peek_block
char cha = peek_block(pa, x) & 0xFF;
char chb = peek_block(pb, x) & 0xFF;
char cha = peek_block(pa, x) & 0xFF;
char chb = peek_block(pb, x) & 0xFF;
char ch = peek_block(pa, n) & 0xFF;
char ch = peek_block(pb, n) & 0xFF;
if ((peek_block(pa, n) & 0xFF) == '\t')
ch = peek_block(&diff_head, x);
if (ch == peek_block(&diff_head, x + 1) &&
ch == peek_block(&diff_head, x + 2) &&
' ' == (peek_block(&diff_head, x + 3) & 0xFF))
ch = peek_block(&diff_head, x);
if (ch == peek_block(&diff_head, x + 1) &&
ch == peek_block(&diff_head, x + 2) &&
' ' == (peek_block(&diff_head, x + 3) & 0xFF))
ch = peek_block(&diff_head, x);
ch = peek_block(&diff_head, x);
ch = peek_block(&diff_head, x);
chn = peek_block(&diff_head, x + 1);
ch = peek_block(&diff_head, x);
ch = peek_block(&diff_a_head, x) & 0xFF;
ch = peek_block(&diff_a_head, x);
chn = peek_block(&diff_a_head, x + 1);
ch = peek_block(&diff_a_head, x);
ch = peek_block(&diff_a_head, x);
chn = peek_block(&diff_a_head, x + 1);
ch = peek_block(&diff_a_head, x);
ch = peek_block(&diff_a_head, x);
chn = peek_block(&diff_a_head, x);
ch = peek_block(&diff_a_head, x);
chn = peek_block(&diff_a_head, x + 1);
ch = peek_block(&diff_a_head, x);
ch = peek_block(&diff_a_head, x);
ch = peek_block(&diff_a_head, y1);