lib/decode-long-sms.c

   1
   2 #include <stdio.h>
   3 main(int argc, char *argv[])
   4 {
   5
   6         int pos = 0;
   7         char *c;
   8         int carry = 0;
   9
  10         for (c = argv[1]; *c; c+= 2) {
  11                 int b;
  12                 char c1, c2;
  13                 c1 = c[0]; c2 = c[1];
  14                 if (c1 > '9')
  15                         c1 = 10 + (c1-'A');
  16                 else
  17                         c1 = c1 - '0';
  18
  19                 if (c2 > '9')
  20                         c2 = 10 + (c2-'A');
  21                 else
  22                         c2 = c2 - '0';
  23
  24                 b = c1*16 + c2;
  25
  26                 if (pos == 0) {
  27                         if (carry) {
  28                                 printf("%c", carry + ((b&1) << 6));
  29                                 carry = 0;
  30                         }
  31                         b = b >> 1;
  32                 } else {
  33                         b = (b << (pos-1)) | carry;
  34                         carry = (b & 0xff80) >> 7;
  35                         b &=  0x7f;
  36                 }
  37                 printf("%c", b);
  38                 pos++;
  39                 if (pos == 7)
  40                         pos = 0;
  41         }
  42         printf("\n");
  43         exit(0);
  44 }
  45