Dogcows Code - chaz/yoink/blob - yajl/verify/json_verify.c

   1 /*
   2  * Copyright 2007-2009, Lloyd Hilaiel.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *  1. Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *  2. Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in
  13  *     the documentation and/or other materials provided with the
  14  *     distribution.
  15  *
  16  *  3. Neither the name of Lloyd Hilaiel nor the names of its
  17  *     contributors may be used to endorse or promote products derived
  18  *     from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <yajl/yajl_parse.h>
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 static void
  40 usage(const char * progname)
  41 {
  42     fprintf(stderr, "%s: validate json from stdin\n"
  43                     "usage: json_verify [options]\n"
  44                     "    -q quiet mode\n"
  45                     "    -c allow comments\n"
  46                     "    -u allow invalid utf8 inside strings\n",
  47             progname);
  48     exit(1);
  49 }
  50
  51 int
  52 main(int argc, char ** argv)
  53 {
  54     yajl_status stat;
  55     size_t rd;
  56     yajl_handle hand;
  57     static unsigned char fileData[65536];
  58     int quiet = 0;
  59         int retval = 0, done = 0;
  60     yajl_parser_config cfg = { 0, 1 };
  61
  62     /* check arguments.*/
  63     if (argc > 1 && argc < 4) {
  64         int i;
  65
  66         for (i=1; i < argc;i++) {
  67             if (!strcmp("-q", argv[i])) {
  68                 quiet = 1;
  69             } else if (!strcmp("-c", argv[i])) {
  70                 cfg.allowComments = 1;
  71             } else if (!strcmp("-u", argv[i])) {
  72                 cfg.checkUTF8 = 0;
  73             } else {
  74                 fprintf(stderr, "unrecognized option: '%s'\n\n", argv[i]);
  75                 usage(argv[0]);
  76             }
  77         }
  78     } else if (argc != 1) {
  79         usage(argv[0]);
  80     }
  81
  82     /* allocate a parser */
  83     hand = yajl_alloc(NULL, &cfg, NULL, NULL);
  84
  85         while (!done) {
  86         rd = fread((void *) fileData, 1, sizeof(fileData) - 1, stdin);
  87
  88         retval = 0;
  89
  90         if (rd == 0) {
  91             if (!feof(stdin)) {
  92                 if (!quiet) {
  93                     fprintf(stderr, "error encountered on file read\n");
  94                 }
  95                 retval = 1;
  96                 break;
  97             }
  98             done = 1;
  99         }
 100         fileData[rd] = 0;
 101
 102         if (done)
 103             /* parse any remaining buffered data */
 104             stat = yajl_parse_complete(hand);
 105         else
 106             /* read file data, pass to parser */
 107             stat = yajl_parse(hand, fileData, rd);
 108
 109         if (stat != yajl_status_ok &&
 110             stat != yajl_status_insufficient_data)
 111         {
 112             if (!quiet) {
 113                 unsigned char * str = yajl_get_error(hand, 1, fileData, rd);
 114                 fprintf(stderr, (const char *) str);
 115                 yajl_free_error(hand, str);
 116             }
 117             retval = 1;
 118             break;
 119         }
 120     }
 121
 122     yajl_free(hand);
 123
 124     if (!quiet) {
 125         printf("JSON is %s\n", retval ? "invalid" : "valid");
 126     }
 127
 128     return retval;
 129 }