Name capitalization

• Variable names, C function names and file names MUST be expressed using lower case letters, digits and underscores only. More precisely, entity names MUST be matched by the following regular expression:

            [a-z][a-z.A-Z0-9]
            

  Rationale: for this regular expression: while this is a technical requirement for C code, it is not for filenames. Filenames with uncommon characters or digit prefixes are inelegant.

• C macro names MUST be entirely capitalized.

• C macro arguments MUST be capitalized:

            #define XFREE(Var)      \
              do                    \
              {                     \
                if (Var)            \
                  free(Var);        \
              }                     \
              while (0)