Add a "git-show-index" helper that shows the contents of a pack index

[git.git] / show-index.c

diff --git a/show-index.c b/show-index.c
new file mode 100644 (file)
index 0000000..c21d660
--- /dev/null
+++ b/show-index.c
@@ -0,0 +1,28 @@
+#include "cache.h"
+
+int main(int argc, char **argv)
+{
+       int i;
+       unsigned nr;
+       unsigned int entry[6];
+       static unsigned int top_index[256];
+
+       if (fread(top_index, sizeof(top_index), 1, stdin) != 1)
+               die("unable to read idex");
+       nr = 0;
+       for (i = 0; i < 256; i++) {
+               unsigned n = ntohl(top_index[i]);
+               if (n < nr)
+                       die("corrupt index file");
+               nr = n;
+       }
+       for (i = 0; i < nr; i++) {
+               unsigned offset;
+
+               if (fread(entry, 24, 1, stdin) != 1)
+                       die("unable to read entry %u/%u", i, nr);
+               offset = ntohl(entry[0]);
+               printf("%u %s\n", offset, sha1_to_hex((void *)(entry+1)));
+       }
+       return 0;
+}