diff options
Diffstat (limited to 'src/mm-sms-part.h')
| -rw-r--r-- | src/mm-sms-part.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/mm-sms-part.h b/src/mm-sms-part.h index 92f39b11..2ee7f308 100644 --- a/src/mm-sms-part.h +++ b/src/mm-sms-part.h @@ -20,11 +20,27 @@ #include <glib.h> #include <ModemManager.h> +/* Despite 3GPP TS 23.038 specifies that Unicode SMS messages are + * encoded in UCS-2, UTF-16 encoding is commonly used instead on many + * modern platforms to allow encoding code points that fall outside the + * Basic Multilingual Plane (BMP), such as Emoji. Most of the UCS-2 + * code points are identical to their equivalent UTF-16 code points. + * In UTF-16, non-BMP code points are encoded in a pair of surrogate + * code points (i.e. a high surrogate in 0xD800..0xDBFF, followed by a + * low surrogate in 0xDC00..0xDFFF). An isolated surrogate code point + * has no general interpretation in UTF-16, but could be a valid + * (though unmapped) code point in UCS-2. + * + * The current implementation in ModemManager just assumes that whenever + * possible (i.e. when parsing received PDUs or when creating submit + * PDUs) UTF-16 will be used instead of plain UCS-2 (even if the PDUs + * report the encoding as UCS-2). + */ typedef enum { /*< underscore_name=mm_sms_encoding >*/ MM_SMS_ENCODING_UNKNOWN = 0x0, MM_SMS_ENCODING_GSM7, MM_SMS_ENCODING_8BIT, - MM_SMS_ENCODING_UCS2 + MM_SMS_ENCODING_UCS2, } MMSmsEncoding; typedef struct _MMSmsPart MMSmsPart; |