SYNOPSIS

void bitmap_fold(unsigned long * dst, const unsigned long * orig, int sz, int bits);

ARGUMENTS

dst

resulting smaller bitmap

orig

original larger bitmap

sz

specified size

bits

number of bits in each of these bitmaps

DESCRIPTION

For each bit oldbit in orig, set bit oldbit mod sz in dst. Clear all other bits in dst. See further the comment and Example [2] for bitmap_onto for why and how to use this.

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