ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/cmd/diff/diff.h/
typedef struct Line Line; struct Line { int serial; int value; }; extern Line *file[2]; extern int len[2]; extern long *ixold, *ixnew; extern int *J; extern char mode; extern char bflag; extern char rflag; extern char mflag; extern int anychange; extern Biobuf stdout; extern int binary; #define MAXPATHLEN 1024 int mkpathname(char *, char *, char *); void *emalloc(unsigned); void *erealloc(void *, unsigned); void diff(char *, char *, int); void diffdir(char *, char *, int); void diffreg(char *, char *, char *, char *); Biobuf *prepare(int, char *, char *); void panic(int, char *, ...); void check(Biobuf *, Biobuf *); void change(int, int, int, int); void flushchanges(void);