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#include <rangecheck.h>
#include <inttypes.h>
/* does an UTF-32 string starting at "ptr" lie in buf[0..len-1]? */
int range_str4inbuf(const void* buf,size_t len,const void* stringstart) {
const uint32_t* x;
const uint32_t* y;
if (!range_ptrinbuf(buf,len,x=stringstart)) return 0;
y=(const uint32_t*)((char*)x+len);
for (; x+1<=y && *x; ++x);
return (x+1<=y);