在哪租用网站,小吃培训,百度竞价排名多少钱,网站建设什么因素最重要文章目录 写在前面头文件源代码使用示例 写在前面
用c语言实现的一个简单json库#xff0c;极其轻量 仅1个四百多行源码的源文件#xff0c;和1个头文件 支持对象、数组、数值、字符串类型 github仓库
头文件
对主要的json API的声明
#ifndef ARCOJSON_ARCOJSON_H
#defin… 文章目录 写在前面头文件源代码使用示例 写在前面
用c语言实现的一个简单json库极其轻量 仅1个四百多行源码的源文件和1个头文件 支持对象、数组、数值、字符串类型 github仓库
头文件
对主要的json API的声明
#ifndef ARCOJSON_ARCOJSON_H
#define ARCOJSON_ARCOJSON_H#define VERSION v0.1
enum json_type{json_type_empty,json_type_object,json_type_array,json_type_string,json_type_long
};typedef struct arco_json{enum json_type type;int child_num;int seq;char* key;void* value;struct arco_json* parent;struct arco_json* next;
}arco_json;/*** function: new_json_object* 功能:创建一个json对象*/
arco_json* new_json_object();/*** function: new_json_array* 功能:创建一个json数组*/
arco_json* new_json_array();/*** function:* 功能:创建一个json, value是字符串*/
arco_json* new_json_string(char* value);/*** function: new_json_long* 功能:创建一个json, value是long类型的字符串* 说明:为了代码简洁, 仅使用long来表示数值*/
arco_json* new_json_long(long value);/*** function: get_json_type* 功能:返回json的类型*/
int get_json_type(arco_json* json);/*** function: json_object_add* 功能:给json对象添加键值对*/
int json_object_add(arco_json* json, char* key, arco_json* j_add);/*** function: json_array_add* 功能:给json数组添加对象*/
int json_array_add(arco_json* json, arco_json* j_add);/*** function: json_to_string* 功能:json对象转json格式字符串*/
char* json_to_string(arco_json* json);/*** function: string_to_json* 功能:json格式字符串转json对象*/
arco_json* string_to_json(char* str);/*** function: get_string_from_object* 功能:通过key获取字符串类型的value*/
char* get_string_from_object(arco_json* json, char* key);/*** function: get_long_from_object* 功能:通过key获取数值类型的value*/
long get_long_from_object(arco_json* json, char* key);/*** function: get_object_from_object* 功能:通过key获取object类型的value*/
arco_json* get_object_from_object(arco_json* json, char* key);/*** function: get_object_from_array* 功能:获取json array的第idx个对象(从0开始*/
arco_json* get_object_from_array(arco_json* json, int idx);#endif //ARCOJSON_ARCOJSON_H源代码
//
// Created by arco on 2023/8/19.
//
#include stdarg.h
#include stdio.h
#include stdlib.h
#include string.h
#include arcojson.hint g_json_char_num 0;
char* g_json_str NULL;int init_new_json(arco_json* json, int json_type)
{json-type json_type;json-child_num 0;json-seq 0;json-key NULL;json-value NULL;json-next NULL;
}arco_json* new_json_object()
{arco_json* json malloc(sizeof(arco_json));init_new_json(json, json_type_object);return json;
}arco_json* new_json_array()
{arco_json* json malloc(sizeof(arco_json));init_new_json(json, json_type_array);return json;
}arco_json* new_json_string(char* value)
{// 分配内存arco_json* json malloc(sizeof(arco_json));init_new_json(json, json_type_string);json-value (char*) malloc(strlen(value) 1);memcpy(json-value, value, strlen(value) 1);return json;
}arco_json* new_json_long(long value)
{// 分配内存arco_json* json malloc(sizeof(arco_json));init_new_json(json, json_type_long);json-value (long*) malloc(sizeof(long));*(long*) json-value value;return json;
}arco_json* new_json_empty()
{// 分配内存arco_json* json malloc(sizeof(arco_json));init_new_json(json, json_type_empty);return json;
}int get_json_type(arco_json* json)
{if (json ! NULL) return json-type;else return -1;
}int json_object_add(arco_json* json, char* key, arco_json* j_add)
{if (json-type ! json_type_object) {printf(json type isnt object, cant add kv\n);return -1;}int i;// if cur json has none valueif (json-value NULL) {json-value j_add;j_add-parent json;j_add-key malloc(strlen(key) 1);memcpy(j_add-key, key, strlen(key) 1);json-child_num;}else {arco_json* arco json-value;for (i 0; i json-child_num - 1; i) {arco arco-next;}j_add-key malloc(strlen(key) 1);memcpy(j_add-key, key, strlen(key) 1);arco-next j_add;j_add-parent arco-parent;json-child_num;}return 0;
}int json_array_add(arco_json* json, arco_json* j_add)
{if (json-type ! json_type_array) {printf(json type isnt array, cant add object\n);return -1;}int i;// if cur json has none valueif (json-value NULL) {json-value j_add;json-child_num;}else {arco_json* arco json-value;for (i 0; i json-child_num - 1; i) {arco arco-next;}arco-next j_add;j_add-parent arco-parent;json-child_num;}return 0;
}typedef void (*deal_callback) (char*, ...);void json_depth_expand(arco_json* json, int depth, deal_callback callback)
{if (get_json_type(json) json_type_array) {if (json-key ! NULL depth 0)callback(\%s\:, json-key);callback([);if (json-value ! NULL)json_depth_expand(json-value, depth 1, callback);}if (get_json_type(json) json_type_object) {if (json-key ! NULL depth 0)callback(\%s\:, json-key);callback({);if (json-value ! NULL)json_depth_expand(json-value, depth 1, callback);}if (json-type json_type_string) {callback(\%s\:, json-key);callback(\%s\, (char*) json-value);if (json-next ! NULL) callback(,);}if (json-type json_type_long) {callback(\%s\:, json-key);callback(%d, *(long*) json-value);if (json-next ! NULL) callback(,);}if (get_json_type(json) json_type_array) {callback(]);if (json-next ! NULL depth 0) callback(,);}if (get_json_type(json) json_type_object) {callback(});if (json-next ! NULL depth 0) callback(,);}// 横向搜索if (json-next ! NULL depth 0) {json_depth_expand(json-next, depth, callback);}
}void calculate_callback(char* fmt, ...)
{va_list args;va_start(args, fmt);char str[64];vsprintf(str, fmt, args);g_json_char_num (int) strlen(str);va_end(args);
}void tostring_callback(char* fmt, ...)
{va_list args;va_start(args, fmt);char str[64];vsprintf(str, fmt, args);strcat(g_json_str, str);va_end(args);
}int calculate_json_str_length(arco_json* json)
{g_json_char_num 0;json_depth_expand(json, 0, calculate_callback);return g_json_char_num;
}char* json_to_string(arco_json* json)
{int size calculate_json_str_length(json);g_json_str malloc(size 1);memset(g_json_str, \0, size 1);json_depth_expand(json, 0, tostring_callback);char* json_str malloc(strlen(g_json_str) 1);memcpy(json_str, g_json_str, strlen(g_json_str) 1);free(g_json_str);g_json_str NULL;return json_str;
}char* str_get_here_to_there(char* str, int position, char c)
{int i, size 1;char* dst NULL;for (i position; i strlen(str); i) {if (str[i] ! c) size;else break;}dst malloc(sizeof(char) * size);for (i position; i strlen(str); i) {if (str[i] ! c) dst[i - position] str[i];else {dst[i - position] \0;return dst;}}return NULL;
}// 返回值是解析的数值的字符串长度(需要跳过的长度
int parse_num_value(char* str, void* value)
{int i, start 0, val_len 0;long rate 1;long* num_val malloc(sizeof(long));char arr[16];memset(arr, \0, sizeof(arr));if (str[0] -) start 1;val_len start;for (i start; i strlen(str) i sizeof(arr) - 1; i) {if (str[i] 0 || str[i] 9) break;arr[i - start] str[i];val_len;}for (i strlen(arr) - 1; i 0; i--) {*num_val (arr[i] - 0) * rate;rate * 10;}if (start) *num_val * -1;*(long*) value *num_val;return val_len;
}arco_json* string_to_json(char* str)
{int i, str_len (int) strlen(str), need_new 0;int yh_flag 0, value_flag 0;arco_json* json new_json_empty();arco_json* p_json json;for (i 0; i str_len; i) {/*** 紧随{或[后的第一个json还没有new出来*/if (need_new) {arco_json* j_tmp new_json_empty();p_json-value j_tmp;j_tmp-parent p_json;p_json p_json-value;need_new 0;}/*** 截取第1-2个引号之间的值作为key, 如果有第3-4个引号那就作为value*/if (str[i] ) {yh_flag;if (yh_flag 1) {p_json-key str_get_here_to_there(str, i 1, );}else if (yh_flag 2) {}else if (yh_flag 3) {p_json-value str_get_here_to_there(str, i 1, );p_json-type json_type_string;}else if (yh_flag 4) {yh_flag 0;}}/*** 处理冒号后紧随的第一个*/if (value_flag) {if ((str[i] 0 str[i] 9) || str[i] -) {p_json-type json_type_long;p_json-value (long*)malloc(sizeof(long));i parse_num_value(str[i], p_json-value);yh_flag 0;}value_flag 0;}if (str[i] :) {value_flag 1;}if (str[i] {) {yh_flag 0;need_new 1;p_json-type json_type_object;}if (str[i] [) {yh_flag 0;need_new 1;p_json-type json_type_array;}if (str[i] ,) {// 创建一个空json, 挂到当前json的nextarco_json* j_tmp new_json_empty();j_tmp-seq p_json-seq 1;p_json-next j_tmp;// 拷贝上级jsonj_tmp-parent p_json-parent;// 如果是第1个确保当前json的上级的value指向正确if (p_json-seq 0) {arco_json* q_json p_json-parent;q_json-value p_json;}// 移动当前jsonp_json p_json-next;}if (str[i] } || str[i] ]) {arco_json* j_tmp p_json-parent;p_json j_tmp;}}return json;
}char* get_string_from_object(arco_json* json, char* key)
{if (json NULL) return NULL;if (json-type ! json_type_object) return NULL;if (json-value NULL) return NULL;arco_json* p_json json-value;while (p_json ! NULL) {if (p_json-type json_type_string) {if (strcmp((char*) p_json-key, key) 0) {size_t length strlen((char*) p_json-value);char* res malloc(sizeof(length 1));memcpy(res, p_json-value, length 1);return res;}}p_json p_json-next;}return NULL;
}long get_long_from_object(arco_json* json, char* key)
{if (json NULL) return -1;if (json-type ! json_type_object) return -1;if (json-value NULL) return -1;arco_json* p_json json-value;while (p_json ! NULL) {if (p_json-type json_type_long) {if (strcmp((char*) p_json-key, key) 0) {long res *(long*) p_json-value;return res;}}p_json p_json-next;}return -1;
}arco_json* get_object_from_object(arco_json* json, char* key)
{if (json NULL) return NULL;if (json-type ! json_type_object) return NULL;if (json-value NULL) return NULL;arco_json* p_json json-value;while (p_json ! NULL) {if (p_json-type json_type_object) {if (strcmp((char*) p_json-key, key) 0) {arco_json* res malloc(sizeof(arco_json));memcpy(res, p_json, sizeof(arco_json));return res;}}p_json p_json-next;}return NULL;
}arco_json* get_object_from_array(arco_json* json, int idx)
{if (json NULL) return NULL;if (json-type ! json_type_array) return NULL;if (json-value NULL) return NULL;int i 0;arco_json* p_json json-value;while (p_json ! NULL) {if (p_json-type json_type_object) {if (i idx) {arco_json* res malloc(sizeof(arco_json));memcpy(res, p_json, sizeof(arco_json));return res;}}p_json p_json-next;i;}return NULL;
}使用示例
请直接看最下面的main函数
//
// Created by arco on 2023/9/3.
//
#include string.h
#include stdio.h
#include arcojson.h/*** test arco json usage*/
void create_json_object_test()
{arco_json* json new_json_object();json_object_add(json, key0, new_json_string(value0));arco_json* json1 new_json_object();json_object_add(json1, key1.0, new_json_string(value1.0));json_object_add(json, key1, json1);arco_json* json2 new_json_object();arco_json* json20 new_json_object();json_object_add(json20, key2.0.1, new_json_string(value2.0.1));json_object_add(json2, key2.0, json20);json_object_add(json, key2, json2);printf(create_json_obj:%s\n, json_to_string(json));
}void create_json_object_test_long()
{arco_json* json new_json_object();json_object_add(json, key0, new_json_long(100));arco_json* json1 new_json_object();json_object_add(json1, key1.0, new_json_long(-1));json_object_add(json, key1, json1);arco_json* json2 new_json_object();arco_json* json20 new_json_object();json_object_add(json20, key2.0.1, new_json_long(-1234567));json_object_add(json20, key2.0.2, new_json_string(value2.0.2));json_object_add(json2, key2.0, json20);json_object_add(json, key2, json2);printf(create_json_obj_num:%s\n, json_to_string(json));
}void create_json_array_test()
{arco_json* json new_json_array();arco_json* json0 new_json_object();json_object_add(json0, key0, new_json_string(value0));arco_json* json1 new_json_object();json_object_add(json1, key1, new_json_string(value1));arco_json* json2 new_json_object();arco_json* json20 new_json_object();json_object_add(json20, key2.0, new_json_string(value2.0));json_object_add(json2, key2, json20);json_array_add(json, json0);json_array_add(json, json1);json_array_add(json, json2);printf(create_json_arr:%s\n, json_to_string(json));
}void create_json_mixed_test()
{arco_json* json new_json_object();arco_json* j_o0 new_json_object();json_object_add(j_o0, ok0, new_json_string(oval0));arco_json* j_a1 new_json_array();arco_json* j_o10 new_json_object();json_object_add(j_o10, ok10, new_json_string(oval10));arco_json* j_o11 new_json_object();json_object_add(j_o11, ok11, new_json_string(oval11));json_object_add(j_o11, ok12, new_json_string(oval12));json_array_add(j_a1, j_o10);json_array_add(j_a1, j_o11);arco_json* j_o2 new_json_object();arco_json* j_o20 new_json_object();json_object_add(j_o20, ok20, new_json_string(oval20));json_object_add(j_o20, ok21, new_json_string(oval21));json_object_add(j_o20, ok22, new_json_string(oval22));json_object_add(j_o2, ok2, j_o20);json_object_add(json, obj_1, j_o0);json_object_add(json, arr_1, j_a1);json_object_add(json, obj_2, j_o2);printf(create_json_mix:%s\n, json_to_string(json));
}void create_json_null_test()
{arco_json* json_o new_json_object();arco_json* json_a new_json_array();printf(create_json_nul:%s %s\n, json_to_string(json_o), json_to_string(json_a));
}void str_to_json_object_test()
{char str[] {\key0\:\value0\,\key1\:{\key1.0\:\value1.0\},\key2\:{\key2.0\:{\key2.0.1\:\value2.0.1\}}};arco_json* json string_to_json(str);printf(str_to_json_obj:%s\n, json_to_string(json));
}void str_to_json_object_test_long()
{char str[] {\key0\:100,\key1\:{\key1.0\:-1},\key2\:{\key2.0\:{\key2.0.1\:-1234567,\key2.0.2\:\value2.0.2\}}};arco_json* json string_to_json(str);printf(str_to_json_obj_num:%s\n, json_to_string(json));
}void str_to_json_array_test()
{char str[] [{\key0\:\value0\},{\key1\:\value1\},{\key2\:{\key2.0\:\value2.0\}}];arco_json* json string_to_json(str);printf(str_to_json_arr:%s\n, json_to_string(json));
}void str_to_json_mixed_test()
{char str[] {\obj_1\:{\ok0\:\oval0\},\arr_1\:[{\ok10\:\oval10\},{\ok11\:\oval11\,\ok12\:\oval12\}],\obj_2\:{\ok2\:{\ok20\:\oval20\,\ok21\:\oval21\,\ok22\:\oval22\}}};arco_json* json string_to_json(str);printf(str_to_json_mix:%s\n, json_to_string(json));
}void str_to_json_null_test()
{char str[] {};arco_json* json string_to_json(str);char str2[] [];arco_json* json2 string_to_json(str2);printf(str_to_json_null:%s %s\n, json_to_string(json), json_to_string(json2));
}void json_depth_expand_print(arco_json* json, int depth)
{
// printf(depth%d\n, depth);if (get_json_type(json) json_type_array) {if (json-key ! NULL depth 0) printf(\%s\:, json-key);printf([);json_depth_expand_print(json-value, depth 1);}if (get_json_type(json) json_type_object) {if (json-key ! NULL depth 0) printf(\%s\:, json-key);printf({);json_depth_expand_print(json-value, depth 1);}if (json-type json_type_string) {printf(\%s\:, json-key);printf(\%s\, (char*) json-value);if (json-next ! NULL) printf(,);}if (json-type json_type_long) {printf(\%s\:, json-key);printf(%d, *(int*) json-value);if (json-next ! NULL) printf(,);}if (json-type json_type_empty) {printf(tmd empty\n);}if (get_json_type(json) json_type_array) {printf(]);if (json-next ! NULL depth 0) printf(,);}if (get_json_type(json) json_type_object) {printf(});if (json-next ! NULL depth 0) printf(,);}// 横向搜索if (json-next ! NULL depth 0) {json_depth_expand_print(json-next, depth);}
}void get_json_value_test()
{arco_json* json new_json_array();arco_json* json0 new_json_object();json_object_add(json0, key00, new_json_long(123));json_object_add(json0, key01, new_json_string(value01));json_object_add(json0, key02, new_json_string(value02));arco_json* json1 new_json_object();arco_json* json10 new_json_object();json_object_add(json10, key10, new_json_string(value10));json_object_add(json10, key11, new_json_long(1234567));json_object_add(json1, key1, json10);json_array_add(json, json0);json_array_add(json, json1);printf(get_json_value_test:%s\n, json_to_string(json));arco_json* get_obj_by_idx get_object_from_array(json, 1);printf(get_obj_by_idx:%s\n, json_to_string(get_obj_by_idx));arco_json* get_obj_by_key get_object_from_object(get_obj_by_idx, key1);printf(get_obj_by_key:%s\n, json_to_string(get_obj_by_key));char* get_str get_string_from_object(get_obj_by_key, key10);printf(get_str_value:%s\n, get_str);long get_long get_long_from_object(get_obj_by_key, key11);printf(get_str_value:%ld\n, get_long);}int main()
{// 创建json对象示例create_json_object_test();str_to_json_object_test();printf(\n);// 创建带数值的json对象示例create_json_object_test_long();str_to_json_object_test_long();printf(\n);// 创建json数组示例create_json_array_test();str_to_json_array_test();printf(\n);// 对象和数组混合示例create_json_mixed_test();str_to_json_mixed_test();printf(\n);// null情况示例create_json_null_test();str_to_json_null_test();printf(\n);// json对象获取值示例(数组 对象 字符串 数值get_json_value_test();return 0;
}
编译arcojson.c arcojson.h example.c三个文件放在同一目录下然后 gcc arcojson.c example.c -o test 运行 ./test
