1 #ifndef XDIFF_INTERFACE_H
2 #define XDIFF_INTERFACE_H
5 #include "xdiff/xdiff.h"
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)
12 #define MAX_XDIFF_SIZE (1024UL * 1024 * 1023)
15 * The `xdiff_emit_line_fn` function can return 1 to abort early, or 0
16 * to continue processing. Note that doing so is an all-or-nothing
17 * affair, as returning 1 will return all the way to the top-level,
18 * e.g. the xdi_diff_outf() call to generate the diff.
20 * Thus returning 1 means you won't be getting any more diff lines. If
21 * you need something in-between those two options you'll to use
22 * `xdl_emit_hunk_consume_func_t` and implement your own version of
25 * We may extend the interface in the future to understand other more
26 * granular return values. While you should return 1 to exit early,
27 * doing so will currently make your early return indistinguishable
28 * from an error internal to xdiff, xdiff itself will see that
29 * non-zero return and translate it to -1.
31 typedef int (*xdiff_emit_line_fn
)(void *, char *, unsigned long);
32 typedef void (*xdiff_emit_hunk_fn
)(void *data
,
33 long old_begin
, long old_nr
,
34 long new_begin
, long new_nr
,
35 const char *func
, long funclen
);
37 int xdi_diff(mmfile_t
*mf1
, mmfile_t
*mf2
, xpparam_t
const *xpp
, xdemitconf_t
const *xecfg
, xdemitcb_t
*ecb
);
38 int xdi_diff_outf(mmfile_t
*mf1
, mmfile_t
*mf2
,
39 xdiff_emit_hunk_fn hunk_fn
,
40 xdiff_emit_line_fn line_fn
,
41 void *consume_callback_data
,
42 xpparam_t
const *xpp
, xdemitconf_t
const *xecfg
);
43 int read_mmfile(mmfile_t
*ptr
, const char *filename
);
44 void read_mmblob(mmfile_t
*ptr
, const struct object_id
*oid
);
45 int buffer_is_binary(const char *ptr
, unsigned long size
);
47 void xdiff_set_find_func(xdemitconf_t
*xecfg
, const char *line
, int cflags
);
48 void xdiff_clear_find_func(xdemitconf_t
*xecfg
);
49 int git_xmerge_config(const char *var
, const char *value
, void *cb
);
50 extern int git_xmerge_style
;
53 * Can be used as a no-op hunk_fn for xdi_diff_outf(), since a NULL
54 * one just sends the hunk line to the line_fn callback).
56 void discard_hunk_line(void *priv
,
57 long ob
, long on
, long nb
, long nn
,
58 const char *func
, long funclen
);
61 * Compare the strings l1 with l2 which are of size s1 and s2 respectively.
62 * Returns 1 if the strings are deemed equal, 0 otherwise.
63 * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
64 * are treated for the comparison.
66 int xdiff_compare_lines(const char *l1
, long s1
,
67 const char *l2
, long s2
, long flags
);
70 * Returns a hash of the string s of length len.
71 * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
72 * are treated for the hash.
74 unsigned long xdiff_hash_string(const char *s
, size_t len
, long flags
);