--- printf.3.orig 2008-02-29 10:45:39.000000000 -0800
+++ printf.3 2008-02-29 12:19:06.000000000 -0800
@@ -40,39 +40,83 @@
.Dt PRINTF 3
.Os
.Sh NAME
-.Nm printf , fprintf , sprintf , snprintf , asprintf ,
-.Nm vprintf , vfprintf, vsprintf , vsnprintf , vasprintf
+.Nm asprintf ,
+.Nm fprintf ,
+.Nm printf ,
+.Nm snprintf ,
+.Nm sprintf ,
+.Nm vasprintf ,
+.Nm vfprintf,
+.Nm vprintf ,
+.Nm vsnprintf ,
+.Nm vsprintf
.Nd formatted output conversion
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In stdio.h
.Ft int
-.Fn printf "const char * restrict format" ...
+.Fo asprintf
+.Fa "char **ret"
+.Fa "const char *format" ...
+.Fc
.Ft int
-.Fn fprintf "FILE * restrict stream" "const char * restrict format" ...
+.Fo fprintf
+.Fa "FILE *restrict stream"
+.Fa "const char *restrict format" ...
+.Fc
.Ft int
-.Fn sprintf "char * restrict str" "const char * restrict format" ...
+.Fo printf
+.Fa "const char *restrict format" ...
+.Fc
.Ft int
-.Fn snprintf "char * restrict str" "size_t size" "const char * restrict format" ...
+.Fo snprintf
+.Fa "char *restrict s"
+.Fa "size_t n"
+.Fa "const char *restrict format" ...
+.Fc
.Ft int
-.Fn asprintf "char **ret" "const char *format" ...
+.Fo sprintf
+.Fa "char *restrict s"
+.Fa "const char *restrict format" ...
+.Fc
.In stdarg.h
+.In stdio.h
.Ft int
-.Fn vprintf "const char * restrict format" "va_list ap"
+.Fo vasprintf
+.Fa "char **ret"
+.Fa "const char *format"
+.Fa "va_list ap"
+.Fc
.Ft int
-.Fn vfprintf "FILE * restrict stream" "const char * restrict format" "va_list ap"
+.Fo vfprintf
+.Fa "FILE *restrict stream"
+.Fa "const char *restrict format"
+.Fa "va_list ap"
+.Fc
.Ft int
-.Fn vsprintf "char * restrict str" "const char * restrict format" "va_list ap"
+.Fo vprintf
+.Fa "const char *restrict format"
+.Fa "va_list ap"
+.Fc
.Ft int
-.Fn vsnprintf "char * restrict str" "size_t size" "const char * restrict format" "va_list ap"
+.Fo vsnprintf
+.Fa "char *restrict s"
+.Fa "size_t n"
+.Fa "const char *restrict format"
+.Fa "va_list ap"
+.Fc
.Ft int
-.Fn vasprintf "char **ret" "const char *format" "va_list ap"
+.Fo vsprintf
+.Fa "char *restrict s"
+.Fa "const char *restrict format"
+.Fa "va_list ap"
+.Fc
.Sh DESCRIPTION
The
.Fn printf
family of functions produces output according to a
-.Fa format
+.Fa format ,
as described below.
The
.Fn printf
@@ -93,7 +137,7 @@
and
.Fn vsnprintf
write to the character string
-.Fa str ;
+.Fa s ;
and
.Fn asprintf
and
@@ -101,6 +145,12 @@
dynamically allocate a new string with
.Xr malloc 3 .
.Pp
+Extended locale versions of these functions are documented in
+.Xr printf_l 3 .
+See
+.Xr xlocale 3
+for more information.
+.Pp
These functions write the output under the control of a
.Fa format
string that specifies how subsequent arguments
@@ -117,7 +167,7 @@
and
.Fn vsnprintf ,
which return the number of characters that would have been printed if the
-.Fa size
+.Fa n
were unlimited
(again, not including the final
.Ql \e0 ) .
@@ -149,14 +199,14 @@
.Fn vsnprintf
functions
will write at most
-.Fa size Ns \-1
+.Fa n Ns \-1
of the characters printed into the output string
(the
-.Fa size Ns 'th
+.Fa n Ns \'th
character then gets the terminating
.Ql \e0 ) ;
if the return value is greater than or equal to the
-.Fa size
+.Fa n
argument, the string was too short
and some of the printed characters were discarded.
The output is always null-terminated.
@@ -167,7 +217,11 @@
.Fn vsprintf
functions
effectively assume an infinite
-.Fa size .
+.Fa n .
+.Pp
+For those routines that write to a user-provided character string,
+that string and the format strings should not overlap, as the
+behavior is undefined.
.Pp
The format string is composed of zero or more directives:
ordinary
@@ -287,6 +341,20 @@
.Xr localeconv 3 .
.El
.It
+An optional separator character (
+.Cm \ , | \; | \ : | _
+) used for separating multiple values when printing an AltiVec or SSE vector,
+or other multi-value unit.
+.Pp
+NOTE: This is an extension to the
+.Fn printf
+specification.
+Behaviour of these values for
+.Fn printf
+is only defined for operating systems conforming to the
+AltiVec Technology Programming Interface Manual.
+(At time of writing this includes only Mac OS X 10.2 and later.)
+.It
An optional decimal digit string specifying a minimum field width.
If the converted value has fewer characters than the field width, it will
be padded with spaces on the left (or right, if the left-adjustment
@@ -379,6 +447,34 @@
.It Sy Modifier Ta Cm c Ta Cm s
.It Cm l No (ell) Ta Vt wint_t Ta Vt "wchar_t *"
.El
+.Pp
+The AltiVec Technology Programming Interface Manual also defines five additional length modifiers
+which can be used (in place of the conventional length modifiers) for the printing of AltiVec or SSE vectors:
+.Bl -tag -compact
+.It Cm v
+Treat the argument as a vector value, unit length will be determined by the conversion
+specifier (default = 16 8-bit units for all integer conversions,
+4 32-bit units for floating point conversions).
+.It Cm vh, hv
+Treat the argument as a vector of 8 16-bit units.
+.It Cm vl, lv
+Treat the argument as a vector of 4 32-bit units.
+.El
+.Pp
+NOTE: The vector length specifiers are extensions to the
+.Fn printf
+specification.
+Behaviour of these values for
+.Fn printf
+is only defined for operating systems conforming to the
+AltiVec Technology Programming Interface Manual.
+(At time of writing this includes only Mac OS X 10.2 and later.)
+.Pp
+As a further extension, for SSE2 64-bit units:
+.Bl -tag -compact
+.It Cm vll, llv
+Treat the argument as a vector of 2 64-bit units.
+.El
.It
A character that specifies the type of conversion to be applied.
.El
@@ -790,14 +886,11 @@
.Sh SEE ALSO
.Xr printf 1 ,
.Xr fmtcheck 3 ,
+.Xr printf_l 3 ,
.Xr scanf 3 ,
.Xr setlocale 3 ,
+.Xr stdarg 3 ,
.Xr wprintf 3
-.Rs
-.%T "The FreeBSD Security Architecture"
-.Re
-(See
-.Pa "/usr/share/doc/{to be determined}" . )
.Sh STANDARDS
Subject to the caveats noted in the
.Sx BUGS