From: Matt Cooper <vtbassmatt@xxxxxxxxx>
This introduces an additional guard for platforms where `unsigned long`
and `size_t` are not of the same size. If the size of an object in the
database would overflow `unsigned long`, instead we now exit with an
error.
A complete fix will have to update _many_ other functions throughout the
codebase to use `size_t` instead of `unsigned long`. It will have to be
implemented at some stage.
This commit puts in a stop-gap for the time being.
Helped-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
Signed-off-by: Matt Cooper <vtbassmatt@xxxxxxxxx>
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
delta.h | 6 +++---
object-file.c | 6 +++---
packfile.c | 6 +++---
3 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/delta.h b/delta.h
index 2df5fe13d95..8a56ec07992 100644
--- a/delta.h
+++ b/delta.h
@@ -90,15 +90,15 @@ static inline unsigned long get_delta_hdr_size(const unsigned char **datap,
const unsigned char *top)
{
const unsigned char *data = *datap;
- unsigned long cmd, size = 0;
+ size_t cmd, size = 0;
int i = 0;
do {
cmd = *data++;
- size |= (cmd & 0x7f) << i;
+ size |= st_left_shift(cmd & 0x7f, i);
i += 7;
} while (cmd & 0x80 && data < top);
*datap = data;
- return size;
+ return cast_size_t_to_ulong(size);
}
#endif
diff --git a/object-file.c b/object-file.c
index f233b440b22..70e456fc2a3 100644
--- a/object-file.c
+++ b/object-file.c
@@ -1344,7 +1344,7 @@ static int parse_loose_header_extended(const char *hdr, struct object_info *oi,
unsigned int flags)
{
const char *type_buf = hdr;
- unsigned long size;
+ size_t size;
int type, type_len = 0;
/*
@@ -1388,12 +1388,12 @@ static int parse_loose_header_extended(const char *hdr, struct object_info *oi,
if (c > 9)
break;
hdr++;
- size = size * 10 + c;
+ size = st_add(st_mult(size, 10), c);
}
}
if (oi->sizep)
- *oi->sizep = size;
+ *oi->sizep = cast_size_t_to_ulong(size);
/*
* The length must be followed by a zero byte
diff --git a/packfile.c b/packfile.c
index 755aa7aec5e..3ccea004396 100644
--- a/packfile.c
+++ b/packfile.c
@@ -1059,7 +1059,7 @@ unsigned long unpack_object_header_buffer(const unsigned char *buf,
unsigned long len, enum object_type *type, unsigned long *sizep)
{
unsigned shift;
- unsigned long size, c;
+ size_t size, c;
unsigned long used = 0;
c = buf[used++];
@@ -1073,10 +1073,10 @@ unsigned long unpack_object_header_buffer(const unsigned char *buf,
break;
}
c = buf[used++];
- size += (c & 0x7f) << shift;
+ size = st_add(size, st_left_shift(c & 0x7f, shift));
shift += 7;
}
- *sizep = size;
+ *sizep = cast_size_t_to_ulong(size);
return used;
}
--
gitgitgadget
