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extern int heap_rfirst(HP_INFO *info,unsigned char *record,int inx);
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extern int heap_rlast(HP_INFO *info,unsigned char *record,int inx);
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extern void heap_clear(HP_INFO *info);
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extern int heap_disable_indexes(HP_INFO *info);
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extern int heap_enable_indexes(HP_INFO *info);
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extern int heap_indexes_are_disabled(HP_INFO *info);