vprintf_s.c File Reference
#include "safe_lib.h"
Include dependency graph for vprintf_s.c:
Functions | |
| EXPORT int | vprintf_s (const char *restrict fmt, va_list ap) |
| The vprintf_s function composes a string via the format string and writes it to a FILE buffer. More... | |
Function Documentation
◆ vprintf_s()
| EXPORT int vprintf_s | ( | const char *restrict | fmt, |
| va_list | ap | ||
| ) |
The vprintf_s function composes a string via the format string and writes it to a FILE buffer.
- Note
- POSIX specifies that
errnois set on error. However, the safeclib extendedES*errors do not seterrno, only when the underlying systemvprintfcall fails,errnois set.
- Remarks
- SPECIFIED IN
- C11 standard (ISO/IEC 9899:2011): K.3.5.3.10 The vprintf_s function (p: 599-599) http://en.cppreference.com/w/c/io/vfprintf
- Parameters
-
[in] fmt format-control string [in] ap optional arguments
- Precondition
- fmt shall not be a null pointer.
- fmt shall not contain the conversion specifier n.
- None of the arguments corresponding to s is a null pointer. (not yet)
- No encoding error shall occur.
- Returns
- On success the total number of characters written is returned.
- On failure a negative number is returned.
- Return values
-
-ESNULLP when fmt is NULL pointer -EINVAL when fmt contains n -1 on some other error. errno is set then.