summaryrefslogtreecommitdiff
path: root/Source/cmHexFileConverter.cxx
blob: 6ea597ea5068395deb9fc787b2e37c4b8cd86d27 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmHexFileConverter.h"

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

#define INTEL_HEX_MIN_LINE_LENGTH     (1+8        +2)
#define INTEL_HEX_MAX_LINE_LENGTH     (1+8+(256*2)+2)
#define MOTOROLA_SREC_MIN_LINE_LENGTH (2+2+4        +2)
#define MOTOROLA_SREC_MAX_LINE_LENGTH (2+2+8+(256*2)+2)

// might go to SystemTools ?
static bool cm_IsHexChar(char c)
{
  return (((c >= '0') && (c <= '9'))
         || ((c >= 'a') && (c <= 'f'))
         || ((c >= 'A') && (c <= 'F')));
}

static unsigned int ChompStrlen(const char* line)
{
  if (line == 0)
    {
    return 0;
    }
  unsigned int  length = static_cast<unsigned int>(strlen(line));
  if ((line[length-1] == '\n') || (line[length-1] == '\r'))
    {
    length--;
    }
  if ((line[length-1] == '\n') || (line[length-1] == '\r'))
    {
    length--;
    }
  return length;
}

static bool OutputBin(FILE* file, const char * buf,
                      unsigned int startIndex, unsigned int stopIndex)
{
  bool success = true;
  char hexNumber[3];
  hexNumber[2] = '\0';
  char outBuf[256];
  unsigned int outBufCount = 0;
  for (unsigned int i = startIndex; i < stopIndex; i += 2)
    {
    hexNumber[0] = buf[i];
    hexNumber[1] = buf[i+1];
    unsigned int convertedByte = 0;
    if (sscanf(hexNumber, "%x", &convertedByte) != 1)
      {
      success = false;
      break;
      }
    outBuf[outBufCount] = static_cast<char>(convertedByte & 0xff);
    outBufCount++;
    }
  if (success)
    {
    success = (fwrite(outBuf, 1, outBufCount, file)==outBufCount);
    }
  return success;
}

// see http://www.die.net/doc/linux/man/man5/srec.5.html
static bool ConvertMotorolaSrecLine(const char* buf, FILE* outFile)
{
  unsigned int slen = ChompStrlen(buf);
  if ((slen < MOTOROLA_SREC_MIN_LINE_LENGTH)
       || (slen > MOTOROLA_SREC_MAX_LINE_LENGTH))
    {
    return false;
    }

  // line length must be even
  if (slen % 2 == 1)
    {
    return false;
    }

  if (buf[0] != 'S')
    {
    return false;
    }

  unsigned int dataStart = 0;
  // ignore extra address records
  if ((buf[1] == '5') || (buf[1] == '7') || (buf[1] == '8') || (buf[1] == '9'))
    {
    return true;
    }
  else if (buf[1] == '1')
    {
    dataStart = 8;
    }
  else if (buf[1] == '2')
    {
    dataStart = 10;
    }
  else if (buf[1] == '3')
    {
    dataStart = 12;
    }
  else // unknown record type
    {
    return false;
    }

  // ignore the last two bytes  (checksum)
  return OutputBin(outFile, buf, dataStart, slen - 2);
}

// see http://en.wikipedia.org/wiki/Intel_hex
static bool ConvertIntelHexLine(const char* buf, FILE* outFile)
{
  unsigned int slen = ChompStrlen(buf);
  if ((slen < INTEL_HEX_MIN_LINE_LENGTH)
       || (slen > INTEL_HEX_MAX_LINE_LENGTH))
    {
    return false;
    }

  // line length must be odd
  if (slen % 2 == 0)
    {
    return false;
    }

  if ((buf[0] != ':') || (buf[7] != '0'))
    {
    return false;
    }

  unsigned int dataStart = 0;
  if ((buf[8] == '0') || (buf[8] == '1'))
    {
    dataStart = 9;
    }
  // ignore extra address records
  else if ((buf[8] == '2') || (buf[8] == '3') || (buf[8] == '4')
            || (buf[8] == '5'))
    {
    return true;
    }
  else  // unknown record type
    {
    return false;
    }

// ignore the last two bytes  (checksum)
  return OutputBin(outFile, buf, dataStart, slen - 2);
}

cmHexFileConverter::FileType cmHexFileConverter::DetermineFileType(
                                                        const char* inFileName)
{
  char buf[1024];
  FILE* inFile = cmsys::SystemTools::Fopen(inFileName, "rb");
  if (inFile == 0)
    {
    return Binary;
    }

  if(!fgets(buf, 1024, inFile))
    {
    buf[0] = 0;
    }
  fclose(inFile);
  FileType type = Binary;
  unsigned int minLineLength = 0;
  unsigned int maxLineLength = 0;
  if (buf[0] == ':') // might be an intel hex file
    {
    type = IntelHex;
    minLineLength = INTEL_HEX_MIN_LINE_LENGTH;
    maxLineLength = INTEL_HEX_MAX_LINE_LENGTH;
    }
  else if (buf[0] == 'S') // might be a motorola srec file
    {
    type = MotorolaSrec;
    minLineLength = MOTOROLA_SREC_MIN_LINE_LENGTH;
    maxLineLength = MOTOROLA_SREC_MAX_LINE_LENGTH;
    }
  else
    {
    return Binary;
    }

  unsigned int slen = ChompStrlen(buf);
  if ((slen < minLineLength) || (slen > maxLineLength))
    {
    return Binary;
    }

  for (unsigned int i = 1; i < slen; i++)
    {
    if (!cm_IsHexChar(buf[i]))
      {
      return Binary;
      }
    }
  return type;
}

bool cmHexFileConverter::TryConvert(const char* inFileName,
                                    const char* outFileName)
{
  FileType type = DetermineFileType(inFileName);
  if (type == Binary)
    {
    return false;
    }

  // try to open the file
  FILE* inFile = cmsys::SystemTools::Fopen(inFileName, "rb");
  FILE* outFile = cmsys::SystemTools::Fopen(outFileName, "wb");
  if ((inFile == 0) || (outFile == 0))
    {
    if (inFile != 0)
      {
      fclose(inFile);
      }
    if (outFile != 0)
      {
      fclose(outFile);
      }
    return false;
    }

  // convert them line by line
  bool success = false;
  char buf[1024];
  while (fgets(buf, 1024, inFile) != 0)
    {
    if (type == MotorolaSrec)
      {
      success = ConvertMotorolaSrecLine(buf, outFile);
      }
    else if (type == IntelHex)
      {
      success = ConvertIntelHexLine(buf, outFile);
      }
    if (success == false)
      {
      break;
      }
    }

  // close them again
  fclose(inFile);
  fclose(outFile);
  return success;
}