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include vmm.inc
 
mov     edx, OFFSET32 String        ; points to Boolean string
VMMcall Convert_Boolean_String
 
jc      not_valid                   ; carry 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.
 
Parameter  Description
────────────────────────────────────────────────────────────────────────────
 
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
 
Flags, EAX
 
See Also
 
Convert_Decimal_String, Convert_Fixed_Point_String, Convert_Hex_String
 
 
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