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#ifndef GROUPINFO_H_
#define GROUPINFO_H_
#include<cstdio>
#include<cassert>
#include<vector>
class GroupInfo {
public:
GroupInfo() { m = 0; starts.clear(); gids = NULL; }
~GroupInfo() { m = 0; starts.clear(); if (gids != NULL) delete[] gids; }
void load(const char*);
int getm() const { return m; }
int gidAt(int sid) const {
assert(sid > 0 && sid < starts.back());
return gids[sid];
}
// sp : start position
int spAt(int gid) const {
assert(gid >= 0 && gid <= m);
return starts[gid];
}
private:
int m; // m genes
std::vector<int> starts; // genes' start positions
int *gids; // hash
};
void GroupInfo::load(const char* groupF) {
FILE *fi = fopen(groupF, "r");
int pos;
if (fi == NULL) { fprintf(stderr, "Cannot open %s! It may not exist.\n", groupF); exit(-1); }
starts.clear();
while(fscanf(fi, "%d", &pos) == 1) {
starts.push_back(pos);
}
fclose(fi);
m = starts.size() - 1;
gids = new int[starts.back()];
for (int i = 0; i < m; i++) {
for (int j = starts[i]; j < starts[i + 1]; j++) {
gids[j] = i;
}
}
}
#endif /* GROUPINFO_H_ */
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