This file is indexed.

/usr/include/json-c/json_tokener.h is in libjson-c-dev 0.12.1-1.1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
/*
 * $Id: json_tokener.h,v 1.10 2006/07/25 03:24:50 mclark Exp $
 *
 * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
 * Michael Clark <michael@metaparadigm.com>
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the MIT license. See COPYING for details.
 *
 */

#ifndef _json_tokener_h_
#define _json_tokener_h_

#include <stddef.h>
#include "json_object.h"

#ifdef __cplusplus
extern "C" {
#endif

enum json_tokener_error {
  json_tokener_success,
  json_tokener_continue,
  json_tokener_error_depth,
  json_tokener_error_parse_eof,
  json_tokener_error_parse_unexpected,
  json_tokener_error_parse_null,
  json_tokener_error_parse_boolean,
  json_tokener_error_parse_number,
  json_tokener_error_parse_array,
  json_tokener_error_parse_object_key_name,
  json_tokener_error_parse_object_key_sep,
  json_tokener_error_parse_object_value_sep,
  json_tokener_error_parse_string,
  json_tokener_error_parse_comment,
  json_tokener_error_size
};

enum json_tokener_state {
  json_tokener_state_eatws,
  json_tokener_state_start,
  json_tokener_state_finish,
  json_tokener_state_null,
  json_tokener_state_comment_start,
  json_tokener_state_comment,
  json_tokener_state_comment_eol,
  json_tokener_state_comment_end,
  json_tokener_state_string,
  json_tokener_state_string_escape,
  json_tokener_state_escape_unicode,
  json_tokener_state_boolean,
  json_tokener_state_number,
  json_tokener_state_array,
  json_tokener_state_array_add,
  json_tokener_state_array_sep,
  json_tokener_state_object_field_start,
  json_tokener_state_object_field,
  json_tokener_state_object_field_end,
  json_tokener_state_object_value,
  json_tokener_state_object_value_add,
  json_tokener_state_object_sep,
  json_tokener_state_array_after_sep,
  json_tokener_state_object_field_start_after_sep,
  json_tokener_state_inf
};

struct json_tokener_srec
{
  enum json_tokener_state state, saved_state;
  struct json_object *obj;
  struct json_object *current;
  char *obj_field_name;
};

#define JSON_TOKENER_DEFAULT_DEPTH 32

struct json_tokener
{
  char *str;
  struct printbuf *pb;
  int max_depth, depth, is_double, st_pos, char_offset;
  enum json_tokener_error err;
  unsigned int ucs_char;
  char quote_char;
  struct json_tokener_srec *stack;
  int flags;
};

/**
 * Be strict when parsing JSON input.  Use caution with
 * this flag as what is considered valid may become more
 * restrictive from one release to the next, causing your
 * code to fail on previously working input.
 *
 * This flag is not set by default.
 *
 * @see json_tokener_set_flags()
 */
#define JSON_TOKENER_STRICT  0x01

/**
 * Given an error previously returned by json_tokener_get_error(),
 * return a human readable description of the error.
 *
 * @return a generic error message is returned if an invalid error value is provided.
 */
const char *json_tokener_error_desc(enum json_tokener_error jerr);

/**
 * Retrieve the error caused by the last call to json_tokener_parse_ex(),
 * or json_tokener_success if there is no error.
 *
 * When parsing a JSON string in pieces, if the tokener is in the middle
 * of parsing this will return json_tokener_continue.
 *
 * See also json_tokener_error_desc().
 */
enum json_tokener_error json_tokener_get_error(struct json_tokener *tok);

extern struct json_tokener* json_tokener_new(void);
extern struct json_tokener* json_tokener_new_ex(int depth);
extern void json_tokener_free(struct json_tokener *tok);
extern void json_tokener_reset(struct json_tokener *tok);
extern struct json_object* json_tokener_parse(const char *str);
extern struct json_object* json_tokener_parse_verbose(const char *str, enum json_tokener_error *error);

/**
 * Set flags that control how parsing will be done.
 */
extern void json_tokener_set_flags(struct json_tokener *tok, int flags);

/** 
 * Parse a string and return a non-NULL json_object if a valid JSON value
 * is found.  The string does not need to be a JSON object or array;
 * it can also be a string, number or boolean value.
 *
 * A partial JSON string can be parsed.  If the parsing is incomplete,
 * NULL will be returned and json_tokener_get_error() will be return 
 * json_tokener_continue.
 * json_tokener_parse_ex() can then be called with additional bytes in str
 * to continue the parsing.  
 *
 * If json_tokener_parse_ex() returns NULL and the error anything other than
 * json_tokener_continue, a fatal error has occurred and parsing must be
 * halted.  Then tok object must not be re-used until json_tokener_reset() is
 * called.
 *
 * When a valid JSON value is parsed, a non-NULL json_object will be
 * returned.  Also, json_tokener_get_error() will return json_tokener_success.
 * Be sure to check the type with json_object_is_type() or
 * json_object_get_type() before using the object.
 *
 * @b XXX this shouldn't use internal fields:
 * Trailing characters after the parsed value do not automatically cause an 
 * error.  It is up to the caller to decide whether to treat this as an
 * error or to handle the additional characters, perhaps by parsing another
 * json value starting from that point.
 *
 * Extra characters can be detected by comparing the tok->char_offset against
 * the length of the last len parameter passed in.
 *
 * The tokener does \b not maintain an internal buffer so the caller is
 * responsible for calling json_tokener_parse_ex with an appropriate str
 * parameter starting with the extra characters.
 *
 * This interface is presently not 64-bit clean due to the int len argument
 * so the function limits the maximum string size to INT32_MAX (2GB).
 * If the function is called with len == -1 then strlen is called to check
 * the string length is less than INT32_MAX (2GB)
 *
 * Example:
 * @code
json_object *jobj = NULL;
const char *mystring = NULL;
int stringlen = 0;
enum json_tokener_error jerr;
do {
	mystring = ...  // get JSON string, e.g. read from file, etc...
	stringlen = strlen(mystring);
	jobj = json_tokener_parse_ex(tok, mystring, stringlen);
} while ((jerr = json_tokener_get_error(tok)) == json_tokener_continue);
if (jerr != json_tokener_success)
{
	fprintf(stderr, "Error: %s\n", json_tokener_error_desc(jerr));
	// Handle errors, as appropriate for your application.
}
if (tok->char_offset < stringlen) // XXX shouldn't access internal fields
{
	// Handle extra characters after parsed object as desired.
	// e.g. issue an error, parse another object from that point, etc...
}
// Success, use jobj here.

@endcode
 *
 * @param tok a json_tokener previously allocated with json_tokener_new()
 * @param str an string with any valid JSON expression, or portion of.  This does not need to be null terminated.
 * @param len the length of str
 */
extern struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
						 const char *str, int len);

#ifdef __cplusplus
}
#endif

#endif