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/**
* Copyright © 2018 IBM Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include "gpio_json.h"
#define GPIO_FILE "/etc/default/obmc/gpio/gpio_defs.json"
cJSON* load_json()
{
FILE* fd = fopen(GPIO_FILE, "r");
if (!fd)
{
fprintf(stderr, "Unable to open GPIO JSON file %s\n", GPIO_FILE);
return NULL;
}
fseek(fd, 0, SEEK_END);
long size = ftell(fd);
rewind(fd);
char* data = malloc(size + 1);
size_t rc = fread(data, 1, size, fd);
fclose(fd);
if (rc != size)
{
free(data);
fprintf(stderr, "Only read %d out of %ld bytes of GPIO file %s\n",
rc, size, GPIO_FILE);
return NULL;
}
data[size] = '\0';
cJSON* json = cJSON_Parse(data);
free(data);
if (json == NULL)
{
fprintf(stderr, "Failed parsing GPIO file %s\n", GPIO_FILE);
const char* error_loc = cJSON_GetErrorPtr();
if (error_loc != NULL)
{
fprintf(stderr, "JSON error at %s\n", error_loc);
}
}
return json;
}
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