mirror of /home/gitosis/repositories/libowfat.git
21 lines
664 B
C
21 lines
664 B
C
#include <rangecheck.h>
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#include <safemult.h>
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/* does an array of "elements" members of size "membersize" starting at
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* "arraystart" lie inside buf1[0..len-1]? */
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int range_arrayinbuf(const void* buf1,size_t len,
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const void* arraystart,size_t elements,size_t membersize) {
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size_t alen;
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if (sizeof(alen)==8) {
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uint64 x;
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if (!umult64(elements,membersize,&x)) return 0;
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alen=x;
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} else {
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unsigned long long t=(unsigned long long)elements*membersize;
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alen=t; /* this strips the upper 32 bits of t */
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if (alen!=t) return 0; /* if that changes something, we overflowed */
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}
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return range_bufinbuf(buf1,len,arraystart,alen);
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}
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