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Diffstat (limited to 'sha1_file.c')
-rw-r--r--sha1_file.c172
1 files changed, 82 insertions, 90 deletions
diff --git a/sha1_file.c b/sha1_file.c
index 423ff0a..3831614 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -983,26 +983,27 @@ static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size
* too permissive for what we want to check. So do an anal
* object header parse by hand.
*/
-static int parse_sha1_header(char *hdr, char *type, unsigned long *sizep)
+static int parse_sha1_header(const char *hdr, unsigned long *sizep)
{
+ char type[10];
int i;
unsigned long size;
/*
* The type can be at most ten bytes (including the
* terminating '\0' that we add), and is followed by
- * a space.
+ * a space.
*/
- i = 10;
+ i = 0;
for (;;) {
char c = *hdr++;
if (c == ' ')
break;
- if (!--i)
+ type[i++] = c;
+ if (i >= sizeof(type))
return -1;
- *type++ = c;
}
- *type = 0;
+ type[i] = 0;
/*
* The length must follow immediately, and be in canonical
@@ -1025,17 +1026,17 @@ static int parse_sha1_header(char *hdr, char *type, unsigned long *sizep)
/*
* The length must be followed by a zero byte
*/
- return *hdr ? -1 : 0;
+ return *hdr ? -1 : type_from_string(type);
}
-void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size)
+void * unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type, unsigned long *size)
{
int ret;
z_stream stream;
char hdr[8192];
ret = unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr));
- if (ret < Z_OK || parse_sha1_header(hdr, type, size) < 0)
+ if (ret < Z_OK || (*type = parse_sha1_header(hdr, size)) < 0)
return NULL;
return unpack_sha1_rest(&stream, hdr, *size);
@@ -1044,7 +1045,7 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned l
static unsigned long get_delta_base(struct packed_git *p,
struct pack_window **w_curs,
unsigned long *curpos,
- enum object_type kind,
+ enum object_type type,
unsigned long delta_obj_offset)
{
unsigned char *base_info = use_pack(p, w_curs, *curpos, NULL);
@@ -1056,7 +1057,7 @@ static unsigned long get_delta_base(struct packed_git *p,
* that is assured. An OFS_DELTA longer than the hash size
* is stupid, as then a REF_DELTA would be smaller to store.
*/
- if (kind == OBJ_OFS_DELTA) {
+ if (type == OBJ_OFS_DELTA) {
unsigned used = 0;
unsigned char c = base_info[used++];
base_offset = c & 127;
@@ -1071,7 +1072,7 @@ static unsigned long get_delta_base(struct packed_git *p,
if (base_offset >= delta_obj_offset)
die("delta base offset out of bound");
*curpos += used;
- } else if (kind == OBJ_REF_DELTA) {
+ } else if (type == OBJ_REF_DELTA) {
/* The base entry _must_ be in the same pack */
base_offset = find_pack_entry_one(base_info, p);
if (!base_offset)
@@ -1085,28 +1086,25 @@ static unsigned long get_delta_base(struct packed_git *p,
/* forward declaration for a mutually recursive function */
static int packed_object_info(struct packed_git *p, unsigned long offset,
- char *type, unsigned long *sizep);
+ unsigned long *sizep);
static int packed_delta_info(struct packed_git *p,
struct pack_window **w_curs,
unsigned long curpos,
- enum object_type kind,
+ enum object_type type,
unsigned long obj_offset,
- char *type,
unsigned long *sizep)
{
unsigned long base_offset;
- base_offset = get_delta_base(p, w_curs, &curpos, kind, obj_offset);
+ base_offset = get_delta_base(p, w_curs, &curpos, type, obj_offset);
+ type = packed_object_info(p, base_offset, NULL);
/* We choose to only get the type of the base object and
* ignore potentially corrupt pack file that expects the delta
* based on a base with a wrong size. This saves tons of
* inflate() calls.
*/
- if (packed_object_info(p, base_offset, type, NULL))
- die("cannot get info for delta-pack base");
-
if (sizep) {
const unsigned char *data;
unsigned char delta_head[20], *in;
@@ -1141,7 +1139,8 @@ static int packed_delta_info(struct packed_git *p,
/* Read the result size */
*sizep = get_delta_hdr_size(&data, delta_head+sizeof(delta_head));
}
- return 0;
+
+ return type;
}
static int unpack_object_header(struct packed_git *p,
@@ -1169,38 +1168,36 @@ static int unpack_object_header(struct packed_git *p,
return type;
}
-void packed_object_info_detail(struct packed_git *p,
- unsigned long obj_offset,
- char *type,
- unsigned long *size,
- unsigned long *store_size,
- unsigned int *delta_chain_length,
- unsigned char *base_sha1)
+const char *packed_object_info_detail(struct packed_git *p,
+ unsigned long obj_offset,
+ unsigned long *size,
+ unsigned long *store_size,
+ unsigned int *delta_chain_length,
+ unsigned char *base_sha1)
{
struct pack_window *w_curs = NULL;
unsigned long curpos, dummy;
unsigned char *next_sha1;
- enum object_type kind;
+ enum object_type type;
*delta_chain_length = 0;
curpos = obj_offset;
- kind = unpack_object_header(p, &w_curs, &curpos, size);
+ type = unpack_object_header(p, &w_curs, &curpos, size);
for (;;) {
- switch (kind) {
+ switch (type) {
default:
die("pack %s contains unknown object type %d",
- p->pack_name, kind);
+ p->pack_name, type);
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
- strcpy(type, typename(kind));
*store_size = 0; /* notyet */
unuse_pack(&w_curs);
- return;
+ return typename(type);
case OBJ_OFS_DELTA:
- obj_offset = get_delta_base(p, &w_curs, &curpos, kind, obj_offset);
+ obj_offset = get_delta_base(p, &w_curs, &curpos, type, obj_offset);
if (*delta_chain_length == 0) {
/* TODO: find base_sha1 as pointed by curpos */
}
@@ -1214,39 +1211,38 @@ void packed_object_info_detail(struct packed_git *p,
}
(*delta_chain_length)++;
curpos = obj_offset;
- kind = unpack_object_header(p, &w_curs, &curpos, &dummy);
+ type = unpack_object_header(p, &w_curs, &curpos, &dummy);
}
}
static int packed_object_info(struct packed_git *p, unsigned long obj_offset,
- char *type, unsigned long *sizep)
+ unsigned long *sizep)
{
struct pack_window *w_curs = NULL;
unsigned long size, curpos = obj_offset;
- enum object_type kind;
+ enum object_type type;
- kind = unpack_object_header(p, &w_curs, &curpos, &size);
+ type = unpack_object_header(p, &w_curs, &curpos, &size);
- switch (kind) {
+ switch (type) {
case OBJ_OFS_DELTA:
case OBJ_REF_DELTA:
- packed_delta_info(p, &w_curs, curpos, kind,
- obj_offset, type, sizep);
+ type = packed_delta_info(p, &w_curs, curpos,
+ type, obj_offset, sizep);
break;
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
- strcpy(type, typename(kind));
if (sizep)
*sizep = size;
break;
default:
die("pack %s contains unknown object type %d",
- p->pack_name, kind);
+ p->pack_name, type);
}
unuse_pack(&w_curs);
- return 0;
+ return type;
}
static void *unpack_compressed_entry(struct packed_git *p,
@@ -1284,15 +1280,14 @@ static void *unpack_delta_entry(struct packed_git *p,
struct pack_window **w_curs,
unsigned long curpos,
unsigned long delta_size,
- enum object_type kind,
unsigned long obj_offset,
- char *type,
+ enum object_type *type,
unsigned long *sizep)
{
void *delta_data, *result, *base;
- unsigned long result_size, base_size, base_offset;
+ unsigned long base_size, base_offset;
- base_offset = get_delta_base(p, w_curs, &curpos, kind, obj_offset);
+ base_offset = get_delta_base(p, w_curs, &curpos, *type, obj_offset);
base = unpack_entry(p, base_offset, type, &base_size);
if (!base)
die("failed to read delta base object at %lu from %s",
@@ -1301,43 +1296,39 @@ static void *unpack_delta_entry(struct packed_git *p,
delta_data = unpack_compressed_entry(p, w_curs, curpos, delta_size);
result = patch_delta(base, base_size,
delta_data, delta_size,
- &result_size);
+ sizep);
if (!result)
die("failed to apply delta");
free(delta_data);
free(base);
- *sizep = result_size;
return result;
}
void *unpack_entry(struct packed_git *p, unsigned long obj_offset,
- char *type, unsigned long *sizep)
+ enum object_type *type, unsigned long *sizep)
{
struct pack_window *w_curs = NULL;
- unsigned long size, curpos = obj_offset;
- enum object_type kind;
- void *retval;
+ unsigned long curpos = obj_offset;
+ void *data;
- kind = unpack_object_header(p, &w_curs, &curpos, &size);
- switch (kind) {
+ *type = unpack_object_header(p, &w_curs, &curpos, sizep);
+ switch (*type) {
case OBJ_OFS_DELTA:
case OBJ_REF_DELTA:
- retval = unpack_delta_entry(p, &w_curs, curpos, size,
- kind, obj_offset, type, sizep);
+ data = unpack_delta_entry(p, &w_curs, curpos, *sizep,
+ obj_offset, type, sizep);
break;
case OBJ_COMMIT:
case OBJ_TREE:
case OBJ_BLOB:
case OBJ_TAG:
- strcpy(type, typename(kind));
- *sizep = size;
- retval = unpack_compressed_entry(p, &w_curs, curpos, size);
+ data = unpack_compressed_entry(p, &w_curs, curpos, *sizep);
break;
default:
- die("unknown object type %i in %s", kind, p->pack_name);
+ die("unknown object type %i in %s", *type, p->pack_name);
}
unuse_pack(&w_curs);
- return retval;
+ return data;
}
int num_packed_objects(const struct packed_git *p)
@@ -1444,10 +1435,10 @@ struct packed_git *find_sha1_pack(const unsigned char *sha1,
return p;
}
return NULL;
-
+
}
-static int sha1_loose_object_info(const unsigned char *sha1, char *type, unsigned long *sizep)
+static int sha1_loose_object_info(const unsigned char *sha1, unsigned long *sizep)
{
int status;
unsigned long mapsize, size;
@@ -1461,31 +1452,29 @@ static int sha1_loose_object_info(const unsigned char *sha1, char *type, unsigne
if (unpack_sha1_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0)
status = error("unable to unpack %s header",
sha1_to_hex(sha1));
- else if (parse_sha1_header(hdr, type, &size) < 0)
+ else if ((status = parse_sha1_header(hdr, &size)) < 0)
status = error("unable to parse %s header", sha1_to_hex(sha1));
- else {
- status = 0;
- if (sizep)
- *sizep = size;
- }
+ else if (sizep)
+ *sizep = size;
inflateEnd(&stream);
munmap(map, mapsize);
return status;
}
-int sha1_object_info(const unsigned char *sha1, char *type, unsigned long *sizep)
+int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
{
struct pack_entry e;
if (!find_pack_entry(sha1, &e, NULL)) {
reprepare_packed_git();
if (!find_pack_entry(sha1, &e, NULL))
- return sha1_loose_object_info(sha1, type, sizep);
+ return sha1_loose_object_info(sha1, sizep);
}
- return packed_object_info(e.p, e.offset, type, sizep);
+ return packed_object_info(e.p, e.offset, sizep);
}
-static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned long *size)
+static void *read_packed_sha1(const unsigned char *sha1,
+ enum object_type *type, unsigned long *size)
{
struct pack_entry e;
@@ -1503,7 +1492,7 @@ static void *read_packed_sha1(const unsigned char *sha1, char *type, unsigned lo
*/
static struct cached_object {
unsigned char sha1[20];
- const char *type;
+ enum object_type type;
void *buf;
unsigned long size;
} *cached_objects;
@@ -1521,11 +1510,12 @@ static struct cached_object *find_cached_object(const unsigned char *sha1)
return NULL;
}
-int pretend_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *sha1)
+int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
+ unsigned char *sha1)
{
struct cached_object *co;
- hash_sha1_file(buf, len, type, sha1);
+ hash_sha1_file(buf, len, typename(type), sha1);
if (has_sha1_file(sha1) || find_cached_object(sha1))
return 0;
if (cached_object_alloc <= cached_object_nr) {
@@ -1536,14 +1526,15 @@ int pretend_sha1_file(void *buf, unsigned long len, const char *type, unsigned c
}
co = &cached_objects[cached_object_nr++];
co->size = len;
- co->type = strdup(type);
+ co->type = type;
co->buf = xmalloc(len);
memcpy(co->buf, buf, len);
hashcpy(co->sha1, sha1);
return 0;
}
-void *read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
+void *read_sha1_file(const unsigned char *sha1, enum object_type *type,
+ unsigned long *size)
{
unsigned long mapsize;
void *map, *buf;
@@ -1554,7 +1545,7 @@ void *read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
buf = xmalloc(co->size + 1);
memcpy(buf, co->buf, co->size);
((char*)buf)[co->size] = 0;
- strcpy(type, co->type);
+ *type = co->type;
*size = co->size;
return buf;
}
@@ -1573,33 +1564,34 @@ void *read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size)
}
void *read_object_with_reference(const unsigned char *sha1,
- const char *required_type,
+ const char *required_type_name,
unsigned long *size,
unsigned char *actual_sha1_return)
{
- char type[20];
+ enum object_type type, required_type;
void *buffer;
unsigned long isize;
unsigned char actual_sha1[20];
+ required_type = type_from_string(required_type_name);
hashcpy(actual_sha1, sha1);
while (1) {
int ref_length = -1;
const char *ref_type = NULL;
- buffer = read_sha1_file(actual_sha1, type, &isize);
+ buffer = read_sha1_file(actual_sha1, &type, &isize);
if (!buffer)
return NULL;
- if (!strcmp(type, required_type)) {
+ if (type == required_type) {
*size = isize;
if (actual_sha1_return)
hashcpy(actual_sha1_return, actual_sha1);
return buffer;
}
/* Handle references */
- else if (!strcmp(type, commit_type))
+ else if (type == OBJ_COMMIT)
ref_type = "tree ";
- else if (!strcmp(type, tag_type))
+ else if (type == OBJ_TAG)
ref_type = "object ";
else {
free(buffer);
@@ -1841,17 +1833,17 @@ static void *repack_object(const unsigned char *sha1, unsigned long *objsize)
z_stream stream;
unsigned char *unpacked;
unsigned long len;
- char type[20];
+ enum object_type type;
char hdr[32];
int hdrlen;
void *buf;
/* need to unpack and recompress it by itself */
- unpacked = read_packed_sha1(sha1, type, &len);
+ unpacked = read_packed_sha1(sha1, &type, &len);
if (!unpacked)
error("cannot read sha1_file for %s", sha1_to_hex(sha1));
- hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
+ hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
/* Set it up */
memset(&stream, 0, sizeof(stream));