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-rw-r--r--example/reader_util.c49
1 files changed, 0 insertions, 49 deletions
diff --git a/example/reader_util.c b/example/reader_util.c
index 62fa3046a..b1f72c650 100644
--- a/example/reader_util.c
+++ b/example/reader_util.c
@@ -2253,55 +2253,6 @@ struct ndpi_proto ndpi_workflow_process_packet(struct ndpi_workflow * workflow,
flow_risk));
}
-/* ********************************************************** */
-/* http://home.thep.lu.se/~bjorn/crc/crc32_fast.c */
-/* ********************************************************** */
-
-static uint32_t crc32_for_byte(uint32_t r) {
- int j;
- for(j = 0; j < 8; ++j)
- r = ((r & 1) ? 0 : (uint32_t)0xEDB88320L) ^ r >> 1;
- return r ^ (uint32_t)0xFF000000L;
-}
-
-/* Any unsigned integer type with at least 32 bits may be used as
- * accumulator type for fast crc32-calulation, but unsigned long is
- * probably the optimal choice for most systems. */
-typedef unsigned long accum_t;
-
-static void init_tables(uint32_t* table, uint32_t* wtable) {
- size_t i, j, k, w;
- for(i = 0; i < 0x100; ++i)
- table[i] = crc32_for_byte(i);
- for(k = 0; k < sizeof(accum_t); ++k)
- for(i = 0; i < 0x100; ++i) {
- for(j = w = 0; j < sizeof(accum_t); ++j)
- w = table[(uint8_t)(j == k? w ^ i: w)] ^ w >> 8;
- wtable[(k << 8) + i] = w ^ (k? wtable[0]: 0);
- }
-}
-
-static void __crc32(const void* data, size_t n_bytes, uint32_t* crc) {
- static uint32_t table[0x100], wtable[0x100*sizeof(accum_t)];
- size_t n_accum = n_bytes/sizeof(accum_t);
- size_t i, j;
- if(!*table)
- init_tables(table, wtable);
- for(i = 0; i < n_accum; ++i) {
- accum_t a = *crc ^ ((accum_t*)data)[i];
- for(j = *crc = 0; j < sizeof(accum_t); ++j)
- *crc ^= wtable[(j << 8) + (uint8_t)(a >> 8*j)];
- }
- for(i = n_accum*sizeof(accum_t); i < n_bytes; ++i)
- *crc = table[(uint8_t)*crc ^ ((uint8_t*)data)[i]] ^ *crc >> 8;
-}
-
-u_int32_t ethernet_crc32(const void* data, size_t n_bytes) {
- u_int32_t crc = 0;
- __crc32(data, n_bytes, &crc);
- return crc;
-}
-
/* *********************************************** */
#ifdef USE_DPDK