Ansification and fixed typing/prototype of getheader() and its callback.
Eliminated copystruct() macro, which is unnecessary in ANSI. Reduced ambiguity warnings for nested if/if/else clauses.
Macros for setting binary file mode. Replacing MSDOS by _WIN32.
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
changed getheader() to listen to return value of passed function
Changes for 32-bit PC port
Changes for PC port
updated revision number for release 2.0
added format information to headers
added - option to elide header
Initial revision
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