src/bin/hid_decode/hid_decode.cpp

   1 /*
   2  * Copyright 2010, Michael Lotz, mmlr@mlotz.ch.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include "HIDCollection.h"
   7 #include "HIDParser.h"
   8 #include "HIDReport.h"
   9
  10 #include <File.h>
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15
  16
  17 int
  18 main(int argc, char *argv[])
  19 {
  20         if (argc < 2) {
  21                 printf("usage: %s <hid_descriptor_file>\n", argv[0]);
  22                 return 1;
  23         }
  24
  25         BFile file(argv[1], B_READ_ONLY);
  26         if (!file.IsReadable()) {
  27                 printf("can't open file \"%s\" for reading\n", argv[1]);
  28                 return 2;
  29         }
  30
  31         off_t descriptorLength;
  32         file.GetSize(&descriptorLength);
  33
  34         uint8 *reportDescriptor = (uint8 *)malloc(descriptorLength);
  35         if (reportDescriptor == NULL) {
  36                 printf("failed to allocate buffer of %lld bytes\n", descriptorLength);
  37                 return 3;
  38         }
  39
  40         ssize_t read = file.Read(reportDescriptor, descriptorLength);
  41         if (read != descriptorLength) {
  42                 printf("failed to read file of %lld bytes: %s\n", descriptorLength,
  43                         strerror(read));
  44                 return 4;
  45         }
  46
  47         HIDParser parser(NULL);
  48         status_t result = parser.ParseReportDescriptor(reportDescriptor,
  49                 descriptorLength);
  50
  51         free(reportDescriptor);
  52         if (result != B_OK) {
  53                 printf("failed to parse descriptor: %s\n", strerror(result));
  54                 return 5;
  55         }
  56
  57         parser.PrintToStream();
  58         return 0;
  59 }