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GNU tools for NeXTSTEP 3.3

/*
 * This header file describes the structures of the file format for "fat"
 * architecture specific file (wrapper design).  At the begining of the file
 * there is one fat_header structure followed by a number of fat_arch
 * structures.  For each architecture in the file, specified by a pair of
 * cputype and cpusubtype, the fat_header describes the file offset, file
 * size and alignment in the file of the architecture specific member.
 * The padded bytes in the file to place each member on it's specific alignment
 * are defined to be read as zeros and can be left as "holes" if the file system
 * can support them as long as they read as zeros.
 *
 * All structures defined here are always written and read to/from disk
 * in big-endian order.
 */

/*
 * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
 * and contains the constants for the possible values of these types.
 */
#import <mach/machine.h>
#import <architecture/byte_order.h>

#define FAT_MAGIC	0xcafebabe
#define FAT_CIGAM	NXSwapLong(FAT_MAGIC)

struct fat_header {
	unsigned long	magic;		/* FAT_MAGIC */
	unsigned long	nfat_arch;	/* number of structs that follow */
};

struct fat_arch {
	cpu_type_t	cputype;	/* cpu specifier (int) */
	cpu_subtype_t	cpusubtype;	/* machine specifier (int) */
	unsigned long	offset;		/* file offset to this object file */
	unsigned long	size;		/* size of this object file */
	unsigned long	align;		/* alignment as a power of 2 */
};

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