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#include <rangecheck.h>
/* does an ASCIIZ string starting at "ptr" lie in buf[0..len-1]? */
int range_strinbuf(const void* buf,size_t len,const void* stringstart) {
const char* x;
const char* y;
if (!range_ptrinbuf(buf,len,x=stringstart)) return 0;
y=x+len;
for (; x<y && *x; ++x);
return (x<y);
}