Bump version.

[cgit.git] / ui-ssdiff.c

diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index 2481585fb619966173fcde2e4d35ba1614482093..7f261ed53a0077fa3fd4a8dab3db1fcdcf247a8c 100644 (file)
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -1,4 +1,5 @@
 #include "cgit.h"
+#include "ui-ssdiff.h"
 #include "html.h"
 #include "ui-shared.h"
 #include "ui-diff.h"
@@ -6,6 +7,7 @@
 extern int use_ssdiff;
 
 static int current_old_line, current_new_line;
+static int **L = NULL;
 
 struct deferred_lines {
        int line_no;
@@ -16,16 +18,40 @@ 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(void)
+{
+       int i;
+
+       if (L != NULL) {
+               memset(*L, 0, sizeof(int) * 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 lcs_length;
        char *result;
 
+       // We bail if the lines are too long
+       if (m >= MAX_SSDIFF_M || n >= MAX_SSDIFF_N)
+               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') {
@@ -59,13 +85,14 @@ static char *longest_common_subsequence(char *A, char *B)
                        j += 1;
                }
        }
+
        return result;
 }
 
 static int line_from_hunk(char *line, char type)
 {
        char *buf1, *buf2;
-       int len;
+       int len, res;
 
        buf1 = strchr(line, type);
        if (buf1 == NULL)
@@ -78,7 +105,7 @@ static int line_from_hunk(char *line, char type)
        buf2 = xmalloc(len + 1);
        strncpy(buf2, buf1, len);
        buf2[len] = '\0';
-       int res = atoi(buf2);
+       res = atoi(buf2);
        free(buf2);
        return res;
 }
@@ -111,9 +138,8 @@ static char *replace_tabs(char *line)
                        strcat(result, prev_buf);
                        break;
                } else {
-                       strcat(result, " ");
-                       strncat(result, spaces, 8 - (strlen(result) % 8));
                        strncat(result, prev_buf, cur_buf - prev_buf);
+                       strncat(result, spaces, 8 - (strlen(result) % 8));
                }
                prev_buf = cur_buf + 1;
        }
@@ -203,12 +229,14 @@ static void print_ssdiff_line(char *class,
        if (old_line_no > 0) {
                struct diff_filespec *old_file = cgit_get_current_old_file();
                char *lineno_str = fmt("n%d", old_line_no);
-               char *id_str = fmt("%s#%s", is_null_sha1(old_file->sha1)?"HEAD":sha1_to_hex(old_rev_sha1), lineno_str);
-               html("<td class='lineno'><a class='no' href='");
-               html(cgit_fileurl(ctx.repo->url, "tree", old_file->path, id_str));
-               htmlf("' id='%s' name='%s'>%s</a>", lineno_str, lineno_str, lineno_str + 1);
+               char *id_str = fmt("id=%s#%s", is_null_oid(&old_file->oid)?"HEAD":oid_to_hex(old_rev_oid), lineno_str);
+               char *fileurl = cgit_fileurl(ctx.repo->url, "tree", old_file->path, id_str);
+               html("<td class='lineno'><a href='");
+               html(fileurl);
+               htmlf("' id='%s'>%s</a>", lineno_str, lineno_str + 1);
                html("</td>");
                htmlf("<td class='%s'>", class);
+               free(fileurl);
        } else if (old_line)
                htmlf("<td class='lineno'></td><td class='%s'>", class);
        else
@@ -224,12 +252,14 @@ static void print_ssdiff_line(char *class,
        if (new_line_no > 0) {
                struct diff_filespec *new_file = cgit_get_current_new_file();
                char *lineno_str = fmt("n%d", new_line_no);
-               char *id_str = fmt("%s#%s", is_null_sha1(new_file->sha1)?"HEAD":sha1_to_hex(new_rev_sha1), lineno_str);
-               html("<td class='lineno'><a class='no' href='");
-               html(cgit_fileurl(ctx.repo->url, "tree", new_file->path, id_str));
-               htmlf("' id='%s' name='%s'>%s</a>", lineno_str, lineno_str, lineno_str + 1);
+               char *id_str = fmt("id=%s#%s", is_null_oid(&new_file->oid)?"HEAD":oid_to_hex(new_rev_oid), lineno_str);
+               char *fileurl = cgit_fileurl(ctx.repo->url, "tree", new_file->path, id_str);
+               html("<td class='lineno'><a href='");
+               html(fileurl);
+               htmlf("' id='%s'>%s</a>", lineno_str, lineno_str + 1);
                html("</td>");
                htmlf("<td class='%s'>", class);
+               free(fileurl);
        } else if (new_line)
                htmlf("<td class='lineno'></td><td class='%s'>", class);
        else
@@ -250,7 +280,7 @@ static void print_ssdiff_line(char *class,
                free(old_line);
 }
 
-static void print_deferred_old_lines()
+static void print_deferred_old_lines(void)
 {
        struct deferred_lines *iter_old, *tmp;
        iter_old = deferred_old;
@@ -263,7 +293,7 @@ static void print_deferred_old_lines()
        }
 }
 
-static void print_deferred_new_lines()
+static void print_deferred_new_lines(void)
 {
        struct deferred_lines *iter_new, *tmp;
        iter_new = deferred_new;
@@ -276,7 +306,7 @@ static void print_deferred_new_lines()
        }
 }
 
-static void print_deferred_changed_lines()
+static void print_deferred_changed_lines(void)
 {
        struct deferred_lines *iter_old, *iter_new, *tmp;
        int n_old_lines = calc_deferred_lines(deferred_old);
@@ -311,7 +341,7 @@ static void print_deferred_changed_lines()
        }
 }
 
-void cgit_ssdiff_print_deferred_lines()
+void cgit_ssdiff_print_deferred_lines(void)
 {
        if (!deferred_old && !deferred_new)
                return;
@@ -362,7 +392,7 @@ void cgit_ssdiff_line_cb(char *line, int len)
        line[len - 1] = c;
 }
 
-void cgit_ssdiff_header_begin()
+void cgit_ssdiff_header_begin(void)
 {
        current_old_line = -1;
        current_new_line = -1;
@@ -370,12 +400,12 @@ void cgit_ssdiff_header_begin()
        html("<tr><td class='head' colspan='4'>");
 }
 
-void cgit_ssdiff_header_end()
+void cgit_ssdiff_header_end(void)
 {
        html("</td><tr>");
 }
 
-void cgit_ssdiff_footer()
+void cgit_ssdiff_footer(void)
 {
        if (deferred_old || deferred_new)
                cgit_ssdiff_print_deferred_lines();