diff options
Diffstat (limited to 'src/hash/crc.c')
| -rw-r--r-- | src/hash/crc.c | 84 |
1 files changed, 42 insertions, 42 deletions
diff --git a/src/hash/crc.c b/src/hash/crc.c index e1433bd..c3be7f3 100644 --- a/src/hash/crc.c +++ b/src/hash/crc.c @@ -9,81 +9,81 @@ int crc16_free_l(lua_State* L){return 0;} int crc8_free_l(lua_State* L){return 0;}
struct crc32_hash crc32_init(){
- return (struct crc32_hash){.crc = 0xFFFFFFFF};
+ return (struct crc32_hash){.crc = 0xFFFFFFFF};
}
void crc32_update(uint8_t* data, size_t len, struct crc32_hash* hash){
- for(int i = 0; i < len; i++){
- uint32_t extract = data[i];
- for(int z = 0; z < 8; z++){
- uint32_t b = (extract^hash->crc)&1;
- hash->crc>>=1;
- if(b) hash->crc^=0xEDB88320;
- extract>>=1;
- }
+ for(int i = 0; i < len; i++){
+ uint32_t extract = data[i];
+ for(int z = 0; z < 8; z++){
+ uint32_t b = (extract^hash->crc)&1;
+ hash->crc>>=1;
+ if(b) hash->crc^=0xEDB88320;
+ extract>>=1;
}
+ }
}
uint32_t crc32_final(struct crc32_hash* hash){
- return -(hash->crc+1);
+ return -(hash->crc+1);
}
uint32_t crc32(uint8_t* data, size_t len){
- struct crc32_hash a = crc32_init();
- crc32_update(data, len, &a);
- return crc32_final(&a);
+ struct crc32_hash a = crc32_init();
+ crc32_update(data, len, &a);
+ return crc32_final(&a);
}
struct crc16_hash crc16_init(){
- return (struct crc16_hash){.crc = 0x0};
+ return (struct crc16_hash){.crc = 0x0};
}
void crc16_update(uint8_t *aa, size_t len, struct crc16_hash *hash){
- for(int i = 0; i != len; i++){
- uint8_t a = aa[i];
- hash->crc ^= a;
- for (int z = 0; z < 8; z++){
- if (hash->crc & 1) hash->crc = (hash->crc >> 1) ^ 0xA001;
- else hash->crc = (hash->crc >> 1);
- }
+ for(int i = 0; i != len; i++){
+ uint8_t a = aa[i];
+ hash->crc ^= a;
+ for (int z = 0; z < 8; z++){
+ if (hash->crc & 1) hash->crc = (hash->crc >> 1) ^ 0xA001;
+ else hash->crc = (hash->crc >> 1);
}
+ }
}
uint16_t crc16_final(struct crc16_hash *hash){
- return hash->crc;
+ return hash->crc;
}
uint16_t crc16(uint8_t *aa, size_t len){
- struct crc16_hash a = crc16_init();
- crc16_update(aa, len, &a);
- return crc16_final(&a);
+ struct crc16_hash a = crc16_init();
+ crc16_update(aa, len, &a);
+ return crc16_final(&a);
}
struct crc8_hash crc8_init(){
- return (struct crc8_hash){.crc = 0x00};
+ return (struct crc8_hash){.crc = 0x00};
}
void crc8_update(uint8_t *aa, size_t len, struct crc8_hash *hash){
- for(int i = 0; i != len; i++){
- uint8_t a = aa[i];
-
- for (int z = 0; z < 8; z++){
- uint8_t b = (hash->crc ^ a) & 1;
- hash->crc >>= 1;
- if(b) hash->crc ^= 0x8c;
- a >>=1;
- }
+ for(int i = 0; i != len; i++){
+ uint8_t a = aa[i];
+
+ for (int z = 0; z < 8; z++){
+ uint8_t b = (hash->crc ^ a) & 1;
+ hash->crc >>= 1;
+ if(b) hash->crc ^= 0x8c;
+ a >>=1;
}
+ }
}
uint8_t crc8_final(struct crc8_hash *hash){
- return hash->crc;
+ return hash->crc;
}
uint8_t crc8(uint8_t *aa, size_t len){
- struct crc8_hash a = crc8_init();
- crc8_update(aa, len, &a);
- return crc8_final(&a);
+ struct crc8_hash a = crc8_init();
+ crc8_update(aa, len, &a);
+ return crc8_final(&a);
}
common_hash_clone(crc32);
@@ -125,7 +125,7 @@ int l_crc8(lua_State* L){ if(lua_gettop(L) == 0) return l_crc8_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
-
+
char digest[8];
uint8_t u = crc8(a, len);
@@ -139,7 +139,7 @@ int l_crc16(lua_State* L){ if(lua_gettop(L) == 0) return l_crc16_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
-
+
char digest[16];
uint16_t u = crc16(a, len);
@@ -153,7 +153,7 @@ int l_crc32(lua_State* L){ if(lua_gettop(L) == 0) return l_crc32_init(L);
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
-
+
char digest[32];
uint32_t u = crc32(a, len);
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