Optionally support old diffs

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index 8bebbb2..64cf245 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -6,8 +6,6 @@
  * This handles basic git sha1 object files - packing, unpacking,
  * creation etc.
  */
-#include <sys/types.h>
-#include <dirent.h>
 #include "cache.h"
 #include "delta.h"
 #include "pack.h"
@@ -74,6 +72,8 @@ int adjust_shared_perm(const char *path)
 int safe_create_leading_directories(char *path)
 {
        char *pos = path;
+       struct stat st;
+
        if (*pos == '/')
                pos++;
 
@@ -82,12 +82,17 @@ int safe_create_leading_directories(char *path)
                if (!pos)
                        break;
                *pos = 0;
-               if (mkdir(path, 0777) < 0) {
-                       if (errno != EEXIST) {
+               if (!stat(path, &st)) {
+                       /* path exists */
+                       if (!S_ISDIR(st.st_mode)) {
                                *pos = '/';
-                               return -1;
+                               return -3;
                        }
                }
+               else if (mkdir(path, 0777)) {
+                       *pos = '/';
+                       return -1;
+               }
                else if (adjust_shared_perm(path)) {
                        *pos = '/';
                        return -2;
@@ -349,16 +354,12 @@ struct packed_git *packed_git;
 static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
                                void **idx_map_)
 {
-       SHA_CTX ctx;
-       unsigned char sha1[20];
        void *idx_map;
        unsigned int *index;
        unsigned long idx_size;
        int nr, i;
-       int fd;
+       int fd = open(path, O_RDONLY);
        struct stat st;
-
-       fd = open(path, O_RDONLY);
        if (fd < 0)
                return -1;
        if (fstat(fd, &st)) {
@@ -396,16 +397,6 @@ static int check_packed_git_idx(const char *path, unsigned long *idx_size_,
        if (idx_size != 4*256 + nr * 24 + 20 + 20)
                return error("wrong index file size");
 
-       /*
-        * File checksum.
-        */
-       SHA1_Init(&ctx);
-       SHA1_Update(&ctx, idx_map, idx_size-20);
-       SHA1_Final(sha1, &ctx);
-
-       if (memcmp(sha1, idx_map + idx_size - 20, 20))
-               return error("index checksum mismatch");
-
        return 0;
 }
 
@@ -839,7 +830,7 @@ void packed_object_info_detail(struct pack_entry *e,
                               char *type,
                               unsigned long *size,
                               unsigned long *store_size,
-                              int *delta_chain_length,
+                              unsigned int *delta_chain_length,
                               unsigned char *base_sha1)
 {
        struct packed_git *p = e->p;
@@ -853,7 +844,7 @@ void packed_object_info_detail(struct pack_entry *e,
        if (kind != OBJ_DELTA)
                *delta_chain_length = 0;
        else {
-               int chain_length = 0;
+               unsigned int chain_length = 0;
                memcpy(base_sha1, pack, 20);
                do {
                        struct pack_entry base_ent;