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Ax51 User's Guide
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MPL Macro Processor
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Appendix
Comparison Functions
The MPL comparison functions compare two string arguments and return a value based on the comparison. If the function evaluates to TRUE, the function returns a value of 1. If the function evaluates to FALSE, the function returns a value of 0. The arguments to these functions may contain macro calls (which are expanded before the comparison occurs).
| Function | Description |
|---|---|
| %EOS (arg1, arg2) | The EOS function compares arg1 and arg2 and returns a value of TRUE if they are identical. |
| %NES (arg1, arg2) | The NES function compares arg1 and arg2 and returns a value of TRUE if they are different. |
| %LTS (arg1, arg2) | The LTS function compares arg1 and arg2 and returns a value of TRUE if arg1 is less than arg2. |
| %LES (arg1, arg2) | The LES function compares arg1 and arg2 and returns a value of TRUE if arg1 is less than or equal arg2. |
| %GTS (arg1, arg2) | The GTS function compares arg1 and arg2 and returns a value of TRUE if arg1 is greater than arg2. |
| %GES (arg1, arg2) | The GES function compares arg1 and arg2 and returns a value of TRUE if arg1 is greater than or equal arg2. |
Examples
%EQS (Ax51, Ax51)
The above comparison is FALSE (0). The space after the comma is part of the second argument.
%LTS (Ax51,ax51)
The above comparison is TRUE (1). The lowercase characters have a higher ASCII value than the uppercase characters.
%GTS (10,16)
The above comparison is FALSE (0). These macros compare strings—not numerical values. ASCII character 6 is greater than ASCII character 1.
%GES (ax51,ax51 )
The above comparison is FALSE (0). The space at the end of the second argument makes the second argument greater than the first.
%*DEFINE (VAR1) (Ax51) %*DEFINE (VAR2) (%VAR1) %EQS (%VAR1,%VAR2)
The above comparison is TRUE (1). The EQS Macro arguments expand to %EQS(Ax51,Ax51).
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