[PATCH] diff: mode bits fixes

[git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index 942b673..ac7bf9f 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -6,9 +6,8 @@
  * This handles basic git sha1 object files - packing, unpacking,
  * creation etc.
  */
-#include <stdarg.h>
-#include <limits.h>
 #include "cache.h"
+#include "delta.h"
 
 #ifndef O_NOATIME
 #if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
@@ -44,7 +43,7 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
        return 0;
 }
 
-int get_sha1_file(const char *path, unsigned char *result)
+static int get_sha1_file(const char *path, unsigned char *result)
 {
        char buffer[60];
        int fd = open(path, O_RDONLY);
@@ -199,7 +198,7 @@ static void prepare_alt_odb(void)
 {
        int pass, totlen, i;
        const char *cp, *last;
-       char *op = 0;
+       char *op = NULL;
        const char *alt = gitenv(ALTERNATE_DB_ENVIRONMENT) ? : "";
 
        /* The first pass counts how large an area to allocate to
@@ -236,7 +235,7 @@ static void prepare_alt_odb(void)
                if (pass)
                        break;
                alt_odb = xmalloc(sizeof(*alt_odb) * (i + 1) + totlen);
-               alt_odb[i].base = alt_odb[i].name = 0;
+               alt_odb[i].base = alt_odb[i].name = NULL;
                op = (char*)(&alt_odb[i+1]);
        }
 }
@@ -313,13 +312,13 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
        int ret, bytes;
        z_stream stream;
        char buffer[8192];
-       char *buf;
+       unsigned char *buf;
 
        /* Get the data stream */
        memset(&stream, 0, sizeof(stream));
        stream.next_in = map;
        stream.avail_in = mapsize;
-       stream.next_out = buffer;
+       stream.next_out = (unsigned char *)buffer;
        stream.avail_out = sizeof(buffer);
 
        inflateInit(&stream);
@@ -330,7 +329,7 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
                return NULL;
 
        bytes = strlen(buffer) + 1;
-       buf = xmalloc(*size);
+       buf = xmalloc(1+*size);
 
        memcpy(buf, buffer + bytes, stream.total_out - bytes);
        bytes = stream.total_out - bytes;
@@ -340,6 +339,7 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
                while (inflate(&stream, Z_FINISH) == Z_OK)
                        /* nothing */;
        }
+       buf[*size] = 0;
        inflateEnd(&stream);
        return buf;
 }
@@ -353,13 +353,26 @@ void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size
        if (map) {
                buf = unpack_sha1_file(map, mapsize, type, size);
                munmap(map, mapsize);
+               if (buf && !strcmp(type, "delta")) {
+                       void *ref = NULL, *delta = buf;
+                       unsigned long ref_size, delta_size = *size;
+                       buf = NULL;
+                       if (delta_size > 20)
+                               ref = read_sha1_file(delta, type, &ref_size);
+                       if (ref)
+                               buf = patch_delta(ref, ref_size,
+                                                 delta+20, delta_size-20, 
+                                                 size);
+                       free(delta);
+                       free(ref);
+               }
                return buf;
        }
        return NULL;
 }
 
 void *read_object_with_reference(const unsigned char *sha1,
-                                const unsigned char *required_type,
+                                const char *required_type,
                                 unsigned long *size,
                                 unsigned char *actual_sha1_return)
 {
@@ -403,20 +416,20 @@ void *read_object_with_reference(const unsigned char *sha1,
        }
 }
 
-int write_sha1_file(char *buf, unsigned long len, const char *type, unsigned char *returnsha1)
+int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
 {
        int size;
-       char *compressed;
+       unsigned char *compressed;
        z_stream stream;
        unsigned char sha1[20];
        SHA_CTX c;
        char *filename;
        static char tmpfile[PATH_MAX];
-       char hdr[50];
+       unsigned char hdr[50];
        int fd, hdrlen, ret;
 
        /* Generate the header */
-       hdrlen = sprintf(hdr, "%s %lu", type, len)+1;
+       hdrlen = sprintf((char *)hdr, "%s %lu", type, len)+1;
 
        /* Sha1.. */
        SHA1_Init(&c);
@@ -516,8 +529,8 @@ int write_sha1_from_fd(const unsigned char *sha1, int fd)
        int local;
        z_stream stream;
        unsigned char real_sha1[20];
-       char buf[4096];
-       char discard[4096];
+       unsigned char buf[4096];
+       unsigned char discard[4096];
        int ret;
        SHA_CTX c;