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xdiff-interface: provide a separate consume callback for hunks

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The previous commit taught xdiff to optionally provide the hunk header
data to a specialized callback. But most users of xdiff actually use our
more convenient xdi_diff_outf() helper, which ensures that our callbacks
are always fed whole lines.

Let's plumb the special hunk-callback through this interface, too. It
will follow the same rule as xdiff when the hunk callback is NULL (i.e.,
continue to pass a stringified hunk header to the line callback). Since
we add NULL to each caller, there should be no behavior change yet.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2018-11-02 02:35:45 -04:00
committed by Junio C Hamano
parent 611e42a598
commit 9346d6d14d
6 changed files with 48 additions and 20 deletions
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10
xdiff-interface.h
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@ -11,11 +11,17 @@
*/
#define MAX_XDIFF_SIZE (1024UL * 1024 * 1023)
typedef void (*xdiff_emit_consume_fn)(void *, char *, unsigned long);
typedef void (*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_consume_fn fn, void *consume_callback_data,
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 parse_hunk_header(char *line, int len,
int *ob, int *on,