.
   *
   * Tom St Denis, tstdenis82@gmail.com, http://libtom.org
   */
  #include <stdarg.h>
  
  int mp_init_multi(mp_int *mp, ...) 
  {
      mp_err res = MP_OKAY;      /* Assume ok until proven otherwise */
      int n = 0;                 /* Number of ok inits */
      mp_int* cur_arg = mp;
      va_list args;
  
      va_start(args, mp);        /* init args to next argument from caller */
      while (cur_arg != NULL) {
          if (mp_init(cur_arg) != MP_OKAY) {
              /* Oops - error! Back-track and mp_clear what we already
                 succeeded in init-ing, then return error.
              */
              va_list clean_args;
              
              /* end the current list */
              va_end(args);
              
              /* now start cleaning up */            
              cur_arg = mp;
              va_start(clean_args, mp);
              while (n-- != 0) {
                  mp_clear(cur_arg);
                  cur_arg = va_arg(clean_args, mp_int*);
              }
              va_end(clean_args);
              res = MP_MEM;
              break;
          }
          n++;
          cur_arg = va_arg(args, mp_int*);
      }
      va_end(args);
      return res;                /* Assumed ok, if error flagged above. */
  }
  
  #endif
  
  /* $Source$ */
  /* $Revision$ */
  /* $Date$ */
  

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