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#ifndef STDIO_IMPL_H
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#define STDIO_IMPL_H
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#include <ctype.h>
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#include <stdarg.h>
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typedef struct {
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int (*f)(void *, char const *, int);
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void *arg;
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} FILE;
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int vfprintf(FILE *restrict f, const char *restrict fmt, va_list ap);
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int printf(char const *fmt, ...);
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#endif
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