1/******************************************************************************
2 *
3 *  Copyright (C) 2003-2012 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19/******************************************************************************
20 *
21 *  This file contains utility functions.
22 *
23 ******************************************************************************/
24#include <stddef.h>
25
26#include "bt_common.h"
27#include "btm_api.h"
28#include "utl.h"
29
30/*******************************************************************************
31 *
32 * Function         utl_str2int
33 *
34 * Description      This utility function converts a character string to an
35 *                  integer.  Acceptable values in string are 0-9.  If invalid
36 *                  string or string value too large, -1 is returned.  Leading
37 *                  spaces are skipped.
38 *
39 *
40 * Returns          Integer value or -1 on error.
41 *
42 ******************************************************************************/
43int16_t utl_str2int(const char* p_s) {
44  int32_t val = 0;
45
46  for (; *p_s == ' ' && *p_s != 0; p_s++)
47    ;
48
49  if (*p_s == 0) return -1;
50
51  for (;;) {
52    if ((*p_s < '0') || (*p_s > '9')) return -1;
53
54    val += (int32_t)(*p_s++ - '0');
55
56    if (val > 32767) return -1;
57
58    if (*p_s == 0) {
59      return (int16_t)val;
60    } else {
61      val *= 10;
62    }
63  }
64}
65
66/*******************************************************************************
67 *
68 * Function         utl_strucmp
69 *
70 * Description      This utility function compares two strings in uppercase.
71 *                  String p_s must be uppercase.  String p_t is converted to
72 *                  uppercase if lowercase.  If p_s ends first, the substring
73 *                  match is counted as a match.
74 *
75 *
76 * Returns          0 if strings match, nonzero otherwise.
77 *
78 ******************************************************************************/
79int utl_strucmp(const char* p_s, const char* p_t) {
80  char c;
81
82  while (*p_s && *p_t) {
83    c = *p_t++;
84    if (c >= 'a' && c <= 'z') {
85      c -= 0x20;
86    }
87    if (*p_s++ != c) {
88      return -1;
89    }
90  }
91  /* if p_t hit null first, no match */
92  if (*p_t == 0 && *p_s != 0) {
93    return 1;
94  }
95  /* else p_s hit null first, count as match */
96  else {
97    return 0;
98  }
99}
100
101/*******************************************************************************
102 *
103 * Function         utl_itoa
104 *
105 * Description      This utility function converts a uint16_t to a string.  The
106 *                  string is NULL-terminated.  The length of the string is
107 *                  returned;
108 *
109 *
110 * Returns          Length of string.
111 *
112 ******************************************************************************/
113uint8_t utl_itoa(uint16_t i, char* p_s) {
114  uint16_t j, k;
115  char* p = p_s;
116  bool fill = false;
117
118  if (i == 0) {
119    /* take care of zero case */
120    *p++ = '0';
121  } else {
122    for (j = 10000; j > 0; j /= 10) {
123      k = i / j;
124      i %= j;
125      if (k > 0 || fill) {
126        *p++ = k + '0';
127        fill = true;
128      }
129    }
130  }
131  *p = 0;
132  return (uint8_t)(p - p_s);
133}
134
135/*******************************************************************************
136 *
137 * Function         utl_set_device_class
138 *
139 * Description      This function updates the local Device Class.
140 *
141 * Parameters:
142 *                  p_cod   - Pointer to the device class to set to
143 *
144 *                  cmd     - the fields of the device class to update.
145 *                            BTA_UTL_SET_COD_MAJOR_MINOR, - overwrite major,
146 *                                                           minor class
147 *                            BTA_UTL_SET_COD_SERVICE_CLASS - set the bits in
148 *                                                            the input
149 *                            BTA_UTL_CLR_COD_SERVICE_CLASS - clear the bits in
150 *                                                            the input
151 *                            BTA_UTL_SET_COD_ALL - overwrite major, minor, set
152 *                                                  the bits in service class
153 *                            BTA_UTL_INIT_COD - overwrite major, minor, and
154 *                                               service class
155 *
156 * Returns          true if successful, Otherwise false
157 *
158 ******************************************************************************/
159bool utl_set_device_class(tBTA_UTL_COD* p_cod, uint8_t cmd) {
160  uint8_t* dev;
161  uint16_t service;
162  uint8_t minor, major;
163  DEV_CLASS dev_class;
164
165  dev = BTM_ReadDeviceClass();
166  BTM_COD_SERVICE_CLASS(service, dev);
167  BTM_COD_MINOR_CLASS(minor, dev);
168  BTM_COD_MAJOR_CLASS(major, dev);
169
170  switch (cmd) {
171    case BTA_UTL_SET_COD_MAJOR_MINOR:
172      minor = p_cod->minor & BTM_COD_MINOR_CLASS_MASK;
173      major = p_cod->major & BTM_COD_MAJOR_CLASS_MASK;
174      break;
175
176    case BTA_UTL_SET_COD_SERVICE_CLASS:
177      /* clear out the bits that is not SERVICE_CLASS bits */
178      p_cod->service &= BTM_COD_SERVICE_CLASS_MASK;
179      service = service | p_cod->service;
180      break;
181
182    case BTA_UTL_CLR_COD_SERVICE_CLASS:
183      p_cod->service &= BTM_COD_SERVICE_CLASS_MASK;
184      service = service & (~p_cod->service);
185      break;
186
187    case BTA_UTL_SET_COD_ALL:
188      minor = p_cod->minor & BTM_COD_MINOR_CLASS_MASK;
189      major = p_cod->major & BTM_COD_MAJOR_CLASS_MASK;
190      p_cod->service &= BTM_COD_SERVICE_CLASS_MASK;
191      service = service | p_cod->service;
192      break;
193
194    case BTA_UTL_INIT_COD:
195      minor = p_cod->minor & BTM_COD_MINOR_CLASS_MASK;
196      major = p_cod->major & BTM_COD_MAJOR_CLASS_MASK;
197      service = p_cod->service & BTM_COD_SERVICE_CLASS_MASK;
198      break;
199
200    default:
201      return false;
202  }
203
204  /* convert the fields into the device class type */
205  FIELDS_TO_COD(dev_class, minor, major, service);
206
207  if (BTM_SetDeviceClass(dev_class) == BTM_SUCCESS) return true;
208
209  return false;
210}
211
212/*******************************************************************************
213 *
214 * Function         utl_isintstr
215 *
216 * Description      This utility function checks if the given string is an
217 *                  integer string or not
218 *
219 *
220 * Returns          true if successful, Otherwise false
221 *
222 ******************************************************************************/
223bool utl_isintstr(const char* p_s) {
224  uint16_t i = 0;
225
226  for (i = 0; p_s[i] != 0; i++) {
227    if (((p_s[i] < '0') || (p_s[i] > '9')) && (p_s[i] != ';')) return false;
228  }
229
230  return true;
231}
232
233/*******************************************************************************
234 *
235 * Function         utl_isdialchar
236 *
237 * Description      This utility function checks if the given character
238 *                  is an acceptable dial digit
239 *
240 * Returns          true if successful, Otherwise false
241 *
242 ******************************************************************************/
243bool utl_isdialchar(const char d) {
244  return (((d >= '0') && (d <= '9')) || (d == '*') || (d == '+') ||
245          (d == '#') || (d == ';') || ((d >= 'A') && (d <= 'C')) ||
246          ((d == 'p') || (d == 'P') || (d == 'w') || (d == 'W')));
247}
248
249/*******************************************************************************
250 *
251 * Function         utl_isdialstr
252 *
253 * Description      This utility function checks if the given string contains
254 *                  only dial digits or not
255 *
256 *
257 * Returns          true if successful, Otherwise false
258 *
259 ******************************************************************************/
260bool utl_isdialstr(const char* p_s) {
261  for (uint16_t i = 0; p_s[i] != 0; i++) {
262    // include chars not in spec that work sent by some headsets.
263    if (!(utl_isdialchar(p_s[i]) || (p_s[i] == '-'))) return false;
264  }
265  return true;
266}
267