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| <h5 class="subsubsection">7.6.1.3 Printing the Sign of a Monetary Amount</h5> |
| |
| <p>These members of the <code>struct lconv</code> structure specify how to print |
| the sign (if any) of a monetary value. |
| |
| <dl> |
| <dt><code>char *positive_sign</code><dt><code>char *negative_sign</code><dd>These are strings used to indicate positive (or zero) and negative |
| monetary quantities, respectively. |
| |
| <p>In the standard ‘<samp><span class="samp">C</span></samp>’ locale, both of these members have a value of |
| <code>""</code> (the empty string), meaning “unspecified”. |
| |
| <p>The ISO standard doesn't say what to do when you find this value; we |
| recommend printing <code>positive_sign</code> as you find it, even if it is |
| empty. For a negative value, print <code>negative_sign</code> as you find it |
| unless both it and <code>positive_sign</code> are empty, in which case print |
| ‘<samp><span class="samp">-</span></samp>’ instead. (Failing to indicate the sign at all seems rather |
| unreasonable.) |
| |
| <br><dt><code>char p_sign_posn</code><dt><code>char n_sign_posn</code><dt><code>char int_p_sign_posn</code><dt><code>char int_n_sign_posn</code><dd>These members are small integers that indicate how to |
| position the sign for nonnegative and negative monetary quantities, |
| respectively. (The string used by the sign is what was specified with |
| <code>positive_sign</code> or <code>negative_sign</code>.) The possible values are |
| as follows: |
| |
| <dl> |
| <dt><code>0</code><dd>The currency symbol and quantity should be surrounded by parentheses. |
| |
| <br><dt><code>1</code><dd>Print the sign string before the quantity and currency symbol. |
| |
| <br><dt><code>2</code><dd>Print the sign string after the quantity and currency symbol. |
| |
| <br><dt><code>3</code><dd>Print the sign string right before the currency symbol. |
| |
| <br><dt><code>4</code><dd>Print the sign string right after the currency symbol. |
| |
| <br><dt><code>CHAR_MAX</code><dd>“Unspecified”. Both members have this value in the standard |
| ‘<samp><span class="samp">C</span></samp>’ locale. |
| </dl> |
| |
| <p>The ISO standard doesn't say what you should do when the value is |
| <code>CHAR_MAX</code>. We recommend you print the sign after the currency |
| symbol. |
| |
| <p>The members with the <code>int_</code> prefix apply to the |
| <code>int_curr_symbol</code> while the other two apply to |
| <code>currency_symbol</code>. |
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