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| <h3 class="section">6.2 Overview about Character Handling Functions</h3> |
| |
| <p>A Unix C library<!-- /@w --> contains three different sets of functions in two |
| families to handle character set conversion. One of the function families |
| (the most commonly used) is specified in the ISO C90<!-- /@w --> standard and, |
| therefore, is portable even beyond the Unix world. Unfortunately this |
| family is the least useful one. These functions should be avoided |
| whenever possible, especially when developing libraries (as opposed to |
| applications). |
| |
| <p>The second family of functions got introduced in the early Unix standards |
| (XPG2) and is still part of the latest and greatest Unix standard: |
| Unix 98<!-- /@w -->. It is also the most powerful and useful set of functions. |
| But we will start with the functions defined in Amendment 1<!-- /@w --> to |
| ISO C90<!-- /@w -->. |
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