Add a tiny JSON parser for private use by libvarnishapi.

lib/libvarnishapi/Makefile.am

@@ -12,6 +12,8 @@ lib_LTLIBRARIES = libvarnishapi.la
 libvarnishapi_la_LDFLAGS = $(AM_LDFLAGS) -version-info 1:6:0
 
 libvarnishapi_la_SOURCES = \
+	vjsn.c \
+	vjsn.h \
 	vsm_api.h \
 	vsl_api.h \
 	vxp.h \

lib/libvarnishapi/flint.lnt

 +fan
 
+-esym(759, VJSN_*)			// could be moved hdr->mod 
+-esym(765, VJSN_*)			// could be made static
 -esym(788, vex_rhs_e::*)
 -esym(788, VSL_transaction_e::*)
 -esym(769, vex_rhs_e::VEX__UNSET)

lib/libvarnishapi/vjsn.h

+/*-
+ * Copyright (c) 2017 Varnish Software AS
+ * All rights reserved.
+ *
+ * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+extern const char VJSN_OBJECT[];
+extern const char VJSN_ARRAY[];
+extern const char VJSN_NUMBER[];
+extern const char VJSN_STRING[];
+extern const char VJSN_TRUE[];
+extern const char VJSN_FALSE[];
+extern const char VJSN_NULL[];
+
+struct vjsn_val {
+	unsigned		magic;
+#define VJSN_VAL_MAGIC		0x08a06b80
+	const char		*type;
+	const char		*name;
+	VTAILQ_ENTRY(vjsn_val)	list;
+	VTAILQ_HEAD(,vjsn_val)	children;
+	char			*value;
+};
+
+struct vjsn {
+	unsigned		magic;
+#define VJSN_MAGIC		0x86a7f02b
+
+	char			*raw;
+	char			*ptr;
+	struct vjsn_val		*value;
+	const char		*err;
+};
+
+struct vjsn *vjsn_parse(const char *, const char **);
+void vjsn_dump(const struct vjsn *js, FILE *fo);