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vsprintf: Add scnprintf from kernel 

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Markus Pargmann 2015-12-08 10:39:27 +01:00 committed by Sascha Hauer
parent 45885266f9
commit 647fba8ee3
2 changed files with 25 additions and 0 deletions
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1
include/stdio.h
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@ -13,6 +13,7 @@ void serial_printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2
int sprintf(char *buf, const char *fmt, ...) __attribute__ ((format(__printf__, 2, 3)));
int snprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
int scnprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
int vsprintf(char *buf, const char *fmt, va_list args);
char *asprintf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
char *vasprintf(const char *fmt, va_list ap);

24
lib/vsprintf.c
View File

@ -595,6 +595,30 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
}
EXPORT_SYMBOL(snprintf);
/**
* scnprintf - Format a string and place it in a buffer
* @buf: The buffer to place the result into
* @size: The size of the buffer, including the trailing null space
* @fmt: The format string to use
* @...: Arguments for the format string
*
* The return value is the number of characters written into @buf not including
* the trailing '\0'. If @size is == 0 the function returns 0.
*/
int scnprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vscnprintf(buf, size, fmt, args);
va_end(args);
return i;
}
EXPORT_SYMBOL(scnprintf);
/* Simplified asprintf. */
char *vasprintf(const char *fmt, va_list ap)
{