src/pld/xilinx_bit.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "xilinx_bit.h"
  25
  26 #include "pld.h"
  27 #include "log.h"
  28
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <sys/stat.h>
  32 #include <fcntl.h>
  33 #include <string.h>
  34 #include <errno.h>
  35
  36 #include <sys/time.h>
  37 #include <time.h>
  38
  39 int read_section(FILE *input_file, int length_size, char section, u32 *buffer_length, u8 **buffer)
  40 {
  41         u8 length_buffer[4];
  42         int length;
  43         char section_char;
  44         int read_count;
  45
  46         if ((length_size != 2) && (length_size != 4))
  47         {
  48                 LOG_ERROR("BUG: length_size neither 2 nor 4");
  49                 return ERROR_PLD_FILE_LOAD_FAILED;
  50         }
  51
  52         if ((read_count = fread(&section_char, 1, 1, input_file)) != 1)
  53         {
  54                 return ERROR_PLD_FILE_LOAD_FAILED;
  55         }
  56
  57         if (section_char != section)
  58         {
  59                 return ERROR_PLD_FILE_LOAD_FAILED;
  60         }
  61
  62         if ((read_count = fread(length_buffer, 1, length_size, input_file)) != length_size)
  63         {
  64                 return ERROR_PLD_FILE_LOAD_FAILED;
  65         }
  66
  67         if (length_size == 4)
  68                 length = be_to_h_u32(length_buffer);
  69         else /* (length_size == 2) */
  70                 length = be_to_h_u16(length_buffer);
  71
  72         if (buffer_length)
  73                 *buffer_length = length;
  74
  75         *buffer = malloc(length);
  76
  77         if ((read_count = fread(*buffer, 1, length, input_file)) != length)
  78         {
  79                 return ERROR_PLD_FILE_LOAD_FAILED;
  80         }
  81
  82         return ERROR_OK;
  83 }
  84
  85 int xilinx_read_bit_file(xilinx_bit_file_t *bit_file, char *filename)
  86 {
  87         FILE *input_file;
  88         struct stat input_stat;
  89         int read_count;
  90
  91         if (!filename || !bit_file)
  92                 return ERROR_INVALID_ARGUMENTS;
  93
  94         if (stat(filename, &input_stat) == -1)
  95         {
  96                 LOG_ERROR("couldn't stat() %s: %s", filename, strerror(errno));
  97                 return ERROR_PLD_FILE_LOAD_FAILED;
  98         }
  99
 100         if (S_ISDIR(input_stat.st_mode))
 101         {
 102                 LOG_ERROR("%s is a directory", filename);
 103                 return ERROR_PLD_FILE_LOAD_FAILED;
 104         }
 105
 106         if (input_stat.st_size == 0){
 107                 LOG_ERROR("Empty file %s", filename);
 108                 return ERROR_PLD_FILE_LOAD_FAILED;
 109         }
 110
 111         if (!(input_file = fopen(filename, "rb")))
 112         {
 113                 LOG_ERROR("couldn't open %s: %s", filename, strerror(errno));
 114                 return ERROR_PLD_FILE_LOAD_FAILED;
 115         }
 116
 117         if ((read_count = fread(bit_file->unknown_header, 1, 13, input_file)) != 13)
 118         {
 119                 LOG_ERROR("couldn't read unknown_header from file '%s'", filename);
 120                 return ERROR_PLD_FILE_LOAD_FAILED;
 121         }
 122
 123         if (read_section(input_file, 2, 'a', NULL, &bit_file->source_file) != ERROR_OK)
 124                 return ERROR_PLD_FILE_LOAD_FAILED;
 125
 126         if (read_section(input_file, 2, 'b', NULL, &bit_file->part_name) != ERROR_OK)
 127                 return ERROR_PLD_FILE_LOAD_FAILED;
 128
 129         if (read_section(input_file, 2, 'c', NULL, &bit_file->date) != ERROR_OK)
 130                 return ERROR_PLD_FILE_LOAD_FAILED;
 131
 132         if (read_section(input_file, 2, 'd', NULL, &bit_file->time) != ERROR_OK)
 133                 return ERROR_PLD_FILE_LOAD_FAILED;
 134
 135         if (read_section(input_file, 4, 'e', &bit_file->length, &bit_file->data) != ERROR_OK)
 136                 return ERROR_PLD_FILE_LOAD_FAILED;
 137
 138         LOG_DEBUG("bit_file: %s %s %s,%s %i", bit_file->source_file, bit_file->part_name,
 139                 bit_file->date, bit_file->time, bit_file->length);
 140
 141         fclose(input_file);
 142
 143         return ERROR_OK;
 144 }