9 files changed, 68 insertions, 17 deletions

diff --git a/cgit.c b/cgit.c
index b7807ad..1d50129 100644
--- a/cgit.c
+++ b/cgit.c
@@ -298,6 +298,7 @@ static void querystring_cb(const char *name, const char *value)
                 ctx.qry.period = xstrdup(value);
         } else if (!strcmp(name, "ss")) {
                 ctx.qry.ssdiff = atoi(value);
+                ctx.qry.has_ssdiff = 1;
         } else if (!strcmp(name, "all")) {
                 ctx.qry.show_all = atoi(value);
         } else if (!strcmp(name, "context")) {
diff --git a/cgit.h b/cgit.h
index bad66f0..c7ab5c6 100644
--- a/cgit.h
+++ b/cgit.h
@@ -137,6 +137,7 @@ struct reflist {
 struct cgit_query {
         int has_symref;
         int has_sha1;
+        int has_ssdiff;
         char *raw;
         char *repo;
         char *page;
diff --git a/ui-diff.c b/ui-diff.c
index d97a801..af24a6c 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -395,8 +395,7 @@ void cgit_print_diff(const char *new_rev, const char *old_rev,
                 }
         }
 
-        if ((ctx.qry.ssdiff && !ctx.cfg.ssdiff) || (!ctx.qry.ssdiff && ctx.cfg.ssdiff))
-                use_ssdiff = 1;
+        use_ssdiff = ctx.qry.has_ssdiff ? ctx.qry.ssdiff : ctx.cfg.ssdiff;
 
         if (show_ctrls)
                 cgit_print_diff_ctrls();
diff --git a/ui-log.c b/ui-log.c
index 4a295bd..6b12ca2 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -76,6 +76,8 @@ void show_commit_decorations(struct commit *commit)
                         cgit_tag_link(buf, NULL, "tag-deco", ctx.qry.head, buf);
                 }
                 else if (!prefixcmp(deco->name, "refs/remotes/")) {
+                        if (!ctx.repo->enable_remote_branches)
+                                goto next;
                         strncpy(buf, deco->name + 13, sizeof(buf) - 1);
                         cgit_log_link(buf, NULL, "remote-deco", NULL,
                                       sha1_to_hex(commit->object.sha1),
@@ -88,6 +90,7 @@ void show_commit_decorations(struct commit *commit)
                                          sha1_to_hex(commit->object.sha1),
                                          ctx.qry.vpath, 0);
                 }
+next:
                 deco = deco->next;
         }
 }
diff --git a/ui-repolist.c b/ui-repolist.c
index 25c36ce..a09a689 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -118,13 +118,13 @@ void print_header(int columns)
 }
 
 
-void print_pager(int items, int pagelen, char *search)
+void print_pager(int items, int pagelen, char *search, char *sort)
 {
         int i;
         html("<div class='pager'>");
         for(i = 0; i * pagelen < items; i++)
                 cgit_index_link(fmt("[%d]", i+1), fmt("Page %d", i+1), NULL,
-                                search, i * pagelen);
+                                search, sort, i * pagelen);
         html("</div>");
 }
 
@@ -291,7 +291,7 @@ void cgit_print_repolist()
         if (!hits)
                 cgit_print_error("No repositories found");
         else if (hits > ctx.cfg.max_repo_count)
-                print_pager(hits, ctx.cfg.max_repo_count, ctx.qry.search);
+                print_pager(hits, ctx.cfg.max_repo_count, ctx.qry.search, ctx.qry.sort);
         cgit_print_docend();
 }
 
diff --git a/ui-shared.c b/ui-shared.c
index 5aa9119..85c2096 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -133,7 +133,7 @@ char *cgit_currurl()
                 return fmt("%s/", ctx.cfg.virtual_root);
 }
 
-static void site_url(const char *page, const char *search, int ofs)
+static void site_url(const char *page, const char *search, const char *sort, int ofs)
 {
         char *delim = "?";
 
@@ -154,6 +154,12 @@ static void site_url(const char *page, const char *search, int ofs)
                 html_attr(search);
                 delim = "&";
         }
+        if (sort) {
+                html(delim);
+                html("s=");
+                html_attr(sort);
+                delim = "&";
+        }
         if (ofs) {
                 html(delim);
                 htmlf("ofs=%d", ofs);
@@ -161,7 +167,7 @@ static void site_url(const char *page, const char *search, int ofs)
 }
 
 static void site_link(const char *page, const char *name, const char *title,
-                      const char *class, const char *search, int ofs)
+                      const char *class, const char *search, const char *sort, int ofs)
 {
         html("<a");
         if (title) {
@@ -175,16 +181,16 @@ static void site_link(const char *page, const char *name, const char *title,
                 html("'");
         }
         html(" href='");
-        site_url(page, search, ofs);
+        site_url(page, search, sort, ofs);
         html("'>");
         html_txt(name);
         html("</a>");
 }
 
 void cgit_index_link(const char *name, const char *title, const char *class,
-                     const char *pattern, int ofs)
+                     const char *pattern, const char *sort, int ofs)
 {
-        site_link(NULL, name, title, class, pattern, ofs);
+        site_link(NULL, name, title, class, pattern, sort, ofs);
 }
 
 static char *repolink(const char *title, const char *class, const char *page,
@@ -428,7 +434,7 @@ void cgit_self_link(char *name, const char *title, const char *class,
                     struct cgit_context *ctx)
 {
         if (!strcmp(ctx->qry.page, "repolist"))
-                return cgit_index_link(name, title, class, ctx->qry.search,
+                return cgit_index_link(name, title, class, ctx->qry.search, ctx->qry.sort,
                                        ctx->qry.ofs);
         else if (!strcmp(ctx->qry.page, "summary"))
                 return cgit_summary_link(name, title, class, ctx->qry.head);
@@ -782,7 +788,7 @@ static void print_header(struct cgit_context *ctx)
 
         html("<td class='main'>");
         if (ctx->repo) {
-                cgit_index_link("index", NULL, NULL, NULL, 0);
+                cgit_index_link("index", NULL, NULL, NULL, NULL, 0);
                 html(" : ");
                 cgit_summary_link(ctx->repo->name, ctx->repo->name, NULL, NULL);
                 html("</td><td class='form'>");
@@ -858,10 +864,10 @@ void cgit_print_pageheader(struct cgit_context *ctx)
                 html("<input type='submit' value='search'/>\n");
                 html("</form>\n");
         } else {
-                site_link(NULL, "index", NULL, hc(ctx, "repolist"), NULL, 0);
+                site_link(NULL, "index", NULL, hc(ctx, "repolist"), NULL, NULL, 0);
                 if (ctx->cfg.root_readme)
                         site_link("about", "about", NULL, hc(ctx, "about"),
-                                  NULL, 0);
+                                  NULL, NULL, 0);
                 html("</td><td class='form'>");
                 html("<form method='get' action='");
                 html_attr(cgit_rooturl());
diff --git a/ui-shared.h b/ui-shared.h
index 3cc1258..865bd45 100644
--- a/ui-shared.h
+++ b/ui-shared.h
@@ -11,7 +11,7 @@ extern char *cgit_pageurl(const char *reponame, const char *pagename,
                           const char *query);
 
 extern void cgit_index_link(const char *name, const char *title,
-                            const char *class, const char *pattern, int ofs);
+                            const char *class, const char *pattern, const char *sort, int ofs);
 extern void cgit_summary_link(const char *name, const char *title,
                               const char *class, const char *head);
 extern void cgit_tag_link(const char *name, const char *title,
diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index 2481585..9fb5b11 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -2,10 +2,12 @@
 #include "html.h"
 #include "ui-shared.h"
 #include "ui-diff.h"
+#include "ui-ssdiff.h"
 
 extern int use_ssdiff;
 
 static int current_old_line, current_new_line;
+static int **L = NULL;
 
 struct deferred_lines {
         int line_no;
@@ -16,16 +18,42 @@ struct deferred_lines {
 static struct deferred_lines *deferred_old, *deferred_old_last;
 static struct deferred_lines *deferred_new, *deferred_new_last;
 
+static void create_or_reset_lcs_table()
+{
+        int i;
+
+        if (L != NULL) {
+                memset(*L, 0, sizeof(*L) * MAX_SSDIFF_SIZE);
+                return;
+        }
+
+        // xcalloc will die if we ran out of memory;
+        // not very helpful for debugging
+        L = (int**)xcalloc(MAX_SSDIFF_M, sizeof(int *));
+        *L = (int*)xcalloc(MAX_SSDIFF_SIZE, sizeof(int));
+
+        for (i = 1; i < MAX_SSDIFF_M; i++) {
+                L[i] = *L + i * MAX_SSDIFF_N;
+        }
+}
+
 static char *longest_common_subsequence(char *A, char *B)
 {
         int i, j, ri;
         int m = strlen(A);
         int n = strlen(B);
-        int L[m + 1][n + 1];
-        int tmp1, tmp2;
+        int tmp1, tmp2, length;
         int lcs_length;
         char *result;
 
+        length = (m + 1) * (n + 1);
+
+        // We bail if the lines are too long
+        if (length > MAX_SSDIFF_SIZE)
+                return NULL;
+
+        create_or_reset_lcs_table();
+
         for (i = m; i >= 0; i--) {
                 for (j = n; j >= 0; j--) {
                         if (A[i] == '\0' || B[j] == '\0') {
@@ -59,6 +87,7 @@ static char *longest_common_subsequence(char *A, char *B)
                         j += 1;
                 }
         }
+
         return result;
 }
 
diff --git a/ui-ssdiff.h b/ui-ssdiff.h
index 64b4b12..88627e2 100644
--- a/ui-ssdiff.h
+++ b/ui-ssdiff.h
@@ -1,6 +1,18 @@
 #ifndef UI_SSDIFF_H
 #define UI_SSDIFF_H
 
+/*
+ * ssdiff line limits
+ */
+#ifndef MAX_SSDIFF_M
+#define MAX_SSDIFF_M 128
+#endif
+
+#ifndef MAX_SSDIFF_N
+#define MAX_SSDIFF_N 128
+#endif
+#define MAX_SSDIFF_SIZE ((MAX_SSDIFF_M) * (MAX_SSDIFF_N))
+
 extern void cgit_ssdiff_print_deferred_lines();
 
 extern void cgit_ssdiff_line_cb(char *line, int len);