[PATCH] Fix a crash when doing rev-tree

[git.git] / read-cache.c

diff --git a/read-cache.c b/read-cache.c
index 53da500..5453694 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -12,10 +12,12 @@ unsigned int active_nr = 0, active_alloc = 0;
 void usage(const char *err, ...)
 {
        va_list args;
+       char string[200];
 
        va_start(args, err);
-       vfprintf(stderr, err, args);
+       vsnprintf(string, sizeof(string), err, args);
        va_end(args);
+       fprintf(stderr, "%s\n", string);
        exit(1);
 }
 
@@ -276,24 +278,23 @@ int cache_name_pos(const char *name, int namelen)
                struct cache_entry *ce = active_cache[next];
                int cmp = cache_name_compare(name, namelen, ce->name, ce->namelen);
                if (!cmp)
-                       return -next-1;
+                       return next;
                if (cmp < 0) {
                        last = next;
                        continue;
                }
                first = next+1;
        }
-       return first;
+       return -first-1;
 }
 
 int remove_file_from_cache(char *path)
 {
        int pos = cache_name_pos(path, strlen(path));
-       if (pos < 0) {
-               pos = -pos-1;
+       if (pos >= 0) {
                active_nr--;
                if (pos < active_nr)
-                       memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos - 1) * sizeof(struct cache_entry *));
+                       memmove(active_cache + pos, active_cache + pos + 1, (active_nr - pos) * sizeof(struct cache_entry *));
        }
        return 0;
 }
@@ -305,10 +306,11 @@ int add_cache_entry(struct cache_entry *ce, int ok_to_add)
        pos = cache_name_pos(ce->name, ce->namelen);
 
        /* existing match? Just replace it */
-       if (pos < 0) {
-               active_cache[-pos-1] = ce;
+       if (pos >= 0) {
+               active_cache[pos] = ce;
                return 0;
        }
+       pos = -pos-1;
 
        if (!ok_to_add)
                return -1;
@@ -362,7 +364,7 @@ int read_cache(void)
                sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
        if (access(sha1_file_directory, X_OK) < 0)
                return error("no access to SHA1 file directory");
-       fd = open(".dircache/index", O_RDONLY);
+       fd = open(".git/index", O_RDONLY);
        if (fd < 0)
                return (errno == ENOENT) ? 0 : error("open failed");