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Annotation of coherent/b/lib/libc/gen/old/notmem.c, revision 1.1.1.1

1.1       root        1: 
                      2: /*
                      3:  * Tell if this block of memory is in the malloc area
                      4:  */
                      5: 
                      6: #include <stdio.h>
                      7: #include <malloc.h>
                      8: 
                      9: extern  struct mblock  *_a_scanp;      /* first arena */
                     10: 
                     11: notmem(cp)
                     12: char *cp;
                     13: {
                     14:        register unsigned len;
                     15:        register struct mblock *ap, *ptr;
                     16:        
                     17:        if(cp == NULL || (ptr = _a_scanp) == NULL ||
                     18:          !((ap = cp - sizeof(unsigned))->blksize))
                     19:                return(1);      /* bullshit address */
                     20: 
                     21:        do {
                     22:                if(ptr == ap)
                     23:                        return(0);      /* obviously good */
                     24: 
                     25:                if(len = ptr->blksize)
                     26:                        ptr = realsize(len) + adr(ptr);
                     27:                else
                     28:                        ptr = ptr->uval.next;
                     29:        } while (ptr != _a_scanp);
                     30: 
                     31:        return(1);      /* not found is bad address */
                     32: }

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