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Add g_unicode_script_from_iso15924()

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And adjust g_unicode_script_to_iso1592().
This commit is contained in:
Behdad Esfahbod
2011-07-20 22:11:08 -04:00
parent a5e94cbd36
commit 9bcb3d7457
5 changed files with 51 additions and 4 deletions
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43
glib/guniprop.c
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@@ -1448,15 +1448,54 @@ static const guint32 iso15924_tags[] =
* See <ulink url="http://unicode.org/iso15924/codelists.html">Codes for the
* representation of names of scripts</ulink> for details.
*
* Return value: the ISO 15924 code for @script, encoded as an integer.
* Return value: the ISO 15924 code for @script, encoded as an integer,
* of zero if @script is %G_UNICODE_SCRIPT_INVALID_CODE or
* ISO 15924 code 'Zzzz' (script code for UNKNOWN) if @script is not understood.
*
* Since: 2.30
*/
guint32
g_unicode_script_to_iso15924 (GUnicodeScript script)
{
if (G_UNLIKELY (script < 0 || script >= (int) G_N_ELEMENTS (iso15924_tags)))
if (G_UNLIKELY (script == G_UNICODE_SCRIPT_INVALID_CODE))
return 0;
if (G_UNLIKELY (script < 0 || script >= (int) G_N_ELEMENTS (iso15924_tags)))
return 0x5A7A7A7A;
return iso15924_tags[script];
}
/**
* g_unicode_script_from_iso15924:
* @iso15924: a Unicode script
*
* Looks up the Unicode script for @iso15924. ISO 15924 assigns four-letter
* codes to scripts. For example, the code for Arabic is 'Arab'.
* This function accepts four letter codes encoded as a @guint32 in a
* big-endian fashion. That is, the code expected for Arabic is
* 0x41726162 (0x41 is ASCII code for 'A', 0x72 is ASCII code for 'r', etc).
*
* See <ulink url="http://unicode.org/iso15924/codelists.html">Codes for the
* representation of names of scripts</ulink> for details.
*
* Return value: the Unicode script for @iso15924, or
* of %G_UNICODE_SCRIPT_INVALID_CODE if @iso15924 is zero and
* %G_UNICODE_SCRIPT_UNKNOWN if @iso15924 is unknown.
*
* Since: 2.30
*/
GUnicodeScript
g_unicode_script_from_iso15924 (guint32 iso15924)
{
unsigned int i;
if (!iso15924)
return G_UNICODE_SCRIPT_INVALID_CODE;
for (i = 0; i < G_N_ELEMENTS (iso15924_tags); i++)
if (iso15924_tags[i] == iso15924)
return (GUnicodeScript) i;
return G_UNICODE_SCRIPT_UNKNOWN;
}