Implement JSON printing function

examples/empack_cli.c

@@ -0,0 +1,50 @@
+#include <sys/stat.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "empack.h"
+
+#define USAGE                                                          \
+"empack_cli [OPTIONS] <file | msgpack hex>\r\n"                        \
+"    file: File to read binary Msgpack data from, \"-\" for stdin\r\n" \
+"    msgpack hex: Hex string of Msgpack data\r\n"                      \
+"\r\n"                                                                 \
+"OPTIONS\r\n"                                                          \
+"    -h/--help: Print this message\r\n"
+
+static void
+print_func(const char *buf, uint32_t buflen, void *arg)
+{
+    printf("%.*s", buflen, buf);
+}
+
+int
+main(int argc, char **argv)
+{
+    const uint8_t input[] = { 0x82, 0xa7, 0x63, 0x6f, 0x6d, 0x70, 0x61, 0x63, 0x74, 0xc3, 0xa6, 0x73, 0x63, 0x68, 0x65, 0x6d, 0x61, 0x00 };
+    size_t input_len = sizeof(input);
+    empack_t empack;
+    uint8_t arena[256];
+    uint32_t chars_printed;
+
+    empack_init(&empack, arena, sizeof(arena));
+
+    if (empack_parse(&empack, input, input_len)) {
+        fprintf(stderr, "Parsing error\r\n");
+        return (-1);
+    }
+
+    chars_printed = empack_print(&empack, print_func, NULL, "  ");
+    printf("\r\n-- Stats --\r\n"
+           "Characters Printed: %u\r\n"
+           "Arena Memory Used:  %u/%uB (%u%%)\r\n"
+           "-----------\r\n",
+           chars_printed,
+           empack.arena_used,
+           empack.arena_sz,
+           (empack.arena_used * 100) / empack.arena_sz);
+
+    return (0);
+}