Convert_Boolean_String

include vmm.inc

mov edx, OFFSET32 String ; points to Boolean string

VMMcall Convert_Boolean_String

jcnot_valid ; carry flag set if string not valid Boolean

mov [Result], eax ; 0 if string is false, -1 if true

The Convert_Boolean_String service converts a string representing a Boolean value, and returns either -1 or 0 to indicate that the string is true or false.

This service is available during initialization only.

Parameters

String

Points to the null-terminated string representing a Boolean value. The service recognizes at least the following Boolean string values:

String Meaning

0 False
1 True
False False
No False
Off False
On True
True True
Yes True

Return Value

The carry flag is clear if the string represents a valid Boolean value. In this case, the EAX register contains either 0 if the string evaluates to false, or -1 if the string evaluates to true. The carry flag is set if the specified string is not valid.

Uses

EAX, Flags

See Also

Convert_Decimal_String, Convert_Fixed_Point_String, Convert_Hex_String