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#include "lib_svmlight_format.h"
static int32_t next_occurence(char *line, int32_t start, char what)
{
int32_t i;
for(i=start; i < LIBSLF_MAXLINELEN && line[i] != '\0'; i++)
{
if(line[i] == what)
return(i);
}
return(-1);
}
int32_t svmlight_format_parse_line(char *line, int32_t *label, uint32_t *feat_idx, double *feat_val)
{
int32_t beg, end, nnzf=0;
end = next_occurence(line,0,' ');
beg = end;
if(end == -1)
return(-1);
*label = (int32_t)atol(line);
int go = 1;
while(go) {
end = next_occurence(line,beg,':');
if(end == -1)
return(nnzf);
feat_idx[nnzf] = (uint32_t)atol(&line[beg]);
beg = end + 1;
end = next_occurence(line,beg,' ');
if(end == -1) {
end = next_occurence(line,beg,'\n');
if(end == -1)
return(-1);
go = 0;
}
feat_val[nnzf] = atof(&line[beg]);
beg = end;
nnzf++;
}
return(nnzf);
}
/* difference to svmlight_format_parse_line is that here the label is float */
int32_t svmlight_format_parse_line_doubley(char *line, double *label, uint32_t *feat_idx, double *feat_val)
{
int32_t beg, end, nnzf=0;
end = next_occurence(line,0,' ');
beg = end;
if(end == -1)
return(-1);
*label = (double)atof(line);
int go = 1;
while(go) {
end = next_occurence(line,beg,':');
if(end == -1)
return(nnzf);
feat_idx[nnzf] = (uint32_t)atol(&line[beg]);
beg = end + 1;
end = next_occurence(line,beg,' ');
if(end == -1) {
end = next_occurence(line,beg,'\n');
if(end == -1)
return(-1);
go = 0;
}
feat_val[nnzf] = atof(&line[beg]);
beg = end;
nnzf++;
}
return(nnzf);
}
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