lejp: add test app to parse stdin

CMakeLists.txt

@@ -1492,6 +1492,17 @@ if (NOT LWS_WITHOUT_TESTAPPS)
 			endif(WIN32)
 		endif()
 
+		if (LWS_WITH_LEJP)
+			create_test_app(
+				test-lejp
+				"test-apps/test-lejp.c"
+				""
+				""
+				""
+				""
+				"")
+		endif()
+
 		#
 		# test-server-v2.0
 		#

lib/misc/lejp.c

@@ -160,7 +160,8 @@ lejp_get_wildcard(struct lejp_ctx *ctx, int wildcard, char *dest, int len)
 
 	n = ctx->wild[wildcard];
 
-	while (--len && n < ctx->ppos && (n == ctx->wild[wildcard] || ctx->path[n] != '.'))
+	while (--len && n < ctx->ppos &&
+	       (n == ctx->wild[wildcard] || ctx->path[n] != '.'))
 		*dest++ = ctx->path[n++];
 
 	*dest = '\0';

test-apps/test-lejp.c

@@ -0,0 +1,116 @@
+/*
+ * Lightweight Embedded JSON Parser
+ *
+ * Copyright (C) 2013-2017 Andy Green <andy@warmcat.com>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation:
+ *  version 2.1 of the License.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ *  MA  02110-1301  USA
+ */
+
+#include <libwebsockets.h>
+#include <string.h>
+
+
+static const char * const reason_names[] = {
+	"LEJPCB_CONSTRUCTED",
+	"LEJPCB_DESTRUCTED",
+	"LEJPCB_START",
+	"LEJPCB_COMPLETE",
+	"LEJPCB_FAILED",
+	"LEJPCB_PAIR_NAME",
+	"LEJPCB_VAL_TRUE",
+	"LEJPCB_VAL_FALSE",
+	"LEJPCB_VAL_NULL",
+	"LEJPCB_VAL_NUM_INT",
+	"LEJPCB_VAL_NUM_FLOAT",
+	"LEJPCB_VAL_STR_START",
+	"LEJPCB_VAL_STR_CHUNK",
+	"LEJPCB_VAL_STR_END",
+	"LEJPCB_ARRAY_START",
+	"LEJPCB_ARRAY_END",
+	"LEJPCB_OBJECT_START",
+	"LEJPCB_OBJECT_END",
+};
+
+static const char * const tok[] = {
+	"dummy___"
+};
+
+static signed char
+cb(struct lejp_ctx *ctx, char reason)
+{
+	char buf[1024], *p = buf, *end = &buf[sizeof(buf)];
+	int n;
+
+	if (reason & LEJP_FLAG_CB_IS_VALUE) {
+		p += lws_snprintf(p, p - end, "   value '%s' ", ctx->buf);
+		if (ctx->ipos) {
+			p += lws_snprintf(p, p - end, "(array indexes: ");
+			for (n = 0; n < ctx->ipos; n++)
+				p += lws_snprintf(p, p - end, "%d ", ctx->i[n]);
+			p += lws_snprintf(p, p - end, ") ");
+		}
+		lwsl_notice("%s (%s)\r\n", buf,
+		       reason_names[(unsigned int)
+			(reason) & (LEJP_FLAG_CB_IS_VALUE - 1)]);
+		return 0;
+	}
+
+	switch (reason) {
+	case LEJPCB_COMPLETE:
+		lwsl_notice("Parsing Completed (LEJPCB_COMPLETE)\n");
+		break;
+	case LEJPCB_PAIR_NAME:
+		lwsl_notice("path: '%s' (LEJPCB_PAIR_NAME)\n", ctx->path);
+		break;
+	}
+
+	return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+	int fd, n = 1, ret = 1, m;
+	struct lejp_ctx ctx;
+	char buf[128];
+
+	lws_set_log_level(7, NULL);
+
+	lwsl_notice("libwebsockets-test-lejp  (C)2017 andy@warmcat.com\n");
+	lwsl_notice("  usage: cat my.json | libwebsockets-test-lejp\n\n");
+
+	lejp_construct(&ctx, cb, NULL, tok, ARRAY_SIZE(tok));
+
+	fd = 0;
+
+	while (n > 0) {
+		n = read(fd, buf, sizeof(buf));
+		if (n <= 0)
+			continue;
+
+		m = lejp_parse(&ctx, (uint8_t *)buf, n);
+		if (m < 0 && m != LEJP_CONTINUE) {
+			lwsl_err("parse failed %d\n", m);
+			goto bail;
+		}
+	}
+	lwsl_notice("okay\n");
+	ret = 0;
+bail:
+	lejp_destruct(&ctx);
+
+	return ret;
+}