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| author | Andreas Rottmann <a.rottmann@gmx.at> | 2009-09-14 12:32:44 +0200 |
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| committer | Andreas Rottmann <a.rottmann@gmx.at> | 2009-09-14 12:32:44 +0200 |
| commit | fa095a4504cbe668e4244547e2c141597bea4ecf (patch) | |
| tree | 06135820a286ffec47804e75fbf8a147e92acd2e /doc/libunistring_5.html | |
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'doc/libunistring_5.html')
| -rw-r--r-- | doc/libunistring_5.html | 296 |
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diff --git a/doc/libunistring_5.html b/doc/libunistring_5.html new file mode 100644 index 0000000..92e115f --- /dev/null +++ b/doc/libunistring_5.html @@ -0,0 +1,296 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd"> +<html> +<!-- Created on July, 1 2009 by texi2html 1.78a --> +<!-- +Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) + Karl Berry <karl@freefriends.org> + Olaf Bachmann <obachman@mathematik.uni-kl.de> + and many others. +Maintained by: Many creative people. +Send bugs and suggestions to <texi2html-bug@nongnu.org> + +--> +<head> +<title>GNU libunistring: 5. Conversions between Unicode and encodings <uniconv.h></title> + +<meta name="description" content="GNU libunistring: 5. Conversions between Unicode and encodings <uniconv.h>"> +<meta name="keywords" content="GNU libunistring: 5. Conversions between Unicode and encodings <uniconv.h>"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="texi2html 1.78a"> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +pre.display {font-family: serif} +pre.format {font-family: serif} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +pre.smalldisplay {font-family: serif; font-size: smaller} +pre.smallexample {font-size: smaller} +pre.smallformat {font-family: serif; font-size: smaller} +pre.smalllisp {font-size: smaller} +span.roman {font-family:serif; font-weight:normal;} +span.sansserif {font-family:sans-serif; font-weight:normal;} +ul.toc {list-style: none} +--> +</style> + + +</head> + +<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> + +<table cellpadding="1" cellspacing="1" border="0"> +<tr><td valign="middle" align="left">[<a href="libunistring_4.html#SEC11" title="Beginning of this chapter or previous chapter"> << </a>]</td> +<td valign="middle" align="left">[<a href="libunistring_6.html#SEC18" title="Next chapter"> >> </a>]</td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left">[<a href="libunistring.html#SEC_Top" title="Cover (top) of document">Top</a>]</td> +<td valign="middle" align="left">[<a href="libunistring.html#SEC_Contents" title="Table of contents">Contents</a>]</td> +<td valign="middle" align="left">[<a href="libunistring_18.html#SEC71" title="Index">Index</a>]</td> +<td valign="middle" align="left">[<a href="libunistring_abt.html#SEC_About" title="About (help)"> ? </a>]</td> +</tr></table> + +<hr size="2"> +<a name="uniconv_002eh"></a> +<a name="SEC17"></a> +<h1 class="chapter"> <a href="libunistring.html#TOC17">5. Conversions between Unicode and encodings <code><uniconv.h></code></a> </h1> + +<p>This include file declares functions for converting between Unicode strings +and <code>char *</code> strings in locale encoding or in other specified encodings. +</p> +<a name="IDX154"></a> +<p>The following function returns the locale encoding. +</p> +<dl> +<dt><u>Function:</u> const char * <b>locale_charset</b><i> ()</i> +<a name="IDX155"></a> +</dt> +<dd><p>Determines the current locale's character encoding, and canonicalizes it +into one of the canonical names listed in ‘<tt>config.charset</tt>’. +If the canonical name cannot be determined, the result is a non-canonical +name. +</p> +<p>The result must not be freed; it is statically allocated. +</p> +<p>The result of this function can be used as an argument to the <code>iconv_open</code> +function in GNU libc, in GNU libiconv, or in the gnulib provided wrapper +around the native <code>iconv_open</code> function. It may not work as an argument +to the native <code>iconv_open</code> function directly. +</p></dd></dl> + +<p>The handling of unconvertible characters during the conversions can be +parametrized through the following enumeration type: +</p> +<dl> +<dt><u>Type:</u> <b>enum iconv_ilseq_handler</b> +<a name="IDX156"></a> +</dt> +<dd><p>This type specifies how unconvertible characters in the input are handled. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> enum iconv_ilseq_handler <b>iconveh_error</b> +<a name="IDX157"></a> +</dt> +<dd><p>This handler causes the function to return with <code>errno</code> set to +<code>EILSEQ</code>. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> enum iconv_ilseq_handler <b>iconveh_question_mark</b> +<a name="IDX158"></a> +</dt> +<dd><p>This handler produces one question mark ‘<samp>?</samp>’ per unconvertible character. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> enum iconv_ilseq_handler <b>iconveh_escape_sequence</b> +<a name="IDX159"></a> +</dt> +<dd><p>This handler produces an escape sequence <code>\u<var>xxxx</var></code> or +<code>\U<var>xxxxxxxx</var></code> for each unconvertible character. +</p></dd></dl> + +<a name="IDX160"></a> +<p>The following functions convert between strings in a specified encoding and +Unicode strings. +</p> +<dl> +<dt><u>Function:</u> uint8_t * <b>u8_conv_from_encoding</b><i> (const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>, const char *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX161"></a> +</dt> +<dt><u>Function:</u> uint16_t * <b>u16_conv_from_encoding</b><i> (const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>, const char *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX162"></a> +</dt> +<dt><u>Function:</u> uint32_t * <b>u32_conv_from_encoding</b><i> (const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>, const char *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX163"></a> +</dt> +<dd><p>Converts an entire string, possibly including NUL bytes, from one encoding +to UTF-8 encoding. +</p> +<p>Converts a memory region given in encoding <var>fromcode</var>. <var>fromcode</var> is +as for the <code>iconv_open</code> function. +</p> +<p>The input is in the memory region between <var>src</var> (inclusive) and +<code><var>src</var> + <var>srclen</var></code> (exclusive). +</p> +<p>If <var>offsets</var> is not NULL, it should point to an array of <var>srclen</var> +integers; this array is filled with offsets into the result, i.e. the +character starting at <code><var>src</var>[i]</code> corresponds to the character starting +at <code><var>result</var>[<var>offsets</var>[i]]</code>, and other offsets are set to +<code>(size_t)(-1)</code>. +</p> +<p><code><var>resultbuf</var></code> and <code>*<var>lengthp</var></code> should be a scratch +buffer and its size, or <code><var>resultbuf</var></code> can be NULL. +</p> +<p>May erase the contents of the memory at <code><var>resultbuf</var></code>. +</p> +<p>If successful: The resulting Unicode string (non-NULL) is returned and +its length stored in <code>*<var>lengthp</var></code>. The resulting string is +<code><var>resultbuf</var></code> if no dynamic memory allocation was necessary, +or a freshly allocated memory block otherwise. +</p> +<p>In case of error: NULL is returned and <code>errno</code> is set. +Particular <code>errno</code> values: <code>EINVAL</code>, <code>EILSEQ</code>, <code>ENOMEM</code>. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> char * <b>u8_conv_to_encoding</b><i> (const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>, const uint8_t *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX164"></a> +</dt> +<dt><u>Function:</u> char * <b>u16_conv_to_encoding</b><i> (const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>, const uint16_t *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX165"></a> +</dt> +<dt><u>Function:</u> char * <b>u32_conv_to_encoding</b><i> (const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>, const uint32_t *<var>src</var>, size_t <var>srclen</var>, size_t *<var>offsets</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX166"></a> +</dt> +<dd><p>Converts an entire Unicode string, possibly including NUL units, from UTF-8 +encoding to a given encoding. +</p> +<p>Converts a memory region to encoding <var>tocode</var>. <var>tocode</var> is as for +the <code>iconv_open</code> function. +</p> +<p>The input is in the memory region between <var>src</var> (inclusive) and +<code><var>src</var> + <var>srclen</var></code> (exclusive). +</p> +<p>If <var>offsets</var> is not NULL, it should point to an array of <var>srclen</var> +integers; this array is filled with offsets into the result, i.e. the +character starting at <code><var>src</var>[i]</code> corresponds to the character starting +at <code><var>result</var>[<var>offsets</var>[i]]</code>, and other offsets are set to +<code>(size_t)(-1)</code>. +</p> +<p><code><var>resultbuf</var></code> and <code>*<var>lengthp</var></code> should be a scratch +buffer and its size, or <code><var>resultbuf</var></code> can be NULL. +</p> +<p>May erase the contents of the memory at <code><var>resultbuf</var></code>. +</p> +<p>If successful: The resulting Unicode string (non-NULL) is returned and +its length stored in <code>*<var>lengthp</var></code>. The resulting string is +<code><var>resultbuf</var></code> if no dynamic memory allocation was necessary, +or a freshly allocated memory block otherwise. +</p> +<p>In case of error: NULL is returned and <code>errno</code> is set. +Particular <code>errno</code> values: <code>EINVAL</code>, <code>EILSEQ</code>, <code>ENOMEM</code>. +</p></dd></dl> + +<p>The following functions convert between NUL terminated strings in a specified +encoding and NUL terminated Unicode strings. +</p> +<dl> +<dt><u>Function:</u> uint8_t * <b>u8_strconv_from_encoding</b><i> (const char *<var>string</var>, const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX167"></a> +</dt> +<dt><u>Function:</u> uint16_t * <b>u16_strconv_from_encoding</b><i> (const char *<var>string</var>, const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX168"></a> +</dt> +<dt><u>Function:</u> uint32_t * <b>u32_strconv_from_encoding</b><i> (const char *<var>string</var>, const char *<var>fromcode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX169"></a> +</dt> +<dd><p>Converts a NUL terminated string from a given encoding. +</p> +<p>The result is <code>malloc</code> allocated, or NULL (with <var>errno</var> set) in case of error. +</p> +<p>Particular <code>errno</code> values: <code>EILSEQ</code>, <code>ENOMEM</code>. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> char * <b>u8_strconv_to_encoding</b><i> (const uint8_t *<var>string</var>, const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX170"></a> +</dt> +<dt><u>Function:</u> char * <b>u16_strconv_to_encoding</b><i> (const uint16_t *<var>string</var>, const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX171"></a> +</dt> +<dt><u>Function:</u> char * <b>u32_strconv_to_encoding</b><i> (const uint32_t *<var>string</var>, const char *<var>tocode</var>, enum iconv_ilseq_handler <var>handler</var>)</i> +<a name="IDX172"></a> +</dt> +<dd><p>Converts a NUL terminated string to a given encoding. +</p> +<p>The result is <code>malloc</code> allocated, or NULL (with <code>errno</code> set) in case of error. +</p> +<p>Particular <code>errno</code> values: <code>EILSEQ</code>, <code>ENOMEM</code>. +</p></dd></dl> + +<p>The following functions are shorthands that convert between NUL terminated +strings in locale encoding and NUL terminated Unicode strings. +</p> +<dl> +<dt><u>Function:</u> uint8_t * <b>u8_strconv_from_locale</b><i> (const char *<var>string</var>)</i> +<a name="IDX173"></a> +</dt> +<dt><u>Function:</u> uint16_t * <b>u16_strconv_from_locale</b><i> (const char *<var>string</var>)</i> +<a name="IDX174"></a> +</dt> +<dt><u>Function:</u> uint32_t * <b>u32_strconv_from_locale</b><i> (const char *<var>string</var>)</i> +<a name="IDX175"></a> +</dt> +<dd><p>Converts a NUL terminated string from the locale encoding. +</p> +<p>The result is <code>malloc</code> allocated, or NULL (with <code>errno</code> set) in case of error. +</p> +<p>Particular <code>errno</code> values: <code>ENOMEM</code>. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> char * <b>u8_strconv_to_locale</b><i> (const uint8_t *<var>string</var>)</i> +<a name="IDX176"></a> +</dt> +<dt><u>Function:</u> char * <b>u16_strconv_to_locale</b><i> (const uint16_t *<var>string</var>)</i> +<a name="IDX177"></a> +</dt> +<dt><u>Function:</u> char * <b>u32_strconv_to_locale</b><i> (const uint32_t *<var>string</var>)</i> +<a name="IDX178"></a> +</dt> +<dd><p>Converts a NUL terminated string to the locale encoding. +</p> +<p>The result is <code>malloc</code> allocated, or NULL (with <code>errno</code> set) in case of error. +</p> +<p>Particular <code>errno</code> values: <code>ENOMEM</code>. +</p></dd></dl> +<hr size="6"> +<table cellpadding="1" cellspacing="1" border="0"> +<tr><td valign="middle" align="left">[<a href="libunistring_4.html#SEC11" title="Beginning of this chapter or previous chapter"> << </a>]</td> +<td valign="middle" align="left">[<a href="libunistring_6.html#SEC18" title="Next chapter"> >> </a>]</td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left"> </td> +<td valign="middle" align="left">[<a href="libunistring.html#SEC_Top" title="Cover (top) of document">Top</a>]</td> +<td valign="middle" align="left">[<a href="libunistring.html#SEC_Contents" title="Table of contents">Contents</a>]</td> +<td valign="middle" align="left">[<a href="libunistring_18.html#SEC71" title="Index">Index</a>]</td> +<td valign="middle" align="left">[<a href="libunistring_abt.html#SEC_About" title="About (help)"> ? </a>]</td> +</tr></table> +<p> + <font size="-1"> + This document was generated by <em>Bruno Haible</em> on <em>July, 1 2009</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78a</em></a>. + </font> + <br> + +</p> +</body> +</html> |