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Krzysztof Gabis 2012-10-16 19:56:54 +02:00
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.DS_Store

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#parson
##About
Parson is a small json parser and reader written in C.
##Features
* Small (only 2 files)
* Simple API
* Addressing json values with dot notation (similiar to C structs or objects in most OO languages, e.g. "objectA.objectB.value")
* C89 compatible
* Test suites
##Installation
Run the following code:
```
git clone http://github.com/kgabis/parson.git
```
and copy parson.h and parson.c to you source code tree.
##Example
Here is a function, which prints basic commit info (date, sha and author) from a github repository. It's also included in tests.c file, you can just uncomment and run it.
```c
void print_commit_info(const char *username, const char * repo) {
JSON_Value *root_value;
JSON_Array *commits;
JSON_Object *commit;
int i;
char curl_command[512];
char cleanup_command[256];
char *output_filename = "commits.json";
/* it ain't pretty, but it's not a libcurl tutorial */
sprintf(curl_command, "curl \"https://api.github.com/repos/%s/%s/commits\"\
> %s 2> /dev/null", username, repo, output_filename);
sprintf(cleanup_command, "rm -f %s", output_filename);
system(curl_command);
/* parsing json and validating output */
root_value = json_parse_file(output_filename);
if (root_value == NULL || json_value_get_type(root_value) != JSONArray) {
system(cleanup_command);
return;
}
/* getting array from root value and printing commit info */
commits = json_value_get_array(root_value);
printf("%-10.10s %-10.10s %s\n", "Date", "SHA", "Author");
for (i = 0; i < json_array_get_count(commits); i++) {
commit = json_array_get_object(commits, i);
printf("%.10s %.10s %s\n",
json_object_dotget_string(commit, "commit.author.date"),
json_object_get_string(commit, "sha"),
json_object_dotget_string(commit, "commit.author.name"));
}
/* cleanup code */
json_value_free(root_value);
system(cleanup_command);
}
```
Calling ```print_commit_info("torvalds", "linux");``` prints:
```
Date SHA Author
2012-10-15 dd8e8c4a2c David Rientjes
2012-10-15 3ce9e53e78 Michal Marek
2012-10-14 29bb4cc5e0 Randy Dunlap
2012-10-15 325adeb55e Ralf Baechle
2012-10-14 68687c842c Russell King
2012-10-14 ddffeb8c4d Linus Torvalds
...
```
##License
[The MIT License (MIT)](http://opensource.org/licenses/mit-license.php)

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/*
Copyright (c) 2012 Krzysztof Gabis
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "parson.h"
#define STARTING_CAPACITY 10
#define sizeof_token(a) (sizeof(a) - 1)
/* Type definitions */
union json_value_value {
const char * string;
double number;
JSON_Object *object;
JSON_Array *array;
int bool;
int null;
};
struct json_value_t {
enum json_value_type type;
union json_value_value value;
};
struct json_object_t {
const char **names;
JSON_Value **values;
size_t count;
size_t capacity;
};
struct json_array_t {
JSON_Value **items;
size_t count;
size_t capacity;
};
/* JSON Object */
static JSON_Object * json_object_init();
static int json_object_add(JSON_Object *object, const char *name, JSON_Value *value);
static void json_object_free(JSON_Object *object);
/* JSON Array */
static JSON_Array * json_array_init();
static void json_array_add(JSON_Array *array, JSON_Value *value);
static void json_array_free(JSON_Array *array);
/* JSON Value */
static JSON_Value * json_value_init_object();
static JSON_Value * json_value_init_array();
static JSON_Value * json_value_init_string(const char *string);
static JSON_Value * json_value_init_number(double number);
static JSON_Value * json_value_init_bool(int bool);
static JSON_Value * json_value_init_null();
/* Parser */
static const char * skip_string(const char *string);
static char * copy_and_remove_whitespaces(const char *string);
static int is_utf_string(const char *string);
static const char * parse_escaped_characters(const char *string);
static const char * get_string(const char **string);
static JSON_Value * parse_object_value(const char **string);
static JSON_Value * parse_array_value(const char **string);
static JSON_Value * parse_string_value(const char **string);
static JSON_Value * parse_bool_value(const char **string);
static JSON_Value * parse_number_value(const char **string);
static JSON_Value * parse_null_value(const char **string);
static JSON_Value * parse_value(const char **string);
/* JSON Object */
static JSON_Object * json_object_init() {
JSON_Object *new_object = (JSON_Object*)malloc(sizeof(JSON_Object));
new_object->names = (const char**)malloc(sizeof(const char*) * STARTING_CAPACITY);
new_object->values = (JSON_Value**)malloc(sizeof(JSON_Value*) * STARTING_CAPACITY);
new_object->capacity = STARTING_CAPACITY;
new_object->count = 0;
return new_object;
}
static int json_object_add(JSON_Object *object, const char *name, JSON_Value *value) {
size_t index;
if (object->count >= object->capacity) {
size_t new_capacity = object->capacity * 2;
object->names = realloc(object->names, new_capacity * sizeof(const char*));
object->values = realloc(object->values, new_capacity * sizeof(JSON_Value*));
object->capacity = new_capacity;
}
if (json_object_get_value(object, name) != NULL) { return 0; }
index = object->count;
object->names[index] = strdup(name);
object->values[index] = value;
object->count++;
return 1;
}
static void json_object_free(JSON_Object *object) {
int i;
for (i = 0; i < object->count; i++) {
free((void*)object->names[i]);
json_value_free(object->values[i]);
}
free(object->names);
free(object->values);
free(object);
}
/* JSON Array */
static JSON_Array * json_array_init() {
JSON_Array *new_array = (JSON_Array*)malloc(sizeof(JSON_Array));
new_array->items = (JSON_Value**)malloc(STARTING_CAPACITY * sizeof(JSON_Value*));
new_array->capacity = STARTING_CAPACITY;
new_array->count = 0;
return new_array;
}
static void json_array_add(JSON_Array *array, JSON_Value *value) {
if (array->count >= array->capacity) {
size_t new_capacity = array->capacity * 2;
array->items = realloc(array->items, new_capacity * sizeof(JSON_Value*));
array->capacity = new_capacity;
}
array->items[array->count] = value;
array->count++;
}
static void json_array_free(JSON_Array *array) {
int i;
for (i = 0; i < array->count; i++) {
json_value_free(array->items[i]);
}
free(array->items);
free(array);
}
/* JSON Value */
static JSON_Value * json_value_init_object() {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONObject;
new_value->value.object = json_object_init();
return new_value;
}
static JSON_Value * json_value_init_array() {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONArray;
new_value->value.array = json_array_init();
return new_value;
}
static JSON_Value * json_value_init_string(const char *string) {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONString;
new_value->value.string = string;
return new_value;
}
static JSON_Value * json_value_init_number(double number) {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONNumber;
new_value->value.number = number;
return new_value;
}
static JSON_Value * json_value_init_bool(int bool) {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONBool;
new_value->value.bool = bool;
return new_value;
}
static JSON_Value * json_value_init_null() {
JSON_Value *new_value = (JSON_Value*)malloc(sizeof(JSON_Value));
new_value->type = JSONNull;
return new_value;
}
/* Parser */
static const char * skip_string(const char *string) {
string++;
while (*string != '\0' && *string != '\"') {
if (*string == '\\') { string++; if (*string == '\0') { break; } }
string++;
}
if (*string == '\0') { return NULL; }
return string + 1;
}
static char *copy_and_remove_whitespaces(const char *string) {
char *output_string = (char*)malloc(strlen(string) + 1);
char *output_string_ptr = output_string;
const char *string_ptr = string;
const char *skipped_string = NULL;
char current_char;
while (*string_ptr) {
current_char = *string_ptr;
switch (current_char) {
case ' ': case '\r': case '\n': case '\t':
string_ptr++;
break;
case '\"':
skipped_string = skip_string(string_ptr);
if (skipped_string == NULL) { free(output_string); return NULL; }
strncpy(output_string_ptr, string_ptr, skipped_string - string_ptr);
output_string_ptr = output_string_ptr + (skipped_string - string_ptr);
string_ptr = skipped_string;
break;
default:
*output_string_ptr = current_char;
string_ptr++;
output_string_ptr++;
break;
}
}
*output_string_ptr = '\0';
output_string = realloc(output_string, strlen(output_string) + 1);
return output_string;
}
static int is_utf_string(const char *string) {
int i;
if (strlen(string) < 4) { return 0; }
for (i = 0; i < 4; i++) { if (!isxdigit(string[i])) { return 0; } }
return 1;
}
static const char * parse_escaped_characters(const char *string) {
char *output_string = (char*)malloc(strlen(string) + 1);
char *output_string_ptr = output_string;
const char *string_ptr = string;
char current_char;
unsigned int utf_val;
while (*string_ptr) {
current_char = *string_ptr;
if (current_char == '\\') {
string_ptr++;
current_char = *string_ptr;
switch (current_char) {
case '\"': case '\\': case '/': break;
case 'b': current_char = '\b'; break;
case 'f': current_char = '\f'; break;
case 'n': current_char = '\n'; break;
case 'r': current_char = '\r'; break;
case 't': current_char = '\t'; break;
case 'u':
string_ptr++;
if (!is_utf_string(string_ptr) ||
sscanf(string_ptr, "%4x", &utf_val) == EOF) {
free(output_string); return NULL;
}
if (utf_val < 0x80) {
current_char = utf_val;
} else if (utf_val < 0x800) {
*output_string_ptr++ = (utf_val >> 6) | 0xC0;
current_char = ((utf_val | 0x80) & 0xBF);
} else {
*output_string_ptr++ = (utf_val >> 12) | 0xE0;
*output_string_ptr++ = (((utf_val >> 6) | 0x80) & 0xBF);
current_char = ((utf_val | 0x80) & 0xBF);
}
string_ptr += 3;
break;
default:
free(output_string);
return NULL;
break;
}
} else if (iscntrl(current_char)) { /* no control characters allowed */
free(output_string);
return NULL;
}
*output_string_ptr = current_char;
output_string_ptr++;
string_ptr++;
}
*output_string_ptr = '\0';
output_string = realloc(output_string, strlen(output_string) + 1);
return output_string;
}
/* Returns contents of a string inside double quotes and parses escaped
characters inside.
Example: "\u006Corem ipsum" -> lorem ipsum */
static const char * get_string(const char **string) {
char *quote_contents;
const char *parsed_string;
const char *after_closing_quote_ptr = skip_string(*string);
if (after_closing_quote_ptr == NULL) { return NULL; }
quote_contents = strndup(*string + 1, after_closing_quote_ptr - *string - 2);
*string = after_closing_quote_ptr;
parsed_string = parse_escaped_characters(quote_contents);
free(quote_contents);
return (const char*)parsed_string;
}
static JSON_Value * parse_value(const char **string) {
JSON_Value *output_value = NULL;
if (*string == NULL) { return NULL; }
switch ((*string)[0]) {
case '{':
output_value = parse_object_value(string);
break;
case '[':
output_value = parse_array_value(string);
break;
case '\"':
output_value = parse_string_value(string);
break;
case 'f':
case 't':
output_value = parse_bool_value(string);
break;
case '-':
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
output_value = parse_number_value(string);
break;
case 'n':
output_value = parse_null_value(string);
break;
default:
return NULL;
}
return output_value;
}
static JSON_Value * parse_object_value(const char **string) {
JSON_Value *output_value = json_value_init_object();
const char *new_key = NULL;
JSON_Value *new_value = NULL;
(*string)++;
if (**string == '}') { (*string)++; return output_value; } /* empty object */
while (**string != '\0') {
new_key = get_string(string);
if (new_key == NULL || **string != ':') {
json_value_free(output_value);
return NULL;
}
(*string)++;
new_value = parse_value(string);
if (new_value == NULL) {
free((void*)new_key);
json_value_free(output_value);
return NULL;
}
if(!json_object_add(json_value_get_object(output_value), new_key, new_value)) {
free((void*)new_key);
free(new_value);
json_value_free(output_value);
return NULL;
}
free((void*)new_key);
if (**string != ',') { break; }
(*string)++;
}
if (**string != '}') { json_value_free(output_value); return NULL; }
(*string)++;
return output_value;
}
static JSON_Value * parse_array_value(const char **string) {
JSON_Value *output_value = json_value_init_array();
JSON_Value *new_array_value = NULL;
(*string)++;
if (**string == ']') { /* empty array */
(*string)++;
return output_value;
}
while (**string != '\0') {
new_array_value = parse_value(string);
if (new_array_value == NULL) {
json_value_free(output_value);
return NULL;
}
json_array_add(json_value_get_array(output_value), new_array_value);
if (**string != ',') { break; }
(*string)++;
}
if (**string != ']') {
json_value_free(output_value);
return NULL;
}
(*string)++;
return output_value;
}
static JSON_Value * parse_string_value(const char **string) {
const char *new_string = get_string(string);
if (new_string == NULL) { return NULL; }
return json_value_init_string(new_string);
}
static JSON_Value * parse_bool_value(const char **string) {
size_t true_token_size = sizeof_token("true");
size_t false_token_size = sizeof_token("false");
if (strncmp("true", *string, true_token_size) == 0) {
*string += true_token_size;
return json_value_init_bool(1);
} else if (strncmp("false", *string, false_token_size) == 0) {
*string += false_token_size;
return json_value_init_bool(0);
}
return NULL;
}
static JSON_Value * parse_number_value(const char **string) {
return json_value_init_number(strtod(*string, (char**)string));
}
static JSON_Value * parse_null_value(const char **string) {
size_t token_size = sizeof_token("null");
if (strncmp("null", *string, token_size) == 0) {
*string += token_size;
return json_value_init_null();
}
return NULL;
}
/* Parser API */
JSON_Value * json_parse_file(const char *filename) {
FILE *fp = fopen(filename, "r");
size_t file_size;
char *file_contents;
JSON_Value *output_value;
if (fp == NULL) { return NULL; }
fseek(fp, 0L, SEEK_END);
file_size = ftell(fp);
rewind(fp);
file_contents = (char*)malloc(sizeof(char) * (file_size + 1));
fread(file_contents, file_size, 1, fp);
fclose(fp);
file_contents[file_size] = '\0';
output_value = json_parse_string(file_contents);
free(file_contents);
return output_value;
}
JSON_Value * json_parse_string(const char *string) {
JSON_Value *output_value = NULL;
const char *json_string = string ? copy_and_remove_whitespaces(string) : NULL;
const char *json_string_ptr = json_string;
if (json_string == NULL) { return NULL; }
if (*json_string == '{' || *json_string == '[') {
output_value = parse_value((const char**)&json_string_ptr);
}
free((void*)json_string);
return output_value;
}
/* JSON Object API */
JSON_Value * json_object_get_value(const JSON_Object *object, const char *name) {
int i;
if (object == NULL) { return NULL; }
for (i = 0; i < object->count; i++) {
if (strcmp(object->names[i], name) == 0) { return object->values[i]; }
}
return NULL;
}
const char * json_object_get_string(const JSON_Object *object, const char *name) {
return json_value_get_string(json_object_get_value(object, name));
}
double json_object_get_number(const JSON_Object *object, const char *name) {
return json_value_get_number(json_object_get_value(object, name));
}
JSON_Object * json_object_get_object(const JSON_Object *object, const char *name) {
return json_value_get_object(json_object_get_value(object, name));
}
JSON_Array * json_object_get_array(const JSON_Object *object, const char *name) {
return json_value_get_array(json_object_get_value(object, name));
}
int json_object_get_bool(const JSON_Object *object, const char *name) {
return json_value_get_bool(json_object_get_value(object, name));
}
JSON_Value * json_object_dotget_value(const JSON_Object *object, const char *name) {
const char *object_name, *dot_position = strchr(name, '.');
JSON_Value *output_value;
if (dot_position == NULL) { return json_object_get_value(object, name); }
object_name = strndup(name, dot_position - name);
output_value = json_object_dotget_value(json_object_get_object(object, object_name),
dot_position + 1);
free((void*)object_name);
return output_value;
}
const char * json_object_dotget_string(const JSON_Object *object, const char *name) {
return json_value_get_string(json_object_dotget_value(object, name));
}
double json_object_dotget_number(const JSON_Object *object, const char *name) {
return json_value_get_number(json_object_dotget_value(object, name));
}
JSON_Object * json_object_dotget_object(const JSON_Object *object, const char *name) {
return json_value_get_object(json_object_dotget_value(object, name));
}
JSON_Array * json_object_dotget_array(const JSON_Object *object, const char *name) {
return json_value_get_array(json_object_dotget_value(object, name));
}
int json_object_dotget_bool(const JSON_Object *object, const char *name) {
return json_value_get_bool(json_object_dotget_value(object, name));
}
/* JSON Array API */
JSON_Value * json_array_get_value(const JSON_Array *array, size_t index) {
if (index >= json_array_get_count(array)) { return NULL; }
return array->items[index];
}
const char * json_array_get_string(const JSON_Array *array, size_t index) {
return json_value_get_string(json_array_get_value(array, index));
}
double json_array_get_number(const JSON_Array *array, size_t index) {
return json_value_get_number(json_array_get_value(array, index));
}
JSON_Object * json_array_get_object(const JSON_Array *array, size_t index) {
return json_value_get_object(json_array_get_value(array, index));
}
JSON_Array * json_array_get_array(const JSON_Array *array, size_t index) {
return json_value_get_array(json_array_get_value(array, index));
}
int json_array_get_bool(const JSON_Array *array, size_t index) {
return json_value_get_bool(json_array_get_value(array, index));
}
size_t json_array_get_count(const JSON_Array *array) {
return array != NULL ? array->count : 0;
}
/* JSON Value API */
enum json_value_type json_value_get_type(const JSON_Value *value) {
return value != NULL ? value->type : 0;
}
JSON_Object * json_value_get_object(const JSON_Value *value) {
if (value == NULL || value->type != JSONObject) { return NULL; }
return value->value.object;
}
JSON_Array * json_value_get_array(const JSON_Value *value) {
if (value == NULL || value->type != JSONArray) { return NULL; }
return value->value.array;
}
const char * json_value_get_string(const JSON_Value *value) {
if (value == NULL || value->type != JSONString) { return NULL; }
return value->value.string;
}
double json_value_get_number(const JSON_Value *value) {
if (value == NULL || value->type != JSONNumber) { return 0; }
return value->value.number;
}
int json_value_get_bool(const JSON_Value *value) {
if (value == NULL || value->type != JSONBool) { return -1; }
return value->value.bool;
}
void json_value_free(JSON_Value *value) {
switch (value->type) {
case JSONObject:
json_object_free(value->value.object);
break;
case JSONString:
if (value->value.string != NULL) { free((void*)value->value.string); }
break;
case JSONArray:
json_array_free(value->value.array);
break;
default:
break;
}
free(value);
}

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/*
Copyright (c) 2012 Krzysztof Gabis
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef parson_parson_h
#define parson_parson_h
#ifdef __cplusplus
extern "C"
{
#endif
/* Data structures, enums and typedefs */
struct json_object_t;
typedef struct json_object_t JSON_Object;
struct json_array_t;
typedef struct json_array_t JSON_Array;
struct json_value_t;
typedef struct json_value_t JSON_Value;
enum json_value_type {
JSONNull = 1,
JSONString = 2,
JSONNumber = 3,
JSONObject = 4,
JSONArray = 5,
JSONBool = 6
};
/* Parses first JSON value in a file, returns NULL in case of error */
JSON_Value * json_parse_file(const char *filename);
/* Parses first JSON value in a string, returns NULL in case of error */
JSON_Value * json_parse_string(const char *string);
/* JSON Object */
JSON_Value * json_object_get_value(const JSON_Object *object, const char *name);
const char * json_object_get_string(const JSON_Object *object, const char *name);
double json_object_get_number(const JSON_Object *object, const char *name);
JSON_Object * json_object_get_object(const JSON_Object *object, const char *name);
JSON_Array * json_object_get_array(const JSON_Object *object, const char *name);
int json_object_get_bool(const JSON_Object *object, const char *name);
/* dotget functions enable addressing values with dot notation in nested objects,
just like in structs or c++/java/c# objects (e.g. objectA.objectB.value).
Because valid names in JSON can contain dots, some values may be inaccessible
this way. */
JSON_Value * json_object_dotget_value(const JSON_Object *object, const char *name);
const char * json_object_dotget_string(const JSON_Object *object, const char *name);
double json_object_dotget_number(const JSON_Object *object, const char *name);
JSON_Object * json_object_dotget_object(const JSON_Object *object, const char *name);
JSON_Array * json_object_dotget_array(const JSON_Object *object, const char *name);
int json_object_dotget_bool(const JSON_Object *object, const char *name);
/* JSON Array */
JSON_Value * json_array_get_value(const JSON_Array *array, size_t index);
const char * json_array_get_string(const JSON_Array *array, size_t index);
double json_array_get_number(const JSON_Array *array, size_t index);
JSON_Object * json_array_get_object(const JSON_Array *array, size_t index);
JSON_Array * json_array_get_array(const JSON_Array *array, size_t index);
int json_array_get_bool(const JSON_Array *array, size_t index);
size_t json_array_get_count(const JSON_Array *array);
/* JSON Value */
enum json_value_type json_value_get_type(const JSON_Value *value);
JSON_Object * json_value_get_object(const JSON_Value *value);
JSON_Array * json_value_get_array(const JSON_Value *value);
const char * json_value_get_string(const JSON_Value *value);
double json_value_get_number(const JSON_Value *value);
int json_value_get_bool(const JSON_Value *value);
void json_value_free(JSON_Value *value);
#ifdef __cplusplus
}
#endif
#endif

209
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/*
Copyright (c) 2012 Krzysztof Gabis
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "parson.h"
#define TEST(A) printf("%-72s-",#A); \
if(A){puts(" OK");tests_passed++;} \
else{puts(" FAIL");tests_failed++;}
#define STREQ(A, B) (strcmp(A, B) == 0)
void test_suite_1();
void test_suite_2();
void test_suite_3();
void print_commit_info(const char *username, const char * repo);
static int tests_passed;
static int tests_failed;
int main(int argc, const char * argv[]) {
/* Example function from readme file: */
/* print_commit_info("torvalds", "linux"); */
test_suite_1();
test_suite_2();
test_suite_3();
printf("Tests failed: %d\n", tests_failed);
printf("Tests passed: %d\n", tests_passed);
return 0;
}
/* 3 test files from json.org */
void test_suite_1() {
int i;
JSON_Value *root_value;
char filename[128];
for (i = 1; i <= 3; i++) {
filename[0] = '\0';
sprintf(filename, "tests/test_1_%d.txt", i);
printf("Testing %s:\n", filename);
root_value = json_parse_file(filename);
TEST(root_value != NULL);
if (root_value != NULL) { json_value_free(root_value); }
}
}
/* Testing correctness of parsed values */
void test_suite_2() {
JSON_Value *root_value;
JSON_Object *object;
JSON_Array *array;
int i;
const char *filename = "tests/test_2.txt";
root_value = json_parse_file(filename);
if(root_value == NULL) {
tests_failed++;
return;
}
if (json_value_get_type(root_value) != JSONObject) {
printf("Root is not a JSON object.\n");
tests_failed++;
json_value_free(root_value);
return;
}
object = json_value_get_object(root_value);
printf("Testing %s:\n", filename);
TEST(STREQ(json_object_get_string(object, "string"), "lorem ipsum"));
TEST(STREQ(json_object_get_string(object, "utf string"), "lorem ipsum"));
TEST(json_object_get_number(object, "positive one") == 1.0);
TEST(json_object_get_number(object, "negative one") == -1.0);
TEST(json_object_get_number(object, "hard to parse number") == -0.000314);
TEST(json_object_get_bool(object, "bool true"));
TEST(!json_object_get_bool(object, "bool false"));
TEST(json_value_get_type(json_object_get_value(object, "null")) == JSONNull);
array = json_object_get_array(object, "string array");
if (array != NULL && json_array_get_count(array) > 1) {
TEST(STREQ(json_array_get_string(array, 0), "lorem"));
TEST(STREQ(json_array_get_string(array, 1), "ipsum"));
} else {
tests_failed++;
}
array = json_object_get_array(object, "x^2 array");
if (array != NULL) {
for (i = 0; i < json_array_get_count(array); i++) {
TEST(json_array_get_number(array, i) == (i * i));
}
} else {
tests_failed++;
}
TEST(json_object_get_array(object, "non existent array") == NULL);
TEST(STREQ(json_object_dotget_string(object, "object.nested string"), "str"));
TEST(json_object_dotget_bool(object, "object.nested true"));
TEST(!json_object_dotget_bool(object, "object.nested false"));
TEST(json_object_dotget_value(object, "object.nested null") != NULL);
TEST(json_object_dotget_number(object, "object.nested number") == 123);
TEST(json_object_dotget_value(object, "should.be.null") == NULL);
TEST(json_object_dotget_value(object, "should.be.null.") == NULL);
TEST(json_object_dotget_value(object, ".") == NULL);
TEST(json_object_dotget_value(object, "") == NULL);
array = json_object_dotget_array(object, "object.nested array");
if (array != NULL && json_array_get_count(array) > 1) {
TEST(STREQ(json_array_get_string(array, 0), "lorem"));
TEST(STREQ(json_array_get_string(array, 1), "ipsum"));
} else {
tests_failed++;
}
TEST(json_object_dotget_bool(object, "nested true"));
json_value_free(root_value);
}
/* Testing values, on which parsing should fail */
void test_suite_3() {
TEST(json_parse_string(NULL) == NULL);
TEST(json_parse_string("") == NULL); /* empty string */
TEST(json_parse_string("[\"lorem\",]") == NULL);
TEST(json_parse_string("[,]") == NULL);
TEST(json_parse_string("[,") == NULL);
TEST(json_parse_string("[") == NULL);
TEST(json_parse_string("]") == NULL);
TEST(json_parse_string("{\"a\":0,\"a\":0}") == NULL); /* duplicate keys */
TEST(json_parse_string("{:,}") == NULL);
TEST(json_parse_string("{,}") == NULL);
TEST(json_parse_string("{,") == NULL);
TEST(json_parse_string("{:") == NULL);
TEST(json_parse_string("{") == NULL);
TEST(json_parse_string("}") == NULL);
TEST(json_parse_string("x") == NULL);
TEST(json_parse_string("\"string\"") == NULL);
TEST(json_parse_string("{:\"no name\"}") == NULL);
TEST(json_parse_string("[,\"no first value\"]") == NULL);
TEST(json_parse_string("[\"\\u00zz\"]") == NULL); /* invalid utf value */
TEST(json_parse_string("[\"\\\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\"\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\0\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\a\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\b\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\t\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\n\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\f\"]") == NULL); /* control character */
TEST(json_parse_string("[\"\r\"]") == NULL); /* control character */
}
void print_commit_info(const char *username, const char * repo) {
JSON_Value *root_value;
JSON_Array *commits;
JSON_Object *commit;
int i;
char curl_command[512];
char cleanup_command[256];
char *output_filename = "commits.json";
/* it ain't pretty, but it's not a libcurl tutorial */
sprintf(curl_command, "curl \"https://api.github.com/repos/%s/%s/commits\"\
> %s 2> /dev/null", username, repo, output_filename);
sprintf(cleanup_command, "rm -f %s", output_filename);
system(curl_command);
/* parsing json and validating output */
root_value = json_parse_file(output_filename);
if (root_value == NULL || json_value_get_type(root_value) != JSONArray) {
system(cleanup_command);
return;
}
/* getting array from root value and printing commit info */
commits = json_value_get_array(root_value);
printf("%-10.10s %-10.10s %s\n", "Date", "SHA", "Author");
for (i = 0; i < json_array_get_count(commits); i++) {
commit = json_array_get_object(commits, i);
printf("%.10s %.10s %s\n",
json_object_dotget_string(commit, "commit.author.date"),
json_object_get_string(commit, "sha"),
json_object_dotget_string(commit, "commit.author.name"));
}
/* cleanup code */
json_value_free(root_value);
system(cleanup_command);
}

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#!/bin/bash
gcc tests.c parson.c -Wall -pedantic-errors -std=c89 -o test
./test
rm -f *.o
rm test

58
tests/test_1_1.txt Normal file
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[
"JSON Test Pattern pass1",
{"object with 1 member":["array with 1 element"]},
{},
[],
-42,
true,
false,
null,
{
"integer": 1234567890,
"real": -9876.543210,
"e": 0.123456789e-12,
"E": 1.234567890E+34,
"": 23456789012E66,
"zero": 0,
"one": 1,
"space": " ",
"quote": "\"",
"backslash": "\\",
"controls": "\b\f\n\r\t",
"slash": "/ & \/",
"alpha": "abcdefghijklmnopqrstuvwyz",
"ALPHA": "ABCDEFGHIJKLMNOPQRSTUVWYZ",
"digit": "0123456789",
"0123456789": "digit",
"special": "`1~!@#$%^&*()_+-={':[,]}|;.</>?",
"hex": "\u0123\u4567\u89AB\uCDEF\uabcd\uef4A",
"true": true,
"false": false,
"null": null,
"array":[ ],
"object":{ },
"address": "50 St. James Street",
"url": "http://www.JSON.org/",
"comment": "// /* <!-- --",
"# -- --> */": " ",
" s p a c e d " :[1,2 , 3
,
4 , 5 , 6 ,7 ],"compact":[1,2,3,4,5,6,7],
"jsontext": "{\"object with 1 member\":[\"array with 1 element\"]}",
"quotes": "&#34; \u0022 %22 0x22 034 &#x22;",
"\/\\\"\uCAFE\uBABE\uAB98\uFCDE\ubcda\uef4A\b\f\n\r\t`1~!@#$%^&*()_+-=[]{}|;:',./<>?"
: "A key can be any string"
},
0.5 ,98.6
,
99.44
,
1066,
1e1,
0.1e1,
1e-1,
1e00,2e+00,2e-00
,"rosebud"]

1
tests/test_1_2.txt Normal file
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[[[[[[[[[[[[[[[[[[["Not too deep"]]]]]]]]]]]]]]]]]]]

6
tests/test_1_3.txt Normal file
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{
"JSON Test Pattern pass3": {
"The outermost value": "must be an object or array.",
"In this test": "It is an object."
}
}

19
tests/test_2.txt Normal file
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{
"string" : "lorem ipsum",
"utf string" : "\u006corem\u0020ipsum",
"positive one" : 1,
"negative one" : -1,
"pi" : 3.14,
"hard to parse number" : -3.14e-4,
"bool true" : true,
"bool false" : false,
"null" : null,
"string array" : ["lorem", "ipsum"],
"x^2 array" : [0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100],
"object" : { "nested string" : "str",
"nested true" : true,
"nested false" : false,
"nested null" : null,
"nested number" : 123,
"nested array" : ["lorem", "ipsum"] }
}