classfile的数据结构

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typedef enum ClassFileType{
CP_NULLCLASS= -1,
CP_INVALID=0,
CP_ZIPFILE=1,
CP_DIR=2,
CP_SOFILE=3,
CP_BYTEARRAY=4
} ClassFileType;

typedef ClassFileType classFile{
    unsigned char        *mem; //
const unsigned char *base; //
const unsigned char *cur; // current position
size_t               size; //
ClassFileType        type; // ½á¹¹Ìå
}classFile; //define classFile

// function declaration
extern void classFileInit(
        classFile *cf,
                          unsigned char *mem,
        const unsigned char *buf,
                          size_t len,
        ClassFileType cft
        );
extern bool checkBufSize(
       classFile *cf,
                         u4 need,
                         const char *cfname,
       errorInfo *einfo
       );
extern void readu1(u1 *c, classFile *cf);
extern void readu2(u2 *c, classFile *cf);
extern void readu4(u4 *c, classFile *cf);
extern void seekm(classFile *cf, size_t len);//