1 /* SPDX-License-Identifier: Apache-2.0 OR MIT */
2 /*
3 * Copyright (c) 2015 Rockchip Electronics Co., Ltd.
4 */
5
6 #if defined(__ANDROID__)
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <errno.h>
10 #include "os_env.h"
11 #include <sys/system_properties.h>
12
13 /*
14 * NOTE: __system_property_set only available after android-21
15 * So the library should compiled on latest ndk
16 */
17
os_get_env_u32(const char * name,RK_U32 * value,RK_U32 default_value)18 RK_S32 os_get_env_u32(const char *name, RK_U32 *value, RK_U32 default_value)
19 {
20 char prop[PROP_VALUE_MAX + 1];
21 int len = __system_property_get(name, prop);
22 if (len > 0) {
23 char *endptr;
24 int base = (prop[0] == '0' && prop[1] == 'x') ? (16) : (10);
25 errno = 0;
26 *value = strtoul(prop, &endptr, base);
27 if (errno || (prop == endptr)) {
28 errno = 0;
29 *value = default_value;
30 }
31 } else {
32 *value = default_value;
33 }
34 return 0;
35 }
36
os_get_env_str(const char * name,const char ** value,const char * default_value)37 RK_S32 os_get_env_str(const char *name, const char **value, const char *default_value)
38 {
39 // use unsigned char to avoid warnning
40 static unsigned char env_str[2][PROP_VALUE_MAX + 1];
41 static RK_U32 env_idx = 0;
42 char *prop = (char *)env_str[env_idx];
43 int len = __system_property_get(name, prop);
44 if (len > 0) {
45 *value = prop;
46 env_idx = !env_idx;
47 } else {
48 *value = default_value;
49 }
50 return 0;
51 }
52
os_set_env_u32(const char * name,RK_U32 value)53 RK_S32 os_set_env_u32(const char *name, RK_U32 value)
54 {
55 char buf[PROP_VALUE_MAX + 1 + 2];
56 snprintf(buf, sizeof(buf) - 1, "0x%x", value);
57 int len = __system_property_set(name, buf);
58 return (len) ? (0) : (-1);
59 }
60
os_set_env_str(const char * name,char * value)61 RK_S32 os_set_env_str(const char *name, char *value)
62 {
63 int len = __system_property_set(name, value);
64 return (len) ? (0) : (-1);
65 }
66
67 #endif
68