#include "safe_lib.h"

Include dependency graph for scanf_s.c:

Functions
EXPORT int	scanf_s (const char *restrict fmt,...)
	The `scanf_s` function reads a formatted string from stdin, and writes to a list of arguments.

Function Documentation

◆ scanf_s()

EXPORT int scanf_s	(	const char *restrict	fmt,
			... )

The scanf_s function reads a formatted string from stdin, and writes to a list of arguments.

Reaching the end of the io buffer is equivalent to reaching the end-of-file condition for fscanf.

Remarks

SPECIFIED IN

C11 standard (ISO/IEC 9899:2011): K.3.5.3.4 The scanf_s function (p: 594) http://en.cppreference.com/w/c/io/fscanf

Parameters

[in]	fmt	format-control string.
[out]	...	arguments to write to

Precondition: fmt shall 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.; c, s, and %[ conversion specifiers each expect two arguments (the usual pointer and a value of type rsize_t indicating the size of the receiving array, which may be 1 when reading with a c into a single character) and except that the following errors are detected at runtime and call the currently installed constraint handler function. (not yet)

Warning: The current implementation just does some basic argument checks and then calls the native vsscanf() libc function. Thus the s null pointer check and the two-arg versions of c, s, and %[ are not yet implemented.

Returns: Number of receiving arguments successfully assigned, or EOF if read failure occurs before the first receiving argument was assigned or if there is a runtime constraint violation.

Return values

>	0 on success, the number of arguments assigned
EOF	on error