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| author | Manuel A. Fernandez Montecelo <manuel.montezelo@gmail.com> | 2016-05-27 14:35:16 +0100 |
|---|---|---|
| committer | Manuel A. Fernandez Montecelo <manuel.montezelo@gmail.com> | 2016-05-27 14:35:16 +0100 |
| commit | 3590c846d4c2febbc05b4ad6b14a06edc549e453 (patch) | |
| tree | e5d38581c2f36e1cca02efedd2d85044d77f76f9 /doc/libunistring_13.html | |
| parent | a9a31b1de5776a3b08a82101a4fa711294f0dd1d (diff) | |
Imported Upstream version 0.9.6+really0.9.6upstream/0.9.6+really0.9.6
Diffstat (limited to 'doc/libunistring_13.html')
| -rw-r--r-- | doc/libunistring_13.html | 660 |
1 files changed, 278 insertions, 382 deletions
diff --git a/doc/libunistring_13.html b/doc/libunistring_13.html index 8b779109..ca81cf8a 100644 --- a/doc/libunistring_13.html +++ b/doc/libunistring_13.html @@ -1,6 +1,6 @@ <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd"> <html> -<!-- Created on March, 30 2010 by texi2html 1.78a --> +<!-- Created on July, 8 2015 by texi2html 1.78a --> <!-- Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author) Karl Berry <karl@freefriends.org> @@ -11,10 +11,10 @@ Send bugs and suggestions to <texi2html-bug@nongnu.org> --> <head> -<title>GNU libunistring: 13. Case mappings <unicase.h></title> +<title>GNU libunistring: 13. Normalization forms (composition and decomposition) <uninorm.h></title> -<meta name="description" content="GNU libunistring: 13. Case mappings <unicase.h>"> -<meta name="keywords" content="GNU libunistring: 13. Case mappings <unicase.h>"> +<meta name="description" content="GNU libunistring: 13. Normalization forms (composition and decomposition) <uninorm.h>"> +<meta name="keywords" content="GNU libunistring: 13. Normalization forms (composition and decomposition) <uninorm.h>"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="texi2html 1.78a"> @@ -42,7 +42,7 @@ ul.toc {list-style: none} <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_12.html#SEC42" title="Beginning of this chapter or previous chapter"> << </a>]</td> +<tr><td valign="middle" align="left">[<a href="libunistring_12.html#SEC47" title="Beginning of this chapter or previous chapter"> << </a>]</td> <td valign="middle" align="left">[<a href="libunistring_14.html#SEC54" title="Next chapter"> >> </a>]</td> <td valign="middle" align="left"> </td> <td valign="middle" align="left"> </td> @@ -51,446 +51,369 @@ ul.toc {list-style: none} <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_19.html#SEC77" 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="unicase_002eh"></a> +<a name="uninorm_002eh"></a> <a name="SEC48"></a> -<h1 class="chapter"> <a href="libunistring.html#TOC48">13. Case mappings <code><unicase.h></code></a> </h1> +<h1 class="chapter"> <a href="libunistring.html#TOC48">13. Normalization forms (composition and decomposition) <code><uninorm.h></code></a> </h1> -<p>This include file defines functions for case mapping for Unicode strings and -case insensitive comparison of Unicode strings and C strings. -</p> -<p>These string functions fix the problems that were mentioned in -<a href="libunistring_1.html#SEC6">‘<samp>char *</samp>’ strings</a>, namely, they handle the Croatian -<small>LETTER DZ WITH CARON</small>, the German <small>LATIN SMALL LETTER SHARP S</small>, the -Greek sigma and the Lithuanian i correctly. +<p>This include file defines functions for transforming Unicode strings to one +of the four normal forms, known as NFC, NFD, NKFC, NFKD. These +transformations involve decomposition and — for NFC and NFKC — composition +of Unicode characters. </p> <hr size="6"> -<a name="Case-mappings-of-characters"></a> +<a name="Decomposition-of-characters"></a> <a name="SEC49"></a> -<h2 class="section"> <a href="libunistring.html#TOC49">13.1 Case mappings of characters</a> </h2> +<h2 class="section"> <a href="libunistring.html#TOC49">13.1 Decomposition of Unicode characters</a> </h2> -<p>The following functions implement case mappings on Unicode characters — -for those cases only where the result of the mapping is a again a single +<p>The following enumerated values are the possible types of decomposition of a Unicode character. </p> -<p>These mappings are locale and context independent. -</p> -<table class="cartouche" border="1"><tr><td> -<p><strong>WARNING!</strong> These functions are not sufficient for languages such as -German, Greek and Lithuanian. Better use the functions below that treat an -entire string at once and are language aware. -</p></td></tr></table> - <dl> -<dt><u>Function:</u> ucs4_t <b>uc_toupper</b><i> (ucs4_t <var>uc</var>)</i> -<a name="IDX694"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_CANONICAL</b> +<a name="IDX767"></a> </dt> -<dd><p>Returns the uppercase mapping of the Unicode character <var>uc</var>. +<dd><p>Denotes canonical decomposition. </p></dd></dl> <dl> -<dt><u>Function:</u> ucs4_t <b>uc_tolower</b><i> (ucs4_t <var>uc</var>)</i> -<a name="IDX695"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_FONT</b> +<a name="IDX768"></a> </dt> -<dd><p>Returns the lowercase mapping of the Unicode character <var>uc</var>. +<dd><p>UCD marker: <code><font></code>. Denotes a font variant (e.g. a blackletter form). </p></dd></dl> <dl> -<dt><u>Function:</u> ucs4_t <b>uc_totitle</b><i> (ucs4_t <var>uc</var>)</i> -<a name="IDX696"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_NOBREAK</b> +<a name="IDX769"></a> </dt> -<dd><p>Returns the titlecase mapping of the Unicode character <var>uc</var>. -</p> -<p>The titlecase mapping of a character is to be used when the character should -look like upper case and the following characters are lower cased. -</p> -<p>For most characters, this is the same as the uppercase mapping. There are -only few characters where the title case variant and the uuper case variant -are different. These characters occur in the Latin writing of the Croatian, -Bosnian, and Serbian languages. -</p> -<table> -<thead><tr><th><p> Lower case </p></th><th><p> Title case </p></th><th><p> Upper case -</p></th></tr></thead> -<tr><td><p> LATIN SMALL LETTER LJ - </p></td><td><p> LATIN CAPITAL LETTER L WITH SMALL LETTER J - </p></td><td><p> LATIN CAPITAL LETTER LJ -</p></td></tr> -<tr><td><p> LATIN SMALL LETTER NJ - </p></td><td><p> LATIN CAPITAL LETTER N WITH SMALL LETTER J - </p></td><td><p> LATIN CAPITAL LETTER NJ -</p></td></tr> -<tr><td><p> LATIN SMALL LETTER DZ - </p></td><td><p> LATIN CAPITAL LETTER D WITH SMALL LETTER Z - </p></td><td><p> LATIN CAPITAL LETTER DZ -</p></td></tr> -<tr><td><p> LATIN SMALL LETTER DZ WITH CARON - </p></td><td><p> LATIN CAPITAL LETTER D WITH SMALL LETTER Z WITH CARON - </p></td><td><p> LATIN CAPITAL LETTER DZ WITH CARON -</p></td></tr> -</table> -</dd></dl> - -<hr size="6"> -<a name="Case-mappings-of-strings"></a> -<a name="SEC50"></a> -<h2 class="section"> <a href="libunistring.html#TOC50">13.2 Case mappings of strings</a> </h2> +<dd><p>UCD marker: <code><noBreak></code>. +Denotes a no-break version of a space or hyphen. +</p></dd></dl> -<p>Case mapping should always be performed on entire strings, not on individual -characters. The functions in this sections do so. -</p> -<p>These functions allow to apply a normalization after the case mapping. The -reason is that if you want to treat ‘<samp>ä</samp>’ and ‘<samp>Ä</samp>’ the same, -you most often also want to treat the composed and decomposed forms of such -a character, U+00C4 <small>LATIN CAPITAL LETTER A WITH DIAERESIS</small> and -U+0041 <small>LATIN CAPITAL LETTER A</small> U+0308 <small>COMBINING DIAERESIS</small> the same. -The <var>nf</var> argument designates the normalization. -</p> -<a name="IDX697"></a> -<p>These functions are locale dependent. The <var>iso639_language</var> argument -identifies the language (e.g. <code>"tr"</code> for Turkish). NULL means to use -locale independent case mappings. -</p> <dl> -<dt><u>Function:</u> const char * <b>uc_locale_language</b><i> ()</i> -<a name="IDX698"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_INITIAL</b> +<a name="IDX770"></a> </dt> -<dd><p>Returns the ISO 639 language code of the current locale. -Returns <code>""</code> if it is unknown, or in the "C" locale. +<dd><p>UCD marker: <code><initial></code>. +Denotes an initial presentation form (Arabic). </p></dd></dl> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_toupper</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX699"></a> -</dt> -<dt><u>Function:</u> uint16_t * <b>u16_toupper</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX700"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_MEDIAL</b> +<a name="IDX771"></a> </dt> -<dt><u>Function:</u> uint32_t * <b>u32_toupper</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX701"></a> -</dt> -<dd><p>Returns the uppercase mapping of a string. -</p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It can also be NULL, for no normalization. +<dd><p>UCD marker: <code><medial></code>. +Denotes a medial presentation form (Arabic). </p></dd></dl> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_tolower</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX702"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_FINAL</b> +<a name="IDX772"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_tolower</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX703"></a> -</dt> -<dt><u>Function:</u> uint32_t * <b>u32_tolower</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX704"></a> -</dt> -<dd><p>Returns the lowercase mapping of a string. -</p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It can also be NULL, for no normalization. +<dd><p>UCD marker: <code><final></code>. +Denotes a final presentation form (Arabic). </p></dd></dl> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_totitle</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX705"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_ISOLATED</b> +<a name="IDX773"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_totitle</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX706"></a> -</dt> -<dt><u>Function:</u> uint32_t * <b>u32_totitle</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX707"></a> -</dt> -<dd><p>Returns the titlecase mapping of a string. -</p> -<p>Mapping to title case means that, in each word, the first cased character -is being mapped to title case and the remaining characters of the word -are being mapped to lower case. -</p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It can also be NULL, for no normalization. +<dd><p>UCD marker: <code><isolated></code>. +Denotes an isolated presentation form (Arabic). </p></dd></dl> -<hr size="6"> -<a name="Case-mappings-of-substrings"></a> -<a name="SEC51"></a> -<h2 class="section"> <a href="libunistring.html#TOC51">13.3 Case mappings of substrings</a> </h2> - -<p>Case mapping of a substring cannot simply be performed by extracting the -substring and then applying the case mapping function to it. This does not -work because case mapping requires some information about the surrounding -characters. The following functions allow to apply case mappings to -substrings of a given string, while taking into account the characters that -precede it (the “prefix”) and the characters that follow it (the “suffix”). -</p> <dl> -<dt><u>Type:</u> <b>casing_prefix_context_t</b> -<a name="IDX708"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_CIRCLE</b> +<a name="IDX774"></a> </dt> -<dd><p>This data type denotes the case-mapping context that is given by a prefix -string. It is an immediate type that can be copied by simple assignment, -without involving memory allocation. It is not an array type. +<dd><p>UCD marker: <code><circle></code>. +Denotes an encircled form. </p></dd></dl> <dl> -<dt><u>Constant:</u> casing_prefix_context_t <b>unicase_empty_prefix_context</b> -<a name="IDX709"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_SUPER</b> +<a name="IDX775"></a> </dt> -<dd><p>This constant is the case-mapping context that corresponds to an empty prefix -string. +<dd><p>UCD marker: <code><super></code>. +Denotes a superscript form. </p></dd></dl> -<p>The following functions return <code>casing_prefix_context_t</code> objects: -</p> <dl> -<dt><u>Function:</u> casing_prefix_context_t <b>u8_casing_prefix_context</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX710"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_SUB</b> +<a name="IDX776"></a> </dt> -<dt><u>Function:</u> casing_prefix_context_t <b>u16_casing_prefix_context</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX711"></a> +<dd><p>UCD marker: <code><sub></code>. +Denotes a subscript form. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> int <b>UC_DECOMP_VERTICAL</b> +<a name="IDX777"></a> </dt> -<dt><u>Function:</u> casing_prefix_context_t <b>u32_casing_prefix_context</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX712"></a> +<dd><p>UCD marker: <code><vertical></code>. +Denotes a vertical layout presentation form. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> int <b>UC_DECOMP_WIDE</b> +<a name="IDX778"></a> </dt> -<dd><p>Returns the case-mapping context of a given prefix string. +<dd><p>UCD marker: <code><wide></code>. +Denotes a wide (or zenkaku) compatibility character. </p></dd></dl> <dl> -<dt><u>Function:</u> casing_prefix_context_t <b>u8_casing_prefixes_context</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>a_context</var>)</i> -<a name="IDX713"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_NARROW</b> +<a name="IDX779"></a> </dt> -<dt><u>Function:</u> casing_prefix_context_t <b>u16_casing_prefixes_context</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>a_context</var>)</i> -<a name="IDX714"></a> +<dd><p>UCD marker: <code><narrow></code>. +Denotes a narrow (or hankaku) compatibility character. +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> int <b>UC_DECOMP_SMALL</b> +<a name="IDX780"></a> </dt> -<dt><u>Function:</u> casing_prefix_context_t <b>u32_casing_prefixes_context</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>a_context</var>)</i> -<a name="IDX715"></a> +<dd><p>UCD marker: <code><small></code>. +Denotes a small variant form (CNS compatibility). +</p></dd></dl> + +<dl> +<dt><u>Constant:</u> int <b>UC_DECOMP_SQUARE</b> +<a name="IDX781"></a> </dt> -<dd><p>Returns the case-mapping context of the prefix concat(<var>a</var>, <var>s</var>), -given the case-mapping context of the prefix <var>a</var>. +<dd><p>UCD marker: <code><square></code>. +Denotes a CJK squared font variant. </p></dd></dl> <dl> -<dt><u>Type:</u> <b>casing_suffix_context_t</b> -<a name="IDX716"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_FRACTION</b> +<a name="IDX782"></a> </dt> -<dd><p>This data type denotes the case-mapping context that is given by a suffix -string. It is an immediate type that can be copied by simple assignment, -without involving memory allocation. It is not an array type. +<dd><p>UCD marker: <code><fraction></code>. +Denotes a vulgar fraction form. </p></dd></dl> <dl> -<dt><u>Constant:</u> casing_suffix_context_t <b>unicase_empty_suffix_context</b> -<a name="IDX717"></a> +<dt><u>Constant:</u> int <b>UC_DECOMP_COMPAT</b> +<a name="IDX783"></a> </dt> -<dd><p>This constant is the case-mapping context that corresponds to an empty suffix -string. +<dd><p>UCD marker: <code><compat></code>. +Denotes an otherwise unspecified compatibility character. </p></dd></dl> -<p>The following functions return <code>casing_suffix_context_t</code> objects: +<p>The following constant denotes the maximum size of decomposition of a single +Unicode character. </p> <dl> -<dt><u>Function:</u> casing_suffix_context_t <b>u8_casing_suffix_context</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX718"></a> -</dt> -<dt><u>Function:</u> casing_suffix_context_t <b>u16_casing_suffix_context</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX719"></a> +<dt><u>Macro:</u> unsigned int <b>UC_DECOMPOSITION_MAX_LENGTH</b> +<a name="IDX784"></a> </dt> -<dt><u>Function:</u> casing_suffix_context_t <b>u32_casing_suffix_context</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>)</i> -<a name="IDX720"></a> -</dt> -<dd><p>Returns the case-mapping context of a given suffix string. +<dd><p>This macro expands to a constant that is the required size of buffer passed to +the <code>uc_decomposition</code> and <code>uc_canonical_decomposition</code> functions. </p></dd></dl> +<p>The following functions decompose a Unicode character. +</p> <dl> -<dt><u>Function:</u> casing_suffix_context_t <b>u8_casing_suffixes_context</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_suffix_context_t <var>a_context</var>)</i> -<a name="IDX721"></a> +<dt><u>Function:</u> int <b>uc_decomposition</b><i> (ucs4_t <var>uc</var>, int *<var>decomp_tag</var>, ucs4_t *<var>decomposition</var>)</i> +<a name="IDX785"></a> </dt> -<dt><u>Function:</u> casing_suffix_context_t <b>u16_casing_suffixes_context</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_suffix_context_t <var>a_context</var>)</i> -<a name="IDX722"></a> -</dt> -<dt><u>Function:</u> casing_suffix_context_t <b>u32_casing_suffixes_context</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_suffix_context_t <var>a_context</var>)</i> -<a name="IDX723"></a> +<dd><p>Returns the character decomposition mapping of the Unicode character <var>uc</var>. +<var>decomposition</var> must point to an array of at least +<code>UC_DECOMPOSITION_MAX_LENGTH</code> <code>ucs_t</code> elements. +</p> +<p>When a decomposition exists, <code><var>decomposition</var>[0..<var>n</var>-1]</code> and +<code>*<var>decomp_tag</var></code> are filled and <var>n</var> is returned. Otherwise -1 is +returned. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> int <b>uc_canonical_decomposition</b><i> (ucs4_t <var>uc</var>, ucs4_t *<var>decomposition</var>)</i> +<a name="IDX786"></a> </dt> -<dd><p>Returns the case-mapping context of the suffix concat(<var>s</var>, <var>a</var>), -given the case-mapping context of the suffix <var>a</var>. +<dd><p>Returns the canonical character decomposition mapping of the Unicode character +<var>uc</var>. <var>decomposition</var> must point to an array of at least +<code>UC_DECOMPOSITION_MAX_LENGTH</code> <code>ucs_t</code> elements. +</p> +<p>When a decomposition exists, <code><var>decomposition</var>[0..<var>n</var>-1]</code> is filled +and <var>n</var> is returned. Otherwise -1 is returned. </p></dd></dl> -<p>The following functions perform a case mapping, considering the -prefix context and the suffix context. +<hr size="6"> +<a name="Composition-of-characters"></a> +<a name="SEC50"></a> +<h2 class="section"> <a href="libunistring.html#TOC50">13.2 Composition of Unicode characters</a> </h2> + +<p>The following function composes a Unicode character from two Unicode +characters. </p> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_ct_toupper</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX724"></a> +<dt><u>Function:</u> ucs4_t <b>uc_composition</b><i> (ucs4_t <var>uc1</var>, ucs4_t <var>uc2</var>)</i> +<a name="IDX787"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_ct_toupper</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX725"></a> -</dt> -<dt><u>Function:</u> uint32_t * <b>u32_ct_toupper</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX726"></a> -</dt> -<dd><p>Returns the uppercase mapping of a string that is surrounded by a prefix -and a suffix. +<dd><p>Attempts to combine the Unicode characters <var>uc1</var>, <var>uc2</var>. +<var>uc1</var> is known to have canonical combining class 0. +</p> +<p>Returns the combination of <var>uc1</var> and <var>uc2</var>, if it exists. +Returns 0 otherwise. +</p> +<p>Not all decompositions can be recombined using this function. See the Unicode +file ‘<tt>CompositionExclusions.txt</tt>’ for details. </p></dd></dl> +<hr size="6"> +<a name="Normalization-of-strings"></a> +<a name="SEC51"></a> +<h2 class="section"> <a href="libunistring.html#TOC51">13.3 Normalization of strings</a> </h2> + +<p>The Unicode standard defines four normalization forms for Unicode strings. +The following type is used to denote a normalization form. +</p> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_ct_tolower</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX727"></a> -</dt> -<dt><u>Function:</u> uint16_t * <b>u16_ct_tolower</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX728"></a> +<dt><u>Type:</u> <b>uninorm_t</b> +<a name="IDX788"></a> </dt> -<dt><u>Function:</u> uint32_t * <b>u32_ct_tolower</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX729"></a> -</dt> -<dd><p>Returns the lowercase mapping of a string that is surrounded by a prefix -and a suffix. +<dd><p>An object of type <code>uninorm_t</code> denotes a Unicode normalization form. +This is a scalar type; its values can be compared with <code>==</code>. </p></dd></dl> +<p>The following constants denote the four normalization forms. +</p> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_ct_totitle</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX730"></a> +<dt><u>Macro:</u> uninorm_t <b>UNINORM_NFD</b> +<a name="IDX789"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_ct_totitle</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX731"></a> -</dt> -<dt><u>Function:</u> uint32_t * <b>u32_ct_totitle</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX732"></a> +<dd><p>Denotes Normalization form D: canonical decomposition. +</p></dd></dl> + +<dl> +<dt><u>Macro:</u> uninorm_t <b>UNINORM_NFC</b> +<a name="IDX790"></a> </dt> -<dd><p>Returns the titlecase mapping of a string that is surrounded by a prefix -and a suffix. +<dd><p>Normalization form C: canonical decomposition, then canonical composition. </p></dd></dl> -<p>For example, to uppercase the UTF-8 substring between <code>s + start_index</code> -and <code>s + end_index</code> of a string that extends from <code>s</code> to -<code>s + u8_strlen (s)</code>, you can use the statements -</p> -<table><tr><td> </td><td><pre class="smallexample">size_t result_length; -uint8_t result = - u8_ct_toupper (s + start_index, end_index - start_index, - u8_casing_prefix_context (s, start_index), - u8_casing_suffix_context (s + end_index, - u8_strlen (s) - end_index), - iso639_language, NULL, NULL, &result_length); -</pre></td></tr></table> +<dl> +<dt><u>Macro:</u> uninorm_t <b>UNINORM_NFKD</b> +<a name="IDX791"></a> +</dt> +<dd><p>Normalization form KD: compatibility decomposition. +</p></dd></dl> -<hr size="6"> -<a name="Case-insensitive-comparison"></a> -<a name="SEC52"></a> -<h2 class="section"> <a href="libunistring.html#TOC52">13.4 Case insensitive comparison</a> </h2> +<dl> +<dt><u>Macro:</u> uninorm_t <b>UNINORM_NFKC</b> +<a name="IDX792"></a> +</dt> +<dd><p>Normalization form KC: compatibility decomposition, then canonical composition. +</p></dd></dl> -<p>The following functions implement comparison that ignores differences in case -and normalization. +<p>The following functions operate on <code>uninorm_t</code> objects. </p> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_casefold</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX733"></a> +<dt><u>Function:</u> bool <b>uninorm_is_compat_decomposing</b><i> (uninorm_t <var>nf</var>)</i> +<a name="IDX793"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_casefold</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX734"></a> +<dd><p>Tests whether the normalization form <var>nf</var> does compatibility decomposition. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> bool <b>uninorm_is_composing</b><i> (uninorm_t <var>nf</var>)</i> +<a name="IDX794"></a> </dt> -<dt><u>Function:</u> uint32_t * <b>u32_casefold</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX735"></a> +<dd><p>Tests whether the normalization form <var>nf</var> includes canonical composition. +</p></dd></dl> + +<dl> +<dt><u>Function:</u> uninorm_t <b>uninorm_decomposing_form</b><i> (uninorm_t <var>nf</var>)</i> +<a name="IDX795"></a> </dt> -<dd><p>Returns the case folded string. -</p> -<p>Comparing <code>u8_casefold (<var>s1</var>)</code> and <code>u8_casefold (<var>s2</var>)</code> -with the <code>u8_cmp2</code> function is equivalent to comparing <var>s1</var> and -<var>s2</var> with <code>u8_casecmp</code>. -</p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It can also be NULL, for no normalization. +<dd><p>Returns the decomposing variant of the normalization form <var>nf</var>. +This maps NFC,NFD → NFD and NFKC,NFKD → NFKD. </p></dd></dl> +<p>The following functions apply a Unicode normalization form to a Unicode string. +</p> <dl> -<dt><u>Function:</u> uint8_t * <b>u8_ct_casefold</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX736"></a> +<dt><u>Function:</u> uint8_t * <b>u8_normalize</b><i> (uninorm_t <var>nf</var>, const uint8_t *<var>s</var>, size_t <var>n</var>, uint8_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX796"></a> </dt> -<dt><u>Function:</u> uint16_t * <b>u16_ct_casefold</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX737"></a> +<dt><u>Function:</u> uint16_t * <b>u16_normalize</b><i> (uninorm_t <var>nf</var>, const uint16_t *<var>s</var>, size_t <var>n</var>, uint16_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX797"></a> </dt> -<dt><u>Function:</u> uint32_t * <b>u32_ct_casefold</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, casing_prefix_context_t <var>prefix_context</var>, casing_suffix_context_t <var>suffix_context</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX738"></a> +<dt><u>Function:</u> uint32_t * <b>u32_normalize</b><i> (uninorm_t <var>nf</var>, const uint32_t *<var>s</var>, size_t <var>n</var>, uint32_t *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX798"></a> </dt> -<dd><p>Returns the case folded string. The case folding takes into account the -case mapping contexts of the prefix and suffix strings. +<dd><p>Returns the specified normalization form of a string. </p></dd></dl> +<hr size="6"> +<a name="Normalizing-comparisons"></a> +<a name="SEC52"></a> +<h2 class="section"> <a href="libunistring.html#TOC52">13.4 Normalizing comparisons</a> </h2> + +<p>The following functions compare Unicode string, ignoring differences in +normalization. +</p> <dl> -<dt><u>Function:</u> int <b>u8_casecmp</b><i> (const uint8_t *<var>s1</var>, size_t <var>n1</var>, const uint8_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX739"></a> -</dt> -<dt><u>Function:</u> int <b>u16_casecmp</b><i> (const uint16_t *<var>s1</var>, size_t <var>n1</var>, const uint16_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX740"></a> +<dt><u>Function:</u> int <b>u8_normcmp</b><i> (const uint8_t *<var>s1</var>, size_t <var>n1</var>, const uint8_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX799"></a> </dt> -<dt><u>Function:</u> int <b>u32_casecmp</b><i> (const uint32_t *<var>s1</var>, size_t <var>n1</var>, const uint32_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX741"></a> +<dt><u>Function:</u> int <b>u16_normcmp</b><i> (const uint16_t *<var>s1</var>, size_t <var>n1</var>, const uint16_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX800"></a> </dt> -<dt><u>Function:</u> int <b>ulc_casecmp</b><i> (const char *<var>s1</var>, size_t <var>n1</var>, const char *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX742"></a> +<dt><u>Function:</u> int <b>u32_normcmp</b><i> (const uint32_t *<var>s1</var>, size_t <var>n1</var>, const uint32_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX801"></a> </dt> -<dd><p>Compares <var>s1</var> and <var>s2</var>, ignoring differences in case and normalization. +<dd><p>Compares <var>s1</var> and <var>s2</var>, ignoring differences in normalization. </p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It can also be NULL, for no normalization. +<p><var>nf</var> must be either <code>UNINORM_NFD</code> or <code>UNINORM_NFKD</code>. </p> <p>If successful, sets <code>*<var>resultp</var></code> to -1 if <var>s1</var> < <var>s2</var>, 0 if <var>s1</var> = <var>s2</var>, 1 if <var>s1</var> > <var>s2</var>, and returns 0. Upon failure, returns -1 with <code>errno</code> set. </p></dd></dl> -<a name="IDX743"></a> -<a name="IDX744"></a> -<a name="IDX745"></a> -<a name="IDX746"></a> -<p>The following functions additionally take into account the sorting rules of the -current locale. -</p> +<a name="IDX802"></a> +<a name="IDX803"></a> <dl> -<dt><u>Function:</u> char * <b>u8_casexfrm</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX747"></a> +<dt><u>Function:</u> char * <b>u8_normxfrm</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX804"></a> </dt> -<dt><u>Function:</u> char * <b>u16_casexfrm</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX748"></a> +<dt><u>Function:</u> char * <b>u16_normxfrm</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX805"></a> </dt> -<dt><u>Function:</u> char * <b>u32_casexfrm</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX749"></a> -</dt> -<dt><u>Function:</u> char * <b>ulc_casexfrm</b><i> (const char *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> -<a name="IDX750"></a> +<dt><u>Function:</u> char * <b>u32_normxfrm</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, uninorm_t <var>nf</var>, char *<var>resultbuf</var>, size_t *<var>lengthp</var>)</i> +<a name="IDX806"></a> </dt> <dd><p>Converts the string <var>s</var> of length <var>n</var> to a NUL-terminated byte -sequence, in such a way that comparing <code>u8_casexfrm (<var>s1</var>)</code> and -<code>u8_casexfrm (<var>s2</var>)</code> with the gnulib function <code>memcmp2</code> is -equivalent to comparing <var>s1</var> and <var>s2</var> with <code>u8_casecoll</code>. +sequence, in such a way that comparing <code>u8_normxfrm (<var>s1</var>)</code> and +<code>u8_normxfrm (<var>s2</var>)</code> with the <code>u8_cmp2</code> function is equivalent to +comparing <var>s1</var> and <var>s2</var> with the <code>u8_normcoll</code> function. </p> -<p><var>nf</var> must be either <code>UNINORM_NFC</code>, <code>UNINORM_NFKC</code>, or NULL for -no normalization. +<p><var>nf</var> must be either <code>UNINORM_NFC</code> or <code>UNINORM_NFKC</code>. </p></dd></dl> <dl> -<dt><u>Function:</u> int <b>u8_casecoll</b><i> (const uint8_t *<var>s1</var>, size_t <var>n1</var>, const uint8_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX751"></a> -</dt> -<dt><u>Function:</u> int <b>u16_casecoll</b><i> (const uint16_t *<var>s1</var>, size_t <var>n1</var>, const uint16_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX752"></a> +<dt><u>Function:</u> int <b>u8_normcoll</b><i> (const uint8_t *<var>s1</var>, size_t <var>n1</var>, const uint8_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX807"></a> </dt> -<dt><u>Function:</u> int <b>u32_casecoll</b><i> (const uint32_t *<var>s1</var>, size_t <var>n1</var>, const uint32_t *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX753"></a> +<dt><u>Function:</u> int <b>u16_normcoll</b><i> (const uint16_t *<var>s1</var>, size_t <var>n1</var>, const uint16_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX808"></a> </dt> -<dt><u>Function:</u> int <b>ulc_casecoll</b><i> (const char *<var>s1</var>, size_t <var>n1</var>, const char *<var>s2</var>, size_t <var>n2</var>, const char *<var>iso639_language</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> -<a name="IDX754"></a> +<dt><u>Function:</u> int <b>u32_normcoll</b><i> (const uint32_t *<var>s1</var>, size_t <var>n1</var>, const uint32_t *<var>s2</var>, size_t <var>n2</var>, uninorm_t <var>nf</var>, int *<var>resultp</var>)</i> +<a name="IDX809"></a> </dt> -<dd><p>Compares <var>s1</var> and <var>s2</var>, ignoring differences in case and normalization, -using the collation rules of the current locale. +<dd><p>Compares <var>s1</var> and <var>s2</var>, ignoring differences in normalization, using +the collation rules of the current locale. </p> -<p>The <var>nf</var> argument identifies the normalization form to apply after the -case-mapping. It must be either <code>UNINORM_NFC</code> or <code>UNINORM_NFKC</code>. -It can also be NULL, for no normalization. +<p><var>nf</var> must be either <code>UNINORM_NFC</code> or <code>UNINORM_NFKC</code>. </p> <p>If successful, sets <code>*<var>resultp</var></code> to -1 if <var>s1</var> < <var>s2</var>, 0 if <var>s1</var> = <var>s2</var>, 1 if <var>s1</var> > <var>s2</var>, and returns 0. @@ -498,93 +421,66 @@ Upon failure, returns -1 with <code>errno</code> set. </p></dd></dl> <hr size="6"> -<a name="Case-detection"></a> +<a name="Normalization-of-streams"></a> <a name="SEC53"></a> -<h2 class="section"> <a href="libunistring.html#TOC53">13.5 Case detection</a> </h2> +<h2 class="section"> <a href="libunistring.html#TOC53">13.5 Normalization of streams of Unicode characters</a> </h2> -<p>The following functions determine whether a Unicode string is entirely in -upper case. or entirely in lower case, or entirely in title case, or already -case-folded. +<p>A “stream of Unicode characters” is essentially a function that accepts an +<code>ucs4_t</code> argument repeatedly, optionally combined with a function that +“flushes” the stream. </p> <dl> -<dt><u>Function:</u> int <b>u8_is_uppercase</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX755"></a> -</dt> -<dt><u>Function:</u> int <b>u16_is_uppercase</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX756"></a> -</dt> -<dt><u>Function:</u> int <b>u32_is_uppercase</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX757"></a> +<dt><u>Type:</u> <b>struct uninorm_filter</b> +<a name="IDX810"></a> </dt> -<dd><p>Sets <code>*<var>resultp</var></code> to true if mapping NFD(<var>s</var>) to upper case is -a no-op, or to false otherwise, and returns 0. Upon failure, returns -1 with -<code>errno</code> set. +<dd><p>This is the data type of a stream of Unicode characters that normalizes its +input according to a given normalization form and passes the normalized +character sequence to the encapsulated stream of Unicode characters. </p></dd></dl> <dl> -<dt><u>Function:</u> int <b>u8_is_lowercase</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX758"></a> +<dt><u>Function:</u> struct uninorm_filter * <b>uninorm_filter_create</b><i> (uninorm_t <var>nf</var>, int (*<var>stream_func</var>) (void *<var>stream_data</var>, ucs4_t <var>uc</var>), void *<var>stream_data</var>)</i> +<a name="IDX811"></a> </dt> -<dt><u>Function:</u> int <b>u16_is_lowercase</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX759"></a> -</dt> -<dt><u>Function:</u> int <b>u32_is_lowercase</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX760"></a> -</dt> -<dd><p>Sets <code>*<var>resultp</var></code> to true if mapping NFD(<var>s</var>) to lower case is -a no-op, or to false otherwise, and returns 0. Upon failure, returns -1 with -<code>errno</code> set. +<dd><p>Creates and returns a normalization filter for Unicode characters. +</p> +<p>The pair (<var>stream_func</var>, <var>stream_data</var>) is the encapsulated stream. +<code><var>stream_func</var> (<var>stream_data</var>, <var>uc</var>)</code> receives the Unicode +character <var>uc</var> and returns 0 if successful, or -1 with <code>errno</code> set +upon failure. +</p> +<p>Returns the new filter, or NULL with <code>errno</code> set upon failure. </p></dd></dl> <dl> -<dt><u>Function:</u> int <b>u8_is_titlecase</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX761"></a> -</dt> -<dt><u>Function:</u> int <b>u16_is_titlecase</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX762"></a> +<dt><u>Function:</u> int <b>uninorm_filter_write</b><i> (struct uninorm_filter *<var>filter</var>, ucs4_t <var>uc</var>)</i> +<a name="IDX812"></a> </dt> -<dt><u>Function:</u> int <b>u32_is_titlecase</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX763"></a> -</dt> -<dd><p>Sets <code>*<var>resultp</var></code> to true if mapping NFD(<var>s</var>) to title case is -a no-op, or to false otherwise, and returns 0. Upon failure, returns -1 with -<code>errno</code> set. +<dd><p>Stuffs a Unicode character into a normalizing filter. +Returns 0 if successful, or -1 with <code>errno</code> set upon failure. </p></dd></dl> <dl> -<dt><u>Function:</u> int <b>u8_is_casefolded</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX764"></a> -</dt> -<dt><u>Function:</u> int <b>u16_is_casefolded</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX765"></a> +<dt><u>Function:</u> int <b>uninorm_filter_flush</b><i> (struct uninorm_filter *<var>filter</var>)</i> +<a name="IDX813"></a> </dt> -<dt><u>Function:</u> int <b>u32_is_casefolded</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX766"></a> -</dt> -<dd><p>Sets <code>*<var>resultp</var></code> to true if applying case folding to NFD(<var>S</var>) is -a no-op, or to false otherwise, and returns 0. Upon failure, returns -1 with -<code>errno</code> set. +<dd><p>Brings data buffered in the filter to its destination, the encapsulated stream. +</p> +<p>Returns 0 if successful, or -1 with <code>errno</code> set upon failure. +</p> +<p>Note! If after calling this function, additional characters are written +into the filter, the resulting character sequence in the encapsulated stream +will not necessarily be normalized. </p></dd></dl> -<p>The following functions determine whether case mappings have any effect on a -Unicode string. -</p> <dl> -<dt><u>Function:</u> int <b>u8_is_cased</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX767"></a> -</dt> -<dt><u>Function:</u> int <b>u16_is_cased</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX768"></a> +<dt><u>Function:</u> int <b>uninorm_filter_free</b><i> (struct uninorm_filter *<var>filter</var>)</i> +<a name="IDX814"></a> </dt> -<dt><u>Function:</u> int <b>u32_is_cased</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, const char *<var>iso639_language</var>, bool *<var>resultp</var>)</i> -<a name="IDX769"></a> -</dt> -<dd><p>Sets <code>*<var>resultp</var></code> to true if case matters for <var>s</var>, that is, if -mapping NFD(<var>s</var>) to either upper case or lower case or title case is not -a no-op. Set <code>*<var>resultp</var></code> to false if NFD(<var>s</var>) maps to itself -under the upper case mapping, under the lower case mapping, and under the title -case mapping; in other words, when NFD(<var>s</var>) consists entirely of caseless -characters. Upon failure, returns -1 with <code>errno</code> set. +<dd><p>Brings data buffered in the filter to its destination, the encapsulated stream, +then closes and frees the filter. +</p> +<p>Returns 0 if successful, or -1 with <code>errno</code> set upon failure. </p></dd></dl> <hr size="6"> <table cellpadding="1" cellspacing="1" border="0"> @@ -597,12 +493,12 @@ characters. Upon failure, returns -1 with <code>errno</code> set. <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_19.html#SEC77" 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>March, 30 2010</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78a</em></a>. + This document was generated by <em>Daiki Ueno</em> on <em>July, 8 2015</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.78a</em></a>. </font> <br> |