util-snprintf-replacement-20090624

util-snprintf-replacement-20090624

LICENSE BSD

1. Add a test program for *printf functionality.  util/tests/snprintf_test.c

2. Replace OpenAFS implementation of afs_*printf() with Heimdal's version.

3. Add support to Heimdal's version to support:

 - floating point

 - OpenAFS %I ipv4 address formatting (dotted notation and hostname lookup)

 - Microsoft's I32 and I64 integer size modifiers

With these changes OpenAFS gains:

 - output that is compliant with standard *printf implementations.
   the previous implementation had justification, padding and case
   errors.

 - support for a NULL buffer which computes the required size based
   upon the input format and arguments.  the previous implementation
   would crash.

 - support for additional format types.

 - OpenAFS specific implementations of vasnprintf(), vasprintf(),
   asprintf(), and asnprintf().