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authorRafał Miłecki <rafal@milecki.pl>2017-11-13 23:07:45 +0100
committerRafał Miłecki <rafal@milecki.pl>2017-11-14 22:33:19 +0100
commitc6761e7c8e5d0d33e2f266c297b403f337f93c6b (patch)
treec238911bee00356ebde1cdd795183ee89469c22e /package/utils/otrx/src/otrx.c
parent31ebbe34ccc066c212ef20de0856ab3a428fb801 (diff)
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otrx: use helper function when checking image's CRC32
This requires changing this helper to accept initial/current CRC32 value as argument but it allows dropping duplicated (complex?) code calculating the CRC32. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'package/utils/otrx/src/otrx.c')
-rw-r--r--package/utils/otrx/src/otrx.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c
index 101a31004d..7b02977abb 100644
--- a/package/utils/otrx/src/otrx.c
+++ b/package/utils/otrx/src/otrx.c
@@ -124,9 +124,7 @@ static const uint32_t crc32_tbl[] = {
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
-uint32_t otrx_crc32(uint8_t *buf, size_t len) {
- uint32_t crc = 0xffffffff;
-
+uint32_t otrx_crc32(uint32_t crc, uint8_t *buf, size_t len) {
while (len) {
crc = crc32_tbl[(crc ^ *buf) & 0xff] ^ (crc >> 8);
buf++;
@@ -158,7 +156,6 @@ static int otrx_check(int argc, char **argv) {
size_t bytes, length;
uint8_t buf[1024];
uint32_t crc32;
- int i;
int err = 0;
if (argc < 3) {
@@ -203,8 +200,7 @@ static int otrx_check(int argc, char **argv) {
fseek(trx, trx_offset + TRX_FLAGS_OFFSET, SEEK_SET);
length -= TRX_FLAGS_OFFSET;
while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
- for (i = 0; i < bytes; i++)
- crc32 = crc32_tbl[(crc32 ^ buf[i]) & 0xff] ^ (crc32 >> 8);
+ crc32 = otrx_crc32(crc32, buf, bytes);
length -= bytes;
}
@@ -316,7 +312,7 @@ static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
return -ENOMEM;
}
- crc32 = otrx_crc32(buf + TRX_FLAGS_OFFSET, length - TRX_FLAGS_OFFSET);
+ crc32 = otrx_crc32(0xffffffff, buf + TRX_FLAGS_OFFSET, length - TRX_FLAGS_OFFSET);
hdr->crc32 = cpu_to_le32(crc32);
fseek(trx, 0, SEEK_SET);