[lexer] Fix problem with lexing multi-line strings

src/lexembuffer.c

@@ -230,15 +230,17 @@ void putStringConstantLexem(LexemBuffer *lb, CharacterBuffer *cb, int lexemStart
             size++;
             if (size < MAX_LEXEM_SIZE - 10)
                 putLexemChar(lb, ch);
-            /* TODO escape sequences */
             if (ch == '\n') {
+                /* Escaped newline inside string */
                 cb->lineNumber++;
                 cb->lineBegin    = cb->nextUnread;
                 cb->columnOffset = 0;
             }
-            continue;
+            /* TODO other escape sequences */
+            ch = 0;             /* TODO Not sure why 0, but 'continue' does not work... */
         }
         if (ch == '\n') {
+            /* Unescaped newline inside string */
             cb->lineNumber++;
             cb->lineBegin    = cb->nextUnread;
             cb->columnOffset = 0;

tests/test_multiline_string_lexing/Makefile

@@ -0,0 +1,16 @@
+include ../Makefile.boilerplate
+
+COMMAND = ../../src/c-xref -xrefrc .c-xrefrc source.c
+
+# This test will always succeed unless c-xref fails, it used to hang on unterminated macro
+$(TEST): clean
+	@$(COMMAND) -o output.tmp
+	@$(NORMALIZE) output.tmp >> output
+	@$(OK)
+	@exit 0
+
+clean:
+	@-rm -rf CXrefs output.log output.tmp output
+
+debug:
+	gdb --args $(COMMAND) -log=log -trace

tests/test_multiline_string_lexing/source.c

@@ -0,0 +1,9 @@
+#define svg(...) printf(__VA_ARGS__)
+
+svg("<?xml version=\"1.0\" standalone=\"no\"?>\n"
+    "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" "
+    "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
+
+char *multi_line = "
+some more characters\
+";