Dbx 1024 User's Guide download pdf (Page 48)

Chapter 5: Examining and Changing Data

language precedence. You can also use parentheses to explicitly determine

the order of evaluation.

Table 5-1 lists the operators provided by dbx.

The# operator takes the line number speciﬁed by the expression that follows

it and returns the address of that source line. If you precede the # operator

with a ﬁlename enclosed in quotation marks, the # operator returns the

address of the line number in the ﬁle you specify. If you precede the #

operator with the name of a procedure, dbx identiﬁes the source ﬁle that

contains the procedure and returns the address of the line number in that

ﬁle.

For example, to print the address of line 27 in the current source ﬁle, enter:

(dbx) print #27

Table 5-1 dbx Language Independent Operators

Operator Description

not Unary operator returning false if the operand is true

or Binary logical operator returning true if either operand is

nonzero

xor Binary operator returning the exclusive-OR of its operands

/ Binary division operator (you can also use “//” for division)

div Binary operator that coerces its operands to integers before

dividing

mod Binary operator returning op1 modulo op2. This is equivalent

to the C “%” operator

#exp Unary operator returning the address of source line speciﬁed

by exp

"ﬁle"#exp Unary operator returning the address of source line speciﬁed

by exp in the ﬁle speciﬁed by ﬁle

proc #exp Unary operator returning the address of source line speciﬁed

by exp in the ﬁle containing the procedure proc

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 157 158

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Dbx 1024 User's Guide Page 48