stdio.h File Reference

#include <stdint.h>
#include <stdarg.h>

Go to the source code of this file.

Defines
#define	sprintf(buf, fmt,...)   snprintf ( (buf), ~( ( size_t ) 0 ), (fmt), ## __VA_ARGS__ )
	Write a formatted string to a buffer.
Functions
	FILE_LICENCE (GPL2_OR_LATER)
int	__attribute__ ((format(printf, 1, 2))) printf(const char *fmt
int int	__attribute__ ((format(printf, 3, 4))) snprintf(char *buf
int int size_t const char int	__attribute__ ((format(printf, 2, 3))) asprintf(char **strp
int int size_t const char int const char int	vprintf (const char *fmt, va_list args)
	Write a formatted string to the console.
int	vsnprintf (char *buf, size_t size, const char *fmt, va_list args)
	Write a formatted string to a buffer.
int	vasprintf (char **strp, const char *fmt, va_list args)
	Write a formatted string to newly allocated memory.
static int	vsprintf (char *buf, const char *fmt, va_list args)
	Write a formatted string to a buffer.
Variables
int int size_t	size
int int size_t const char *	fmt

---

Define Documentation

#define sprintf	(	buf,
		fmt,
		...		)	snprintf ( (buf), ~( ( size_t ) 0 ), (fmt), ## __VA_ARGS__ )

Write a formatted string to a buffer.

Parameters:

	buf	Buffer into which to write the string
	fmt	Format string
	...	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Definition at line 32 of file stdio.h.

Referenced by eth_ntoa(), imgfill_cmdline(), inet6_ntoa(), inet_ntoa(), isa_id_string(), and uuid_ntoa().

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

int __attribute__

(

(format(printf, 1, 2))

)

const

int int __attribute__

(

(format(printf, 3, 4))

)

int int size_t const char int __attribute__

(

(format(printf, 2, 3))

)

Type Constraints

int int size_t const char int const char int vprintf	(	const char *	fmt,
		va_list	args
	)

Write a formatted string to the console.

Parameters:

	fmt	Format string
	args	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Type Constraints

Definition at line 400 of file vsprintf.c.

References printf_context::handler, printf_putchar(), and vcprintf().

Referenced by printf().

                                              {
        struct printf_context ctx;

        /* Hand off to vcprintf */
        ctx.handler = printf_putchar;   
        return vcprintf ( &ctx, fmt, args );    
}

int vsnprintf	(	char *	buf,
		size_t	size,
		const char *	fmt,
		va_list	args
	)

Write a formatted string to a buffer.

Parameters:

	buf	Buffer into which to write the string
	size	Size of buffer
	fmt	Format string
	args	Arguments corresponding to the format string

Return values:

len

Length of formatted string

If the buffer is too small to contain the string, the returned length is the length that would have been written had enough space been available.

Definition at line 302 of file vsprintf.c.

References sputc_context::buf, sputc_context::ctx, printf_context::handler, sputc_context::max_len, printf_sputc(), and vcprintf().

Referenced by snprintf(), vasprintf(), vmsg(), vsprintf(), vssnprintf(), and xfer_vprintf().

                                                                        {
        struct sputc_context sctx;
        size_t len;
        size_t end;

        /* Hand off to vcprintf */
        sctx.ctx.handler = printf_sputc;
        sctx.buf = buf;
        sctx.max_len = size;
        len = vcprintf ( &sctx.ctx, fmt, args );

        /* Add trailing NUL */
        if ( size ) {
                end = size - 1;
                if ( len < end )
                        end = len;
                buf[end] = '\0';
        }

        return len;
}

int vasprintf	(	char **	strp,
		const char *	fmt,
		va_list	args
	)

Write a formatted string to newly allocated memory.

Parameters:

	strp	Pointer to hold allocated string
	fmt	Format string
	args	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Definition at line 17 of file asprintf.c.

References ENOMEM, malloc(), NULL, va_copy, va_end, and vsnprintf().

Referenced by asprintf().

                                                             {
        size_t len;
        va_list args_tmp;

        /* Calculate length needed for string */
        va_copy ( args_tmp, args );
        len = ( vsnprintf ( NULL, 0, fmt, args_tmp ) + 1 );
        va_end ( args_tmp );

        /* Allocate and fill string */
        *strp = malloc ( len );
        if ( ! *strp )
                return -ENOMEM;
        return vsnprintf ( *strp, len, fmt, args );
}

static int vsprintf	(	char *	buf,
		const char *	fmt,
		va_list	args
	)			[inline, static]

Write a formatted string to a buffer.

Parameters:

	buf	Buffer into which to write the string
	fmt	Format string
	args	Arguments corresponding to the format string

Return values:

len

Length of formatted string

Definition at line 43 of file stdio.h.

References vsnprintf().

                                                                        {
        return vsnprintf ( buf, ~( ( size_t ) 0 ), fmt, args );
}

---

Variable Documentation

int int size_t size

Definition at line 13 of file stdio.h.

Referenced by ath5k_copy_channels(), ath5k_hw_rfgain_init(), atl1e_setup_ring_resources(), e1000_init_nvm_params_82541(), e1000e_init_nvm_params_80003es2lan(), e1000e_init_nvm_params_82571(), ib_srp_parse_byte_string(), igb_init_nvm_params_82575(), meme820(), multiboot_build_memmap(), net80211_rx_frag(), pci_bar_size(), relocate(), RSA_decrypt(), and sky2_rx_start().

int int size_t const char int const char* fmt

Definition at line 13 of file stdio.h.