File iaxmodem-handle-international-dialstring-prefix... of Package iaxmodem

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File iaxmodem-handle-international-dialstring-prefix.patch of Package iaxmodem

Index: b/lib/spandsp/src/at_interpreter.c
===================================================================
--- a/lib/spandsp/src/at_interpreter.c
+++ b/lib/spandsp/src/at_interpreter.c
@@ -847,6 +847,7 @@ static const char *at_cmd_A(at_state_t *
 static const char *at_cmd_D(at_state_t *s, const char *t)
 {
     int ok;
+    int first;
     char *u;
     char num[100 + 1];
     char ch;
@@ -858,6 +859,7 @@ static const char *at_cmd_D(at_state_t *
     s->command_dial = FALSE;
     t += 1;
     ok = FALSE;
+    first = TRUE;
     /* There are a numbers of options in a dial command string.
        Many are completely irrelevant in this application. */
     u = num;
@@ -867,6 +869,7 @@ static const char *at_cmd_D(at_state_t *
         {
             /* V.250 6.3.1.1 Basic digit set */
             *u++ = ch;
+            first = FALSE;
         }
         else
         {
@@ -880,7 +883,10 @@ static const char *at_cmd_D(at_state_t *
             case '#':
                 /* V.250 6.3.1.1 Full DTMF repertoire */
                 if (!s->p.pulse_dial)
+                {
                     *u++ = ch;
+                    first = FALSE;
+                }
                 break;
             case ' ':
             case '-':
@@ -890,6 +896,11 @@ static const char *at_cmd_D(at_state_t *
                 break;
             case '+':
                 /* V.250 6.3.1.1 International access code */
+                /* Allow + as first symbol in a dial string. */
+                if (first)
+                    *u++ = ch;
+                first = FALSE;
+                break;
             case ',':
                 /* V.250 6.3.1.2 Pause */
                 /* Pass these through to the application to handle. */

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