libbb: introduce and use common crc32 routine

function                                             old     new   delta
crc32_block_endian1                                    -      37     +37
crc32_block_endian0                                    -      34     +34
global_crc32_table                                     -       8      +8
file_read                                             82      87      +5
gzip_main                                            211     214      +3
xz_crc32                                              40      35      -5
crc32_table                                            8       -      -8
calculate_gunzip_crc                                  54      34     -20
lzo_crc32                                             54      25     -29
cksum_main                                           298     211     -87
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 2/4 up/down: 87/-149)           Total: -62 bytes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/miscutils/flash_eraseall.c b/miscutils/flash_eraseall.c
index 53aad3d52..b832cc1dd 100644
--- a/miscutils/flash_eraseall.c
+++ b/miscutils/flash_eraseall.c
@@ -42,15 +42,6 @@ but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
 #define cpu_to_je16(v) ((jint16_t){(v)})
 #define cpu_to_je32(v) ((jint32_t){(v)})
 
-static uint32_t crc32(uint32_t val, const void *ss, int len,
-                uint32_t *crc32_table)
-{
-        const unsigned char *s = ss;
-        while (--len >= 0)
-                val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
-        return val;
-}
-
 static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
 {
         printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
@@ -131,8 +122,9 @@ int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
                         cleanmarker.totlen = cpu_to_je32(8);
                 }
 
-                cleanmarker.hdr_crc = cpu_to_je32(crc32(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4,
-                                        crc32_table));
+                cleanmarker.hdr_crc = cpu_to_je32(
+                        crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
+                );
         }
 
         /* Don't want to destroy progress indicator by bb_error_msg's */