[jsmn]parsing된 token 정보 출력하는 printall함수
<parsejsmn.c>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "jsmn.h"
/*
* A small example of jsmn parsing when JSON structure is known and number of
* tokens is predictable.
*/
static int jsoneq(const char *json, jsmntok_t *tok, const char *s) {
if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
strncmp(json + tok->start, s, tok->end - tok->start) == 0) {
return 0;
}
return -1;
}
char * jsmn_StringReader(const char * fileName){
char a[20];
char * b;
FILE *f1;
f1=fopen(fileName,"r");
b=(char *)malloc(sizeof(char));
//a=(char*)malloc(sizeof(char));
while(1){
fgets(a,sizeof(a),f1);
if(feof(f1))break;
b=(char*)realloc(b,strlen(b)+strlen(a));
//printf("\n%d\n",strlen(a));
strncat(b,a,strlen(a));
}
fclose(f1);
return b ;
}
void printall(const char *json,jsmntok_t *t,int tok_count ){
int i=0;
char t_type[20];
for( i=1;i<tok_count;i++){
printf("[%d] %.*s (size: %d, %d~%d,",i,t[i].end-t[i].start, json + t[i].start,t[i].size,t[i].start,t[i].end);
switch(t[i].type){
case 0: strcpy(t_type,"JSMN_UNDEFIEND");break;
case 1: strcpy(t_type,"JSMN_OBJECT");break;
case 2: strcpy(t_type,"JSMN_ARRAY");break;
case 3: strcpy(t_type,"JSMN_STRING");break;
case 4: strcpy(t_type,"JSMN_PRIMITIVE");break;
default: break;
}
printf("%s) \n",t_type);
}
}
void jsmn_init(jsmn_parser *parser);
int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,jsmntok_t *tokens, unsigned int num_tokens);
int main() {
int i;
int r;
jsmn_parser p;
jsmntok_t t[128]; /* We expect no more than 128 tokens */
char fileName[20];
jsmn_init(&p);
printf("Insert a file Name:");
scanf("%s",fileName);
char * JSON_STRING=jsmn_StringReader(fileName);
// printf("%s\n",JSON_STRING);
r = jsmn_parse(&p, JSON_STRING, strlen(JSON_STRING), t, sizeof(t)/sizeof(t[0]));
if (r < 0) {
printf("Failed to parse JSON: %d\n", r);
return 1;
}
/* Assume the top-level element is an object */
if (r < 1 || t[0].type != JSMN_OBJECT) {
printf("Object expected\n");
return 1;
}
#ifdef DEBUG_MODE
printf("r의 값은 %d입니다",r);
#endif
/* Loop over all keys of the root object */
for (i = 1; i < r; i++) {
if (jsoneq(JSON_STRING, &t[i], "name") == 0) {
/* We may use strndup() to fetch string value */
//printf("%.*s",t[i].end-t[i].start,
// JSON_STRING + t[i].start);
printf("- Name: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("User의 token은 %d번째입니다",i);
#endif
} else if (jsoneq(JSON_STRING, &t[i], "keywords") == 0) {
/* We may additionally check if the value is either "true" or "false" */
printf("- Keywords: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Admin의 token은 %d번째입니다",i);
#endif
} else if (jsoneq(JSON_STRING, &t[i], "description") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- Description: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Uid의 token은 %d번째입니다",i);
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "type") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- type: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "url") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- url: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Uid의 token은 %d번째입니다",i);
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "frameworks") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- Frameworks: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Uid의 token은 %d번째입니다",i);
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "platforms") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- Platfroms: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Uid의 token은 %d번째입니다",i);
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "exclude") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- Excludes: %.*s\n", t[i+1].end-t[i+1].start,
JSON_STRING + t[i+1].start);
i++;
#ifdef DEBUG_MODE
printf("Uid의 token은 %d번째입니다",i);
#endif
}
else if (jsoneq(JSON_STRING, &t[i], "examples") == 0) {
int j;
printf("- Exampleis:\n");
if (t[i+1].type != JSMN_ARRAY) {
continue; /* We expect groups to be an array of strings */
}
for (j = 0; j < t[i+1].size; j++) {
jsmntok_t *g = &t[i+j+2];
printf(" * %.*s\n", g->end - g->start, JSON_STRING + g->start);
}
i += t[i+1].size + 1;
}
else if (jsoneq(JSON_STRING, &t[i], "repository") == 0) {
int j;
printf("- Repository:\n");
if (t[i+1].type != JSMN_ARRAY) {
continue; /* We expect groups to be an array of strings */
}
for (j = 0; j < t[i+1].size; j++) {
jsmntok_t *g = &t[i+j+2];
printf(" * %.*s\n", g->end - g->start, JSON_STRING + g->start);
}
i += t[i+1].size + 1;
#ifdef DEBUG_MODE
printf("Object인 groups의 token은 %d번째입니다",i);
#endif
} else {
printf("Unexpected key: %.*s\n", t[i].end-t[i].start,
JSON_STRING + t[i].start);
}
}
printall(JSON_STRING,t,r);
return EXIT_SUCCESS;
}
설명: parsejsmn은 기본적으로 입력된 txt file을 읽어주어서 parsing하는 코드이다. 여기에 printall이라는 함수를 추가했다. 마지막 return 되기전에 printall이라는 함수가 존재한다. parameter는 json_string(입받은 txt을 string form), parsing된 r, token들의 정보를 가진 t로 받는다. 그러면, printall에서는 각각의 token에 대하여 정보를 출력한다
<printall()>
void printall(const char *json,jsmntok_t *t,int tok_count ){
int i=0;
char t_type[20];
for( i=1;i<tok_count;i++){
printf("[%d] %.*s (size: %d, %d~%d,",i,t[i].end-t[i].start, json + t[i].start,t[i].size,t[i].start,t[i].end);
switch(t[i].type){
case 0: strcpy(t_type,"JSMN_UNDEFIEND");break;
case 1: strcpy(t_type,"JSMN_OBJECT");break;
case 2: strcpy(t_type,"JSMN_ARRAY");break;
case 3: strcpy(t_type,"JSMN_STRING");break;
case 4: strcpy(t_type,"JSMN_PRIMITIVE");break;
default: break;
}
printf("%s) \n",t_type);
}
}
출력되는 값들은.....
1. 해당 token의 size
2. token의 문자열 위치(시작과 끝)
3. token의 type
<Output>
