Document some default values in config.txt

diff --git a/sha1_file.c b/sha1_file.c
index 83a06a7aed84715db191b703e529d3501df0a8f2..6583797ce5853bc17ce95bf4cc86af6ee0f660b1 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -25,8 +25,10 @@
 
 #ifdef NO_C99_FORMAT
 #define SZ_FMT "lu"
+static unsigned long sz_fmt(size_t s) { return (unsigned long)s; }
 #else
 #define SZ_FMT "zu"
+static size_t sz_fmt(size_t s) { return s; }
 #endif
 
 const unsigned char null_sha1[20];
@@ -86,7 +88,7 @@ int safe_create_leading_directories(char *path)
        char *pos = path;
        struct stat st;
 
-       if (*pos == '/')
+       if (is_absolute_path(path))
                pos++;
 
        while (pos) {
@@ -146,7 +148,7 @@ static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
 
 /*
  * NOTE! This returns a statically allocated buffer, so you have to be
- * careful about using it. Do a "xstrdup()" if you need to save the
+ * careful about using it. Do an "xstrdup()" if you need to save the
  * filename.
  *
  * Also note that this returns the location for creating.  Reading
@@ -253,7 +255,7 @@ static int link_alt_odb_entry(const char * entry, int len, const char * relative
        int entlen = pfxlen + 43;
        int base_len = -1;
 
-       if (*entry != '/' && relative_base) {
+       if (!is_absolute_path(entry) && relative_base) {
                /* Relative alt-odb */
                if (base_len < 0)
                        base_len = strlen(relative_base) + 1;
@@ -262,7 +264,7 @@ static int link_alt_odb_entry(const char * entry, int len, const char * relative
        }
        ent = xmalloc(sizeof(*ent) + entlen);
 
-       if (*entry != '/' && relative_base) {
+       if (!is_absolute_path(entry) && relative_base) {
                memcpy(ent->base, relative_base, base_len - 1);
                ent->base[base_len - 1] = '/';
                memcpy(ent->base + base_len, entry, len);
@@ -333,7 +335,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
                while (cp < ep && *cp != sep)
                        cp++;
                if (last != cp) {
-                       if ((*last != '/') && depth) {
+                       if (!is_absolute_path(last) && depth) {
                                error("%s: ignoring relative alternate object store %s",
                                                relative_base, last);
                        } else {
@@ -423,9 +425,9 @@ void pack_report(void)
                "pack_report: getpagesize()            = %10" SZ_FMT "\n"
                "pack_report: core.packedGitWindowSize = %10" SZ_FMT "\n"
                "pack_report: core.packedGitLimit      = %10" SZ_FMT "\n",
-               (size_t) getpagesize(),
-               packed_git_window_size,
-               packed_git_limit);
+               sz_fmt(getpagesize()),
+               sz_fmt(packed_git_window_size),
+               sz_fmt(packed_git_limit));
        fprintf(stderr,
                "pack_report: pack_used_ctr            = %10u\n"
                "pack_report: pack_mmap_calls          = %10u\n"
@@ -435,7 +437,7 @@ void pack_report(void)
                pack_used_ctr,
                pack_mmap_calls,
                pack_open_windows, peak_pack_open_windows,
-               pack_mapped, peak_pack_mapped);
+               sz_fmt(pack_mapped), sz_fmt(peak_pack_mapped));
 }
 
 static int check_packed_git_idx(const char *path,  struct packed_git *p)
@@ -521,13 +523,15 @@ static int check_packed_git_idx(const char *path,  struct packed_git *p)
                        munmap(idx_map, idx_size);
                        return error("wrong index v2 file size in %s", path);
                }
-               if (idx_size != min_size) {
-                       /* make sure we can deal with large pack offsets */
-                       off_t x = 0x7fffffffUL, y = 0xffffffffUL;
-                       if (x > (x + 1) || y > (y + 1)) {
-                               munmap(idx_map, idx_size);
-                               return error("pack too large for current definition of off_t in %s", path);
-                       }
+               if (idx_size != min_size &&
+                   /*
+                    * make sure we can deal with large pack offsets.
+                    * 31-bit signed offset won't be enough, neither
+                    * 32-bit unsigned one will be.
+                    */
+                   (sizeof(off_t) <= 4)) {
+                       munmap(idx_map, idx_size);
+                       return error("pack too large for current definition of off_t in %s", path);
                }
        }