stdlib/FreeBSD/strfmon.3

   1 .\" Copyright (c) 2001 Jeroen Ruigrok van der Werven <asmodai@FreeBSD.org>
   2 .\" All rights reserved.
   3 .\"
   4 .\" Redistribution and use in source and binary forms, with or without
   5 .\" modification, are permitted provided that the following conditions
   6 .\" are met:
   7 .\" 1. Redistributions of source code must retain the above copyright
   8 .\"    notice, this list of conditions and the following disclaimer.
   9 .\" 2. Redistributions in binary form must reproduce the above copyright
  10 .\"    notice, this list of conditions and the following disclaimer in the
  11 .\"    documentation and/or other materials provided with the distribution.
  12 .\"
  13 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  14 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  17 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23 .\" SUCH DAMAGE.
  24 .\"
  25 .\" $FreeBSD: src/lib/libc/stdlib/strfmon.3,v 1.7 2003/01/06 06:21:25 tjr Exp $
  26 .\"
  27 .Dd October 12, 2002
  28 .Dt STRFMON 3
  29 .Os
  30 .Sh NAME
  31 .Nm strfmon
  32 .Nd convert monetary value to string
  33 .Sh LIBRARY
  34 .Lb libc
  35 .Sh SYNOPSIS
  36 .In monetary.h
  37 .Ft ssize_t
  38 .Fn strfmon "char * restrict s" "size_t maxsize" "const char * restrict format" "..."
  39 .Sh DESCRIPTION
  40 The
  41 .Fn strfmon
  42 function places characters into the array pointed to by
  43 .Fa s
  44 as controlled by the string pointed to by
  45 .Fa format .
  46 No more than
  47 .Fa maxsize
  48 bytes are placed into the array.
  49 .Pp
  50 The format string is composed of zero or more directives:
  51 ordinary characters (not
  52 .Cm % ) ,
  53 which are copied unchanged to the output stream; and conversion
  54 specifications, each of which results in fetching zero or more subsequent
  55 arguments.
  56 Each conversion specification is introduced by the
  57 .Cm %
  58 character.
  59 After the
  60 .Cm % ,
  61 the following appear in sequence:
  62 .Bl -bullet
  63 .It
  64 Zero or more of the following flags:
  65 .Bl -tag -width "XXX"
  66 .It Cm = Ns Ar f
  67 A
  68 .Sq Cm =
  69 character followed by another character
  70 .Ar f
  71 which is used as the numeric fill character.
  72 .It Cm ^
  73 Do not use grouping characters, regardless of the current locale default.
  74 .It Cm +
  75 Represent positive values by prefixing them with a positive sign,
  76 and negative values by prefixing them with a negative sign.
  77 This is the default.
  78 .It Cm \&(
  79 Enclose negative values in parentheses.
  80 .It Cm \&!
  81 Do not include a currency symbol in the output.
  82 .It Cm \-
  83 Left justify the result.
  84 Only valid when a field width is specified.
  85 .El
  86 .It
  87 An optional minimum field width as a decimal number.
  88 By default, there is no minimum width.
  89 .It
  90 A
  91 .Sq Cm #
  92 sign followed by a decimal number specifying the maximum
  93 expected number of digits after the radix character.
  94 .It
  95 A
  96 .Sq Cm \&.
  97 character followed by a decimal number specifying the number
  98 the number of digits after the radix character.
  99 .It
 100 One of the following conversion specifiers:
 101 .Bl -tag -width "XXX"
 102 .It Cm i
 103 The
 104 .Vt double
 105 argument is formatted as an international monetary amount.
 106 .It Cm n
 107 The
 108 .Vt double
 109 argument is formatted as a national monetary amount.
 110 .It Cm %
 111 A
 112 .Sq Li %
 113 character is written.
 114 .El
 115 .El
 116 .Sh RETURN VALUES
 117 If the total number of resulting bytes including the terminating
 118 .Dv NULL
 119 byte is not more than
 120 .Fa maxsize ,
 121 .Fn strfmon
 122 returns the number of bytes placed into the array pointed to by
 123 .Fa s ,
 124 not including the terminating
 125 .Dv NULL
 126 byte.
 127 Otherwise, \-1 is returned,
 128 the contents of the array are indeterminate,
 129 and
 130 .Va errno
 131 is set to indicate the error.
 132 .Sh ERRORS
 133 The
 134 .Fn strfmon
 135 function will fail if:
 136 .Bl -tag -width Er
 137 .It Bq Er E2BIG
 138 Conversion stopped due to lack of space in the buffer.
 139 .It Bq Er EINVAL
 140 The format string is invalid.
 141 .It Bq Er ENOMEM
 142 Not enough memory for temporary buffers.
 143 .El
 144 .Sh SEE ALSO
 145 .Xr localeconv 3
 146 .Sh STANDARDS
 147 The
 148 .Fn strfmon
 149 function
 150 conforms to
 151 .St -p1003.1-2001 .
 152 .Sh AUTHORS
 153 .An -nosplit
 154 The
 155 .Fn strfmon
 156 function was implemented by
 157 .An Alexey Zelkin Aq phantom@FreeBSD.org .
 158 .Pp
 159 This manual page was written by
 160 .An Jeroen Ruigrok van der Werven Aq asmodai@FreeBSD.org
 161 based on the standards' text.
 162 .Sh BUGS
 163 The
 164 .Fn strfmon
 165 function does not correctly handle multibyte characters in the
 166 .Fa format
 167 argument.