| Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #ifndef __PJLIB_UTIL_SCANNER_CIS_BIT_H__ |
| 21 | #define __PJLIB_UTIL_SCANNER_CIS_BIT_H__ |
| 22 | |
| 23 | #include <pj/types.h> |
| 24 | |
| 25 | PJ_BEGIN_DECL |
| 26 | |
| 27 | /** |
| 28 | * This describes the type of individual character specification in |
| 29 | * #pj_cis_buf_t. Basicly the number of bits here |
| 30 | */ |
| 31 | #ifndef PJ_CIS_ELEM_TYPE |
| 32 | # define PJ_CIS_ELEM_TYPE pj_uint32_t |
| 33 | #endif |
| 34 | |
| 35 | /** |
| 36 | * This describes the type of individual character specification in |
| 37 | * #pj_cis_buf_t. |
| 38 | */ |
| 39 | typedef PJ_CIS_ELEM_TYPE pj_cis_elem_t; |
| 40 | |
| 41 | /** |
| 42 | * Maximum number of input specification in a buffer. |
| 43 | * Effectively this means the number of bits in pj_cis_elem_t. |
| 44 | */ |
| 45 | #define PJ_CIS_MAX_INDEX (sizeof(pj_cis_elem_t) << 3) |
| 46 | |
| 47 | /** |
| 48 | * The scanner input specification buffer. |
| 49 | */ |
| 50 | typedef struct pj_cis_buf_t |
| 51 | { |
| 52 | pj_cis_elem_t cis_buf[256]; /**< Must be 256 (not 128)! */ |
| 53 | pj_cis_elem_t use_mask; /**< To keep used indexes. */ |
| 54 | } pj_cis_buf_t; |
| 55 | |
| 56 | /** |
| 57 | * Character input specification. |
| 58 | */ |
| 59 | typedef struct pj_cis_t |
| 60 | { |
| 61 | pj_cis_elem_t *cis_buf; /**< Pointer to buffer. */ |
| 62 | int cis_id; /**< Id. */ |
| 63 | } pj_cis_t; |
| 64 | |
| 65 | |
| 66 | /** |
| 67 | * Set the membership of the specified character. |
| 68 | * Note that this is a macro, and arguments may be evaluated more than once. |
| 69 | * |
| 70 | * @param cis Pointer to character input specification. |
| 71 | * @param c The character. |
| 72 | */ |
| 73 | #define PJ_CIS_SET(cis,c) ((cis)->cis_buf[(int)(c)] |= (1 << (cis)->cis_id)) |
| 74 | |
| 75 | /** |
| 76 | * Remove the membership of the specified character. |
| 77 | * Note that this is a macro, and arguments may be evaluated more than once. |
| 78 | * |
| 79 | * @param cis Pointer to character input specification. |
| 80 | * @param c The character to be removed from the membership. |
| 81 | */ |
| 82 | #define PJ_CIS_CLR(cis,c) ((cis)->cis_buf[(int)c] &= ~(1 << (cis)->cis_id)) |
| 83 | |
| 84 | /** |
| 85 | * Check the membership of the specified character. |
| 86 | * Note that this is a macro, and arguments may be evaluated more than once. |
| 87 | * |
| 88 | * @param cis Pointer to character input specification. |
| 89 | * @param c The character. |
| 90 | */ |
| 91 | #define PJ_CIS_ISSET(cis,c) ((cis)->cis_buf[(int)c] & (1 << (cis)->cis_id)) |
| 92 | |
| 93 | |
| 94 | |
| 95 | PJ_END_DECL |
| 96 | |
| 97 | #endif /* __PJLIB_UTIL_SCANNER_CIS_BIT_H__ */ |