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1 /*-
2  * Copyright (c) 2003, 2004, 2005 Lev Walkin <vlm@lionet.info>.
3  * All rights reserved.
4  * Redistribution and modifications are permitted subject to BSD license.
5  */
6 /*
7  * Declarations internally useful for the ASN.1 support code.
8  */
9 #ifndef _ASN_INTERNAL_H_
10 #define _ASN_INTERNAL_H_
11
12 #include "asn_application.h"    /* Application-visible API */
13
14 #ifndef __NO_ASSERT_H__         /* Include assert.h only for internal use. */
15 #include <assert.h>             /* for assert() macro */
16 #endif
17
18 #ifdef  __cplusplus
19 extern "C" {
20 #endif
21
22 /* Environment version might be used to avoid running with the old library */
23 #define ASN1C_ENVIRONMENT_VERSION       920     /* Compile-time version */
24 int get_asn1c_environment_version(void);        /* Run-time version */
25
26 #define CALLOC(nmemb, size)     calloc(nmemb, size)
27 #define MALLOC(size)            malloc(size)
28 #define REALLOC(oldptr, size)   realloc(oldptr, size)
29 #define FREEMEM(ptr)            free(ptr)
30
31 /*
32  * A macro for debugging the ASN.1 internals.
33  * You may enable or override it.
34  */
35 #ifndef ASN_DEBUG       /* If debugging code is not defined elsewhere... */
36 #if     EMIT_ASN_DEBUG == 1     /* And it was asked to emit this code... */
37 #ifdef  __GNUC__
38 #define ASN_DEBUG(fmt, args...) do {            \
39                 fprintf(stderr, fmt, ##args);   \
40                 fprintf(stderr, " (%s:%d)\n",   \
41                         __FILE__, __LINE__);    \
42         } while(0)
43 #else   /* !__GNUC__ */
44 void ASN_DEBUG_f(const char *fmt, ...);
45 #define ASN_DEBUG       ASN_DEBUG_f
46 #endif  /* __GNUC__ */
47 #else   /* EMIT_ASN_DEBUG != 1 */
48 static inline void ASN_DEBUG(const char *fmt, ...) { (void)fmt; }
49 #endif  /* EMIT_ASN_DEBUG */
50 #endif  /* ASN_DEBUG */
51
52 /*
53  * Invoke the application-supplied callback and fail, if something is wrong.
54  */
55 #define __ASN_E_cbc(buf, size)  (cb((buf), (size), app_key) < 0)
56 #define _ASN_E_CALLBACK(foo)    do {                                    \
57                 if(foo) goto cb_failed;                                 \
58         } while(0)
59 #define _ASN_CALLBACK(buf, size)                                        \
60         _ASN_E_CALLBACK(__ASN_E_cbc(buf, size))
61 #define _ASN_CALLBACK2(buf1, size1, buf2, size2)                        \
62         _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1) || __ASN_E_cbc(buf2, size2))
63 #define _ASN_CALLBACK3(buf1, size1, buf2, size2, buf3, size3)           \
64         _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1)                        \
65                 || __ASN_E_cbc(buf2, size2)                             \
66                 || __ASN_E_cbc(buf3, size3))
67
68 #define _i_ASN_TEXT_INDENT(nl, level) do {                              \
69         int __level = (level);                                          \
70         int __nl = ((nl) != 0);                                         \
71         int __i;                                                        \
72         if(__nl) _ASN_CALLBACK("\n", 1);                                \
73         for(__i = 0; __i < __level; __i++)                              \
74                 _ASN_CALLBACK("    ", 4);                               \
75         er.encoded += __nl + 4 * __level;                               \
76 } while(0)
77
78 #define _i_INDENT(nl)   do {                                            \
79         int __i;                                                        \
80         if((nl) && cb("\n", 1, app_key) < 0) return -1;                 \
81         for(__i = 0; __i < ilevel; __i++)                               \
82                 if(cb("    ", 4, app_key) < 0) return -1;               \
83 } while(0)
84
85 /*
86  * Check stack against overflow, if limit is set.
87  */
88 #define _ASN_DEFAULT_STACK_MAX  (30000)
89 static inline int
90 _ASN_STACK_OVERFLOW_CHECK(asn_codec_ctx_t *ctx) {
91         if(ctx && ctx->max_stack_size) {
92
93                 /* ctx MUST be allocated on the stack */
94                 ptrdiff_t usedstack = ((char *)ctx - (char *)&ctx);
95                 if(usedstack > 0) usedstack = -usedstack; /* grows up! */
96
97                 /* double negative required to avoid int wrap-around */
98                 if(usedstack < -(ptrdiff_t)ctx->max_stack_size) {
99                         ASN_DEBUG("Stack limit %ld reached",
100                                 (long)ctx->max_stack_size);
101                         return -1;
102                 }
103         }
104         return 0;
105 }
106
107 #ifdef  __cplusplus
108 }
109 #endif
110
111 #endif  /* _ASN_INTERNAL_H_ */