Program Listing for File test_cjson.c

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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <cjson/cJSON.h>

int main(int argc, char *argv[])
{
    // read from file
    FILE *fp = fopen("input/test.json", "r");
    fseek(fp, 0, SEEK_END);
    long size = ftell(fp);
    fseek(fp, 0, SEEK_SET);
    char *buffer = (char *)malloc(size + 1);
    fread(buffer, 1, size, fp);
    fclose(fp);
    buffer[size] = '\0';
    // parse
    cJSON *root = cJSON_Parse(buffer);
    free(buffer);
    int status;
    const cJSON *resolution = NULL;
    const cJSON *resolutions = NULL;
    const cJSON *name = NULL;

    if (root == NULL)
    {
        const char *error_ptr = cJSON_GetErrorPtr();
        if (error_ptr != NULL)
        {
            fprintf(stderr, "Error before: %s\n", error_ptr);
        }
        status = 0;
        goto end;
    }

    name = cJSON_GetObjectItemCaseSensitive(root, "name");
    if (cJSON_IsString(name) && (name->valuestring != NULL))
    {
        printf("Checking monitor \"%s\"\n", name->valuestring);
    }

    resolutions = cJSON_GetObjectItemCaseSensitive(root, "resolutions");
    cJSON_ArrayForEach(resolution, resolutions)
    {
        cJSON *width = cJSON_GetObjectItemCaseSensitive(resolution, "width");
        cJSON *height = cJSON_GetObjectItemCaseSensitive(resolution, "height");

        if (!cJSON_IsNumber(width) || !cJSON_IsNumber(height))
        {
            status = 0;
            goto end;
        }

        printf("width: %lf, height: %lf\n", width->valuedouble, height->valuedouble);

        if ((width->valuedouble == 1920) && (height->valuedouble == 1080))
        {
            status = 1;
            goto end;
        }
    }

    end:
        cJSON_Delete(root);
    return 0;
}