summaryrefslogtreecommitdiff
path: root/xdiff-interface.c
diff options
context:
space:
mode:
authorRené Scharfe <rene.scharfe@lsrfire.ath.cx>2008-10-25 15:31:15 +0200
committerJunio C Hamano <gitster@pobox.com>2008-10-25 12:09:31 -0700
commit86295bb6bac1482d29650d1f77f19d8e7a7cc2fe (patch)
tree8d64f0afe14423d04da9414a1dbaa809c1f15e3b /xdiff-interface.c
parentef2e62fe23173586f49a00c6ae953ebbdb0d13ab (diff)
downloadgit-86295bb6bac1482d29650d1f77f19d8e7a7cc2fe.tar.gz
add xdi_diff_hunks() for callers that only need hunk lengths
Based on a patch by Brian Downing, this uses the xdiff emit_func feature to implement xdi_diff_hunks(). It's a function that calls a callback for each hunk of a diff, passing its lengths. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'xdiff-interface.c')
-rw-r--r--xdiff-interface.c49
1 files changed, 48 insertions, 1 deletions
diff --git a/xdiff-interface.c b/xdiff-interface.c
index f3f6db3297..70794c71fc 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -1,6 +1,9 @@
#include "cache.h"
#include "xdiff-interface.h"
-#include "strbuf.h"
+#include "xdiff/xtypes.h"
+#include "xdiff/xdiffi.h"
+#include "xdiff/xemit.h"
+#include "xdiff/xmacros.h"
struct xdiff_emit_state {
xdiff_emit_consume_fn consume;
@@ -153,6 +156,50 @@ int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2,
return ret;
}
+struct xdiff_emit_hunk_state {
+ xdiff_emit_hunk_consume_fn consume;
+ void *consume_callback_data;
+};
+
+static int process_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb,
+ xdemitconf_t const *xecfg)
+{
+ long s1, s2, same, p_next, t_next;
+ xdchange_t *xch, *xche;
+ struct xdiff_emit_hunk_state *state = ecb->priv;
+ xdiff_emit_hunk_consume_fn fn = state->consume;
+ void *consume_callback_data = state->consume_callback_data;
+
+ for (xch = xscr; xch; xch = xche->next) {
+ xche = xdl_get_hunk(xch, xecfg);
+
+ s1 = XDL_MAX(xch->i1 - xecfg->ctxlen, 0);
+ s2 = XDL_MAX(xch->i2 - xecfg->ctxlen, 0);
+ same = s2 + XDL_MAX(xch->i1 - s1, 0);
+ p_next = xche->i1 + xche->chg1;
+ t_next = xche->i2 + xche->chg2;
+
+ fn(consume_callback_data, same, p_next, t_next);
+ }
+ return 0;
+}
+
+int xdi_diff_hunks(mmfile_t *mf1, mmfile_t *mf2,
+ xdiff_emit_hunk_consume_fn fn, void *consume_callback_data,
+ xpparam_t const *xpp, xdemitconf_t *xecfg)
+{
+ struct xdiff_emit_hunk_state state;
+ xdemitcb_t ecb;
+
+ memset(&state, 0, sizeof(state));
+ memset(&ecb, 0, sizeof(ecb));
+ state.consume = fn;
+ state.consume_callback_data = consume_callback_data;
+ xecfg->emit_func = (void (*)())process_diff;
+ ecb.priv = &state;
+ return xdi_diff(mf1, mf2, xpp, xecfg, &ecb);
+}
+
int read_mmfile(mmfile_t *ptr, const char *filename)
{
struct stat st;