/security/nss/lib/freebl/mpi/utils/lap.c

http://github.com/zpao/v8monkey · C · 121 lines · 60 code · 20 blank · 41 comment · 6 complexity · 412f6d7c0fe046b12b08dbb5861bff20 MD5 · raw file

  1. /*
  2. * lap.c
  3. *
  4. * Find least annihilating power of a mod m
  5. *
  6. * ***** BEGIN LICENSE BLOCK *****
  7. * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  8. *
  9. * The contents of this file are subject to the Mozilla Public License Version
  10. * 1.1 (the "License"); you may not use this file except in compliance with
  11. * the License. You may obtain a copy of the License at
  12. * http://www.mozilla.org/MPL/
  13. *
  14. * Software distributed under the License is distributed on an "AS IS" basis,
  15. * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  16. * for the specific language governing rights and limitations under the
  17. * License.
  18. *
  19. * The Original Code is the MPI Arbitrary Precision Integer Arithmetic library.
  20. *
  21. * The Initial Developer of the Original Code is
  22. * Michael J. Fromberger.
  23. * Portions created by the Initial Developer are Copyright (C) 1998
  24. * the Initial Developer. All Rights Reserved.
  25. *
  26. * Contributor(s):
  27. *
  28. * Alternatively, the contents of this file may be used under the terms of
  29. * either the GNU General Public License Version 2 or later (the "GPL"), or
  30. * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  31. * in which case the provisions of the GPL or the LGPL are applicable instead
  32. * of those above. If you wish to allow use of your version of this file only
  33. * under the terms of either the GPL or the LGPL, and not to allow others to
  34. * use your version of this file under the terms of the MPL, indicate your
  35. * decision by deleting the provisions above and replace them with the notice
  36. * and other provisions required by the GPL or the LGPL. If you do not delete
  37. * the provisions above, a recipient may use your version of this file under
  38. * the terms of any one of the MPL, the GPL or the LGPL.
  39. *
  40. * ***** END LICENSE BLOCK ***** */
  41. /* $Id: lap.c,v 1.4 2004/04/27 23:04:37 gerv%gerv.net Exp $ */
  42. #include <stdio.h>
  43. #include <stdlib.h>
  44. #include <signal.h>
  45. #include "mpi.h"
  46. void sig_catch(int ign);
  47. int g_quit = 0;
  48. int main(int argc, char *argv[])
  49. {
  50. mp_int a, m, p, k;
  51. if(argc < 3) {
  52. fprintf(stderr, "Usage: %s <a> <m>\n", argv[0]);
  53. return 1;
  54. }
  55. mp_init(&a);
  56. mp_init(&m);
  57. mp_init(&p);
  58. mp_add_d(&p, 1, &p);
  59. mp_read_radix(&a, argv[1], 10);
  60. mp_read_radix(&m, argv[2], 10);
  61. mp_init_copy(&k, &a);
  62. signal(SIGINT, sig_catch);
  63. #ifndef __OS2__
  64. signal(SIGHUP, sig_catch);
  65. #endif
  66. signal(SIGTERM, sig_catch);
  67. while(mp_cmp(&p, &m) < 0) {
  68. if(g_quit) {
  69. int len;
  70. char *buf;
  71. len = mp_radix_size(&p, 10);
  72. buf = malloc(len);
  73. mp_toradix(&p, buf, 10);
  74. fprintf(stderr, "Terminated at: %s\n", buf);
  75. free(buf);
  76. return 1;
  77. }
  78. if(mp_cmp_d(&k, 1) == 0) {
  79. int len;
  80. char *buf;
  81. len = mp_radix_size(&p, 10);
  82. buf = malloc(len);
  83. mp_toradix(&p, buf, 10);
  84. printf("%s\n", buf);
  85. free(buf);
  86. break;
  87. }
  88. mp_mulmod(&k, &a, &m, &k);
  89. mp_add_d(&p, 1, &p);
  90. }
  91. if(mp_cmp(&p, &m) >= 0)
  92. printf("No annihilating power.\n");
  93. mp_clear(&p);
  94. mp_clear(&m);
  95. mp_clear(&a);
  96. return 0;
  97. }
  98. void sig_catch(int ign)
  99. {
  100. g_quit = 1;
  101. }