/****************************************************************************
**
*A collect_gen_word.c ANUPQ source Eamonn O'Brien
**
*Y Copyright 1995-2001, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany
*Y Copyright 1995-2001, School of Mathematical Sciences, ANU, Australia
**
*/
#include "pq_defs.h"
#include "pcp_vars.h"
/* collect the defining generator word whose base address
is ptr and whose length is length to the storage location
referenced by cp */
void collect_gen_word(int ptr, int length, int cp, struct pcp_vars *pcp)
{
register int *y = y_address;
register int gen;
register int exp = y[ptr + 1];
register int entry;
register int gen_val;
for (entry = 2; entry <= length; ++entry) {
gen = y[ptr + entry];
/* check for illegal defining generators */
if (abs(gen) > pcp->ndgen || gen == 0)
report_error(0, gen, 0);
gen_val = y[pcp->dgen + gen];
if (gen < 0 && gen_val == 1)
report_error(0, gen, 0);
collect(gen_val, cp, pcp);
}
calculate_power(exp, cp + 2 * pcp->lastg + 1, cp, pcp);
}
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