cgms_db.c 4.0 KB

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  1. /**
  2. * Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without modification,
  7. * are permitted provided that the following conditions are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright notice, this
  10. * list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form, except as embedded into a Nordic
  13. * Semiconductor ASA integrated circuit in a product or a software update for
  14. * such product, must reproduce the above copyright notice, this list of
  15. * conditions and the following disclaimer in the documentation and/or other
  16. * materials provided with the distribution.
  17. *
  18. * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
  19. * contributors may be used to endorse or promote products derived from this
  20. * software without specific prior written permission.
  21. *
  22. * 4. This software, with or without modification, must only be used with a
  23. * Nordic Semiconductor ASA integrated circuit.
  24. *
  25. * 5. Any software provided in binary form under this license must not be reverse
  26. * engineered, decompiled, modified and/or disassembled.
  27. *
  28. * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
  29. * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30. * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
  31. * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
  32. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34. * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. *
  39. */
  40. #include <stdbool.h>
  41. #include <stdint.h>
  42. #include "cgms_db.h"
  43. typedef struct
  44. {
  45. bool in_use_flag;
  46. ble_cgms_rec_t record;
  47. } database_entry_t;
  48. static database_entry_t m_database[CGMS_DB_MAX_RECORDS];
  49. static uint8_t m_database_crossref[CGMS_DB_MAX_RECORDS];
  50. static uint16_t m_num_records;
  51. ret_code_t cgms_db_init(void)
  52. {
  53. int i;
  54. for (i = 0; i < CGMS_DB_MAX_RECORDS; i++)
  55. {
  56. m_database[i].in_use_flag = false;
  57. m_database_crossref[i] = 0xFF;
  58. }
  59. m_num_records = 0;
  60. return NRF_SUCCESS;
  61. }
  62. uint16_t cgms_db_num_records_get(void)
  63. {
  64. return m_num_records;
  65. }
  66. ret_code_t cgms_db_record_get(uint8_t record_num, ble_cgms_rec_t * p_rec)
  67. {
  68. if ((record_num >= m_num_records) || (m_num_records == 0))
  69. {
  70. return NRF_ERROR_NOT_FOUND;
  71. }
  72. // copy record to the specified memory
  73. *p_rec = m_database[m_database_crossref[record_num]].record;
  74. return NRF_SUCCESS;
  75. }
  76. ret_code_t cgms_db_record_add(ble_cgms_rec_t * p_rec)
  77. {
  78. int i;
  79. if (m_num_records == CGMS_DB_MAX_RECORDS)
  80. {
  81. return NRF_ERROR_NO_MEM;
  82. }
  83. // find next available database entry
  84. for (i = 0; i < CGMS_DB_MAX_RECORDS; i++)
  85. {
  86. if (!m_database[i].in_use_flag)
  87. {
  88. m_database[i].in_use_flag = true;
  89. m_database[i].record = *p_rec;
  90. m_database_crossref[m_num_records] = i;
  91. m_num_records++;
  92. return NRF_SUCCESS;
  93. }
  94. }
  95. return NRF_ERROR_NO_MEM;
  96. }
  97. ret_code_t cgms_db_record_delete(uint8_t record_num)
  98. {
  99. int i;
  100. if (record_num >= m_num_records)
  101. {
  102. // Deleting a non-existent record is not an error
  103. return NRF_SUCCESS;
  104. }
  105. // free entry
  106. m_database[m_database_crossref[record_num]].in_use_flag = false;
  107. // decrease number of records
  108. m_num_records--;
  109. // remove cross reference index
  110. for (i = record_num; i < m_num_records; i++)
  111. {
  112. m_database_crossref[i] = m_database_crossref[i + 1];
  113. }
  114. return NRF_SUCCESS;
  115. }