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/* types.c -- types required to be certain sizes
* Written by Charles Briscoe-Smith; refer to the file LEGAL for details.
*/
/* My appologies to readers for the huge amount of cruft in this file.
I originally wrote it as part of a program to read and print .class
files, and I don't have the will-power to do what needs doing and
throw most of it away... */
/* References are from "The Java Virtual Machine Specification",
describing version 1.0.2 of the JVM. */
/* Forward references */
typedef struct class_file_ class_file;
typedef struct member_info_ member_info;
typedef struct attr_info_ attr_info;
typedef union cp_info_ cp_info;
/* S4: types used in reading the class file */
typedef unsigned char u1;
typedef unsigned short int u2;
typedef unsigned long int u4;
typedef unsigned long long int u8;
typedef signed char s1;
typedef signed short int s2;
typedef signed long int s4;
typedef signed long long int s8;
/* S4.4.4/4.4.5: bit patterns for special float and double values */
typedef union { float f; u4 u; } u4f;
typedef union { double d; u8 u; } u8d;
#define u4float_pinf (0x7f800000UL)
#define u4float_ninf (0xff800000UL)
#define u4float_pnanmin (0x7f800001UL)
#define u4float_pnanmax (0x7fffffffUL)
#define u4float_nnanmin (0xff800001UL)
#define u4float_nnanmax (0xffffffffUL)
#define u4float_pzero (0x00000000UL)
#define u4float_nzero (0x80000000UL)
#define u8double_pinf (0x7ff0000000000000ULL)
#define u8double_ninf (0xfff0000000000000ULL)
#define u8double_pnanmin (0x7ff0000000000001ULL)
#define u8double_pnanmax (0x7fffffffffffffffULL)
#define u8double_nnanmin (0xfff0000000000001ULL)
#define u8double_nnanmax (0xffffffffffffffffULL)
#define u8double_pzero (0x0000000000000000ULL)
#define u8double_nzero (0x8000000000000000ULL)
/* S4.1: The class file */
struct class_file_ {
u2 minor_version;
u2 major_version;
u2 const_count;
cp_info *cp;
u2 access;
u2 this;
u2 super;
u2 iface_count;
u2 *ifaces;
u2 field_count;
member_info *fields;
u2 meth_count;
member_info *meths;
u2 attr_count;
attr_info *attrs;
};
#define MAJOR_VERSION 45
#define MAX_MINOR_VERSION 3
/* S4.4: constant pool */
union cp_info_ {
u2 u2;
struct {
u2 i1, i2;
} u2x2;
u4 u4;
u1 *utf8;
};
#define CONSTANT_Utf8 1 /* u2x1 + utf8 */
#define CONSTANT_Integer 3 /* u4x1 */
#define CONSTANT_Float 4 /* u4x1 */
#define CONSTANT_Long 5 /* u4x2 */
#define CONSTANT_Double 6 /* u4x2 */
#define CONSTANT_Class 7 /* u2x1 */
#define CONSTANT_String 8 /* u2x1 */
#define CONSTANT_Fieldref 9 /* u2x2 */
#define CONSTANT_Methodref 10 /* u2x2 */
#define CONSTANT_InterfaceMethodref 11 /* u2x2 */
#define CONSTANT_NameAndType 12 /* u2x2 */
/* S4.1/4.5/4.6: access flags */
#define ACC_public (0x0001)
#define ACC_private (0x0002)
#define ACC_protected (0x0004)
#define ACC_static (0x0008)
#define ACC_final (0x0010)
#define ACC_super (0x0020) /* in a class */
#define ACC_synchronized (0x0020) /* in a method */
#define ACC_volatile (0x0040)
#define ACC_transient (0x0080)
#define ACC_native (0x0100)
#define ACC_interface (0x0200)
#define ACC_abstract (0x0400)
/* S4.5/4.6: fields/methods */
struct member_info_ {
u2 access;
u2 name;
u2 descr;
u2 attr_count;
attr_info *attrs;
};
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