Compiled-In Limitations

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Libero
Version 2.32

Compiled-In Limitations

A number of more-or-less arbitrary limits are defined in the header file lrpriv.h. If you need to, you can increase these, then recompile all Libero programs (and if you are smart, drop me a line explaining your reasons):

LR_SYMBOLMAX - the size of Libero's symbol table. This table is used to hold all state, event, and module names. Defined as 32000; maximum value is 32767.
LR_STATEMAX - the maximum number of states in the dialog. Defined as 1000. Maximum value is 16383, assuming schema can handle it.
LR_EVENTMAX - the maximum number of different events in the dialog. Defined as 1000. Maximum value is 16383, assuming schema can handle it.
LR_MODULEMAX - the maximum number of different modules in the dialog. Defined as 1000. Maximum value is 16383, assuming schema can handle it.
LR_VECTORMAX - the maximum number of different vectors in the dialog. Defined as 1000. LR_VECTORMAX * 2 * $maxaction should not be larger than 32k.
LR_FILENAMEMAX - the maximum size of a filename with extension, but not path. Defined as 128 characters.
LR_HEADER_WIDTH - the default width of a header line. For various archaic reasons I like this to be 79. You can change this in a schema by setting $stub_width.
LR_RUNAWAY_LIMIT - the number of times you can go through a :do loop before Libero says thinks you are in trouble. Defined as 1000. Maximum value is 32767.
LR_ROW_WIDTH - the default width of one line of a $row. For various reasons I like this to be 60. You can change this in a schema by setting $row_width.

The header file prelude.h also defines a constant LINE_MAX, with the value 255, which is used to allocate buffers for input and full filenames (ie. including path). You should not write dialogs wider than a normal page (ie. 80 columns).

Libero allocates memory dynamically to store its dialog definition, so the maximum size of a dialog actually depends on available memory. You should only change the constants in lrpriv.h if you get a message that specifically says that you have reached such a limit.

The code that the standard C schema generates assumes that events can be stored in a signed 16-bit word; while state, module, and action numbers can be stored in an unsigned 16-bit word. A more compact version could be made by using 8-bit values.

If you change Libero, or suspect bugs, compile with the symbol DEBUG defined. This switches on the assertions that are sprinkled through the code. The executable will be a little larger, but if a bug corrupts Libero's internal data structures, you will (usually) get a nice message instead of an unpredictable crash.