snapshot: strip bit from struct cgit_snapshot_format

We had a static bit value in struct cgit_snapshot_format. We do not rely
on it and things can be calculated on the fly. So strip it.

Signed-off-by: Christian Hesse <mail@eworm.de>

5 files changed, 17 insertions, 10 deletions

@@ -765,7 +765,7 @@ static char *build_snapshot_setting(int bitmap)
         struct strbuf result = STRBUF_INIT;
 
         for (f = cgit_snapshot_formats; f->suffix; f++) {
-                if (f->bit & bitmap) {
+                if (cgit_snapshot_format_bit(f) & bitmap) {
                         if (result.len)
                                 strbuf_addch(&result, ' ');
                         strbuf_addstr(&result, f->suffix);
@@ -46,6 +46,8 @@
  */
 #define PAGE_ENCODING "UTF-8"
 
+#define BIT(x)  (1U << (x))
+
 typedef void (*configfn)(const char *name, const char *value);
 typedef void (*filepair_fn)(struct diff_filepair *pair);
 typedef void (*linediff_fn)(char *line, int len);
@@ -314,7 +316,6 @@ struct cgit_snapshot_format {
         const char *suffix;
         const char *mimetype;
         write_archive_fn_t write_func;
-        int bit;
 };
 
 extern const char *cgit_version;
@@ -376,6 +377,7 @@ extern const char *cgit_repobasename(const char *reponame);
 extern int cgit_parse_snapshots_mask(const char *str);
 extern const struct object_id *cgit_snapshot_get_sig(const char *ref,
                                                      const struct cgit_snapshot_format *f);
+extern const unsigned cgit_snapshot_format_bit(const struct cgit_snapshot_format *f);
 
 extern int cgit_open_filter(struct cgit_filter *filter, ...);
 extern int cgit_close_filter(struct cgit_filter *filter);
@@ -400,7 +400,7 @@ int cgit_parse_snapshots_mask(const char *str)
                 for (f = cgit_snapshot_formats; f->suffix; f++) {
                         if (!strcmp(item->string, f->suffix) ||
                             !strcmp(item->string, f->suffix + 1)) {
-                                rv |= f->bit;
+                                rv |= cgit_snapshot_format_bit(f);
                                 break;
                         }
                 }
@@ -1127,7 +1127,7 @@ void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
 
         prefixlen = filename.len;
         for (f = cgit_snapshot_formats; f->suffix; f++) {
-                if (!(repo->snapshots & f->bit))
+                if (!(repo->snapshots & cgit_snapshot_format_bit(f)))
                         continue;
                 strbuf_setlen(&filename, prefixlen);
                 strbuf_addstr(&filename, f->suffix);
@@ -86,11 +86,11 @@ static int write_tar_xz_archive(const char *hex, const char *prefix)
 }
 
 const struct cgit_snapshot_format cgit_snapshot_formats[] = {
-        { ".zip", "application/x-zip", write_zip_archive, 0x01 },
-        { ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x02 },
-        { ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x04 },
-        { ".tar", "application/x-tar", write_tar_archive, 0x08 },
-        { ".tar.xz", "application/x-xz", write_tar_xz_archive, 0x10 },
+        { ".tar",       "application/x-tar",    write_tar_archive       },
+        { ".tar.gz",    "application/x-gzip",   write_tar_gzip_archive  },
+        { ".tar.bz2",   "application/x-bzip2",  write_tar_bzip2_archive },
+        { ".tar.xz",    "application/x-xz",     write_tar_xz_archive    },
+        { ".zip",       "application/x-zip",    write_zip_archive       },
         { NULL }
 };
 
@@ -130,6 +130,11 @@ static const struct cgit_snapshot_format *get_format(const char *filename)
         return NULL;
 }
 
+const unsigned cgit_snapshot_format_bit(const struct cgit_snapshot_format *f)
+{
+        return BIT(f - &cgit_snapshot_formats[0]);
+}
+
 static int make_snapshot(const struct cgit_snapshot_format *format,
                          const char *hex, const char *prefix,
                          const char *filename)
@@ -263,7 +268,7 @@ void cgit_print_snapshot(const char *head, const char *hex,
         }
 
         f = get_format(filename);
-        if (!f || !(ctx.repo->snapshots & f->bit)) {
+        if (!f || !(ctx.repo->snapshots & cgit_snapshot_format_bit(f))) {
                 cgit_print_error_page(400, "Bad request",
                                 "Unsupported snapshot format: %s", filename);
                 return;