Add --strip-comments option

Makefile.am

@@ -141,7 +141,7 @@ endif
 
 ### Tests (make check)
 
-TESTS = tests/mantest tests/jqtest tests/shtest tests/utf8test tests/base64test
+TESTS = tests/mantest tests/jqtest tests/shtest tests/utf8test tests/base64test tests/commenttest
 if !WIN32
 TESTS += tests/optionaltest
 endif
@@ -233,6 +233,7 @@ EXTRA_DIST = $(DOC_FILES) $(man_MANS) $(TESTS) $(TEST_LOG_COMPILER)     \
         tests/setup tests/torture/input0.json                           \
         tests/optional.test tests/man.test tests/manonig.test           \
         tests/jq.test tests/onig.test tests/base64.test                 \
+        tests/commenttest                                               \
         tests/utf8-truncate.jq tests/jq-f-test.sh                       \
         tests/no-main-program.jq tests/yes-main-program.jq
 

src/jv.h

@@ -234,6 +234,7 @@ enum {
   JV_PARSE_SEQ              = 1,
   JV_PARSE_STREAMING        = 2,
   JV_PARSE_STREAM_ERRORS    = 4,
+  JV_PARSE_STRIP_COMMENTS   = 8
 };
 
 jv jv_parse(const char* string);

src/jv_parse.c

@@ -652,7 +652,6 @@ static pfunc scan_line_comment(struct jv_parser* p, char ch, jv* out) {
   return OK;
 }
 
-
 static pfunc scan_c_comment_close(struct jv_parser* p, char ch, jv* out) {
   if(ch == '/') {
     p->scan = scan_json;
@@ -703,11 +702,7 @@ static pfunc scan_json(struct jv_parser* p, char ch, jv* out) {
   presult answer = 0;
   p->last_ch_was_ws = 0;
   if (p->st == JV_PARSER_NORMAL) {
-    if(ch == '#') {
-      p->scan = scan_line_comment;
-      return OK;
-    }
-    if(ch == '/') {
+    if(ch == '/' && (p->flags & JV_PARSE_STRIP_COMMENTS)) {
       p->scan = scan_slash_comment;
       return OK;
     }

src/main.c

@@ -88,6 +88,7 @@ static void usage(int code, int keep_it_short) {
       "  -C, --color-output        colorize JSON output;\n"
       "  -M, --monochrome-output   disable colored output;\n"
       "      --tab                 use tabs for indentation;\n"
+      "      --strip-comments      accept and strip comments from input;\n"
       "      --indent n            use n spaces for indentation (max 7 spaces);\n"
       "      --unbuffered          flush output stream after each output;\n"
       "      --stream              parse the input value in streaming fashion;\n"
@@ -471,6 +472,10 @@ int main(int argc, char* argv[]) {
         parser_flags |= JV_PARSE_STREAMING;
         continue;
       }
+      if (isoption(argv[i], 0, "strip-comments", &short_opts)) {
+        parser_flags |= JV_PARSE_STRIP_COMMENTS;
+        continue;
+      }
       if (isoption(argv[i], 0, "stream-errors", &short_opts)) {
         parser_flags |= JV_PARSE_STREAMING | JV_PARSE_STREAM_ERRORS;
         continue;

tests/commenttest

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+. "${0%/*}/setup" "$@"
+
+if [ "$(echo '{"hi":"there"/*comment*/}' | $VALGRIND $Q $JQ --strip-comments '.hi')" != '"there"' ]; then
+	echo "C-style comment test failed"
+	exit 1
+fi
+
+if [ "$(printf '{"hi"://comment\n"there"}' | $VALGRIND $Q $JQ --strip-comments '.hi')" != '"there"' ]; then
+	echo "C++-style comment test failed"
+	exit 1
+fi
+
+exit 0