18a2d737cSLawrence Tang /** 28a2d737cSLawrence Tang * A very basic, non-complete implementation of a validator for the JSON Schema specification, 38a2d737cSLawrence Tang * for validating CPER-JSON. 48a2d737cSLawrence Tang * 58a2d737cSLawrence Tang * Author: Lawrence.Tang@arm.com 68a2d737cSLawrence Tang **/ 78a2d737cSLawrence Tang 88a2d737cSLawrence Tang #include <stdio.h> 98a2d737cSLawrence Tang #include <string.h> 108a2d737cSLawrence Tang #include <unistd.h> 118a2d737cSLawrence Tang #include <libgen.h> 128a2d737cSLawrence Tang #include <limits.h> 138f793ac3SLawrence Tang #include <stdarg.h> 148a2d737cSLawrence Tang #include "json.h" 158a2d737cSLawrence Tang #include "json-schema.h" 168a2d737cSLawrence Tang #include "edk/BaseTypes.h" 178a2d737cSLawrence Tang 188f793ac3SLawrence Tang //Field definitions. 198f793ac3SLawrence Tang int json_validator_debug = 0; 208f793ac3SLawrence Tang 218a2d737cSLawrence Tang //Private pre-definitions. 22*e407b4c8SLawrence Tang int validate_field(const char *name, json_object *schema, json_object *object, 23*e407b4c8SLawrence Tang char *error_message); 24*e407b4c8SLawrence Tang int validate_integer(const char *field_name, json_object *schema, 25*e407b4c8SLawrence Tang json_object *object, char *error_message); 26*e407b4c8SLawrence Tang int validate_string(const char *field_name, json_object *schema, 27*e407b4c8SLawrence Tang json_object *object, char *error_message); 28*e407b4c8SLawrence Tang int validate_object(const char *field_name, json_object *schema, 29*e407b4c8SLawrence Tang json_object *object, char *error_message); 30*e407b4c8SLawrence Tang int validate_array(const char *field_name, json_object *schema, 31*e407b4c8SLawrence Tang json_object *object, char *error_message); 328f793ac3SLawrence Tang void log_validator_error(char *error_message, const char *format, ...); 338f793ac3SLawrence Tang void log_validator_debug(const char *format, ...); 348f793ac3SLawrence Tang void log_validator_msg(const char *format, va_list args); 358a2d737cSLawrence Tang 368a2d737cSLawrence Tang //Validates a single JSON object against a provided schema file, returning 1 on success and 0 on failure to validate. 378a2d737cSLawrence Tang //Error message space must be allocated prior to call. 38*e407b4c8SLawrence Tang int validate_schema_from_file(const char *schema_file, json_object *object, 39*e407b4c8SLawrence Tang char *error_message) 408a2d737cSLawrence Tang { 418a2d737cSLawrence Tang //Load schema IR from file. 428a2d737cSLawrence Tang json_object *schema_ir = json_object_from_file(schema_file); 43*e407b4c8SLawrence Tang if (schema_ir == NULL) { 44*e407b4c8SLawrence Tang log_validator_error(error_message, 45*e407b4c8SLawrence Tang "Failed to load schema from file '%s'.", 46*e407b4c8SLawrence Tang schema_file); 478a2d737cSLawrence Tang return 0; 488a2d737cSLawrence Tang } 498a2d737cSLawrence Tang 508a2d737cSLawrence Tang //Get the directory of the file. 518a2d737cSLawrence Tang char *schema_file_copy = malloc(strlen(schema_file) + 1); 528a2d737cSLawrence Tang strcpy(schema_file_copy, schema_file); 538a2d737cSLawrence Tang char *schema_dir = dirname(schema_file_copy); 548a2d737cSLawrence Tang 55*e407b4c8SLawrence Tang int result = 56*e407b4c8SLawrence Tang validate_schema(schema_ir, schema_dir, object, error_message); 578a2d737cSLawrence Tang 588a2d737cSLawrence Tang //Free memory from directory call. 598a2d737cSLawrence Tang free(schema_file_copy); 608a2d737cSLawrence Tang 618a2d737cSLawrence Tang return result; 628a2d737cSLawrence Tang } 638a2d737cSLawrence Tang 648a2d737cSLawrence Tang //Validates a single JSON object against a provided schema, returning 1 on success and 0 on failure to validate. 658a2d737cSLawrence Tang //Error message space must be allocated prior to call. 668a2d737cSLawrence Tang //If the schema does not include any other sub-schemas using "$ref", then leaving schema_directory as NULL is valid. 67*e407b4c8SLawrence Tang int validate_schema(json_object *schema, char *schema_directory, 68*e407b4c8SLawrence Tang json_object *object, char *error_message) 698a2d737cSLawrence Tang { 708a2d737cSLawrence Tang //Check that the schema version is the same as this validator. 718a2d737cSLawrence Tang json_object *schema_ver = json_object_object_get(schema, "$schema"); 72*e407b4c8SLawrence Tang if (schema_ver == NULL || 73*e407b4c8SLawrence Tang strcmp(json_object_get_string(schema_ver), JSON_SCHEMA_VERSION)) { 74*e407b4c8SLawrence Tang log_validator_error( 75*e407b4c8SLawrence Tang error_message, 76*e407b4c8SLawrence Tang "Provided schema is not of the same version that is referenced by this validator, or is not a schema."); 778a2d737cSLawrence Tang return 0; 788a2d737cSLawrence Tang } 798a2d737cSLawrence Tang 808a2d737cSLawrence Tang //Change current directory into the schema directory. 818a2d737cSLawrence Tang char *original_cwd = malloc(PATH_MAX); 82*e407b4c8SLawrence Tang if (getcwd(original_cwd, PATH_MAX) == NULL) { 83*e407b4c8SLawrence Tang log_validator_error(error_message, 84*e407b4c8SLawrence Tang "Failed fetching the current directory."); 858a2d737cSLawrence Tang return 0; 868a2d737cSLawrence Tang } 87*e407b4c8SLawrence Tang if (chdir(schema_directory)) { 88*e407b4c8SLawrence Tang log_validator_error(error_message, 89*e407b4c8SLawrence Tang "Failed to chdir into schema directory."); 908a2d737cSLawrence Tang return 0; 918a2d737cSLawrence Tang } 928a2d737cSLawrence Tang 938a2d737cSLawrence Tang //Parse the top level structure appropriately. 948a2d737cSLawrence Tang int result = validate_field("parent", schema, object, error_message); 958a2d737cSLawrence Tang 968a2d737cSLawrence Tang //Change back to original CWD. 978a2d737cSLawrence Tang chdir(original_cwd); 988a2d737cSLawrence Tang free(original_cwd); 998a2d737cSLawrence Tang 100d34f2b11SLawrence Tang if (result) 101*e407b4c8SLawrence Tang log_validator_debug( 102*e407b4c8SLawrence Tang "Successfully validated the provided object against schema."); 1038a2d737cSLawrence Tang return result; 1048a2d737cSLawrence Tang } 1058a2d737cSLawrence Tang 1068a2d737cSLawrence Tang //Validates a single JSON field given a schema/object. 1078f793ac3SLawrence Tang //Returns -1 on fatal/error failure, 0 on validation failure, and 1 on validation. 108*e407b4c8SLawrence Tang int validate_field(const char *field_name, json_object *schema, 109*e407b4c8SLawrence Tang json_object *object, char *error_message) 1108a2d737cSLawrence Tang { 1118f793ac3SLawrence Tang log_validator_debug("Validating field '%s'...", field_name); 1128f793ac3SLawrence Tang 1138a2d737cSLawrence Tang //If there is a "$ref" field, attempt to load the referenced schema. 1148a2d737cSLawrence Tang json_object *ref_schema = json_object_object_get(schema, "$ref"); 115*e407b4c8SLawrence Tang if (ref_schema != NULL && 116*e407b4c8SLawrence Tang json_object_get_type(ref_schema) == json_type_string) { 117*e407b4c8SLawrence Tang log_validator_debug("$ref schema detected for field '%s'.", 118*e407b4c8SLawrence Tang field_name); 1198f793ac3SLawrence Tang 1208a2d737cSLawrence Tang //Attempt to load. If loading fails, report error. 1218a2d737cSLawrence Tang const char *ref_path = json_object_get_string(ref_schema); 1228a2d737cSLawrence Tang schema = json_object_from_file(ref_path); 123*e407b4c8SLawrence Tang if (schema == NULL) { 124*e407b4c8SLawrence Tang log_validator_error( 125*e407b4c8SLawrence Tang error_message, 126*e407b4c8SLawrence Tang "Failed to open referenced schema file '%s'.", 127*e407b4c8SLawrence Tang ref_path); 1288f793ac3SLawrence Tang return -1; 1298a2d737cSLawrence Tang } 1308f793ac3SLawrence Tang 131*e407b4c8SLawrence Tang log_validator_debug("loaded schema path '%s' for field '%s'.", 132*e407b4c8SLawrence Tang ref_path, field_name); 1338a2d737cSLawrence Tang } 1348a2d737cSLawrence Tang 1358a2d737cSLawrence Tang //Get the schema field type. 136*e407b4c8SLawrence Tang json_object *desired_field_type = 137*e407b4c8SLawrence Tang json_object_object_get(schema, "type"); 138*e407b4c8SLawrence Tang if (desired_field_type == NULL || 139*e407b4c8SLawrence Tang !json_object_is_type(desired_field_type, json_type_string)) { 140*e407b4c8SLawrence Tang log_validator_error( 141*e407b4c8SLawrence Tang error_message, 142*e407b4c8SLawrence Tang "Desired field type not provided within schema/is not a string for field '%s' (schema violation).", 143*e407b4c8SLawrence Tang field_name); 1448f793ac3SLawrence Tang return -1; 1458a2d737cSLawrence Tang } 1468a2d737cSLawrence Tang 1478a2d737cSLawrence Tang //Check the field types are actually equal. 148*e407b4c8SLawrence Tang const char *desired_field_type_str = 149*e407b4c8SLawrence Tang json_object_get_string(desired_field_type); 150*e407b4c8SLawrence Tang if (!((!strcmp(desired_field_type_str, "object") && 151*e407b4c8SLawrence Tang json_object_is_type(object, json_type_object)) || 152*e407b4c8SLawrence Tang (!strcmp(desired_field_type_str, "array") && 153*e407b4c8SLawrence Tang json_object_is_type(object, json_type_array)) || 154*e407b4c8SLawrence Tang (!strcmp(desired_field_type_str, "integer") && 155*e407b4c8SLawrence Tang json_object_is_type(object, json_type_int)) || 156*e407b4c8SLawrence Tang (!strcmp(desired_field_type_str, "string") && 157*e407b4c8SLawrence Tang json_object_is_type(object, json_type_string)) || 158*e407b4c8SLawrence Tang (!strcmp(desired_field_type_str, "boolean") && 159*e407b4c8SLawrence Tang json_object_is_type(object, json_type_boolean)) || 160*e407b4c8SLawrence Tang (!strcmp(desired_field_type_str, "double") && 161*e407b4c8SLawrence Tang json_object_is_type(object, json_type_double)))) { 162*e407b4c8SLawrence Tang log_validator_error(error_message, 163*e407b4c8SLawrence Tang "Field type match failed for field '%s'.", 164*e407b4c8SLawrence Tang field_name); 1658a2d737cSLawrence Tang return 0; 1668a2d737cSLawrence Tang } 1678a2d737cSLawrence Tang 1688f793ac3SLawrence Tang //If the schema contains a "oneOf" array, we need to validate the field against each of the 1698f793ac3SLawrence Tang //possible options in turn. 1708f793ac3SLawrence Tang json_object *one_of = json_object_object_get(schema, "oneOf"); 171*e407b4c8SLawrence Tang if (one_of != NULL && json_object_get_type(one_of) == json_type_array) { 172*e407b4c8SLawrence Tang log_validator_debug("oneOf options detected for field '%s'.", 173*e407b4c8SLawrence Tang field_name); 1748f793ac3SLawrence Tang 1758f793ac3SLawrence Tang int len = json_object_array_length(one_of); 1768f793ac3SLawrence Tang int validated = 0; 177*e407b4c8SLawrence Tang for (int i = 0; i < len; i++) { 1788f793ac3SLawrence Tang //If the "oneOf" member isn't an object, warn on schema violation. 179*e407b4c8SLawrence Tang json_object *one_of_option = 180*e407b4c8SLawrence Tang json_object_array_get_idx(one_of, i); 181*e407b4c8SLawrence Tang if (one_of_option == NULL || 182*e407b4c8SLawrence Tang json_object_get_type(one_of_option) != 183*e407b4c8SLawrence Tang json_type_object) { 184*e407b4c8SLawrence Tang log_validator_debug( 185*e407b4c8SLawrence Tang "Schema Warning: 'oneOf' member for field '%s' is not an object, schema violation.", 186*e407b4c8SLawrence Tang field_name); 1878f793ac3SLawrence Tang continue; 1888f793ac3SLawrence Tang } 1898f793ac3SLawrence Tang 1908f793ac3SLawrence Tang //Validate field with schema. 191*e407b4c8SLawrence Tang validated = validate_field(field_name, one_of_option, 192*e407b4c8SLawrence Tang object, error_message); 1938f793ac3SLawrence Tang if (validated == -1) 1948f793ac3SLawrence Tang return -1; 1958f793ac3SLawrence Tang if (validated) 1968f793ac3SLawrence Tang break; 1978f793ac3SLawrence Tang } 1988f793ac3SLawrence Tang 1998f793ac3SLawrence Tang //Return if failed all checks. 200*e407b4c8SLawrence Tang if (!validated) { 201*e407b4c8SLawrence Tang log_validator_error( 202*e407b4c8SLawrence Tang error_message, 203*e407b4c8SLawrence Tang "No schema object structures matched provided object for field '%s'.", 204*e407b4c8SLawrence Tang field_name); 2058f793ac3SLawrence Tang return 0; 2068f793ac3SLawrence Tang } 2078f793ac3SLawrence Tang } 20845e04b0aSLawrence Tang 2098a2d737cSLawrence Tang //Switch and validate each type in turn. 210*e407b4c8SLawrence Tang switch (json_object_get_type(object)) { 2118a2d737cSLawrence Tang case json_type_int: 212*e407b4c8SLawrence Tang return validate_integer(field_name, schema, object, 213*e407b4c8SLawrence Tang error_message); 2148a2d737cSLawrence Tang case json_type_string: 215*e407b4c8SLawrence Tang return validate_string(field_name, schema, object, 216*e407b4c8SLawrence Tang error_message); 2178a2d737cSLawrence Tang case json_type_object: 218*e407b4c8SLawrence Tang return validate_object(field_name, schema, object, 219*e407b4c8SLawrence Tang error_message); 2208a2d737cSLawrence Tang case json_type_array: 221*e407b4c8SLawrence Tang return validate_array(field_name, schema, object, 222*e407b4c8SLawrence Tang error_message); 2238a2d737cSLawrence Tang 2248a2d737cSLawrence Tang //We don't perform extra validation on this type. 2258a2d737cSLawrence Tang default: 226*e407b4c8SLawrence Tang log_validator_debug( 227*e407b4c8SLawrence Tang "validation passed for '%s' (no extra validation).", 228*e407b4c8SLawrence Tang field_name); 2298a2d737cSLawrence Tang return 1; 2308a2d737cSLawrence Tang } 2318a2d737cSLawrence Tang } 2328a2d737cSLawrence Tang 2338a2d737cSLawrence Tang //Validates a single integer value according to the given specification. 234*e407b4c8SLawrence Tang int validate_integer(const char *field_name, json_object *schema, 235*e407b4c8SLawrence Tang json_object *object, char *error_message) 2368a2d737cSLawrence Tang { 2378a2d737cSLawrence Tang //Is there a minimum/maximum specified? If so, check those. 2388a2d737cSLawrence Tang //Validate minimum. 2398a2d737cSLawrence Tang json_object *min_value = json_object_object_get(schema, "minimum"); 240*e407b4c8SLawrence Tang if (min_value != NULL && 241*e407b4c8SLawrence Tang json_object_is_type(min_value, json_type_int)) { 2428a2d737cSLawrence Tang int min_value_int = json_object_get_int(min_value); 243*e407b4c8SLawrence Tang if (json_object_get_uint64(object) < min_value_int) { 244*e407b4c8SLawrence Tang log_validator_error( 245*e407b4c8SLawrence Tang error_message, 246*e407b4c8SLawrence Tang "Failed to validate integer field '%s'. Value was below minimum of %d.", 247*e407b4c8SLawrence Tang field_name, min_value_int); 2488a2d737cSLawrence Tang return 0; 2498a2d737cSLawrence Tang } 2508a2d737cSLawrence Tang } 2518a2d737cSLawrence Tang 2528a2d737cSLawrence Tang //Validate maximum. 2538a2d737cSLawrence Tang json_object *max_value = json_object_object_get(schema, "maximum"); 254*e407b4c8SLawrence Tang if (max_value != NULL && 255*e407b4c8SLawrence Tang json_object_is_type(max_value, json_type_int)) { 2568a2d737cSLawrence Tang int max_value_int = json_object_get_int(max_value); 257*e407b4c8SLawrence Tang if (json_object_get_uint64(object) > max_value_int) { 258*e407b4c8SLawrence Tang log_validator_error( 259*e407b4c8SLawrence Tang error_message, 260*e407b4c8SLawrence Tang "Failed to validate integer field '%s'. Value was above maximum of %d.", 261*e407b4c8SLawrence Tang field_name, max_value_int); 2628a2d737cSLawrence Tang return 0; 2638a2d737cSLawrence Tang } 2648a2d737cSLawrence Tang } 2658a2d737cSLawrence Tang 2668a2d737cSLawrence Tang return 1; 2678a2d737cSLawrence Tang } 2688a2d737cSLawrence Tang 2698a2d737cSLawrence Tang //Validates a single string value according to the given specification. 270*e407b4c8SLawrence Tang int validate_string(const char *field_name, json_object *schema, 271*e407b4c8SLawrence Tang json_object *object, char *error_message) 2728a2d737cSLawrence Tang { 2738a2d737cSLawrence Tang //todo: if there is a "pattern" field, verify the string with RegEx. 2748a2d737cSLawrence Tang return 1; 2758a2d737cSLawrence Tang } 2768a2d737cSLawrence Tang 2778a2d737cSLawrence Tang //Validates a single object value according to the given specification. 278*e407b4c8SLawrence Tang int validate_object(const char *field_name, json_object *schema, 279*e407b4c8SLawrence Tang json_object *object, char *error_message) 2808a2d737cSLawrence Tang { 2818a2d737cSLawrence Tang //Are there a set of "required" fields? If so, check they all exist. 282*e407b4c8SLawrence Tang json_object *required_fields = 283*e407b4c8SLawrence Tang json_object_object_get(schema, "required"); 284*e407b4c8SLawrence Tang if (required_fields != NULL && 285*e407b4c8SLawrence Tang json_object_get_type(required_fields) == json_type_array) { 286*e407b4c8SLawrence Tang log_validator_debug( 287*e407b4c8SLawrence Tang "Required fields found for '%s', matching...", 288*e407b4c8SLawrence Tang field_name); 2898f793ac3SLawrence Tang 2908a2d737cSLawrence Tang int len = json_object_array_length(required_fields); 291*e407b4c8SLawrence Tang for (int i = 0; i < len; i++) { 2928a2d737cSLawrence Tang //Get the required field from schema. 293*e407b4c8SLawrence Tang json_object *required_field = 294*e407b4c8SLawrence Tang json_object_array_get_idx(required_fields, i); 295*e407b4c8SLawrence Tang if (json_object_get_type(required_field) != 296*e407b4c8SLawrence Tang json_type_string) { 297*e407b4c8SLawrence Tang log_validator_error( 298*e407b4c8SLawrence Tang error_message, 299*e407b4c8SLawrence Tang "Required field for object '%s' is not a string (schema violation).", 300*e407b4c8SLawrence Tang field_name); 3018a2d737cSLawrence Tang return 0; 3028a2d737cSLawrence Tang } 3038a2d737cSLawrence Tang 3048a2d737cSLawrence Tang //Does it exist in the object? 305*e407b4c8SLawrence Tang const char *required_field_str = 306*e407b4c8SLawrence Tang json_object_get_string(required_field); 307*e407b4c8SLawrence Tang if (json_object_object_get( 308*e407b4c8SLawrence Tang object, required_field_str) == NULL) { 309*e407b4c8SLawrence Tang log_validator_error( 310*e407b4c8SLawrence Tang error_message, 311*e407b4c8SLawrence Tang "Required field '%s' was not present in object '%s'.", 312*e407b4c8SLawrence Tang required_field_str, field_name); 3138a2d737cSLawrence Tang return 0; 3148a2d737cSLawrence Tang } 3158a2d737cSLawrence Tang } 3168a2d737cSLawrence Tang } 3178a2d737cSLawrence Tang 318c4814594SLawrence Tang //Get additional properties value in advance. 319*e407b4c8SLawrence Tang json_object *additional_properties = 320*e407b4c8SLawrence Tang json_object_object_get(schema, "additionalProperties"); 321c4814594SLawrence Tang int additional_properties_allowed = 0; 322*e407b4c8SLawrence Tang if (additional_properties != NULL && 323*e407b4c8SLawrence Tang json_object_get_type(additional_properties) == json_type_boolean) 324*e407b4c8SLawrence Tang additional_properties_allowed = 325*e407b4c8SLawrence Tang json_object_get_boolean(additional_properties); 3268a2d737cSLawrence Tang 3278a2d737cSLawrence Tang //Run through the "properties" object and validate each of those in turn. 3288a2d737cSLawrence Tang json_object *properties = json_object_object_get(schema, "properties"); 329*e407b4c8SLawrence Tang if (properties != NULL && 330*e407b4c8SLawrence Tang json_object_get_type(properties) == json_type_object) { 331*e407b4c8SLawrence Tang json_object_object_foreach(properties, key, value) 3328a2d737cSLawrence Tang { 3338a2d737cSLawrence Tang //If the given property name does not exist on the target object, ignore and continue next. 334*e407b4c8SLawrence Tang json_object *object_prop = 335*e407b4c8SLawrence Tang json_object_object_get(object, key); 3368a2d737cSLawrence Tang if (object_prop == NULL) 3378a2d737cSLawrence Tang continue; 3388a2d737cSLawrence Tang 3398a2d737cSLawrence Tang //Validate against the schema. 340*e407b4c8SLawrence Tang if (!validate_field(key, value, object_prop, 341*e407b4c8SLawrence Tang error_message)) 3428a2d737cSLawrence Tang return 0; 3438a2d737cSLawrence Tang } 344c4814594SLawrence Tang 345c4814594SLawrence Tang //If additional properties are banned, validate that no additional properties exist. 346*e407b4c8SLawrence Tang if (!additional_properties_allowed) { 347*e407b4c8SLawrence Tang json_object_object_foreach(object, key, value) 348c4814594SLawrence Tang { 349c4814594SLawrence Tang //If the given property name does not exist on the schema object, fail validation. 350*e407b4c8SLawrence Tang json_object *schema_prop = 351*e407b4c8SLawrence Tang json_object_object_get(properties, key); 352*e407b4c8SLawrence Tang if (schema_prop == NULL) { 353*e407b4c8SLawrence Tang log_validator_error( 354*e407b4c8SLawrence Tang error_message, 355*e407b4c8SLawrence Tang "Invalid additional property '%s' detected on field '%s'.", 356*e407b4c8SLawrence Tang key, field_name); 357c4814594SLawrence Tang return 0; 358c4814594SLawrence Tang } 359c4814594SLawrence Tang } 360c4814594SLawrence Tang } 3618a2d737cSLawrence Tang } 3628a2d737cSLawrence Tang 3638a2d737cSLawrence Tang return 1; 3648a2d737cSLawrence Tang } 3658a2d737cSLawrence Tang 3668a2d737cSLawrence Tang //Validates a single array value according to the given specification. 367*e407b4c8SLawrence Tang int validate_array(const char *field_name, json_object *schema, 368*e407b4c8SLawrence Tang json_object *object, char *error_message) 3698a2d737cSLawrence Tang { 37045e04b0aSLawrence Tang //Iterate all items in the array, and validate according to the "items" schema. 37145e04b0aSLawrence Tang json_object *items_schema = json_object_object_get(schema, "items"); 372*e407b4c8SLawrence Tang if (items_schema != NULL && 373*e407b4c8SLawrence Tang json_object_get_type(items_schema) == json_type_object) { 37445e04b0aSLawrence Tang int array_len = json_object_array_length(object); 375*e407b4c8SLawrence Tang for (int i = 0; i < array_len; i++) { 376*e407b4c8SLawrence Tang if (!validate_field(field_name, items_schema, 377*e407b4c8SLawrence Tang json_object_array_get_idx(object, 378*e407b4c8SLawrence Tang i), 379*e407b4c8SLawrence Tang error_message)) 38045e04b0aSLawrence Tang return 0; 38145e04b0aSLawrence Tang } 38245e04b0aSLawrence Tang } 38345e04b0aSLawrence Tang 3848a2d737cSLawrence Tang return 1; 3858a2d737cSLawrence Tang } 3868f793ac3SLawrence Tang 3878f793ac3SLawrence Tang //Enables/disables debugging globally for the JSON validator. 388*e407b4c8SLawrence Tang void validate_schema_debug_enable() 389*e407b4c8SLawrence Tang { 390*e407b4c8SLawrence Tang json_validator_debug = 1; 391*e407b4c8SLawrence Tang } 392*e407b4c8SLawrence Tang void validate_schema_debug_disable() 393*e407b4c8SLawrence Tang { 394*e407b4c8SLawrence Tang json_validator_debug = 0; 395*e407b4c8SLawrence Tang } 3968f793ac3SLawrence Tang 3977cd13908SLawrence Tang //Logs an error message to the given error message location and (optionally) provides debug output. 3988f793ac3SLawrence Tang void log_validator_error(char *error_message, const char *format, ...) 3998f793ac3SLawrence Tang { 4008f793ac3SLawrence Tang va_list args; 4018f793ac3SLawrence Tang 4028f793ac3SLawrence Tang //Log error to error out. 4038f793ac3SLawrence Tang va_start(args, format); 4048f793ac3SLawrence Tang vsnprintf(error_message, JSON_ERROR_MSG_MAX_LEN, format, args); 4058f793ac3SLawrence Tang va_end(args); 4068f793ac3SLawrence Tang 4078f793ac3SLawrence Tang //Debug message if necessary. 4088f793ac3SLawrence Tang va_start(args, format); 4098f793ac3SLawrence Tang log_validator_msg(format, args); 4108f793ac3SLawrence Tang va_end(args); 4118f793ac3SLawrence Tang } 4128f793ac3SLawrence Tang 4137cd13908SLawrence Tang //Logs a debug message to stdout, if validator debug is enabled. 4148f793ac3SLawrence Tang void log_validator_debug(const char *format, ...) 4158f793ac3SLawrence Tang { 4168f793ac3SLawrence Tang va_list args; 4178f793ac3SLawrence Tang va_start(args, format); 4188f793ac3SLawrence Tang log_validator_msg(format, args); 4198f793ac3SLawrence Tang va_end(args); 4208f793ac3SLawrence Tang } 4218f793ac3SLawrence Tang 4228f793ac3SLawrence Tang //Logs a single validator debug/error message. 4238f793ac3SLawrence Tang void log_validator_msg(const char *format, va_list args) 4248f793ac3SLawrence Tang { 4258f793ac3SLawrence Tang //Print debug output if debug is on. 426*e407b4c8SLawrence Tang if (json_validator_debug) { 4278f793ac3SLawrence Tang //Make new format string for error. 4288f793ac3SLawrence Tang const char *header = "json_validator: "; 4298f793ac3SLawrence Tang char *new_format = malloc(strlen(header) + strlen(format) + 2); 4308f793ac3SLawrence Tang strcpy(new_format, header); 4318f793ac3SLawrence Tang strcat(new_format, format); 4328f793ac3SLawrence Tang strcat(new_format, "\n"); 4338f793ac3SLawrence Tang 4348f793ac3SLawrence Tang //Print & free format. 4358f793ac3SLawrence Tang vfprintf(stdout, new_format, args); 4368f793ac3SLawrence Tang free(new_format); 4378f793ac3SLawrence Tang } 4388f793ac3SLawrence Tang }