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#ifdef BSDIFF_SIZET
typedef size_t bsuint;
typedef ssize_t bsint;
#else
typedef unsigned int bsuint;
typedef int bsint;
#endif
struct instr {
bsuint copyout;
bsuint copyin;
bsuint copyinoff;
bsuint copyoutoff;
};
void mkdiff(int mode, unsigned char *old, bsuint oldlen, unsigned char *new, bsuint newlen, struct instr **instrp, int *instrlenp, unsigned char **instrblkp, unsigned int *instrblklenp, unsigned char **addblkp, unsigned int *addblklenp, unsigned char **extrablkp, unsigned int *extrablklenp);
/* step support */
void *mkdiff_step_setup(int mode);
void mkdiff_step(void *sdata, unsigned char *old, bsuint oldlen, unsigned char *new, bsuint newlen, struct instr *instr, bsuint *scanp, bsuint *lastposp, bsuint *lastscanp);
void mkdiff_step_freedata(void *sdata);
void mkdiff_step_free(void *sdata);
#define DELTAMODE_SUF 0
#define DELTAMODE_HASH 1
#define DELTAMODE_NOADDBLK 0x100
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