diff --git a/lib/fp.c b/lib/fp.c
index 35b77a2..a96da65 100644
--- a/lib/fp.c
+++ b/lib/fp.c
@@ -126,14 +126,14 @@ static unsigned char dcode[] = {0, 6,10, 14, 18, 20, 22, 24};
 //-------- TurboPFor Zigzag of zigzag for unsorted/sorted integer/floating point array ---------------------------------------
 size_t T2(p4nzzenc128v,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t        _p[VSIZE+32], *ip, *p, pd = 0;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
 
   #define FE(_i_,_usize_) { T3(uint, USIZE, _t) u = ip[_i_]; start = u-start; p[_i_] = ZZAGENC(start,pd,_usize_); pd = start; start = u; }
   for(ip = in; ip != in + (n&~(VSIZE-1)); ) {
     for(p = _p; p != &_p[VSIZE]; p+=4,ip+=4) { FE(0,USIZE); FE(1,USIZE); FE(2,USIZE); FE(3,USIZE); }
     op = T2(P4ENCV,USIZE)(_p, VSIZE, op);                                       PREFETCH(ip+512,0); if(op >= out_) goto e;
   }
-  if(n = (in+n)-ip) {
+  if((n = (in+n)-ip) != 0) {
     for(p = _p; p != &_p[n]; p++,ip++) FE(0,USIZE);
     op = T2(P4ENC,USIZE)(_p, n, op);                                            if(op >= out_) goto e;
   }
@@ -153,7 +153,7 @@ size_t T2(p4nzzdec128v,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t s
   for(op = out; op != out+(n&~(VSIZE-1)); ) {                           PREFETCH(ip+512,0);
     for(ip = T2(P4DECV,USIZE)(ip, VSIZE, _p), p = _p; p != &_p[VSIZE]; p+=4,op+=4) { FD(0,USIZE); FD(1,USIZE); FD(2,USIZE); FD(3,USIZE); }
   }
-  if(n = (out+n) - op)
+  if((n = (out+n) - op) != 0)
     for(ip = T2(P4DEC,USIZE)(ip, n, _p), p = _p; p != &_p[n]; p++,op++) FD(0,USIZE);
   return ip - in;
   #undef FD
@@ -169,7 +169,7 @@ size_t T2(p4nzzdec128v,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t s
 */
 size_t T2(fpxenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t         _p[VSIZE+32], *ip, *p;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
 
     #if defined(__AVX2__) && USIZE >= 32
   #define _mm256_set1_epi64(a) _mm256_set1_epi64x(a)
@@ -233,7 +233,7 @@ size_t T2(fpxenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start)
       #endif
     op = T2(P4ENCV,USIZE)(_p, VSIZE, op);                                                    PREFETCH(ip+512,0); if(op >= out_) goto e;
   }
-  if(n = (in+n)-ip) { uint_t b = 0;
+  if((n = (in+n)-ip) != 0) { uint_t b = 0;
     for(p = _p; p != &_p[n]; p++,ip++) FE(0,USIZE);
     b = T2(clz,USIZE)(b);
     *op++ = b;
@@ -295,7 +295,7 @@ size_t T2(fpxdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start)
     for(p = _p; p != &_p[VSIZE]; p+=4,op+=4) { FD(0,USIZE); FD(1,USIZE); FD(2,USIZE); FD(3,USIZE); }
       #endif
   }
-  if(n = (out+n) - op) {
+  if((n = (out+n) - op) != 0) {
     uint_t b = *ip++;
     for(ip = T2(P4DEC,USIZE)(ip, n, _p), p = _p; p < &_p[n]; p++,op++) FD(0,USIZE);
   }
@@ -312,7 +312,7 @@ size_t T2(fpxdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start)
 
 size_t T2(fpfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t        htab[1<<HBITS] = {0}, _p[VSIZE+32], *ip, h = 0, *p;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
 
     #if defined(__AVX2__) && USIZE >= 32
   #define _mm256_set1_epi64(a) _mm256_set1_epi64x(a)
@@ -354,7 +354,7 @@ size_t T2(fpfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start
       #endif
     op = T2(P4ENCV,USIZE)(_p, VSIZE, op);                                       PREFETCH(ip+512,0); if(op >= out_) goto e;
   }
-  if(n = (in+n)-ip) { uint_t b = 0;
+  if((n = (in+n)-ip) != 0) { uint_t b = 0;
     for(p = _p; p != &_p[n]; p++,ip++) FE(0,USIZE);
     b = T2(clz,USIZE)(b);
     *op++ = b;
@@ -380,7 +380,7 @@ size_t T2(fpfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start
      unsigned b = *ip++; ip = T2(P4DECV,USIZE)(ip, VSIZE, _p);
     for(p = _p; p != &_p[VSIZE]; p+=4,op+=4) { FD(0,USIZE); FD(1,USIZE); FD(2,USIZE); FD(3,USIZE); }
   }
-  if(n = ((uint_t *)out+n) - op) {
+  if((n = ((uint_t *)out+n) - op) != 0) {
     unsigned b = *ip++; ip = T2(P4DEC,USIZE)(ip, n, _p);
     for(p = _p; p != &_p[n]; p++,op++) FD(0,USIZE);
   }
@@ -391,7 +391,7 @@ size_t T2(fpfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start
 //-------- TurboFloat DFCM: Differential Finite Context Method Predictor ----------------------------------------------------------
 size_t T2(fpdfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t *ip, _p[VSIZE+32], h = 0, *p, htab[1<<HBITS] = {0};
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
 
   #define FE(_i_,_usize_) { T3(uint, _usize_, _t) u = ip[_i_]; p[_i_] = XORENC(u, (htab[h]+start),_usize_); b |= p[_i_]; \
     htab[h] = start = u - start; h = T2(HASH,_usize_)(h,start); start = u;\
@@ -403,7 +403,7 @@ size_t T2(fpdfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t star
     for(p = _p; p != &_p[VSIZE]; p+=4) { TR(0,USIZE); TR(1,USIZE); TR(2,USIZE); TR(3,USIZE); }
     *op++ = b; op = T2(P4ENCV,USIZE)(_p, VSIZE, op);                            PREFETCH(ip+512,0); if(op >= out_) goto e;
   }
-  if(n = (in+n)-ip) { uint_t b;
+  if((n = (in+n)-ip) != 0) { uint_t b;
     for(p = _p; p != &_p[n]; p++,ip++) FE(0,USIZE);
     b = T2(clz,USIZE)(b);
     for(p = _p; p != &_p[n]; p++) TR(0,USIZE);
@@ -429,7 +429,7 @@ size_t T2(fpdfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t star
     ip = T2(P4DECV,USIZE)(ip, VSIZE, _p);
     for(p = _p; p != &_p[VSIZE]; p+=4,op+=4) { FD(0,USIZE); FD(1,USIZE); FD(2,USIZE); FD(3,USIZE); }
   }
-  if(n = ((uint_t *)out+n) - op) {
+  if((n = ((uint_t *)out+n) - op) != 0) {
     uint_t b = *ip++;
     ip = T2(P4DEC,USIZE)(ip, n, _p);
     for(p = _p; p != &_p[n]; p++,op++) FD(0,USIZE);
@@ -441,7 +441,7 @@ size_t T2(fpdfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t star
 //-------- TurboFloat Double delta DFCM: Differential Finite Context Method Predictor ----------------------------------------------------------
 size_t T2(fp2dfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t *ip, _p[VSIZE+32], h = 0, *p, htab[1<<HBITS] = {0},start0=start; start=0;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
 
   #define FE(_i_,_usize_) { T3(uint, _usize_, _t) u = ip[_i_]; p[_i_] = XORENC(u, (htab[h]+start),_usize_); b |= p[_i_]; \
     htab[h] = start = u - start; h = T2(HASH,_usize_)(h,start); start = start0; start0 = u;\
@@ -456,7 +456,7 @@ size_t T2(fp2dfcmenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t sta
     for(p = _p; p != &_p[VSIZE]; p+=4) { TR(0,USIZE); TR(1,USIZE); TR(2,USIZE); TR(3,USIZE); }
     *op++ = b; op = T2(P4ENCV,USIZE)(_p, VSIZE, op);                            PREFETCH(ip+512,0); if(op >= out_) goto e;
   }
-  if(n = (in+n)-ip) {
+  if((n = (in+n)-ip) != 0) {
     uint_t b = 0;
     for(p = _p; p != &_p[n]; p++,ip++) FE(0,USIZE);
     b = T2(clz,USIZE)(b);
@@ -484,7 +484,7 @@ size_t T2(fp2dfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t sta
     ip = T2(P4DECV,USIZE)(ip, VSIZE, _p);
     for(p = _p; p != &_p[VSIZE]; p+=4,op+=4) { FD(0,USIZE); FD(1,USIZE); FD(2,USIZE); FD(3,USIZE); }
   }
-  if(n = ((uint_t *)out+n) - op) {
+  if((n = ((uint_t *)out+n) - op) != 0) {
     uint_t b = *ip++;
     ip = T2(P4DEC,USIZE)(ip, n, _p);
     for(p = _p; p != &_p[n]; p++,op++) FD(0,USIZE);
@@ -510,7 +510,7 @@ size_t T2(fp2dfcmdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t sta
 size_t T2(fpgenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t        *ip = in;
   unsigned       ol = 0, ot = 0;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
   bitdef(bw,br);
   if(start) { ol = T2(clz,USIZE)(start); ot = T2(ctz,USIZE)(start); }
   *op++ = 0;
@@ -561,7 +561,7 @@ size_t T2(fpgdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start)
 size_t T2(fphenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) {
   uint_t        *ip = in;
   int            ol = USIZE+1,s;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
   *op++ = 0;
   bitdef(bw,br);
   if(start) ol = T2(clz,USIZE)(start); 
@@ -636,7 +636,7 @@ size_t T2(fphdec,USIZE)(unsigned char *in, size_t n, uint_t *out, uint_t start)
 
 size_t T2(fpc0enc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) { // simple hash table
   uint_t        *ip = in;
-  unsigned char *op = out, out_ = out+n*USIZE/8;
+  unsigned char *op = out, *out_ = out+n*USIZE/8;
   unsigned      htab[1<<FX_BITS] = {0}, ol = USIZE+1; 
   bitdef(bw,br);    							//if(start) ol = T2(clz,USIZE)(start);
   
@@ -673,7 +673,7 @@ size_t T2(fpc0enc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start)
 
 size_t T2(fpcenc,USIZE)(uint_t *in, size_t n, unsigned char *out, uint_t start) { // double entry hashtable
   uint_t        *ip = in;
-  unsigned char *op = out, out_ = out+n*(USIZE/8);
+  unsigned char *op = out, *out_ = out+n*(USIZE/8);
   unsigned      htab[1<<(FX_BITS+1)] = {0}, ol = USIZE+1; 
   bitdef(bw,br);                                                  //if(start) ol = T2(clz,USIZE)(start);