simple euristic for further free packing improvements
[gitweb.git] / combine-diff.c
index 9bd27f82ec1d7c313987325a4948a5eed8c9b799..8a8fe3863a002ea6b62a760d5413dfe0fd0ffde7 100644 (file)
@@ -5,6 +5,7 @@
 #include "diffcore.h"
 #include "quote.h"
 #include "xdiff-interface.h"
+#include "log-tree.h"
 
 static int uninteresting(struct diff_filepair *p)
 {
@@ -584,12 +585,22 @@ static void reuse_combine_diff(struct sline *sline, unsigned long cnt,
        sline->p_lno[i] = sline->p_lno[j];
 }
 
+static void dump_quoted_path(const char *prefix, const char *path)
+{
+       fputs(prefix, stdout);
+       if (quote_c_style(path, NULL, NULL, 0))
+               quote_c_style(path, NULL, stdout, 0);
+       else
+               printf("%s", path);
+       putchar('\n');
+}
+
 static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
-                          int dense, const char *header,
-                          struct diff_options *opt)
+                          int dense, struct rev_info *rev)
 {
+       struct diff_options *opt = &rev->diffopt;
        unsigned long result_size, cnt, lno;
-       char *result, *cp, *ep;
+       char *result, *cp;
        struct sline *sline; /* survived lines */
        int mode_differs = 0;
        int i, show_hunks, shown_header = 0;
@@ -641,7 +652,6 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
                cnt++; /* incomplete line */
 
        sline = xcalloc(cnt+2, sizeof(*sline));
-       ep = result;
        sline[0].bol = result;
        for (lno = 0; lno <= cnt + 1; lno++) {
                sline[lno].lost_tail = &sline[lno].lost_head;
@@ -689,16 +699,9 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
        if (show_hunks || mode_differs || working_tree_file) {
                const char *abb;
 
-               if (header) {
-                       shown_header++;
-                       printf("%s%c", header, opt->line_termination);
-               }
-               printf("diff --%s ", dense ? "cc" : "combined");
-               if (quote_c_style(elem->path, NULL, NULL, 0))
-                       quote_c_style(elem->path, NULL, stdout, 0);
-               else
-                       printf("%s", elem->path);
-               putchar('\n');
+               if (rev->loginfo)
+                       show_log(rev, rev->loginfo, "\n");
+               dump_quoted_path(dense ? "diff --cc " : "diff --combined ", elem->path);
                printf("index ");
                for (i = 0; i < num_parent; i++) {
                        abb = find_unique_abbrev(elem->parent[i].sha1,
@@ -729,6 +732,8 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
                        }
                        putchar('\n');
                }
+               dump_quoted_path("--- a/", elem->path);
+               dump_quoted_path("+++ b/", elem->path);
                dump_sline(sline, cnt, num_parent);
        }
        free(result);
@@ -750,9 +755,10 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 
 #define COLONS "::::::::::::::::::::::::::::::::"
 
-static void show_raw_diff(struct combine_diff_path *p, int num_parent, const char *header, struct diff_options *opt)
+static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct rev_info *rev)
 {
-       int i, offset, mod_type = 'A';
+       struct diff_options *opt = &rev->diffopt;
+       int i, offset;
        const char *prefix;
        int line_termination, inter_name_termination;
 
@@ -761,15 +767,8 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, const cha
        if (!line_termination)
                inter_name_termination = 0;
 
-       if (header)
-               printf("%s%c", header, line_termination);
-
-       for (i = 0; i < num_parent; i++) {
-               if (p->parent[i].mode)
-                       mod_type = 'M';
-       }
-       if (!p->mode)
-               mod_type = 'D';
+       if (rev->loginfo)
+               show_log(rev, rev->loginfo, "\n");
 
        if (opt->output_format == DIFF_FORMAT_RAW) {
                offset = strlen(COLONS) - num_parent;
@@ -810,58 +809,66 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, const cha
        }
 }
 
-int show_combined_diff(struct combine_diff_path *p,
+void show_combined_diff(struct combine_diff_path *p,
                       int num_parent,
                       int dense,
-                      const char *header,
-                      struct diff_options *opt)
+                      struct rev_info *rev)
 {
+       struct diff_options *opt = &rev->diffopt;
        if (!p->len)
-               return 0;
+               return;
        switch (opt->output_format) {
        case DIFF_FORMAT_RAW:
        case DIFF_FORMAT_NAME_STATUS:
        case DIFF_FORMAT_NAME:
-               show_raw_diff(p, num_parent, header, opt);
-               return 1;
-
-       default:
+               show_raw_diff(p, num_parent, rev);
+               return;
        case DIFF_FORMAT_PATCH:
-               return show_patch_diff(p, num_parent, dense, header, opt);
+               show_patch_diff(p, num_parent, dense, rev);
+               return;
+       default:
+               return;
        }
 }
 
-const char *diff_tree_combined_merge(const unsigned char *sha1,
-                            const char *header, int dense,
-                            struct diff_options *opt)
+void diff_tree_combined(const unsigned char *sha1,
+                       const unsigned char parent[][20],
+                       int num_parent,
+                       int dense,
+                       struct rev_info *rev)
 {
-       struct commit *commit = lookup_commit(sha1);
+       struct diff_options *opt = &rev->diffopt;
        struct diff_options diffopts;
-       struct commit_list *parents;
        struct combine_diff_path *p, *paths = NULL;
-       int num_parent, i, num_paths;
+       int i, num_paths;
+       int do_diffstat;
 
+       do_diffstat = (opt->output_format == DIFF_FORMAT_DIFFSTAT ||
+                      opt->with_stat);
        diffopts = *opt;
-       diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
        diffopts.with_raw = 0;
+       diffopts.with_stat = 0;
        diffopts.recursive = 1;
 
-       /* count parents */
-       for (parents = commit->parents, num_parent = 0;
-            parents;
-            parents = parents->next, num_parent++)
-               ; /* nothing */
-
        /* find set of paths that everybody touches */
-       for (parents = commit->parents, i = 0;
-            parents;
-            parents = parents->next, i++) {
-               struct commit *parent = parents->item;
-               diff_tree_sha1(parent->object.sha1, commit->object.sha1, "",
-                              &diffopts);
+       for (i = 0; i < num_parent; i++) {
+               /* show stat against the first parent even
+                * when doing combined diff.
+                */
+               if (i == 0 && do_diffstat)
+                       diffopts.output_format = DIFF_FORMAT_DIFFSTAT;
+               else
+                       diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
+               diff_tree_sha1(parent[i], sha1, "", &diffopts);
                diffcore_std(&diffopts);
                paths = intersect_paths(paths, i, num_parent);
+
+               if (do_diffstat && rev->loginfo)
+                       show_log(rev, rev->loginfo,
+                                opt->with_stat ? "---\n" : "\n");
                diff_flush(&diffopts);
+               if (opt->with_stat)
+                       putchar('\n');
        }
 
        /* find out surviving paths */
@@ -874,17 +881,13 @@ const char *diff_tree_combined_merge(const unsigned char *sha1,
                        int saved_format = opt->output_format;
                        opt->output_format = DIFF_FORMAT_RAW;
                        for (p = paths; p; p = p->next) {
-                               if (show_combined_diff(p, num_parent, dense,
-                                                      header, opt))
-                                       header = NULL;
+                               show_combined_diff(p, num_parent, dense, rev);
                        }
                        opt->output_format = saved_format;
                        putchar(opt->line_termination);
                }
                for (p = paths; p; p = p->next) {
-                       if (show_combined_diff(p, num_parent, dense,
-                                              header, opt))
-                               header = NULL;
+                       show_combined_diff(p, num_parent, dense, rev);
                }
        }
 
@@ -894,5 +897,26 @@ const char *diff_tree_combined_merge(const unsigned char *sha1,
                paths = paths->next;
                free(tmp);
        }
-       return header;
+}
+
+void diff_tree_combined_merge(const unsigned char *sha1,
+                            int dense, struct rev_info *rev)
+{
+       int num_parent;
+       const unsigned char (*parent)[20];
+       struct commit *commit = lookup_commit(sha1);
+       struct commit_list *parents;
+
+       /* count parents */
+       for (parents = commit->parents, num_parent = 0;
+            parents;
+            parents = parents->next, num_parent++)
+               ; /* nothing */
+
+       parent = xmalloc(num_parent * sizeof(*parent));
+       for (parents = commit->parents, num_parent = 0;
+            parents;
+            parents = parents->next, num_parent++)
+               memcpy(parent + num_parent, parents->item->object.sha1, 20);
+       diff_tree_combined(sha1, parent, num_parent, dense, rev);
 }