Fix #75825: mailparse_uudecode_all doesn't parse multiple files

As is, multiple uuencoded files needs to be separated by at least one
blank line.  This restriction appears to be somewhat arbitrary, since
the end of each file is already signaled by the sequence of a line with
a backtick only, followed by a line with the word "end" only. Thus, we
lift this restriction.

Closes GH-16.

mailparse.c

@@ -703,13 +703,17 @@ static size_t mailparse_do_uudecode(php_stream *instream, php_stream *outstream)
 	int x, A, B, C, D, n;
 	size_t file_size = 0;
 	char line[128];
+	int backtick_line = 0;
 
 	if (outstream) {
 		/* write to outstream */
 		while(!php_stream_eof(instream))	{
-			if (!php_stream_gets(instream, line, sizeof(line))) {
+			if (!php_stream_gets(instream, line, sizeof(line))
+			 	|| backtick_line && strncmp(line, "end", 3) == 0 && (line[3] == '\r' || line[3] == '\n')
+			) {
 				break;
 			}
+			backtick_line = line[0] == '`' && (line[1] == '\r' || line[1] == '\n');
 			x = 0;
 
 			UU_NEXT(n);

tests/bug75825.phpt

@@ -0,0 +1,77 @@
+--TEST--
+Bug #75825 (mailparse_uudecode_all doesn't parse multiple files)
+--SKIPIF--
+<?php
+if (!extension_loaded("mailparse")) die("skip mailparse extension not available");
+?>
+--FILE--
+<?php
+$data = <<<'EOD'
+begin 644 .profile
+M(R!^+RYP<F]F:6QE.B!E>&5C=71E9"!B>2!T:&4@8V]M;6%N9"!I;G1E<G!R
+M971E<B!F;W(@;&]G:6X@<VAE;&QS+@HC(%1H:7,@9FEL92!I<R!N;W0@<F5A
+M9"!B>2!B87-H*#$I+"!I9B!^+RYB87-H7W!R;V9I;&4@;W(@?B\N8F%S:%]L
+M;V=I;@HC(&5X:7-T<RX*(R!S964@+W5S<B]S:&%R92]D;V,O8F%S:"]E>&%M
+M<&QE<R]S=&%R='5P+69I;&5S(&9O<B!E>&%M<&QE<RX*(R!T:&4@9FEL97,@
+M87)E(&QO8V%T960@:6X@=&AE(&)A<V@M9&]C('!A8VMA9V4N"@HC('1H92!D
+M969A=6QT('5M87-K(&ES('-E="!I;B`O971C+W!R;V9I;&4[(&9O<B!S971T
+M:6YG('1H92!U;6%S:PHC(&9O<B!S<V@@;&]G:6YS+"!I;G-T86QL(&%N9"!C
+M;VYF:6=U<F4@=&AE(&QI8G!A;2UU;6%S:R!P86-K86=E+@HC=6UA<VL@,#(R
+M"@HC(&EF(')U;FYI;F<@8F%S:`II9B!;("UN("(D0D%32%]615)324].(B!=
+M.R!T:&5N"B`@("`C(&EN8VQU9&4@+F)A<VAR8R!I9B!I="!E>&ES=',*("`@
+M(&EF(%L@+68@(B1(3TU%+RYB87-H<F,B(%T[('1H96X*"2X@(B1(3TU%+RYB
+M87-H<F,B"B`@("!F:0IF:0H*(R!S970@4$%42"!S;R!I="!I;F-L=61E<R!U
+M<V5R)W,@<')I=F%T92!B:6X@:68@:70@97AI<W1S"FEF(%L@+60@(B1(3TU%
+M+V)I;B(@72`[('1H96X*("`@(%!!5$@](B1(3TU%+V)I;CHD4$%42"(*9FD*
+`
+end
+begin 644 .bash_logout
+M(R!^+RYB87-H7VQO9V]U=#H@97AE8W5T960@8GD@8F%S:"@Q*2!W:&5N(&QO
+M9VEN('-H96QL(&5X:71S+@H*(R!W:&5N(&QE879I;F<@=&AE(&-O;G-O;&4@
+M8VQE87(@=&AE('-C<F5E;B!T;R!I;F-R96%S92!P<FEV86-Y"@II9B!;("(D
+M4TA,5DPB(#T@,2!=.R!T:&5N"B`@("!;("UX("]U<W(O8FEN+V-L96%R7V-O
+H;G-O;&4@72`F)B`O=7-R+V)I;B]C;&5A<E]C;VYS;VQE("UQ"F9I"@``
+`
+end
+begin 644 .selected_editor
+`
+end
+
+EOD;
+$h = fopen('php://memory', 'w+');
+$h || die("Failed to open string!\n");
+fwrite($h, $data);
+rewind($h);
+$parsed = mailparse_uudecode_all($h);
+fclose($h);
+var_dump($parsed);
+?>
+--EXPECTF--
+array(4) {
+  [0]=>
+  array(1) {
+    ["filename"]=>
+    string(%d) "%s"
+  }
+  [1]=>
+  array(2) {
+    ["origfilename"]=>
+    string(8) ".profile"
+    ["filename"]=>
+    string(%d) "%s"
+  }
+  [2]=>
+  array(2) {
+    ["origfilename"]=>
+    string(12) ".bash_logout"
+    ["filename"]=>
+    string(%d) "%s"
+  }
+  [3]=>
+  array(2) {
+    ["origfilename"]=>
+    string(16) ".selected_editor"
+    ["filename"]=>
+    string(%d) "%s"
+  }
+}