system_data_types.7: Add int_leastN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/system_data_types.7

@@ -406,6 +406,78 @@ and
 .IR uint N _t
 types in this page.
 .RE
+.\"------------------------------------- int_leastN_t -----------------/
+.TP
+.IR int_least N _t
+.RS
+Include:
+.IR <stdint.h> .
+Alternatively,
+.IR <inttypes.h> .
+.PP
+.IR int_least8_t ,
+.IR int_least16_t ,
+.IR int_least32_t ,
+.I int_least64_t
+.PP
+The narrowest signed integer type
+of a width of at least N bits,
+N being the value specified in its type name.
+According to the C language standard, they shall be
+capable of storing values in the range
+.RB [ INT_LEAST N _MIN ,
+.BR INT_LEAST N _MAX ],
+substituting N by the appropriate number.
+.PP
+The length modifiers for the
+.IR int_least N _t
+types for the
+.BR printf (3)
+family of functions
+are expanded by macros of the forms
+.BR PRIdLEAST N
+and
+.BR PRIiLEAST N
+(defined in
+.IR <inttypes.h> );
+resulting for example in
+.B %"PRIdLEAST64"
+or
+.B %"PRIiLEAST64"
+for printing
+.I int_least64_t
+values.
+The length modifiers for the
+.IR int_least N _t
+types for the
+.BR scanf (3)
+family of functions
+are expanded by macros of the forms
+.BR SCNdLEAST N
+and
+.BR SCNiLEAST N,
+(defined in
+.IR <inttypes.h> );
+resulting for example in
+.B %"SCNdLEAST8"
+or
+.B %"SCNiLEAST8"
+for scanning
+.I int_least8_t
+values.
+.PP
+Conforming to:
+C99 and later; POSIX.1-2001 and later.
+.PP
+See also the
+.IR int_fast N _t ,
+.IR int N _t ,
+.IR uint_fast N _t ,
+.IR uint_least N _t
+and
+.IR uint N _t
+types in this page.
+.RE
 .\"------------------------------------- intmax_t ---------------------/
 .TP
 .I intmax_t