1 /******************************************************************************
2 *
3 * Copyright 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 ******************************************************************************/
utl_str2int(const char * p_s)43 int16_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 ******************************************************************************/
utl_strucmp(const char * p_s,const char * p_t)79 int 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 ******************************************************************************/
utl_itoa(uint16_t i,char * p_s)113 uint8_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 ******************************************************************************/
utl_set_device_class(tBTA_UTL_COD * p_cod,uint8_t cmd)159 bool 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 ******************************************************************************/
utl_isintstr(const char * p_s)223 bool 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 ******************************************************************************/
utl_isdialchar(const char d)243 bool utl_isdialchar(const char d) {
244 return (((d >= '0') && (d <= '9')) || (d == '*') || (d == '+') ||
245 (d == '#') || (d == ';') || (d == ',') ||
246 ((d >= 'A') && (d <= 'C')) ||
247 ((d == 'p') || (d == 'P') || (d == 'w') || (d == 'W')));
248 }
249
250 /*******************************************************************************
251 *
252 * Function utl_isdialstr
253 *
254 * Description This utility function checks if the given string contains
255 * only dial digits or not
256 *
257 *
258 * Returns true if successful, Otherwise false
259 *
260 ******************************************************************************/
utl_isdialstr(const char * p_s)261 bool utl_isdialstr(const char* p_s) {
262 for (uint16_t i = 0; p_s[i] != 0; i++) {
263 // include chars not in spec that work sent by some headsets.
264 if (!(utl_isdialchar(p_s[i]) || (p_s[i] == '-'))) return false;
265 }
266 return true;
267 }
268