PLATYPUS

Buffer Descriptor for the PLATYPUS language specification

Building

In macOS/Linux

Requires

gcc (tested in version 6.3.x) or clang (tested under LLVM clang-0800.0.42.1)

• make [gcc | clang]
  • Default is to build both versions (this is an aftermath of testing behaviour from different compilers)
  • It is safe to modify the default to either gcc or clang if you don't have one of them
• NOTE: I haven't tested or created make targets for the scanner yet.

Windows

Requires

• msvc (tested under Visual Studio 2015 with Update 3, however VS2013 shouldn't behave abnormally either, nor should 2017)
• Disable language extensions (use ANSI C)

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Running

Running the Buffer only

• macOS/linux
  • $ ./buffer_<compiler> <file> [f | a | m] > <out_file>
• Windows
  • $ buffer <file> f | a | m] > <out_file>

Usage

• F: fixed capacity mode. Buffe will not auto-resize if not enough space for the file
• A: additive mode: Buffer will resize in a linear increment.
• M: multiplicative mode: Buffer will resize based on a pre-set multiplier based on remaining allowed memory space ($SHRT_MAX bytes)

Notes

This is in no way complete, it is missing a scanner implementation, parser, symbol table, etc.

You can modify the initial capacity and increment factor defined in platy_bt.c (should really make that a command line parameter in a future release)

• Increment factor range for additive mode: 1 - 255. (setting this to 0 implies fixed mode, regardless of the mode given in the command line)
• Initial capacity range (in bytes): 0 - 32767 (SHRT_MAX)
• This is due to my environment's install locations for the C include libraries:
  • Inside buffer.h, there is a #DEFINE line for MACOS_DEP. If you are using a Linux system or Windows and your malloc.h is actually named malloc.h, you can leave #undef MACOS_DEP alone, otherwise comment it out.