@@ -142,6 +142,22 @@ int utf16_utf8_strncpy(char **dst, const u16 *src, size_t count);
*/
#define utf16_utf8_strcpy(d, s) utf16_utf8_strncpy((d), (s), SIZE_MAX)
+/**
+ * utf_to_lower() - convert a Unicode letter to lower case
+ *
+ * @code: letter to convert
+ * Return: lower case letter or unchanged letter
+ */
+s32 utf_to_lower(const s32 code);
+
+/**
+ * utf_to_upper() - convert a Unicode letter to upper case
+ *
+ * @code: letter to convert
+ * Return: upper case letter or unchanged letter
+ */
+s32 utf_to_upper(const s32 code);
+
/**
* u16_strlen - count non-zero words
*
@@ -6,8 +6,12 @@
*/
#include <charset.h>
+#include <capitalization.h>
#include <malloc.h>
+static struct capitalization_table capitalization_table[] =
+ UNICODE_CAPITALIZATION_TABLE;
+
s32 utf8_get(const char **src)
{
s32 code = 0;
@@ -248,6 +252,43 @@ int utf16_utf8_strncpy(char **dst, const u16 *src, size_t count)
return 0;
}
+s32 utf_to_lower(const s32 code)
+{
+ struct capitalization_table *pos = capitalization_table;
+ s32 ret = code;
+
+ if (code <= 0x7f) {
+ if (code >= 'A' && code <= 'Z')
+ ret += 0x20;
+ return ret;
+ }
+ for (; pos->upper; ++pos) {
+ if (pos->upper == code) {
+ ret = pos->lower;
+ break;
+ }
+ }
+ return ret;
+}
+
+s32 utf_to_upper(const s32 code)
+{
+ struct capitalization_table *pos = capitalization_table;
+ s32 ret = code;
+
+ if (code <= 0x7f) {
+ if (code >= 'a' && code <= 'z')
+ ret -= 0x20;
+ return ret;
+ }
+ for (; pos->lower; ++pos) {
+ if (pos->lower == code) {
+ ret = pos->upper;
+ break;
+ }
+ }
+ return ret;
+}
size_t u16_strlen(const u16 *in)
{
Provide functions for upper and lower case conversion. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> --- include/charset.h | 16 ++++++++++++++++ lib/charset.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+)