gv_ftell.h

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#pragma once
 
#include <assert.h>
#include <stddef.h>
#include <stdio.h>
 
static inline size_t gv_ftell(FILE *stream) {
  assert(stream != NULL);
 
#ifdef _WIN32
  // on Windows, `long` is 32 bits so `ftell` cannot report >2GB file sizes
  return (size_t)_ftelli64(stream);
#endif
 
  return (size_t)ftell(stream);
}