1/* Private definitions for libsepol. */
2
3/* Endian conversion for reading and writing binary policies */
4
5#include <sepol/policydb/policydb.h>
6
7
8#ifdef __APPLE__
9#include <sys/types.h>
10#include <machine/endian.h>
11#else
12#include <byteswap.h>
13#include <endian.h>
14#endif
15
16#include <errno.h>
17#include <dso.h>
18
19#ifdef __APPLE__
20#define __BYTE_ORDER  BYTE_ORDER
21#define __LITTLE_ENDIAN  LITTLE_ENDIAN
22#endif
23
24#if __BYTE_ORDER == __LITTLE_ENDIAN
25#define cpu_to_le16(x) (x)
26#define le16_to_cpu(x) (x)
27#define cpu_to_le32(x) (x)
28#define le32_to_cpu(x) (x)
29#define cpu_to_le64(x) (x)
30#define le64_to_cpu(x) (x)
31#else
32#define cpu_to_le16(x) bswap_16(x)
33#define le16_to_cpu(x) bswap_16(x)
34#define cpu_to_le32(x) bswap_32(x)
35#define le32_to_cpu(x) bswap_32(x)
36#define cpu_to_le64(x) bswap_64(x)
37#define le64_to_cpu(x) bswap_64(x)
38#endif
39
40#undef min
41#define min(a,b) (((a) < (b)) ? (a) : (b))
42
43#undef max
44#define max(a,b) ((a) >= (b) ? (a) : (b))
45
46#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
47
48#define is_saturated(x) (x == (typeof(x))-1)
49#define zero_or_saturated(x) ((x == 0) || is_saturated(x))
50
51/* Policy compatibility information. */
52struct policydb_compat_info {
53	unsigned int type;
54	unsigned int version;
55	unsigned int sym_num;
56	unsigned int ocon_num;
57	unsigned int target_platform;
58};
59
60extern struct policydb_compat_info *policydb_lookup_compat(unsigned int version,
61							   unsigned int type,
62						unsigned int target_platform);
63
64/* Reading from a policy "file". */
65extern int next_entry(void *buf, struct policy_file *fp, size_t bytes) hidden;
66extern size_t put_entry(const void *ptr, size_t size, size_t n,
67		        struct policy_file *fp) hidden;
68extern int str_read(char **strp, struct policy_file *fp, size_t len) hidden;
69