git-am: Don't accept an mbox on stdin of we already have a .dotest directory

diff --git a/diff-delta.c b/diff-delta.c
index 25a798d050c6319f3d524c9c605ab70ea35ae7a1..7da9205a5da6a4f016bc6b556bee01895cdcc19d 100644 (file)
--- a/diff-delta.c
+++ b/diff-delta.c
@@ -22,6 +22,7 @@
 #include <string.h>
 #include "delta.h"
 
+#include "git-compat-util.h"
 
 /* maximum hash entry list for the same hash bucket */
 #define HASH_LIMIT 64
@@ -131,7 +132,7 @@ struct delta_index {
        const void *src_buf;
        unsigned long src_size;
        unsigned int hash_mask;
-       struct index_entry *hash[0];
+       struct index_entry *hash[FLEX_ARRAY];
 };
 
 struct delta_index * create_delta_index(const void *buf, unsigned long bufsize)
@@ -147,7 +148,7 @@ struct delta_index * create_delta_index(const void *buf, unsigned long bufsize)
                return NULL;
 
        /* Determine index hash size.  Note that indexing skips the
-          first byte to allow for optimizing the rabin polynomial
+          first byte to allow for optimizing the Rabin's polynomial
           initialization in create_delta(). */
        entries = (bufsize - 1)  / RABIN_WINDOW;
        hsize = entries / 4;
@@ -204,7 +205,7 @@ struct delta_index * create_delta_index(const void *buf, unsigned long bufsize)
 
        /*
         * Determine a limit on the number of entries in the same hash
-        * bucket.  This guard us against patological data sets causing
+        * bucket.  This guards us against pathological data sets causing
         * really bad hash distribution with most entries in the same hash
         * bucket that would bring us to O(m*n) computing costs (m and n
         * corresponding to reference and target buffer sizes).
@@ -239,7 +240,7 @@ void free_delta_index(struct delta_index *index)
 
 /*
  * The maximum size for any opcode sequence, including the initial header
- * plus rabin window plus biggest copy.
+ * plus Rabin window plus biggest copy.
  */
 #define MAX_OP_SIZE    (5 + 5 + 1 + RABIN_WINDOW + 7)
 
@@ -283,7 +284,7 @@ create_delta(const struct delta_index *index,
        ref_data = index->src_buf;
        ref_top = ref_data + index->src_size;
        data = trg_buf;
-       top = trg_buf + trg_size;
+       top = (const unsigned char *) trg_buf + trg_size;
 
        outpos++;
        val = 0;