[GRASS5] Oddity: r3.null

Brad Douglas rez at touchofmadness.com
Sat Aug 13 08:25:17 EDT 2005

I recently added -Werror-implicit-function-declaration to my compiler
flags to identify source that needs 'upgrading' and function

While making changes to r3.null (null_main.c), I noticed the following

if (G3d_isNullValueNum (&value, G3D_DOUBLE)) {
    if (modifyNull) {
        value = newNullVal;
} [...]

modifyNull is actually a void function with a number of parameters, so
the truth statement is always true, testing for the existence of the

Can someone direct me as to what the purpose of this is?  An
evolutionary relic?  Any help is greatly appreciated.


Brad Douglas <rez at touchofmadness.com>

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