Merge branch 'jc/diff-algo-cleanup'

Resurrects the preparatory clean-up patches from another topic that was
discarded, as this would give a saner foundation to build on diff.algo
configuration option series.

* jc/diff-algo-cleanup:
  xdiff: PATIENCE/HISTOGRAM are not independent option bits
  xdiff: remove XDL_PATCH_* macros

diff --git a/diff.c b/diff.c
index 377ec1ea4cd90524f7c7525846fc95c3a9e66920..f43b581f41617af61d985fe1f07e99c45f5ebcc5 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -3525,9 +3525,9 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
        else if (!strcmp(arg, "--ignore-space-at-eol"))
                DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL);
        else if (!strcmp(arg, "--patience"))
-               DIFF_XDL_SET(options, PATIENCE_DIFF);
+               options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
        else if (!strcmp(arg, "--histogram"))
-               DIFF_XDL_SET(options, HISTOGRAM_DIFF);
+               options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF);
 
        /* flags options */
        else if (!strcmp(arg, "--binary")) {

diff --git a/diff.h b/diff.h
index cb687436a0ddb9a08fc1a9e9cec569233284e01f..e9e3d44c674a39bb1912ca366ca12512dfb4d2c7 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -91,6 +91,8 @@ typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data)
 #define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
 #define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
 
+#define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
+
 enum diff_words_type {
        DIFF_WORDS_NONE = 0,
        DIFF_WORDS_PORCELAIN,

diff --git a/merge-recursive.c b/merge-recursive.c
index 6479a60cd112c5b06b354b1a251c60bb4bce972a..857f03dc6112ed5bce6b77b7da9535330ea29015 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -2068,9 +2068,9 @@ int parse_merge_opt(struct merge_options *o, const char *s)
        else if (!prefixcmp(s, "subtree="))
                o->subtree_shift = s + strlen("subtree=");
        else if (!strcmp(s, "patience"))
-               o->xdl_opts |= XDF_PATIENCE_DIFF;
+               o->xdl_opts = DIFF_WITH_ALG(o, PATIENCE_DIFF);
        else if (!strcmp(s, "histogram"))
-               o->xdl_opts |= XDF_HISTOGRAM_DIFF;
+               o->xdl_opts = DIFF_WITH_ALG(o, HISTOGRAM_DIFF);
        else if (!strcmp(s, "ignore-space-change"))
                o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
        else if (!strcmp(s, "ignore-all-space"))

diff --git a/xdiff/xdiff.h b/xdiff/xdiff.h
index 00d36c3ac7a7642831d2ffc49647caf77a4d066c..09215afe6e0250fd29897390f074234a7b89f4d8 100644 (file)
--- a/xdiff/xdiff.h
+++ b/xdiff/xdiff.h
@@ -32,14 +32,12 @@ extern "C" {
 #define XDF_IGNORE_WHITESPACE (1 << 2)
 #define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
 #define XDF_IGNORE_WHITESPACE_AT_EOL (1 << 4)
-#define XDF_PATIENCE_DIFF (1 << 5)
-#define XDF_HISTOGRAM_DIFF (1 << 6)
 #define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE | XDF_IGNORE_WHITESPACE_AT_EOL)
 
-#define XDL_PATCH_NORMAL '-'
-#define XDL_PATCH_REVERSE '+'
-#define XDL_PATCH_MODEMASK ((1 << 8) - 1)
-#define XDL_PATCH_IGNOREBSPACE (1 << 8)
+#define XDF_PATIENCE_DIFF (1 << 5)
+#define XDF_HISTOGRAM_DIFF (1 << 6)
+#define XDF_DIFF_ALGORITHM_MASK (XDF_PATIENCE_DIFF | XDF_HISTOGRAM_DIFF)
+#define XDF_DIFF_ALG(x) ((x) & XDF_DIFF_ALGORITHM_MASK)
 
 #define XDL_EMIT_FUNCNAMES (1 << 0)
 #define XDL_EMIT_COMMON (1 << 1)

diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c
index 75a39227501715504cdd12ccc1b4854568a54ad7..bc889e87894fbd261db8aaf29723e8df35f913da 100644 (file)
--- a/xdiff/xdiffi.c
+++ b/xdiff/xdiffi.c
@@ -328,10 +328,10 @@ int xdl_do_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
        xdalgoenv_t xenv;
        diffdata_t dd1, dd2;
 
-       if (xpp->flags & XDF_PATIENCE_DIFF)
+       if (XDF_DIFF_ALG(xpp->flags) == XDF_PATIENCE_DIFF)
                return xdl_do_patience_diff(mf1, mf2, xpp, xe);
 
-       if (xpp->flags & XDF_HISTOGRAM_DIFF)
+       if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
                return xdl_do_histogram_diff(mf1, mf2, xpp, xe);
 
        if (xdl_prepare_env(mf1, mf2, xpp, xe) < 0) {

diff --git a/xdiff/xhistogram.c b/xdiff/xhistogram.c
index 18f6f997c321b5ac1f4d4211a4d448dc8542c22f..bf99787c3e4c791426311495dda9d4da81cbb571 100644 (file)
--- a/xdiff/xhistogram.c
+++ b/xdiff/xhistogram.c
@@ -252,7 +252,7 @@ static int fall_back_to_classic_diff(struct histindex *index,
                int line1, int count1, int line2, int count2)
 {
        xpparam_t xpp;
-       xpp.flags = index->xpp->flags & ~XDF_HISTOGRAM_DIFF;
+       xpp.flags = index->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
 
        return xdl_fall_back_diff(index->env, &xpp,
                                  line1, count1, line2, count2);

diff --git a/xdiff/xpatience.c b/xdiff/xpatience.c
index fdd7d0263f576a8dc1a8e791ef50f8dbe25c7ee5..04e1a1ab2a863814df3b9a91d4e854704d47f3f5 100644 (file)
--- a/xdiff/xpatience.c
+++ b/xdiff/xpatience.c
@@ -288,7 +288,7 @@ static int fall_back_to_classic_diff(struct hashmap *map,
                int line1, int count1, int line2, int count2)
 {
        xpparam_t xpp;
-       xpp.flags = map->xpp->flags & ~XDF_PATIENCE_DIFF;
+       xpp.flags = map->xpp->flags & ~XDF_DIFF_ALGORITHM_MASK;
 
        return xdl_fall_back_diff(map->env, &xpp,
                                  line1, count1, line2, count2);

diff --git a/xdiff/xprepare.c b/xdiff/xprepare.c
index e419f4f726019a5b0365c589285439fb3bfb8db2..63a22c630e521969b08c8ecb1ce9fa3e0f3ff513 100644 (file)
--- a/xdiff/xprepare.c
+++ b/xdiff/xprepare.c
@@ -181,7 +181,7 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
        if (!(recs = (xrecord_t **) xdl_malloc(narec * sizeof(xrecord_t *))))
                goto abort;
 
-       if (xpp->flags & XDF_HISTOGRAM_DIFF)
+       if (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF)
                hbits = hsize = 0;
        else {
                hbits = xdl_hashbits((unsigned int) narec);
@@ -209,8 +209,8 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
                        crec->ha = hav;
                        recs[nrec++] = crec;
 
-                       if (!(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-                               xdl_classify_record(pass, cf, rhash, hbits, crec) < 0)
+                       if ((XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
+                           xdl_classify_record(pass, cf, rhash, hbits, crec) < 0)
                                goto abort;
                }
        }
@@ -273,16 +273,15 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
         * (nrecs) will be updated correctly anyway by
         * xdl_prepare_ctx().
         */
-       sample = xpp->flags & XDF_HISTOGRAM_DIFF ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1;
+       sample = (XDF_DIFF_ALG(xpp->flags) == XDF_HISTOGRAM_DIFF
+                 ? XDL_GUESS_NLINES2 : XDL_GUESS_NLINES1);
 
        enl1 = xdl_guess_lines(mf1, sample) + 1;
        enl2 = xdl_guess_lines(mf2, sample) + 1;
 
-       if (!(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-               xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0) {
-
+       if (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF &&
+           xdl_init_classifier(&cf, enl1 + enl2 + 1, xpp->flags) < 0)
                return -1;
-       }
 
        if (xdl_prepare_ctx(1, mf1, enl1, xpp, &cf, &xe->xdf1) < 0) {
 
@@ -296,9 +295,9 @@ int xdl_prepare_env(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
                return -1;
        }
 
-       if (!(xpp->flags & XDF_PATIENCE_DIFF) &&
-                       !(xpp->flags & XDF_HISTOGRAM_DIFF) &&
-                       xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) {
+       if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) &&
+           (XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF) &&
+           xdl_optimize_ctxs(&cf, &xe->xdf1, &xe->xdf2) < 0) {
 
                xdl_free_ctx(&xe->xdf2);
                xdl_free_ctx(&xe->xdf1);