diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/umddvi/h/num.h |
Initial commit
Diffstat (limited to 'dviware/umddvi/h/num.h')
-rw-r--r-- | dviware/umddvi/h/num.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/dviware/umddvi/h/num.h b/dviware/umddvi/h/num.h new file mode 100644 index 0000000000..823bb3f5b5 --- /dev/null +++ b/dviware/umddvi/h/num.h @@ -0,0 +1,38 @@ +/* + * Copyright (c) 1987 University of Maryland Department of Computer Science. + * All rights reserved. Permission to copy for any purpose is hereby granted + * so long as this copyright notice remains intact. + */ + +/* + * Pointer I/O: numbers. + * + * We deal in fixed format numbers and pointers here. + * For file I/O, see fio.h. + */ + +/* + * Get one unsigned byte. Note that this is a proper expression. + * The rest have more limited contexts, and are therefore OddLy + * CapItaliseD. + */ +#define pgetbyte(p) UnSign8(*(p)++) + +/* + * Get a two-byte unsigned integer, a three-byte unsigned integer, + * or a four-byte signed integer. + */ +#define pGetWord(p, r) ((r) = UnSign8(*(p)++) << 8, \ + (r) |= UnSign8(*(p)++)) +#define pGet3Byte(p,r) ((r) = UnSign8(*(p)++) << 16, \ + (r) |= UnSign8(*(p)++) << 8, \ + (r) |= UnSign8(*(p)++)) +#define pGetLong(p, r) ((r) = UnSign8(*(p)++) << 24, \ + (r) |= UnSign8(*(p)++) << 16, \ + (r) |= UnSign8(*(p)++) << 8, \ + (r) |= UnSign8(*(p)++)) + +/* + * ADD pputbyte, pPutWord, pPut3Byte, pPutLong HERE IF THEY PROVE + * USEFUL. (But then must consider changing PutWord &c in fio.h.) + */ |