gcc/testsuite/gcc.c-torture/compile/980506-1.c

   1 unsigned char   TIFFFax2DMode[20][256];
   2 unsigned char   TIFFFax2DNextState[20][256];
   3 unsigned char   TIFFFaxUncompAction[20][256];
   4 unsigned char   TIFFFaxUncompNextState[20][256];
   5 unsigned char   TIFFFax1DAction[230][256];
   6 unsigned char   TIFFFax1DNextState[230][256];
   7
   8 typedef struct tableentry {
   9     unsigned short length;
  10     unsigned short code;
  11     short       runlen;
  12 } tableentry;
  13
  14 extern tableentry TIFFFaxWhiteCodes[];
  15 extern tableentry TIFFFaxBlackCodes[];
  16
  17 static short sp_data, sp_bit;
  18
  19 static unsigned char
  20 fetchByte (inbuf)
  21
  22 unsigned char **inbuf;
  23
  24 {
  25     unsigned char byte = **inbuf;
  26     (*inbuf)++;
  27     return (byte);
  28 }
  29
  30 static int
  31 decode_white_run (inbuf)
  32
  33 unsigned char **inbuf;
  34
  35 {
  36     short state = sp_bit;
  37     short action;
  38     int runlen = 0;
  39
  40     for (;;)
  41     {
  42         if (sp_bit == 0)
  43         {
  44         nextbyte:
  45             sp_data = fetchByte (inbuf);
  46         }
  47
  48         action = TIFFFax1DAction[state][sp_data];
  49         state = TIFFFax1DNextState[state][sp_data];
  50         if (action == 0 )
  51             goto nextbyte;
  52         if (action == 1 )
  53             return (-1 );
  54         if (action == 210 )
  55             return (-3 );
  56         sp_bit = state;
  57         action = (TIFFFaxWhiteCodes[ action - 2  ].runlen) ;
  58         runlen += action;
  59         if (action < 64)
  60             return (runlen);
  61     }
  62 }
  63