perf: Eliminated call to ungetc() for better performance
Fixed lack of EOF detection introduced in last change (months ago!)
Fixed issue with reading and saving empty strings
Added sanity checks and fixed parameters
Added grouping parens to reduce ambiguity warnings.
Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h
Replaced inline copyright notice with #include "copyright.h"
Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
updated revision number for release 2.0
created words.c for manipulating words in strings
Initial revision
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