An optional format specification string can be specified
in order to select specific output base, left or right justification,
blank or zero fill, and field width.
A format specification string is a list of selected
format directives, optionally separated by blanks or commas in order
to avoid ambiguity.
"directive1 directive2, directive3 directive4 ... "
The following table lists the supported format directives
which can be entered in upper- or lower-case:
- +
Current output base ($, #, or % prefix displayed)
- -
Current output base (no prefix)
- +<
Current input base ($, #, or % prefix displayed)
- -<
Current input base (no prefix)
- $
Hex output base ($ prefix displayed)
- #
Decimal output base (# prefix displayed)
- %
Octal output base (% prefix displayed)
- H
Hex output base (no prefix)
- D
Decimal output base (no prefix)
- O
Octal output base (no prefix)
- A
ASCII base (use "." for non-printable chars)
- N
ASCII base (loads actual non-printable chars)
- L
Left justified
- R
Right justified
- B
Blank filled
- Z
Zero filled
- M
Minimum field width, based on value
- F
Fixed field width, based on the type of value
- Wn
User specified field width n
- T
Typed (display the type of the value)
- U
Untyped (do not display the type of the value)
- QS
Quote single (surround w/ single quotes)
- QD
Quote double (surround w/ double quotes)
- QO
Quote original (surround w/ original quote character)
- QN
Quote none (no quotes)
The M directive (minimum field width) selects the minimum
possible field width necessary to format all significant digits
(or characters in the case of string inputs).
The F directive (fixed field width) selects a fixed
field width based on the type of the value and the selected output
base. Fixed field widths are listed in the following table:
| Types | hex($,H) | dec(#,D) | oct(%,O) | ascii(A,N) |
|---|
| S16,U16 | 4 | 6 | 6 | 2 |
| S32,U32 | 8 | 10 | 11 | 4 |
| S64 | 16 | 20 | 22 | 8 |
| SPTR | 8 | 10 | 11 | 4 |
| LPTR Class | 8.8 | 10.10 | 11.11 | 8 |
| EADDR Class | 8.16 | 10.20 | 11.22 | 12 |
| STR | field width =
length of the string |
The Wn directive (variable field width) allows the user
to specify the desired field width. The W directive can be specified with an arbitrary expression.
If the specified width is less than the minimum necessary width
to display the value, then the user width is ignored, and the minimum
width is used instead. All significant digits are always printed. For
example:
number:"w6"
number:"w2*3"
The number of positions specified (either by Wn or F) does not include the characters required for
the radix indicator (if specified) or sign (if negative). Also,
the sign and radix indicator is always positioned just preceding
the first (leftmost) character.
Zero versus blank fill applies to leading spaces (for right
justification) only. Trailing spaces are always blank filled.
In specifications with quotes, the quotes do not count in
the number of positions specified. The string is built such that
it appears inside the quotes as it would without the quotes.
The T directive (typed) displays the type of the value,
preceding the value. The U directive (untyped) suppresses the display of
the type. Types are displayed in uppercase, with a single trailing
blank. The width of the type display string varies, based on the
type, and it is independent of any specified width (M, F, or Wn) for the value display.
For values of type LPTR (long pointer, sid.offset, or seg.offset) and EADDR (extended address, sid.offset or ldev.offset), two separate format directives can be specified.
Each is separated by a dot, ".", to indicate individual formatting
choices for the "sid" portion and the "offset" portion. This is true for all code pointers (ACPTR - Absolute Code pointers: CST,
CSTX; LCPTR - Logical Code Pointers: PROG, GRP, PUB, LGRP, LPUB, SYS, USER, TRANS). For example:
pc:"+.-, w4.8, r.l, b.z"
The following default values are used for omitted format directives.
Note that the default format directives depend on the type of value
to be formatted:
value type default format
---------- --------------
STR, BOOL - R B M U
U16,S16,U32,S32,S64 + R B M U
SPTR + R Z F U
LPTR +.- R.L B.Z M.F U
ACPTR LCPTR +.- R.L B.Z M.F T
CST PROG +.- R.L B.Z M.F T
CSTX GRP +.- R.L B.Z M.F T
PUB +.- R.L B.Z M.F T
LGRP +.- R.L B.Z M.F T
LPUB +.- R.L B.Z M.F T
SYS +.- R.L B.Z M.F T
USER +.- R.L B.Z M.F T
TRANS +.- R.L B.Z M.F T
EADDR +.- R.L B.Z M.F U
SADDR +.- R.L B.Z M.F T
Note that absolute code pointers, logical code pointers and
extended addresses display their types (T) by default. All other types default to (U) untyped.
The Cn (column n) directive moves the current output
buffer position to the specified column position prior to the next
write into the output buffer. Column numbers start at column 1.
For example:
number:"c6"
Note: The Cn directive is ignored by the ASC function but is honored by the W, WL and WP commands.
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