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| <h2 class="chapter">9 Locale (<samp><span class="file">locale.h</span></samp>)</h2> |
| |
| <p>A <dfn>locale</dfn> is the name for a collection of parameters (affecting |
| collating sequences and formatting conventions) that may be different |
| depending on location or culture. The <code>"C"</code> locale is the only |
| one defined in the ANSI C standard. |
| |
| <p>This is a minimal implementation, supporting only the required <code>"C"</code> |
| value for locale; strings representing other locales are not |
| honored. (<code>""</code> is also accepted; it represents the default locale |
| for an implementation, here equivalent to <code>"C"</code>. |
| |
| <p><samp><span class="file">locale.h</span></samp> defines the structure <code>lconv</code> to collect the |
| information on a locale, with the following fields: |
| |
| <dl> |
| <dt><code>char *decimal_point</code><dd>The decimal point character used to format “ordinary” numbers (all |
| numbers except those referring to amounts of money). <code>"."</code> in the |
| C locale. |
| |
| <br><dt><code>char *thousands_sep</code><dd>The character (if any) used to separate groups of digits, when |
| formatting ordinary numbers. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *grouping</code><dd>Specifications for how many digits to group (if any grouping is done at |
| all) when formatting ordinary numbers. The <em>numeric value</em> of each |
| character in the string represents the number of digits for the next |
| group, and a value of <code>0</code> (that is, the string's trailing |
| <code>NULL</code>) means to continue grouping digits using the last value |
| specified. Use <code>CHAR_MAX</code> to indicate that no further grouping is |
| desired. <code>""</code> in the C locale. |
| |
| <br><dt><code>char *int_curr_symbol</code><dd>The international currency symbol (first three characters), if any, and |
| the character used to separate it from numbers. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *currency_symbol</code><dd>The local currency symbol, if any. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *mon_decimal_point</code><dd>The symbol used to delimit fractions in amounts of money. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *mon_thousands_sep</code><dd>Similar to <code>thousands_sep</code>, but used for amounts of money. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *mon_grouping</code><dd>Similar to <code>grouping</code>, but used for amounts of money. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *positive_sign</code><dd>A string to flag positive amounts of money when formatting. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char *negative_sign</code><dd>A string to flag negative amounts of money when formatting. |
| <code>""</code> in the C locale. |
| |
| <br><dt><code>char int_frac_digits</code><dd>The number of digits to display when formatting amounts of money to |
| international conventions. |
| <code>CHAR_MAX</code> (the largest number representable as a <code>char</code>) in |
| the C locale. |
| |
| <br><dt><code>char frac_digits</code><dd>The number of digits to display when formatting amounts of money to |
| local conventions. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char p_cs_precedes</code><dd><code>1</code> indicates the local currency symbol is used before a |
| <em>positive or zero</em> formatted amount of money; <code>0</code> indicates |
| the currency symbol is placed after the formatted number. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char p_sep_by_space</code><dd><code>1</code> indicates the local currency symbol must be separated from |
| <em>positive or zero</em> numbers by a space; <code>0</code> indicates that it |
| is immediately adjacent to numbers. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char n_cs_precedes</code><dd><code>1</code> indicates the local currency symbol is used before a |
| <em>negative</em> formatted amount of money; <code>0</code> indicates |
| the currency symbol is placed after the formatted number. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char n_sep_by_space</code><dd><code>1</code> indicates the local currency symbol must be separated from |
| <em>negative</em> numbers by a space; <code>0</code> indicates that it |
| is immediately adjacent to numbers. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char p_sign_posn</code><dd>Controls the position of the <em>positive</em> sign for |
| numbers representing money. <code>0</code> means parentheses surround the |
| number; <code>1</code> means the sign is placed before both the number and the |
| currency symbol; <code>2</code> means the sign is placed after both the number |
| and the currency symbol; <code>3</code> means the sign is placed just before |
| the currency symbol; and <code>4</code> means the sign is placed just after |
| the currency symbol. |
| <code>CHAR_MAX</code> in the C locale. |
| |
| <br><dt><code>char n_sign_posn</code><dd>Controls the position of the <em>negative</em> sign for numbers |
| representing money, using the same rules as <code>p_sign_posn</code>. |
| <code>CHAR_MAX</code> in the C locale. |
| </dl> |
| |
| <ul class="menu"> |
| <li><a accesskey="1" href="setlocale.html#setlocale">setlocale</a>: Select or query locale |
| </ul> |
| |
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| |