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#ifndef XDIFF_INTERFACE_H
#define XDIFF_INTERFACE_H
#include "cache.h"
#include "xdiff/xdiff.h"
/*
* xdiff isn't equipped to handle content over a gigabyte;
* we make the cutoff 1GB - 1MB to give some breathing
* room for constant-sized additions (e.g., merge markers)
*/
#define MAX_XDIFF_SIZE (1024UL * 1024 * 1023)
/**
* The `xdiff_emit_line_fn` function can return 1 to abort early, or 0
* to continue processing. Note that doing so is an all-or-nothing
* affair, as returning 1 will return all the way to the top-level,
* e.g. the xdi_diff_outf() call to generate the diff.
*
* Thus returning 1 means you won't be getting any more diff lines. If
* you need something in-between those two options you'll to use
* `xdl_emit_hunk_consume_func_t` and implement your own version of
* xdl_emit_diff().
*
* We may extend the interface in the future to understand other more
* granular return values. While you should return 1 to exit early,
* doing so will currently make your early return indistinguishable
* from an error internal to xdiff, xdiff itself will see that
* non-zero return and translate it to -1.
*
* See "diff_grep" in diffcore-pickaxe.c for a trick to work around
* this, i.e. using the "consume_callback_data" to note the desired
* early return.
*/
typedef int (*xdiff_emit_line_fn)(void *, char *, unsigned long);
typedef void (*xdiff_emit_hunk_fn)(void *data,
long old_begin, long old_nr,
long new_begin, long new_nr,
const char *func, long funclen);
int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb);
int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2,
xdiff_emit_hunk_fn hunk_fn,
xdiff_emit_line_fn line_fn,
void *consume_callback_data,
xpparam_t const *xpp, xdemitconf_t const *xecfg);
int read_mmfile(mmfile_t *ptr, const char *filename);
void read_mmblob(mmfile_t *ptr, const struct object_id *oid);
int buffer_is_binary(const char *ptr, unsigned long size);
void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags);
void xdiff_clear_find_func(xdemitconf_t *xecfg);
int git_xmerge_config(const char *var, const char *value, void *cb);
extern int git_xmerge_style;
/*
* Compare the strings l1 with l2 which are of size s1 and s2 respectively.
* Returns 1 if the strings are deemed equal, 0 otherwise.
* The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
* are treated for the comparison.
*/
int xdiff_compare_lines(const char *l1, long s1,
const char *l2, long s2, long flags);
/*
* Returns a hash of the string s of length len.
* The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
* are treated for the hash.
*/
unsigned long xdiff_hash_string(const char *s, size_t len, long flags);
#endif
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