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-rw-r--r--android/PhoneNumberUtils.cpp326
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diff --git a/android/PhoneNumberUtils.cpp b/android/PhoneNumberUtils.cpp
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+/* //device/vmlibs-android/com.android.internal.telephony/PhoneNumberUtils.java
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <string.h>
+
+namespace android {
+
+
+/*
+ * Special characters
+ *
+ * (See "What is a phone number?" doc)
+ * 'p' --- GSM pause character, same as comma
+ * 'n' --- GSM wild character
+ * 'w' --- GSM wait character
+ */
+static char PAUSE = 'p';
+static char WAIT = 'w';
+static char WILD = 'n';
+
+static int MIN_MATCH = 5;
+
+/** True if c is ISO-LATIN characters 0-9 */
+static bool isISODigit (char c)
+{
+ return c >= '0' && c <= '9';
+}
+
+/** True if c is ISO-LATIN characters 0-9, *, # , +, WILD */
+static bool isDialable(char c)
+{
+ return (c >= '0' && c <= '9') || c == '*' || c == '#' || c == '+' || c == WILD;
+}
+
+/** True if c is ISO-LATIN characters 0-9, *, # , +, WILD, WAIT, PAUSE */
+static bool isNonSeparator(char c)
+{
+ return (c >= '0' && c <= '9') || c == '*' || c == '#' || c == '+'
+ || c == WILD || c == WAIT || c == PAUSE;
+}
+
+/**
+ * Phone numbers are stored in "lookup" form in the database
+ * as reversed strings to allow for caller ID lookup
+ *
+ * This method takes a phone number and makes a valid SQL "LIKE"
+ * string that will match the lookup form
+ *
+ */
+/** all of a up to len must be an international prefix or
+ * separators/non-dialing digits
+ */
+static bool matchIntlPrefix(const char* a, int len)
+{
+ /* '([^0-9*#+pwn]\+[^0-9*#+pwn] | [^0-9*#+pwn]0(0|11)[^0-9*#+pwn] )$' */
+ /* 0 1 2 3 45 */
+
+ int state = 0;
+ for (int i = 0 ; i < len ; i++) {
+ char c = a[i];
+
+ switch (state) {
+ case 0:
+ if (c == '+') state = 1;
+ else if (c == '0') state = 2;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 2:
+ if (c == '0') state = 3;
+ else if (c == '1') state = 4;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 4:
+ if (c == '1') state = 5;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ default:
+ if (isNonSeparator(c)) return false;
+ break;
+
+ }
+ }
+
+ return state == 1 || state == 3 || state == 5;
+}
+
+/** all of 'a' up to len must match non-US trunk prefix ('0') */
+static bool matchTrunkPrefix(const char* a, int len)
+{
+ bool found;
+
+ found = false;
+
+ for (int i = 0 ; i < len ; i++) {
+ char c = a[i];
+
+ if (c == '0' && !found) {
+ found = true;
+ } else if (isNonSeparator(c)) {
+ return false;
+ }
+ }
+
+ return found;
+}
+
+/** all of 'a' up to len must be a (+|00|011)country code)
+ * We're fast and loose with the country code. Any \d{1,3} matches */
+static bool matchIntlPrefixAndCC(const char* a, int len)
+{
+ /* [^0-9*#+pwn]*(\+|0(0|11)\d\d?\d? [^0-9*#+pwn] $ */
+ /* 0 1 2 3 45 6 7 8 */
+
+ int state = 0;
+ for (int i = 0 ; i < len ; i++ ) {
+ char c = a[i];
+
+ switch (state) {
+ case 0:
+ if (c == '+') state = 1;
+ else if (c == '0') state = 2;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 2:
+ if (c == '0') state = 3;
+ else if (c == '1') state = 4;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 4:
+ if (c == '1') state = 5;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 1:
+ case 3:
+ case 5:
+ if (isISODigit(c)) state = 6;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ case 6:
+ case 7:
+ if (isISODigit(c)) state++;
+ else if (isNonSeparator(c)) return false;
+ break;
+
+ default:
+ if (isNonSeparator(c)) return false;
+ }
+ }
+
+ return state == 6 || state == 7 || state == 8;
+}
+
+/** or -1 if both are negative */
+static int minPositive(int a, int b)
+{
+ if (a >= 0 && b >= 0) {
+ return (a < b) ? a : b;
+ } else if (a >= 0) { /* && b < 0 */
+ return a;
+ } else if (b >= 0) { /* && a < 0 */
+ return b;
+ } else { /* a < 0 && b < 0 */
+ return -1;
+ }
+}
+
+/**
+ * Return the offset into a of the first appearance of b, or -1 if there
+ * is no such character in a.
+ */
+static int indexOf(const char *a, char b) {
+ char *ix = strchr(a, b);
+
+ if (ix == NULL)
+ return -1;
+ else
+ return ix - a;
+}
+
+/** index of the last character of the network portion
+ * (eg anything after is a post-dial string)
+ */
+static int indexOfLastNetworkChar(const char* a)
+{
+ int pIndex, wIndex;
+ int origLength;
+ int trimIndex;
+
+ origLength = strlen(a);
+
+ pIndex = indexOf(a, PAUSE);
+ wIndex = indexOf(a, WAIT);
+
+ trimIndex = minPositive(pIndex, wIndex);
+
+ if (trimIndex < 0) {
+ return origLength - 1;
+ } else {
+ return trimIndex - 1;
+ }
+}
+
+/**
+ * Compare phone numbers a and b, return true if they're identical
+ * enough for caller ID purposes.
+ *
+ * - Compares from right to left
+ * - requires MIN_MATCH (5) characters to match
+ * - handles common trunk prefixes and international prefixes
+ * (basically, everything except the Russian trunk prefix)
+ *
+ * Tolerates nulls
+ */
+bool phone_number_compare(const char* a, const char* b)
+{
+ int ia, ib;
+ int matched;
+
+ if (a == NULL || b == NULL)
+ {
+ return false;
+ }
+
+ if (strlen(a) == 0 || strlen(b) == 0)
+ {
+ return false;
+ }
+
+ ia = indexOfLastNetworkChar(a);
+ ib = indexOfLastNetworkChar(b);
+ matched = 0;
+
+ while (ia >= 0 && ib >=0) {
+ char ca, cb;
+ bool skipCmp = false;
+
+ ca = a[ia];
+
+ if (!isDialable(ca)) {
+ ia--;
+ skipCmp = true;
+ }
+
+ cb = b[ib];
+
+ if (!isDialable(cb)) {
+ ib--;
+ skipCmp = true;
+ }
+
+ if (!skipCmp) {
+ if (cb != ca && ca != WILD && cb != WILD) {
+ break;
+ }
+ ia--; ib--; matched++;
+ }
+ }
+
+ if (matched < MIN_MATCH) {
+ int aLen = strlen(a);
+
+ // if the input strings match, but their lengths < MIN_MATCH,
+ // treat them as equal.
+ if (aLen == strlen(b) && aLen == matched) {
+ return true;
+ }
+ return false;
+ }
+
+ // At least one string has matched completely;
+ if (matched >= MIN_MATCH && (ia < 0 || ib < 0)) {
+ return true;
+ }
+
+ /*
+ * Now, what remains must be one of the following for a
+ * match:
+ *
+ * - a '+' on one and a '00' or a '011' on the other
+ * - a '0' on one and a (+,00)<country code> on the other
+ * (for this, a '0' and a '00' prefix would have succeeded above)
+ */
+
+ if (matchIntlPrefix(a, ia + 1)
+ && matchIntlPrefix (b, ib +1)
+ ) {
+ return true;
+ }
+
+ if (matchTrunkPrefix(a, ia + 1)
+ && matchIntlPrefixAndCC(b, ib +1)
+ ) {
+ return true;
+ }
+
+ if (matchTrunkPrefix(b, ib + 1)
+ && matchIntlPrefixAndCC(a, ia +1)
+ ) {
+ return true;
+ }
+
+ return false;
+}
+
+} // namespace android
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