Signed-off-by: Alejandro Colomar <colomar.6.4.3@xxxxxxxxx> --- man7/system_data_types.7 | 80 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/man7/system_data_types.7 b/man7/system_data_types.7 index c5d0b700d..c130b7256 100644 --- a/man7/system_data_types.7 +++ b/man7/system_data_types.7 @@ -1348,6 +1348,86 @@ See also: .BR getpwnam (2), .BR credentials (7) .RE +.\"------------------------------------- uint_fastN_t -----------------/ +.TP +.IR uint_fast N _t +.RS +Include: +.IR <stdint.h> . +Alternatively, +.IR <inttypes.h> . +.PP +.IR uint_fast8_t , +.IR uint_fast16_t , +.IR uint_fast32_t , +.I uint_fast64_t +.PP +Usually the fastest (see Notes) unsigned 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 [0, +.BR UINT_FAST N _MAX ], +substituting N by the appropriate number. +.PP +The length modifiers for the +.IR uint_fast N _t +types for the +.BR printf (3) +family of functions +are expanded by macros of the forms +.BR PRIuFAST N, +.BR PRIoFAST N, +.BR PRIxFAST N +and +.BR PRIXFAST N +(defined in +.IR <inttypes.h> ); +resulting for example in +.B %"PRIuFAST32" +or +.B %"PRIxFAST32" +for printing +.I uint_fast32_t +values. +The length modifiers for the +.IR uint_fast N _t +types for the +.BR scanf (3) +family of functions +are expanded by macros of the forms +.BR SCNuFAST N, +.BR SCNoFAST N, +.BR SCNxFAST N +and +.BR SCNXFAST N +(defined in +.IR <inttypes.h> ); +resulting for example in +.B %"SCNuFAST16" +or +.B %"SCNxFAST16" +for scanning +.I uint_fast16_t +values. +.PP +Conforming to: +C99 and later; POSIX.1-2001 and later. +.PP +Notes: +Where there is no single type that is fastest for all purposes, +the implementation may choose any type +with the required signedness and at least the minimum width. +.PP +See also the +.IR int_fast N _t , +.IR int_least N _t , +.IR int N _t , +.IR uint_least N _t +and +.IR uint N _t +types in this page. +.RE .\"------------------------------------- uintmax_t --------------------/ .TP .I uintmax_t -- 2.28.0
