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Bug 780825 - Part 1: Read 0x81 and 0x82 UCS2 String on UICC. r=vicamo

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This commit is contained in:
Yoshi Huang 2012-08-08 12:20:54 +08:00
parent af48571b75
commit 1da6a72d47
1 changed files with 64 additions and 3 deletions
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67
dom/system/gonk/ril_worker.js
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@ -4166,6 +4166,11 @@ let GsmPDUHelper = {
readICCUCS2String: function readICCUCS2String(scheme, numOctets) {
let str = "";
switch (scheme) {
/**
* +------+---------+---------+---------+---------+------+------+
* | 0x80 | Ch1_msb | Ch1_lsb | Ch2_msb | Ch2_lsb | 0xff | 0xff |
* +------+---------+---------+---------+---------+------+------+
*/
case 0x80:
let isOdd = numOctets % 2;
let i;
@ -4181,10 +4186,66 @@ let GsmPDUHelper = {
// Skip trailing 0xff
Buf.seekIncoming((numOctets - i) * PDU_HEX_OCTET_SIZE);
break;
case 0x81:
case 0x81: // Fall through
case 0x82:
//TODO Bug 780825
Buf.seekIncoming(numOctets * PDU_HEX_OCTET_SIZE);
/**
* +------+-----+--------+-----+-----+-----+--------+------+
* | 0x81 | len | offset | Ch1 | Ch2 | ... | Ch_len | 0xff |
* +------+-----+--------+-----+-----+-----+--------+------+
*
* len : The length of characters.
* offset : 0hhh hhhh h000 0000
* Ch_n: bit 8 = 0
* GSM default alphabets
* bit 8 = 1
* UCS2 character whose char code is (Ch_n & 0x7f) + offset
*
* +------+-----+------------+------------+-----+-----+-----+--------+
* | 0x82 | len | offset_msb | offset_lsb | Ch1 | Ch2 | ... | Ch_len |
* +------+-----+------------+------------+-----+-----+-----+--------+
*
* len : The length of characters.
* offset_msb, offset_lsn: offset
* Ch_n: bit 8 = 0
* GSM default alphabets
* bit 8 = 1
* UCS2 character whose char code is (Ch_n & 0x7f) + offset
*/
let len = this.readHexOctet();
let offset, headerLen;
if (scheme == 0x81) {
offset = this.readHexOctet() << 7;
headerLen = 2;
} else {
offset = (this.readHexOctet() << 8) | this.readHexOctet();
headerLen = 3;
}
for (let i = 0; i < len; i++) {
let ch = this.readHexOctet();
if (ch & 0x80) {
// UCS2
str += String.fromCharCode((ch & 0x7f) + offset);
} else {
// GSM 8bit
let count = 0, gotUCS2 = 0;
while ((i + count + 1 < len)) {
count++;
if (this.readHexOctet() & 0x80) {
gotUCS2 = 1;
break;
};
}
// Unread.
// +1 for the GSM alphabet indexed at i,
Buf.seekIncoming(-1 * (count + 1) * PDU_HEX_OCTET_SIZE);
str += this.read8BitUnpackedToString(count + 1 - gotUCS2);
i += count - gotUCS2;
}
}
// Skipping trailing 0xff
Buf.seekIncoming((numOctets - len - headerLen) * PDU_HEX_OCTET_SIZE);
break;
}
return str;