我有一个小的 asn1 代码：
---------------------ASN1 文件--------------- ---
RectangleModule1 DEFINITIONS ::=
BEGIN
Rectangle ::= SEQUENCE (SIZE(1..10)) OF SEQUENCE {
item CHOICE {
height INTEGER,
width IA5String
} --# UNTAGGED
}
END
当我用 asn1c 编译它时，它给了我 Rectangle.c 和 Rectangle.h 文件。Rectangle 的输出如下所示：
------------------------------------矩形.h------------------------ ------
/* Dependencies */
typedef enum item_PR {
item_PR_NOTHING, /* No components present */
item_PR_height,
item_PR_width
} item_PR;
/* Rectangle */
typedef struct Rectangle {
A_SEQUENCE_OF(struct Member {
struct item {
item_PR present;
union item_u {
long height;
IA5String_t width;
} choice;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} item;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} ) list;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} Rectangle_t;
但我希望我的输出看起来像这样：
/* Dependencies */
typedef enum item_PR_sl {
item_PR_NOTHING_sl, /* No components present */
item_PR_height_sl,
item_PR_width_sl
} item_PR_sl;
/* Rectangle */
typedef struct Rectangle {
A_SEQUENCE_OF(struct Member {
struct item_sl {
item_PR_sl present;
union item_u_sl {
long height;
IA5String_t width;
} choice;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} item;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} ) list;
/* Context for parsing across buffer boundaries */
asn_struct_ctx_t _asn_ctx;
} Rectangle_t;
即， _sl 连接到项目字段。我无法通过更改 asn 文件来做到这一点。我不知道constr_CHOICEandconstr_SEQUENCE是如何工作的。任何帮助，将不胜感激。