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/*
  This file is part of demiurge.

  demiurge is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  demiurge is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with demiurge.  If not, see <https://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

struct memory
{
	char *response;
	size_t size;
};

/* This function fucking sucks and should use something else. I'll
 * have to rewrite this shit function some day. But for now, it will
 * do the job.
 * TODO: Check for errors
 */

/* Be aware with buffer overflows, fscanf() */

int
get_tokens_from_file(char *filename,
				 char *instance,
				 char *client_id,
				 char *client_secret,
				 char *access_token)
{
	FILE *fp = fopen(filename, "r");
	if(fp == NULL)
		return -1;
	fscanf(fp, "instance=%s\n", instance);
	fscanf(fp, "client_id=%s\n", client_id);
	fscanf(fp, "client_secret=%s\n", client_secret);
	fscanf(fp, "access_token=%s\n", access_token);

	return 0;
}

size_t
cb(void *data, size_t size, size_t nmemb, void *userp)
{
	size_t realsize = size * nmemb;
	struct memory *mem = (struct memory *)userp;

	char *ptr = realloc(mem->response, mem->size + realsize + 1);
	if(ptr == NULL)
		return 0; /* out of memory! */

	mem->response = ptr;
	memcpy(&(mem->response[mem->size]), data, realsize);
	mem->size += realsize;
	mem->response[mem->size] = 0;

	return realsize;
}

size_t
write_data(void *buffer, size_t size, size_t nmemb, void *userp)
{

	memcpy(userp, buffer, nmemb * size);
	return 0;
}

/* like puts() but writes to stderr */

void
eputs(const char *s)
{
	fprintf(stderr, "%s\n", s);
}