/*
   * (C) Copyright 2013
   *
   * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include "imagetool.h"

  #include <image.h>

  struct image_type_params *imagetool_get_type(int type)

  {

  	struct image_type_params **curr;
  	INIT_SECTION(image_type);
  
  	struct image_type_params **start = __start_image_type;
  	struct image_type_params **end = __stop_image_type;

  	for (curr = start; curr != end; curr++) {

  		if ((*curr)->check_image_type) {
  			if (!(*curr)->check_image_type(type))
  				return *curr;

  		}
  	}
  	return NULL;
  }
  
  int imagetool_verify_print_header(
  	void *ptr,
  	struct stat *sbuf,
  	struct image_type_params *tparams,
  	struct image_tool_params *params)
  {
  	int retval = -1;

  	struct image_type_params **curr;
  	INIT_SECTION(image_type);

  	struct image_type_params **start = __start_image_type;
  	struct image_type_params **end = __stop_image_type;

  
  	for (curr = start; curr != end; curr++) {

  		if ((*curr)->verify_header) {
  			retval = (*curr)->verify_header((unsigned char *)ptr,

  						     sbuf->st_size, params);
  
  			if (retval == 0) {
  				/*
  				 * Print the image information  if verify is
  				 * successful
  				 */

  				if ((*curr)->print_header) {

  					if (!params->quiet)
  						(*curr)->print_header(ptr);

  				} else {
  					fprintf(stderr,
  						"%s: print_header undefined for %s
  ",

  						params->cmdname, (*curr)->name);

  				}
  				break;
  			}
  		}
  	}
  
  	return retval;
  }

  int imagetool_save_subimage(

  	const char *file_name,
  	ulong file_data,
  	ulong file_len)
  {
  	int dfd;
  
  	dfd = open(file_name, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
  		   S_IRUSR | S_IWUSR);
  	if (dfd < 0) {
  		fprintf(stderr, "Can't open \"%s\": %s
  ",
  			file_name, strerror(errno));
  		return -1;
  	}
  
  	if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) {
  		fprintf(stderr, "Write error on \"%s\": %s
  ",
  			file_name, strerror(errno));
  		close(dfd);
  		return -1;
  	}
  
  	close(dfd);
  
  	return 0;
  }

  
  int imagetool_get_filesize(struct image_tool_params *params, const char *fname)
  {
  	struct stat sbuf;
  	int fd;
  
  	fd = open(fname, O_RDONLY | O_BINARY);
  	if (fd < 0) {
  		fprintf(stderr, "%s: Can't open %s: %s
  ",
  			params->cmdname, fname, strerror(errno));
  		return -1;
  	}
  
  	if (fstat(fd, &sbuf) < 0) {
  		fprintf(stderr, "%s: Can't stat %s: %s
  ",
  			params->cmdname, fname, strerror(errno));

  		close(fd);

  		return -1;
  	}
  	close(fd);
  
  	return sbuf.st_size;
  }

  
  time_t imagetool_get_source_date(
  	 struct image_tool_params *params,
  	 time_t fallback)
  {
  	char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
  
  	if (source_date_epoch == NULL)
  		return fallback;
  
  	time_t time = (time_t) strtol(source_date_epoch, NULL, 10);
  
  	if (gmtime(&time) == NULL) {
  		fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid
  ",
  			params->cmdname);
  		time = 0;
  	}
  
  	return time;
  }