#define PERL_NO_GET_CONTEXT
#define NO_XSLOCKS
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "damerau-int.c"
#define MAX(a,b) (((a)>(b))?(a):(b))
/* use the system malloc and free */
#undef malloc
#undef free
MODULE = Text::Levenshtein::Damerau::XS PACKAGE = Text::Levenshtein::Damerau::XS
PROTOTYPES: ENABLE
void
cxs_edistance (arraySource, arrayTarget, maxDistance)
AV * arraySource
AV * arrayTarget
SV * maxDistance
PPCODE:
{
dXSTARG;
PUSHs(TARG);
PUTBACK;
{
unsigned int i,j;
unsigned int lenSource = av_len(arraySource)+1;
unsigned int lenTarget = av_len(arrayTarget)+1;
int retval;
//char *packedSource;
//char type = 'U';
//packedSource = SvPVX(arraySource);
//PUTBACK;
//unpackstring(type, type+1, packedSource, packedSource + SvCUR(arraySource), 0);
//SPAGAIN;
if(lenSource > 0 && lenTarget > 0) {
int matchBool;
unsigned int srctgt_max = MAX(lenSource,lenTarget);
if(lenSource != lenTarget)
matchBool = 0;
else matchBool = 1;
{
/* Convert Perl array to C array */
int * arrTarget = alloca(sizeof(int) * lenTarget );
int * arrSource = alloca(sizeof(int) * lenSource );
for (i=0; i < srctgt_max; i++) {
if(i < lenSource) {
SV* elem = sv_2mortal(av_shift(arraySource));
arrSource[ i ] = (int)SvIV((SV *)elem);
}
if(i < lenTarget) {
SV* elem2 = sv_2mortal(av_shift(arrayTarget));
arrTarget[ i ] = (int)SvIV((SV *)elem2);
/* checks for match */
if(matchBool && i < lenSource)
if(arrSource[i] != arrTarget[i])
matchBool = 0;
}
}
if(matchBool == 1)
retval = 0;
else
retval = distance(arrSource,arrTarget,lenSource,lenTarget,SvIV(maxDistance));
}
}
else {
/* handle a blank string */
retval = (lenSource>lenTarget)?lenSource:lenTarget;
}
sv_setiv_mg(TARG, retval);
return; /*we did a PUTBACK earlier, do not let xsubpp's PUTBACK run */
}
}