combine-diff: refactor built-in xdiff interface.

[git.git] / combine-diff.c

diff --git a/combine-diff.c b/combine-diff.c
index 11f5143..e17afd1 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -4,7 +4,7 @@
 #include "diff.h"
 #include "diffcore.h"
 #include "quote.h"
-#include "xdiff/xdiff.h"
+#include "xdiff-interface.h"
 
 static int uninteresting(struct diff_filepair *p)
 {
@@ -195,8 +195,8 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
 }
 
 struct combine_diff_state {
-       char *remainder;
-       unsigned long remainder_size;
+       struct xdiff_emit_state xm;
+
        unsigned int lno, ob, on, nb, nn;
        unsigned long nmask;
        int num_parent;
@@ -205,10 +205,9 @@ struct combine_diff_state {
        struct sline *lost_bucket;
 };
 
-static void consume_line(struct combine_diff_state *state,
-                        char *line,
-                        unsigned long len)
+static void consume_line(void *state_, char *line, unsigned long len)
 {
+       struct combine_diff_state *state = state_;
        if (5 < len && !memcmp("@@ -", line, 4)) {
                if (parse_hunk_header(line, len,
                                      &state->ob, &state->on,
@@ -249,41 +248,6 @@ static void consume_line(struct combine_diff_state *state,
        }
 }
 
-static int combine_diff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
-{
-       struct combine_diff_state *priv = priv_;
-       int i;
-       for (i = 0; i < nbuf; i++) {
-               if (mb[i].ptr[mb[i].size-1] != '\n') {
-                       /* Incomplete line */
-                       priv->remainder = realloc(priv->remainder,
-                                                 priv->remainder_size +
-                                                 mb[i].size);
-                       memcpy(priv->remainder + priv->remainder_size,
-                              mb[i].ptr, mb[i].size);
-                       priv->remainder_size += mb[i].size;
-                       continue;
-               }
-
-               /* we have a complete line */
-               if (!priv->remainder) {
-                       consume_line(priv, mb[i].ptr, mb[i].size);
-                       continue;
-               }
-               priv->remainder = realloc(priv->remainder,
-                                         priv->remainder_size +
-                                         mb[i].size);
-               memcpy(priv->remainder + priv->remainder_size,
-                      mb[i].ptr, mb[i].size);
-               consume_line(priv, priv->remainder,
-                            priv->remainder_size + mb[i].size);
-               free(priv->remainder);
-               priv->remainder = NULL;
-               priv->remainder_size = 0;
-       }
-       return 0;
-}
-
 static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
                         struct sline *sline, int cnt, int n, int num_parent)
 {
@@ -304,9 +268,10 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
        xpp.flags = XDF_NEED_MINIMAL;
        xecfg.ctxlen = 0;
        xecfg.flags = 0;
-       ecb.outf = combine_diff_outf;
+       ecb.outf = xdiff_outf;
        ecb.priv = &state;
        memset(&state, 0, sizeof(state));
+       state.xm.consume = consume_line;
        state.nmask = nmask;
        state.sline = sline;
        state.lno = 1;
@@ -314,9 +279,6 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
        state.n = n;
 
        xdl_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
-       if (state.remainder && state.remainder_size)
-               consume_line(&state, state.remainder, state.remainder_size);
-       free(state.remainder);
        free(parent_file.ptr);
 
        /* Assign line numbers for this parent.