daiduo/TurboPFor-Integer-Compression
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TurboPFor: Variable byte encode/decode

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2017-02-26 14:22:11 +01:00
parent a6843f4a64
commit fa642ee4de
1 changed files with 9 additions and 5 deletions
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14
vint.c
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@ -72,12 +72,16 @@
#define uint_t TEMPLATE3(uint, USIZE, _t)
#if VDELTA == 0
#define OVERFLOWD(in,n,out,vbmax) if(*in == vbmax) { memcpy(out, in+1, n*(USIZE/8)); return in+1+n*(USIZE/8); }
#define OVERFLOWE(in,n,out,op,vbmax) if(op > out + n*(USIZE/8)) { *out = vbmax; memcpy(out+1, in, n*(USIZE/8)); op = out+1+n*(USIZE/8); }
//#if USIZE < 64
#define OVERFLOWD(in,n,out,vbmax) if(*in == (vbmax)) { memcpy(out, in+1, n*(USIZE/8)); return in+1+n*(USIZE/8); }
#define OVERFLOWE(in,n,out,op,vbmax) if(op > out + n*(USIZE/8)) { *out = (vbmax); memcpy(out+1, in, n*(USIZE/8)); op = out+1+n*(USIZE/8); }
//#else
//#define OVERFLOWD(in,n,out,vbmax)
//#define OVERFLOWE(in,n,out,op,vbmax)
//#endif
unsigned char *TEMPLATE2(vbdec, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out) {
register uint_t x, *op;
OVERFLOWD(in, n, out, VB_MAX);
OVERFLOWD(in, n, out, VB_MAX+1);
#define VBE(_i_) TEMPLATE2(_vbget, USIZE)(in, x, op[_i_] = x)
for(op = out; op != out+(n&~(UN-1)); op += UN) {
@ -109,7 +113,7 @@ unsigned char *TEMPLATE2(vbenc, USIZE)(uint_t *__restrict in, unsigned n, unsign
TEMPLATE2(_vbput, USIZE)(op, x, ;);
}
OVERFLOWE(in,n,out,op,VB_MAX);
OVERFLOWE(in,n,out,op,VB_MAX+1);
return op;
}
#undef VBD