summaryrefslogtreecommitdiff
path: root/archival/unzip.c
diff options
context:
space:
mode:
authorRob Landley2006-07-16 08:14:35 +0000
committerRob Landley2006-07-16 08:14:35 +0000
commit534374755d618c9c36c9940c82756241c4b25a67 (patch)
treefac906b4fa40a68c53cecf20215a7a25b3b1cab6 /archival/unzip.c
parentafb94ecf2bb6c53ce2a381d6ce45a426243c76d9 (diff)
downloadbusybox-534374755d618c9c36c9940c82756241c4b25a67.zip
busybox-534374755d618c9c36c9940c82756241c4b25a67.tar.gz
Cleaup read() and write() variants, plus a couple of new functions like
xlseek and fdlength() for the new mkswap.
Diffstat (limited to 'archival/unzip.c')
-rw-r--r--archival/unzip.c61
1 files changed, 17 insertions, 44 deletions
diff --git a/archival/unzip.c b/archival/unzip.c
index 8ba39e9..632cc85 100644
--- a/archival/unzip.c
+++ b/archival/unzip.c
@@ -32,28 +32,10 @@
#include "unarchive.h"
#include "busybox.h"
-#if BB_BIG_ENDIAN
-static inline unsigned short
-__swap16(unsigned short x) {
- return (((uint16_t)(x) & 0xFF) << 8) | (((uint16_t)(x) & 0xFF00) >> 8);
-}
-
-static inline uint32_t
-__swap32(uint32_t x) {
- return (((x & 0xFF) << 24) |
- ((x & 0xFF00) << 8) |
- ((x & 0xFF0000) >> 8) |
- ((x & 0xFF000000) >> 24));
-}
-#else /* it's little-endian */
-# define __swap16(x) (x)
-# define __swap32(x) (x)
-#endif /* BB_BIG_ENDIAN */
-
-#define ZIP_FILEHEADER_MAGIC __swap32(0x04034b50)
-#define ZIP_CDS_MAGIC __swap32(0x02014b50)
-#define ZIP_CDS_END_MAGIC __swap32(0x06054b50)
-#define ZIP_DD_MAGIC __swap32(0x08074b50)
+#define ZIP_FILEHEADER_MAGIC SWAP_LE32(0x04034b50)
+#define ZIP_CDS_MAGIC SWAP_LE32(0x02014b50)
+#define ZIP_CDS_END_MAGIC SWAP_LE32(0x06054b50)
+#define ZIP_DD_MAGIC SWAP_LE32(0x08074b50)
extern unsigned int gunzip_crc;
extern unsigned int gunzip_bytes_out;
@@ -83,13 +65,6 @@ static void unzip_skip(int fd, off_t skip)
}
}
-static void unzip_read(int fd, void *buf, size_t count)
-{
- if (bb_xread(fd, buf, count) != count) {
- bb_error_msg_and_die(bb_msg_read_error);
- }
-}
-
static void unzip_create_leading_dirs(char *fn)
{
/* Create all leading directories */
@@ -248,7 +223,7 @@ int unzip_main(int argc, char **argv)
unsigned int magic;
/* Check magic number */
- unzip_read(src_fd, &magic, 4);
+ xread(src_fd, &magic, 4);
if (magic == ZIP_CDS_MAGIC) {
break;
} else if (magic != ZIP_FILEHEADER_MAGIC) {
@@ -256,19 +231,17 @@ int unzip_main(int argc, char **argv)
}
/* Read the file header */
- unzip_read(src_fd, zip_header.raw, 26);
-#if BB_BIG_ENDIAN
- zip_header.formated.version = __swap16(zip_header.formated.version);
- zip_header.formated.flags = __swap16(zip_header.formated.flags);
- zip_header.formated.method = __swap16(zip_header.formated.method);
- zip_header.formated.modtime = __swap16(zip_header.formated.modtime);
- zip_header.formated.moddate = __swap16(zip_header.formated.moddate);
- zip_header.formated.crc32 = __swap32(zip_header.formated.crc32);
- zip_header.formated.cmpsize = __swap32(zip_header.formated.cmpsize);
- zip_header.formated.ucmpsize = __swap32(zip_header.formated.ucmpsize);
- zip_header.formated.filename_len = __swap16(zip_header.formated.filename_len);
- zip_header.formated.extra_len = __swap16(zip_header.formated.extra_len);
-#endif /* BB_BIG_ENDIAN */
+ xread(src_fd, zip_header.raw, 26);
+ zip_header.formated.version = SWAP_LE32(zip_header.formated.version);
+ zip_header.formated.flags = SWAP_LE32(zip_header.formated.flags);
+ zip_header.formated.method = SWAP_LE32(zip_header.formated.method);
+ zip_header.formated.modtime = SWAP_LE32(zip_header.formated.modtime);
+ zip_header.formated.moddate = SWAP_LE32(zip_header.formated.moddate);
+ zip_header.formated.crc32 = SWAP_LE32(zip_header.formated.crc32);
+ zip_header.formated.cmpsize = SWAP_LE32(zip_header.formated.cmpsize);
+ zip_header.formated.ucmpsize = SWAP_LE32(zip_header.formated.ucmpsize);
+ zip_header.formated.filename_len = SWAP_LE32(zip_header.formated.filename_len);
+ zip_header.formated.extra_len = SWAP_LE32(zip_header.formated.extra_len);
if ((zip_header.formated.method != 0) && (zip_header.formated.method != 8)) {
bb_error_msg_and_die("Unsupported compression method %d", zip_header.formated.method);
}
@@ -276,7 +249,7 @@ int unzip_main(int argc, char **argv)
/* Read filename */
free(dst_fn);
dst_fn = xzalloc(zip_header.formated.filename_len + 1);
- unzip_read(src_fd, dst_fn, zip_header.formated.filename_len);
+ xread(src_fd, dst_fn, zip_header.formated.filename_len);
/* Skip extra header bytes */
unzip_skip(src_fd, zip_header.formated.extra_len);