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#define alloc_root_inited(A) ((A)->min_malloc != 0)
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#define ALLOC_ROOT_MIN_BLOCK_SIZE (MALLOC_OVERHEAD + sizeof(USED_MEM) + 8)
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#define clear_alloc_root(A) do { (A)->free= (A)->used= (A)->pre_alloc= 0; (A)->min_malloc=0;} while(0)
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extern int get_defaults_options(int argc, char **argv,
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char **defaults, char **extra_defaults,