1 /* Copyright (c) 2014, The Linux Foundation. All rights reserved.
2 *
3 * Redistribution and use in source and binary forms, with or without
4 * modification, are permitted provided that the following conditions are
5 * met:
6 * * Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 * * Redistributions in binary form must reproduce the above
9 * copyright notice, this list of conditions and the following
10 * disclaimer in the documentation and/or other materials provided
11 * with the distribution.
12 * * Neither the name of The Linux Foundation, nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 */
29 #define LOG_NDEBUG 0
30 #define LOG_TAG "LocSvc_misc_utils"
31 #include <stdio.h>
32 #include <string.h>
33 #include <dlfcn.h>
34 #include <log_util.h>
35 #include <loc_misc_utils.h>
36 #include <ctype.h>
37
38
loc_util_split_string(char * raw_string,char ** split_strings_ptr,int max_num_substrings,char delimiter)39 int loc_util_split_string(char *raw_string, char **split_strings_ptr,
40 int max_num_substrings, char delimiter)
41 {
42 int raw_string_index=0;
43 int num_split_strings=0;
44 unsigned char end_string=0;
45 int raw_string_length=0;
46
47 if(!raw_string || !split_strings_ptr) {
48 LOC_LOGE("%s:%d]: NULL parameters", __func__, __LINE__);
49 num_split_strings = -1;
50 goto err;
51 }
52 LOC_LOGD("%s:%d]: raw string: %s\n", __func__, __LINE__, raw_string);
53 raw_string_length = strlen(raw_string) + 1;
54 split_strings_ptr[num_split_strings] = &raw_string[raw_string_index];
55 for(raw_string_index=0; raw_string_index < raw_string_length; raw_string_index++) {
56 if(raw_string[raw_string_index] == '\0')
57 end_string=1;
58 if((raw_string[raw_string_index] == delimiter) || end_string) {
59 raw_string[raw_string_index] = '\0';
60 LOC_LOGD("%s:%d]: split string: %s\n",
61 __func__, __LINE__, split_strings_ptr[num_split_strings]);
62 num_split_strings++;
63 if(((raw_string_index + 1) < raw_string_length) &&
64 (num_split_strings < max_num_substrings)) {
65 split_strings_ptr[num_split_strings] = &raw_string[raw_string_index+1];
66 }
67 else {
68 break;
69 }
70 }
71 if(end_string)
72 break;
73 }
74 err:
75 LOC_LOGD("%s:%d]: num_split_strings: %d\n", __func__, __LINE__, num_split_strings);
76 return num_split_strings;
77 }
78
loc_util_trim_space(char * org_string)79 void loc_util_trim_space(char *org_string)
80 {
81 char *scan_ptr, *write_ptr;
82 char *first_nonspace = NULL, *last_nonspace = NULL;
83
84 if(org_string == NULL) {
85 LOC_LOGE("%s:%d]: NULL parameter", __func__, __LINE__);
86 goto err;
87 }
88
89 scan_ptr = write_ptr = org_string;
90
91 while (*scan_ptr) {
92 //Find the first non-space character
93 if ( !isspace(*scan_ptr) && first_nonspace == NULL) {
94 first_nonspace = scan_ptr;
95 }
96 //Once the first non-space character is found in the
97 //above check, keep shifting the characters to the left
98 //to replace the spaces
99 if (first_nonspace != NULL) {
100 *(write_ptr++) = *scan_ptr;
101 //Keep track of which was the last non-space character
102 //encountered
103 //last_nonspace will not be updated in the case where
104 //the string ends with spaces
105 if ( !isspace(*scan_ptr)) {
106 last_nonspace = write_ptr;
107 }
108 }
109 scan_ptr++;
110 }
111 //Add NULL terminator after the last non-space character
112 if (last_nonspace) { *last_nonspace = '\0'; }
113 err:
114 return;
115 }
116
logDlError(const char * failedCall)117 inline void logDlError(const char* failedCall) {
118 const char * err = dlerror();
119 LOC_LOGe("%s error: %s", failedCall, (nullptr == err) ? "unknown" : err);
120 }
121
dlGetSymFromLib(void * & libHandle,const char * libName,const char * symName)122 void* dlGetSymFromLib(void*& libHandle, const char* libName, const char* symName)
123 {
124 void* sym = nullptr;
125 if ((nullptr != libHandle || nullptr != libName) && nullptr != symName) {
126 if (nullptr == libHandle) {
127 libHandle = dlopen(libName, RTLD_NOW);
128 if (nullptr == libHandle) {
129 logDlError("dlopen");
130 }
131 }
132 // NOT else, as libHandle gets assigned 5 line above
133 if (nullptr != libHandle) {
134 sym = dlsym(libHandle, symName);
135 if (nullptr == sym) {
136 logDlError("dlsym");
137 }
138 }
139 } else {
140 LOC_LOGe("Either libHandle (%p) or libName (%p) must not be null; "
141 "symName (%p) can not be null.", libHandle, libName, symName);
142 }
143
144 return sym;
145 }
146