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Annotation of GNUtools/cctools/include/mach-o/fat.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * This header file describes the structures of the file format for "fat"
                      3:  * architecture specific file (wrapper design).  At the begining of the file
                      4:  * there is one fat_header structure followed by a number of fat_arch
                      5:  * structures.  For each architecture in the file, specified by a pair of
                      6:  * cputype and cpusubtype, the fat_header describes the file offset, file
                      7:  * size and alignment in the file of the architecture specific member.
                      8:  * The padded bytes in the file to place each member on it's specific alignment
                      9:  * are defined to be read as zeros and can be left as "holes" if the file system
                     10:  * can support them as long as they read as zeros.
                     11:  *
                     12:  * All structures defined here are always written and read to/from disk
                     13:  * in big-endian order.
                     14:  */
                     15: 
                     16: /*
                     17:  * <mach/machine.h> is needed here for the cpu_type_t and cpu_subtype_t types
                     18:  * and contains the constants for the possible values of these types.
                     19:  */
                     20: #import <mach/machine.h>
                     21: #import <architecture/byte_order.h>
                     22: 
                     23: #define FAT_MAGIC      0xcafebabe
                     24: #define FAT_CIGAM      NXSwapLong(FAT_MAGIC)
                     25: 
                     26: struct fat_header {
                     27:        unsigned long   magic;          /* FAT_MAGIC */
                     28:        unsigned long   nfat_arch;      /* number of structs that follow */
                     29: };
                     30: 
                     31: struct fat_arch {
                     32:        cpu_type_t      cputype;        /* cpu specifier (int) */
                     33:        cpu_subtype_t   cpusubtype;     /* machine specifier (int) */
                     34:        unsigned long   offset;         /* file offset to this object file */
                     35:        unsigned long   size;           /* size of this object file */
                     36:        unsigned long   align;          /* alignment as a power of 2 */
                     37: };
                     38: 

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