scanner_cis_bitwise.h 2.9 KB

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  1. /*
  2. * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
  3. * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
  4. *
  5. * This program is free software; you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License as published by
  7. * the Free Software Foundation; either version 2 of the License, or
  8. * (at your option) any later version.
  9. *
  10. * This program is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU General Public License
  16. * along with this program; if not, write to the Free Software
  17. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18. */
  19. #ifndef __PJLIB_UTIL_SCANNER_CIS_BIT_H__
  20. #define __PJLIB_UTIL_SCANNER_CIS_BIT_H__
  21. #include <pj/types.h>
  22. PJ_BEGIN_DECL
  23. /**
  24. * This describes the type of individual character specification in
  25. * #pj_cis_buf_t. Basicly the number of bits here
  26. */
  27. #ifndef PJ_CIS_ELEM_TYPE
  28. # define PJ_CIS_ELEM_TYPE pj_uint32_t
  29. #endif
  30. /**
  31. * This describes the type of individual character specification in
  32. * #pj_cis_buf_t.
  33. */
  34. typedef PJ_CIS_ELEM_TYPE pj_cis_elem_t;
  35. /**
  36. * Maximum number of input specification in a buffer.
  37. * Effectively this means the number of bits in pj_cis_elem_t.
  38. */
  39. #define PJ_CIS_MAX_INDEX (sizeof(pj_cis_elem_t) << 3)
  40. /**
  41. * The scanner input specification buffer.
  42. */
  43. typedef struct pj_cis_buf_t
  44. {
  45. pj_cis_elem_t cis_buf[256]; /**< Must be 256 (not 128)! */
  46. pj_cis_elem_t use_mask; /**< To keep used indexes. */
  47. } pj_cis_buf_t;
  48. /**
  49. * Character input specification.
  50. */
  51. typedef struct pj_cis_t
  52. {
  53. pj_cis_elem_t *cis_buf; /**< Pointer to buffer. */
  54. int cis_id; /**< Id. */
  55. } pj_cis_t;
  56. /**
  57. * Set the membership of the specified character.
  58. * Note that this is a macro, and arguments may be evaluated more than once.
  59. *
  60. * @param cis Pointer to character input specification.
  61. * @param c The character.
  62. */
  63. #define PJ_CIS_SET(cis,c) ((cis)->cis_buf[(int)(c)] |= (1 << (cis)->cis_id))
  64. /**
  65. * Remove the membership of the specified character.
  66. * Note that this is a macro, and arguments may be evaluated more than once.
  67. *
  68. * @param cis Pointer to character input specification.
  69. * @param c The character to be removed from the membership.
  70. */
  71. #define PJ_CIS_CLR(cis,c) ((cis)->cis_buf[(int)c] &= ~(1 << (cis)->cis_id))
  72. /**
  73. * Check the membership of the specified character.
  74. * Note that this is a macro, and arguments may be evaluated more than once.
  75. *
  76. * @param cis Pointer to character input specification.
  77. * @param c The character.
  78. */
  79. #define PJ_CIS_ISSET(cis,c) ((cis)->cis_buf[(int)c] & (1 << (cis)->cis_id))
  80. PJ_END_DECL
  81. #endif /* __PJLIB_UTIL_SCANNER_CIS_BIT_H__ */