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 #include "pld.h"
  26 #include "log.h"
  27
  28 #include <sys/stat.h>
  29
  30
  31 int read_section(FILE *input_file, int length_size, char section, u32 *buffer_length, u8 **buffer)
  32 {
  33         u8 length_buffer[4];
  34         int length;
  35         char section_char;
  36         int read_count;
  37
  38         if ((length_size != 2) && (length_size != 4))
  39         {
  40                 LOG_ERROR("BUG: length_size neither 2 nor 4");
  41                 return ERROR_PLD_FILE_LOAD_FAILED;
  42         }
  43
  44         if ((read_count = fread(&section_char, 1, 1, input_file)) != 1)
  45         {
  46                 return ERROR_PLD_FILE_LOAD_FAILED;
  47         }
  48
  49         if (section_char != section)
  50         {
  51                 return ERROR_PLD_FILE_LOAD_FAILED;
  52         }
  53
  54         if ((read_count = fread(length_buffer, 1, length_size, input_file)) != length_size)
  55         {
  56                 return ERROR_PLD_FILE_LOAD_FAILED;
  57         }
  58
  59         if (length_size == 4)
  60                 length = be_to_h_u32(length_buffer);
  61         else /* (length_size == 2) */
  62                 length = be_to_h_u16(length_buffer);
  63
  64         if (buffer_length)
  65                 *buffer_length = length;
  66
  67         *buffer = malloc(length);
  68
  69         if ((read_count = fread(*buffer, 1, length, input_file)) != length)
  70         {
  71                 return ERROR_PLD_FILE_LOAD_FAILED;
  72         }
  73
  74         return ERROR_OK;
  75 }
  76
  77 int xilinx_read_bit_file(xilinx_bit_file_t *bit_file, char *filename)
  78 {
  79         FILE *input_file;
  80         struct stat input_stat;
  81         int read_count;
  82
  83         if (!filename || !bit_file)
  84                 return ERROR_INVALID_ARGUMENTS;
  85
  86         if (stat(filename, &input_stat) == -1)
  87         {
  88                 LOG_ERROR("couldn't stat() %s: %s", filename, strerror(errno));
  89                 return ERROR_PLD_FILE_LOAD_FAILED;
  90         }
  91
  92         if (S_ISDIR(input_stat.st_mode))
  93         {
  94                 LOG_ERROR("%s is a directory", filename);
  95                 return ERROR_PLD_FILE_LOAD_FAILED;
  96         }
  97
  98         if (input_stat.st_size == 0){
  99                 LOG_ERROR("Empty file %s", filename);
 100                 return ERROR_PLD_FILE_LOAD_FAILED;
 101         }
 102
 103         if (!(input_file = fopen(filename, "rb")))
 104         {
 105                 LOG_ERROR("couldn't open %s: %s", filename, strerror(errno));
 106                 return ERROR_PLD_FILE_LOAD_FAILED;
 107         }
 108
 109         if ((read_count = fread(bit_file->unknown_header, 1, 13, input_file)) != 13)
 110         {
 111                 LOG_ERROR("couldn't read unknown_header from file '%s'", filename);
 112                 return ERROR_PLD_FILE_LOAD_FAILED;
 113         }
 114
 115         if (read_section(input_file, 2, 'a', NULL, &bit_file->source_file) != ERROR_OK)
 116                 return ERROR_PLD_FILE_LOAD_FAILED;
 117
 118         if (read_section(input_file, 2, 'b', NULL, &bit_file->part_name) != ERROR_OK)
 119                 return ERROR_PLD_FILE_LOAD_FAILED;
 120
 121         if (read_section(input_file, 2, 'c', NULL, &bit_file->date) != ERROR_OK)
 122                 return ERROR_PLD_FILE_LOAD_FAILED;
 123
 124         if (read_section(input_file, 2, 'd', NULL, &bit_file->time) != ERROR_OK)
 125                 return ERROR_PLD_FILE_LOAD_FAILED;
 126
 127         if (read_section(input_file, 4, 'e', &bit_file->length, &bit_file->data) != ERROR_OK)
 128                 return ERROR_PLD_FILE_LOAD_FAILED;
 129
 130         LOG_DEBUG("bit_file: %s %s %s,%s %i", bit_file->source_file, bit_file->part_name,
 131                 bit_file->date, bit_file->time, bit_file->length);
 132
 133         fclose(input_file);
 134
 135         return ERROR_OK;
 136 }