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129 | .\" ======================================================================== | |
130 | .\" | |
131 | .IX Title "Locale::Currency 3" | |
132 | .TH Locale::Currency 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide" | |
133 | .SH "NAME" | |
134 | Locale::Currency \- ISO three letter codes for currency identification (ISO 4217) | |
135 | .SH "SYNOPSIS" | |
136 | .IX Header "SYNOPSIS" | |
137 | .Vb 1 | |
138 | \& use Locale::Currency; | |
139 | .Ve | |
140 | .PP | |
141 | .Vb 2 | |
142 | \& $curr = code2currency('usd'); # $curr gets 'US Dollar' | |
143 | \& $code = currency2code('Euro'); # $code gets 'eur' | |
144 | .Ve | |
145 | .PP | |
146 | .Vb 2 | |
147 | \& @codes = all_currency_codes(); | |
148 | \& @names = all_currency_names(); | |
149 | .Ve | |
150 | .SH "DESCRIPTION" | |
151 | .IX Header "DESCRIPTION" | |
152 | The \f(CW\*(C`Locale::Currency\*(C'\fR module provides access to the \s-1ISO\s0 three-letter | |
153 | codes for identifying currencies and funds, as defined in \s-1ISO\s0 4217. | |
154 | You can either access the codes via the \*(L"conversion routines\*(R" | |
155 | (described below), | |
156 | or with the two functions which return lists of all currency codes or | |
157 | all currency names. | |
158 | .PP | |
159 | There are two special codes defined by the standard which aren't | |
160 | understood by this module: | |
161 | .IP "\s-1XTS\s0" 4 | |
162 | .IX Item "XTS" | |
163 | Specifically reserved for testing purposes. | |
164 | .IP "\s-1XXX\s0" 4 | |
165 | .IX Item "XXX" | |
166 | For transactions where no currency is involved. | |
167 | .SH "CONVERSION ROUTINES" | |
168 | .IX Header "CONVERSION ROUTINES" | |
169 | There are two conversion routines: \f(CW\*(C`code2currency()\*(C'\fR and \f(CW\*(C`currency2code()\*(C'\fR. | |
170 | .IP "\fIcode2currency()\fR" 4 | |
171 | .IX Item "code2currency()" | |
172 | This function takes a three letter currency code and returns a string | |
173 | which contains the name of the currency identified. If the code is | |
174 | not a valid currency code, as defined by \s-1ISO\s0 4217, then \f(CW\*(C`undef\*(C'\fR | |
175 | will be returned. | |
176 | .Sp | |
177 | .Vb 1 | |
178 | \& $curr = code2currency($code); | |
179 | .Ve | |
180 | .IP "\fIcurrency2code()\fR" 4 | |
181 | .IX Item "currency2code()" | |
182 | This function takes a currency name and returns the corresponding | |
183 | three letter currency code, if such exists. | |
184 | If the argument could not be identified as a currency name, | |
185 | then \f(CW\*(C`undef\*(C'\fR will be returned. | |
186 | .Sp | |
187 | .Vb 1 | |
188 | \& $code = currency2code('French Franc'); | |
189 | .Ve | |
190 | .Sp | |
191 | The case of the currency name is not important. | |
192 | See the section \*(L"\s-1KNOWN\s0 \s-1BUGS\s0 \s-1AND\s0 \s-1LIMITATIONS\s0\*(R" below. | |
193 | .SH "QUERY ROUTINES" | |
194 | .IX Header "QUERY ROUTINES" | |
195 | There are two function which can be used to obtain a list of all | |
196 | currency codes, or all currency names: | |
197 | .ie n .IP """all_currency_codes()""" 4 | |
198 | .el .IP "\f(CWall_currency_codes()\fR" 4 | |
199 | .IX Item "all_currency_codes()" | |
200 | Returns a list of all three-letter currency codes. | |
201 | The codes are guaranteed to be all lower\-case, | |
202 | and not in any particular order. | |
203 | .ie n .IP """all_currency_names()""" 4 | |
204 | .el .IP "\f(CWall_currency_names()\fR" 4 | |
205 | .IX Item "all_currency_names()" | |
206 | Returns a list of all currency names for which there is a corresponding | |
207 | three-letter currency code. The names are capitalised, and not returned | |
208 | in any particular order. | |
209 | .SH "EXAMPLES" | |
210 | .IX Header "EXAMPLES" | |
211 | The following example illustrates use of the \f(CW\*(C`code2currency()\*(C'\fR function. | |
212 | The user is prompted for a currency code, and then told the corresponding | |
213 | currency name: | |
214 | .PP | |
215 | .Vb 1 | |
216 | \& $| = 1; # turn off buffering | |
217 | .Ve | |
218 | .PP | |
219 | .Vb 11 | |
220 | \& print "Enter currency code: "; | |
221 | \& chop($code = <STDIN>); | |
222 | \& $curr = code2currency($code); | |
223 | \& if (defined $curr) | |
224 | \& { | |
225 | \& print "$code = $curr\en"; | |
226 | \& } | |
227 | \& else | |
228 | \& { | |
229 | \& print "'$code' is not a valid currency code!\en"; | |
230 | \& } | |
231 | .Ve | |
232 | .SH "KNOWN BUGS AND LIMITATIONS" | |
233 | .IX Header "KNOWN BUGS AND LIMITATIONS" | |
234 | .IP "\(bu" 4 | |
235 | In the current implementation, all data is read in when the | |
236 | module is loaded, and then held in memory. | |
237 | A lazy implementation would be more memory friendly. | |
238 | .IP "\(bu" 4 | |
239 | This module also includes the special codes which are | |
240 | not for a currency, such as Gold, Platinum, etc. | |
241 | This might cause a problem if you're using this module | |
242 | to display a list of currencies. | |
243 | Let Neil know if this does cause a problem, and we can | |
244 | do something about it. | |
245 | .IP "\(bu" 4 | |
246 | \&\s-1ISO\s0 4217 also defines a numeric code for each currency. | |
247 | Currency codes are not currently supported by this module, | |
248 | in the same way Locale::Country supports multiple codesets. | |
249 | .IP "\(bu" 4 | |
250 | There are three cases where there is more than one | |
251 | code for the same currency name. | |
252 | Kwacha has two codes: mwk for Malawi, and zmk for Zambia. | |
253 | The Russian Ruble has two codes: rub and rur. | |
254 | The Belarussian Ruble has two codes: byr and byb. | |
255 | The \fIcurrency2code()\fR function only returns one code, so | |
256 | you might not get back the code you expected. | |
257 | .SH "SEE ALSO" | |
258 | .IX Header "SEE ALSO" | |
259 | .IP "Locale::Country" 4 | |
260 | .IX Item "Locale::Country" | |
261 | \&\s-1ISO\s0 codes for identification of country (\s-1ISO\s0 3166). | |
262 | .IP "Locale::Script" 4 | |
263 | .IX Item "Locale::Script" | |
264 | \&\s-1ISO\s0 codes for identification of written scripts (\s-1ISO\s0 15924). | |
265 | .IP "\s-1ISO\s0 4217:1995" 4 | |
266 | .IX Item "ISO 4217:1995" | |
267 | Code for the representation of currencies and funds. | |
268 | .IP "http://www.bsi\-global.com/iso4217currency" 4 | |
269 | .IX Item "http://www.bsi-global.com/iso4217currency" | |
270 | Official web page for the \s-1ISO\s0 4217 maintenance agency. | |
271 | This has the latest list of codes, in \s-1MS\s0 Word format. Boo. | |
272 | .SH "AUTHOR" | |
273 | .IX Header "AUTHOR" | |
274 | Michael Hennecke <hennecke@rz.uni\-karlsruhe.de> | |
275 | and | |
276 | Neil Bowers <neil@bowers.com> | |
277 | .SH "COPYRIGHT" | |
278 | .IX Header "COPYRIGHT" | |
279 | Copyright (C) 2002\-2004, Neil Bowers. | |
280 | .PP | |
281 | Copyright (c) 2001 Michael Hennecke and | |
282 | Canon Research Centre Europe (\s-1CRE\s0). | |
283 | .PP | |
284 | This module is free software; you can redistribute it and/or | |
285 | modify it under the same terms as Perl itself. |