1#ifndef XDIFF_INTERFACE_H 2#define XDIFF_INTERFACE_H 3 4#include "cache.h" 5#include "xdiff/xdiff.h" 6 7/* 8 * xdiff isn't equipped to handle content over a gigabyte; 9 * we make the cutoff 1GB - 1MB to give some breathing 10 * room for constant-sized additions (e.g., merge markers) 11 */ 12#define MAX_XDIFF_SIZE (1024UL * 1024 * 1023) 13 14typedef void (*xdiff_emit_line_fn)(void *, char *, unsigned long); 15typedef void (*xdiff_emit_hunk_fn)(void *data, 16 long old_begin, long old_nr, 17 long new_begin, long new_nr, 18 const char *func, long funclen); 19 20int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb); 21int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2, 22 xdiff_emit_hunk_fn hunk_fn, 23 xdiff_emit_line_fn line_fn, 24 void *consume_callback_data, 25 xpparam_t const *xpp, xdemitconf_t const *xecfg); 26int parse_hunk_header(char *line, int len, 27 int *ob, int *on, 28 int *nb, int *nn); 29int read_mmfile(mmfile_t *ptr, const char *filename); 30void read_mmblob(mmfile_t *ptr, const struct object_id *oid); 31int buffer_is_binary(const char *ptr, unsigned long size); 32 33extern void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags); 34extern void xdiff_clear_find_func(xdemitconf_t *xecfg); 35extern int git_xmerge_config(const char *var, const char *value, void *cb); 36extern int git_xmerge_style; 37 38/* 39 * Can be used as a no-op hunk_fn for xdi_diff_outf(), since a NULL 40 * one just sends the hunk line to the line_fn callback). 41 */ 42void discard_hunk_line(void *priv, 43 long ob, long on, long nb, long nn, 44 const char *func, long funclen); 45 46/* 47 * Compare the strings l1 with l2 which are of size s1 and s2 respectively. 48 * Returns 1 if the strings are deemed equal, 0 otherwise. 49 * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces 50 * are treated for the comparision. 51 */ 52extern int xdiff_compare_lines(const char *l1, long s1, 53 const char *l2, long s2, long flags); 54 55/* 56 * Returns a hash of the string s of length len. 57 * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces 58 * are treated for the hash. 59 */ 60extern unsigned long xdiff_hash_string(const char *s, size_t len, long flags); 61 62#endif